CN109539241A - A kind of environmental protection flue gas circulation layer combusting boiler and its processing method - Google Patents
A kind of environmental protection flue gas circulation layer combusting boiler and its processing method Download PDFInfo
- Publication number
- CN109539241A CN109539241A CN201811407763.2A CN201811407763A CN109539241A CN 109539241 A CN109539241 A CN 109539241A CN 201811407763 A CN201811407763 A CN 201811407763A CN 109539241 A CN109539241 A CN 109539241A
- Authority
- CN
- China
- Prior art keywords
- cavity
- coal
- traveling
- grate
- pyrolysis
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B80/00—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
- F23B80/02—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel by means for returning flue gases to the combustion chamber or to the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/02—Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
- F23K1/04—Heating fuel prior to delivery to combustion apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The present invention mentions a kind of environmentally friendly flue gas circulation layer combusting boiler and its processing method, the first cavity and the second cavity including bottom connection in the furnace body of the grate firing boiler；At the top of first cavity and/or side is equipped with coal filling hole；Second inside cavity is provided with partition, and the partition is connected with the interconnecting piece of first cavity and second cavity；Drum is equipped at the top of second cavity, drum lower section is equipped with rear arch in the furnace wall of the second cavity, is equipped with after-flame air port close to one end of the first cavity in rear arch；First cavity and the second cavity lower part are equipped with the first traveling-grate stoker；At least two air compartment is set below first traveling-grate stoker；The grate firing boiler is externally provided with charge delivery mechanism；Pipeline in the charge delivery mechanism is connected with the pyrolytic gasification area with the coal-char combustion area respectively.The grate firing boiler can effectively reduce NOx, the discharge of the multi-pollutants such as CO, raising dyestuff burn-off rate.
Description
Technical field
The invention belongs to coal burning apparatus field, it is related to a kind of grate firing boiler and its processing method, more particularly to a kind of
Environmentally friendly flue gas circulation layer combusting boiler and its processing method.
Background technique
The flue gas recirculating technique of coal-burning boiler application at present is by a part of low-temperature flue gas directly or after mixing with air
It is re-fed into burner hearth and participates in auxiliary combustion and flow field integration, increase inert gas content in furnace and reduce ignition temperature, burning speed
Degree also decreases, and reaches and inhibits NOxThe purpose of generation.Experimental study proves that it is less that this technical method is suitable for N content
Gas fired-boiler is all fuel type NO for the overwhelming majorityxCoal-burning boiler, effect is not obvious.Simultaneously in middle-size and small-size industry combustion
In coal burning boiler, due to being also subject to certain restrictions by the application of furnace temperature, stability and effect on coal quality, flue gas recirculating technique.
104696949 A of CN discloses a kind of method of fire coal boiler fume two-phase method denitration, and the method passes through first
Section: boiler smoke circulation, which is strile-backd, reduces NO_x formation and second segment: biogas burns again restores generated nitrogen oxidation
Object completes the denitration of fire coal boiler fume two-phase method.The method uses biogas for burning fuel again, can only meet small-scale
The denitration of fire coal boiler fume is difficult to popularize in large-scale production.
CN 1698934 discloses a kind of opposite-flushing type desulfurization device based on circulating fluidized for coal-burning boiler, the dress
It sets including niter ash cellar, water pump, circulating fluid bed reactor, cleaner and ash bucket；Niter ash cellar and water pump be respectively communicated in
Fluidized-bed reactor lower part, cleaner are connected to fluidized-bed reactor top, and cleaner lower end passes through the ash being attached thereto
Bucket is connected to fluidized-bed reactor lower part, and ash bucket lower end is equipped with grey discharge pipe, and fluidized-bed reactor bottom is equipped with flue gas access tube,
Further include the opposed jets generator for being mounted on the having air source on top in fluidized-bed reactor, throughput be less than or equal to by
The flue gas flow that fluidized-bed reactor bottom is passed through；Feature: liquidate contrary with smoke gas jet is formed inside fluidized bed and is penetrated
Stream inhibits reaction particles flowing up with flue gas, increases particle and air-flow time of contact.Described device flue gas recirculation merely through
One processing, is only applicable to the less gas fired-boiler of N content.
Therefore overcome flue gas recirculating technique in the influence factor of coal-burning boiler application process using novel combustion method
It is to reduce NOxOne of the effective way of polluted gas discharge amount.
Summary of the invention
For the technical problems in the prior art, the present invention provides a kind of environmental-protection gas circulation grate firing boiler and its place
Reason method, on the one hand the grate firing boiler passes through egr mode to be converted into reproducibility pyrolysis gas by semicoke fire coal area harmless
Nitrogen, to effectively reduce NOx, the discharge of the multi-pollutants such as CO, on the other hand by different cloth wind modes by combustion zone
Domain be divided into pyrolysis zone, coal-char combustion area, semicoke reducing zone, burning-out zone fractional combustion mode, improve fuel burn-off rate, especially
It is the burn-off rate of more fire retardant most clean fuel moulded coal.
In order to achieve the above objectives, the invention adopts the following technical scheme:
It is an object of the present invention to provide a kind of grate firing boiler, including bottom connection in the furnace body of the grate firing boiler
First cavity and the second cavity；At the top of first cavity and/or side is equipped with coal filling hole, and first inside cavity is pyrolysis
Preheating zone；Second inside cavity is provided with partition, the connection of the partition and first cavity and second cavity
Portion is connected, and the partition is pyrolytic gasification area close to the first cavity side, and the other side is coal-char combustion area；It is set at the top of second cavity
There is drum, drum lower section is equipped with rear arch in the furnace wall of the second cavity, in the interconnecting piece of rear arch and the first cavity and the second cavity
Between space be equipped with after-flame air port；
First cavity and the second cavity lower part are equipped with the first traveling-grate stoker, and the rear arch is in first traveling-grate stoker
Flue gas circulating area, first traveling-grate stoker and first cavity, the partition and second cavity are formed at top
Between there are gaps；
At least two air compartment is set below first traveling-grate stoker；
The grate firing boiler is externally provided with charge delivery mechanism；Pipeline in the charge delivery mechanism respectively with the pyrolysis
Gasification zone is connected with the coal-char combustion area.
Wherein, the number of air compartment can be for 2,3,4,5,6,7 or 8 etc. and more, but simultaneously not only limit
It is equally applicable in other unlisted numerical value in cited numerical value, the numberical range.
In the present invention, " first " and " second " just for the sake of being distinguished in name, be not to equipment or
Device uses limitation sequentially.
Batcher is set at heretofore described coal filling hole, and one side controls the feeding coal of solid fire coal, on the other hand
Leaking out for boiler can be effectively reduced.
In the present invention, it can be separated by region demarcation plate between the first cavity and the second cavity, region demarcation plate
Flue gas circulating area is formed between rear arch and the first traveling-grate stoker, and burnout degree is set between rear arch end and region demarcation plate
Mouthful.
In the present invention, the partition can be any one in linear type, fold-line-shaped or arc line shaped；The partition and
The first chamber outer wall and/or the second cavity inner wall of one cavity and the second cavity junction form the heat of upper end closed lower ending opening
Solve gasification zone；Or the partition and region demarcation plate form the pyrolytic gasification area of upper end closed lower ending opening.First cavity
It can also remove with the gasification and pyrolysis area by the first chamber outer wall or region divides and separate the first cavity and gas
The first chamber outer wall or region demarcation plate for changing pyrolysis zone, so that the first cavity lower part also becomes a part in gasification and pyrolysis area.
In the present invention, the rear arch of setting can be guided the high-temperature flue gas of back of furnace row to front end, and be pyrolyzed with reproducibility
Gas is sufficiently mixed burning.
In the present invention, the after-flame air hose of setting reinforces flue gas and disturbs and provide oxygen appropriate for flue gas full combustion, drops
Low gas incomplete combustion heat loss.
In the present invention, by be arranged with coal-char combustion distinguish every pyrolytic gasification area, reproducibility pyrolysis gas is led to
It crosses charge delivery mechanism and is transmitted to coal-char combustion area and be converted into harmless nitrogen, flue gas recirculation is realized, to effectively reduce
NOx, the discharge of the multi-pollutants such as CO.
In the present invention, by optimizing the first chain fire-gate staged air distribution, along material operation side on the first traveling-grate stoker
To being divided into coal-char combustion area, burning-out zone and recuperation of heat cooling zone.
As currently preferred technical solution, the charge delivery mechanism includes blower, connects blower and pyrolytic gasification
The first pyrolysis tracheae in area, and the second pyrolysis tracheae of connection blower and coal-char combustion area lower section air compartment.
Preferably, the pyrolysis gas that pyrolytic gasification area generates is transmitted to the coal-char combustion area by the charge delivery mechanism.
As currently preferred technical solution, at least two air compartment being arranged below first traveling-grate stoker is along first
Traveling-grate stoker is set gradually, and preferably 5 air compartments are set gradually along the first traveling-grate stoker.
In the present invention, the fire grate uses staged air distribution, and semicoke restores the semicoke of preignition zone generation with the first traveling-grate stoker
The mobile coal-char combustion area sequentially entered in second chamber, burning-out zone and recuperation of heat cooling zone, are finally excluded with the lime-ash of after-flame
Burner hearth.
As currently preferred technical solution, the first cavity of Yu Suoshu lower section, the first traveling-grate stoker top setting second
Traveling-grate stoker.
Preferably, the described second chain fire-gate running length is not more than the width of the first cavity.
Herein, the width of first cavity refer between the partition of the first cavity to the furnace wall opposite with partition away from
From.
In the present invention, the second chain fire-gate purpose of setting is the generation material of the first cavity being sent into the first chain furnace
Row, while reducing furnace body and leaking out, and realizes being separately controlled for semicoke reduction pre-burning and coal-char combustion, and then improve boiler load tune
Whole ability, and fully ensure that fuel burn-off rate.
Preferably, slag-drip opening is equipped with below second traveling-grate stoker.
As currently preferred technical solution, the furnace wall of first cavity is obliquely installed, and in the first traveling-grate stoker
It is connected, to reduce by the first chain fire-gate length.
The second purpose of the present invention is to provide a kind of processing methods of grate firing boiler, the described method comprises the following steps:
(a) fuel is added from coal filling hole, carries out pyrolytic gasification after pyrolysis preheating, generates tar, pyrolysis gas and semicoke；
(b) pyrolysis gas that step (a) generates is transmitted to coal-char combustion area by charge delivery mechanism, what step (a) generated
Tar and semicoke enter coal-char combustion area by the first traveling-grate stoker, and successively cooling through coal-char combustion, after-flame and recuperation of heat, obtain
The slag body discharge furnace body arrived generates the flue gas generated in flue gas and step (a) afterburnt under burnout degree effect, furnace body is discharged.
As currently preferred technical solution, step (a) fuel is solid fuel and/or solid fuel and desulfurization
The mixture of agent.
Preferably, step (a) the fuel clean moulded coal.
Preferably, the temperature of step (a) the pyrolysis preheating is 300-400 DEG C, such as 300 DEG C, 310 DEG C, 320 DEG C, 330
DEG C, 340 DEG C, 350 DEG C, 360 DEG C, 370 DEG C, 380 DEG C, 390 DEG C or 400 DEG C etc., it is not limited to cited numerical value, the number
It is equally applicable to be worth other unlisted numerical value in range.
As currently preferred technical solution, the temperature of step (a) pyrolytic gasification is 500-600 DEG C, such as 500
DEG C, 510 DEG C, 520 DEG C, 530 DEG C, 540 DEG C, 550 DEG C, 560 DEG C, 570 DEG C, 580 DEG C, 590 DEG C or 600 DEG C etc., but simultaneously not only limit
It is equally applicable in other unlisted numerical value in cited numerical value, the numberical range.
As currently preferred technical solution, the temperature of step (b) coal-char combustion is 900-1000 DEG C, such as 900
DEG C, 910 DEG C, 920 DEG C, 930 DEG C, 940 DEG C, 950 DEG C, 960 DEG C, 970 DEG C, 980 DEG C, 990 DEG C or 1000 DEG C etc., but simultaneously not only limit
It is equally applicable in other unlisted numerical value in cited numerical value, the numberical range.
Preferably, the temperature of step (b) after-flame is 700-900 DEG C, such as 700 DEG C, 720 DEG C, 750 DEG C, 780 DEG C, 800
DEG C, 820 DEG C, 850 DEG C, 880 DEG C or 900 DEG C etc., it is not limited to cited numerical value, other are unlisted in the numberical range
Numerical value it is equally applicable.
Preferably, CO < 500mg/Nm in the flue gas of furnace body is discharged in step (b)3, NOx<200mg/Nm3, SO2<400mg/
Nm3。
As currently preferred technical solution, the described method comprises the following steps:
(a) fuel is added from coal filling hole, carries out pyrolytic gasification in the case where pyrolysis preheats rear bearing, generate tar, pyrolysis gas and
Semicoke, wherein the temperature for being pyrolyzed preheating is 300-400 DEG C, the temperature of pyrolytic gasification is 500-600；
(b) pyrolysis gas that step (a) generates is transmitted to coal-char combustion area by charge delivery mechanism, what step (a) generated
Tar and semicoke enter coal-char combustion area by the first traveling-grate stoker, and successively cooling through coal-char combustion, after-flame and recuperation of heat, obtain
The slag body discharge furnace body arrived generates the flue gas generated in flue gas and step (a) afterburnt under burnout degree effect, furnace body is discharged,
Wherein the temperature of coal-char combustion is 900-1000 DEG C, and the temperature of after-flame is 700-900 DEG C, be discharged CO in the flue gas of furnace body <
500mg/Nm3, NOx < 200mg/Nm3, SO2<400mg/Nm3。
Compared with prior art, the present invention is at least had the advantages that
(1) present invention makes reproducibility pyrolysis gas be converted into harmless nitrogen by semicoke fire coal area by egr mode,
To effectively reduce NOx, the discharge of the multi-pollutants such as CO, make discharge flue gas CO < 500mg/Nm3, NOx<200mg/Nm3, SO2<
400mg/Nm3；
(2) present invention is by being divided into pyrolysis zone, coal-char combustion area, semicoke also for combustion zone by different cloth wind modes
Former area, burning-out zone fractional combustion mode, improve fuel burn-off rate, the after-flame of especially more fire retardant most clean fuel moulded coal
Rate makes fuel burn-off rate reach 80%.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of grate firing boiler described in the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of grate firing boiler described in the embodiment of the present invention 2；
Wherein, 1- coal filling hole, 2- partition, 3- drum, 4- rear arch, 5- after-flame air port, the first traveling-grate stoker of 6-, 7- air compartment,
8- blower 9- first is pyrolyzed tracheae, and 10- second is pyrolyzed tracheae.
Specific embodiment
In order to better illustrate the present invention, it is easy to understand technical solution of the present invention, of the invention is typical but non-limiting
Embodiment is as follows:
Specific embodiment of the invention part provides a kind of grate firing boiler, includes that bottom is connected in the furnace body of the grate firing boiler
The first cavity and the second cavity；At the top of first cavity and/or side is equipped with coal filling hole 1, and first inside cavity is
It is pyrolyzed preheating zone；Second inside cavity is provided with partition 2, the partition 2 and first cavity and second cavity
Interconnecting piece be connected, the partition close to the first cavity side be pyrolytic gasification area, the other side be coal-char combustion area；Second cavity
Top is equipped with drum 3, and drum lower section is equipped with rear arch 4 in the furnace wall of the second cavity, in rear arch 4 and the first cavity and the second cavity
Interconnecting piece between space be equipped with after-flame air port 5；
First cavity and the second cavity lower part are equipped with the first traveling-grate stoker 6, and the rear arch 4 is in first chain furnace
It arranges 6 tops and forms flue gas circulating area, first traveling-grate stoker 6 and first cavity, the partition 2 and described second
There are gaps between cavity；
At least two air compartment 7 is set below first traveling-grate stoker；
The grate firing boiler is externally provided with charge delivery mechanism；Pipeline in the charge delivery mechanism respectively with the pyrolysis
Gasification zone is connected with the coal-char combustion area.
Specific embodiment of the invention part also provides a kind of processing method of above-mentioned grate firing boiler, and the method includes following
Step:
(a) fuel is added from coal filling hole 1, carries out pyrolytic gasification after pyrolysis preheating, generate tar, pyrolysis gas and half
It is burnt；
(b) pyrolysis gas that step (a) generates is transmitted to coal-char combustion area by charge delivery mechanism 8, what step (a) generated
Tar and semicoke are cooling through coal-char combustion, after-flame and recuperation of heat into coal-char combustion area, and successively by the first traveling-grate stoker 4,
Obtained slag body discharge furnace body generates the flue gas generated in flue gas and step (a) afterburnt under burnout degree effect, furnace is discharged
Body.
Embodiment 1
The present embodiment part provides a kind of grate firing boiler, as shown in Figure 1, including that bottom connects in the furnace body of the grate firing boiler
Logical the first cavity and the second cavity；At the top of first cavity and/or side is equipped with coal filling hole 1, first inside cavity
To be pyrolyzed preheating zone；Second inside cavity is provided with fold-line-shaped partition 2, the fold-line-shaped partition 2 and first cavity
It is connected with the first chamber outer wall of the interconnecting piece of second cavity, the partition is pyrolytic gasification close to the first cavity side
Area, the other side are coal-char combustion area；Drum 3 is equipped at the top of second cavity, drum lower section is after the furnace wall of the second cavity is equipped with
Arch 4, the space between rear arch 4 and the first cavity and the interconnecting piece of the second cavity are equipped with after-flame air port 5；
First cavity and the second cavity lower part are equipped with the first traveling-grate stoker 6, and the rear arch 4 is in first chain furnace
It arranges 6 tops and forms flue gas circulating area, first traveling-grate stoker 6 and first cavity, the partition 2 and described second
There are gaps between cavity；
5 air compartments 7 are set below first traveling-grate stoker；
The grate firing boiler is externally provided with blower 8；The blower 8 passes through the first pyrolysis tracheae 9 and the second pyrolysis tracheae respectively
10 are connected with the pyrolytic gasification area and close to the third air compartment 7 of the first cavity.
The processing method of the grate firing boiler the following steps are included:
(a) fuel is added from coal filling hole 1, carries out pyrolytic gasification after pyrolysis preheating, generate tar, pyrolysis gas and half
Coke, wherein the temperature for being pyrolyzed preheating is 300 DEG C, the temperature of pyrolytic gasification is 500 DEG C；
(b) pyrolysis gas that step (a) generates is pyrolyzed tracheae 9 by blower 8, first and the second pyrolysis tracheae 10 is transmitted to half
Burnt combustion zone, the tar and semicoke that step (a) generates enter coal-char combustion area by the first traveling-grate stoker 6, and successively through semicoke
Burning, after-flame and recuperation of heat are cooling, and obtained slag body discharge furnace body generates the flue gas generated in flue gas and step (a) in after-flame
Wind acts on the lower afterburnt, and furnace body is discharged, and wherein the temperature of coal-char combustion is 900 DEG C, and the temperature of after-flame is 700 DEG C, and furnace body is discharged
Flue gas in CO < 500mg/Nm3, NOx<200mg/Nm3, SO2<400mg/Nm3。
The burn-off rate of solid fuel reaches 95% in the present embodiment, and boiler thermal efficiency reaches 80%.
Embodiment 2
The present embodiment part provides a kind of grate firing boiler, as described in Figure 2, including bottom connection in the furnace body of grate firing boiler
First cavity and the second cavity；At the top of first cavity and/or side is equipped with coal filling hole 1, and first inside cavity is heat
Preheating zone is solved, the furnace wall side far from drum side is obliquely installed in the first cavity；Second inside cavity is provided with linear
Partition 2, the linear partition 2 are connected with the second cavity inner wall of first cavity and the interconnecting piece of second cavity,
The partition is pyrolytic gasification area close to the first cavity side, and the other side is coal-char combustion area；Drum is equipped at the top of second cavity
3, drum lower section is equipped with rear arch 4 in the furnace wall of the second cavity, between rear arch 4 and the first cavity and the interconnecting piece of the second cavity
Space be equipped with after-flame air port 5；
First cavity and the second cavity lower part are equipped with the first traveling-grate stoker 6, and the rear arch 4 is in first chain furnace
It arranges 6 tops and forms flue gas circulating area, first traveling-grate stoker 6 and first cavity, the partition 2 and described second
There are gaps between cavity；
5 air compartments 7 are set below first traveling-grate stoker；
The grate firing boiler is externally provided with blower 8；The blower 8 passes through the first pyrolysis tracheae 9 and the second pyrolysis tracheae respectively
10 are connected with the pyrolytic gasification area and close to the third air compartment 7 of the first cavity.
The processing method of the grate firing boiler the following steps are included:
(a) fuel is added from coal filling hole 1, carries out pyrolytic gasification after pyrolysis preheating, generate tar, pyrolysis gas and half
Coke, wherein the temperature for being pyrolyzed preheating is 350 DEG C, the temperature of pyrolytic gasification is 550 DEG C；
(b) pyrolysis gas that step (a) generates is pyrolyzed tracheae 9 by blower 8, first and the second pyrolysis tracheae 10 is transmitted to half
Burnt combustion zone, the tar and semicoke that step (a) generates enter coal-char combustion area by the first traveling-grate stoker 6, and successively through semicoke
Burning, after-flame and recuperation of heat are cooling, and obtained slag body discharge furnace body generates the flue gas generated in flue gas and step (a) in after-flame
Wind acts on the lower afterburnt, and furnace body is discharged, and wherein the temperature of coal-char combustion is 950 DEG C, and the temperature of after-flame is 800 DEG C, and furnace body is discharged
Flue gas in CO < 500mg/Nm3, NOx<200mg/Nm3, SO2<400mg/Nm3。
The burn-off rate of solid fuel reaches 96% in the present embodiment, and boiler thermal efficiency reaches 82%.
Embodiment 3
The present embodiment part provides a kind of grate firing boiler, and packet passes through region divides in the furnace body of the grate firing boiler
For the first cavity and the second cavity；Coal filling hole 1 is equipped at the top of first cavity, first inside cavity is pyrolysis preheating
Area；Second inside cavity is provided with fold-line-shaped partition 2, and the fold-line-shaped partition 2 is connected with region demarcation plate bottom,
The partition is pyrolytic gasification area close to the first cavity side, and the other side is coal-char combustion area；Drum is equipped at the top of second cavity
3, drum lower section is equipped with rear arch 4 in the furnace wall of the second cavity, between rear arch 4 and the first cavity and the interconnecting piece of the second cavity
Space be equipped with after-flame air port 5；
First cavity and the second cavity lower part are equipped with the first traveling-grate stoker 6, and the rear arch 4 is in first chain furnace
It arranges 6 tops and forms flue gas circulating area, first traveling-grate stoker 6 and first cavity, the partition 2 and described second
There are gaps between cavity；
5 air compartments 7 are set below first traveling-grate stoker；
The grate firing boiler is externally provided with blower 8；The blower 8 passes through the first pyrolysis tracheae 9 and the second pyrolysis tracheae respectively
10 are connected with the pyrolytic gasification area and close to the third air compartment 7 of the first cavity.
The processing method of the grate firing boiler the following steps are included:
(a) fuel is added from coal filling hole 1, carries out pyrolytic gasification after pyrolysis preheating, generate tar, pyrolysis gas and half
Coke, wherein the temperature for being pyrolyzed preheating is 380 DEG C, the temperature of pyrolytic gasification is 580 DEG C；
(b) pyrolysis gas that step (a) generates is pyrolyzed tracheae 9 by blower 8, first and the second pyrolysis tracheae 10 is transmitted to half
Burnt combustion zone, the tar and semicoke that step (a) generates enter coal-char combustion area by the first traveling-grate stoker 6, and successively through semicoke
Burning, after-flame and recuperation of heat are cooling, and obtained slag body discharge furnace body generates the flue gas generated in flue gas and step (a) in after-flame
Wind acts on the lower afterburnt, and furnace body is discharged, and wherein the temperature of coal-char combustion is 980 DEG C, and the temperature of after-flame is 850 DEG C, and furnace body is discharged
Flue gas in CO < 500mg/Nm3, NOx<200mg/Nm3, SO2<400mg/Nm3。
The burn-off rate of solid fuel reaches 95.8% in the present embodiment, and boiler thermal efficiency reaches 81.5%.
Embodiment 4
The present embodiment part provides a kind of grate firing boiler, the first chamber including bottom connection in the furnace body of the grate firing boiler
Body and the second cavity；At the top of first cavity and/or side is equipped with coal filling hole 1, and first inside cavity is pyrolysis preheating
Area；Second inside cavity is provided with arc line shaped partition 2, the arc line shaped partition 2 and first cavity and described second
First chamber outer wall of the interconnecting piece of cavity is connected, and the partition is pyrolytic gasification area close to the first cavity side, and the other side is
Coal-char combustion area；Drum 3 is equipped at the top of second cavity, drum lower section is equipped with rear arch 4 in the furnace wall of the second cavity, in rear arch 4
Space between the first cavity and the interconnecting piece of the second cavity is equipped with after-flame air port 5；
First cavity and the second cavity lower part are equipped with the first traveling-grate stoker 6, and the rear arch 4 is in first chain furnace
It arranges 6 tops and forms flue gas circulating area, second traveling-grate stoker, the second chain fire-gate operation are set above the first traveling-grate stoker 6
Length is not more than the width of the first cavity, and the first cavity is close to the side of drum, the partition 2 and second cavity and the
There are the gaps circulated for material between one traveling-grate stoker 4；
5 air compartments 7 are set below first traveling-grate stoker；
The grate firing boiler is externally provided with blower 8；The blower 8 passes through the first pyrolysis tracheae 9 and the second pyrolysis tracheae respectively
10 are connected with the pyrolytic gasification area and close to the third air compartment 7 of the first cavity.
The processing method of the grate firing boiler the following steps are included:
(a) fuel is added from coal filling hole 1, pyrolytic gasification is carried out by the second traveling-grate stoker 12 after pyrolysis preheating, is produced
Green coke oil, pyrolysis gas and semicoke, wherein the temperature for being pyrolyzed preheating is 400 DEG C, the temperature of pyrolytic gasification is 600 DEG C；
(b) pyrolysis gas that step (a) generates is pyrolyzed tracheae 9 by blower 8, first and the second pyrolysis tracheae 10 is transmitted to half
Burnt combustion zone, the tar and semicoke that step (a) generates enter coal-char combustion area by the first traveling-grate stoker 6, and successively through semicoke
Burning, after-flame and recuperation of heat are cooling, and obtained slag body discharge furnace body generates the flue gas generated in flue gas and step (a) in after-flame
Wind acts on the lower afterburnt, and furnace body is discharged, and wherein the temperature of coal-char combustion is 1000 DEG C, and the temperature of after-flame is 900 DEG C, and furnace body is discharged
Flue gas in CO < 500mg/Nm3, NOx<200mg/Nm3, SO2<400mg/Nm3。
The burn-off rate of solid fuel reaches 95.3% in the present embodiment, and boiler thermal efficiency reaches 81.1%.
Comparative example 1
This comparative example provides a kind of grate firing boiler, and referring to the structure in embodiment 1, difference exists the structure of the grate firing boiler
In, partition 2 is not provided in the second cavity, and be not provided with blower 8, first be pyrolyzed tracheae 9 and second pyrolysis tracheae 10.
NO in the flue gas of this comparative example boiler dischargexDischarge is greater than 300mg/Nm3, the burn-off rate of solid fuel is only 87%,
Boiler thermal efficiency is only 75%.
Comparative example 2
This comparative example provides a kind of grate firing boiler, and referring to the structure in embodiment 1, difference exists the structure of the grate firing boiler
In, be not provided with blower 8, first be pyrolyzed tracheae 9 and second pyrolysis tracheae 10.
NO in the flue gas of this comparative example boiler dischargexDischarge is greater than 300mg/Nm3, the burn-off rate of solid fuel is only 90%,
Boiler thermal efficiency is only 78%.
The Applicant declares that the present invention is explained by the above embodiments detailed construction feature of the invention, but the present invention is simultaneously
It is not limited to above-mentioned detailed construction feature, that is, does not mean that the present invention must rely on above-mentioned detailed construction feature and could implement.Institute
Belong to those skilled in the art it will be clearly understood that any improvement in the present invention, to the equivalence replacement of component selected by the present invention
And increase, selection of concrete mode of accessory etc., all of which fall within the scope of protection and disclosure of the present invention.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of grate firing boiler, which is characterized in that the first cavity including bottom connection in the furnace body of the grate firing boiler and the
Two cavitys；At the top of first cavity and/or side is equipped with coal filling hole, and first inside cavity is pyrolysis preheating zone；It is described
Second inside cavity is provided with partition, and the partition is connected with the interconnecting piece of first cavity and second cavity, described
Partition is pyrolytic gasification area close to the first cavity side, and the other side is coal-char combustion area；Drum, drum are equipped at the top of second cavity
Lower section is equipped with rear arch in the furnace wall of the second cavity, and the space between rear arch and the first cavity and the interconnecting piece of the second cavity is set
There is after-flame air port；
First cavity and the second cavity lower part are equipped with the first traveling-grate stoker, the sky between the rear arch and the first traveling-grate stoker
Between formed flue gas circulating area, between first traveling-grate stoker and first cavity, the partition and second cavity
There are gaps；
At least two air compartment is set below first traveling-grate stoker；
The grate firing boiler is externally provided with charge delivery mechanism；Pipeline in the charge delivery mechanism respectively with the pyrolytic gasification
Area is connected with the coal-char combustion area.
2. grate firing boiler according to claim 1, which is characterized in that the charge delivery mechanism includes blower, connects wind
First pyrolysis tracheae of machine and pyrolytic gasification area, and the second pyrolysis tracheae of connection blower and coal-char combustion area lower section air compartment；
Preferably, the pyrolysis gas that pyrolytic gasification area generates is transmitted to the coal-char combustion area by the charge delivery mechanism.
3. grate firing boiler according to claim 1 or 2, which is characterized in that be arranged extremely below first traveling-grate stoker
Few 2 air compartments are set gradually along the first traveling-grate stoker, and preferably 5 air compartments are set gradually along the first traveling-grate stoker.
4. grate firing boiler according to claim 1-3, which is characterized in that below the first cavity of Yu Suoshu, first
Second traveling-grate stoker is set above traveling-grate stoker；
Preferably, the described second chain fire-gate running length is not more than the width of the first cavity.
5. grate firing boiler according to claim 1-4, which is characterized in that the furnace wall inclination of first cavity is set
It sets, and is connected with the first traveling-grate stoker.
6. a kind of processing method of grate firing boiler as described in any one in claim 1-5, which is characterized in that the method includes
Following steps:
(a) fuel is added from coal filling hole, carries out pyrolytic gasification after pyrolysis preheating, generates tar, pyrolysis gas and semicoke；
(b) pyrolysis gas that step (a) generates is transmitted to coal-char combustion area, the tar that step (a) generates by charge delivery mechanism
Coal-char combustion area is entered by the first traveling-grate stoker with semicoke, and successively cooling through coal-char combustion, after-flame and recuperation of heat, obtained
Furnace body is discharged in slag body, generates the flue gas generated in flue gas and step (a) afterburnt under burnout degree effect, furnace body is discharged.
7. processing method according to claim 6, which is characterized in that step (a) fuel is for solid fuel and/or admittedly
The mixture of fluid fuel and desulfurizing agent；
Preferably, step (a) the fuel clean moulded coal；
Preferably, the temperature of step (a) the pyrolysis preheating is 300-400 DEG C.
8. processing method according to claim 6 or 7, which is characterized in that the temperature of step (a) pyrolytic gasification is
500-600℃。
9. according to the described in any item processing methods of claim 6-8, which is characterized in that the temperature of step (b) coal-char combustion
Degree is 900-1000 DEG C；
Preferably, the temperature of step (b) after-flame is 700-900 DEG C；
Preferably, CO < 500mg/Nm in the flue gas of furnace body is discharged in step (b)3, NOx<200mg/Nm3, SO2<400mg/Nm3。
10. telling the processing method of Sohu according to any one of claim 6-9, which is characterized in that the described method comprises the following steps:
(a) fuel is added from coal filling hole, carries out pyrolytic gasification in the case where pyrolysis preheats rear bearing, generates tar, pyrolysis gas and semicoke,
The temperature for being wherein pyrolyzed preheating is 300-400 DEG C, and the temperature of pyrolytic gasification is 500-600；
(b) pyrolysis gas that step (a) generates is transmitted to coal-char combustion area, the tar that step (a) generates by charge delivery mechanism
Coal-char combustion area is entered by the first traveling-grate stoker with semicoke, and successively cooling through coal-char combustion, after-flame and recuperation of heat, obtained
Furnace body is discharged in slag body, generates the flue gas generated in flue gas and step (a) afterburnt under burnout degree effect, furnace body is discharged, wherein
The temperature of coal-char combustion is 900-1000 DEG C, and the temperature of after-flame is 700-900 DEG C, and CO < 500mg/ in the flue gas of furnace body is discharged
Nm3, NOx<200mg/Nm3, SO2<400mg/Nm3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811407763.2A CN109539241A (en) | 2018-11-23 | 2018-11-23 | A kind of environmental protection flue gas circulation layer combusting boiler and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811407763.2A CN109539241A (en) | 2018-11-23 | 2018-11-23 | A kind of environmental protection flue gas circulation layer combusting boiler and its processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109539241A true CN109539241A (en) | 2019-03-29 |
Family
ID=65849420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811407763.2A Pending CN109539241A (en) | 2018-11-23 | 2018-11-23 | A kind of environmental protection flue gas circulation layer combusting boiler and its processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109539241A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686276A (en) * | 2019-10-31 | 2020-01-14 | 兖矿集团有限公司 | Graded combustion normal-pressure hot water stove and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86208859U (en) * | 1986-10-23 | 1987-09-23 | 邵阳锅炉厂 | Front smoke-exhausting device for mechanical grate-firing grate |
| CN1945116A (en) * | 2006-09-05 | 2007-04-11 | 汕头市联美投资(集团)有限公司 | Circulation fixing bed split phase combustion technology |
| CN101893234A (en) * | 2010-07-29 | 2010-11-24 | 哈尔滨工业大学 | Biomass boiler capable of realizing combined combustion of synthesis gas and semicoke |
| CN102563614A (en) * | 2010-11-01 | 2012-07-11 | 中国科学院过程工程研究所 | Pre-combustion mechanical grate decoupling combustion furnace and combustion method for same |
| CN105864748A (en) * | 2016-04-19 | 2016-08-17 | 上海理工大学 | Combined combustion system of chain boiler |
-
2018
- 2018-11-23 CN CN201811407763.2A patent/CN109539241A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86208859U (en) * | 1986-10-23 | 1987-09-23 | 邵阳锅炉厂 | Front smoke-exhausting device for mechanical grate-firing grate |
| CN1945116A (en) * | 2006-09-05 | 2007-04-11 | 汕头市联美投资(集团)有限公司 | Circulation fixing bed split phase combustion technology |
| CN101893234A (en) * | 2010-07-29 | 2010-11-24 | 哈尔滨工业大学 | Biomass boiler capable of realizing combined combustion of synthesis gas and semicoke |
| CN102563614A (en) * | 2010-11-01 | 2012-07-11 | 中国科学院过程工程研究所 | Pre-combustion mechanical grate decoupling combustion furnace and combustion method for same |
| CN105864748A (en) * | 2016-04-19 | 2016-08-17 | 上海理工大学 | Combined combustion system of chain boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686276A (en) * | 2019-10-31 | 2020-01-14 | 兖矿集团有限公司 | Graded combustion normal-pressure hot water stove and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101650025B (en) | Decoupling combustion furnace and decoupling combustion method | |
| CN106122945A (en) | A kind of low-NOx coal powder system and method | |
| CN106352343A (en) | Gasifying incinerator applicable to household garbage with high heat value | |
| CN104654265A (en) | Ultralow-emission nitrogen oxide biomass chain boiler | |
| CN104566338A (en) | Hearth structure of biomass chain boiler | |
| CN210463572U (en) | Semi-gasification biomass combustion hot blast stove | |
| CN204534517U (en) | Minimum discharge nitrogen oxide living beings chain-grate boiler | |
| CN109539241A (en) | A kind of environmental protection flue gas circulation layer combusting boiler and its processing method | |
| CN101569829B (en) | Method for jointly controlling emission of NOx by utilizing multi-stage bias combustion and fuel reburning | |
| CN105650618A (en) | Water gas production and combustion integrated combustion method and equipment | |
| CN207094608U (en) | W burning boilers, which mix fired biomass gas, reduces NOx arrangement | |
| CN109751592A (en) | A kind of industrial coal layer burner mixes the System and method for of burning semicoke | |
| CN109578975A (en) | A kind of coal-burning boiler and its processing method of fractional combustion | |
| CN205746815U (en) | Low-NOx coal powder system | |
| CN215062007U (en) | Chain grate combustion device with hot air pipe for passive material turning | |
| CN109578976A (en) | A kind of energy-saving and environment-friendly grate firing boiler for being applicable in solid fuel and its processing method | |
| CN211204051U (en) | Domestic waste burns grate furnace | |
| CN109578977B (en) | Environment-friendly coal-fired boiler capable of independently controlling pyrolysis gasification and semicoke combustion and treatment method thereof | |
| CN106838879A (en) | A kind of biomass bundling fuel chain-grate boiler | |
| CN108361684B (en) | High-temperature smokeless boiler and combustion method | |
| CN111765475A (en) | Circulating fluidized bed waste incineration boiler based on fire grate and working method thereof | |
| CN106051777A (en) | Porous medium combustion device for garbage pyrolysis | |
| CN207230527U (en) | A kind of low nitrogen combustion apparatus of coal dust gasification burning | |
| CN100375860C (en) | Multi-side stereo combustion boiler capable of realizing clean combustion of coal and combustion method thereof | |
| RU2648314C2 (en) | Boiler with chamber 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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190329 |