CN215175177U

CN215175177U - Boiler fly ash reburning device

Info

Publication number: CN215175177U
Application number: CN202120233998.5U
Authority: CN
Inventors: 周锦德; 何进东; 姜政; 严清平
Original assignee: Jiangxi Jinghao Salt Chemical Co ltd
Current assignee: Jiangxi Jinghao Salt Chemical Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-12-14
Anticipated expiration: 2031-01-27

Abstract

The utility model relates to a boiler technical field especially relates to a boiler flying dust reburning device. A boiler fly ash reburning device comprises a boiler and an electrostatic dust collector, wherein a conveying pipe is arranged on one side of the boiler, and an ash outlet of an ash bucket of the electrostatic dust collector is communicated with the conveying pipe through a communicating pipe. The electrostatic precipitator blows out dustless flue gas from the air outlet, gets into the boiler through the conveyer pipe, and the flying dust of ash bucket falls into the conveyer pipe through communicating pipe and is in, and the air current effect of dustless flue gas gets into carries out the furnace of boiler in the boiler and carries out the postcombustion, through implementing, can be so that boiler bed temperature reduces about, reaches the ability that improves the load.

Description

Boiler fly ash reburning device

Technical Field

The utility model relates to a boiler technical field especially relates to a boiler flying dust reburning device.

Background

In the daily power generation process of a power plant, the coal quality of two boilers in a power plant is designed to be 3040 kilocalories, and because of the change of the coal market, the original designed coal quality of the boiler is very difficult to purchase, and the coal used at present is basically about 4500 kilocalories. Because the quality of the used coal deviates a large design value, the temperature of a hearth is about 1000 ℃ when the boiler is in high-load operation, and the risk exists for safe and stable operation.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcoming that prior art exists, the utility model provides a boiler flying dust device that fires again takes the dust remover of power plant to return the flying dust into the furnace and carry out the postcombustion, and boiler bed temperature reduces about 20 degrees, reaches the ability that improves the load.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a boiler flying ash reburning device, which comprises a boiler and an electrostatic dust collector, wherein one side of the boiler is provided with a conveying pipe, a communicating pipe is communicated between an ash hopper outlet of the electrostatic dust collector and the conveying pipe, the ash hopper outlet of the electrostatic dust collector is communicated with the conveying pipe through the communicating pipe, and flying ash in an ash hopper of the electrostatic dust collector falls into the conveying pipe through the communicating pipe;

the air outlet of the electrostatic dust collector is communicated with the communicating pipe, and the connecting position of the communicating pipe and the conveying pipe is arranged between the connecting position of the boiler and the conveying pipe and the connecting position of the air outlet of the electrostatic dust collector and the communicating pipe.

As a further improvement of the above technical solution, the channel in the communication pipe is inclined to the flow direction of the fly ash in the conveying pipe and is communicated with the channel of the conveying pipe.

As a further improvement of the technical scheme, the air outlet of the electrostatic dust collector is communicated with the conveying pipe sequentially through an air outlet pipe and a connecting pipe, and the air outlet pipe and the connecting pipe are respectively provided with a first stop valve and a second stop valve.

As a further improvement of the technical scheme, one end of the conveying pipe, which is far away from the boiler, is provided with a fan, and a third stop valve is arranged on the conveying pipe between the fan and the connecting position of the connecting pipe and the conveying pipe.

As a further improvement of the technical scheme, the number of the communicating pipes is the same as that of the ash hoppers of the electrostatic dust collector.

As a further improvement of the technical scheme, the air outlet pipe, the conveying pipe, the connecting pipe and the communicating pipe are all high-temperature-resistant and corrosion-resistant pipelines.

The utility model has the advantages that: 1. the electrostatic precipitator blows out dustless flue gas from the air outlet, gets into the boiler through the conveyer pipe, and the flying dust of ash bucket falls into the conveyer pipe through communicating pipe and is in, and the air current effect of dustless flue gas gets into carries out the furnace of boiler in the boiler and carries out the postcombustion, through implementing, can be so that boiler bed temperature reduces about, reaches the ability that improves the load.

2. The one end that the boiler was kept away from to the conveyer pipe is provided with the fan, and when the air current velocity of flow in the conveyer pipe was not enough, can start the fan and blow in to the conveyer pipe, the air current velocity of flow in the conveyer pipe with higher speed improves the transport efficiency to the flying dust.

Drawings

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

Wherein the figures include the following reference numerals: 1. the device comprises a boiler, 2, an electrostatic dust collector, 21, an air outlet, 22, an air inlet, 23, an ash bucket, 3, an air outlet pipe, 4, a first stop valve, 5, a conveying pipe, 6, a connecting pipe, 7, a second stop valve, 8, a communicating pipe, 9, a fan, 10 and a third stop valve.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which currently preferred embodiments of the invention are shown. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for completeness and fully convey the scope of the invention to the skilled person.

As shown in fig. 1, a fly ash reburning device of a boiler 1 comprises a boiler 1 and an electrostatic precipitator 2, wherein a conveying pipe 5 is arranged at one side of the boiler 1, a communicating pipe 8 is communicated between an ash outlet of an ash hopper 23 of the electrostatic precipitator 2 and the conveying pipe 5, the ash outlet of the ash hopper 23 of the electrostatic precipitator 2 is communicated with the conveying pipe 5 through the communicating pipe 8, and fly ash in the ash hopper 23 of the electrostatic precipitator 2 falls into the conveying pipe 5 through the communicating pipe 8; an air outlet 21 of the electrostatic dust collector 2 is communicated with a communicating pipe 8, and the connecting position of the communicating pipe 8 and the conveying pipe 5 is between the connecting position of the boiler 1 and the conveying pipe 5 and the connecting position of the air outlet 21 of the electrostatic dust collector 2 and the communicating pipe 8.

The electrostatic dust collector 2 blows dust-free flue gas from the air outlet 21, the dust-free flue gas enters the boiler 1 through the conveying pipe 5, fly ash of the ash hopper 23 falls into the conveying pipe 5 through the communicating pipe 8, the fly ash enters the boiler 1 under the action of airflow of the dust-free flue gas to be subjected to secondary combustion in a hearth of the boiler 1, and the bed temperature of the boiler 1 can be reduced by about 20 degrees through implementation, so that the load improving capacity is achieved.

Furthermore, the flowing direction of the fly ash in the channel oblique conveying pipe 5 in the communicating pipe 8 is communicated with the channel of the conveying pipe 5, the airflow of the dust-free flue gas flows towards the boiler 1 along the conveying pipe 5, so that the pressure in the conveying pipe 5 is smaller than the pressure in the communicating pipe 8, the fly ash in the communicating pipe 8 can enter the conveying pipe 5 more smoothly under the action of the pressure, and meanwhile, the flowing direction of the fly ash in the channel oblique conveying pipe 5 in the communicating pipe 8 can prevent the airflow of the dust-free flue gas in the conveying pipe 5 from being blown into the communicating pipe 8 reversely.

Further, the air outlet 21 of the electrostatic dust collector 2 is communicated with the conveying pipe 5 sequentially through the air outlet pipe 3 and the connecting pipe 6, and the air outlet pipe 3 and the connecting pipe 6 are respectively provided with a first stop valve 4 and a second stop valve 7.

Further, one end of the conveying pipe 5, which is far away from the boiler 1, is provided with a fan 9, the conveying pipe 5 between the connecting positions of the fan 9 and the connecting pipe 6 as well as the conveying pipe 5 is provided with a third stop valve 10, when the airflow velocity in the conveying pipe 5 is insufficient, the fan 9 can be started to blow air in the conveying pipe 5, the airflow velocity in the conveying pipe 5 is accelerated, and the conveying efficiency of fly ash is improved.

Further, the number of the communicating tubes 8 is the same as the number of the ash hoppers 23 of the electrostatic precipitator 2.

Furthermore, the air outlet pipe 3, the delivery pipe 5, the connecting pipe 6 and the communicating pipe 8 are all high-temperature-resistant and corrosion-resistant pipelines, so that high-temperature fly ash can be prevented from softening and corroding.

The above-mentioned embodiments only represent the preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes, modifications and substitutions can be made, which are all within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a boiler flying dust after combustion device, includes boiler and electrostatic precipitator which characterized in that:

a conveying pipe is arranged on one side of the boiler, a communicating pipe is communicated between an ash hopper ash outlet of the electrostatic dust collector and the conveying pipe, the ash hopper ash outlet of the electrostatic dust collector is communicated with the conveying pipe through the communicating pipe, and fly ash in the ash hopper of the electrostatic dust collector falls into the conveying pipe through the communicating pipe;

2. The boiler fly ash reburning device of claim 1, wherein:

and the channel in the communicating pipe is communicated with the channel of the conveying pipe in a way of inclining the flowing direction of the fly ash in the conveying pipe.

3. The boiler fly ash reburning device of claim 1, wherein:

the air outlet of the electrostatic dust collector is communicated with the conveying pipe through an air outlet pipe and a connecting pipe in sequence, and the air outlet pipe and the connecting pipe are provided with a first stop valve and a second stop valve respectively.

4. The boiler fly ash reburning device of claim 3, wherein:

the conveyer pipe is kept away from the one end of boiler is provided with the fan, the fan with the connecting pipe with between the conveyer pipe hookup location be provided with the third stop valve on the conveyer pipe.

5. The boiler fly ash reburning device of claim 1, wherein:

the number of the communicating pipes is the same as that of the ash buckets of the electrostatic dust collector.

6. The boiler fly ash reburning device of claim 3, wherein:

the air outlet pipe, the conveying pipe, the connecting pipe and the communicating pipe are all high-temperature-resistant and corrosion-resistant pipelines.