CN210069887U

CN210069887U - Boiler heating surface coking optimization soot blowing visual monitoring device

Info

Publication number: CN210069887U
Application number: CN201920907098.7U
Authority: CN
Inventors: 王承亮
Original assignee: Huadian International Electric Power Co Ltd Technical Services Branch
Current assignee: Huadian International Electric Power Co Ltd Technical Services Branch
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-02-14
Anticipated expiration: 2029-06-17

Abstract

The utility model discloses a boiler receives hot side coking and optimizes and blow visual monitoring devices of ash, including support and base, its characterized in that: the camera and the monitoring pipe are respectively fixed on the base through the bracket, the camera is positioned at the rear port part of the monitoring pipe, the probe of the camera is inserted into the monitoring pipe cavity from the rear port part of the monitoring pipe, and the front end of the monitoring pipe is hermetically connected with the fire observation hole on the boiler body through the flange plate; the monitoring pipe is provided with a compressed air inclined purging pipe, and the outer end of the compressed air inclined purging pipe is communicated with a header pipe of an outlet of the air compressor through a soft rubber pipe. The utility model discloses owing to add the camera to directly survey the boiler heating surface coking state through the camera, when the coking state reaches the decoking condition, just open the soot blower, can accurately optimize the implementation ash removal of blowing, and simple structure, convenient operation, assurance that can be very accurate soot blowing opportunity and soot blowing frequency.

Description

Boiler heating surface coking optimization soot blowing visual monitoring device

Technical Field

The utility model relates to a boiler receives hot side coking and blows the improvement of ash processing apparatus, and specifically speaking is a visual monitoring devices of soot blowing is optimized to boiler receives hot side coking, is applicable to under the visual condition of boiler receives hot side coking state, and the accurate implementation blows the ash decoking.

Background

During the operation of the coal-fired boiler, due to factors such as coal quality, uneven combustion of a hearth and the like, ash powder is melted and bonded on a heating surface of the boiler, a coke block is formed by deposition, the heat transfer effect is reduced, and serious accidents such as fire extinguishment of the boiler or pipe explosion of the heating surface can be caused, so that coking must be eliminated in time through a soot blowing device during the operation. At present, the conditions of soot deposition and coking on a heating surface in a boiler hearth are mostly judged based on a pollution coefficient calculated by the thermal performance of the heating surface, and the method has the defects of large calculation error and poor stability of variation trend due to complex thermal calculation of the heating surface of the hearth and more empirical data, so that the field application is not ideal, and the soot blowing of the boiler cannot be accurately guided; in addition, the pollution condition of the heating surface is indirectly predicted according to the temperature of the outlet of the hearth, the temperature-reducing water amount and the temperature of the wall of the heating surface pipe, and soot blowing is guided. Especially, the coking condition of the hearth outlet screen type superheater not only influences the heat exchange deterioration of the heating surface, but also can cause overtemperature and large desuperheating water quantity of the pipe wall, and even has the accident hidden trouble of fire extinguishing of the boiler caused by coke dropping.

It can be known through retrieval that there are many reports on the existing boiler soot blower, such as "a soot blower for preventing coking of heating surface of coal-fired boiler" proposed in 23.01.2013 of the young, chinese patent No. cn201320036663.x, which discloses that it comprises a steam main pipe, a steam branch pipe, a soot blowing air source, a soot blower body, a soot blower probe, a chemical pipe and a high pressure pump, wherein the soot blower probe is inserted into the coking surface in a hearth, and a plurality of soot blower probes are arranged, steam is injected through the steam main pipe and the steam branch pipe, and the chemical is injected through the high pressure pump, thereby removing coking. However, this design still results in decoking in a state where coking is not observed, and therefore decoking optimization is affected.

At present, no report is found for accurately implementing a soot blowing and decoking device under the condition that the coking state of a heating surface of a boiler is visible.

Disclosure of Invention

An object of the utility model is to provide a under the visual condition of boiler heating surface coking state, the accurate soot blowing decoking of implementing, simple structure, convenient operation's boiler heating surface coking optimizes soot blowing visual monitoring device moreover.

In order to achieve the above purpose, the utility model adopts the technical scheme that: this visual monitoring devices of soot blowing is optimized in coking of boiler heating surface, including support and base, its characterized in that: the camera and the monitoring pipe are respectively fixed on the base through the bracket, the camera is positioned at the rear port part of the monitoring pipe, the probe of the camera is inserted into the monitoring pipe cavity from the rear port part of the monitoring pipe, and the front end of the monitoring pipe is hermetically connected with the fire observation hole on the boiler body through the flange plate; the monitoring pipe is provided with a compressed air inclined purging pipe, and the outer end of the compressed air inclined purging pipe is communicated with a header pipe of an outlet of the air compressor through a soft rubber pipe.

The compressed air inclined purging pipe is provided with a control valve, and the air injection amount of the compressed air inclined purging pipe is controlled through the control valve.

And a signal wire of the camera is connected with a display screen of the operation monitoring room.

Eight compressed air inclined purging pipes are arranged, the included angle between the axis of each compressed air inclined purging pipe and the axis of each monitoring pipe is 45 degrees, air outlets, connected with the monitoring pipes, of the four compressed air inclined purging pipes are uniformly distributed in a circular ring shape, and the distance between each compressed air inclined purging pipe and a probe of the camera is 100 mm; the other four compressed air inclined blowing pipes are uniformly distributed in a ring shape at air outlets connected with the monitoring pipe, and the distance between the four compressed air inclined blowing pipes and the flange plate is 150 mm; the pipe diameter of the compressed air inclined purging pipe is 10 mm.

The monitoring pipe is made of a high-temperature-resistant steel pipe, the inner diameter of the monitoring pipe is 20-30 mm, and a probe of a camera can be placed into the monitoring pipe.

The monitoring tube is horizontally arranged or declined for 5-10 degrees.

The air compressor is fixed on the base.

The beneficial effects of the utility model reside in that: compared with the prior art, the boiler soot blower has the advantages that the camera is additionally arranged, the coking state of the heating surface of the boiler is directly observed through the camera, the soot blower is started when the coking state reaches the decoking condition, the steam soot blowing can be accurately and optimally carried out, the structure is simple, the operation is convenient, the soot blowing time and the soot blowing frequency can be accurately controlled, and meanwhile, if the coking in the boiler is found to be serious, the corresponding combustion adjustment can be carried out, and the coking degree is reduced.

Drawings

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

Fig. 2 is an enlarged schematic view of the monitoring tube structure of the present invention along a-a in fig. 1.

Fig. 3 is an enlarged schematic view of the monitoring tube axis according to the present invention.

Fig. 4 is a schematic view of an application state of the present invention.

In the figure: 1. a support; 2. a base; 3. a camera; 4. an air compressor; 5. monitoring the pipe; 6. a compressed air inclined purge tube; 7. a flange plate; 8. a soft rubber tube; 9. a control valve; 10. a signal line; 11. a header pipe; 12. a boiler body; 13. a soot blower; 14. a discharge flue; 15. a fire observation hole; 16. a coke block screen type heating surface.

Detailed Description

The present invention is manufactured with reference to fig. 1, 2, and 3. This visual monitoring devices of soot blowing is optimized in coking of boiler heating surface, including support 1 and base 2, its characterized in that: the camera 3 and the monitoring tube 5 are respectively fixed on the base 2 through the bracket 1, the camera 3 is positioned at the rear port part of the monitoring tube 5, the probe of the camera 3 is inserted into the cavity of the monitoring tube 5 from the rear port part of the monitoring tube 5, the front end of the monitoring tube 5 is hermetically connected with the fire observation hole 15 on the boiler body 12 through the flange 7, and the fire observation hole 15 on the boiler body 12 is over against the coke block screen type heating surface 16 in the cavity of the boiler body 12, so the camera 3 can penetrate through the pipeline of the monitoring tube 5 to directly monitor the coking condition of the coke block screen type heating surface 16, and then the boiler soot blower 13 is accurately started to perform soot blowing and decoking according to the coking condition; the monitoring pipe 5 is provided with a compressed air inclined purging pipe 6, the outer end of the compressed air inclined purging pipe 6 is communicated with a header pipe 11 of an outlet of the air compressor 4 through a soft rubber pipe 8, compressed air is input into the monitoring pipe 5 through the compressed air inclined purging pipe 6, heat in a hearth of the boiler body 12 is prevented from being transmitted into the monitoring pipe 5, a heat insulation effect is achieved, meanwhile, dust deposition is prevented from being generated when negative pressure fluctuation fly ash of the hearth enters the monitoring pipe 5, the monitoring pipe 5 is blocked, and a purging and protecting effect is achieved on the camera 3.

The compressed air inclined purging pipe 6 is provided with a control valve 9, and the air injection amount of the compressed air inclined purging pipe 6 is controlled through the control valve 9.

The signal wire 10 of the camera 3 is connected with a display screen of an operation monitoring chamber, the coking condition of a coke block screen type heating surface 16 in a cavity of a boiler body 12 is directly observed on the display screen of the operation monitoring chamber, and when the soot blowing condition is reached, a soot blower 13 can be conveniently and timely adjusted and controlled to achieve optimal soot blowing.

Eight compressed air inclined purging pipes 6 are arranged, the included angle between the axis of each compressed air inclined purging pipe 6 and the axis of the monitoring pipe 5 is 45 degrees, wherein the air outlets of the four compressed air inclined purging pipes 6 connected with the monitoring pipe 5 are uniformly distributed in a circular ring shape, and the distance between the air outlets and the probe of the camera 3 is 100 mm; the other four compressed air inclined blowing pipes 6 are uniformly distributed in a ring shape at the air outlets connected with the monitoring pipe 5, and the distance between the compressed air inclined blowing pipes and the flange 7 is 150 mm; the pipe diameter of the compressed air inclined purging pipe 6 is 10 mm.

The monitoring tube 5 is made of a high-temperature resistant steel tube, the inner diameter is 20-30 mm, and a probe of the camera 3 can be placed into the monitoring tube.

The monitoring pipe 5 is horizontally arranged or declined for 5-10 degrees.

The air compressor 4 is fixed on the base 2.

The method of application of the present invention is explained with reference to fig. 4. Because the observation hole 15 of the boiler body 12 is aligned with the coke-block screen type heating surface 16, the soot blower 13 is opposite to the observation hole 15, and the upper part of the boiler body 12 is connected with the exhaust flue 14, the end part of the monitoring tube 5 is inserted into the observation hole 15 and is sealed and fixed by the flange 7, the monitoring tube 5 is kept horizontal or inclined by 5-10 degrees, the tube cavity of the monitoring tube 5 is aligned with the coke-block screen type heating surface 16, when the boiler normally operates, an operator monitors that the accumulated soot on the coke-block screen type heating surface 16 reaches the soot blowing condition from the camera 3 or a display screen connected with the camera 3, the soot blower 13 can be started, so that the aim of accurately, timely and optimizing soot blowing is fulfilled.

Claims

1. Boiler heating surface coking is optimized and is blown visual monitoring devices of ash, including support (1) and base (2), its characterized in that: the monitoring device comprises a base (2), a camera (3) and a monitoring pipe (5), wherein the camera (3) and the monitoring pipe (5) are respectively fixed on the base (2) through a support (1), the camera (3) is positioned at the rear port part of the monitoring pipe (5), a probe of the camera (3) is inserted into the cavity of the monitoring pipe (5) from the rear port part of the monitoring pipe (5), and the front end of the monitoring pipe (5) is hermetically connected with a fire observation hole (15) in a boiler body (12) through a flange plate (7); the monitoring pipe (5) is provided with a compressed air inclined purging pipe (6), and the outer end of the compressed air inclined purging pipe (6) is communicated with a header pipe (11) at the outlet of the air compressor (4) through a soft rubber pipe (8).

2. The boiler heating surface coking optimization soot blowing visual monitoring device as claimed in claim 1, wherein: the compressed air inclined purging pipe (6) is provided with a control valve (9).

3. The boiler heating surface coking optimization soot-blowing visual monitoring device as claimed in claim 1 or 2, wherein: eight compressed air inclined purging pipes (6) are arranged, the included angle between the axis of each compressed air inclined purging pipe (6) and the axis of the monitoring pipe (5) is 45 degrees, air outlets of the four compressed air inclined purging pipes (6) connected with the monitoring pipe (5) are uniformly distributed in a circular ring shape, and the distance between the air outlets and a probe of the camera (3) is 100 mm; the other four compressed air inclined blowing pipes (6) are uniformly distributed in a ring shape at air outlets connected with the monitoring pipe (5), and the distance between the air outlets and the flange plate (7) is 150 mm; the pipe diameter of the compressed air inclined purging pipe (6) is 10 mm.

4. The boiler heating surface coking optimization soot blowing visual monitoring device as claimed in claim 1, wherein: the inner diameter of the monitoring tube (5) is 20-30 mm.

5. The boiler heating surface coking optimization soot blowing visual monitoring device as claimed in claim 1, wherein: the monitoring pipe (5) is horizontally arranged or declined for 5-10 degrees.

6. The boiler heating surface coking optimization soot blowing visual monitoring device as claimed in claim 1, wherein: the air compressor (4) is fixed on the base (2).