CN217178499U

CN217178499U - Boiler fly ash recycling treatment system

Info

Publication number: CN217178499U
Application number: CN202220029913.6U
Authority: CN
Inventors: 杨鹏; 缪洪用; 张雷; 雷碧怀; 尹杨; 陈翠勇
Original assignee: Shizong Coking Chemical Co ltd
Current assignee: Shizong Coking Chemical Co ltd
Priority date: 2022-01-07
Filing date: 2022-01-07
Publication date: 2022-08-12
Anticipated expiration: 2032-01-07

Abstract

The utility model provides a boiler flying dust recycling system, including the boiler, the cyclone that links to each other with boiler flue gas outlet, the sack cleaner that links to each other with cyclone outlet flue, the chimney that links to each other with the sack cleaner exhaust port, the ash bin that links to each other with sack cleaner row ash mouth through first conveyer pipe, its characterized in that is equipped with first control valve on first conveyer pipe, this first control valve the place ahead is equipped with the branch pipe, be equipped with the second control valve on the branch pipe, the branch pipe links to each other with reserve ash bin, reserve ash bin passes through the second conveyer pipe and links to each other with the boiler feed inlet. After primary and secondary ash removal of high-temperature flue gas exhausted by a boiler is completed by a cyclone dust collector and a bag-type dust collector, clean flue gas is exhausted by a chimney, and primary and secondary flue dust returns to the boiler to participate in combustion, so that the flue dust is circularly treated, the concentration of nitrogen oxides is reduced, the pollution of harmful ingredients in the flue gas to the environment is reduced, and meanwhile, residual fuel in the flue gas is utilized, and energy is saved.

Description

Boiler fly ash recycling treatment system

Technical Field

The utility model relates to a fluidized bed boiler flying dust recycling processing system belongs to boiler design technical field.

Background

The circulating fluidized bed boiler is widely used due to the advantages of wide fuel adaptability, clean combustion and the like. After the coal is combusted in the circulating fluidized bed boiler and the limestone desulfurizer is desulfurized in the circulating fluidized bed boiler, the generated high-temperature flue gas carries a large amount of particles and fly ash, after gas-solid separation is carried out by a dust remover, clean gas is discharged into the atmosphere, and the collected boiler ash enters an ash bin and is sold for comprehensive utilization. Because the coal used by the boiler is different and has large variation, the bed temperature is easy to be higher and difficult to control, the concentration of nitrogen oxide is higher, and no denitration means is needed, the fly ash needs to be recycled.

Disclosure of Invention

For solving the deficiencies existing in the prior art, the utility model provides a boiler flying dust recycling treatment system.

The utility model discloses a following technical scheme accomplishes: a boiler fly ash recycling treatment system comprises a boiler, a cyclone dust collector connected with a boiler flue gas outlet, a bag-type dust collector connected with a flue gas outlet of the cyclone dust collector, a chimney connected with a smoke outlet of the bag-type dust collector, and an ash bin connected with an ash discharge port of the bag-type dust collector through a first conveying pipe, and is characterized in that a first control valve is arranged on the first conveying pipe, a branch pipe is arranged in front of the first control valve, a second control valve is arranged on the branch pipe, the branch pipe is connected with a spare ash bin, the spare ash bin is connected with a boiler feed inlet through a second conveying pipe, so that high-temperature flue gas discharged by the boiler firstly removes large-particle ash through the cyclone dust collector, then enters a secondary bag-type dust collector to remove small-particle ash, clean flue gas is emptied through the chimney, small-particle ash discharged by the ash discharge port of the bag-type dust collector is sent into the spare ash bin through the branch pipe, and then returns to the boiler through the second conveying pipe to participate in combustion, therefore, the fly ash subjected to secondary dust removal is recycled as much as possible, and the pollution of the flue gas to the environment is reduced.

The ash discharge port of the cyclone dust collector is directly connected with the feed port of the boiler through a connecting pipe, so that large-particle ash discharged by the cyclone dust collector returns to the boiler to participate in combustion, the fly ash subjected to primary dust removal is recycled as far as possible, and the pollution of flue gas to the environment is reduced.

One or a plurality of standby ash bins are arranged in parallel so as to recycle the fly ash subjected to secondary dust removal as much as possible and reduce the pollution of the flue gas to the environment.

The utility model has the advantages of it is following and effect: by adopting the scheme, large-particle soot can be firstly removed from high-temperature flue gas discharged by a boiler through a cyclone dust collector, then the high-temperature flue gas enters a secondary bag-type dust collector to remove small-particle soot, clean flue gas is exhausted through a chimney, the small-particle soot discharged from an ash discharge port of the bag-type dust collector is sent into a standby ash bin through a branch pipe, the small-particle soot returns to the boiler through a second conveying pipe to participate in combustion, and meanwhile, the large-particle soot discharged by the cyclone dust collector returns to the boiler to participate in combustion, so that the fly ash subjected to primary and secondary dust removal is recycled as much as possible, the concentration of nitrogen oxides is reduced, the pollution of harmful components in the flue gas to the environment is reduced, meanwhile, residual fuel in the flue gas is utilized, and energy is saved.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

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

The utility model provides a boiler flying dust recycling processing system, including boiler 1, cyclone 2 that links to each other with 1 flue gas export of boiler, through the sack cleaner 4 that tobacco pipe 3 and cyclone 2 outlet flue link to each other, chimney 5 that links to each other with the 4 discharge ports of sack cleaner, the ash bin 6 that links to each other through first conveyer pipe 7 and the 4 row ash ports of sack cleaner, wherein: a first control valve 8 is arranged on the first conveying pipe 7, a branch pipe 10 is arranged in front of the first control valve 8, a second control valve 9 is arranged on the branch pipe 10, the branch pipe 10 is connected with a standby ash bin 11, and the standby ash bin 11 is connected with a feed inlet of the boiler through a second conveying pipe 12;

the ash discharge port of the cyclone dust collector 2 is directly connected with the feed port of the boiler 1 through a connecting pipe, so that large-particle ash discharged by the cyclone dust collector 2 returns to the boiler 1 to participate in combustion, the fly ash subjected to primary dust removal is recycled as far as possible, and the pollution of flue gas to the environment is reduced;

one spare ash bin 11 is arranged, obviously, a plurality of spare ash bins can be arranged in parallel, so that the fly ash subjected to secondary dust removal can be recycled as far as possible, and the pollution of the smoke to the environment is reduced.

When the boiler works, high-temperature flue gas discharged by a boiler 1 firstly passes through a cyclone dust collector 2 to remove large-particle soot once, then enters a bag-type dust collector 4 to remove small-particle soot twice, clean flue gas is exhausted through a chimney 5, a first control valve 8 is closed, and a second control valve 9 is opened, so that the small-particle soot discharged by an ash discharge port of the bag-type dust collector 4 is sent into a standby ash bin 11 through a branch pipe 10, and then returns to the boiler 1 through a second conveying pipe 12 to participate in combustion, and meanwhile, the large-particle soot discharged by the cyclone dust collector 2 returns to the boiler 1 to participate in combustion, so that fly ash subjected to primary and secondary dust removal is recycled as much as possible, the concentration of nitrogen oxides is reduced, the pollution of harmful components in the flue gas to the environment is reduced, meanwhile, residual fuel in the flue gas is utilized, and energy is saved.

Claims

1. The utility model provides a boiler flying dust recycling processing system, including the boiler, the cyclone that links to each other with boiler flue gas outlet, the sack cleaner that links to each other with cyclone inlet smoke, the chimney that links to each other with the sack cleaner exhaust port, arrange the ash storehouse that the ash mouthful links to each other through first conveyer pipe and sack cleaner, its characterized in that is equipped with first control valve on first conveyer pipe, this first control valve the place ahead is equipped with the branch pipe, be equipped with the second control valve on the branch pipe, the branch pipe links to each other with reserve ash storehouse, reserve ash storehouse passes through the second conveyer pipe and links to each other with the boiler feed inlet.

2. The boiler fly ash recycling system of claim 1, wherein the cyclone ash discharge port is directly connected to the boiler feed port through a connecting pipe.

3. The boiler fly ash recycling system of claim 1, wherein the spare ash bins are provided in one or in a plurality in parallel.