CN219414822U - Boiler system - Google Patents

Abstract

The present utility model provides a boiler system, comprising: the main boiler assembly comprises a main boiler unit, a main communication pipeline and a main induced draft fan which are sequentially communicated, and an exhaust outlet of the main induced draft fan is provided with a first main valve; the standby boiler assembly comprises a standby boiler unit, a standby communication pipeline and a standby induced draft fan which are sequentially communicated, and an exhaust outlet of the standby induced draft fan is provided with a first standby valve; the shared flue is connected with the first main valve and the first standby valve respectively; the smoke exhaust channel is communicated with the common flue and is used for exhausting smoke; the communication flue is communicated with the main communication pipeline and the standby communication pipeline respectively, the connecting point of the communication flue and the main communication pipeline is located at the upstream of the main induced draft fan, the connecting point of the communication flue and the standby communication pipeline is located at the upstream of the standby induced draft fan, the second main valve is arranged between the main communication pipeline and the communication flue, and the second standby valve is arranged between the standby communication pipeline and the communication flue.

Description

Boiler system

Technical Field

The utility model relates to the technical field of boilers, in particular to a boiler system.

Background

The boiler system generally comprises a plurality of boiler assemblies and a common flue, each boiler assembly generally comprises a blower, a boiler and an induced draft fan which are connected in sequence, the air outlets of the induced draft fans are respectively communicated with the common flue, and the common flue is communicated with the desulfurizing tower to carry out desulfurization emission on flue gas. When in heat supply operation, air from the outside is sent into a boiler by a blower, and the air sequentially passes through a boiler air door and a combustion chamber to become high-temperature flue gas; after the high-temperature flue gas absorbs heat by the boiler, the temperature is gradually reduced to below 180 ℃, and finally the flue gas is sent into a desulfurizing tower by an induced draft fan. Wherein, the air outlet of every draught fan sets up a valve in order to make corresponding draught fan and sharing flue intercommunication or shut off respectively. When the heating Ji Reliang requirement is large, induced draft fans of the plurality of boiler components are communicated with the common flue through valves; when the heat demand is less in non-heating seasons, the valves of part of the boiler assemblies are closed to reduce the total discharge of flue gas.

However, in the prior art, when the heat demand is low in the non-heating season, there may be a situation that the valves of the non-operating boiler assembly leak, and at this time, the flue gas in the common flue is easy to flow back to the boiler room of the non-operating boiler assembly to generate the phenomenon of smoke backing.

Disclosure of Invention

The utility model provides a boiler system, which aims to solve the problem that the boiler system in the prior art is easy to generate smoke reversal.

The present utility model provides a boiler system, comprising: the main boiler assembly comprises a main boiler unit, a main communication pipeline and a main induced draft fan which are sequentially communicated, wherein an exhaust outlet of the main induced draft fan is provided with a first main valve; the standby boiler assembly comprises a standby boiler unit, a standby communication pipeline and a standby induced draft fan which are sequentially communicated, wherein an exhaust outlet of the standby induced draft fan is provided with a first standby valve; the common flue is connected with the first main valve so as to be communicated with or cut off from the main induced draft fan, and is connected with the first standby valve so as to be communicated with or cut off from the standby induced draft fan; the smoke exhaust channel is communicated with the common flue and is used for exhausting smoke in the common flue; the communication flue is communicated with the main communication pipeline and the standby communication pipeline respectively, the connecting point of the communication flue and the main communication pipeline is located at the upstream of the main induced draft fan, the connecting point of the communication flue and the standby communication pipeline is located at the upstream of the standby induced draft fan, the second main valve is arranged between the main communication pipeline and the communication flue, and the second standby valve is arranged between the standby communication pipeline and the communication flue.

Further, the boiler system also comprises a pressure sensing part and a control part, wherein the pressure sensing part is arranged on the communication flue and is used for detecting the pressure of the communication flue; the control part is respectively and electrically connected with the pressure sensing part, the second main valve and the second standby valve, and can adjust the opening degree of the second main valve and the second standby valve through the data of the pressure sensing part.

Further, the main boiler unit comprises a main blower, a main boiler body and a main economizer which are sequentially arranged along the flow direction of the flue gas, and an air outlet of the main economizer is communicated with an air inlet of the main induced draft fan through a main communication pipeline; the spare boiler unit comprises a spare air blower, a spare boiler body and a spare economizer which are sequentially arranged along the flowing direction of the flue gas, and an air outlet of the spare economizer is communicated with an air inlet of a spare induced draft fan through a spare communication pipeline.

Further, a third main valve is arranged between the main economizer and the main communication pipeline so as to enable the main economizer to be communicated with or cut off from the main communication pipeline; a third standby valve is arranged between the standby economizer and the standby communication pipeline so as to enable the standby economizer to be communicated with or cut off from the standby communication pipeline.

Further, the boiler system further comprises: the main dust remover is arranged on the main communicating pipeline and is positioned between the main economizer and the main induced draft fan; the air inlet of the main dust remover is communicated with the air outlet of the main economizer, and the air outlet of the main dust remover is communicated with the air inlet of the main induced draft fan.

Further, the connection point of the main communication pipeline and the communication flue is positioned between the main dust remover and the main induced draft fan.

Further, the boiler system further comprises: the standby dust remover is arranged on the standby communicating pipeline and is positioned between the standby economizer and the standby induced draft fan; the air inlet of the standby dust remover is communicated with the air outlet of the standby coal economizer, and the air outlet of the standby dust remover is communicated with the air inlet of the standby induced draft fan.

Further, the connection point of the standby communication pipeline and the communication flue is positioned between the standby dust remover and the standby induced draft fan.

Further, a plurality of spare boiler assemblies are arranged, and the plurality of spare boiler assemblies are respectively communicated with the shared flue; the standby communication pipelines of the standby boiler assemblies are respectively communicated with the communication flues; a second standby valve is arranged between the communication flue and each standby communication pipeline.

Further, the boiler system further comprises: the desulfurizing tower is arranged between the common flue and the smoke exhaust channel and is used for desulfurizing the smoke.

By applying the technical scheme of the utility model, the condition of smoke pouring can be reduced or avoided when the spare boiler component is in an unoperated state. In the traditional technical scheme, when the heating season heat demand is relatively large, the main boiler component and the standby boiler component are both in a working state, and at the moment, the main boiler component and the standby boiler component cannot generate smoke reversing; when the heat demand is less in a non-heating season, the main boiler component is in a working state, the standby boiler component is in a stop operation state, namely, the first standby valve is in a closed state, at the moment, the condition that the first standby valve leaks possibly occurs, because the smoke generated by the main boiler component circulates into the shared flue and is discharged through the smoke discharging channel, the main induced draft fan generates positive exhaust pressure during operation, the two sides of the first standby valve corresponding to the standby induced draft fan form pressure differences, and when the condition that the first standby valve leaks occurs, the smoke in the shared flue can be leaked into the standby boiler component by the first standby valve to cause smoke pouring. In this application, when the spare boiler subassembly is in under the state of outage, guarantee that second main valve and second spare valve are in the open state, even the condition that first spare valve appears revealing, under the effect of main draught fan, in the partial flue gas that is in the shared flue circulates to main intercommunication pipeline through the intercommunication flue, reduces or avoids the flue gas in the shared flue to fall the condition in the spare boiler subassembly. Compared with the traditional technical scheme, the setting of this application can make the spare boiler subassembly be in when the state of outage, under the condition that first spare valve was revealed, the flue gas is circulated to main intercommunication pipeline by the intercommunication flue, reduces or avoids the condition that the spare boiler subassembly appears reversing the cigarette.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 illustrates a schematic construction of a boiler system having only one set of spare boiler modules provided by the present utility model;

FIG. 2 shows a schematic structural view of a boiler system having two sets of spare boiler modules according to the present utility model.

Wherein the above figures include the following reference numerals:

11. a main boiler unit;

111. a main blower; 112. a main boiler body; 113. a main economizer;

12. a main communication pipeline;

13. a main induced draft fan; 131. a first main valve;

21. a spare boiler unit;

211. a standby blower; 212. a spare boiler body; 213. a spare economizer;

22. a standby communication pipeline;

23. a standby induced draft fan; 231. a first backup valve;

30. a common flue;

40. a smoke exhaust passage;

50. a communicating flue; 51. a second main valve; 52. a second backup valve;

60. a pressure sensing part;

71. a third main valve; 72. a third backup valve;

81. a main dust remover; 82. a standby dust remover;

90. a desulfurizing tower.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, an embodiment of the present utility model provides a boiler system including a main boiler assembly, a backup boiler assembly, a common flue 30, a smoke discharge channel 40, a communication flue 50, a second main valve 51, and a second backup valve 52. The main boiler assembly comprises a main boiler unit 11, a main communication pipeline 12 and a main induced draft fan 13 which are sequentially communicated, wherein an exhaust outlet of the main induced draft fan 13 is provided with a first main valve 131. The standby boiler assembly comprises a standby boiler unit 21, a standby communication pipeline 22 and a standby induced draft fan 23 which are sequentially communicated, wherein an exhaust outlet of the standby induced draft fan 23 is provided with a first standby valve 231. The common flue 30 is connected with the first main valve 131 so that the common flue 30 is communicated with or cut off from the main induced draft fan 13, and the common flue 30 is connected with the first standby valve 231 so that the common flue 30 is communicated with or cut off from the standby induced draft fan 23; the smoke exhaust passage 40 communicates with the common flue 30, and the smoke exhaust passage 40 is used for exhausting smoke in the common flue 30. The communication flue 50 is respectively communicated with the main communication pipeline 12 and the standby communication pipeline 22, the connection point of the communication flue 50 and the main communication pipeline 12 is positioned at the upstream of the main induced draft fan 13, the connection point of the communication flue 50 and the standby communication pipeline 22 is positioned at the upstream of the standby induced draft fan 23, the second main valve 51 is arranged between the main communication pipeline 12 and the communication flue 50, and the second standby valve 52 is arranged between the standby communication pipeline 22 and the communication flue 50.

By applying the technical scheme of the utility model, the condition of smoke pouring can be reduced or avoided when the spare boiler component is in an unoperated state. In the traditional technical scheme, when the heating season heat demand is relatively large, the main boiler component and the standby boiler component are both in a working state, and at the moment, the main boiler component and the standby boiler component cannot generate smoke reversing; when the heat demand is less in a non-heating season, the main boiler component is in a working state, the standby boiler component is in a stop operation state, namely, the first standby valve is in a closed state, at the moment, the condition that the first standby valve leaks possibly occurs, because the smoke generated by the main boiler component circulates into the shared flue and is discharged through the smoke discharging channel, the main induced draft fan generates positive exhaust pressure during operation, the two sides of the first standby valve corresponding to the standby induced draft fan form pressure differences, and when the condition that the first standby valve leaks occurs, the smoke in the shared flue can be leaked into the standby boiler component by the first standby valve to cause smoke pouring. In this application, when the spare boiler subassembly is in under the state of outage, guarantee that second main valve 51 and second spare valve 52 are in the open state, even the condition that first spare valve 231 appears revealing, under the effect of main draught fan 13, be in the partial flue gas in shared flue 30 and circulate to main intercommunication pipeline 12 through intercommunication flue 50, reduce or avoid the flue gas in shared flue 30 to fall the condition in the spare boiler subassembly. Compared with the traditional technical scheme, the setting of this application can make the spare boiler subassembly be in when the state of outage, under the condition that first spare valve 231 was revealed, the flue gas circulated to main intercommunication pipeline 12 by intercommunication flue 50, reduces or avoids the condition that the spare boiler subassembly appears falling the cigarette.

Further, the boiler system further comprises a pressure sensing part 60 and a control part, wherein the pressure sensing part 60 is arranged on the communication flue 50 and is used for detecting the pressure of the communication flue 50; the control unit is electrically connected to the pressure sensing unit 60, the second main valve 51, and the second backup valve 52, respectively, and the control unit can adjust the opening degrees of the second main valve 51 and the second backup valve 52 by data of the pressure sensing unit 60. The pressure sensing portion 60 is configured to sense the pressure inside the communication flue 50, and when the pressure inside the communication flue 50 is too high, it is proved that the flue gas inside the communication flue 50 is too high, and at this time, the control portion controls the second main valve 51 and the second standby valve 52 to increase the opening of the second main valve 51 and the second standby valve 52, so as to ensure that the flue gas inside the communication flue 50 smoothly flows from the communication flue 50 to the main communication pipeline 12. And, when the spare boiler assembly is in the operating condition, guarantee that second main valve 51 and second spare valve 52 are in the closed state, through setting up second main valve 51 and second spare valve 52 can guarantee that when the spare boiler assembly is in the operating condition, main intercommunication pipeline 12 and reserve intercommunication pipeline 22 mutually independent, avoid or reduce the condition that both take place to scurry the cigarette.

Specifically, the main boiler unit 11 includes a main blower 111, a main boiler body 112 and a main economizer 113 sequentially arranged along the flow direction of the flue gas, and an air outlet of the main economizer 113 is communicated with an air inlet of the main induced draft fan 13 through a main communication pipeline 12; the standby boiler unit 21 comprises a standby blower 211, a standby boiler body 212 and a standby economizer 213 which are sequentially arranged along the flow direction of the flue gas, and an air outlet of the standby economizer 213 is communicated with an air inlet of a standby induced draft fan 23 through a standby communication pipeline 22. The main boiler unit 11 and the spare boiler unit 21 are identical in equipment, so that convenience in assembly of the whole system can be guaranteed, and when one of the main boiler unit 11 and the spare boiler unit 21 fails, heat supply can be guaranteed through operation of the other boiler unit. In the actual working process, the main boiler unit 11 and the standby boiler unit 21 can be arranged in the same boiler room, so that the equipment management is facilitated.

In the present embodiment, a third main valve 71 is provided between the main economizer 113 and the main communication pipe 12 to allow the main economizer 113 to communicate with or shut off from the main communication pipe 12; a third backup valve 72 is provided between the backup economizer 213 and the backup communication line 22 to allow the backup economizer 213 to communicate with or shut off from the backup communication line 22. The opening degrees of the third main valve 71 and the third reserve valve 72 are adjustable, so that the heating capacity of the boiler system can be conveniently adjusted. Meanwhile, when only the main boiler component works, the third standby valve 72 can be guaranteed to be in a closed state, and the condition of smoke pouring of the standby boiler component is further prevented; when only the spare boiler assembly is operated, the third main valve 71 is ensured to be in a closed state, and similarly, the main boiler assembly is prevented from being subjected to smoke dumping.

Further, the boiler system further comprises a main dust remover 81, wherein the main dust remover 81 is arranged on the main communication pipeline 12 and is positioned between the main economizer 113 and the main induced draft fan 13; the air inlet of the main dust remover 81 is communicated with the air outlet of the main economizer 113, and the air outlet of the main dust remover 81 is communicated with the air inlet of the main induced draft fan 13. The setting of main dust remover 81 can remove dust to the flue gas, reduces the condition that debris pollutes the interference to the low reaches part of main dust remover 81, guarantees the stability and the smoothness of part work of main dust remover 81 low reaches, also can guarantee the cleanliness of flue gas, reduces the pollution that the flue gas produced.

Specifically, the connection point of the main communication duct 12 and the communication flue 50 is located between the main dust collector 81 and the main induced draft fan 13. So set up, be convenient for connect the assembly to main communication pipeline 12 and intercommunication flue 50.

Further, the boiler system further comprises a standby dust remover 82, wherein the standby dust remover 82 is arranged on the standby communication pipeline 22 and is positioned between the standby economizer 213 and the standby induced draft fan 23; the air inlet of the standby dust remover 82 is communicated with the air outlet of the standby economizer 213, and the air outlet of the standby dust remover 82 is communicated with the air inlet of the standby induced draft fan 23. The setting of reserve dust remover 82 can remove dust to the flue gas, reduces the condition that debris pollutes the interference to the downstream part of reserve dust remover 82, guarantees the stability and the smoothness of the downstream part work of reserve dust remover 82, also can guarantee the cleanliness of flue gas, reduces the pollution of flue gas.

Specifically, the connection point of the backup communication pipe 22 and the communication flue 50 is located between the backup dust collector 82 and the backup induced draft fan 23. This arrangement can facilitate connection and assembly of the backup communication duct 22 and the communication flue 50.

Further, a plurality of spare boiler assemblies are provided, and the plurality of spare boiler assemblies are respectively communicated with the common flue 30; the standby communication pipelines 22 of the standby boiler assemblies are respectively communicated with the communication flues 50; a second backup valve 52 is provided between the communication stack 50 and each backup communication line 22. By the arrangement, the exhaust smoke amount can be ensured, and meanwhile, when the boiler system works, part of standby boiler components can be selectively in the off-line state, and the corresponding second standby valve 52 is closed to avoid or reduce the condition that the off-line boiler components are subjected to smoke dumping. Wherein, the spare boiler assembly can be provided with two groups, three groups or four groups, etc., as shown in fig. 2, in one embodiment of the present application, the spare boiler assembly is provided with two groups.

Further, the boiler system further comprises a desulfurizing tower 90, the desulfurizing tower 90 is arranged between the common flue 30 and the smoke discharging channel 40, and the desulfurizing tower 90 is used for desulfurizing the flue gas. The arrangement of the desulfurizing tower 90 can carry out desulfurization treatment on the flue gas, so that the pollution of the flue gas to the air is reduced, and meanwhile, the plurality of boiler components share the desulfurizing tower 90, so that the cost of a boiler system can be reduced.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A boiler system, the boiler system comprising:

the main boiler assembly comprises a main boiler unit (11), a main communication pipeline (12) and a main induced draft fan (13) which are sequentially communicated, wherein an exhaust outlet of the main induced draft fan (13) is provided with a first main valve (131);

the standby boiler assembly comprises a standby boiler unit (21), a standby communication pipeline (22) and a standby induced draft fan (23) which are sequentially communicated, wherein an exhaust outlet of the standby induced draft fan (23) is provided with a first standby valve (231);

-a common flue (30), said common flue (30) being connected to said first main valve (131) to communicate or cut off said common flue (30) to said main induced draft fan (13), said common flue (30) being connected to said first backup valve (231) to communicate or cut off said common flue (30) to said backup induced draft fan (23);

a smoke exhaust passage (40) communicated with the common flue (30), wherein the smoke exhaust passage (40) is used for exhausting smoke in the common flue (30);

the utility model provides a communication flue (50), second main valve (51) and second spare valve (52), communication flue (50) respectively with main intercommunication pipeline (12) with spare intercommunication pipeline (22) intercommunication, communication flue (50) with the tie point of main intercommunication pipeline (12) is located the upper reaches of main draught fan (13), communication flue (50) with the tie point of spare intercommunication pipeline (22) is located the upper reaches of spare draught fan (23), second main valve (51) set up main intercommunication pipeline (12) with between intercommunication flue (50), second spare valve (52) set up between spare intercommunication pipeline (22) with between intercommunication flue (50).

2. The boiler system according to claim 1, wherein,

the boiler system further comprises a pressure sensing part (60) and a control part, wherein the pressure sensing part (60) is arranged on the communication flue (50) and is used for detecting the pressure of the communication flue (50); the control part is electrically connected with the pressure sensing part (60), the second main valve (51) and the second standby valve (52) respectively, and the control part can adjust the opening degrees of the second main valve (51) and the second standby valve (52) through the data of the pressure sensing part (60).

3. The boiler system according to claim 1, wherein,

the main boiler unit (11) comprises a main blower (111), a main boiler body (112) and a main economizer (113) which are sequentially arranged along the flow direction of flue gas, and an air outlet of the main economizer (113) is communicated with an air inlet of a main induced draft fan (13) through a main communication pipeline (12);

the standby boiler unit (21) comprises a standby air blower (211), a standby boiler body (212) and a standby economizer (213) which are sequentially arranged along the flowing direction of flue gas, and an air outlet of the standby economizer (213) is communicated with an air inlet of the standby induced draft fan (23) through the standby communication pipeline (22).

4. A boiler system according to claim 3, wherein,

a third main valve (71) is arranged between the main economizer (113) and the main communication pipeline (12) so as to enable the main economizer (113) to be communicated with or cut off from the main communication pipeline (12);

a third backup valve (72) is arranged between the backup economizer (213) and the backup communication pipeline (22) so as to enable the backup economizer (213) to be communicated with or cut off from the backup communication pipeline (22).

5. A boiler system according to claim 3, wherein the boiler system further comprises:

a main dust collector (81) arranged on the main communication pipeline (12) and positioned between the main economizer (113) and the main induced draft fan (13); the air inlet of the main dust remover (81) is communicated with the air outlet of the main economizer (113), and the air outlet of the main dust remover (81) is communicated with the air inlet of the main induced draft fan (13).

6. The boiler system according to claim 5, wherein,

the connection point of the main communication pipeline (12) and the communication flue (50) is positioned between the main dust remover (81) and the main induced draft fan (13).

7. A boiler system according to claim 3, wherein the boiler system further comprises:

a standby dust collector (82) arranged on the standby communication pipeline (22) and positioned between the standby economizer (213) and the standby induced draft fan (23); the air inlet of the standby dust collector (82) is communicated with the air outlet of the standby economizer (213), and the air outlet of the standby dust collector (82) is communicated with the air inlet of the standby induced draft fan (23).

8. The boiler system according to claim 7, wherein,

the connection point of the standby communication pipeline (22) and the communication flue (50) is positioned between the standby dust remover (82) and the standby induced draft fan (23).

9. The boiler system according to claim 1, wherein,

the standby boiler assemblies are provided with a plurality of standby boiler assemblies, and the standby boiler assemblies are respectively communicated with the common flue (30); a plurality of standby communication pipelines (22) of the standby boiler assemblies are respectively communicated with the communication flues (50);

and one second standby valve (52) is arranged between the communication flue (50) and each standby communication pipeline (22).

10. The boiler system according to claim 1, wherein the boiler system further comprises:

and a desulfurization tower (90) arranged between the common flue (30) and the smoke discharge channel (40), wherein the desulfurization tower (90) is used for desulfurizing the smoke.