CN206001429U - A kind of double reheat π type boiler - Google Patents

A kind of double reheat π type boiler Download PDF

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Publication number
CN206001429U
CN206001429U CN201620990225.0U CN201620990225U CN206001429U CN 206001429 U CN206001429 U CN 206001429U CN 201620990225 U CN201620990225 U CN 201620990225U CN 206001429 U CN206001429 U CN 206001429U
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bag
cooling
water
superheater
afterbody
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CN201620990225.0U
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Chinese (zh)
Inventor
王永杰
宋宝军
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Harbin Boiler Co Ltd
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Harbin Boiler Co Ltd
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Abstract

A kind of double reheat π type boiler disclosed in this utility model, including body of heater, afterbody bag wall system, denitrification apparatus, air preheater, flue gas recirculation system, gas baffle, burner, horizontal flue bag wall system, it is provided with water-cooling wall in body of heater, water-cooling wall is connected with afterbody bag wall system by horizontal flue bag wall system, gas baffle is arranged on the lower end of afterbody bag wall system, denitrification apparatus respectively with afterbody bag wall system, air preheater is connected, burner is connected with flue gas recirculation system, it is respectively disposed with division pendant superheater along flue gas flow successively, finishing superheater, high pressure-temperature reheater, low-voltage high-temperature reheater, two-stage superheater, back-end ductwork heating surface, it is provided with gas proportioning damper device in stack base, it is used for distributing exhaust gas volumn, effectively control the reheated steam outlet temperature in load range.

Description

A kind of double reheat π type boiler
Technical field
This utility model is related to a kind of double reheat controllable register and flue gas recirculation is used in combination the π type boiler of homoiothermic, More particularly, to a kind of double reheat π type boiler.
Background technology
Heavy duty boiler reheat steam temperature is many at present is subtracted using tilting burner, afterbody two flue damper or middle water spray Adjusting reheat steam temperature, there is the shortcomings of amplitude of accommodation is less, response speed postpones or economy is poor in warm device, especially for The differentiated situation of reheating vapour quality, can only adjust reheat steam temperature using spray desuperheating, to sacrifice power plant's performance driving economy as generation Valency.For current country and the social present situation to the increasingly increase of thermal power unit operation energy-saving and emission-reduction requirement pressure it is necessary to seek more Additivity can be more superior, economical homoiothermic measure reach do not increase power plant run coal consumption on the basis of realize to reheat steam temperature Effectively adjust.
Utility model content
A purpose of the present utility model is in order to overcome the above-mentioned deficiencies of the prior art, and then provides a kind of double reheat π type boiler, this utility model structure is simple, is capable of the control of flue gas recycled amount, realizes to different quality reheat steam temperatures Regulation and coupling, increase the economy of unit operation and motility.
The technical solution of the utility model:
A kind of double reheat π type boiler is it is characterised in that inclusion body of heater, afterbody bag wall system, denitrification apparatus, air are pre- Hot device, flue gas recirculation system, gas baffle, burner, horizontal flue bag wall system, are provided with water-cooling wall in described body of heater, Described water-cooling wall is connected with described afterbody bag wall system by described horizontal flue bag wall system, and described gas baffle is arranged on The lower end of described afterbody bag wall system, described denitrification apparatus are connected with described afterbody bag wall system, described air preheater respectively Connect, described burner is connected with described flue gas recirculation system.
Further, described horizontal flue bag wall system is provided with high pressure final reheater, low-pressure final stage reheater and two Level superheater, described water-cooling wall is provided with division pendant superheater and finishing superheater, is provided with described afterbody bag wall system High pressure low temperature reheater, low-temp low-pressure reheater and economizer, below described denitrification apparatus, folding is provided with classification economizer.
Further, water-cooling wall outlet header, horizontal flue outlet header, ceiling tube inlet header, separator are also included, Described economizer respectively with described classification economizer and described water-cooling wall be connected, described water-cooling wall outlet header respectively with described water Cold wall and described horizontal flue outlet header connect, described ceiling tube inlet header respectively with described horizontal flue outlet header and Described afterbody bag wall system connects, and described separator is connected with described afterbody bag wall system and described division pendant superheater respectively.
Further, described burner includes one of SOFA burner and main burner.
Further, also include mixing header, described mixing header is connected with described water-cooling wall.
Further, described flue gas recirculation system includes fume gas extraction port, recirculation gas approach, flue gas recirculation wind Machine, recirculation exhaust pass.
Further, it is provided with Late reworking between described division pendant superheater and described finishing superheater, described It is respectively provided between division pendant superheater and described Late reworking, between described finishing superheater and described Late reworking There is direct-contact desuperheater.
This utility model has the advantages that with respect to prior art:Double reheat π type disclosed in this utility model Boiler, including body of heater, afterbody bag wall system, denitrification apparatus, air preheater, flue gas recirculation system, gas baffle, burning Device, horizontal flue bag wall system, are provided with water-cooling wall in described body of heater, and described water-cooling wall passes through described horizontal flue bag wall system It is connected with described afterbody bag wall system, described gas baffle is arranged on the lower end of described afterbody bag wall system, described denitration dress Put and be connected with described afterbody bag wall system, described air preheater respectively, described burner and described flue gas recirculation system It is connected, be respectively disposed with division pendant superheater, finishing superheater, high pressure-temperature reheater, low pressure height successively along flue gas flow Warm reheater, two-stage superheater, back-end ductwork heating surface, are provided with gas proportioning damper device in stack base, for distributing Exhaust gas volumn, to keep controlling the reheated steam outlet temperature in load range, flue gas is pooled together after controllable register again Introduce the equipment for denitrifying flue gas of left and right each through two back-end ductworks, reduce through denitrification apparatus and introduce air preheater after NOx, Flue entrance is disposed with flue gas recycled smoking mouth, and left and right two smoking pipeline introduces gas recirculating fan entrance mixing cigarette Flue gas is sent into body of heater from burner base by gas recirculating fan after dilatation depositing dust by road.
Additional aspect of the present utility model and advantage will be set forth in part in the description, partly will be from explained below In become obvious, or recognized by the practice of utility model.
Brief description
Fig. 1 is the structural representation of this utility model embodiment;
In figure 1- body of heater;2- afterbody bag wall system;3- denitrification apparatus;4- air preheater;5- flue gas recirculation system;6- Gas baffle;7- burner;8- horizontal flue bag wall system;9- water-cooling wall;10- high pressure final reheater;11- low-pressure final stage is again Hot device;12- two-stage superheater;13- division pendant superheater;14- finishing superheater;15- high pressure low temperature reheater;16- low temperature is low Pressure reheater;17- economizer.
Specific embodiment
Below with reference to accompanying drawing, this utility model is described in detail.
In conjunction with shown in Fig. 1, double reheat π type boiler disclosed in the present embodiment, including body of heater 1, afterbody bag wall system 2, de- Nitre device 3, air preheater 4, flue gas recirculation system 5, gas baffle 6, burner 7, horizontal flue bag wall system 8, body of heater 1 Inside it is provided with water-cooling wall 9, water-cooling wall 9 is connected with afterbody bag wall system 2 by horizontal flue bag wall system 8, and gas baffle 6 sets Put the lower end in afterbody bag wall system 2, denitrification apparatus 3 are connected with afterbody bag wall system 2, air preheater 4 respectively, burner 7 are connected with flue gas recirculation system 5, are arranged such, and can be used to reasonable distribution exhaust gas volumn, to keep controlling in load range Reheated steam outlet temperature, simultaneously through denitrification apparatus reduce NOx content.
For more reasonably distributing exhaust gas volumn, in horizontal flue bag wall system 8, it is provided with high pressure final reheater 10, low pressure Final reheater 11 and two-stage superheater 12, water-cooling wall 9 is provided with division pendant superheater 13 and finishing superheater 14, afterbody bag It is provided with high pressure low temperature reheater 15, low-temp low-pressure reheater 16 and economizer 17 in wall system 2, be provided with below denitrification apparatus Classification economizer.
Boiler water passes through respectively to be classified economizer and back-end ductwork economizer 2 enters water-cooling wall 9, by water-cooling wall 9 spiral Pipeloop and vertical tube coil region enter water-cooling wall outlet header, are connected by water-cooling wall outlet header and horizontal flue outlet header Pipe enters ceiling tube inlet header, enters separator by roof tube and afterbody bag wall system 2, the working medium of separator outlet is passed through Connecting tube respectively enter division pendant superheater 13, Late reworking, end cross superheater 14 finally enter boiler main vapour system, superelevation The steam discharge of cylinder pressure enters the inlet duct of high pressure low temperature reheater, and high pressure low temperature reheater, high pressure final reheater enter boiler High pressure reheating steam system, the steam discharge of high pressure cylinder enters the inlet duct of low-pressure low-temperature reheater, through low-pressure low-temperature reheater, Low-pressure final stage reheater enters boiler low pressure reheating steam system, to keep controlling the reheated steam outlet temperature in load range Degree.
For distributing exhaust gas volumn further, control the reheated steam outlet temperature in load range, be provided with water-cooling wall 9 Mixing header.
For ensureing the degree of freedom of burnout degree, burner may be selected one of SOFA burner and main burner, and adopts Reversely anistree double circle of contact arrangement form, SOFA burner is divided into high-order over-fire air and low level burnout degree, and burnout degree can be gone up respectively Under, swing;Main burner can swing up and down, and two kinds of burners all enable to export the degree of freedom of wind direction.
For ensureing the cycling and reutilization of flue gas, in flue gas recirculation system 5, it is provided with fume gas extraction port, fume gas extraction port is even Connect recirculation gas approach, recirculation gas approach connects gas recirculating fan, gas recirculating fan connects recirculation and goes out Mouth flue, recirculation exhaust pass connects burner 7 lower section recirculation spout, realizes the recirculation of flue gas.
For controlling the reheated steam outlet temperature in load range, division pendant superheater 13 and finishing superheater 14 further Between be provided with Late reworking, between division pendant superheater 13 and Late reworking, in finishing superheater 14 and rear screen mistake It is respectively arranged with direct-contact desuperheater between hot device.
Above example is the exemplary illustration to this patent, does not limit its protection domain, people in the art Member locally can also be changed to it, as long as no the spirit beyond this patent, in the protection domain of this patent.

Claims (7)

1. a kind of double reheat π type boiler it is characterised in that include body of heater (1), afterbody bag wall system (2), denitrification apparatus (3), Air preheater (4), flue gas recirculation system (5), gas baffle (6), burner (7), horizontal flue bag wall system (8), institute State and in body of heater (1), be provided with water-cooling wall (9), described water-cooling wall (9) passes through described horizontal flue bag wall system (8) and described afterbody Bag wall system (2) is connected, and described gas baffle (6) is arranged on the lower end of described afterbody bag wall system (2), described denitrification apparatus (3) it is connected with described afterbody bag wall system (2), described air preheater (4) respectively, described burner (7) and described flue gas Recirculating system (5) is connected.
2. a kind of double reheat π type boiler according to claim 1 is it is characterised in that described horizontal flue bag wall system (8) it is provided with high pressure final reheater (10), low-pressure final stage reheater (11) and two-stage superheater (12), described water-cooling wall (9) On be provided with division pendant superheater (13) and finishing superheater (14), be provided with high pressure low temperature in described afterbody bag wall system (2) Reheater (15), low-temp low-pressure reheater (16) and economizer (17), are provided with classification economizer below described denitrification apparatus.
3. a kind of double reheat π type boiler according to claim 2 it is characterised in that also include water-cooling wall outlet header, Horizontal flue outlet header, ceiling tube inlet header, separator, described economizer (17) is classified economizer and institute with described respectively State water-cooling wall (9) to connect, described water-cooling wall outlet header is connected with described water-cooling wall (9) and described horizontal flue outlet header respectively Connect, described ceiling tube inlet header is connected with described horizontal flue outlet header and described afterbody bag wall system (2) respectively, described Separator is connected with described afterbody bag wall system (2) and described division pendant superheater (13) respectively.
4. a kind of double reheat π type boiler according to claim 3 is it is characterised in that described burner includes SOFA combustion One of burner and main burner.
5. a kind of double reheat π type boiler according to claim 4 is it is characterised in that also including mixing header, described mixed Intersection case is connected with described water-cooling wall (9).
6. a kind of double reheat π type boiler according to claim 5 is it is characterised in that described flue gas recirculation system (5) Including fume gas extraction port, recirculation gas approach, gas recirculating fan, recirculation exhaust pass.
7. a kind of double reheat π type boiler according to claim 6 is it is characterised in that described division pendant superheater (13) It is provided with Late reworking and described finishing superheater (14) between, overheated with described rear screen in described division pendant superheater (13) Between device, between described finishing superheater (14) and described Late reworking, it is respectively arranged with direct-contact desuperheater.
CN201620990225.0U 2016-08-29 2016-08-29 A kind of double reheat π type boiler Active CN206001429U (en)

Priority Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108954293A (en) * 2018-07-17 2018-12-07 中国大唐集团科学技术研究院有限公司华东分公司 A kind of double reheat power generation sets Reheated-steam Temperature Control System and method that " graded combination " integrally controls

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108954293A (en) * 2018-07-17 2018-12-07 中国大唐集团科学技术研究院有限公司华东分公司 A kind of double reheat power generation sets Reheated-steam Temperature Control System and method that " graded combination " integrally controls

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