CN220911477U - Online monitoring system of pulverized coal industrial boiler burner - Google Patents
Online monitoring system of pulverized coal industrial boiler burner Download PDFInfo
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- CN220911477U CN220911477U CN202322236938.0U CN202322236938U CN220911477U CN 220911477 U CN220911477 U CN 220911477U CN 202322236938 U CN202322236938 U CN 202322236938U CN 220911477 U CN220911477 U CN 220911477U
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Abstract
The utility model discloses an on-line monitoring system of a pulverized coal industrial boiler burner, which comprises an observation hole, a camera, a pressure guiding device and a control system, wherein the observation hole is formed in a furnace wall adjacent to or opposite to the furnace wall where the burner is positioned, an observation hole door is arranged outside an outer hole of the observation hole, and an electric driving device is arranged on the observation hole door; the cameras are arranged outside the hearth and are in one-to-one correspondence with the burners, and the centers of the cameras, the observation holes and the burners form a straight line in space; one end of the pressure guiding device is arranged on the inner wall of the hearth, the other end of the pressure guiding device is connected with a pressure switch, and the pressure switch is arranged between the power supply and the electric driving device in series; the control system is electrically connected with the electric driving device. The utility model realizes the on-line remote monitoring of the burner nozzle, does not need manual field operation or boiler shutdown, can observe at any time according to the needs, and has high reliability and operability.
Description
Technical Field
The utility model relates to the technical field of pulverized coal industrial boilers, in particular to an on-line monitoring system of a burner of a pulverized coal industrial boiler.
Background
One or more pulverized coal burners are arranged on the pulverized coal industrial boiler body, and burner nozzles are connected with the inner wall of the hearth. When the precombustion chamber burner is adopted, the air-powder mixture is ignited in the burner, and after flame enters a hearth, unburned or unburnt pulverized coal particles continue to burn; when the non-precombustion chamber burner is adopted, the wind-powder mixture is sprayed out from the nozzle and enters the hearth for combustion. No matter which type of burner is adopted, due to the reasons of coal quality change, improper operation, unreasonable structural design and the like, the problems of coking, deformation caused by overheating and the like often occur near the burner nozzle, which lead to the consequences of poor combustion effect, equipment damage and the like, and seriously affect the economic and safe operation of the boiler. Because dangerous factors such as high-temperature smoke and the like are sprayed outwards from the high-temperature environment of the hearth and the positive pressure of the hearth, when the boiler operates, the burner nozzle is difficult to visually inspect, so that the burner nozzle can be manually observed through a manhole door or a fire observation hole after the boiler is generally stopped, and the problem is difficult to find in the first time. On a power station boiler or an industrial boiler, a flame industrial television is adopted to observe the flame combustion state on line traditionally, but the purpose of setting and using the flame industrial television is to monitor whether flame is extinguished or not, instead of observing a burner nozzle per se, the size of a fire observation hole arranged on the flame industrial television is small, the fire observation hole is generally made of high-temperature-resistant transparent glass, but is often polluted by ash and slag in a hearth, and a camera is generally fixed in focus and cannot optically change the magnification. Thus, conventional flame industrial televisions are difficult to apply for the purpose of viewing burner ports, both in view and in configuration, performance and effect.
Disclosure of utility model
The present utility model aims to solve at least one of the technical problems in the related art to some extent.
To this end, an embodiment of the utility model proposes an on-line monitoring system for a pulverized coal industrial boiler burner.
The utility model provides an on-line monitoring system of a pulverized coal industrial boiler burner, which comprises the following components:
The observation hole is formed in a furnace wall adjacent to or opposite to the furnace wall where the burner is located, an observation hole door is arranged outside the outer hole of the observation hole, and an electric driving device is arranged on the observation hole door;
the cameras are arranged outside the hearth and are in one-to-one correspondence with the burners, and the centers of the cameras, the observation holes and the burners form a straight line in space;
The pressure guiding device is provided with one end which is arranged on the inner wall of the hearth, the other end is connected with a pressure switch, and the pressure switch is arranged between the power supply and the electric driving device in series;
and the control system is electrically connected with the electric driving device.
In some embodiments, the system further comprises a warning light, wherein the warning light is electrically connected with the control system, and the warning light flashes before and after the observation hole door is opened.
In some embodiments, the pressure switch is configured to open when the furnace pressure value measured by the pressure inducing device is below a certain value of the ambient atmospheric pressure.
In some embodiments, the control system is a PLC control system or a DCS control system.
In some embodiments, the camera is connected to the control room via a network.
In some embodiments, the camera is a cradle head, and the maximum magnification is not less than 5X.
In some embodiments, when the observation hole is formed in a furnace wall adjacent to the furnace wall where the burner is located, an angle formed by a connecting line of the camera and the burner nozzle and a normal line of the furnace wall where the observation hole is located is 15 ° -45 °.
In some embodiments, when the observation hole is formed in a furnace wall opposite to the furnace wall where the burner is located, the camera and the observation hole are located at the same height position as the burner.
Compared with the prior art, the utility model has the beneficial effects that:
The utility model realizes the on-line remote monitoring of the burner nozzle, does not need manual field operation or boiler shutdown, can observe at any time according to the needs, and has high reliability and operability.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic view of a porthole door remote control;
FIG. 2 is a schematic diagram of a furnace and burner arrangement in an industrial boiler;
FIG. 3 is a schematic view of a view port and camera arrangement;
Fig. 4 is a schematic view in horizontal cross section of the viewing aperture shown in fig. 3 positioned on the right wall.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
The traditional production system needs to observe the state of the burner nozzle, generally needs to stop the boiler to observe, can not observe at any time according to the needs, or needs to manually carry a high-temperature endoscope, and the endoscope is inserted into the hearth from a hearth fire observation hole to observe. The high-temperature endoscope has high cost and heavy weight, and needs to be connected with compressed air or process water for cooling on site, so that the operation difficulty and the workload are high, and if the operation staff are damaged by high-temperature smoke when meeting the positive pressure of the hearth. In addition, high temperature endoscopes often do not allow for optical zoom and are inconvenient to view. Aiming at the problems existing in the prior art, the utility model provides an on-line monitoring system for a burner of a pulverized coal industrial boiler.
An on-line monitoring system for a burner of a pulverized coal industrial boiler according to an embodiment of the present utility model will be described with reference to fig. 1 to 4.
The utility model relates to an on-line monitoring system of a pulverized coal industrial boiler burner, which comprises a viewing hole 1, a camera 2, a pressure guiding device, a control system and a warning lamp.
The observation hole 1 is arranged on a furnace wall 8 adjacent to or opposite to the furnace wall 8 where the burner 3 is positioned, the observation hole door is arranged outside an outer hole of the observation hole 1, when the observation hole door is opened, the inner environment of the hearth is communicated with the external atmospheric environment, the network camera 2 arranged outside the outer wall 9 of the hearth faces the observation hole 1, the nozzle of the burner 3 and the nearby area can be seen, and the centers of the camera 2, the observation hole 1 and the burner 3 are in a straight line in space. An electric driving device is arranged on the observation hole door, and the opening and closing of the observation hole door are controlled through the electric driving device. The observation hole door is normally closed, and when the electric driving device is powered off, the observation hole door is automatically closed.
The pressure guiding device is a conventional part for measuring the negative pressure of the hearth, one end of the pressure guiding device is arranged on the inner wall 10 of the hearth, the other end of the pressure guiding device is connected with a pressure switch, the pressure switch is arranged between the power supply and the electric driving device in series, and the pressure switch is set to be started when the hearth pressure value measured by the pressure guiding device is lower than a certain value of the external atmospheric pressure. When the furnace chamber negative pressure is higher than a certain value, if the observation hole door is opened, the risk of high-temperature smoke is generated, so that the pressure switch is set to be turned on when the measured value of the pressure guiding device (namely, the furnace chamber pressure) is lower than a certain value. In some embodiments, the pressure switch is turned on when the measurement of the pressure inducing device is below-100 Pa.
The camera 2 is arranged outside the hearth, the camera 2 is arranged in one-to-one correspondence with the burner 3, the camera 2 is connected to the control room through a network, an operator views pictures through a monitor of the control room and remotely controls the camera 2, and the camera 2 comprises operations of setting parameters of the camera 2, controlling the movement of a cradle head of the camera 2, zooming and the like. The camera 2 adopts a tripod head type, can horizontally and vertically adjust angles, supports optical zooming, has a maximum magnification of not less than 5X, focuses, apertures, exposure time and ISO parameters to support manual setting, supports two imaging modes of visible light and infrared, and is provided with an infrared light source.
When the observation hole 1 is formed in the furnace wall 8 adjacent to the furnace wall 8 where the burner 3 is positioned, the center line of the camera 2 is not coincident with and parallel to the center line of the burner 3, namely, the camera 2 is seen from the oblique side to the nozzle of the burner 3. The connection line (line of sight of observation) between the camera 2 and the nozzle of the burner 3 forms an acute angle with the normal line of the furnace wall 8 where the observation hole 1 is located, the angle is preferably between 15 ° and 45 °, preferably between 25 ° and 35 °, and the smaller angle means that the width of the observation hole door can be opened to be smaller, which is beneficial to reducing the work load and the construction range of the hole opening, reducing the damage of potential smoke ejection risks to the surroundings when the observation hole door is opened, and reducing the air inlet quantity of the environment to the furnace chamber when the hole door is opened so as to minimize the interference to the combustion of the furnace chamber. The lower limit of the angle of view of the camera 2 is preferably not higher than 4 °.
When the observation hole is formed in the furnace wall 8 opposite to the furnace wall 8 where the burner 3 is located, the camera 2, the observation hole 1 and the burner 3 are located at the same height position.
The control system is a PLC control system or a DCS control system, the control system is electrically connected with the electric driving device, and the control system issues a command to control the opening and closing of the electric driving device. The warning lamp is electrically connected with the control system and flashes before and after the observation hole door is opened.
As shown in fig. 1, the porthole door is controlled to open and close by an electric drive. The observation hole door is normally closed, and when the electric driving device is powered off, the observation hole door is automatically closed. The pressure switch controls the power supply of the electric driving device, and when the pressure switch is turned on, the electric driving device is electrified; when the pressure switch is opened, the electric driving device is powered off. When the electric driving device is powered off, the observation hole door can still be opened by a person on site. The electric drive is remotely turned on and off by an operator via a control system. After the control system issues an opening instruction, the warning lamp flashes for a period of time to remind people who may work nearby the site, and the electric driving device starts to open the hole door, so that the flow is similar when the hole door is closed.
For a pulverized coal industrial boiler with a rated heat load of 116MW, the cross section size of a hearth (inner wall) is 8m multiplied by 8m, and the thickness of a furnace wall 8 is 0.35m (refer to FIG. 2). The burners 3 are installed on the front wall 4 of the boiler and are divided into an upper layer and a lower layer, and 2 burners 3 are arranged on each layer. The center line of the burner 3 is perpendicular to the front wall 4, and the burner 3 of the same layer is symmetrically arranged about the center line of the boiler, and the distance from the center line of the boiler is 1.6m. The burner 3 nozzle is circular with a diameter of 1.2m.
For the burner 3 near one corner of the right wall 5 and the front wall 4, in order to observe the nozzle of the burner 3, an observation hole 1 is formed in the right wall 5 of the hearth at a height level with the central line of the burner 3, and a camera 2 is installed at the outer position of the furnace at the same height (refer to the lower part of fig. 3). The vertical distance between the camera 2 and the right wall 5 is 0.56m, the vertical distance between the camera 2 and the front wall 4 is 1.80m, and the connecting line between the camera 2 and the center of the nozzle of the burner 3 forms an angle of 28.5 degrees with the normal line of the right wall 5. The connection line of the leftmost end and the rightmost end of the nozzle of the camera 2 and the burner 3 respectively intersects with the right wall 5 at a line segment AB and a line segment CD, and the vertical planes of the two line segments are respectively marked as V1 and V2. The connection line of the uppermost end and the lowermost end of the nozzle of the burner 3 and the camera 2 is respectively intersected with the inner wall of the right wall 5, an inner hole formed by jointly cutting the right wall 5 through the horizontal plane and the V1 and V2 planes of the intersection points is the observation hole 1 to be opened, the minimum hole is formed, and if the size is further reduced, no matter how the camera 2 zooms, the local position of the nozzle of the burner 3 can not be seen by the camera 2. The horizontal cross section of the observation hole 1 is trapezoid, and the hole widths of the inner and outer wall surfaces are 0.20m and 0.14m, respectively (refer to fig. 4). The vertical cross-sectional shape of the observation hole 1 was rectangular, and the height was taken to be 0.4m. The included angle of the connecting line between the camera 2 and the leftmost end and the rightmost end of the nozzle of the burner 3 is 9 degrees, and the lower limit of the view angle of the camera 2 is correspondingly less than or equal to 9 degrees. The lower limit of the view angle of the camera 2 is selected to be larger, so that the view is overlarge, and besides the nozzle, the hearth outer wall 9 around the observation hole 1 is also seen. Because the camera 2 is at a certain distance from the furnace wall 8, and the hearth is negative pressure during normal operation, the working condition of the camera 2 is not bad, so that the conventional commercial product for security and protection can be adopted. In this embodiment, the pan-tilt ball machine is selected, the maximum 23 times of optical zoom is supported, the range of the view angle is 3 ° -58 °, which is approximately equivalent to 8 times of optical zoom at the 9 ° view angle, and the pan-tilt ball machine has a telescope effect, so that the details of the nozzle can be observed well, but the imaging of the nozzle which is seen at the "squint" angle is elliptical, and the horizontal width is narrower than the vertical height, so that the whole height cannot be seen when the maximum horizontal width of the nozzle is just seen, and if the full view of the nozzle is seen, the view angle of the camera 2 needs to be set at about 4.5 ° by the optical zoom. On the contrary, if more details are to be seen, the angle of view should be adjusted to 9 ° or more, that is, the angle of view is observed with a magnification of 8-23 times, and the horizontal and vertical angles of the pan/tilt of the camera 2 are adjusted in cooperation.
For the burner 3 near one corner of the left wall 6 and the front wall 4, in order to observe the nozzle of the burner 3, an observation hole 1 is formed at a height which is flush with the central line of the burner 3 on a rear wall 7 opposite to the front wall 4, a camera 2 is arranged at the outer position of the furnace at the same height, and the camera 2, the observation hole 1 and the nozzle of the burner 3 are on the same straight line (refer to the upper part of fig. 3). The vertical distance between the camera 2 and the right wall is 0.56m. The observation hole 1 has a rectangular horizontal cross section, and the width of the inner (outer) wall hole is 0.15m. The camera 2 selects a tripod head ball machine, the full view of a nozzle can be observed at an angle of 8 degrees, and more details can be observed through further optical amplification.
When the observation hole 1 is formed in the furnace wall 8 opposite to the furnace wall 8 where the burner 3 is located, the nozzle can be seen in front, and the observation hole 1 is smaller in size, but is more suitable for the lower burner 3, and the application of the upper burner 3 is limited to a certain extent. The boiler is operated by operating at least one layer of the upper layer or the lower layer burner 3, and when the observation object belongs to the upper layer burner 3, the upper layer burner 3 is always shielded by at least one of the self flame or the flame of the lower layer burner 3. Therefore, the position of the observation hole 1 is set according to the specific situation in practical application.
The utility model realizes the on-line remote monitoring of the burner 3 nozzle, does not need manual field operation or boiler shutdown, adopts the camera 2 which is a mature commercial grade product, and has low price and strong performance and operability. The "squint" trapezoidal viewing aperture 1 provided by the present utility model provides a more compact size and more flexible field arrangement scheme for viewing aperture 1 than conventional viewing aperture 1.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms may be directed to different embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. An on-line monitoring system for a pulverized coal industrial boiler burner, comprising:
The observation hole is formed in a furnace wall adjacent to or opposite to the furnace wall where the burner is located, an observation hole door is arranged outside the outer hole of the observation hole, and an electric driving device is arranged on the observation hole door;
the cameras are arranged outside the hearth and are in one-to-one correspondence with the burners, and the centers of the cameras, the observation holes and the burners form a straight line in space;
The pressure guiding device is provided with one end which is arranged on the inner wall of the hearth, the other end is connected with a pressure switch, and the pressure switch is arranged between the power supply and the electric driving device in series;
and the control system is electrically connected with the electric driving device.
2. The on-line monitoring system of pulverized coal industrial boiler burner of claim 1, further comprising a warning light electrically connected to the control system, the warning light flashing before and after the viewport door is opened.
3. The on-line monitoring system of pulverized coal industrial boiler burner according to claim 1, wherein the pressure switch is set to be turned on when the furnace pressure value measured by the pressure guiding device is lower than the external atmospheric pressure by a certain value.
4. The on-line monitoring system of pulverized coal industrial boiler burner according to claim 1, wherein the control system is a PLC control system or a DCS control system.
5. The on-line monitoring system of pulverized coal industrial boiler burner as set forth in claim 1, wherein the camera is connected to the control room through a network.
6. The on-line monitoring system of pulverized coal industrial boiler burner of claim 5, wherein the camera is a pan-tilt type, and the maximum magnification is not lower than 5X.
7. The on-line monitoring system of pulverized coal industrial boiler burner according to claim 1, wherein when the observation hole is formed in a furnace wall adjacent to the furnace wall where the burner is located, an angle formed between a connecting line of the camera and the burner nozzle and a normal line of the furnace wall where the observation hole is located is 15 ° -45 °.
8. The on-line monitoring system of pulverized coal industrial boiler burner according to claim 1, wherein the camera and the observation hole are positioned at the same height position as the burner when the observation hole is formed in a furnace wall opposite to the furnace wall where the burner is positioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322236938.0U CN220911477U (en) | 2023-08-18 | 2023-08-18 | Online monitoring system of pulverized coal industrial boiler burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322236938.0U CN220911477U (en) | 2023-08-18 | 2023-08-18 | Online monitoring system of pulverized coal industrial boiler burner |
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| Publication Number | Publication Date |
|---|---|
| CN220911477U true CN220911477U (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322236938.0U Active CN220911477U (en) | 2023-08-18 | 2023-08-18 | Online monitoring system of pulverized coal industrial boiler burner |
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| Country | Link |
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| CN (1) | CN220911477U (en) |
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2023
- 2023-08-18 CN CN202322236938.0U patent/CN220911477U/en active Active
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