CN219607063U - Circulating fluidized bed boiler - Google Patents

Abstract

The utility model discloses a circulating fluidized bed boiler, which comprises a bracket and a fluidized bed boiler mechanism arranged on the outer wall of the bracket, wherein the fluidized bed boiler mechanism comprises a boiler component, a fluidized bed component and a circulating component; the boiler assembly comprises a boiler body, a burner, a screen plate and a feed inlet, wherein the outer wall of the bracket is fixedly connected with the boiler body, the burner is arranged on the inner wall of the boiler body, the screen plate is fixedly connected with the inner wall of the boiler body above the burner, and the feed inlet is formed in the side wall of the boiler body; the fluidized bed assembly comprises a first-stage fluidized bed, a connecting bent pipe, a second-stage fluidized bed, a third-stage fluidized bed and a connecting pipe, wherein the top end of the furnace body is fixedly connected with the first-stage fluidized bed fixedly connected with the outer wall of the support, the first-stage fluidized bed, the second-stage fluidized bed and the third-stage fluidized bed are arranged at the positions, and the burnt gas of the fuel sequentially passes through the first-stage fluidized bed, the second-stage fluidized bed and the third-stage fluidized bed, so that the burnt length of the gas is greatly increased.

Description

Circulating fluidized bed boiler

Technical Field

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

Background

The circulating fluidized bed boiler adopts clean coal combustion technology with highest industrialization degree, adopts fluidized combustion, mainly comprises two parts of a combustion chamber and a circulating furnace, and becomes an advanced technology for utilizing the energy of the flame-retardant solid fuel.

Through search, patent publication No.: the utility model discloses a circulating fluidized bed boiler structure, which relates to the technical field of boilers and comprises a tail flue, wherein the tail flue comprises a membrane type water-cooled wall body and a tail heating surface arranged in the membrane type water-cooled wall body. According to the circulating fluidized bed boiler structure provided by the embodiment of the utility model, the membrane type water-cooled wall bodies are arranged around the vertical shafts of the tail heating surfaces, the periphery of the membrane type water-cooled wall bodies is tightly sealed, the tail heating surfaces are contained in the membrane type water-cooled wall bodies, the tightness can be improved, the membrane type water-cooled wall manufacturing mechanization degree is high, the installation is simple and convenient, the manufacturing cost is low, the heating area is increased, and the tail smoke discharging temperature is reduced.

When the circulating fluidized bed boiler is used, although the heating area is increased, the combustion length of fuel is shorter, so that the fuel is not fully combusted, and a large amount of harmful gas is easily generated.

Disclosure of Invention

The utility model aims to solve the problem of insufficient fuel combustion in the prior art and overcome the defects in the prior art, and designs a turbine blade mounting manipulator capable of stably grabbing different curvatures.

In order to achieve the above object, the technical scheme of the present utility model is as follows:

the circulating fluidized bed boiler comprises a bracket and a fluidized bed boiler mechanism arranged on the outer wall of the bracket, wherein the fluidized bed boiler mechanism comprises a boiler component, a fluidized bed component and a circulating component;

the boiler assembly comprises a boiler body, a burner, a screen plate and a feed inlet, wherein the outer wall of the bracket is fixedly connected with the boiler body, the burner is arranged on the inner wall of the boiler body, the screen plate is fixedly connected with the inner wall of the boiler body above the burner, and the feed inlet is formed in the side wall of the boiler body;

the fluidized bed assembly comprises a first-stage fluidized bed, a connecting bent pipe, a second-stage fluidized bed, a third-stage fluidized bed and a connecting pipe, wherein the top end of the furnace body is fixedly connected with the first-stage fluidized bed fixedly connected with the outer wall of the support, the top end of the first-stage fluidized bed is fixedly connected with the connecting bent pipe, one end of the connecting bent pipe is fixedly connected with the second-stage fluidized bed, one side of the second-stage fluidized bed is provided with the third-stage fluidized bed, and the connecting part of the third-stage fluidized bed and the second-stage fluidized bed is provided with the connecting pipe;

the circulating assembly comprises a connecting cylinder, a circulating pipe and a circulating port, wherein the connecting cylinder is connected with the outer wall pipeline of the three-stage fluidized bed, the circulating pipe connected with the pipeline at the bottom end of the connecting pipe is arranged at the bottom end of the connecting cylinder, and the circulating port is formed in the connecting part of the circulating pipe and the furnace body.

Preferably, the lateral wall pipe connection of connecting cylinder has the absorption tower, the outer wall fixedly connected with frame that opens and shuts of absorption tower, the outer wall of frame that opens and shuts articulates soon has the door that opens and shuts, the outer wall that opens and shuts the frame is located one side fixedly connected with positioning frame that opens and shuts the door, positioning frame's inner wall fixedly connected with reset spring, reset spring's one end fixedly connected with is connected with and is supported the piece, the outside fixedly connected with push rod that connects to support the piece extends to positioning frame's lateral wall, the bottom butt of connecting to support the piece has flexible piece that supports, the outer wall that stretches out and draws back the piece extends to positioning frame's outside block that has with the door outer wall fixedly connected with that opens and shuts, the inner wall interactive connection that opens and shuts the frame has the adsorption net, the discharge outlet has been seted up to the bottom that the absorption tower is located the below that opens and shuts the frame.

Preferably, the primary fluidized bed, the secondary fluidized bed and the tertiary fluidized bed are parallel.

Preferably, the circulation pipe has an inclined shape.

Preferably, the opening and closing frames are provided with five groups, and the five groups of opening and closing frames are distributed along the outer wall of the absorption tower at equal intervals.

Preferably, the cross section of the connecting support block and the cross section of the telescopic support block are both trapezoidal, and the inclined plane of the connecting support block is embedded with the inclined plane box of the telescopic support block.

Preferably, the positioning block forms a clamping structure between the positioning frame and the telescopic supporting block through the connection supporting block.

The utility model has the beneficial effects that:

through position one-level fluidized bed, second grade fluidized bed and tertiary fluidized bed, the gaseous after the fuel burns loops through one-level fluidized bed, second grade fluidized bed and tertiary fluidized bed, greatly increased gaseous incineration length, simultaneously, the impurity in the gas gets into in the circulating pipe through the connecting pipe of second grade fluidized bed bottom, the gas in the tertiary fluidized bed gets into in the connecting cylinder, the impurity in the tertiary fluidized bed gas gets into in the circulating pipe through the connecting cylinder, so that the impurity of circulating pipe falls into the furnace body again and burns, realize the cyclic incineration operation to the fuel, the impurity in the greatly reduced gas.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic diagram showing the connection cross-sectional structures of the primary fluidized bed, the secondary fluidized bed and the tertiary fluidized bed of the present utility model;

FIG. 3 is a schematic cross-sectional view of the absorber of the present utility model;

FIG. 4 is a schematic view of the structure of the open/close frame of the present utility model;

fig. 5 shows a schematic view of the internal structure of the positioning frame of the present utility model.

Reference numerals: 1. a bracket; 2. a furnace body; 3. a burner; 4. a screen plate; 5. a feed inlet; 6. a primary fluidized bed; 7. a connecting bent pipe; 8. a secondary fluidized bed; 9. a third fluidized bed; 10. a connecting pipe; 11. a connecting cylinder; 12. a circulation pipe; 13. a circulation port; 14. an absorption tower; 15. an opening and closing frame; 16. an opening/closing door; 17. a positioning frame; 18. a return spring; 19. connecting the abutting blocks; 20. a push rod; 21. a telescopic supporting block; 22. a positioning block; 23. an adsorption net; 24. and a discharge port.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

Example 1

As shown in fig. 1-2, the circulating fluidized bed boiler provided by the utility model comprises a bracket 1 and a fluidized bed boiler mechanism arranged on the outer wall of the bracket 1, wherein the fluidized bed boiler mechanism comprises a boiler component, a fluidized bed component and a circulating component;

the boiler assembly comprises a boiler body 2, a burner 3, a screen plate 4 and a feed inlet 5, wherein the outer wall of a bracket 1 is fixedly connected with the boiler body 2, the burner 3 is arranged on the inner wall of the boiler body 2, the screen plate 4 is fixedly connected with the inner wall of the boiler body 2 above the burner 3, and the feed inlet 5 is arranged on the side wall of the boiler body 2;

the fluidized bed assembly comprises a first-stage fluidized bed 6, a connecting bent pipe 7, a second-stage fluidized bed 8, a third-stage fluidized bed 9 and a connecting pipe 10, wherein the top end of the furnace body 2 is fixedly connected with the first-stage fluidized bed 6 fixedly connected with the outer wall of the support 1, the top end of the first-stage fluidized bed 6 is fixedly connected with the connecting bent pipe 7, one end of the connecting bent pipe 7 is fixedly connected with the second-stage fluidized bed 8, one side of the second-stage fluidized bed 8 is provided with the third-stage fluidized bed 9, and the connecting part of the third-stage fluidized bed 9 and the second-stage fluidized bed 8 is provided with the connecting pipe 10;

the circulating assembly comprises a connecting cylinder 11, a circulating pipe 12 and a circulating port 13, wherein the connecting cylinder 11 is connected with the outer wall pipeline of the three-stage fluidized bed 9, the circulating pipe 12 connected with the bottom end pipeline of the connecting pipe 10 is arranged at the bottom end of the connecting cylinder 11, and the circulating port 13 is formed in the connecting part of the circulating pipe 12 and the furnace body 2.

In this embodiment, the primary fluidized bed 6, the secondary fluidized bed 8 and the tertiary fluidized bed 9 are parallel, and by setting the primary fluidized bed 6, the secondary fluidized bed 8 and the tertiary fluidized bed 9, the control operation of fully burning the gas is facilitated, and the gas burning length is greatly increased.

In this embodiment, the shape of the circulating pipe 12 is inclined, and by arranging the inclined circulating pipe 12, impurities in gas can enter the circulating pipe 12 through the connecting pipe 10 at the bottom end of the secondary fluidized bed 8, gas in the tertiary fluidized bed 9 enters the connecting cylinder 11, and impurities in gas in the tertiary fluidized bed 9 enter the circulating pipe 12 through the connecting cylinder 11, so that the impurities in the circulating pipe 12 fall into the furnace body 2 again for incineration, thereby realizing the cyclic incineration operation of fuel and greatly reducing the impurities in the gas.

Example 2

As shown in fig. 3-4, in the circulating fluidized bed boiler provided by the utility model, compared with the embodiment 1, the side wall pipeline of the connecting cylinder 11 is connected with the absorption tower 14, the outer wall of the absorption tower 14 is fixedly connected with the opening and closing frame 15, the outer wall of the opening and closing frame 15 is rotatably connected with the opening and closing door 16, one side of the outer wall of the opening and closing frame 15 positioned on the opening and closing door 16 is fixedly connected with the positioning frame 17, the inner wall of the positioning frame 17 is fixedly connected with the reset spring 18, one end of the reset spring 18 is fixedly connected with the connecting supporting block 19, the outer part of the side wall extending to the positioning frame 17 is fixedly connected with the push rod 20, the bottom end of the connecting supporting block 19 is abutted with the telescopic supporting block 21, the outer wall of the telescopic supporting block 21 is extended to the outer part of the positioning frame 17 and is clamped with the positioning block 22 fixedly connected with the outer wall of the opening and closing door 16, the inner wall of the opening and closing frame 15 is interactively connected with the adsorption net 23, the bottom end of the absorption tower 14 is provided with a discharge port 24 below the opening and closing frame 15, by the arrangement, the gas of the connecting cylinder 11 is facilitated to enter the absorption tower 14 through a pipeline, the gas is fully filtered through five groups of adsorption nets 23, harmful gas in the gas is adsorbed, then purified gas is discharged through the discharge port 24, the adsorption and discharge operations of the harmful gas in the gas are realized, after the adsorption nets 23 are adsorbed for a long time, a worker needs to replace the adsorption nets 23, the worker pushes the push rod 20 against the elasticity of the reset spring 18, the push rod 20 moves to drive the connecting abutting block 19 to slide along the inner wall of the positioning frame 17, the connecting abutting block 19 slides through a connecting inclined plane connecting the abutting block 19 and the telescopic abutting block 21 to drive the telescopic abutting block 21 to move relative to the positioning block 22 on the outer wall of the opening and closing door 16, and then the worker takes out the old adsorption nets 23, then a new adsorption net 23 is put in to realize the replacement operation of the adsorption net 23, so that the reduction of adsorption efficiency after the long-time use of the adsorption net 23 is avoided, and more harmful gases in the exhaust gas are caused.

In this embodiment, the open-close frames 15 are provided with five groups, the position relationship of the five groups of open-close frames 15 is that the open-close frames 15 are equidistantly distributed along the outer wall of the absorption tower 14, and by arranging the five groups of open-close frames 15, five groups of adsorption nets 23 are arranged inside the five groups of open-close frames 15, so that the gas can be fully filtered through the five groups of adsorption nets 23, the harmful gas in the gas can be adsorbed, and then the purified gas can be discharged through the discharge port 24, so that the harmful gas adsorption and discharge operation in the gas can be realized.

In this embodiment, the cross section of the connection support block 19 and the cross section of the telescopic support block 21 are both trapezoidal, and the inclined plane of the connection support block 19 is embedded with the inclined plane box of the telescopic support block 21, so that the push rod 20 is facilitated to move to drive the connection support block 19 to slide along the inner wall of the positioning frame 17, and the connection support block 19 slides to drive the telescopic support block 21 to slide through the connection inclined plane of the connection support block 19 and the telescopic support block 21.

In this embodiment, the positioning block 22 forms a clamping structure between the supporting block 19 and the telescopic supporting block 21 and the positioning frame 17, which is favorable for the relative movement of the telescopic supporting block 21 and the positioning block 22 on the outer wall of the opening and closing door 16, so that a worker takes out the old adsorption net 23 and puts the new adsorption net 23 into the old adsorption net 23, thereby realizing the replacement operation of the adsorption net 23, and avoiding the reduction of the adsorption efficiency after the adsorption net 23 is used for a long time, thereby leading to more harmful gases in the exhaust gas.

Working principle: firstly, a worker pours fuel from a feed inlet 5 onto a screen plate 4 in a furnace body 2, then a combustor 3 works to burn the fuel, gas after fuel burning sequentially passes through a primary fluidized bed 6, a secondary fluidized bed 8 and a tertiary fluidized bed 9, meanwhile, impurities in the gas enter a circulating pipe 12 through a connecting pipe 10 at the bottom end of the secondary fluidized bed 8, gas in the tertiary fluidized bed 9 enters a connecting cylinder 11, impurities in the gas of the tertiary fluidized bed 9 enter the circulating pipe 12 through the connecting cylinder 11, so that the impurities in the circulating pipe 12 fall into the furnace body 2 again to burn, the cyclic burning operation of the fuel is realized, and the impurities in the gas are greatly reduced.

Then, the gas of the connecting cylinder 11 enters the absorption tower 14 through a pipeline, the gas is fully filtered through five groups of adsorption nets 23, harmful gas in the gas is adsorbed, and then the purified gas is discharged through the discharge port 24, so that the adsorption and discharge operation of the harmful gas in the gas are realized.

Finally, after the adsorption net 23 is adsorbed for a long time, the adsorption net 23 needs to be replaced, a worker overcomes the elasticity of the reset spring 18 to push the push rod 20, the push rod 20 moves to drive the connecting supporting block 19 to slide along the inner wall of the positioning frame 17, the connecting supporting block 19 slides to drive the telescopic supporting block 21 to move relative to the positioning block 22 on the outer wall of the opening and closing door 16 through the connecting inclined plane of the connecting supporting block 19 and the telescopic supporting block 21, and then the worker takes out the old adsorption net 23 and then puts the old adsorption net 23 into the new adsorption net 23, so that the replacement operation of the adsorption net 23 is realized, the adsorption efficiency is prevented from being reduced after the adsorption net 23 is used for a long time, and more harmful gases in exhaust gas are caused.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. The utility model provides a circulating fluidized bed boiler, includes support (1) and sets up the fluidized bed boiler mechanism at support (1) outer wall, its characterized in that: the fluidized bed boiler mechanism comprises a boiler assembly, a fluidized bed assembly and a circulating assembly;

the boiler assembly comprises a boiler body (2), a burner (3), a screen plate (4) and a feed inlet (5), wherein the outer wall of the bracket (1) is fixedly connected with the boiler body (2), the burner (3) is arranged on the inner wall of the boiler body (2), the screen plate (4) is fixedly connected with the upper side of the burner (3) on the inner wall of the boiler body (2), and the feed inlet (5) is formed in the side wall of the boiler body (2);

the fluidized bed assembly comprises a primary fluidized bed (6), a connecting bent pipe (7), a secondary fluidized bed (8), a tertiary fluidized bed (9) and a connecting pipe (10), wherein the primary fluidized bed (6) fixedly connected with the outer wall of the support (1) is fixedly connected to the top end of the furnace body (2), the connecting bent pipe (7) is fixedly connected to the top end of the primary fluidized bed (6), the secondary fluidized bed (8) is fixedly connected to one end of the connecting bent pipe (7), the tertiary fluidized bed (9) is arranged on one side of the secondary fluidized bed (8), and the connecting pipe (10) is arranged at the connecting part of the tertiary fluidized bed (9) and the secondary fluidized bed (8);

the circulating assembly comprises a connecting cylinder (11), a circulating pipe (12) and a circulating port (13), wherein the connecting cylinder (11) is connected with an outer wall pipeline of the three-stage fluidized bed (9), the circulating pipe (12) connected with a bottom end pipeline of the connecting pipe (10) is installed at the bottom end of the connecting cylinder (11), and the circulating port (13) is formed in the connecting part of the circulating pipe (12) and the furnace body (2).

2. A circulating fluidized bed boiler according to claim 1, characterized in that: the utility model discloses a side wall pipe connection of connecting cylinder (11) has absorption tower (14), the outer wall fixedly connected with frame (15) that opens and shuts of absorption tower (14), the outer wall of frame (15) that opens and shuts connects soon has opening and shutting door (16), the outer wall of frame (15) that opens and shuts is located one side fixedly connected with positioning frame (17) of opening and shutting door (16), the inner wall fixedly connected with reset spring (18) of positioning frame (17), the one end fixedly connected with of reset spring (18) supports piece (19), the outside fixedly connected with push rod (20) that the lateral wall of connecting support piece (19) extends to positioning frame (17), the bottom butt of connecting support piece (19) has flexible support piece (21), the outside block that the outer wall of flexible support piece (21) extends to positioning frame (17) has locating piece (22) with opening and shutting door (16) outer wall fixedly connected, the inner wall interdynamic connection of frame (15) has adsorption net (23), the bottom of absorption tower (14) is located below frame (15) and opens and shuts and offer drain (24).

3. A circulating fluidized bed boiler according to claim 1, characterized in that: the primary fluidized bed (6), the secondary fluidized bed (8) and the tertiary fluidized bed (9) are parallel.

4. A circulating fluidized bed boiler according to claim 1, characterized in that: the shape of the circulating pipe (12) is inclined.

5. A circulating fluidized bed boiler according to claim 2, characterized in that: the opening and closing frames (15) are provided with five groups, and the five groups of opening and closing frames (15) are distributed along the outer wall of the absorption tower (14) at equal intervals.

6. A circulating fluidized bed boiler according to claim 2, characterized in that: the cross section of the connecting supporting block (19) and the cross section of the telescopic supporting block (21) are trapezoidal, and the inclined plane of the connecting supporting block (19) is embedded with the inclined plane box of the telescopic supporting block (21).

7. A circulating fluidized bed boiler according to claim 2, characterized in that: the positioning block (22) forms a clamping structure between the positioning frame (17) and the telescopic supporting block (21) through the connection supporting block (19).