CN216693507U

CN216693507U - Circulating fluidized bed boiler

Info

Publication number: CN216693507U
Application number: CN202123452038.7U
Authority: CN
Inventors: 朱俊
Original assignee: Zhejiang Qianyao Environmental Engineering Co ltd
Current assignee: Zhejiang Qianyao Environmental Engineering Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-07
Anticipated expiration: 2031-12-31

Abstract

The application relates to a circulating fluidized bed boiler, relates to the technical field of boilers, and comprises a hearth, a first cyclone separator, a material returning device and an economizer. The first cyclone separator is connected with the hearth, the material returning device and the coal economizer, and one side of the material returning device, which is far away from the first cyclone separator, is connected with the hearth. One side of first cyclone is provided with second cyclone and mounting bracket, and first cyclone and second cyclone all link to each other with the mounting bracket. The mounting frame is provided with a first fixing component and a second fixing component. This application passes through the setting of mounting bracket, when first cyclone is changed to needs, pull down first cyclone, with the second cyclone on the mounting bracket change can. Due to the arrangement of the mounting frame and the second cyclone separator, the replacement efficiency of replacing the first cyclone separator is improved, and the influence of the abrasion of pulverized coal on the inner side wall of the first cyclone separator on the working efficiency of the boiler is reduced.

Description

Circulating fluidized bed boiler

Technical Field

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

Background

The circulating fluidized bed boiler is a coal-fired boiler, and its main structure includes furnace chamber, cyclone separator, material returning device and coal economizer. The pulverized coal is combusted in the hearth, and the incompletely combusted pulverized coal passes through the cyclone separator to realize the separation of the flue gas and the pulverized coal. The flue gas enters an economizer to transfer heat; the coal powder falls into the material returning device and finally returns to the hearth to be continuously combusted.

In view of the above-mentioned related art, the inventors believe that, when the pulverized coal is separated in the cyclone, the pulverized coal is greatly abraded to the inner sidewall of the cyclone due to the impact on the inner sidewall by the centrifugal force. The cyclone separator is usually in a closed arrangement, and when the cyclone separator needs to be replaced, the operation steps are complicated, the time for stopping the machine is long, and the working efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

In order to reduce the influence of the wearing and tearing of buggy to cyclone inside wall to boiler work efficiency, 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 furnace, first cyclone, returning charge ware and economizer, first cyclone links to each other with furnace, returning charge ware and economizer, the returning charge ware is kept away from and is linked to each other with one side that first cyclone links to each other with furnace, one side of first cyclone is provided with second cyclone and mounting bracket, first cyclone and second cyclone all link to each other with the mounting bracket, be provided with the fixed subassembly of second that is used for fixed first cyclone and is used for fixed second cyclone on the mounting bracket.

Through adopting above-mentioned technical scheme, when first cyclone needs to be changed, start first fixed subassembly earlier and fix first cyclone, dismantle first cyclone again, promote the mounting bracket, remove second cyclone to corresponding position, it is fixed with second cyclone, accomplish first cyclone's change promptly. Through the setting of mounting bracket and second cyclone, effectively improved the convenience of changing first cyclone, reduced the wearing and tearing of buggy to first cyclone inside wall to boiler work efficiency's influence.

Optionally, the first fixing assembly and the second fixing assembly each include two arc-shaped abutting plates and a driving member for driving the two abutting plates to approach each other; the two arc-shaped abutting plates of the first fixing component are respectively positioned at two sides of the first cyclone separator and abut against the first cyclone separator; the two arc-shaped abutting plates of the second fixing component are respectively positioned at two sides of the second cyclone separator and abut against the second cyclone separator.

Through adopting above-mentioned technical scheme, when first cyclone and second cyclone need be fixed, start the driving piece, two arcs of drive support tight board for the arc supports tight board and supports tightly on first cyclone and second cyclone's lateral wall, can accomplish fixedly. The arc supports the setting of tight board for the contact of first fixed subassembly and first cyclone and the fixed subassembly of second and second cyclone is inseparabler, has improved the fixed effect of the fixed subassembly of first fixed subassembly and second.

Optionally, the driving part comprises a bidirectional screw rod rotatably arranged on the mounting frame and a driving motor for driving the bidirectional screw rod to rotate, and an output shaft of the driving motor is fixedly connected with the bidirectional screw rod; and both ends of the bidirectional screw rod are in threaded connection with matching blocks, one of the matching blocks is connected with one of the arc abutting plates, and the other matching block is connected with the other arc abutting plate.

Through adopting above-mentioned technical scheme, when two arcs of needs drive support the tight board and be close to each other, start driving motor, driving motor drive two-way lead screw rotates, and two-way lead screw drives the cooperation piece that is located two-way lead screw both ends and is close to each other, and two arcs of cooperation piece drive support the tight board and are close to each other. The two arc abutting plates are driven to be close to each other through the driving motor, the installation mode is simple, and the operation is convenient.

Optionally, the first cyclone separator and the second cyclone separator are respectively provided with three first flange plates, the furnace chamber, the material returning device and the economizer are respectively and correspondingly provided with a second flange plate, and the first flange plates are connected with the second flange plates through bolts.

Through adopting above-mentioned technical scheme, when first cyclone is dismantled to needs, with the bolt from first ring flange and second ring flange on pull down can. Through the mode of first ring flange, second ring flange and bolt fastening, convenient dismantlement.

Optionally, a sealing ring is arranged between the first flange and the second flange.

Through adopting above-mentioned technical scheme, the clearance between first ring flange and the second ring flange can be filled in the setting of sealing ring, has improved the gas tightness.

Optionally, a sliding assembly used for driving the mounting frame to move is arranged on the mounting frame and comprises two sliding rails, rollers are arranged at the bottom of the mounting frame and are connected to the sliding rails in a rolling mode, a driving hydraulic cylinder is further arranged on the sliding rails, and a piston rod of the driving hydraulic cylinder is connected with the mounting frame.

By adopting the technical scheme, when the mounting frame needs to be moved, the hydraulic cylinder is started and pushes the mounting frame to slide on the slide rail. The arrangement of the sliding assembly improves the convenience of the movable mounting rack.

Optionally, the inner side walls of the first cyclone separator and the second cyclone separator are both provided with wear-resistant layers.

Through adopting above-mentioned technical scheme, the setting up of wearing layer has prolonged the life of first cyclone and second cyclone inside wall.

Optionally, an elastic part is arranged between the wear-resistant layer and the inner side walls of the first cyclone separator and the second cyclone separator.

Through adopting above-mentioned technical scheme, the elastic component can cushion the impact force of buggy striking on first cyclone and second cyclone to alleviate the wearing and tearing of buggy to first cyclone and second cyclone.

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

1. in the application, through the arrangement of the mounting frame and the second cyclone separator, when the first cyclone separator needs to be replaced, the first cyclone separator is detached, the mounting frame is pushed, and the second cyclone separator is moved to a corresponding position and fixed, so that the efficiency of replacing the first cyclone separator is effectively improved;

2. in the further arrangement of the cyclone separator, the first flange plate, the second flange plate and the bolts are arranged, so that the first cyclone separator and the second cyclone separator are convenient to disassemble and assemble, and the efficiency of replacing the first cyclone separator is further improved;

3. in this application further sets up, through the setting of slip subassembly, be convenient for promote the mounting bracket, improved the convenience that promotes the mounting bracket.

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 schematic structural diagram of a circulating fluidized bed boiler according to an embodiment of the present application, illustrating a connection relationship between a hydraulic cylinder and a mounting frame;

FIG. 3 is a partial schematic structural view of a mounting bracket in an embodiment of the present application, illustrating a connection relationship between a second fixing assembly and a second cyclone separator;

FIG. 4 is a sectional view of a first cyclone separator in an embodiment of the present application;

fig. 5 is an enlarged view of a portion a in fig. 1.

Description of reference numerals: 1. a hearth; 2. a first cyclone separator; 3. a material returning device; 4. a coal economizer; 5. a second cyclone separator; 6. a mounting frame; 7. a fixing assembly; 71. a first fixed component; 72. a second fixed component; 73. an arc-shaped abutting plate; 74. a drive member; 741. a bidirectional screw rod; 742. a drive motor; 743. a matching block; 8. a sliding assembly; 81. a slide rail; 82. a roller; 83. a hydraulic cylinder; 91. a first flange plate; 92. a second flange plate; 93. a bolt; 94. a seal ring; 95. a wear layer; 96. an elastic member; 97. a connecting rod; 98. a support platform; 99. a blocking plate; 101. and (4) mounting the groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a circulating fluidized bed boiler. Referring to fig. 1, the circulating fluidized bed boiler includes a furnace 1, a first cyclone 2, a back feeder 3, and an economizer 4. The first cyclone separator 2 is connected with the hearth 1, the material returning device 3 and the coal economizer 4, and one side of the material returning device 3, which is far away from the side connected with the first cyclone separator 2, is fixedly connected with the hearth 1.

Referring to fig. 1 and 2, a support platform 98 is disposed at the bottom of the first cyclone separator 2, and a mounting bracket 6 and a sliding assembly 8 for driving the mounting bracket 6 to slide are disposed on the support platform 98. The sliding assembly 8 comprises two sliding rails 81 arranged along the length direction of the supporting platform 98, a roller 82 is fixedly mounted at the bottom of the mounting rack 6, and the roller 82 is connected to the sliding rails 81 in a rolling manner. The supporting platform 98 is also fixedly provided with a hydraulic cylinder 83 for pushing the mounting frame 6, a piston rod of the hydraulic cylinder 83 is fixedly provided with a fixing block, and the fixing block is fixedly connected with the mounting frame 6.

Referring to fig. 1 and 2, the second cyclone 5 is provided on the mounting frame 6. The mounting frame 6 is provided with a first fixing assembly 71 for fixing the first cyclone separator 2 and a second fixing assembly 72 for fixing the second cyclone separator 5. The first fixing assembly 71 and the second fixing assembly 72 each include two arc abutting plates 73 and a driving member 74 for driving the two arc abutting plates 73 to approach each other.

Referring to fig. 1 and 2, two arc-shaped abutting plates 73 in the first fixing assembly 71 are respectively located at two sides of the first cyclone separator 2 and abut against the outer sidewall of the first cyclone separator 2. Two arc-shaped abutting plates 73 in the second fixing assembly 72 are respectively located at two sides of the second cyclone separator 5 and abut against the outer side wall of the second cyclone separator 5.

Referring to fig. 1 and 3, the driving member 74 includes a driving motor 742 fixedly mounted on the mounting frame 6, a mounting groove 101 is formed on the mounting frame 6, and a bidirectional screw 741 is rotatably connected in the mounting groove 101. An output shaft of the driving motor 742 penetrates through the mounting frame 6, extends into the mounting groove 101 and is fixedly connected with the bidirectional screw rod 741.

Referring to fig. 1 and 3, both ends of the bidirectional screw 741 are both in threaded connection with a matching block 743, a connecting rod 97 is welded on the matching block 743, and one end of the connecting rod 97 far away from the end connected with the matching block 743 is fixedly connected with the arc-shaped abutting plate 73.

Referring to fig. 3, when two arc abutting plates 73 need to be driven to approach each other, the driving motor 742 is started, the driving motor 742 drives the bidirectional screw 741 to rotate, the bidirectional screw 741 drives the matching blocks 743 at two ends of the bidirectional screw 741 to approach each other, and the matching blocks 743 drive the two arc abutting plates 73 to approach each other through the connecting rod 97.

Referring to fig. 1 and 4, the inner side walls of the first cyclone separator 2 and the second cyclone separator 5 are both fixedly provided with a wear-resistant layer 95, and a plurality of elastic members 96 are arranged between the wear-resistant layer 95 and the inner side walls. In the embodiment of the present application, the wear-resistant layer 95 is made of silicon carbide; the elastic member 96 is a spring, one end of which is fixedly connected with the inner side wall and the other end of which is fixedly connected with the wear-resistant layer 95. The inner side walls of the first cyclone separator 2 and the second cyclone separator 5 are fixedly connected with a blocking plate 99 used for preventing coal dust from entering a gap between the wear-resistant layer 95 and the inner side wall, and the blocking plate 99 is positioned at the tops of the first cyclone separator 2 and the second cyclone separator 5.

Referring to fig. 1 and 4, the provision of the abrasion resistant layer 95 can extend the time for replacing the first and

second cyclones

2 and 5. The elastic member 96 is arranged to buffer the impact force of the pulverized coal striking the wear-resistant layer 95, thereby reducing the abrasion of the pulverized coal to the wear-resistant layer 95.

Referring to fig. 1 and 5, three first flange plates 91 are fixedly mounted on the first cyclone separator 2 and the second cyclone separator 5, and a second flange plate 92 is correspondingly arranged on the furnace 1, the material returning device 3 and the economizer 4. Bolts 93 are arranged between the first flange 91 and the second flange 92 in a penetrating way and are fixedly connected through the bolts 93. A sealing ring 94 is disposed between the first flange 91 and the second flange 92, and when the bolts 93 are tightened, the sealing ring 94 is pressed by the first flange 91 and the second flange 92 against a gap between the first flange 91 and the second flange 92. In the embodiment of the present application, the sealing ring 94 is made of graphite sealing ring.

Referring to fig. 1 and 5, the first cyclone separator 2 and the second cyclone separator 5 are fixed to the furnace 1, the material returning device 3 and the economizer 4 by a first flange 91, a second flange 92 and bolts 93. Compared with a welding mode, the assembly and disassembly are more convenient and faster. The sealing ring 94 is provided to fill the gap between the first flange 91 and the second flange 92, thereby improving the airtightness.

The implementation principle of the circulating fluidized bed boiler in the embodiment of the application is as follows: pulverized coal enters a hearth 1, is ignited through an ignition device in the hearth 1 and is combusted, and flue gas generated after pulverized coal combustion enters a first cyclone separator 2; the pulverized coal mixed in the flue gas strikes the wear-resistant layer 95 under the action of centrifugal force in the first cyclone separator 2, and finally returns to the hearth 1 again for secondary combustion through the material returning device 3 under the action of wind force. The flue gas enters the economizer 4 in the first cyclone separator 2 for heat transfer.

When the wear-resistant layer 95 in the first cyclone separator 2 is seriously worn and needs to be replaced, the boiler is stopped, the first fixing assembly 71 is started, the two arc-shaped abutting plates 73 abut against the outer side wall of the first cyclone separator 2, and the first cyclone separator 2 is fixed; then the bolt 93 on the first cyclone separator 2 is detached, and the sliding assembly 8 is started, so that the second cyclone separator 5 moves to the corresponding position, and the bolt 93 on the second cyclone separator 5 is fixed, and then the replacing process can be completed. The replacement efficiency is effectively improved, the downtime is greatly shortened, and the influence of the abrasion of the pulverized coal on the inner side wall of the first cyclone separator 2 on the working efficiency of the boiler is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, 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 furnace (1), first cyclone (2), returning charge ware (3) and economizer (4), first cyclone (2) link to each other with furnace (1), returning charge ware (3) and economizer (4), returning charge ware (3) are kept away from the one side that links to each other with first cyclone (2) and are linked to each other its characterized in that with furnace (1): one side of first cyclone (2) is provided with second cyclone (5) and mounting bracket (6), first cyclone (2) and second cyclone (5) all link to each other with mounting bracket (6), be provided with on mounting bracket (6) and be used for fixed first cyclone (2) first fixed subassembly (71) and be used for fixed second cyclone (5) second fixed subassembly (72).

2. A circulating fluidized bed boiler according to claim 1, characterized in that: the first fixing assembly (71) and the second fixing assembly (72) respectively comprise two arc-shaped abutting plates (73) and a driving piece (74) for driving the two abutting plates to approach each other; the two arc-shaped abutting plates (73) of the first fixing component (71) are respectively positioned at two sides of the first cyclone separator (2) and abut against the first cyclone separator (2); the two arc-shaped abutting plates (73) of the second fixing component (72) are respectively positioned at two sides of the second cyclone separator (5) and abut against the second cyclone separator (5).

3. A circulating fluidized bed boiler according to claim 2, characterized in that: the driving piece (74) comprises a bidirectional screw rod (741) rotatably arranged on the mounting frame (6) and a driving motor (742) for driving the bidirectional screw rod (741) to rotate, and an output shaft of the driving motor (742) is fixedly connected with the bidirectional screw rod (741); both ends of the bidirectional screw rod (741) are in threaded connection with matching blocks (743), one matching block (743) is connected with one arc-shaped abutting plate (73), and the other matching block (743) is connected with the other arc-shaped abutting plate (73).

4. A circulating fluidized bed boiler according to claim 1, characterized in that: all be provided with three first ring flanges (91) on first cyclone (2) and second cyclone (5), all be provided with one second ring flange (92) on furnace (1), returning charge ware (3) and economizer (4) correspondingly, first ring flange (91) link to each other through bolt (93) with second ring flange (92).

5. A circulating fluidized bed boiler according to claim 4, characterized in that: and a sealing ring (94) is arranged between the first flange plate (91) and the second flange plate (92).

6. A circulating fluidized bed boiler according to claim 1, characterized in that: be provided with on mounting bracket (6) and be used for driving sliding subassembly (8) that mounting bracket (6) removed, sliding subassembly (8) include two slide rails (81), the bottom of mounting bracket (6) is provided with gyro wheel (82), gyro wheel (82) roll connection is on slide rail (81), still be provided with actuating cylinder (83) on slide rail (81), actuating cylinder (83)'s piston rod links to each other with mounting bracket (6).

7. A circulating fluidized bed boiler according to claim 1, characterized in that: and the inner side walls of the first cyclone separator (2) and the second cyclone separator (5) are provided with wear-resistant layers (95).

8. A circulating fluidized bed boiler according to claim 7, characterized in that: and an elastic piece (96) is arranged between the wear-resistant layer (95) and the inner side walls of the first cyclone separator (2) and the second cyclone separator (5).