CN204345599U - A kind of spray denitration boiler with expansion chamber - Google Patents

A kind of spray denitration boiler with expansion chamber Download PDF

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Publication number
CN204345599U
CN204345599U CN201420816743.1U CN201420816743U CN204345599U CN 204345599 U CN204345599 U CN 204345599U CN 201420816743 U CN201420816743 U CN 201420816743U CN 204345599 U CN204345599 U CN 204345599U
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water
boiler
cooling
arch
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Expired - Fee Related
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CN201420816743.1U
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Chinese (zh)
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孙伟东
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HARBIN SIFANG BOILER Co Ltd
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HARBIN SIFANG BOILER Co Ltd
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Abstract

The utility model relates to a kind of spray denitration boiler with expansion chamber, comprise boiler furnace part, fire grate part, fire grate part is arranged on the bottom of boiler furnace part and is connected with boiler furnace part, the boiler body (1) of oven body part arranges boiler water cycle mechanism, it is characterized in that: boiler water cycle mechanism is made up of anterior boiler water cycle mechanism and rear portion boiler water cycle mechanism, spray denitration cyclonic separation sedimentation device is set simultaneously, it is by denitration shower (34), denitration nozzle (18), denitrfying agent feeder (35), upper sedimentation separation room (27), lower sedimentation separation chamber (36) composition, there is support strength high, Stability Analysis of Structures, reduce the discharge of nitrogen oxide, reduce air pollution, improve the thermal efficiency, the features such as energy-saving environmental protection safety.

Description

A kind of spray denitration boiler with expansion chamber
Technical field
The utility model relates to boiler technology field, particularly can meet the emission request of national emission standard of air pollutants for boilers, solves discharged nitrous oxides concentration high, a kind of spray denitration boiler with expansion chamber 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, and boiler intensity is low, supports insecure, easily causes security incident.Because the integral arrangement of corner tube boiler limits by intensity, be unfavorable for large-sized boiler manufacture.Common corner tube boiler fire grate length can not fully lengthen, and fuel combustion is insufficient, and efficiency of fire coal is low, can not burning low grade coal, and phosphorus content is high, and energy ezpenditure is large.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.At present, although though known boiler some with expansion chamber, without denitration spray equipment, can not denitration.Along with national environmental protection policy is increasingly strict, the boiler of known band expansion chamber can not meet the emission request of country about atmosphere pollutants emission standards, and discharged nitrous oxides concentration is high, contaminated environment.Therefore, how to solve Denitration in Boiler, reduce discharged nitrous oxides, energy-conserving and environment-protective etc. have become needs the urgent problem solved at present.
Summary of the invention
The purpose of this utility model 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, high strength supports, structural safety is stablized, improve boiler thermal output, denitration spray equipment is set at the boiler internal with expansion chamber and designs new boiler water cycle mechanism, reduce a kind of spray denitration boiler with expansion chamber of nitrogen oxide.
The technical solution adopted for the present invention to solve the technical problems is: a kind of spray denitration boiler with expansion chamber, comprise boiler furnace part, fire grate part, fire grate part is arranged on the bottom of boiler furnace part and is connected with boiler furnace part, boiler furnace part comprises boiler body 1, boiler body 1 comprises the port side boiler with supporting role and supports 5, upper boiler supporting steel frame 14, inferior boiler supporting steel frame 15, middle part boiler supports steelframe 16, starboard boiler supporting steel frame 17, the anterior lower header 8 of water-cooling wall and water-cooling wall rear portion lower header 25, at upper drum 21 and the lower drum 30 of the setting of boiler body 1 upper right portion, convection bank 29 between upper drum 21 and lower drum 30, the water inlet pipe 20 be communicated with upper drum 21, outlet pipe 19, face arch down-comer and rear arch down-comer, side water wall 4, burner hearth 6, face arch water-cooling wall 7, face arch lower header 9, side water wall upper collecting chamber 2, side water wall lower header 10, rear arch water-cooling wall 32, lower header 33, exhanst gas outlet 28 and dust export 38, and the rear arch water-cooling wall 32 of boiler body 1 in boiler furnace part, upper drum 21, lower drum 30 and the convection bank between the two 29, the interval that side water wall 4 is formed arranges boiler water cycle mechanism, it is characterized in that:
A, at the rear arch water-cooling wall 32 of the boiler body 1 of boiler furnace part, upper drum 21, lower drum 30 and the convection bank between the two 29, and the boiler water cycle mechanism that the interval of side water wall 4 formation is arranged is made up of anterior boiler water cycle mechanism and rear portion boiler water cycle mechanism, anterior boiler water cycle mechanism is by face arch lower header 9, the anterior lower header 8 of water-cooling wall, side wall lower header 10 and the face arch down-comer be communicated with them form, face arch down-comer is made up of the first down-comer 3 second down-comer 22, wherein, the top of the first down-comer 3 connects drum 21 and connects the anterior lower header 8 of water-cooling wall and side wall lower header 10 after lower forks respectively, on second down-comer 22, lower respectively with upper drum 21, face arch lower header 9 connects, face arch lower header 9 is connected with face arch water-cooling wall 7, rear portion boiler water cycle mechanism is by lower header 12 in the middle part of channel water-cooling wall, rear wall water-cooling wall 31, rear arch water-cooling wall 32, lower header 33 and water-cooling wall rear portion lower header 25 and the rear arch down-comer be communicated with them form, rear arch down-comer is by the 3rd down-comer 23, 4th down-comer 24 forms, wherein, the top of the 3rd down-comer 23 connects drum 21 and connects lower header 12 and water-cooling wall rear portion lower header 25 in the middle part of water-cooling wall after lower forks respectively, on 4th down-comer 24, lower respectively with upper drum 21, lower header 33 connects, lower header 33 is connected with rear wall water-cooling wall 31 and rear arch water-cooling wall 32 respectively, here, boiler body 1 comprises the port side boiler with supporting role and supports 5, upper boiler supporting steel frame 14, inferior boiler supporting steel frame 15, middle part boiler supports steelframe 16, starboard boiler supporting steel frame 17, they form major diameter cornue frame system, formation high strength supports, structural safety is stablized, the overall length, width and height of boiler change, large-sized boiler can be produced, particularly fire grate length increases, incendivity colm, improve efficiency of combustion, economize energy.In addition, the recent design of boiler water cycle mechanism and face arch down-comer and rear arch down-comer and, namely face arch down-comer is made up of the first down-comer 3 and the second down-comer 22, rear arch down-comer is by the 3rd down-comer 23,4th down-comer 24 forms, and improves boiler thermal output, as shown in figures 1-8.
B, at the rear arch water-cooling wall 32 of the boiler body 1 of boiler furnace part, the interval that the passage rear wall water-cooling wall 31 of boiler water cycle mechanism and side water wall 4 are formed arranges spray denitration cyclonic separation sedimentation device, it is by denitration shower 34, denitration nozzle 18, denitrfying agent feeder 35, upper sedimentation separation room 27, lower sedimentation separation chamber 36 forms, wherein, uniform passage rear wall water-cooling wall 31 upper interval being arranged on rear arch water-cooling wall 32 and boiler water cycle mechanism of denitration shower 34 level, uniform on denitration shower 34 denitration nozzle 18 is set, the bottom of denitration shower 34 is communicated with denitrfying agent feeder 35, as shown in figures 1-8.
The denitration nozzle 18 of uniform setting on said denitration shower 34 is unidirectional setting, as shown in figures 1-8, certainly, and also can upper and lower two-way setting.
The upper sedimentation separation room 27 of said spray denitration cyclonic separation sedimentation device is by rear arch water-cooling wall 32, passage rear wall water-cooling wall 31, side water wall 4, and denitration nozzle 18 and denitration shower 34 upper interval are formed, lower sedimentation separation chamber 29 is by passage rear wall water-cooling wall 31 bottom, and denitration nozzle 24 and denitration shower 28 bottom and convection bank 29 left lower interval are formed, as shown in figures 1-8.
Fire grate partial design adopts reciprocal grate structure, as Figure 1-5.Here it is to be understood that Fig. 1-5 provides is reciprocal grate structure, what Fig. 6-8 provided is traveling-grate stoker structure.This technology is also applicable to other fire grate structure.
The course of work and the principle of this technology are: be first, coal is fallen on reciprocal grate or combustion apparatus 11 under gravity, send under machine power effect in burner hearth 6 and burn, the heat produced is by the face arch water-cooling wall 7 of burner hearth 6, rear arch water-cooling wall 32, side water wall 4 absorbs, the flue gas after cooling behind upper sedimentation separation room 27 and lower sedimentation separation chamber 36 on be advanced into convection bank 29 and carry out washing away heat exchange, complete whole heat transfer process, discharged by exhaust opening 28.Wherein, dust is discharged by dust export after sedimentation behind upper sedimentation separation room 27 and lower sedimentation separation chamber 36, completes the boiler smoke course of work.Next is that boiler blow-down water flows into upper drum 21 through water inlet pipe 20, and boiler water outlet flows out drum through outlet pipe 19.Concrete one is by lower header 10, the 3rd down-comer 23 in the middle part of upper drum 21, first down-comer 3, the anterior lower header 8 of water-cooling wall, water-cooling wall, in the middle part of water-cooling wall, lower header 12, water-cooling wall rear portion lower header 25 feed water, after combustion apparatus 11 and burner hearth 6 heat exchange, flow into side water wall 4, get back to upper drum 21 by water-cooling wall upper collecting chamber 2, complete side water wall 4 water circulation; Two is fed water by upper drum 21, second down-comer 22, face arch lower header 9, flows into face arch water-cooling wall 7, gets back to upper drum 21, complete face arch water-cooling wall 7 water circulation after reciprocal grate (or being called combustion apparatus) 11 and burner hearth 6 heat exchange; Three is fed water by upper drum 21, the 4th down-comer 24, rear arch lower header 33, after reciprocal grate (or being called combustion apparatus) 11 and burner hearth 6 heat exchange flow channel rear wall water-cooling wall 31, rear arch water-cooling wall 32, get back to upper drum 21, complete rear arch water-cooling wall 32, passage rear wall water-cooling wall 31, upper sedimentation separation room (or being called denitration Sproy cyclone sedimentation separation room) 27, lower sedimentation separation chamber 36 water circulation; Four is that upper drum 21 enters lower drum 30 through convection bank 29, and due to density contrast, a part rises, and a part declines, and completes the Natural Circulation between upper and lower drum 21,30 and convection bank 29, completes 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 18 of burner hearth 6 eject, following current contacts, chemical reaction is carried out in upper sedimentation separation room 27, lower sedimentation separation chamber 36, 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 adds one group of boiler water cycle process, improve heating surface area, furnace outlet flue gas does not directly wash away Flag pattern heat surface coiled pipe, reduces 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 (or being called combustion apparatus) 11, also other fire grate structure can be adopted, such as traveling-grate stoker 11 structure etc., as Fig. 6-8.In this technology, denitrfying agent adopts liquefied ammonia, ammonia, urea liquid.This technology is applicable to 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, structural safety is stablized, boiler thermal output is high, reduce the discharge of nitrogen oxide, reduce air and contamination by dust, the features such as energy-saving environmental protection safety.
Accompanying drawing explanation
Fig. 1 is the front view of the first structure of the utility model;
Fig. 2 is the front view of the utility model the second structure;
Fig. 3 is the front view of the third structure of the utility model;
Fig. 4 is the front view of the utility model the 4th kind of structure;
Fig. 5 is the front view of the utility model the 5th kind of structure;
Fig. 6 is the front view of the utility model the 6th kind of structure;
Fig. 7 is the front view of the utility model the 7th kind of structure;
Fig. 8 is the front view of the utility model the 8th kind of structure.
In figure: 1 boiler body, 2 side water wall upper collecting chambers, 3 first down-comers, 4 side water walls, 5 port side boiler supporting steel frames, 6 burner hearths, 7 face arch water-cooling walls, the anterior lower header of 8 water-cooling walls, 9 face arch lower headers (or being called face arch header), 10 side wall lower headers, 11 reciprocal grates (or being called combustion apparatus), lower header in the middle part of 12 water-cooling walls, 13 burner hearth exhanst gas outlets, 14 upper boiler supporting steel frames, 15 inferior boiler supporting steel frames, boiler supports steelframe in the middle part of in the of 16, 17 starboard boiler supporting steel frames, 18 denitration nozzle, 19 outlet pipes, 20 water inlet pipes, 21 upper drums, 22 second down-comers, 23 the 3rd down-comers, 24 the 4th down-comers, 25 water-cooling wall rear portion lower headers, 26 burner hearth flue gas directions, sedimentation separation room (or being called denitration Sproy cyclone sedimentation separation room) on 27, 28 exhanst gas outlets (or being called exhaust opening), 29 convection banks, 30 lower drums, 31 passage rear wall water-cooling walls, 32 rear arch water-cooling walls, 33 lower headers (or being called rear arch water-cooling wall lower header), 34 denitration showers, 35 denitrfying agent feeders (or being called denitrfying agent feedway), 36 times sedimentation separation chambers, 37 flue gas dividing plates.Wherein, Fig. 1,3,6,8 is the structure not arranging flue gas dividing plate 37 in convection bank 29, Fig. 2,4,5,7 is the structure arranging flue gas dividing plate 37 in convection bank 29, mainly for increasing the time of staying of flue gas in convection bank 29, can improve the thermal efficiency.Fig. 1-5 is reciprocal grate structure, and Fig. 6-8 is toward chain line structure.
Detailed description of the invention
Detailed description of the invention of the present utility model, as shown in figures 1-8, a kind of spray denitration boiler with expansion chamber, comprise boiler furnace part, fire grate part, fire grate part is arranged on the bottom of boiler furnace part and is connected with boiler furnace part, boiler furnace part comprises boiler body 1, boiler body 1 comprises the port side boiler with supporting role and supports 5, upper boiler supporting steel frame 14, inferior boiler supporting steel frame 15, middle part boiler supports steelframe 16, starboard boiler supporting steel frame 17, the anterior lower header 8 of water-cooling wall and water-cooling wall rear portion lower header 25, at upper drum 21 and the lower drum 30 of the setting of boiler body 1 upper right portion, convection bank 29 between upper drum 21 and lower drum 30, the water inlet pipe 20 be communicated with upper drum 21, outlet pipe 19, face arch down-comer and rear arch down-comer, side water wall 4, burner hearth 6, face arch water-cooling wall 7, face arch lower header 9, side water wall upper collecting chamber 2, side water wall lower header 10, rear arch water-cooling wall 32, lower header 33, exhanst gas outlet 28 and dust export 38, and the rear arch water-cooling wall 32 of boiler body 1 in boiler furnace part, upper drum 21, lower drum 30 and the convection bank between the two 29, the interval that side water wall 4 is formed arranges boiler water cycle mechanism, it is characterized in that:
A, at the rear arch water-cooling wall 32 of the boiler body 1 of boiler furnace part, upper drum 21, lower drum 30 and the convection bank between the two 29, and the boiler water cycle mechanism that the interval of side water wall 4 formation is arranged is made up of anterior boiler water cycle mechanism and rear portion boiler water cycle mechanism, anterior boiler water cycle mechanism is by face arch lower header 9, the anterior lower header 8 of water-cooling wall, side wall lower header 10 and the face arch down-comer be communicated with them form, face arch down-comer is made up of the first down-comer 3 second down-comer 22, wherein, the top of the first down-comer 3 connects drum 21 and connects the anterior lower header 8 of water-cooling wall and side wall lower header 10 after lower forks respectively, on second down-comer 22, lower respectively with upper drum 21, face arch lower header 9 connects, face arch lower header 9 is connected with face arch water-cooling wall 7, rear portion boiler water cycle mechanism is by lower header 12 in the middle part of channel water-cooling wall, rear wall water-cooling wall 31, rear arch water-cooling wall 32, lower header 33 and water-cooling wall rear portion lower header 25 and the rear arch down-comer be communicated with them form, rear arch down-comer is by the 3rd down-comer 23, 4th down-comer 24 forms, wherein, the top of the 3rd down-comer 23 connects drum 21 and connects lower header 12 and water-cooling wall rear portion lower header 25 in the middle part of water-cooling wall after lower forks respectively, on 4th down-comer 24, lower respectively with upper drum 21, lower header 33 connects, lower header 33 is connected with rear wall water-cooling wall 31 and rear arch water-cooling wall 32 respectively, , here, boiler body 1 comprises the port side boiler with supporting role and supports 5, upper boiler supporting steel frame 14, inferior boiler supporting steel frame 15, middle part boiler supports steelframe 16, starboard boiler supporting steel frame 17, they form major diameter cornue frame system, formation high strength supports, structural safety is stablized, the overall length, width and height of boiler change, large-sized boiler can be produced, particularly fire grate length increases, incendivity colm, improve efficiency of combustion, economize energy.In addition, the recent design of boiler water cycle mechanism and face arch down-comer and rear arch down-comer and, namely face arch down-comer is made up of the first down-comer 3 and the second down-comer 22, rear arch down-comer is by the 3rd down-comer 23,4th down-comer 24 forms, and improves boiler thermal output, as shown in figures 1-8.
B, at the rear arch water-cooling wall 32 of the boiler body 1 of boiler furnace part, the interval that the passage rear wall water-cooling wall 31 of boiler water cycle mechanism and side water wall 4 are formed arranges spray denitration cyclonic separation sedimentation device, it is by denitration shower 34, denitration nozzle 18, denitrfying agent feeder 35, upper sedimentation separation room 27, lower sedimentation separation chamber 36 forms, wherein, uniform passage rear wall water-cooling wall 31 upper interval being arranged on rear arch water-cooling wall 32 and boiler water cycle mechanism of denitration shower 34 level, uniform on denitration shower 34 denitration nozzle 18 is set, the bottom of denitration shower 34 is communicated with denitrfying agent feeder 35, as shown in figures 1-8.
The denitration nozzle 18 of uniform setting on said denitration shower 34 is unidirectional setting, as shown in figures 1-8, certainly, and also can upper and lower two-way setting.
The upper sedimentation separation room 27 of said spray denitration cyclonic separation sedimentation device is by rear arch water-cooling wall 32, passage rear wall water-cooling wall 31, side water wall 4, and denitration nozzle 18 and denitration shower 34 upper interval are formed, lower sedimentation separation chamber 29 is by passage rear wall water-cooling wall 31 bottom, and denitration nozzle 24 and denitration shower 28 bottom and convection bank 29 left lower interval are formed, as shown in figures 1-8.
Fire grate partial design adopts reciprocal grate structure, as Figure 1-5.Here it is to be understood that Fig. 1-5 provides is reciprocal grate structure, what Fig. 6-8 provided is traveling-grate stoker structure.This technology is also applicable to other fire grate structure.

Claims (3)

1. the spray denitration boiler with expansion chamber, comprise boiler furnace part, fire grate part, fire grate part is arranged on the bottom of boiler furnace part and is connected with boiler furnace part, boiler furnace part comprises boiler body (1), boiler body (1) comprises the port side boiler supporting steel frame (5) with supporting role, upper boiler supporting steel frame (14), inferior boiler supporting steel frame (15), middle part boiler supports steelframe (16), starboard boiler supporting steel frame (17), the anterior lower header (8) of water-cooling wall and water-cooling wall rear portion lower header (25), at upper drum (21) and the lower drum (30) of the setting of boiler body (1) upper right portion, convection bank (29) between upper drum (21) and lower drum (30), the water inlet pipe (20) be communicated with upper drum (21), outlet pipe (19), face arch down-comer and rear arch down-comer, side water wall (4), burner hearth (6), face arch water-cooling wall (7), face arch lower header (9), side water wall upper collecting chamber (2), side water wall lower header (10), rear arch water-cooling wall (32), lower header (33), exhanst gas outlet (28) and dust export, and the rear arch water-cooling wall (32) of boiler body (1) in boiler furnace part, upper drum (21), lower drum (30) and the convection bank between the two (29), the interval that side water wall (4) is formed arranges boiler water cycle mechanism, it is characterized in that:
A, at the rear arch water-cooling wall (32) of the boiler body (1) of boiler furnace part, upper drum (21), lower drum (30) and the convection bank between the two (29), and the boiler water cycle mechanism that the interval that forms of side water wall (4) is arranged is made up of anterior boiler water cycle mechanism and rear portion boiler water cycle mechanism, anterior boiler water cycle mechanism is by face arch lower header (9), the anterior lower header (8) of water-cooling wall, side wall lower header (10) and the face arch down-comer be communicated with them form, face arch down-comer is made up of the first down-comer (3) second down-comer (22), wherein, the top of the first down-comer (3) connects drum (21) and connects the anterior lower header (8) of water-cooling wall and side wall lower header (10) after lower forks respectively, on second down-comer (22), lower respectively with upper drum (21), face arch lower header (9) connects, face arch lower header (9) is connected with face arch water-cooling wall (7), rear portion boiler water cycle mechanism is by lower header (12) in the middle part of channel water-cooling wall, rear wall water-cooling wall (31), rear arch water-cooling wall (32), lower header (33) and water-cooling wall rear portion lower header (25) and the rear arch down-comer be communicated with them form, rear arch down-comer is by the 3rd down-comer (23), 4th down-comer (24) composition, wherein, the top of the 3rd down-comer (23) connects drum (21) and connects lower header in the middle part of water-cooling wall (12) and water-cooling wall rear portion lower header (25) after lower forks respectively, on 4th down-comer (24), lower respectively with upper drum (21), lower header (33) connects, lower header (33) is connected with rear wall water-cooling wall (31) and rear arch water-cooling wall (32) respectively,
B, at the rear arch water-cooling wall (32) of the boiler body (1) of boiler furnace part, the interval that the passage rear wall water-cooling wall (31) of boiler water cycle mechanism and side water wall (4) are formed arranges spray denitration cyclonic separation sedimentation device, it is by denitration shower (34), denitration nozzle (18), denitrfying agent feeder (35), upper sedimentation separation room (27), lower sedimentation separation chamber (36) composition, wherein, uniform passage rear wall water-cooling wall (31) upper interval being arranged on rear arch water-cooling wall (32) and boiler water cycle mechanism of denitration shower (34) level, denitration shower (34) is above uniform arranges denitration nozzle (18), the bottom of denitration shower (34) is communicated with denitrfying agent feeder (35).
2. a kind of spray denitration boiler with expansion chamber as claimed in claim 1, is characterized in that: the denitration nozzle (18) of the upper uniform setting of said denitration shower (34) is unidirectional setting.
3. a kind of spray denitration boiler with expansion chamber as claimed in claim 1 or 2, it is characterized in that: the upper sedimentation separation room (27) of said spray denitration cyclonic separation sedimentation device is by rear arch water-cooling wall (32), passage rear wall water-cooling wall (31), side water wall (4), and denitration nozzle (18) and denitration shower (34) upper interval are formed, lower sedimentation separation chamber (29) is by passage rear wall water-cooling wall (31) bottom, and denitration nozzle (24) and denitration shower (28) bottom and convection bank (29) left lower interval are formed.
CN201420816743.1U 2014-12-22 2014-12-22 A kind of spray denitration boiler with expansion chamber Expired - Fee Related CN204345599U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420816743.1U CN204345599U (en) 2014-12-22 2014-12-22 A kind of spray denitration boiler with expansion chamber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420816743.1U CN204345599U (en) 2014-12-22 2014-12-22 A kind of spray denitration boiler with expansion chamber

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CN204345599U true CN204345599U (en) 2015-05-20

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Granted publication date: 20150520

Termination date: 20181222