CN218409909U

CN218409909U - Circulating fluidized bed boiler

Info

Publication number: CN218409909U
Application number: CN202221852806.XU
Authority: CN
Inventors: 李斌; 张斌; 许春刚; 汤飞宇
Original assignee: Ningbo Jiufeng Thermal Power Co ltd
Current assignee: Ningbo Jiufeng Thermal Power Co ltd
Priority date: 2022-07-15
Filing date: 2022-07-15
Publication date: 2023-01-31
Anticipated expiration: 2032-07-15

Abstract

The utility model relates to a circulating fluidized bed boiler relates to circulating fluidized bed boiler technical field, for harmful gas such as inclusion sulfur dioxide in the flue gas that produces after solving circulating fluidized bed boiler coal-fired, directly discharge harmful human health, can cause the problem of harm to the environment. The absorption tower comprises a combustion tower and a cyclone separator, wherein the combustion tower is communicated with the cyclone separator, the cyclone separator is communicated with a smoke exhaust pipe, one end, deviating from the cyclone separator, of the smoke exhaust pipe is communicated with an absorption tower, the absorption tower is vertically arranged, the smoke exhaust pipe is inserted into the bottom end inside the absorption tower, the top end of the absorption tower is communicated with a plurality of air outlet pipes, the absorption tower is communicated with a powder pump, the powder pump is communicated with a storage box for storing an absorbent, and a diffusion assembly for diffusing the absorbent is arranged on the outside of the absorption tower. The method has the effects of carrying out desulfurization treatment on the sulfur-containing tail gas generated by the circulating fluidized bed, and protecting the environmental safety and the human health.

Description

Circulating fluidized bed boiler

Technical Field

The application relates to the technical field of circulating fluidized bed boilers, in particular to a circulating fluidized bed boiler.

Background

The circulating fluidized bed boiler is a novel high-efficiency low-pollution combustion device, repeatedly performs low-temperature combustion and desulfurization reaction through repeated circulation of dye and desulfurizer, and plays an important role in improving coal pollution.

In the related technology, a circulating fluidized bed boiler is designed, which comprises a hearth, a cyclone separator communicated with the hearth, and a material returning device communicated with the cyclone separator, wherein the material returning device is communicated with the hearth, and the cyclone separator is communicated with a smoke exhaust pipe. In the using process, fuel coal is added into the hearth through a coal dropping port of the hearth, smoke generated by combustion enters the cyclone separator, under the action of the cyclone separator, insufficiently combusted coal particles fall into the material returning device and are finally discharged into the hearth to be continuously combusted, and the smoke separated by the cyclone separator is discharged through the smoke discharge pipe.

In view of the above-mentioned related technologies, the inventor found that a large amount of harmful gases such as sulfur dioxide are mixed in the flue gas generated by burning coal, and the discharged harmful gases can cause damage to the environment and human body, and therefore, a circulating fluidized bed boiler capable of performing desulfurization tail gas treatment is needed.

SUMMERY OF THE UTILITY MODEL

In order to carry out desulfurization treatment to circulating fluidized bed boiler exhaust tail gas, improve the security of discharging tail gas, environmental protection and health, this application provides a circulating fluidized bed boiler.

The application provides a circulating fluidized bed boiler adopts following technical scheme:

the utility model provides a circulating fluidized bed boiler, includes combustion tower and cyclone, combustion tower and cyclone are linked together, cyclone intercommunication has the pipe of discharging fume, the one end intercommunication that the pipe of discharging fume deviates from cyclone has the absorption tower, the vertical setting of absorption tower, the pipe of discharging fume is inserted and is established into the inside bottom of absorption tower, absorption tower top intercommunication has a plurality of outlet ducts, the absorption tower intercommunication has the powder pump, powder pump intercommunication has the storage box that is used for saving the absorbent, be provided with the diffusion subassembly that is used for carrying out the diffusion with the absorbent on the absorption tower is outer.

By adopting the technical scheme, the coal briquette is combusted in the combustion tower, the combusted flue gas enters the cyclone separator, the cyclone separator separates particles from the gas, the gas enters the absorption tower through the smoke exhaust pipe, the powder pump extracts the absorbent in the storage box and introduces the absorbent into the absorption tower, and the absorbent powder is diffused through the diffusion assembly, so that the reaction range of the absorbent and the gas led out from the smoke exhaust pipe can be enlarged, the absorbent fully reacts with sulfur dioxide, the speed of desulfurization reaction is improved, the gas is effectively treated, and the environment and the health of human bodies are protected; through letting in the absorption tower bottom with the pipe of discharging fume, can prolong the reaction time of absorbent and sulfur dioxide, further improve desulfurization reaction's effect, the practicality is higher.

Preferably, the diffusion subassembly includes material pipe, a plurality of reposition of redundant personnel branch pipe, a plurality of mounting panel, a plurality of rotation motor and a plurality of diffusion carousel, reposition of redundant personnel branch pipe, mounting panel, rotation motor and four one-to-one settings of diffusion carousel, the material pipe is linked together with the powder pump, and is a plurality of reposition of redundant personnel branch connection is in the one end that the material pipe deviates from the powder pump, the reposition of redundant personnel branch pipe deviates from the one end and is linked together with the absorption tower of material pipe, and is a plurality of the mounting panel is all installed in the absorption tower inner wall, the rotation motor is installed in the mounting panel upper surface, the diffusion carousel is connected with the output shaft that rotates the motor, the diffusion carousel is used for accepting and diffusing the absorbent that gets into the absorption tower from reposition of redundant personnel branch pipe.

By adopting the technical scheme, the powder pump pumps the absorbent out of the storage box and discharges the absorbent into the material pipe, the absorbent is guided into different directions of the absorption tower through the plurality of branch flow pipes, and the absorbent separated from the branch flow pipes falls on the diffusion turntable; starting a rotating motor, driving the diffusion turntable to rotate by the rotating motor, and leading the absorbent falling on the diffusion turntable to drift around under the centrifugal force caused by the rotation of the diffusion turntable, so that the absorbent can be quickly dispersed and reacted with sulfur dioxide in a larger range; can increase desulfurization reaction's scope through setting up the diffusion subassembly, improve the utilization ratio and the desulfurization efficiency of absorbent, have higher practicality for the gas that finally discharges contains the sulphur content and further reduces, is of value to environmental protection and health.

Preferably, the guiding surface has been seted up to the one side that the diffusion carousel deviates from the rotation motor, the guiding surface sets up from the direction slope that the diffusion carousel centre of a circle department orientation deviates from reposition of redundant personnel branch pipe.

Through adopting above-mentioned technical scheme, set up the diffusion scope that the spigot surface can further increase the absorbent for can be towards landing all around during absorbent contact diffusion carousel, improved the practicality of this application.

Preferably, the end wall of one end of the diffusion rotary disc, which is far away from the guide surface, is connected with a plurality of cleaning brushes, the bristles of the cleaning brushes are arranged in the direction far away from the diffusion rotary disc, and the cleaning brushes are used for sweeping the absorbent falling on the surface of the mounting plate.

Through adopting above-mentioned technical scheme, when the diffusion carousel rotates, there is some absorbent to fall on the mounting panel, because blockking of mounting panel, these absorbents are difficult to take place to react with sulfur dioxide, the utilization ratio of absorbent and desulfurization reaction's speed are all lower, through setting up the brush cleaner, and make the brush cleaner rotate together with the diffusion carousel, when the brush cleaner rotates to the mounting panel, just can clean the absorbent on the mounting panel, the utilization ratio of absorbent has effectively been improved, desulfurization efficiency also can improve.

Preferably, a plurality of blast ports are formed in the bottom wall of the absorption tower, and each blast port is communicated with a blower.

By adopting the technical scheme, the blast orifice is formed, the blower is arranged, and the air flow can be injected into the absorption tower towards the interior of the absorption tower, so that the absorbent discharged into the absorption tower through the branch flow pipe can continuously float in the air and fully react with the smoke discharged from the smoke exhaust pipe, and the efficiency of desulfurization reaction is improved.

Preferably, the outlet of the smoke exhaust pipe is communicated with a plurality of vent pipes, the vent pipes are all bent, and one bent ends of the vent pipes are all arranged towards the direction deviating from the blast port.

Through adopting above-mentioned technical scheme, set up the breather pipe and can make the flue gas discharge to discharge fume and can move towards the direction that deviates from the tuyere behind the pipe, it is too big to have improved the interior wind-force of blast tuyere, leads to the flue gas to be difficult to discharge the pipe of discharging fume, and the problem that reaction rate is low has higher practicality.

Preferably, the smoke exhaust pipe is communicated with a cooling tank, the cooling tank is located between the cyclone separator and the absorption tower, and a plurality of water mist spray headers are arranged in the cooling tank.

Through adopting above-mentioned technical scheme, set up the cooling tank and carry out the cooling through the flue gas that the water smoke shower head orientation passes through from discharging fume intraductal, can improve follow-up desulfurization reaction's security, it is too high to improve the desulfurization reaction and stabilize, has the problem of potential safety hazard.

Preferably, one end of the air outlet pipe, which is far away from the absorption tower, is communicated with a bag-type dust collector.

By adopting the technical scheme, the sulfur-containing tail gas discharged into the absorption tower from the smoke discharge pipe can generate sulfate after reacting with the absorbent, the sulfate is tiny particles, and the tail gas can be further treated by arranging the bag-type dust remover, so that the finally discharged gas is safer.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the absorption tower and introducing the absorbent into the absorption tower, the reaction between the absorption tower and sulfur dioxide generated by filtering the fire coal by the circulating fluidized bed can be realized, the safety of tail gas emission is improved, and the protection of human health and environmental safety are facilitated;

2. can spread the absorbent that gets into the absorption tower through setting up diffusion subassembly to make the absorbent can scatter more spaces in the absorption tower, thereby increase and gaseous sulfur dioxide's that mix with reaction range, further improved the desulfurization reaction's of this application effect, be of value to environmental protection safety and health.

Drawings

Fig. 1 is a schematic structural view of a circulating fluidized bed boiler according to an embodiment of the present application.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a partially enlarged view of fig. 1 at B.

Description of reference numerals: 1. a combustion tower; 2. a cyclone separator; 3. a smoke exhaust pipe; 31. a breather pipe; 4. an absorption tower; 41. an air outlet pipe; 42. a powder pump; 43. a storage box; 44. a tuyere; 45. a blower; 5. a diffusion component; 51. a material pipe; 52. a branch pipe; 53. mounting a plate; 54. rotating the motor; 55. a diffusion turntable; 551. a guide surface; 552. cleaning with a brush; 6. a cooling tank; 61. a water mist spray header; 7. a bag-type dust collector.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a circulating fluidized bed boiler. Referring to fig. 1, a circulating fluidized bed boiler includes a combustion tower 1 and a cyclone 2, the combustion tower 1 and the cyclone 2 being in communication with each other. In this embodiment, the combustion tower 1 and the cyclone separator 2 are both vertically arranged, a material returning device is communicated with the lower portion of the cyclone separator 2, the material returning device is communicated with the cyclone separator 2, and particles separated by the cyclone separator 2 are introduced into the combustion tower 1 to be combusted again.

Referring to fig. 1 and 2, 2 top intercommunications of cyclone have the pipe 3 of discharging fume that is used for discharging the flue gas, and the intercommunication has cooling tank 6 on the pipe 3 of discharging fume, and the intercommunication has a plurality of water smoke shower heads 61 that are used for spraying water smoke towards high temperature flue gas in cooling tank 6, makes gaseous cooling from this, reduces follow-up desulfurization reaction's risk, improves the security of this application.

Referring to fig. 1, one end of the smoke exhaust pipe 3, which is far away from the cyclone separator 2, is communicated with an absorption tower 4 for treating smoke, the absorption tower 4 is vertically arranged, and the smoke exhaust pipe 3 is bent and inserted into the bottom of the absorption tower 4. A plurality of tuyeres 44 have been seted up to the bottom wall of absorption tower 4, and a plurality of tuyeres 44 are along 3 circumferential direction evenly distributed of tub of discharging fume, and each tuyeres 44 all communicates and is used for letting in the air-blower 45 of air current in the absorption tower 4.

Referring to fig. 1, there are a plurality of ventilation pipes in the export of tub 3 of discharging fume through welded connection, and a plurality of ventilation pipes all buckle the setting, and buckle the direction setting that the end orientation deviates from tuyere 44 to can improve the air current influence of discharging fume tub 3 interior gas by air-blower 45, be difficult to the exhaust problem, improve the practicality of this application.

Referring to fig. 1 and 3, a storage tank 43 for storing the absorbent is arranged outside the absorption tower 4, the storage tank 43 is communicated with a powder pump 42 for pumping away the absorbent, and one end of the powder pump 42, which is far away from the storage tank 43, is communicated with a diffusion assembly 5 for diffusing the absorbent in the absorption tower 4 so as to improve the reaction range of the absorbent and sulfur dioxide in the gas. In this embodiment, the absorbent is slaked lime powder, and can react with sulfur dioxide to generate calcium sulfate.

Referring to fig. 1 and 3, the diffusion assembly 5 includes a material pipe 51, a plurality of branch pipes 52, a plurality of mounting plates 53, a plurality of rotating motors 54, and a plurality of diffusion disks 55, and the branch pipes 52, the mounting plates 53, the rotating motors 54, and the diffusion disks 55 are disposed in one-to-one correspondence. Material pipe 51 is linked together through welding and the one end that powder pump 42 deviates from storage tank 43, and the one end that material pipe 51 deviates from powder pump 42 is linked together with a plurality of reposition of redundant personnel branch pipes 52, and in this embodiment, reposition of redundant personnel branch pipe 52 has four, and four reposition of redundant personnel branch pipes 52 are along the outer wall evenly distributed of absorption tower 4, and the one end that each reposition of redundant personnel branch pipe 52 deviates from material pipe 51 all is linked together with absorption tower 4, and the communicating point is located the one end outer wall that absorption tower 4 deviates from air-blower 45.

Referring to fig. 1 and 3, the mounting plates 53 are all connected to the inner wall of the absorption tower 4 by welding, the base of the rotating motor 54 is connected to the upper surface of the mounting plate 53 by welding, and the output shaft of the rotating motor 54 is arranged in a direction away from the mounting plate 53. Diffusion dial 55 is connected to the output shaft of rotating motor 54 by welding, and diffusion dial 55 and the output shaft of rotating motor 54 are coaxially arranged, so that the absorbent discharged from each branch pipe 52 can fall on diffusion dial 55.

Referring to fig. 1 and 3, a guide surface 551 is opened at an end of the diffusion rotary disk 55 facing away from the rotating motor 54, and the guide surface 551 is inclined from a center of the diffusion rotary disk 55 toward a direction facing away from the branch flow duct 52, so that the diffusion effect of the absorbent powder can be further improved.

Referring to fig. 1 and 3, a plurality of cleaning brushes 552 are connected to one side of the diffusion rotary disc 55, which is far away from the branch pipe 52, through gluing, the cleaning brushes 552 rotate along with the diffusion rotary disc 55, and the cleaning brushes 552 are used for cleaning absorbent powder scattered on the mounting plate 53, so that the utilization rate of the absorbent and the efficiency of the desulfurization reaction can be improved.

Referring to fig. 1, one end of the absorption tower 4, which is far away from the blower 45, is communicated with a plurality of gas outlet pipes 41, and one end of the gas outlet pipes 41, which is far away from the absorption tower 4, is converged and communicated with a bag-type dust collector 7 for performing dust removal treatment on the reacted gas, so that the safety of the discharged gas is further improved.

The implementation principle of the circulating fluidized bed boiler in the embodiment of the application is as follows: flue gas generated by burning coal in the combustion tower 1 enters the cyclone separator 2, and after being separated by the cyclone separator 2, the gas is discharged from the smoke discharge pipe 3; after the gas enters the cooling tank 6, the water mist spray header 61 sprays water mist to cool the high-temperature gas; the gas is discharged to the bottom of the absorption tower 4 along the length direction of the smoke exhaust pipe 3 after passing through the cooling tank 6, and flows towards the upper part of the absorption tower 4 under the action of the blower 45; the powder pump 42 pumps the absorbent out of the storage tank 43, and the absorbent is dispersed into the absorption tower 4 through the diffusion assembly 5 and reacts with sulfur dioxide in the gas to generate calcium sulfate powder particles; the generated calcium sulfate particles are introduced into the gas outlet pipe 41 along with the residual gas and enter the bag-type dust collector 7 for dust removal treatment, so that the sulfur content of the finally discharged gas is reduced.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a circulating fluidized bed boiler, includes combustion tower (1) and cyclone (2), combustion tower (1) and cyclone (2) are linked together, cyclone (2) intercommunication has smoke exhaust pipe (3), its characterized in that: the utility model discloses a cyclone separator, including discharge fume pipe (3), one end intercommunication that deviates from cyclone (2) of pipe (3) is had absorption tower (4), absorption tower (4) vertical setting, discharge fume pipe (3) and insert and establish the inside bottom of absorption tower (4), absorption tower (4) top intercommunication has a plurality of outlet ducts (41), absorption tower (4) intercommunication has powder pump (42), powder pump (42) intercommunication has storage box (43) that are used for storing the absorbent, absorption tower (4) are provided with outward and are used for carrying out diffusion subassembly (5) that diffuse with the absorbent.

2. A circulating fluidized bed boiler according to claim 1, characterized in that: diffusion subassembly (5) include material pipe (51), a plurality of reposition of redundant personnel branch pipe (52), a plurality of mounting panel (53), a plurality of rotation motor (54) and a plurality of diffusion carousel (55), four one-to-one settings of reposition of redundant personnel branch pipe (52), mounting panel (53), rotation motor (54) and diffusion carousel (55), material pipe (51) are linked together with powder pump (42), and are a plurality of reposition of redundant personnel branch pipe (52) are connected in the one end that deviates from powder pump (42) of material pipe (51), the one end that deviates from material pipe (51) of reposition of redundant personnel branch pipe (52) is linked together with absorption tower (4), and is a plurality of absorption tower (4) inner wall is all installed in mounting panel (53), install in mounting panel (53) upper surface rotation motor (54), diffusion carousel (55) are connected with the output shaft that rotates motor (54), diffusion carousel (55) are used for accepting and diffusing the absorbent that gets into absorption tower (4) from reposition of redundant personnel branch pipe (52).

3. A circulating fluidized bed boiler according to claim 2, characterized in that: one side of the diffusion rotary disc (55) departing from the rotating motor (54) is provided with a guide surface (551), and the guide surface (551) is obliquely arranged from the circle center of the diffusion rotary disc (55) towards the direction departing from the branch flow pipe (52).

4. A circulating fluidized bed boiler according to claim 2, characterized in that: the end wall of one end of the diffusion rotary disc (55) which is far away from the guide surface (551) is connected with a plurality of cleaning brushes (552), the bristles of the cleaning brushes (552) are arranged in the direction which is far away from the diffusion rotary disc (55), and the cleaning brushes (552) are used for sweeping the absorbent falling on the surface of the mounting plate (53).

5. A circulating fluidized bed boiler according to claim 1, characterized in that: a plurality of blast holes (44) are formed in the bottom wall of the absorption tower (4), and each blast hole (44) is communicated with an air blower (45).

6. A circulating fluidized bed boiler according to claim 5, characterized in that: the exit intercommunication of discharging fume pipe (3) has a plurality of breather pipes (31), and is a plurality of breather pipe (31) all buckle to set up, and is a plurality of the one end that breather pipe (31) buckled all sets up towards the direction that deviates from tuyere (44).

7. A circulating fluidized bed boiler according to claim 1, characterized in that: the smoke exhaust pipe (3) is communicated with a cooling tank (6), the cooling tank (6) is located between the cyclone separator (2) and the absorption tower (4), and a plurality of water mist spray headers (61) are arranged in the cooling tank (6).

8. A circulating fluidized bed boiler according to claim 1, characterized in that: and one end of the air outlet pipe (41) departing from the absorption tower (4) is communicated with a bag-type dust collector (7).