CN209801471U

CN209801471U - Circulating fluidized bed boiler capable of achieving electrostatic dust removal

Info

Publication number: CN209801471U
Application number: CN201920298463.9U
Authority: CN
Inventors: 朱金水
Original assignee: Hangzhou Jet Thermal Power Co Ltd
Current assignee: Hangzhou Jet Thermal Power Co Ltd
Priority date: 2019-03-08
Filing date: 2019-03-08
Publication date: 2019-12-17
Anticipated expiration: 2029-03-08

Abstract

the utility model discloses a but circulating fluidized bed boiler of electrostatic precipitator relates to circulating fluidized bed technical field, aims at solving circulating fluidized bed boiler at the in-process of burning coal, can produce the coal ash dust, and the coal ash dust produces the technical problem of static with the boiler inside wall easily, and its technical scheme main points are circulating fluidized bed boiler that can electrostatic precipitator, including boiler shell, boiler shell's one end is provided with electrostatic precipitator, the gas blow hole has been seted up to boiler shell's lateral wall, be provided with the gas blow pipe in the gas blow hole, the one end of gas blow pipe links to each other with boiler shell, the other end of gas blow pipe links to each other with electrostatic precipitator, has reached and has cleared up the dust that produces when burning coal inside circulating fluidized bed boiler.

Description

Circulating fluidized bed boiler capable of achieving electrostatic dust removal

Technical Field

The utility model relates to a circulating fluidized bed technical field, more specifically say, it relates to a but circulating fluidized bed boiler of electrostatic precipitator.

background

Circulating fluidized bed boilers are the clean coal combustion technology which is developed rapidly and has the highest industrialization degree in recent years.

The prior Chinese patent with the application number of 201721006967.6 provides a slag discharging device of a circulating fluidized bed boiler, which comprises a boiler and a slag falling pipe connected with the boiler, wherein the slag falling pipe is arranged in a cylinder shape, the side wall of the slag falling pipe is provided with a rotating groove, a rotating ring is arranged in the rotating groove in a rotating way around the axis of the slag falling pipe, and a plurality of scraping blades abutted against the inner side wall of the slag falling pipe are fixedly arranged on the rotating ring; the inner side wall of the slag falling pipe is provided with a connecting groove for communicating the outer side of the slag falling pipe with the rotating groove, the outer side of the slag falling pipe is also provided with a first motor, the output shaft of the first motor is fixedly provided with a gear, and the outer side of the rotating part is provided with a tooth groove matched with the gear; the circulating fluidized bed boiler operates by burning coal, and the coal cinder with heavy weight can fall into a cinder dropping pipe.

However, in the circulating fluidized bed boiler, coal ash and dust are generated during the process of burning coal, and the coal ash and dust are easy to generate static electricity with the inner side wall of the boiler, so that the static electricity is attached to components in the boiler, and improvement is needed.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a but circulating fluidized bed boiler of electrostatic precipitator, its coal ash dust that produces when having the inside burning coal of circulating fluidized bed boiler carries out static neutralization to reach the advantage to coal ash dust clearance.

In order to achieve the above purpose, the utility model provides a following technical scheme:

The utility model provides a but circulating fluidized bed boiler of electrostatic precipitator, includes boiler shell, boiler shell's one end is provided with the supporter, be provided with electrostatic precipitator on the supporter, boiler shell has seted up the hole of blowing near the lateral wall of supporter direction, be provided with the gas blow pipe in the hole of blowing, the one end of gas blow pipe links to each other with boiler shell, the other end of gas blow pipe links to each other with electrostatic precipitator.

Through adopting above-mentioned technical scheme, circulating fluidized bed boiler is at the in-process of burning coal, can produce the coal ash dust, the heavier coal ash dust of quality drops in the coal breakage intraductally, the coal ash dust that the quality is lighter produces static with the boiler inside wall easily to on the part in the boiler of adhering to, set up electrostatic precipitator and blow in the air current that has electric charge in to the boiler, carry out the neutralization to the air in the boiler, the dust separates with the boiler inside wall, it falls in the sediment intraductal to drop in the great dust of quality to adhere to.

Furthermore, one end of the air blowing pipe close to the boiler shell is provided with a first extension plate, the first extension plate is provided with a fastening hole, a fastening bolt is inserted into the fastening hole, and a fixing hole for inserting the fastening bolt is formed in the side wall of the boiler shell.

Through adopting above-mentioned technical scheme, set up first extension board in the one end that the gas blow pipe is close to boiler shell, set up the fastening hole on the first extension board, insert in the fastening hole and establish fastening bolt, boiler shell's lateral wall is seted up and is supplied fastening bolt to insert the fixed orifices of establishing, and the electrostatic precipitator of being convenient for and the gas blow pipe are installed on circulating fluidized bed boiler.

Further, a high-temperature gasket is arranged between the first extension plate and the fastening bolt.

Through adopting above-mentioned technical scheme, for further fastening gas blow pipe and circulating fluidized bed boiler, be provided with the high temperature gasket between extension board and bolt, the high temperature gasket makes extension board and bolt interference fit.

Further, a supporting frame is arranged on the side wall of one side, away from the electrostatic dust collector, of the boiler shell, an air exhaust hole is formed in the side wall, close to the supporting frame, of the boiler shell, a negative pressure air fan is arranged on the supporting frame, and the negative pressure air fan is connected with a pipeline of the boiler shell.

Through adopting above-mentioned technical scheme, after the dust in the boiler is neutralized by static, the dust breaks away from with the boiler inside wall, and some coal ashes are attached to the cinder that the quality is big, drop in the cinder pipe together with the cinder, and remaining part coal ash dust floats in the air, sets up negative-pressure air fan, collects the coal ash dust that floats in the air.

Further, an exhaust pipe is arranged on one side, away from the direction of the boiler shell, of the negative pressure fan, a dust collection box is arranged at the terminal of the exhaust pipe, a collection hole communicated with the exhaust pipe is formed in the side wall, close to the direction of the boiler shell, of the dust collection box, the dust collection box is placed on the support frame, an exhaust port is formed in the side wall, away from the direction of the exhaust pipe, of the dust collection box, and a filter screen is arranged at the exhaust port.

By adopting the technical scheme, after the negative pressure fan pumps out dust in the circulating fluidized bed boiler, the air flow with the dust is directly discharged in the air to cause environmental pollution, so that a dust collection box is arranged to be connected with a negative pressure fan pipeline, the air flow with the dust enters the dust collection box, the air is discharged from a filter screen, and the dust is left in the dust collection box.

Further, a dust exhaust valve is arranged at the bottom of the dust collection box.

Through adopting above-mentioned technical scheme, when the too much coal ash dust that piles up in the dust collection box needs to clear up, open the valve, handle the dust in the dust collection box.

Furthermore, a second extension plate is arranged at one end of the exhaust pipe close to the direction of the dust collection box, a dismounting hole is formed in the second extension plate, a dismounting bolt is arranged in the dismounting hole, and a limiting hole for the insertion of the dismounting bolt is formed in the dust collection box.

Through adopting above-mentioned technical scheme, after using the dust collection box for a long time, take place to block up for avoiding blast pipe and dust collection box junction, so make blast pipe and dust collection box be the screw connection, conveniently dismantle the clearance.

Further, the filter screen and the dust collection box are detachably connected.

Through adopting above-mentioned technical scheme, the filter screen of dust collection box department filters the dust for a long time, and the dust is collected easily on the wire netting, needs periodic treatment, so set up to dismantle the connection, makes things convenient for operating personnel to carry out whole clearance to the filter screen.

to sum up, the utility model discloses following beneficial effect has:

1. Utilizing an electrostatic dust collector to perform charge neutralization on the coal ash and dust adsorbed on the inner side wall of the circulating fluidized bed boiler so as to separate the coal ash and dust from the circulating fluidized bed boiler;

2. Collecting the dust floating in the circulating fluidized bed boiler by using an air exhaust fan;

3. The dust collection box is used for filtering the air flow with dust pumped by the air exhaust fan and collecting the dust, thereby preventing environmental pollution.

Drawings

FIG. 1 is a schematic view of the overall structure of an electrostatic dust collector of a circulating fluidized bed boiler in the embodiment;

FIG. 2 is a schematic view of the overall structure of the negative pressure fan in the embodiment;

FIG. 3 is a schematic view showing a connection mode of a blowpipe and a boiler shell in the embodiment;

FIG. 4 is a schematic view showing a connection manner of the exhaust pipe and the dust box in the embodiment.

in the figure: 1. a boiler housing; 11. a rack; 12. a gas blowing hole; 13. an air blowing pipe; 14. a first extension plate; 141. a fastening hole; 142. fastening a bolt; 143. a high temperature gasket; 15. a fixing hole; 16. an air exhaust hole; 17. a support frame; 2. an electrostatic precipitator; 3. a negative pressure fan; 31. an exhaust pipe; 311. a second extension plate; 312. disassembling the hole; 313. disassembling the bolt; 32. a dust collection box; 321. a dust exhaust valve; 322. a limiting hole; 33. an exhaust port; 34. filtering with a screen; 35; and (4) collecting holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

A circulating fluidized bed boiler capable of achieving electrostatic dust removal refers to FIG. 1 and comprises a boiler shell 1, wherein a storage rack 11 is welded at one end of the boiler shell 1, an electrostatic dust remover 2 is placed on the storage rack 11, a blow hole 12 is formed in the side wall, close to the storage rack 11, of the boiler shell 1, a blow pipe 13 is detachably connected to the side wall, close to the storage rack 11, of the boiler shell 1, the blow pipe 13 is made of stainless steel materials, the blow pipe 13 is communicated with the blow hole 12, and one end, far away from the boiler shell 1, of the blow pipe 13 is fixedly connected with the electrostatic dust remover 2; airflow with positive charges or negative charges is blown into the circulating fluidized bed boiler through the electrostatic dust collector 2, and the blown airflow is neutralized with the charges on the inner side wall of the boiler shell 1, so that the coal ash dust is separated from the boiler shell 1.

Referring to fig. 2 and 4, a support frame 17 is welded on the side wall of the boiler shell 1 far away from the electrostatic dust collector 2, an air suction hole 16 is formed in the side wall of the boiler shell 1 near the support frame 17, a negative pressure fan 3 is placed on the support frame 17, and the negative pressure fan 3 is connected with the boiler shell 1 through a pipeline; an exhaust pipe 31 is fixedly connected to one side of the negative pressure fan 3 far away from the direction of the boiler shell 1, a dust collection box 32 is detachably connected to the terminal of the exhaust pipe 31, a collection hole 35 communicated with the exhaust pipe 31 is formed in the side wall, close to the direction of the boiler shell 1, of the dust collection box 32, the dust collection box 32 is placed on the support frame 17, an exhaust port 33 is formed in the side wall, far away from the direction of the exhaust pipe 31, of the dust collection box 32, and a filter screen 34 is detachably connected to the position; the coal ash and dust floating in the circulating fluidized bed boiler are pumped out by the negative pressure fan 3, and the airflow with the dust is filtered and collected by the dust collection box 32.

referring to fig. 3, one end of the gas blow pipe 13 close to the boiler shell 1 is fixedly connected with a first extension plate 14, the first extension plate 14 is provided with a plurality of fastening holes 141, fastening bolts 142 are connected with the fastening holes 141 in an internal thread manner, the side wall of the boiler shell 1 is provided with fixing holes 15 for the fastening bolts 142 to be inserted, a high-temperature gasket 143 is arranged between the first extension plate 14 and the fastening bolts 142, and sealing material used by high-temperature equipment is used, the high-temperature gasket 143 comprises a high-temperature coating pad and a ceramic fiber liner, and the ceramic fiber liner is sleeved with the high-temperature coating pad; the boiler shell 1 is in threaded connection with the gas blowing pipe 13, so that the gas blowing pipe 13 is conveniently arranged on the circulating fluidized bed boiler.

Referring to fig. 3 and 4, a dust exhaust valve 321 is fixedly arranged at the bottom of the dust box 32, and the dust exhaust valve 321 is used for periodically treating the coal ash and dust in the dust box 32; a second extension plate 311 is arranged at one end of the exhaust pipe 31 close to the dust box 32, a plurality of disassembly holes 312 are formed in the second extension plate 311, disassembly bolts 313 are connected in the disassembly holes 312 in a threaded manner, and limit holes 322 for the disassembly bolts 313 to be inserted are formed in the dust box 32; the operation personnel can conveniently detach the dust box, and the joint of the dust box 32 and the exhaust pipe 31 can be cleaned in all directions, so that blockage is avoided.

The working principle is as follows:

When the circulating fluidized bed boiler starts to operate, the electrostatic dust collector 2 is opened, airflow with charges is blown into the circulating fluidized bed boiler by the electrostatic dust collector 2, and the blown airflow is neutralized with the charges on the inner side wall of the boiler shell 1, so that the coal ash and the dust are separated from the boiler shell 1; the coal ash and dust floating in the boiler case 1 are drawn out by the negative pressure fan 3 and reach the dust box 32 through the exhaust duct 31, and after the airflow with dust reaches the dust box 32, the air is exhausted through the exhaust port 33, and the dust is filtered by the filter 34 and remains in the dust box 32.

When an operator cleans the dust in the dust box 32 regularly, the dust valve 321 is opened to collect the dust, and when the dust is accumulated at the joint of the dust box 32 and the exhaust pipe 31 too much, the disassembly bolt 313 is unscrewed to separate the exhaust pipe 31 from the dust box 32 so as to avoid the blockage of the exhaust pipe 31, and the operator cleans the dust box in all aspects.

the present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. a circulating fluidized bed boiler with electrostatic precipitator, comprising a boiler housing (1), characterized in that: the boiler comprises a boiler shell (1) and is characterized in that a storage rack (11) is arranged at one end of the boiler shell (1), an electrostatic dust collector (2) is arranged on the storage rack (11), an air blowing hole (12) is formed in the side wall, close to the storage rack (11), of the boiler shell (1), an air blowing pipe (13) is arranged in the air blowing hole (12), one end of the air blowing pipe (13) is connected with the boiler shell (1), and the other end of the air blowing pipe (13) is connected with the electrostatic dust collector (2).

2. The circulating fluidized bed boiler capable of electrostatic dust removal according to claim 1, wherein: one end of the air blow pipe (13) close to the boiler shell (1) is provided with a first extension plate (14), a fastening hole (141) is formed in the first extension plate (14), a fastening bolt (142) is inserted into the fastening hole (141), and a fixing hole (15) for the fastening bolt (142) to be inserted is formed in the side wall of the boiler shell (1).

3. an electrostatically precipitable circulating fluidized bed boiler according to claim 2, characterized in that: a high-temperature gasket (143) is arranged between the first extension plate (14) and the fastening bolt (142).

4. The circulating fluidized bed boiler capable of electrostatic dust removal according to claim 1, wherein: the boiler shell is characterized in that a supporting frame (17) is arranged on the side wall, away from the electrostatic dust collector (2), of one side of the boiler shell (1), an air suction hole (16) is formed in the side wall, close to the supporting frame (17), of the boiler shell (1), a negative pressure fan (3) is arranged on the supporting frame (17), and the negative pressure fan (3) is connected with the boiler shell (1) through a pipeline.

5. the circulating fluidized bed boiler capable of electrostatic dust removal according to claim 4, wherein: one side that boiler casing (1) direction was kept away from in negative pressure air fan (3) is provided with blast pipe (31), the terminal of blast pipe (31) is provided with dust collection box (32), dust collection box (32) are close to the lateral wall of boiler casing (1) direction and offered and blast pipe (31) communicating collection hole (35), dust collection box (32) are placed on support frame (17), the lateral wall that blast pipe (31) direction was kept away from in dust collection box (32) is provided with gas vent (33), gas vent (33) department is provided with filter screen (34).

6. An electrostatically precipitable circulating fluidized bed boiler according to claim 5, characterized in that: the bottom of the dust collection box (32) is provided with a dust exhaust valve (321).

7. An electrostatically precipitable circulating fluidized bed boiler according to claim 5, characterized in that: one end of the exhaust pipe (31) close to the dust collection box (32) is provided with a second extension plate (311), the second extension plate (311) is provided with a dismounting hole (312), a dismounting bolt (313) is arranged in the dismounting hole (312), and the dust collection box (32) is provided with a limiting hole (322) for the insertion of the dismounting bolt (313).

8. An electrostatically precipitable circulating fluidized bed boiler according to claim 5, characterized in that: the filter screen (34) and the dust box (32) are detachably connected.