CN215112703U - Prevent blockking up flue gas transfer device and boiler equipment - Google Patents
Prevent blockking up flue gas transfer device and boiler equipment Download PDFInfo
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- CN215112703U CN215112703U CN202120896205.8U CN202120896205U CN215112703U CN 215112703 U CN215112703 U CN 215112703U CN 202120896205 U CN202120896205 U CN 202120896205U CN 215112703 U CN215112703 U CN 215112703U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
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Abstract
The utility model discloses a prevent blockking up flue gas transfer device and boiler equipment. The anti-blocking flue gas transfer device comprises a branch flue pipeline, a switching mechanism and an anti-blocking mechanism; the branch flue pipeline comprises a first end portion and a second end portion, the first end portion is connected to the middle-temperature section coal economizer and communicated with an economizer outlet pipeline of the middle-temperature section coal economizer, the second end portion is connected to the low-temperature section air preheater and communicated with the low-temperature section air preheater, the switching mechanism is connected to the first end portion to be used for opening or closing the branch flue pipeline, the anti-blocking mechanism comprises a blowing nozzle, the blowing nozzle is connected to the branch flue pipeline and close to the second end portion, and the blowing nozzle is used for blowing air into the branch flue pipeline. The anti-blocking flue gas transfer device can effectively reduce the heat loss of boiler exhaust smoke, improve the thermal efficiency of the boiler and prevent the pipeline from being blocked by ammonium bisulfate crystals.
Description
Technical Field
The utility model relates to a thermal power factory boiler field especially relates to a prevent blockking up flue gas transfer device and boiler equipment.
Background
Along with the improvement of the national environmental protection emission standard, the emission standard of the smoke pollutants in the thermal power generation industry is also improved. Many boilers adopt SNCR technology (Selective Non-Catalytic Reduction) to reduce the emission of nitrogen oxides in flue gas, namely, reducing agents (such as ammonia water, urea solution and the like) containing amino are sprayed into a furnace, and the Nitrogen Oxides (NO) in the flue gas are sprayed into the furnace within the temperature range of 850-1100 DEG CX) Reduction and removal to generate nitrogen (N)2) And water (H)2O)。
The existing boiler has the following flue gas flow: the flue gas generated by the boiler sequentially passes through the high-temperature superheater, the low-temperature superheater, the high-temperature section economizer, the medium-temperature section economizer, the low-temperature section economizer, the high-temperature section air preheater and the medium-temperature section air preheater and finally enters the low-temperature section air preheater. When ammonia water is used as a reducing agent to be sprayed into a hearth for reaction, ammonium bisulfate (NH4 HSO) is also generated4). Ammonium hydrogen sulfate (NH4 HSO)4) The melting point is 147 ℃, and the crystal is easy to crystallize at low temperature. When the flue gas passes through the superheater, the economizer, the high-temperature section air preheater and the medium-temperature section air preheater, the flue gas needs to exchange heat with the superheater, the economizer, the high-temperature section air preheater and the medium-temperature section air preheater, so that the temperature of the flue gas is reduced to be lower than 135 ℃ when the flue gas enters the low-temperature section air preheater, and therefore ammonium bisulfate in the flue gas is easy to crystallize and block a flue gas side pipeline of the low-temperature section air preheater, the heat exchange efficiency of the low-temperature section air preheater is reduced, the flue gas balance of a boiler is influenced, the negative pressure at the outlet of a boiler furnace is reduced or changed into positive pressure, and the load carrying capacity of the boiler is reduced. The heat exchange efficiency of the air preheater is reduced, so that the heat loss of boiler exhaust gas is improved, and the heat efficiency of the boiler is reduced.
SUMMERY OF THE UTILITY MODEL
Based on this, it is necessary to provide an anti-blocking flue gas transfer device and a boiler device, which can effectively reduce the heat loss of boiler exhaust gas, improve the thermal efficiency of the boiler, and prevent the pipeline from being blocked by ammonium bisulfate crystals.
An anti-blocking flue gas transfer device comprises a branch flue pipeline, a switching mechanism and an anti-blocking mechanism; the branch flue pipeline comprises a first end portion and a second end portion, the first end portion is used for being connected to a medium-temperature section coal economizer and communicated with an economizer outlet pipeline of the medium-temperature section coal economizer, the second end portion is used for being connected to a low-temperature section air preheater and communicated with the low-temperature section air preheater, the switching mechanism is connected to the first end portion so as to be used for opening or closing the branch flue pipeline, the anti-blocking mechanism comprises a blowing nozzle, the blowing nozzle is connected to the branch flue pipeline and close to the second end portion, and the blowing nozzle is used for blowing air into the branch flue pipeline.
In one embodiment, the switch mechanism includes a switch shutter, a lock catch and a lock member, the switch shutter is rotatably connected to the inner wall of the first end portion, the lock catch is fixedly connected to the inner wall of the second end portion, the switch shutter is arranged opposite to the lock catch, the lock member is connected to the switch shutter, and when the switch shutter rotates to close the branch flue duct, the lock member can be in locking fit with the lock catch.
In one embodiment, the rotation angle range of the switch flashboard is 0-90 degrees, the switch flashboard is overlapped with the radial surface of the branch flue pipeline when being reset, and the switch flashboard can rotate 90 degrees to completely open the branch flue pipeline.
In one embodiment, the switch mechanism further comprises a driving motor, the driving motor is electrically connected to the rotating shaft of the switch shutter, and the driving motor is used for driving the switch shutter to rotate.
In one embodiment, the anti-clogging mechanism further comprises a flow guide pipe connected to the blowing nozzle.
In one embodiment, the anti-blocking mechanism further comprises a blowing pipe, the blowing pipe is connected to the outside of the branch flue pipe, the guide pipe is connected with a plurality of blowing nozzles arranged at intervals, and the blowing pipe is communicated with the guide pipe.
In one embodiment, the plurality of air blowing nozzles are arranged on the flow guide pipe at equal intervals.
In one embodiment, the branch flue duct is of a flat structure, and the plurality of air blowing nozzles extend and are distributed in the width direction of the radial surface of the branch flue duct.
In one embodiment, the flue gas purification device further comprises a reinforcing rib, at least one reinforcing rib is arranged in the branch flue pipe, and the reinforcing rib extends along the axial direction of the branch flue pipe.
In one embodiment, the bypass flue duct includes a plurality of sub-ducts, the plurality of sub-ducts being connected in series, and an expansion joint being connected between at least one group of adjacent sub-ducts.
The utility model provides a boiler equipment, include boiler main body system and prevent blockking up flue gas transfer device, prevent blockking up flue gas transfer device and connect between the middle temperature section economizer and the low temperature section air preheater of boiler main body system, the first end connection of branch road flue pipeline in middle temperature section economizer and with middle temperature section economizer intercommunication, the second end connection of branch road flue pipeline in the low temperature section air preheater and with low temperature section air preheater intercommunication.
The anti-blocking flue gas transfer device can effectively reduce the heat loss of boiler exhaust smoke, improve the thermal efficiency of the boiler and prevent the pipeline from being blocked by ammonium bisulfate crystals. The boiler equipment normally operates, and the device is not put into operation. When the outlet smoke temperature of the low-temperature section air preheater rises, the outlet air temperature of the primary air and the secondary air of the boiler drops, and the upper limit of the air quantity of the primary air and the secondary air of the boiler drops more, namely the pipeline blockage between the low-temperature section air preheater and the medium-temperature section economizer is indicated. At the moment, firstly, the anti-blocking mechanism of the anti-blocking smoke gas transfer device is opened, the anti-blocking mechanism blows air into the branch flue pipeline through the air blowing nozzle, smoke dust accumulated in the branch flue pipeline is fluidized (when the anti-blocking smoke gas transfer device is not used, the branch flue pipeline is in a unidirectional closed state, so the smoke dust in the low-temperature section air preheater can slowly enter the branch flue pipeline and form accumulation), secondly, the switching mechanism is slowly opened, the outlet smoke gas temperature of the low-temperature section air preheater is observed, if the temperature rises, the normal operation of the anti-blocking smoke gas transfer device is indicated, finally, the opening degree of the switching mechanism is adjusted, the outlet smoke gas temperature is controlled to be between 180 ℃ and 200 ℃, and the anti-blocking smoke gas transfer device operates for at least 12 hours.
The anti-blocking flue gas transfer device is provided with the switch flashboard for opening or closing the branch flue pipeline. The shape and size of the switch flashboard are the same as those of the radial surface of the branch flue pipeline, the switch flashboard can rotate by 90 degrees, and when the switch flashboard is normally closed, the switch flashboard is positioned on the radial surface of the branch flue pipeline and can be occluded and closed with the lock catch at the opposite position through the locking piece; when the branch flue duct is opened fully, the switch flashboard rotates by 90 degrees to realize that the branch flue duct is opened fully, smoke completely passes through the branch flue duct, and when the switch mechanism opens the branch flue duct, the switch mechanism simultaneously seals the outlet pipeline of the medium-temperature-section economizer.
Foretell prevent blockking up flue gas transfer device sets up driving motor, driving motor and switch flashboard electric connection, and driving motor can access control system, realizes the remote control of switch flashboard.
Foretell prevent blockking up flue gas transfer device sets up the blowing pipe and blows through the blowing nozzle, and blowing of blowing nozzle can make the accumulational smoke and dust fluidization in the branch road flue pipeline.
Foretell prevent blockking up flue gas transfer device sets up the honeycomb duct in order to cooperate with a plurality of blowing mouths, and the air current in the honeycomb duct realizes homodisperse through the honeycomb duct, and the blowing mouth that the air current of dispersion set up through a plurality of intervals blows out, can realize that the multi-angle will be accumulational smoke and dust fluidization in the branch road flue pipeline.
The blowing nozzles of the anti-blocking smoke transfer device are arranged on the guide pipe at equal intervals, so that the flue dust accumulated in the branch flue pipeline can be fluidized at multiple angles.
Foretell prevent blockking up flue gas transfer device has improved branch road flue pipeline intensity through setting up the strengthening rib.
Foretell prevent blockking up flue gas transfer device is through setting up a plurality of subducts, and the installation and the dismantlement of branch road flue pipeline of being convenient for to at least a set of adjacent be connected with the expansion joint between the subduct to be adapted to the deformation of subduct.
Drawings
Fig. 1 is a schematic side view of an anti-clogging flue gas transfer device according to an embodiment of the present invention;
fig. 2 is a schematic view of a switching mechanism of the anti-blocking flue gas transfer device according to an embodiment of the present invention;
fig. 3 is a schematic front view of the anti-clogging flue gas transfer device according to an embodiment of the present invention;
fig. 4 is a schematic front view of an anti-blocking mechanism of the anti-blocking flue gas transferring device according to an embodiment of the present invention.
Description of the reference numerals
10. An anti-blocking flue gas transfer device; 100. a branch flue duct; 110. a first end portion; 120. a second end portion; 130. a subduct; 200. a switch mechanism; 210. a switch gate; 220. locking; 230. a locking member; 300. an anti-clogging mechanism; 310. a blowing nozzle; 320. a blowpipe; 330. a flow guide pipe; 400. reinforcing ribs; 500. an expansion joint; 600. a load-bearing vertical beam; 700. a load bearing beam; 20. an outlet pipeline of the middle-level economizer; 30. and a low-temperature section air preheater.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, one embodiment of the present invention provides an anti-clogging flue gas transfer device 10.
An anti-clogging flue gas transfer device 10 comprises a branch flue pipe 100, a switching mechanism 200 and an anti-clogging mechanism 300.
Referring to fig. 1, the bypass flue duct 100 includes a first end 110 and a second end 120. The first end portion 110 is connected to and communicates with the middle-temperature-stage economizer, and the second end portion 120 is connected to and communicates with the low-temperature-stage air preheater 30.
Referring to fig. 1 and 2, the switch mechanism 200 is connected to the first end 110 for opening or closing the branch flue duct 100, and when the switch mechanism 200 opens the branch flue duct 100, the switch mechanism 200 at least partially closes the intermediate-temperature economizer outlet duct 20 of the intermediate-temperature economizer at the same time.
Referring to fig. 3 and 4, the anti-jamming mechanism 300 includes a blowing nozzle 310. A blowing nozzle 310 is connected to the branch flue duct 100 near the second end 120, the blowing nozzle 310 being adapted to blow air into the branch flue duct 100.
Because the middle-temperature section economizer and the low-temperature section air preheater 30 of the boiler equipment are located at the upper and lower positions, the branch flue duct 100 is arranged in the vertical direction during installation, and the lower position of the branch flue duct 100 has a bending structure. Due to the bent structure, the branch flue duct 100 has an L-shaped structure. The blowing nozzle 310 is provided at the bent structure. The blowing nozzle 310 is used for blowing away dust accumulated at the bent structure. When the anti-blocking smoke transfer device 10 is not used, the branch flue pipe 100 is in a unidirectional closed state, so smoke dust in the low-temperature section air preheater can slowly enter the branch flue pipe 100 and form accumulation, and the air blowing nozzle 310 is used for blowing away dust accumulated at the bent structure.
In one embodiment, referring to fig. 3, the switch mechanism 200 includes a shutter plate 210, a latch 220, and a latch 230. The shutter switch 210 is rotatably connected to the inner wall of the first end portion 110, the latch 220 is fixedly connected to the inner wall of the first end portion 110, and the shutter switch 210 is disposed opposite to the latch 220. Latch 230 is connected to shutter plate 210. When shutter 210 is rotated to close off branch flue duct 100, lock 230 can lockingly engage latch 220. The anti-clogging flue gas transfer device 10 described above is provided with a switch shutter 210 for opening or closing the bypass flue duct 100. The shape and size of the switch flashboard 210 are the same as those of the radial surface of the branch flue duct 100, the switch flashboard 210 can rotate by 90 degrees, when the switch flashboard 210 is normally closed, the switch flashboard 210 is positioned on the radial surface of the branch flue duct 100, and the switch flashboard 210 can be occluded and closed with the lock catch 220 at the opposite position through the locking piece 230; when the branch flue duct 100 is fully opened, the switch flashboard 210 rotates 90 degrees, so that the branch flue duct 100 is fully opened, and the flue gas completely passes through the branch flue duct 100. In one embodiment, the switching mechanism 200 fully closes the outlet duct of the mid-temperature range economizer when the switching mechanism 200 opens the branch flue duct 100. It will be appreciated that in another embodiment, the switch mechanism 200 partially closes the outlet duct of the midrange economizer when the switch mechanism 200 opens the branch flue duct 100.
The switch gate 210 adopts 10mm OCr20Ni stainless steel plate and phi 108mm OCr20And welding the Ni steel pipes.
In one embodiment, the locking member 230 and the locking buckle 220 can be made of stainless steel plate to form an "L" shape, and the two "L" shapes can be engaged to close. It is understood that in other embodiments, the structures and shapes of the locking member 230 and the lock catch 220 are not limited to the above, and the structures and shapes of the locking member 230 and the lock catch 220 may also be other structures, such as a magnetic member and a magnetic mating member.
In one embodiment, the turning angle of the switch shutter 210 is in the range of 0 to 90 °, and the switch shutter 210 is overlapped with the radial surface of the branch flue duct 100 when being reset, and the switch shutter 210 can be turned by 90 ° to fully open the branch flue duct 100.
In one embodiment, the switch mechanism 200 further includes a drive motor. The driving motor is electrically connected to the rotating shaft of the switch shutter 210, and the driving motor is used for driving the switch shutter 210 to rotate. The drive motor is not shown in the drawings. The anti-blocking smoke transfer device 10 is provided with a driving motor, the driving motor is electrically connected with the switch flashboard 210, and the driving motor can be connected to a control system to realize remote control of the switch flashboard 210.
In one embodiment, please refer to fig. 4, the anti-clogging mechanism 300 further includes a flow guiding tube 330. The draft tube 330 is connected to the blowing nozzle 310. The anti-clogging flue gas transfer device 10 is provided with a guide pipe 330 and blows air through the air blowing nozzle 310, and the blowing air of the air blowing nozzle 310 can fluidize the accumulated flue dust in the branch flue duct 100.
In one embodiment, referring to fig. 4, the anti-clog mechanism 300 further includes a blowpipe 320, the blowpipe 320 being connected to the outside of the branch flue duct 100. The air blowing nozzles 310 are connected to the air guide pipe 330 at intervals, and the air blowing pipe 320 is communicated with the air guide pipe 330. The anti-blocking smoke transfer device 10 is provided with the guide pipe 330 to be matched with the plurality of blowing nozzles 310, the airflow in the blowing pipe 320 is uniformly dispersed through the guide pipe 330, the dispersed airflow is blown out through the plurality of blowing nozzles 310 arranged at intervals, and the multi-angle fluidization of the accumulated smoke dust in the branch flue pipeline 100 can be realized.
When the device is installed, the guide pipe 330 and the blowing pipe 320 are both disposed outside the branch flue duct 100, each blowing nozzle 310 penetrates through the side wall of the branch flue duct 100, and the outer wall of each blowing nozzle 310 is hermetically connected with the branch flue duct 100. The outer wall of each blowing nozzle 310 and the branch flue duct 100 may be sealed by a welded connection.
In one embodiment, as shown in fig. 4, the plurality of air blowing nozzles 310 are disposed at equal intervals on the air guide pipe 330. The plurality of blowing nozzles 310 of the anti-blocking flue gas transfer device 10 are arranged on the guide pipe 330 at equal intervals, so that the flue gas accumulated in the branch flue pipe 100 can be fluidized at multiple angles.
In one embodiment, as shown in fig. 3, the branch flue duct 100 is a flat structure, and the plurality of air blowing nozzles 310 are distributed to extend in the width direction of the radial surface of the branch flue duct 100. For example, in one embodiment, the plurality of air blowing nozzles 310 are distributed in a row. It is understood that in other embodiments, the plurality of air blowing nozzles 310 may be distributed in a plurality of rows. The flue branch is welded by a steel plate with the thickness of A3 and delta 6 mm.
In one embodiment, referring to fig. 1, the anti-clogging flue gas transfer device 10 further comprises a reinforcing rib 400. At least one reinforcing rib 400 is provided in the branch flue duct 100, and the reinforcing rib 400 extends in the axial direction of the branch flue duct 100. The anti-blocking flue gas transfer device 10 improves the strength of the branch flue duct 100 by arranging the reinforcing ribs 400.
In one embodiment, the reinforcing ribs 400 inside the flue branch are made of phi 57 seamless steel pipes; the reinforcing ribs 400 outside the flue branches are made of 20# channel steel.
In one embodiment, referring to FIG. 1, the bypass flue duct 100 includes a plurality of sub-ducts 130. The plurality of sub-pipes 130 are connected in series. An expansion joint 500 is connected between at least one group of adjacent subducts 130. The anti-clogging flue gas transfer device 10 facilitates the installation and disassembly of the branch flue duct 100 by providing a plurality of sub-ducts 130, and the expansion joint 500 is connected between at least one group of adjacent sub-ducts 130 to adapt to the deformation of the sub-ducts 130. The expansion joint 500 is installed at an upper position of the bent structure.
Preferably, the bypass flue duct 100 is externally wrapped with insulation, which is not shown in the drawings. The heat-insulating layer is made of an aluminum silicate fiber blanket, and the thickness of the heat-insulating layer is 100 mm. Specifically, an aluminum silicate fiber blanket (purchased from Hebei Huaneng, with dimensions of 3600mm × 610mm × 50mm and a bulk density of 105kg/m3) with a thickness of 100mm is wrapped outside the branch flue duct 100, so that the aluminum silicate fiber blanket and the branch flue duct 100 are compact and have no empty drum. Gaps and gaps are not required between the adjacent aluminum silicate fiber blankets, and the undercut width is not less than 50 mm. The faces of the branch flue duct 100 and the corners of the faces (four corners of the branch flue duct 100) are wrapped with aluminum silicate fiber blanket and compacted with wire mesh with a width of 40 mm.
In one embodiment, referring to fig. 1 and 2, the anti-clogging flue gas transferring device 10 further includes a load-bearing vertical beam 600 and a load-bearing cross beam 700. The load-bearing vertical beam 600 is arranged in the vertical direction. The load beam 700 is horizontally disposed. When the installation is carried out, the bearing vertical beam 600 is fixed on the ground, the top of the bearing cross beam 700 is connected to the bearing vertical beam 600, and the bearing vertical beam 600 and the bearing cross beam 700 are matched for supporting the branch flue duct 100. There is a distance between the load bearing vertical beams 600 and the bypass flue duct 100, which may be set to 500 mm.
The data of the relevant parameters of the anti-blocking flue gas transfer device 10 can be set as follows:
the width of branch flue duct 100 is 5400mm, and the thickness of branch flue duct 100 is 900 mm. The maximum height in the vertical direction of the branch flue duct 100 is 10000 mm. The branch flue duct 100 of L-shaped structure's partial height of vertical direction is 9250mm, and the partial length of horizontal direction is 3000mm, and one of them arm length 9250mm of branch flue duct 100's bending structure promptly, another arm length 3000 mm. The thickness of the horizontal portion of the branch flue duct 100 is 750 mm.
The switch shutter 210 is 780mm long, and the latch 220 is 120mm long. The thickness of the outlet pipeline of the medium-temperature coal economizer along the vertical direction is 800mm, and the distance between the hinged position of the switch flashboard 210 and the outlet pipeline of the medium-temperature coal economizer is 300 mm.
The cross section of the vertical load-bearing beam 600 is a square of 300mm × 300mm, and the height of the vertical load-bearing beam 600 is 9970 mm. It should be noted that the above parameter data only expresses one embodiment of the present invention, and the description thereof is more specific and detailed, but not construed as a limitation to each parameter.
An embodiment of the utility model also provides a boiler equipment.
A boiler plant comprises a boiler body system and an anti-blocking flue gas transfer device 10. The anti-blocking flue gas transfer device 10 is connected between a middle-temperature section economizer and a low-temperature section air preheater 30 of a main boiler body system, a first end portion 110 of the branch flue pipeline 100 is connected to the middle-temperature section economizer and communicated with an outlet pipeline 20 of the middle-temperature section economizer, and a second end portion 120 of the branch flue pipeline 100 is connected to the low-temperature section air preheater 30 and communicated with the low-temperature section air preheater 30. When the anti-blocking flue gas transfer device is used, the boiler equipment normally runs, and the anti-blocking flue gas transfer device 10 is not put into operation. When the outlet smoke temperature of the low-temperature section air preheater 30 rises, the outlet air temperature of the primary air and the secondary air of the boiler falls, and the upper limit of the air volume of the primary air and the secondary air of the boiler falls more, namely the pipeline between the low-temperature section air preheater 30 and the middle-temperature section economizer is blocked, at this time, the anti-blocking smoke transfer device 10 is put into operation. The anti-clogging flue gas transfer device 10 can increase the flue gas temperature during operation and reduce the thermal efficiency of the boiler, and aims to reduce the flue gas temperature for a long time, thereby reducing the heat loss of the flue gas and improving the efficiency of the boiler.
In one embodiment, temperature measuring devices are respectively installed on the left side and the right side of the low-temperature section air preheater 30 and the middle-temperature section economizer.
The anti-blocking flue gas transfer device 10 can effectively reduce the heat loss of the boiler exhaust gas, improve the thermal efficiency of the boiler and prevent the pipeline from being blocked by ammonium bisulfate crystals. When the boiler normally operates and the device is not put into operation, when the outlet smoke temperature of the low-temperature section air preheater 30 is found to rise, the outlet air temperature of the primary air and the secondary air of the boiler is found to fall, and the upper limit of the air volume of the primary air and the secondary air of the boiler is more reduced, namely the pipeline blockage between the low-temperature section air preheater 30 and the medium-temperature section economizer is shown. At this time, firstly, the anti-blocking mechanism 300 of the anti-blocking flue gas transfer device 10 is opened, the anti-blocking mechanism 300 blows air into the branch flue pipe 100 through the air blowing nozzle 310 to fluidize the smoke dust accumulated in the branch flue pipe 100, secondly, the switching mechanism 200 is slowly opened, meanwhile, the outlet flue gas temperature of the low-temperature section air preheater 30 is observed, if the temperature rises, the normal operation of the anti-blocking flue gas transfer device 10 is indicated, finally, the opening degree of the switching mechanism 200 is adjusted, the outlet flue gas temperature is controlled to be 180-200 ℃, and the operation of the anti-blocking flue gas transfer device is performed for at least 12 hours.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An anti-blocking flue gas transfer device is characterized by comprising a branch flue pipeline, a switching mechanism and an anti-blocking mechanism; the branch flue pipeline comprises a first end portion and a second end portion, the first end portion is used for being connected to a medium-temperature section coal economizer and communicated with an economizer outlet pipeline of the medium-temperature section coal economizer, the second end portion is used for being connected to a low-temperature section air preheater and communicated with the low-temperature section air preheater, the switching mechanism is connected to the first end portion so as to be used for opening or closing the branch flue pipeline, the anti-blocking mechanism comprises a blowing nozzle, the blowing nozzle is connected to the branch flue pipeline and close to the second end portion, and the blowing nozzle is used for blowing air into the branch flue pipeline.
2. The anti-clogging flue gas transfer device of claim 1, wherein the switch mechanism comprises a switch shutter, a lock catch and a lock member, the switch shutter is rotatably connected to the inner wall of the first end portion, the lock catch is fixedly connected to the inner wall of the first end portion, the switch shutter is disposed opposite to the lock catch, the lock member is connected to the switch shutter, and when the switch shutter rotates to close the branch flue duct, the lock member can be locked with the lock catch.
3. The anti-clogging flue gas transfer device according to claim 2, wherein the switch shutter plate has a rotation angle in the range of 0 to 90 °, and when the switch shutter plate is reset, the switch shutter plate coincides with the radial surface of the branch flue duct, and the switch shutter plate can rotate 90 ° to fully open the branch flue duct.
4. The anti-clogging flue gas transfer device according to claim 2, wherein the switch mechanism further comprises a driving motor electrically connected to the rotating shaft of the switch shutter, and the driving motor is configured to drive the switch shutter to rotate.
5. The anti-clogging flue gas transfer device according to any one of claims 1 to 3, wherein the anti-clogging mechanism further comprises a flow guide pipe connected to the blowing nozzle.
6. The anti-clogging flue gas transfer device according to claim 5, wherein the anti-clogging mechanism further comprises a blowpipe connected to the outside of the branch flue pipe, the flow guide pipe is connected to the plurality of blowing nozzles arranged at intervals, and the blowpipe is communicated with the flow guide pipe.
7. The anti-clogging flue gas transfer device of claim 6, wherein a plurality of said blowing nozzles are equally spaced on said draft tube;
and/or the branch flue pipeline is of a flat structure, and the plurality of air blowing nozzles extend and are distributed in the width direction of the radial surface of the branch flue pipeline.
8. The anti-clogging flue gas transfer device of any one of claims 1-3, further comprising a stiffener, at least one of the stiffeners being disposed within the bypass flue duct, the stiffener extending along an axial direction of the bypass flue duct.
9. The anti-clogging flue gas transfer device of any one of claims 1-3, wherein said bypass flue duct comprises a plurality of sub-ducts, said plurality of sub-ducts being connected in series, and an expansion joint being connected between at least one set of adjacent sub-ducts.
10. A boiler plant, comprising a boiler main body system and the anti-clogging flue gas transfer device as claimed in any one of claims 1 to 9, wherein the anti-clogging flue gas transfer device is connected between a middle temperature section economizer and a low temperature section air preheater of the boiler main body system, a first end of the branch flue pipe is connected to and communicated with the middle temperature section economizer, and a second end of the branch flue pipe is connected to and communicated with the low temperature section air preheater.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120896205.8U CN215112703U (en) | 2021-04-28 | 2021-04-28 | Prevent blockking up flue gas transfer device and boiler equipment |
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| CN202120896205.8U CN215112703U (en) | 2021-04-28 | 2021-04-28 | Prevent blockking up flue gas transfer device and boiler equipment |
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| CN215112703U true CN215112703U (en) | 2021-12-10 |
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