CN219530835U - Hood and wind distribution system - Google Patents
Hood and wind distribution system Download PDFInfo
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- CN219530835U CN219530835U CN202321116803.4U CN202321116803U CN219530835U CN 219530835 U CN219530835 U CN 219530835U CN 202321116803 U CN202321116803 U CN 202321116803U CN 219530835 U CN219530835 U CN 219530835U
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- air outlet
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Abstract
The utility model discloses a hood and an air distribution system, which belong to the technical field of hoods and comprise a supporting plate, an air guide pipe arranged on the supporting plate and a hood head arranged on the air guide pipe, wherein the air guide pipe is provided with a plurality of first air outlet channels; the air cap head is provided with a plurality of second air outlet channels, an air exhaust channel is formed through the first air outlet channels, the air outlet channels and the second air outlet channels, and the second air outlet channels are obliquely arranged relative to the support plate. The utility model achieves the technical effect of meeting the deep peak regulation of the circulating fluidized bed boiler.
Description
Technical Field
The utility model belongs to the technical field of hoods, and particularly relates to a hood and an air distribution system.
Background
The fluidized bed is widely applied to the fields of utility boilers, industrial boilers, comprehensive utilization of wastes and the like, and the fluidized bed clean and efficient power generation technology is one of clean coal technologies with the best commercialization degree, and the improvement of the fluidized bed technology has great significance for further solving the problems of energy shortage, environmental pollution and the like at present. The fluidized bed hood plays a key role in air distribution and combustion of the fluidized bed, and the structure and the quality of the hood directly influence the safe and stable operation of the fluidized bed.
At present, in the hood technology, an S-shaped hood, a columnar hood, a bell-type hood, a double-arrow hood and a T-shaped hood are generally adopted, and the operation requirements of the circulating fluidized bed boiler at different degrees can be met under most conditions. However, as the coal quality of the circulating fluidized bed boiler is worse and worse, the granularity of the coal is difficult to ensure, so that the blast cap is seriously worn, the fluidization quality of the circulating fluidized bed is affected, and accidents such as wear and slag leakage are frequently caused. And as the electric power market increasingly requires deep peak shaving of coal-fired power stations, the low-load fluidization quality is difficult to ensure due to the fact that the air quantity required for meeting combustion is reduced under the low-load working condition of the boiler. If the air quantity entering the air distribution plate is increased, the temperature of a hearth bed is reduced, the low-load stable combustion characteristic of the boiler is seriously influenced, and the cost of increasing the low-load deep peak regulation of the boiler is also caused.
Therefore, a new solution is needed to solve the above technical problems.
Disclosure of Invention
The utility model aims to solve the technical problem that the deep peak regulation of the circulating fluidized bed boiler is difficult to meet.
In order to solve the technical problems, the utility model provides a hood, which comprises: the air conditioner comprises a supporting plate, an air guide pipe arranged on the supporting plate and an air cap head arranged on the air guide pipe, wherein the air guide pipe is provided with a plurality of first air outlet channels; the air cap head is provided with a plurality of second air outlet channels, an air exhaust channel is formed through the first air outlet channels, the air outlet channels and the second air outlet channels, and the second air outlet channels are obliquely arranged relative to the support plate.
Optionally, the quantity of guide duct and the quantity of hood head are a plurality of, and a plurality of guide duct and a plurality of hood head one-to-one sets up, the guide duct with the hood head can dismantle the connection.
Optionally, the hood further comprises: the air guide pipe is connected with the air guide pipe, and the air guide pipe is connected with the air guide pipe.
Optionally, the first air outlet channel is obliquely arranged relative to the support plate.
Optionally, the hood head is enlarged in a direction approaching the support plate.
Optionally, the plurality of first air outlet channels are uniformly distributed along the circumferential direction of the air guide pipe.
Optionally, the distance between the first air outlet duct and the support plate is greater than the distance between the second air outlet duct and the support plate.
Optionally, the plurality of second air outlet channels are arranged at the bottom of the hood head, and the plurality of second air outlet channels are arranged at equal intervals.
Optionally, a through groove matched with the air guide pipe is formed in the supporting plate, one end of the air guide pipe penetrates through the through groove, the other end of the air guide pipe is connected with the hood head, and the other end of the air guide pipe and the hood head enclose the ventilation space.
According to still another aspect of the present utility model, there is further provided an air distribution system, including the hood, the support plate is disposed between the air chamber and the furnace chamber, and the air exhaust channel is respectively connected to the air chamber and the furnace chamber.
The beneficial effects are that:
the utility model provides a hood, which is characterized in that a support plate is provided with an air guide pipe, and the air guide pipe is provided with a plurality of first air outlet channels. The hood head is arranged on the air guide pipe, a space is reserved between the hood head and the support plate, the hood head and the air guide pipe are enclosed to form a ventilation space, the hood head is provided with a plurality of second air outlet channels, an air exhaust channel is formed through the first air outlet channels, the ventilation space and the second air outlet channels, and the second air outlet channels are obliquely arranged relative to the support plate. In the process of flowing through the exhaust channel, gas flow vortex can be eliminated when the first air outlet channel flows into the ventilation space, and then the gas is obliquely sprayed out from the second air outlet channel towards the support plate, so that higher fluidization wind speed can be formed in the space close to the support plate, large slag is prevented from being accumulated at the position close to the support plate, the gas can quickly flow towards the direction far away from the support plate after being restrained by the support plate, and the material of the circulating fluidized bed is fluidized in the upper space of the hood head at a lower flow speed. The lower air quantity is adopted to generate higher fluidization air speed in a space close to the supporting plate, so that the consumption of fluidization air quantity can be reduced when the boiler operates under various loads, and the boiler can perform combustion adjustment according to the optimal air quantity required by fuel combustion under any load. The low excess air coefficient can be realized under the low-load working condition of the boiler, the combustion temperature is improved, the low-load stable combustion, the stable fluidization and the emission of NOx are reduced. Thereby achieving the technical effect of meeting the deep peak regulation of the circulating fluidized bed boiler.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a hood according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the hood head of FIG. 1;
FIG. 3 is a second schematic structural view of the hood head of FIG. 1;
fig. 4 is a schematic structural view of a hood according to a second embodiment of the present utility model;
fig. 5 is a schematic structural view III of a hood according to an embodiment of the present utility model;
FIG. 6 is a schematic structural view of an air chamber and a furnace chamber in a hood according to an embodiment of the present utility model;
fig. 7 is a schematic structural view of a support plate in a hood according to an embodiment of the present utility model.
Detailed Description
The utility model discloses a hood, wherein an air guide pipe 2 is arranged on a supporting plate 1, and a plurality of first air outlet channels 21 are formed in the air guide pipe 2. The hood head 3 is arranged on the air guide pipe 2, a space is reserved between the hood head 3 and the support plate 1, the hood head 3 and the air guide pipe 2 are enclosed to form a ventilation space 32, the hood head 3 is provided with a plurality of second air outlet channels 31, an air exhaust channel is formed through the first air outlet channels 21, the ventilation space 32 and the second air outlet channels 31, and the second air outlet channels 31 are obliquely arranged relative to the support plate 1. In the process of flowing through the exhaust channel, the gas flow vortex is eliminated when the first air outlet duct 21 flows into the ventilation space 32, and then the gas is obliquely sprayed out from the second air outlet duct 31 towards the support plate 1, so that higher fluidization wind speed is formed in the space close to the support plate 1, the accumulation of large slag at the position close to the support plate 1 is avoided, the gas can quickly flow towards the direction far away from the support plate 1 after being restrained by the support plate 1, and the material of the circulating fluidized bed is fluidized at a lower flow rate in the upper space of the hood head 3. The lower air quantity is adopted to generate higher fluidization air speed in the space close to the supporting plate 1, so that the consumption of fluidization air quantity can be reduced when the boiler operates under various loads, and the boiler can perform combustion adjustment according to the optimal air quantity required by fuel combustion under any load. The low excess air coefficient can be realized under the low-load working condition of the boiler, the combustion temperature is improved, the low-load stable combustion, the stable fluidization and the emission of NOx are reduced. Thereby achieving the technical effect of meeting the deep peak regulation of the circulating fluidized bed boiler.
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present utility model are within the scope of the present utility model; wherein reference to "and/or" in this embodiment indicates and/or two cases, in other words, reference to a and/or B in the embodiments of the present utility model indicates two cases of a and B, A or B, and describes three states in which a and B exist, such as a and/or B, and indicates: only A and not B; only B and not A; includes A and B.
It will be understood that, although the terms "first," "second," etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments. Spatially relative terms, such as "below," "above," and the like, may be used herein to facilitate a description of one element or feature's relationship to another element or feature. It will be understood that the spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" would then be oriented "on" other elements or features. Thus, the exemplary term "below" may include both above and below orientations. The device may be oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Also, in embodiments of the present utility model, when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and the like are used in the embodiments of the present utility model for illustrative purposes only and are not intended to limit the present utility model.
Example 1
Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, fig. 1 is a schematic structural view of a hood according to an embodiment of the present utility model, fig. 2 is a schematic structural view of a hood head 3 according to fig. 1, fig. 3 is a schematic structural view of a hood head 3 according to fig. 1, fig. 4 is a schematic structural view of a hood according to an embodiment of the present utility model, fig. 5 is a schematic structural view of a hood according to an embodiment of the present utility model, fig. 6 is a schematic structural view of an air chamber 5 and a furnace chamber 6 in a hood according to an embodiment of the present utility model, and fig. 7 is a schematic structural view of a support plate 1 in a hood according to an embodiment of the present utility model. The embodiment of the utility model provides a hood, which comprises a support plate 1, an air guide pipe 2 arranged on the support plate 1 and a hood head 3 arranged on the air guide pipe 2, wherein the detailed description is now given to the support plate 1, the air guide pipe 2 arranged on the support plate 1 and the hood head 3 arranged on the air guide pipe 2 respectively:
for the support plate 1 and the air guide pipe 2 arranged on the support plate 1:
the support plate 1 may refer to an air distribution plate, a through groove 11 matched with the air guide pipe 2 may be provided on the support plate 1, one end of the air guide pipe 2 penetrates through the through groove 11, the other end of the air guide pipe 2 is connected with the hood head 3, and the other end of the air guide pipe 2 encloses a ventilation space 32 with the hood head 3. The air guide pipe 2 is provided with a plurality of first air outlet channels 21, the plurality of first air outlet channels 21 can be 1 first air outlet channel 21, 2 first air outlet channels 21, 3 first air outlet channels 21, 4 first air outlet channels 21 and the like, the first air outlet channels 21 are obliquely arranged relative to the support plate 1, and the plurality of first air outlet channels 21 are uniformly distributed along the circumferential direction of the air guide pipe 2. The number of the air guide pipes 2 and the number of the hood heads 3 are multiple, and the air guide pipes 2 and the hood heads 3 are arranged in one-to-one correspondence.
Specifically, the supporting plate 1 is provided with a space for accommodating the air guide pipe 2 and the hood head 3, the through groove 11 arranged on the supporting plate 1 can be respectively communicated with the air chamber 5 and the hearth 6, the air guide pipe 2 is communicated with the air chamber 5 after penetrating through the through groove 11, the air guide pipe 2 can be fixedly arranged on the supporting plate 1, and the supporting plate 1 can provide support for the air guide pipe 2. A plurality of first air outlet channels 21 can be formed in the top of the air guide pipe 2, and the first air outlet channels 21 can be obliquely arranged relative to the support plate 1, namely, an included angle formed by the intersection of an extension line of the first air outlet channels 21 and an extension line of the support plate 1 can be an acute angle. The inside of the air guide pipe 2 is hollow and can contain air circulation, the air can enter the inside of the air guide pipe 2 from the opening at the bottom of the air guide pipe 2, and the air entering the inside of the air guide pipe 2 is discharged from the plurality of first air outlet pore channels 21. The plurality of first air outlet passages 21 may be uniformly arranged along the circumferential direction of the air guide duct 2. The plurality of first air outlet channels 21 can also form a plurality of groups of first air outlet channels 21 which are mutually parallel to each other along the circumferential direction of the air guide pipe 2, for example, two groups of first air outlet channels 21 are sequentially arranged in the direction away from the supporting plate 1, each group comprises a plurality of first air outlet channels 21 which are positioned on the same plane, namely, the connecting lines of the plurality of first air outlet channels 21 in each group are in a ring shape, so that a plurality of first air outlet channels 21 can be arranged at the bottom of the air guide pipe 2, and the air inside the air guide pipe 2 can be discharged quickly.
For the hood head 3 provided on the air duct 2:
a space is reserved between the hood head 3 and the supporting plate 1, a ventilation space 32 is formed by enclosing the hood head 3 and the air guide pipe 2, a plurality of second air outlet channels 31 are formed at the bottom of the hood head 3, so that an air exhaust channel is formed through the first air outlet channels 21, the ventilation space 32 and the second air outlet channels 31, and air can be discharged from the second air outlet channels 31 along the air exhaust channel after entering the air guide pipe 2 from the air chamber 5. The second air outlet duct 31 is provided in an inclined arrangement with respect to the support plate 1. The hood head 3 is enlarged in a direction toward the support plate 1. The second air outlet channels 31 are disposed at the bottom of the hood head 3, and the second air outlet channels 31 are disposed at equal intervals. The distance between the first air outlet duct 21 and the support plate 1 is larger than the distance between the second air outlet duct 31 and the support plate 1, so that the air enters from the top and is discharged from the bottom.
Specifically, the ventilation space 32 formed by enclosing the hood head 3 and the air guide pipe 2 can accommodate the air flowing out of the first air outlet duct 21 on the air guide pipe 2, the ventilation space 32 can be an annular space, and the air can be discharged from the second air outlet duct 31 at the bottom of the hood head 3 after entering the ventilation space 32. The second air outlet duct 31 is inclined with respect to the support plate 1, i.e. the angle at which the extension of the second air outlet duct 31 intersects the extension of the support plate 1 may be an acute angle, or α may be an acute angle as shown in fig. 5. Because the hood head 3 can bear the weight pressure of ash, acting force exists between ash particles, namely a stacking angle exists, so that the second air outlet duct 31 at the bottom of the hood head 3 is not easy to block, and ash particles are not easy to reverse channeling. The anti-wear material is arranged on one side of the support plate 1 close to the hood head 3, the hood head 3 is at a certain height from the support plate 1, so that the hood head 3 and the anti-wear material positioned on the support plate 1 have a certain distance, and gas can flow in the direction close to the support plate 1 at an inclined angle after being discharged from the second air outlet duct 31. In this way, during the process of entering the support plate 1 from the bottom of the hood head 3, the gas will flow downwards in the space with the height H1, and then turn upwards. Since the fluidization of the circulating fluidized bed boiler mainly depends on wind, and the wind speed plays a key role, the higher the flow speed is in a certain range, the better the fluidization quality of particles is, and after the gas flows downwards from the second air outlet hole channels 31, the gas flows upwards when being restrained by the air distribution plate, so that the wind speed of the region between the hood head 3 and the wear-resistant material on the support plate 1 is improved. For a circulating fluidized bed boiler with wide screen, as most coarse particles stay at the lower part of a dense-phase zone, higher fluidization air speed is also required, so that the fluidization quality is improved.
It should be noted that, as shown in fig. 4, when the fluidizing gas is fixed, the gas flows downward at a first flow rate 7 in the space with a height H1 to the support plate 1, the downward flowing gas occupies a certain area space of the support plate 1, flows upward at a second flow rate 71 at a certain upward angle under the constraint of the support plate 1, the gas between the hood heads 3 gathers in the space between the hood heads 3, flows upward at a third flow rate 72 in the space with a height H2, and finally enters the upper space of the hood heads 3 at a lower fourth flow rate 73 in the space with a height H3 to fluidize the material of the circulating fluidized bed, and the fourth flow rate 73 is the velocity of the fluidizing air in the circulating fluidized bed. Since the circulating fluidized bed boiler has coarser particles along the bottom material of the support plate 1, the first flow rate 7, the second flow rate 71, the third flow rate 72 and the fourth flow rate 73 are sequentially reduced in size, thereby increasing the flow of the bottom coarse particles and preventing the accumulation of large slag in the region between the support plate 1 and the hood head 3. As only the large-particle materials at the bottom are in a fluidized state in the circulating fluidized bed boiler, coking can be avoided after the gas flow rate at the bottom of the supporting plate 1 is improved. Therefore, the consumption of fluidization air can be greatly reduced, for the low-load working condition of the circulating fluidized bed, higher fluidization air speed can be generated at the bottom of the supporting plate 1 by adopting lower air quantity, meanwhile, as the air discharged from the bottom of the hood head 3 can form a thick air film in a region close to the whole supporting plate 1, the accumulation of large slag at the bottom can be prevented, the flow of the large slag is facilitated, the consumption of fluidization air quantity can be reduced when the boiler runs under various loads, the boiler can perform combustion adjustment according to the optimal air quantity required by fuel combustion no matter under any load, low excessive air coefficient can be realized under low load, the combustion temperature can be improved, and the low-load stable combustion, stable fluidization and NOx emission reduction can be realized.
It should be noted that the hood head 3 is enlarged in a direction approaching the support plate 1, that is, the ventilation space 32 formed by enclosing the hood head 3 and the air guide pipe 2 is a variable cross-section, and the cross-section can be sequentially reduced in a direction approaching the support plate 1. After the gas required for fluidization is sprayed into the ventilation space 32 from the first air outlet duct 21 of the air guide pipe 2 through the air chamber 5 in an inclined downward manner, the capacity of the gas can be expanded, so that the flow rate of the gas can be reduced after the gas flows into the ventilation space 32, and the fullness of the gas in the ventilation space 32 is facilitated. In the process that the gas flows in the ventilation space 32 along the direction approaching the second air outlet channel 31 at the fifth flow rate 74, the sixth flow rate 75 and the seventh flow rate 76 in sequence, the gas is expanded in sequence, and then flows out from the second air outlet channel 31 at the first flow rate 7. Due to the reduction of the flow rate of the gas entering the ventilation space 32, the gas flowing vortex formed when the gas flows through the inside of the air guide pipe 2 and the first air outlet duct 21 positioned in the air guide pipe 2 can be eliminated, and the blockage of the second air outlet duct 31 positioned on the hood head 3 or the first air outlet duct 21 positioned on the air guide pipe 2 caused by the back suction of fine particles under the condition of suddenly changing the air quantity can be prevented, and the possibility that fine ash generated due to the uneven flow rate in the ventilation space 32 is sucked into the hood head 3 by the vortex can be reduced. The resistance of the blast cap is reduced, the pressure drop of primary air of the circulating fluidized bed is reduced, and then the power consumption of the fan is reduced. In addition, the second air outlet channels 31 on the hood head 3 are all set to have smaller diameters, a layer of air curtains can be formed around the hood head 3, and the number of the second air outlet channels 31 can be equal to or greater than 6. The inclination angle of the second air outlet duct 31 positioned on the hood head 3 can be adjusted according to the elevation H1 between the second air outlet duct 31 positioned on the hood head 3 and the supporting plate 1 and the arrangement pitch S between the two adjacent hood heads 3, so that the particles are prevented from wearing the hood heads 3 in the wind speed steering process.
In order to facilitate the installation and replacement of the hood head 3, the hood provided by the embodiment of the utility model further comprises a sealing plate 4 and a fastening piece 41, wherein one end of the sealing plate 4 is connected with the air guide pipe 2, and the other end of the sealing plate 4 penetrates through the hood head 3 and then is detachably connected with the fastening piece 41.
Specifically, one end of the sealing plate 4, which is close to the support plate 1, is connected with the top end of the air guide pipe 2, and one end of the sealing plate 4, which is close to the support plate 1, can be matched with an opening at the top end in the air guide pipe 2, so that the top end of the air guide pipe 2 can be sealed by one end of the sealing plate 4, which is close to the support plate 1. The other end of the sealing plate 4, which is close to the supporting plate 1, is provided with a protruding part which can penetrate through the hood head 3, for example, a through hole for the protruding part to penetrate is formed in the top end of the hood head 3, and the protruding part penetrates through the through hole and then is detachably connected with the fastening piece 41. The fastener 41 may include a nut, and the protruding portion may be provided with an external thread, and an internal thread matching the external thread may be provided in the nut, so that the nut is screwed with the protruding portion, thereby improving convenience in mounting and replacing the hood head 3.
The utility model provides a hood, wherein an air guide pipe 2 is arranged on a supporting plate 1, and a plurality of first air outlet holes 21 are formed in the air guide pipe 2. The hood head 3 is arranged on the air guide pipe 2, a space is reserved between the hood head 3 and the support plate 1, the hood head 3 and the air guide pipe 2 are enclosed to form a ventilation space 32, the hood head 3 is provided with a plurality of second air outlet channels 31, an air exhaust channel is formed through the first air outlet channels 21, the ventilation space 32 and the second air outlet channels 31, and the second air outlet channels 31 are obliquely arranged relative to the support plate 1. In the process of flowing through the exhaust channel, the gas flow vortex is eliminated when the first air outlet duct 21 flows into the ventilation space 32, and then the gas is obliquely sprayed out from the second air outlet duct 31 towards the support plate 1, so that higher fluidization wind speed is formed in the space close to the support plate 1, the accumulation of large slag at the position close to the support plate 1 is avoided, the gas can quickly flow towards the direction far away from the support plate 1 after being restrained by the support plate 1, and the material of the circulating fluidized bed is fluidized at a lower flow rate in the upper space of the hood head 3. The lower air quantity is adopted to generate higher fluidization air speed in the space close to the supporting plate 1, so that the consumption of fluidization air quantity can be reduced when the boiler operates under various loads, and the boiler can perform combustion adjustment according to the optimal air quantity required by fuel combustion under any load. The low excess air coefficient can be realized under the low-load working condition of the boiler, the combustion temperature is improved, the low-load stable combustion, the stable fluidization and the emission of NOx are reduced. Thereby achieving the technical effect of meeting the deep peak regulation of the circulating fluidized bed boiler.
In order to describe the air distribution system provided by the utility model in detail, the embodiment of the utility model describes the same hood in detail, and based on the same inventive concept, the utility model also provides the air distribution system, and the detail is shown in the second embodiment.
Example two
The second embodiment of the utility model provides an air distribution system, which comprises the hood, wherein the supporting plate 1 is arranged between the air chamber 5 and the hearth 6, and the air exhaust channel is respectively communicated with the air chamber 5 and the hearth 6.
The utility model provides an air distribution system, which is characterized in that an air guide pipe 2 is arranged on a supporting plate 1, and a plurality of first air outlet holes 21 are formed in the air guide pipe 2. The hood head 3 is arranged on the air guide pipe 2, a space is reserved between the hood head 3 and the support plate 1, the hood head 3 and the air guide pipe 2 are enclosed to form a ventilation space 32, the hood head 3 is provided with a plurality of second air outlet channels 31, an air exhaust channel is formed through the first air outlet channels 21, the ventilation space 32 and the second air outlet channels 31, and the second air outlet channels 31 are obliquely arranged relative to the support plate 1. In the process of flowing through the exhaust channel, the gas flow vortex is eliminated when the first air outlet duct 21 flows into the ventilation space 32, and then the gas is obliquely sprayed out from the second air outlet duct 31 towards the support plate 1, so that higher fluidization wind speed is formed in the space close to the support plate 1, the accumulation of large slag at the position close to the support plate 1 is avoided, the gas can quickly flow towards the direction far away from the support plate 1 after being restrained by the support plate 1, and the material of the circulating fluidized bed is fluidized at a lower flow rate in the upper space of the hood head 3. The lower air quantity is adopted to generate higher fluidization air speed in the space close to the supporting plate 1, so that the consumption of fluidization air quantity can be reduced when the boiler operates under various loads, and the boiler can perform combustion adjustment according to the optimal air quantity required by fuel combustion under any load. The low excess air coefficient can be realized under the low-load working condition of the boiler, the combustion temperature is improved, the low-load stable combustion, the stable fluidization and the emission of NOx are reduced. Thereby achieving the technical effect of meeting the deep peak regulation of the circulating fluidized bed boiler.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same, and although the present utility model has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present utility model.
Claims (10)
1. A hood, the hood comprising: the air conditioner comprises a supporting plate, an air guide pipe arranged on the supporting plate and an air cap head arranged on the air guide pipe, wherein the air guide pipe is provided with a plurality of first air outlet channels; the air cap head is provided with a plurality of second air outlet channels, an air exhaust channel is formed through the first air outlet channels, the air outlet channels and the second air outlet channels, and the second air outlet channels are obliquely arranged relative to the support plate.
2. A hood according to claim 1, characterized in that: the number of the air guide pipes and the number of the hood heads are multiple, the air guide pipes and the hood heads are arranged in one-to-one correspondence, and the air guide pipes are detachably connected with the hood heads.
3. The hood according to claim 2, further comprising: the air guide pipe is connected with the air guide pipe, and the air guide pipe is connected with the air guide pipe.
4. A hood according to claim 1, characterized in that: the first air outlet channel is obliquely arranged relative to the supporting plate.
5. A hood according to claim 1, characterized in that: the hood head is expanded towards the direction close to the supporting plate.
6. A hood according to claim 1, characterized in that: the plurality of first air outlet channels are uniformly distributed along the circumferential direction of the air guide pipe.
7. The hood according to claim 6, wherein: the distance between the first air outlet duct and the supporting plate is larger than the distance between the second air outlet duct and the supporting plate.
8. A hood according to claim 1, characterized in that: the second air outlet channels are arranged at the bottom of the hood head and are arranged at equal intervals.
9. A hood according to claim 1, characterized in that: the support plate is provided with a through groove matched with the air guide pipe, one end of the air guide pipe penetrates through the through groove, the other end of the air guide pipe is connected with the hood head, and the other end of the air guide pipe and the hood head enclose the ventilation space.
10. An air distribution system, characterized by comprising the hood according to any one of claims 1 to 9, wherein the support plate is arranged between an air chamber and a furnace chamber, and the air exhaust channel is respectively communicated with the air chamber and the furnace chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321116803.4U CN219530835U (en) | 2023-05-09 | 2023-05-09 | Hood and wind distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321116803.4U CN219530835U (en) | 2023-05-09 | 2023-05-09 | Hood and wind distribution system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219530835U true CN219530835U (en) | 2023-08-15 |
Family
ID=87650676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321116803.4U Active CN219530835U (en) | 2023-05-09 | 2023-05-09 | Hood and wind distribution system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219530835U (en) |
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2023
- 2023-05-09 CN CN202321116803.4U patent/CN219530835U/en active Active
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