CN209909918U - Waste incineration boiler system - Google Patents
Waste incineration boiler system Download PDFInfo
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- CN209909918U CN209909918U CN201920593432.6U CN201920593432U CN209909918U CN 209909918 U CN209909918 U CN 209909918U CN 201920593432 U CN201920593432 U CN 201920593432U CN 209909918 U CN209909918 U CN 209909918U
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Abstract
The utility model discloses a msw incineration boiler system, including burning furnace, exhaust-heat boiler, overgrate air device and flue gas denitrification device, through setting up the oxygen supply volume when overgrate air device, overgrate air device increase burn, restrain NOx's bulk production in the dense phase district, set up denitrification facility simultaneously, carry out denitration treatment to the flue gas in the dilute phase district to adopted the layering mode during the denitration, increased the denitration region, reduced NOx's emission.
Description
Technical Field
The utility model belongs to the technical field of msw incineration's technique and specifically relates to a msw incineration boiler system is related to.
Background
Domestic waste is mainly handled through burning, and waste incineration is often used in the electricity generation, can a large amount of nitrogen oxide (NOx) in the burning process, and nitrogen oxide is common atmospheric pollutants, consequently need carry out denitration treatment before discharging.
Selective non-catalytic reduction (SNCR) and Selective Catalytic Reduction (SCR) are common in current denitration methods, and for example, patent publication No. CN104154543A discloses "an SNCR denitration method" in which a plurality of injection devices are provided in an incinerator, and a reducing agent is injected into a boiler by the injection devices to cause a reduction reaction with nitrogen oxides, thereby reducing the amount of nitrogen oxides during emission. However, the denitration rate of the SNCR denitration method is less than or equal to 50%, the denitration effect is not ideal, and the discharge amount of nitrogen oxides is still large.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a waste incineration boiler system can realize lower nitrogen oxide's emission.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a waste incineration boiler system, comprising:
the incinerator comprises a hearth, a grate positioned below the hearth and a feed hopper communicated with the hearth, wherein the grate comprises a plurality of adjacent grate sections;
the waste heat boiler is connected with the incinerator, and a flue communicated with the hearth is arranged in the waste heat boiler;
the primary air device comprises primary fans of which the number is the same as that of the grate sections and first air pipes connected with the primary fans, and one end of each first air pipe is connected with the grate sections;
the secondary air device comprises a secondary air fan and at least one second air pipe connected with the secondary air fan, and one end of the second air pipe extends into the hearth;
the flue gas denitration device comprises a storage tank containing ammonia water, a water pump connected with the storage tank and an injection mechanism connected with the water pump through a main pipeline, wherein the injection mechanism comprises a first branch pipe and a second branch pipe which are arranged in a layered mode in the height direction of the waste heat boiler, a first injection assembly is arranged on the first branch pipe, a second injection assembly is arranged on the second branch pipe, and the first injection assembly and the second injection assembly both extend into a flue;
wherein the first air pipe leads the excess air coefficient a of primary air in the fire grate section1The excess air coefficient a is less than the secondary air introduced into the hearth by the second air pipe2，a2Greater than 1.
By adopting the technical scheme, the household garbage is thrown from the feed hopper of the incinerator and finally falls into the fire grate for incineration, primary air is introduced into the fire grate section by using the primary air device during the garbage incineration, and secondary air is introduced into the hearth by using the secondary air device, so that sufficient oxygen is provided for the incineration, the garbage can be fully combusted, and the generation of NOx is inhibited; meanwhile, a dense-phase area is arranged below an air inlet of secondary air, and due to the set excess air coefficient a of the primary air1Is less than the excess air factor a of the secondary air2So that more oxygen is brought in by secondary air, the reducing atmosphere in the dense-phase zone has stronger inhibiting effect on the generation of NOx, and the excess air coefficient a2The combustion efficiency is higher than 1, so that the fuel in the hearth can be completely burnt out, and the combustion can be more sufficient; at last by burning in the flue of the flue gas that produces, utilize injection mechanism to spout into reductant (aqueous ammonia) in to the flue, utilize ammonia and NOx to take place reduction reaction, for promoting reduction effect, the direction of height along the flue has set up first branch pipe and second branch pipe, install first injection subassembly on first branch pipe and install the second injection subassembly on the second branch pipe and all spray the reductant to the flue in, and then form two reduction layers, and form a reducing zone again between two reduction layers, reaction range when increasing the flue gas denitration, improve the denitration effect, and then finally realize lower nitrogen oxide's emission.
Preferably, the first spraying component comprises a plurality of first nozzles which are arranged in an opposite and crossed manner, and the second spraying component comprises a plurality of second nozzles which are arranged in an opposite and crossed manner.
Through adopting above-mentioned technical scheme, the mode of arranging of first nozzle and second nozzle for the reductant that sprays out can cover the width great on the horizontal aspect in the flue, and then has realized that reductant distributes comparatively evenly on the same reduction layer, can be better carry out abundant reaction with NOx, better promotion denitration effect.
Preferably, a plurality of first nozzles and second nozzles on the same vertical plane are arranged to intersect with each other.
Through adopting above-mentioned technical scheme, the cross arrangement of a plurality of first nozzles and second nozzle on the vertical plane realizes the complementation of reductant, and the complementation of the reductant on the cooperation horizontal plane has wholly promoted the evenly distributed of reductant in the exhaust-heat boiler, promotes the denitration effect.
Preferably, the first nozzle is parallel to the axis of the spout of the second nozzle, wherein the axis of the spout forms an angle of 45 ~ 70 ° with the vertical plane.
Through adopting above-mentioned technical scheme, the slope setting of first nozzle and second nozzle, can be better with the flue gas of the in-process that rises directly mix, when the angle of inclination was spent, lead to central zone reductant too little easily, when the angle of inclination was too big, the reductant of exhaust-heat boiler lower floor was too little, reduces the regional scope of reaction.
Preferably, the first branch pipe and the second branch pipe have a vertical distance of 1 ~ 1.5.5 meters.
Through adopting above-mentioned technical scheme, the interval setting between first branch pipe and the second branch pipe for the flue gas has certain interval time when two reduction layers that form, and then can be comparatively abundant carry out twice reduction, improves the denitration effect.
Preferably, the waste heat boiler comprises a first boiler body and a second boiler body which are communicated, and the injection mechanism is arranged on the first boiler body; wherein, the flue is including offering the first flue in the first furnace body and the horizontal flue of the first flue of intercommunication, first flue and furnace intercommunication, horizontal flue and second furnace body intercommunication, first injection subassembly and second injection subassembly all extend to in the first flue.
Through adopting above-mentioned technical scheme, set up first furnace body and second furnace body with exhaust-heat boiler, increased the flue length in the whole boiler, partial reductant can be along with the flow of flue gas in scattering first furnace body and the second furnace body, has increased the reaction time between NOx in the flue gas and the reductant, improves the denitration effect.
Preferably, a flow baffle is arranged in the second furnace body along the height direction, a second flue and a third flue which are communicated are respectively formed on two sides of the flow baffle, the horizontal flue is communicated with the second flue, and the third flue is provided with a smoke outlet.
Through adopting above-mentioned technical scheme, keep off the setting of flowing the board and separate into second flue and third flue with the second furnace body, the better distance that increases the flue gas flow, the better improvement denitration reaction is long when.
Preferably, the hearth is also communicated with a slag discharge channel, and one end of the slag discharge channel is provided with a slag pit; the bottom of second furnace body is provided with water-cooling screw conveyer, water-cooling screw conveyer is connected with the row's sediment pipe with the slag pit intercommunication, be provided with vibrating motor on the row's sediment pipe.
By adopting the technical scheme, the slag ash after the domestic garbage is burnt out can fall into the slag discharge channel and is finally collected in the slag pit; in addition, partial slag ash is discharged from the bottom of second furnace body when the flue gas carries out the denitration in the flue, utilize water-cooling screw conveyer to take the slag ash out to arrange the sediment intraductal, water-cooling screw conveyer is applicable to powdered material and carries, can effectually carry the slag ash, the slag ash is carried to the calandria in the back finally also retrieve the slag hole in, utilize vibrating motor's setting simultaneously, the effect of arranging the sediment has been improved, and the slag ash has been solved and has been arranged the intraductal adnexed condition of sediment.
Preferably, the air inlet end of the primary air device is further connected with a preheating device, the preheating device comprises a main air pipe and at least one steam pipe which are connected in parallel, the first air pipe is connected with the main air pipe, the main air pipe is provided with at least one preheater, and the steam pipe is connected with the preheater.
Through adopting above-mentioned technical scheme, preheating device's setting makes the wind possess certain temperature, plays the effect to dry fuel, has improved the utilization ratio of energy.
Preferably, an ignition burner and an auxiliary burner are arranged in the hearth, and the auxiliary burner is connected with an auxiliary fan through an auxiliary air inlet pipe.
Through adopting above-mentioned technical scheme, utilize ignition burner and supplementary combustor quick mix the air and the buggy in the furnace to ignite, supplementary fan on the supplementary combustor mixes combustion-supporting air with the oil mist continuously simultaneously, stability and abundant burning when doing benefit to the burning.
To sum up, the utility model discloses a beneficial technological effect does:
1. the primary air device and the secondary air device are arranged to increase oxygen supply during incineration, mass production of NOx in the dense-phase region is inhibited, the denitration device is arranged to perform denitration treatment on flue gas in the dilute-phase region, and a layering mode is adopted during denitration, so that a denitration region is enlarged, and NOx emission is reduced;
2. the first nozzles and the second spray groups are combined in a crossed manner on the same horizontal plane in a crossed manner in the vertical direction, so that the uniform distribution of a reducing agent in the waste heat boiler is improved, the denitration effect is better improved, and the emission of NOx is reduced;
3. the first branch pipe and the second branch pipe are set to have a certain height difference, and the nozzles of the first nozzle and the second nozzle are obliquely arranged according to a certain angle, so that the range of a reduction zone in a flue is enlarged, the denitration efficiency is better improved, and the emission of NOx is reduced;
4. through setting up crooked first to third flue in with exhaust-heat boiler, increase the flow time of flue gas in exhaust-heat boiler, and then can increase the reaction of denitration, improve denitration efficiency, reduce NOx's emission.
Drawings
FIG. 1 is a schematic diagram of a waste incineration boiler system;
FIG. 2 is a front view of the injection mechanism as it is connected to the first furnace body;
FIG. 3 is a rear view of the injection mechanism as it is connected to the first furnace body;
FIG. 4 is a schematic view of the distribution of the first jetting assemblies on the first leg;
FIG. 5 is a schematic diagram of the distribution of the second jetting assemblies on the second branch pipe;
fig. 6 is a schematic view of the spray assembly mainly showing the arrangement of the first nozzle and the second nozzle in the first furnace body.
In the figure, 10, an incinerator; 11. a hearth; 12. a grate; 121. a grate section; 13. a feed hopper; 14. an ignition burner; 15. an auxiliary burner; 16. an auxiliary fan; 17. an auxiliary air duct; 18. a slag discharge channel; 20. a waste heat boiler; 21. a first furnace body; 211. a first flue; 212. a horizontal flue; 22. a second furnace body; 221. a flow baffle plate; 222. a second flue; 223. a third flue; 224. a smoke outlet; 30. a primary air device; 31. a primary air fan; 32. a first air duct; 33. a main air duct; 34. a steam pipe; 35. a preheater; 40. a secondary air device; 41. a second air duct; 42. a secondary air fan; 50. a flue gas denitration device; 51. a storage tank; 52. a water pump; 53. a main pipeline; 54. an injection mechanism; 541. a first branch pipe; 5411. a first nozzle; 542. a second branch pipe; 5421. a second nozzle; 55. a process water pipeline; 56. a compressed air conduit; 60. a water-cooled screw conveyor; 61. a slag discharge pipe; 62. a vibration motor; 70. and (7) a slag pit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a waste incineration boiler system includes an incinerator 10, a primary air device 30, a secondary air device 40, a waste heat boiler 20, and a flue gas denitration device 50. The primary air device 30 and the secondary air device 40 are both connected to the incinerator 10, the primary air device 30 provides primary air into the incinerator 10, and the secondary air device 40 provides secondary air into the incinerator 10.
The incinerator 10 in this embodiment is a grate 12 incinerator 10, and includes a hearth 11, a grate 12 located below the hearth 11, and a feed hopper 13 communicated with the hearth 11. The grate 12 includes a plurality of grate segments 121 arranged adjacently, and the primary air device 30 is connected to the grate segments 121 and supplies primary air into the grate segments 121. The feed inlet of the feed hopper 13 is opened upwards, and the garbage is thrown into the hearth 11 from the feed hopper 13 and is incinerated on the grate 12.
Still be provided with ignition combustor 14 and supplementary combustor 15 in furnace 11, wherein, ignition combustor 14 sets up in the lateral wall department of furnace 11, and supplementary combustor 15 sets up the throat region, and ignition combustor 14 and supplementary combustor 15 are equallyd divide and are provided with two respectively, and supplementary combustor 15 still is connected with auxiliary air fan 16 through auxiliary air pipe 17, utilizes auxiliary air fan 16 to provide oxygen in the supplementary combustor 15.
The hearth 11 is also communicated with a slag discharge channel 18, the grate 12 is provided with a discharge piece which inclines towards one side of the slag discharge channel 18, the bottom of the slag discharge channel 18 is connected with a slag pit 70, and slag ash after garbage is burnt out is collected in the slag pit 70 by the slag discharge channel 18.
The primary air device 30 includes a plurality of primary air fans 31 with the same number as the fire grate sections 121, and in the present embodiment, five primary air fans 31 are provided, which correspond to the five fire grate sections 121 respectively. Each primary air fan 31 is connected with a first air pipe 32, each first air pipe 32 is correspondingly connected with one of the furnace grate sections 121, the connection position is located in the lower area of the furnace grate section 121, and primary air blows from the lower part of the furnace grate section 121 towards one side of the hearth 11.
The primary air device 30 further comprises a preheating device connected to the upstream of the primary air fan 31, and the preheating device comprises a main air pipe 33 and two steam pipes 34 which are arranged in parallel, and all the first air pipes 32 are connected with the main air pipe 33. Two preheaters 35 are further arranged on the main air pipe 33 in series, and each steam pipe 34 is connected with one of the preheaters 35.
The secondary air device 40 includes a secondary air fan 42 and two second air ducts 41 connected to the secondary air fan 42, and the two second air ducts 41 respectively extend to the throat of the furnace 11 and are higher than the auxiliary burner 15. Wherein, when the primary air device 30 and the secondary air device 40 supply air, the total air volume of the whole system is unchanged, and the excess air coefficient delivered into the fire grate 12 by the primary air device 30 is defined as a1The excess air supplied from the overfire air device 40 into the furnace 11 has a coefficient of a2The excess air ratio is a2Is greater than 1 and has an excess air ratio of a2Greater than the air excess coefficient of a1Preferably, the air excess factor is a21.1 to 1.2.
The waste heat boiler 20 is connected with the incinerator 10, and comprises a first furnace body 21 and a second furnace body 22 which are connected, a first flue 211 is arranged in the first furnace body 21, the first flue 211 is communicated with the hearth 11, and the incinerated flue gas firstly enters the first flue 211 from the hearth 11.
A baffle plate 221 is arranged in the second furnace body 22 along the height direction, the baffle plate 221 divides the first furnace body 21 into a second flue 222 and a third flue 223, the first flue 211 is communicated with the second flue 222 through a horizontal flue 212, the first flue 211, the horizontal flue 212, the second flue 222 and the third flue 223 are distributed according to an S shape, and one end of the third flue 223 is provided with a smoke outlet 224.
The lower end of the second furnace body 22 is provided with a discharge hole which is connected with a water-cooling screw conveyor 60, the water-cooling screw conveyor 60 is connected with a slag discharge pipe 61, and the slag discharge pipe 61 is introduced into the slag pit 70. Meanwhile, the slag discharge pipe 61 is also provided with a vibration motor 62.
The flue gas denitration device 50 includes a storage tank 51 containing ammonia water, a water pump 52 connected to the storage tank 51, and an injection mechanism 54 connected to the water pump 52. In the embodiment, ammonia water is used as a reducing agent, a main pipe 53 is connected to a water outlet of the water pump 52, and the injection mechanism 54 is connected with the main pipe 53.
The main pipe 53 is also communicated with a process water pipe 55 and a compressed air pipe 56, and the process water pipe 55 and the compressed air pipe 56 can be controlled by a stop valve to open and close the pipes.
The spraying mechanism 54 comprises two first branch pipes 541 and second branch pipes 542 which are arranged in layers, the first branch pipes 541 and the second branch pipes 542 are enclosed at the outer wall of the first furnace body 21, and the arrangement position is higher than the arrangement position of the second air duct 41, the first branch pipes 541 and the second branch pipes 542 have a distance H, and the distance H is between 1 ~ 1.5 and 1.5 meters, and is preferably 1.3 meters.
Referring to fig. 2 and 3 together, a first spraying assembly is disposed on the first branch pipe 541, a second spraying assembly is disposed on the second branch pipe 542, the first spraying assembly includes a plurality of first nozzles 5411, the second spraying assembly includes a plurality of second nozzles 5421, in this embodiment, eight first nozzles 5411 are disposed, and five second nozzles 5421 are disposed, wherein four first nozzles 5411 are disposed on two horizontal pipes of the first branch pipe 541 respectively, two second nozzles 5421 and three second nozzles 5411 are disposed on two horizontal pipes of the second branch pipe 542 respectively, and the first nozzles 5411 and the second nozzles 5421 are arranged in a mutually crossing manner on the same vertical plane.
Referring to fig. 4 and 5 together, a plurality of first nozzles 5411 are arranged to cross each other and a plurality of second nozzles 5421 are arranged to cross each other on the same horizontal plane.
Referring to fig. 6, the spout axes of the first and second nozzles 5411 and 5421 are parallel to each other with the spouts each extending into the first furnace body 21 at an angle a of between 45 ~ 70 ° to the vertical plane L, preferably 60 °.
When the system works, the garbage is lifted to gradually throw the garbage into the feed hopper 13, the garbage gradually falls into the hearth 11, the ignition burner 14 works to ignite and burn the garbage, the primary air device 30 provides pulverized coal and partial oxygen into the grate 12, and simultaneously any preheater 35 is used for heating primary air to dry the pulverized coal or fuel. The overfire air device 40 further operates to provide sufficient oxygen to the furnace 11 and to increase the reducibility in the dense phase zone.
In burning gradual entering into first flue 211 of in-process flue gas, flue gas denitrification facility 50 during operation, the aqueous ammonia in storage tank 51 is beaten to trunk line 53 in the water pump 52 will splendid attire, and shunt to first branch pipe 541 and second branch pipe 542 on, spray the aqueous ammonia to first flue 211 in finally following a plurality of first nozzles 5411 and second nozzle 5421, form a reduction zone in first flue 211 simultaneously, the reduction reaction takes place for flue gas and aqueous ammonia, the theory of reaction equation is as follows:
4NH3+4NO+O 2→4N 2+6H 2O；
4NH 3+2NO+2O 2→3N 2 +6H 2 O；
8NH 3 +6NO 2 →7N 2 +12H 2 O。
the reduced flue gas continuously flows in the waste heat boiler 20 and sequentially passes through the horizontal flue 212, the second flue 222 and the third flue 223, and because the temperature in the waste heat boiler 20 is high, ammonia gas is formed by vaporization of ammonia water and is mixed with the flue gas, so that the reduction reaction is performed in the whole waste heat boiler 20, and finally the ammonia gas is discharged from the smoke outlet 224 or enters one device for continuous treatment.
In the denitration injection process, the process water pipeline 55 can be opened to adjust the concentration of the ammonia water; after the incineration is completed, the process water pipeline 55 may also be continuously supplied with water to clean the main pipeline 53 and the first and second branch pipes 541 and 542, and the same compressed air pipeline 56 may supply compressed air to blow dry the pipelines. The second furnace body 22 can also carry out slag discharge, and slag ash is conveyed into the slag discharge by the water-cooling screw conveyor 60 through opening the discharge hole at the bottom, and is conveyed into the slag pit 70 to be recovered under the auxiliary action of the vibration motor 62.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (10)
1. A waste incineration boiler system, comprising:
the incinerator (10) comprises a hearth (11), a grate (12) positioned below the hearth (11) and a feed hopper (13) communicated with the hearth (11), wherein the grate (12) comprises a plurality of adjacent grate sections (121);
the waste heat boiler (20) is connected with the incinerator (10), and a flue communicated with the hearth (11) is formed in the waste heat boiler (20);
the primary air device (30) comprises primary air fans (31) with the same number as the grate sections (121) and first air pipes (32) connected with the primary air fans (31), and one ends of the first air pipes (32) are connected with the grate sections (121);
the secondary air device (40) comprises a secondary air fan (42) and at least one second air pipe (41) connected with the secondary air fan (42), and one end of the second air pipe (41) extends into the hearth (11);
the flue gas denitration device (50) comprises a storage tank (51) containing ammonia water, a water pump (52) connected with the storage tank (51) and an injection mechanism (54) connected with the water pump (52) through a main pipeline (53), wherein the injection mechanism (54) comprises a first branch pipe (541) and a second branch pipe (542) which are arranged in a layered mode in the height direction of the waste heat boiler (20), a first injection assembly is arranged on the first branch pipe (541), a second injection assembly is arranged on the second branch pipe (542), and the first injection assembly and the second injection assembly both extend into a flue;
wherein the first air pipe (32) leads the excess air coefficient a of the primary air which is introduced into the fire grate section (121)1The excess air coefficient a is less than the secondary air introduced into the hearth (11) by the second air pipe (41)2，a2Greater than 1.
2. A waste incineration boiler system according to claim 1, wherein the first injection assembly comprises a plurality of first nozzles (5411) arranged in opposite and intersecting directions, and the second injection assembly comprises a plurality of second nozzles (5421) arranged in opposite and intersecting directions.
3. A waste incineration boiler system according to claim 2, characterised in that several first nozzles (5411) and second nozzles (5421) in the same vertical plane are arranged crosswise to each other.
4. A waste incineration boiler system according to claim 2, wherein the first nozzle (5411) is parallel to the spout axis of the second nozzle (5421), wherein the spout axis is at an angle of 45 ~ 70 ° to the vertical plane.
5. A waste incineration boiler system according to claim 1, characterised in that the first branch pipe (541) and the second branch pipe (542) have a vertical distance of 1 ~ 1.5.5 metres between them.
6. A waste incineration boiler system according to claim 1, wherein the waste heat boiler (20) comprises a first body (21) and a second body (22) which are communicated with each other, the injection mechanism (54) is arranged on the first body (21); the flue comprises a first flue (211) arranged in the first furnace body (21) and a horizontal flue (212) communicated with the first flue (211), the first flue (211) is communicated with the hearth (11), the horizontal flue (212) is communicated with the second furnace body (22), and the first injection assembly and the second injection assembly both extend into the first flue (211).
7. A waste incineration boiler system according to claim 6, wherein a flow baffle plate (221) is arranged in the second furnace body (22) along the height direction, a second flue (222) and a third flue (223) which are communicated with each other are respectively formed at two sides of the flow baffle plate (221), the horizontal flue (212) is communicated with the second flue (222), and the third flue (223) is provided with a smoke outlet (224).
8. A waste incineration boiler system according to claim 7, characterized in that the furnace (11) is further communicated with a slag discharge channel (18), and one end of the slag discharge channel (18) is provided with a slag pit (70); the bottom of second furnace body (22) is provided with water-cooling screw conveyer (60), water-cooling screw conveyer (60) are connected with row's cinder pipe (61) with slag pit (70) intercommunication, be provided with vibrating motor (62) on row's cinder pipe (61).
9. A waste incineration boiler system according to claim 1, wherein the air inlet end of the primary air device (30) is further connected with a preheating device, the preheating device comprises a main air pipe (33) and at least one steam pipe (34) which are connected in parallel, the first air pipe (32) is connected with the main air pipe (33), the main air pipe (33) is provided with at least one preheater (35), and the steam pipe (34) is connected with the preheater (35).
10. A waste incineration boiler system according to claim 1, characterised in that an ignition burner (14) and an auxiliary burner (15) are arranged in the furnace (11), and the auxiliary burner (15) is connected with an auxiliary fan (16) through an auxiliary air inlet pipe.
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| CN201920593432.6U CN209909918U (en) | 2019-04-27 | 2019-04-27 | Waste incineration boiler system |
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