CN210568561U - Control system for secondary air box of opposed firing boiler - Google Patents
Control system for secondary air box of opposed firing boiler Download PDFInfo
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- CN210568561U CN210568561U CN201921301230.6U CN201921301230U CN210568561U CN 210568561 U CN210568561 U CN 210568561U CN 201921301230 U CN201921301230 U CN 201921301230U CN 210568561 U CN210568561 U CN 210568561U
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- air box
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Abstract
The utility model discloses a hedging combustion boiler secondary bellows control system. The utility model comprises a data processor, a controller, a pressure measuring device, a secondary air temperature measuring device, a smoke component detecting device, an air box pressure adjusting baffle and an electric actuating mechanism; the data processor receives detection data of the pressure measuring device, the secondary air temperature measuring device and the smoke component detecting device through signal transmission lines respectively; the controller is respectively connected with the data processor and the electric actuating mechanism through signal transmission lines and controls the electric actuating mechanism according to the processing result of the data processor; the electric actuator is used for controlling the angle of the air box pressure adjusting baffle. The utility model discloses a regulation bellows pressure adjusting baffle angle has overcome the not enough of the uneven and unable accurate control of each cyclone burner secondary amount of wind distribution of current secondary bellows, is maintaining the secondary wind cyclone blade and moves under the prerequisite of ideal angle, is favorable to the secondary amount of wind of each combustor of real-time accurate control.
Description
Technical Field
The utility model relates to an opposed firing boiler secondary bellows, specifically speaking are opposed firing boiler secondary bellows control system.
Background
The opposed combustion is a common combustion mode at present in China, has the characteristics of wide coal type adaptability, easy and uniform control of furnace chamber heat load and the like, and is widely applied to power station boilers.
At present, a secondary air box of an opposed firing boiler generally adopts a large air box structure, namely, a plurality of burners commonly use one secondary air box. The secondary air box is limited by a secondary air box structure and a secondary air box air inlet mode, the pressure of the secondary air box in the width direction is usually distributed unevenly (the total pressure of a common middle burner is higher than the total pressure of burners on two sides), the negative pressure of the middle part of a hearth is higher than the negative pressure of areas near water-cooled walls on two sides, the pressure difference of the middle burner is higher than the pressure difference of the burners on two sides due to the comprehensive effect of the two aspects, so that the secondary air quantity of each burner in the same secondary air box has large deviation, and the insufficient secondary air quantity of the burners on two sides can bring about the problems of high-temperature corrosion of the water.
The outer secondary air of the swirl burner of the existing hedging combustion boiler is generally not provided with an air volume adjusting device, each burner is not provided with an independent air volume measuring device, the air volume of the outer secondary air of the swirl burner is adjusted generally through the angle of an outer secondary air swirl blade, but the adjustment of the outer secondary air swirl blade can influence the shape and the size of a backflow area, and meanwhile, the secondary air volume of each swirl burner cannot be accurately matched with the required target secondary air volume due to the lack of the independent air volume measuring device.
Therefore, on the premise of maintaining the secondary air swirl vanes to operate at an ideal angle, accurate control of the secondary air volume of each swirl burner is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
To the problem that above-mentioned prior art exists, the utility model provides an offset combustion boiler secondary bellows control system to overcome the not enough of each cyclone burner secondary amount of wind distribution of current secondary bellows and unable accurate control.
Therefore, the utility model adopts the following technical scheme: a control system for a secondary air box of an opposed combustion boiler comprises a data processor, a controller, a pressure measuring device, a secondary air temperature measuring device, a smoke component detecting device, an air box pressure adjusting baffle and an electric actuating mechanism;
the pressure measuring device is used for detecting the pressure of the secondary air pipe of the cyclone burner; the secondary air temperature measuring device is arranged in the secondary air box; the flue gas component detection device is used for detecting the adherent CO and H of the water wall of the high-temperature corrosion area2S atmosphere; the air box pressure adjusting baffle is fixed in the secondary air box;
the data processor receives detection data of the pressure measuring device, the secondary air temperature measuring device and the smoke component detecting device through signal transmission lines respectively; the controller is respectively connected with the data processor and the electric actuating mechanism through signal transmission lines and controls the electric actuating mechanism according to the processing result of the data processor;
the electric actuator is used for controlling the angle of the pressure adjusting baffle of the air box.
Furthermore, the pressure measuring device comprises an inlet pressure measuring device and an outlet pressure measuring device, the inlet pressure measuring device is used for detecting the inlet pressure of the secondary air pipe of the cyclone burner, and the outlet pressure measuring device is used for detecting the outlet pressure of the secondary air pipe of the cyclone burner.
Furthermore, the air box pressure adjusting baffle plates are multiple, and each air box pressure adjusting baffle plate is installed between two adjacent secondary air pipes of the cyclone burner.
Furthermore, the air box pressure adjusting baffle can rotate around the center of the air box pressure adjusting baffle, and the center of the air box pressure adjusting baffle is parallel to the centers of the secondary air pipes of the cyclone combustors.
Furthermore, the air box pressure adjusting baffle is connected with a rotating shaft, and the rotating shaft is parallel to the centers of the secondary air pipes of the cyclone combustors; the electric actuating mechanism is used for driving the rotating shaft to rotate so as to drive and control the rotation of the air box pressure adjusting baffle.
The utility model provides a pair of secondary bellows control system, through adjusting bellows pressure adjusting baffle angle, overcome the not enough of the uneven and unable accurate control of each cyclone burner secondary air volume distribution of current secondary bellows, adjust the secondary amount of wind of each combustor in real time, and further optimize the regulation to the secondary amount of wind of each combustor according to the testing result of the water-cooling wall adherence atmosphere under typical load, under the prerequisite of maintaining secondary wind cyclone blade operation in ideal angle, be favorable to the secondary amount of wind of each combustor of real-time accurate control.
Drawings
Fig. 1 is a schematic structural view of the present invention;
3 fig. 3 2 3 is 3 a 3 sectional 3 view 3 taken 3 along 3 the 3 line 3 a 3- 3 a 3 in 3 fig. 3 1 3. 3
In the figure, 1-secondary air box, 2-data processor, 3-controller, 4-cyclone burner secondary air pipe, 5-inlet pressure measuring device, 6-outlet pressure measuring device, 7-secondary air temperature measuring device, 8-flue gas component detecting device, 9-air box pressure adjusting baffle, 10-electric actuator, 11-signal transmission line, 12-rotating shaft and 13-water cooling wall.
Detailed Description
The following detailed description is made of specific embodiments of the present invention with reference to the accompanying drawings, so as to make the technical solution of the present invention easier to understand and master. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The embodiment provides a secondary air box control system, as shown in fig. 1, comprising a secondary air box 1, a data processor 2, a controller 3, a cyclone burner secondary air pipe 4, an inlet pressure measuring device 5, an outlet pressure measuring device 6, a secondary air temperature measuring device 7, a smoke component detecting device 8, an air box pressure adjusting baffle 9, an electric actuator 10, a signal transmission line 11, a rotating shaft 12 and a water wall 13, wherein the secondary air temperature measuring device 7 is arranged in the secondary air box 1.
Referring to fig. 1, the data processor 2 receives the detection data of the inlet pressure measuring device 5, the outlet pressure measuring device 6, the secondary air temperature measuring device 7 and the smoke component detecting device 8 through the signal transmission line 11. The controller 3 is connected with the data processor 2 and the electric actuator 10 through a signal transmission line, the electric actuator 10 is controlled according to the processing result of the data processor 2, and the electric actuator 10 is used for controlling the angle of the air box pressure adjusting baffle 9.
And the inlet pressure measuring device 5 is used for detecting the inlet pressure of the secondary air pipe 4 of the cyclone burner.
And the outlet pressure measuring device 6 is used for detecting the outlet pressure of the secondary air pipe 4 of the cyclone burner.
The secondary air temperature measuring device 7 is used for detecting the secondary air temperature of the secondary air box 1.
The flue gas component detection device 8 is used for detecting the adherence CO and H of the water wall 13 of the high-temperature corrosion area2And (5) an S atmosphere.
Each air box pressure adjusting baffle 9 is arranged between two adjacent cyclone burner secondary air pipes 4, and if N cyclone burner secondary air pipes 4 are arranged in the secondary air box 1, N-1 air box pressure adjusting baffles 9 are arranged.
Referring to fig. 2, the air box pressure adjusting baffle 9 is fixed in the secondary air box 1 and can rotate around a rotating shaft 12 thereof, and the rotating shaft 12 is parallel to the centers of the secondary air pipes 4 of the cyclone burners so as to change the flow areas of the secondary air boxes at different positions and further adjust the inlet pressure of the secondary air pipes 4 of the cyclone burners.
The utility model discloses a set up bellows pressure regulation baffle in the secondary bellows to adjust the secondary amount of wind of each combustor in real time, and according to the secondary amount of wind of the further optimization regulation of water-cooling wall adherence atmosphere's of typical load testing result to each combustor, under the prerequisite of maintaining secondary air whirl blade operation in ideal angle, be favorable to the secondary amount of wind of each combustor of real-time accurate control.
Claims (5)
1. A control system for a secondary air box of an opposed firing boiler is characterized by comprising a data processor (2), a controller (3), a pressure measuring device, a secondary air temperature measuring device (7), a smoke component detecting device (8), an air box pressure adjusting baffle (9) and an electric actuating mechanism (10);
the pressure measuring device is used for detecting the pressure of the secondary air pipe (4) of the cyclone burner; the secondary air temperature measuring device (7) is arranged in the secondary air box (1); the smoke component detection device (8) is used for detecting the adherence CO and H of the water-cooled wall of the high-temperature corrosion area2S atmosphere; the air box pressure adjusting baffle (9) is fixed in the secondary air box (1);
the data processor (2) receives detection data of the pressure measuring device, the secondary air temperature measuring device (7) and the smoke component detecting device (8) through signal transmission lines respectively; the controller (3) is respectively connected with the data processor (2) and the electric actuator (10) through signal transmission lines, and controls the electric actuator (10) according to the processing result of the data processor (2);
the electric actuator (10) is used for controlling the angle of the bellows pressure adjusting baffle (9).
2. A control system for a secondary air box of an opposed firing boiler according to claim 1, wherein said pressure measuring means comprises an inlet pressure measuring means (5) and an outlet pressure measuring means (6), said inlet pressure measuring means (5) being adapted to detect an inlet pressure of said cyclone burner secondary air duct (4), said outlet pressure measuring means (6) being adapted to detect an outlet pressure of said cyclone burner secondary air duct (4).
3. A opposed firing boiler secondary air box control system according to claim 1 or 2, wherein the air box pressure adjusting baffle (9) is plural, and each air box pressure adjusting baffle (9) is installed between two adjacent cyclone burner secondary air pipes (4).
4. A control system for secondary windboxes of opposed firing boilers according to claim 1 or 2, characterized in that the windbox pressure regulating flap (9) rotates around its center, which is parallel to the center of each cyclone burner secondary air duct (4).
5. A control system for a secondary air box of an opposed firing boiler according to claim 4, wherein the air box pressure adjusting baffle (9) is connected with a rotating shaft (12), and the rotating shaft (12) is parallel to the center of each cyclone burner secondary air pipe (4); the electric actuator (10) is used for driving the rotating shaft (12) to rotate, so that the air box pressure adjusting baffle is driven and controlled to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301230.6U CN210568561U (en) | 2019-08-12 | 2019-08-12 | Control system for secondary air box of opposed firing boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301230.6U CN210568561U (en) | 2019-08-12 | 2019-08-12 | Control system for secondary air box of opposed firing boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210568561U true CN210568561U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921301230.6U Active CN210568561U (en) | 2019-08-12 | 2019-08-12 | Control system for secondary air box of opposed firing boiler |
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| Country | Link |
|---|---|
| CN (1) | CN210568561U (en) |
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2019
- 2019-08-12 CN CN201921301230.6U patent/CN210568561U/en active Active
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