CN105318536A - Single-boiler-barrel transversely-arranging type reciprocating grate spraying and denitration corner-tube boiler - Google Patents

Single-boiler-barrel transversely-arranging type reciprocating grate spraying and denitration corner-tube boiler Download PDF

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Publication number
CN105318536A
CN105318536A CN201410378220.8A CN201410378220A CN105318536A CN 105318536 A CN105318536 A CN 105318536A CN 201410378220 A CN201410378220 A CN 201410378220A CN 105318536 A CN105318536 A CN 105318536A
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boiler
water
denitration
cooling
arch
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CN201410378220.8A
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CN105318536B (en
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孙伟东
张显辉
楚光临
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HARBIN SIFANG BOILER Co Ltd
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HARBIN SIFANG BOILER Co Ltd
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Abstract

The invention relates to a single-boiler-barrel transversely-arranging type reciprocating grate spraying and denitration corner-tube boiler. The single-boiler-barrel transversely-arranging type reciprocating grate spraying and denitration corner-tube boiler comprises a boiler body and a reciprocating grate part, wherein the reciprocating grate part is arranged at the bottom of the boiler body; the single-boiler-barrel transversely-arranging type reciprocating grate spraying and denitration corner-tube boiler is characterized in that the boiler body 1 is provided with a broiler water circulating mechanism and is composed of a channel rear-wall water cooling wall 30, and an upper collection box 18 and a lower collection box 33 of a deposition chamber; the boiler body 1 is provided with a spraying and denitration cyclone separation sedimentation device which is composed of a denitration and spraying pipe 28, a denitration nozzle 24, a denitration agent supplying device 35, an upper sedimentation separation chamber 21 and a lower sedimentation separation chamber 29. The single-boiler-barrel transversely-arranging type reciprocating grate spraying and denitration corner-tube boiler has the characteristics that the emission of nitric oxide is reduced, the air pollution is reduced, the heat efficiency is improved, the energy is saved and the boiler is environmentally friendly and safe and the like.

Description

A kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler
technical field
The present invention relates to boiler technology field, particularly can meet the emission request of national emission standard of air pollutants for boilers, solve discharged nitrous oxides concentration high, a kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler of contaminated environment.
background technology
As everyone knows, current corner tube boiler structure arranges around boiler body that four down-comers be not heated are as support.Furnace outlet flue gas directly washes away Flag pattern heat surface coiled pipe, and serious wear does not have expansion chamber, and dust can not sedimentation, and heating surface is few, and service life is low, and maintenance rate is high, increases use cost.Along with national environmental protection policy is increasingly strict, known corner tube boiler can not meet the emission request of country about emission standard of air pollutants for boilers, and discharged nitrous oxides concentration is high, contaminated environment.Therefore, how to solve boiler and do not have expansion chamber and ash fall, and it is little to solve heating surface area, furnace outlet flue gas does not directly wash away Flag pattern heat surface coiled pipe, reduce wear, prolonged boiler service life, reduce maintenance frequency, reduce use cost, in addition, solve Denitration in Boiler, reduce discharged nitrous oxides, energy-conserving and environment-protective etc. have become problem in the urgent need to address at present.
summary of the invention
The object of the invention is: improve for the ubiquitous problem of prior art, overcome shortcomings and deficiencies of the prior art, there is provided a kind of with expansion chamber, reduce the discharge of nitrogen oxide, improve a kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler of boiler thermal output.
The technical solution adopted for the present invention to solve the technical problems is: a kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler, comprise boiler furnace part, reciprocal grate part, boiler furnace part comprises boiler body 1, four of the setting of boiler body 1 surrounding vertical have side wall down-comer 5 and the rear arch feed pipe 27 of supporting role, at the drum 3 that boiler body 1 upper left is arranged, the water inlet pipe 2 be communicated with drum 3, Flag pattern heat surface feed pipe 14, face arch down-comer 4, and down-comer 26 and last time water pipe 15, side water wall 6, burner hearth 7, face arch water-cooling wall 8, face arch lower header 9, side wall lower header 10, side water wall upper collecting chamber 16, front and back arch upper collecting chamber 17, outlet pipe 19, Flag pattern heat surface upper collecting chamber 20 ,flag pattern heat surface pipe 22, exhanst gas outlet 23, Flag pattern heat surface 25, rear arch water-cooling wall 31, Flag pattern heat surface lower header 32, lower header 33, and dust export 34, reciprocal grate part is arranged on the bottom of boiler furnace part and is connected with the boiler body 1 of boiler furnace part, it is characterized in that:
A, rear arch water-cooling wall 31 at the boiler body 1 of boiler furnace part, arrange a boiler water cycle mechanism between Flag pattern heat surface 25 and side water wall 6, it is by passage rear wall water-cooling wall 30 and expansion chamber upper collecting chamber 18, and lower header 33 forms, as Figure 1-5.
B, at the rear arch water-cooling wall 31 of the boiler body 1 of boiler furnace part, spray denitration cyclonic separation sedimentation device is set between the passage rear wall water-cooling wall 30 of boiler water cycle mechanism and side water wall 6, it is by denitration shower 28, denitration nozzle 24, denitrfying agent feeder 35, upper sedimentation separation room 21, lower sedimentation separation chamber 29 forms, wherein, uniform passage rear wall water-cooling wall 30 upper interval being horizontally set on rear arch water-cooling wall 31 and boiler water cycle mechanism of denitration shower 28, uniform on denitration shower 28 denitration nozzle 24 is set, realize unidirectional spray denitration sedimentation separation, the bottom of denitration shower 28 is communicated with denitrfying agent feeder 35, as Fig. 1, 2, shown in 5.Here, denitration nozzle 24 also uniformly can arrange denitration nozzle 24 denitration shower 28 is upper and lower, realizes Bidirectional spray denitration sedimentation separation, as shown in Figure 3,4.In addition, denitration shower 28 can be designed as many rows up and down, such as two rows, or three or four rows.
The reciprocal grate structure that C, the design of reciprocal grate portion adopt height opposite side low inclined-plane in side to arrange, it is by reciprocal grate 11, slip expanding stent 12, and boiler supports 13 forms, as Figure 1-5.In addition, this technology is not limited only to the structure of reciprocal grate 11, also can adopt other fire grate structure, such as traveling-grate stoker structure etc.
The passage rear wall water-cooling wall 30 of said boiler water cycle mechanism is designed to the top indent of co-current contact after the first adverse current of cyclone type, lower lobes inverted S-shaped, further, passage rear wall water-cooling wall 30 is upper and lower to be communicated with lower header 33 with expansion chamber upper collecting chamber 18 respectively, as Figure 1-5.
The upper sedimentation separation room 21 of said spray denitration cyclonic separation sedimentation device is by rear arch water-cooling wall 31, passage rear wall water-cooling wall 30, side water wall 6, and denitration nozzle 24 and denitration shower 28 upper part interval form, lower sedimentation separation chamber 29 is formed by between passage rear wall water-cooling wall 30 bottom and Flag pattern heat surface 25 lower region, as Figure 1-5.
The course of work and the principle of this technology are: be first, coal is fallen on reciprocal grate 11 under gravity, send under machine power effect in burner hearth 7 and burn, produce heat by the face arch water-cooling wall 8 of burner hearth, rear arch water-cooling wall 31, side water wall 6 absorbs, flue gas after cooling behind upper sedimentation separation room 21 on be advanced into that separation chamber 29 falls in sinking, Flag pattern heat surface 25 carries out washing away heat exchange, complete whole heat transfer process, afterwards, discharged by exhanst gas outlet 23.Here, dust is discharged by dust export 34 after lower sedimentation separation chamber 29 sedimentation, completes the boiler smoke course of work.Next is that boiler water cycle process is that boiler blow-down water flows into drum 3 through water inlet pipe 2, and boiler water outlet is flowed out through outlet pipe 19.Concrete one is fed water by drum 3, face arch down-comer 4, face arch lower header 9, arch upper collecting chamber 17 before and after flowing into after reciprocal grate 11 and burner hearth 7 heat exchange, last time water pipe 15 get back to drum 3, complete face arch water-cooling wall 8 water circulation; Two is by drum 3, and side wall down-comer 5, side wall lower header 10 feed water, after reciprocal grate 11 and burner hearth 7 heat exchange, flow into side water wall upper collecting chamber 16, and last time, water pipe 15 got back to drum 3, completed side water wall 6 water circulation; Three is by drum 3, rear arch feed pipe 27, down-comer 26, lower header 33 feed water, arch upper collecting chamber 17 before and after flowing into after reciprocal grate 11 and burner hearth 7 heat exchange, expansion chamber upper collecting chamber 18, last time water pipe 15 get back to drum 3, complete rear arch water-cooling wall 31, passage rear wall water-cooling wall 30 water circulation; Four is fed water by drum 3, Flag pattern heat surface feed pipe 14, enters Flag pattern heat surface lower header 32, Flag pattern heat surface pipe 22, Flag pattern heat surface 25, Flag pattern heat surface upper collecting chamber 20, completes Flag pattern heat surface 25 water circulation, by outlet pipe 19 water outlet, complete the whole course of work.What needs stressed is this technology spray denitration cyclonic separation sedimentation device and boiler water cycle mechanism, the former mainly carries out spray denitration and cyclonic separation sedimentation, after the first adverse current of the denitrfying agent that exiting flue gas and the denitration nozzle 24 of burner hearth 7 eject, following current contacts, in denitration Sproy cyclone separate and subside room 21, namely go up in separate and subside room 21 and lower sedimentation separation chamber 29 and carry out chemical reaction, complete denitrating flue gas depositing dust separate and subside process, reduce discharged nitrous oxides, energy-conserving and environment-protective, this technology spray denitration cyclonic separation sedimentation device can be widely used on other various boiler.The latter mainly carries out adding one group of boiler water cycle process, namely passage rear wall water-cooling wall 30 is designed to the top indent of co-current contact after the first adverse current of cyclone type, inverted S-shaped (or being called arc cyclone structure) of lower lobes, improve heating surface area little, furnace outlet flue gas does not directly wash away Flag pattern heat surface coiled pipe, reduce wear, prolonged boiler service life, reduce maintenance frequency, reduce use cost, in addition, this technology is not limited only to the structure of reciprocal grate 11, also other fire grate structure can be adopted, such as traveling-grate stoker structure etc.In this technology, denitrfying agent adopts liquefied ammonia, ammonia, urea liquid.A kind of single drum horizontal formula multiple stove fire grate spray denitration corner tube boiler of this technology is hot-water boiler, steam boiler etc., also can be the boiler of other type.In addition, this technology can be widely used in other various corner tube boiler.
The beneficial effect of this technology is compared had feature with existing technology in other words and is: design spray denitration cyclonic separation sedimentation device and boiler water cycle mechanism, be provided with the sedimentation separation room of spray denitration and cyclone separating structure, there is the discharge reducing nitrogen oxide, reduce air and contamination by dust, improve boiler thermal output, the features such as energy-saving environmental protection safety.
Accompanying drawing explanation
Fig. 1 is the front view of the present invention's (spray denitration pipe 28 top arranges denitration nozzle 24, and passage rear wall water-cooling wall 30 is top indent, the inverted S-shaped structure of lower lobes).
Fig. 2 is that (spray denitration pipe 28 top arranges denitration nozzle 24 to the second structure of the present invention, passage rear wall water-cooling wall 30 is vertically disposed upper part two passage rear wall water-cooling walls 30, and lower part merges and is communicated with is the structure of a passage rear wall water-cooling wall 30) front view.
Fig. 3 is the front view of the third structure of the present invention (spray denitration pipe 28 is upper and lower arranges denitration nozzle 24, and passage rear wall water-cooling wall 30 is for being top indent, the inverted S-shaped structure of lower lobes).
Fig. 4 is that (spray denitration pipe 28 is upper and lower arranges denitration nozzle 24 to the present invention's the 4th kind of structure, passage rear wall water-cooling wall 30 is vertically disposed upper part two passage rear wall water-cooling walls 30, and lower part merges and is communicated with is the structure of a passage rear wall water-cooling wall 30) front view.
Fig. 5 is that (spray denitration pipe 28 top arranges denitration nozzle 24 to the present invention's the 5th kind of structure, passage rear wall water-cooling wall 30 is top indent, the inverted S-shaped structure of lower lobes, and 19 outlet pipes are arranged on below, note: above four kinds be all arrange superincumbent) front view.
In figure: 1 boiler body, 2 water inlet pipes, 3 drums, 4 face arch down-comers, 5 side wall down-comers (or being called port side boiler support-side water-cooling wall down-comer), 6 side water walls, 7 burner hearths, 8 face arch water-cooling walls, 9 face arch lower headers, 10 side wall lower headers, 11 reciprocal grates, 12 slip expanding stents, 13 boiler supports, 14 Flag pattern heat surface feed pipes, 15 last time water pipe, 16 side water wall upper collecting chambers, encircle upper collecting chamber before and after 17,18 expansion chamber upper collecting chambers, 19 outlet pipes, 20 Flag pattern heat surface upper collecting chambers ,sedimentation separation room (or being called spray denitration cyclone settling separation chamber) on 21, 22 Flag pattern heat surface pipes, 23 exhanst gas outlets, 24 denitration nozzle, 25 Flag pattern heat surfaces, 26 down-comers (or being called rear arch passage rear wall down-comer), 27 rear arch feed pipes (or being called that starboard boiler supports rear arch feed pipe), 28 spray denitration pipes, 29 times sedimentation separation chambers (or being called sedimentation separation room), 30 passage rear wall water-cooling walls, 31 rear arch water-cooling walls, 32 Flag pattern heat surface lower headers, 33 lower headers (or being called rear arch water-cooling wall passage rear wall lower header), 34 dust exports, 35 denitrfying agent feeders (or being called denitrfying agent feedway).
detailed description of the invention
The specific embodiment of the present invention, as Figure 1-5, a kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler, comprise boiler furnace part, reciprocal grate part, boiler furnace part comprises boiler body 1, four of the setting of boiler body 1 surrounding vertical have side wall down-comer 5 and the rear arch feed pipe 27 of supporting role, at the drum 3 that boiler body 1 upper left is arranged, the water inlet pipe 2 be communicated with drum 3, Flag pattern heat surface feed pipe 14, face arch down-comer 4, and down-comer 26 and last time water pipe 15, side water wall 6, burner hearth 7, face arch water-cooling wall 8, face arch lower header 9, side wall lower header 10, side water wall upper collecting chamber 16, front and back arch upper collecting chamber 17, outlet pipe 19, Flag pattern heat surface upper collecting chamber 20 ,flag pattern heat surface pipe 22, exhanst gas outlet 23, Flag pattern heat surface 25, rear arch water-cooling wall 31, Flag pattern heat surface lower header 32, lower header 33, and dust export 34, reciprocal grate part is arranged on the bottom of boiler furnace part and is connected with the boiler body 1 of boiler furnace part, it is characterized in that:
A, rear arch water-cooling wall 31 at the boiler body 1 of boiler furnace part, arrange a boiler water cycle mechanism between Flag pattern heat surface 25 and side water wall 6, it is by passage rear wall water-cooling wall 30 and expansion chamber upper collecting chamber 18, and lower header 33 forms, as Figure 1-5.
B, at the rear arch water-cooling wall 31 of the boiler body 1 of boiler furnace part, spray denitration cyclonic separation sedimentation device is set between the passage rear wall water-cooling wall 30 of boiler water cycle mechanism and side water wall 6, it is by denitration shower 28, denitration nozzle 24, denitrfying agent feeder 35, upper sedimentation separation room 21, lower sedimentation separation chamber 29 forms, wherein, uniform passage rear wall water-cooling wall 30 upper interval being horizontally set on rear arch water-cooling wall 31 and boiler water cycle mechanism of denitration shower 28, uniform on denitration shower 28 denitration nozzle 24 is set, realize unidirectional spray denitration sedimentation separation, the bottom of denitration shower 28 is communicated with denitrfying agent feeder 35, as Fig. 1, 2, shown in 5.Here, denitration nozzle 24 also uniformly can arrange denitration nozzle 24 denitration shower 28 is upper and lower, realizes Bidirectional spray denitration sedimentation separation, as shown in Figure 3,4.In addition, denitration shower 28 can be designed as many rows up and down, such as two rows, or three or four rows.
The reciprocal grate structure that C, reciprocal grate partial design adopt height opposite side low inclined-plane in side to arrange, it is by reciprocal grate 11, slip expanding stent 12, and boiler supports 13 forms, as Figure 1-5.In addition, this technology is not limited only to the structure of reciprocal grate 11, also can adopt other fire grate structure, such as traveling-grate stoker structure etc.
The passage rear wall water-cooling wall 30 of said boiler water cycle mechanism is designed to the top indent of co-current contact after the first adverse current of cyclone type, lower lobes inverted S-shaped, further, passage rear wall water-cooling wall 30 is upper and lower to be communicated with lower header 33 with expansion chamber upper collecting chamber 18 respectively, as Figure 1-5.
The upper sedimentation separation room 21 of said spray denitration cyclonic separation sedimentation device is by rear arch water-cooling wall 31, passage rear wall water-cooling wall 30, side water wall 6, and denitration nozzle 24 and denitration shower 28 upper part interval form, lower sedimentation separation chamber 29 is formed by between passage rear wall water-cooling wall 30 bottom and Flag pattern heat surface 25 lower region, as Figure 1-5.

Claims (3)

1. a single drum horizontal formula reciprocal grate spray denitration corner tube boiler, comprise boiler furnace part, reciprocal grate part, boiler furnace part comprises boiler body 1, four of the setting of boiler body 1 surrounding vertical have side wall down-comer 5 and the rear arch feed pipe 27 of supporting role, at the drum 3 that boiler body 1 upper left is arranged, the water inlet pipe 2 be communicated with drum 3, Flag pattern heat surface feed pipe 14, face arch down-comer 4, and down-comer 26 and last time water pipe 15, side water wall 6, burner hearth 7, face arch water-cooling wall 8, face arch lower header 9, side wall lower header 10, side water wall upper collecting chamber 16, front and back arch upper collecting chamber 17, outlet pipe 19, Flag pattern heat surface upper collecting chamber 20 ,flag pattern heat surface pipe 22, exhanst gas outlet 23, Flag pattern heat surface 25, rear arch water-cooling wall 31, Flag pattern heat surface lower header 32, lower header 33, and dust export 34, reciprocal grate part is arranged on the bottom of boiler furnace part and is connected with the boiler body 1 of boiler furnace part, it is characterized in that:
A, rear arch water-cooling wall 31 at the boiler body 1 of boiler furnace part, arrange a boiler water cycle mechanism between Flag pattern heat surface 25 and side water wall 6, it is by passage rear wall water-cooling wall 30 and expansion chamber upper collecting chamber 18, and lower header 33 forms;
B, at the rear arch water-cooling wall 31 of the boiler body 1 of boiler furnace part, spray denitration cyclonic separation sedimentation device is set between the passage rear wall water-cooling wall 30 of boiler water cycle mechanism and side water wall 6, it is by denitration shower 28, denitration nozzle 24, denitrfying agent feeder 35, upper sedimentation separation room 21, lower sedimentation separation chamber 29 forms, wherein, uniform passage rear wall water-cooling wall 30 upper interval being horizontally set on rear arch water-cooling wall 31 and boiler water cycle mechanism of denitration shower 28, uniform on denitration shower 28 denitration nozzle 24 is set, the bottom of denitration shower 28 is communicated with denitrfying agent feeder 35,
The reciprocal grate structure that C, the design of reciprocal grate portion adopt height opposite side low inclined-plane in side to arrange, it is by reciprocal grate 11, slip expanding stent 12, and boiler supports 13 forms.
2. a kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler as claimed in claim 1, it is characterized in that: the passage rear wall water-cooling wall 30 of said boiler water cycle mechanism is designed to the top indent of co-current contact after the first adverse current of cyclone type, lower lobes inverted S-shaped, further, passage rear wall water-cooling wall 30 is upper and lower is communicated with lower header 33 with expansion chamber upper collecting chamber 18 respectively.
3. a kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler as claimed in claim 1 or 2, it is characterized in that: the upper sedimentation separation room 21 of said spray denitration cyclonic separation sedimentation device is by rear arch water-cooling wall 31, passage rear wall water-cooling wall 30, side water wall 6, and denitration nozzle 24 and denitration shower 28 upper part interval form, lower sedimentation separation chamber 29 is formed by between passage rear wall water-cooling wall 30 bottom and Flag pattern heat surface 25 lower region.
CN201410378220.8A 2014-08-04 2014-08-04 A kind of single drum horizontal formula reciprocal grate sprays denitration corner tube boiler Active CN105318536B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002177740A (en) * 2000-12-15 2002-06-25 Ishikawajima Harima Heavy Ind Co Ltd Denitration apparatus for waste heat recovery boiler
CN1884909A (en) * 2006-07-10 2006-12-27 西安交通大学 Internally circulating fluidized reburning device for fly ash based on high temperature separation
CN200965239Y (en) * 2006-08-02 2007-10-24 周开根 Tunnel firebox and soot-free coal-firing biomass-firing boiler constituted therefor
CN102374658A (en) * 2011-07-27 2012-03-14 西安交通大学 Angular pipe water circulating structure with complete forced upward flowing on heating surface
CN103212284A (en) * 2013-03-15 2013-07-24 孙琦 Method and device for combined removal of nitric oxide and sulfide in flue gas
CN204100568U (en) * 2014-08-04 2015-01-14 哈尔滨四方锅炉有限公司 A kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002177740A (en) * 2000-12-15 2002-06-25 Ishikawajima Harima Heavy Ind Co Ltd Denitration apparatus for waste heat recovery boiler
CN1884909A (en) * 2006-07-10 2006-12-27 西安交通大学 Internally circulating fluidized reburning device for fly ash based on high temperature separation
CN200965239Y (en) * 2006-08-02 2007-10-24 周开根 Tunnel firebox and soot-free coal-firing biomass-firing boiler constituted therefor
CN102374658A (en) * 2011-07-27 2012-03-14 西安交通大学 Angular pipe water circulating structure with complete forced upward flowing on heating surface
CN103212284A (en) * 2013-03-15 2013-07-24 孙琦 Method and device for combined removal of nitric oxide and sulfide in flue gas
CN204100568U (en) * 2014-08-04 2015-01-14 哈尔滨四方锅炉有限公司 A kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler

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