CN219640240U - Horizontal air preheater for coal-fired circulating fluidized bed boiler - Google Patents
Horizontal air preheater for coal-fired circulating fluidized bed boiler Download PDFInfo
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- CN219640240U CN219640240U CN202320201477.0U CN202320201477U CN219640240U CN 219640240 U CN219640240 U CN 219640240U CN 202320201477 U CN202320201477 U CN 202320201477U CN 219640240 U CN219640240 U CN 219640240U
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003546 flue gas Substances 0.000 claims abstract description 32
- 238000005299 abrasion Methods 0.000 claims abstract description 7
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims 3
- 230000035939 shock Effects 0.000 claims 3
- 239000000428 dust Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 6
- 239000000779 smoke Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A horizontal air preheater for a coal-fired circulating fluidized bed boiler relates to an air preheater. The utility model aims to solve the problems that the existing air preheater is large in vibration and poor in operation stability, dust is easy to accumulate in a flue, and heat exchange is affected. The utility model comprises a flue gas pipeline, a primary air pipeline, a secondary air pipeline, a heat exchange tube group, a plurality of anti-abrasion protection tiles and a plurality of shockproof plates, wherein the flue gas pipeline is vertically arranged, the heat exchange tube group is horizontally inserted on the side wall of the flue gas pipeline, the primary air pipeline and the secondary air pipeline are respectively communicated with the heat exchange tube group, the heat exchange tube group comprises a plurality of tubes which are arranged in a matrix, the upper part of the outer side wall of the uppermost row of tubes is fixedly connected with the anti-abrasion protection tiles, the plurality of shockproof plates are vertically arranged at intervals, and each shockproof plate is respectively fixedly connected with one side of a row of tubes. The utility model is used for the circulating fluidized bed boiler.
Description
Technical Field
The utility model relates to an air preheater, in particular to a horizontal air preheater for a coal-fired circulating fluidized bed boiler.
Background
The air preheater is a common device for improving the heat exchange of the boiler and is widely applied to the fields of circulating fluidized bed boilers, waste heat boilers, dust collectors and the like. For a circulating fluidized bed boiler, an air preheater is an essential important structure, and the heat exchange efficiency of the air preheater has great influence on the performance of the boiler;
the circulating fluidized bed boiler is a boiler applying the clean coal burning technology with energy saving and low emission, and the process flow is that a great amount of circulating materials are contained in a hearth, and smoke gas formed in the fuel burning process carries the materials to the upper part of the hearth and tangentially enters a cyclone separator at the outlet of the hearth. The separator separates materials from smoke through centrifugal action, the smoke enters the air preheater from top to bottom, and longitudinally flushes the pipes for circulating air inside, so that the smoke discharging temperature can be reduced, and the boiler efficiency can be improved; the incomplete loss of combustion is reduced; the heated air enters the hearth to improve the theoretical combustion temperature and strengthen the radiation heat transfer of the hearth, thereby improving the heat efficiency of the boiler.
The inlet of the horizontal air preheater in the conventional technology often adopts a structure with a shape like a Chinese character 'ji', no shock-proof plate and the like, the air preheater vibrates greatly, and the angle of an inlet flue is too small, so that ash is easy to accumulate, the heat exchange of the air preheater is reduced, and the boiler efficiency is influenced.
Disclosure of Invention
The utility model aims to solve the problems that the existing air preheater is large in vibration and poor in operation stability, ash is easy to accumulate in a flue, and heat exchange is affected, and further provides a horizontal air preheater for a coal-fired circulating fluidized bed boiler.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a horizontal air heater for coal-fired circulating fluidized bed boiler includes flue gas pipeline, primary air pipeline, overgrate air pipeline, heat transfer nest of tubes, a plurality of abrasionproof protects tile and a plurality of shock-proof board, the vertical setting of flue gas pipeline, the horizontal cartridge of heat transfer nest of tubes is on the lateral wall of flue gas pipeline, primary air pipeline and overgrate air pipeline communicate with the heat transfer nest of tubes respectively, the heat transfer nest of tubes is including being the many pipes that the matrix arrangement set up, the upper portion of the outer lateral wall of the calandria all rigid coupling of uppermost has the abrasionproof to protect the tile, a plurality of shock-proof boards vertical interval sets up, every shock-proof board rigid coupling is in one side of a row of pipe respectively.
Further, the anti-abrasion protection tile comprises a plurality of curved surface protection tiles, a plurality of jackets and a plurality of straight protection tiles, wherein the plurality of curved surface protection tiles are uniformly distributed on the upper portion of the pipe along the length direction, one jacket is arranged between every two adjacent curved surface protection tiles, the jackets are sleeved on the outer side walls of the end parts of the curved surface protection tiles, and the lower ends of the curved surface protection tiles are vertically fixedly connected with the straight protection tiles.
Further, a group of hooks are fixedly connected to the upper side and the lower side of the shockproof plate, the hooks on the upper side are fixedly connected to the outer side of the wear-resistant protection tile, and the hooks on the lower side are fixedly connected to the outer side of the lowest calandria.
Further, the upper end of the flue gas pipeline is provided with an inlet flue, two sides of the inlet flue are inclined planes which incline outwards from bottom to top, and an included angle between each inclined plane and the horizontal plane is 38 degrees.
Further, a metal expansion joint is arranged between the upper end of the flue gas pipeline and the inlet flue.
Further, the heat exchange tube group comprises three groups of heat exchange tube groups which are sequentially arranged from bottom to top, the primary air pipeline comprises a primary air first tube section and a primary air second tube section, and the secondary air pipeline comprises a secondary air first tube section and a secondary air second tube section;
a primary cold air inlet, a secondary air second pipe section inlet, a primary air second pipe section outlet and a secondary air second pipe section outlet are sequentially arranged on the side wall of one side of the flue gas pipeline from bottom to top, and a primary air first pipe section inlet, a secondary air first pipe section outlet, a primary hot air outlet and a secondary hot air outlet are sequentially arranged on the side wall of the other side of the flue gas pipeline from bottom to top; the primary cold air inlet is arranged corresponding to the primary air first pipe section inlet, the secondary cold air inlet is arranged corresponding to the secondary air first pipe section inlet, and the heat exchange pipe group at the lower part is arranged between the primary cold air inlet and the secondary cold air inlet and between the primary air first pipe section inlet and the secondary air first pipe section inlet; the inlet of the second pipe section of the secondary air is correspondingly arranged with the outlet of the first pipe section of the secondary air, the inlet of the second pipe section of the primary air is correspondingly arranged with the outlet of the first pipe section of the primary air, and the middle heat exchange pipe group is arranged between the inlet of the second pipe section of the secondary air, the inlet of the second pipe section of the primary air, the outlet of the first pipe section of the secondary air and the outlet of the first pipe section of the primary air; the primary air second pipe section outlet is correspondingly arranged with the primary hot air outlet, the secondary air second pipe section outlet is correspondingly arranged with the secondary hot air outlet, and the upper heat exchange pipe group is arranged between the primary air second pipe section outlet, the secondary air second pipe section outlet, the primary hot air outlet and the secondary hot air outlet;
the lower end of the primary air first pipe section is connected with the inlet of the primary air first pipe section, the upper end of the primary air first pipe section is connected with the outlet of the primary air first pipe section, the lower end of the primary air second pipe section is connected with the inlet of the primary air second pipe section, and the upper end of the primary air second pipe section is connected with the outlet of the primary air second pipe section; the lower end of the secondary air first pipe section is connected with the inlet of the secondary air first pipe section, the upper end of the secondary air first pipe section is connected with the outlet of the secondary air first pipe section, the lower end of the secondary air second pipe section is connected with the inlet of the secondary air second pipe section, and the upper end of the secondary air second pipe section is connected with the outlet of the secondary air second pipe section.
Further, the first pipe section of the primary air and the first pipe section of the secondary air and the second pipe section of the primary air and the second pipe section of the secondary air are fixedly connected into an integrated communication box, and the outer side of the integrated communication box is fixedly connected with a lifting lug.
Further, in the lower heat exchange tube group, the outer side of the end part of the tube adjacent to the primary cold air inlet and the secondary cold air inlet is sleeved with a sleeve.
Further, in the heat exchange tube group at the lower part, the tail ends of the tube ends adjacent to the primary cold air inlet and the secondary cold air inlet are inserted on a steel plate, and the steel plate is arranged at the outer side of the flue gas pipeline.
Further, in the lower heat exchange tube group, the material of the tubes is weather-resistant steel.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a horizontal air preheater for a coal-fired circulating fluidized bed boiler, which adopts a novel structural form with a corrugated metal expansion joint, an anti-vibration plate, an anti-corrosion sleeve and an anti-abrasion protection tile, and can enable a cyclone separator to have higher heat exchange efficiency, thereby providing better performance for the coal-fired circulating fluidized bed boiler and the like. The utility model improves the heat exchange efficiency of the existing air preheater, reduces the exhaust gas temperature on the coal-fired circulating fluidized bed boiler, reduces accumulated ash, prevents pipe abrasion, prevents pipe corrosion, improves the boiler efficiency, improves the structural stability, better improves the combustion condition of the boiler fuel, reduces incomplete combustion loss and further improves the boiler efficiency.
Drawings
FIG. 1 is a front view of the overall structure of the present utility model;
fig. 2 is a side view of the flue gas duct 1 according to the utility model;
FIG. 3 is an enlarged view of FIG. 1 at I;
FIG. 4 is an enlarged view at II in FIG. 1;
fig. 5 is an enlarged view at III in fig. 2;
FIG. 6 is an enlarged view at IV in FIG. 1;
fig. 7 is an enlarged view at V in fig. 1.
Detailed Description
The first embodiment is as follows: referring to fig. 1 to 7, this embodiment is described with respect to a horizontal air preheater for a coal-fired circulating fluidized bed boiler, which includes a flue gas duct 1, a primary air duct 2, a secondary air duct 3, a heat exchange tube set 4, a plurality of wear-resistant protection tiles 5 and a plurality of shock-proof plates 6, wherein the flue gas duct 1 is vertically disposed, the heat exchange tube set 4 is horizontally inserted on a side wall of the flue gas duct 1, the primary air duct 2 and the secondary air duct 3 are respectively communicated with the heat exchange tube set 4, the heat exchange tube set 4 includes a plurality of tubes 7 arranged in a matrix, the wear-resistant protection tiles 5 are fixedly connected to an upper portion of an outer side wall of the uppermost tube 7, the plurality of shock-proof plates 6 are vertically arranged at intervals, and each shock-proof plate 6 is fixedly connected to one side of a row of tubes 7.
The abrasion-proof protection tile 5 is added to effectively prevent the abrasion of the pipe 7 caused by the longitudinal scouring of the smoke and dust carried in the smoke
The vibration-proof plate 6 prevents resonance of the air preheater caused by the flow rate and temperature of the flue gas by calculating a proper distance (when the flue gas and the temperature of the flue gas are fixed, the smaller the flue width is, the larger the ratio of the sound wave frequency to the shedding frequency is, and resonance cannot occur when the ratio is larger than 1.5), so that vibration of the air preheater is prevented to a great extent, and the operation stability of the air preheater is improved.
The second embodiment is as follows: referring to fig. 1 to 7, in this embodiment, the wear-resistant protection tile 5 includes a plurality of curved protection tiles 5-1, a plurality of jackets 5-2 and a plurality of straight protection tiles 5-3, the curved protection tiles 5-1 are uniformly distributed on the upper portion of the pipe 7 along the length direction, a jacket 5-2 is disposed between every two adjacent curved protection tiles 5-1, the jacket 5-2 is sleeved on the outer side wall of the end portion of the curved protection tile 5-1, and the lower end of the curved protection tile 5-1 is vertically and fixedly connected with the straight protection tile 5-3. Other compositions and connection modes are the same as in the first embodiment.
The curved surface protection tile 5-1 is fixedly connected through the sheath 5-2.
And a third specific embodiment: referring to fig. 1 to 7, in the present embodiment, a group of hooks 6-1 are fixedly connected to the upper and lower sides of the shock-proof plate 6, the hooks 6-1 on the upper side are fixedly connected to the outer side of the wear-proof protection tile 5, and the hooks 6-1 on the lower side are fixedly connected to the outer side of the lowest calandria 7. Other compositions and connection modes are the same as those of the second embodiment.
The vibration-proof plate 6 is welded with the wear-proof protection tile 4 so as to be fixed with the pipe 7.
The specific embodiment IV is as follows: in this embodiment, the upper end of the flue gas pipe 1 is provided with an inlet flue 8, two sides of the inlet flue 8 are inclined planes inclined from bottom to top to outside, and an included angle between the inclined planes and a horizontal plane is 38 degrees. Other compositions and connection modes are the same as in the first embodiment.
The inlet angle of the inlet flue 8 is 38 degrees, so that ash is not easy to accumulate and the ash accumulation is effectively prevented.
Fifth embodiment: the present embodiment will be described with reference to fig. 1 to 7, in which a metal expansion joint 9 is provided between the upper end of the flue gas duct 1 and the inlet flue 8. Other compositions and connection modes are the same as those of the fourth embodiment.
The square corrugated metal expansion joint 9 (the size is 210mm multiplied by 80 mm) is welded with the inlet flue 8 through angle steel, so that noise can be reduced to a certain extent, harm caused by vibration is reduced, the service life of the air preheater is prolonged, and the degree of displacement caused by hot flue gas circulation can be improved.
Specific embodiment six: the heat exchange tube group 4 of the present embodiment includes three groups of heat exchange tube groups 4 arranged in this order from bottom to top, the primary air duct 2 includes a primary air first tube section and a primary air second tube section, and the secondary air duct 3 includes a secondary air first tube section and a secondary air second tube section;
a primary cold air inlet 1-1, a secondary cold air inlet 1-2, a secondary air second pipe section inlet 1-3, a primary air second pipe section inlet 1-4, a primary air second pipe section outlet 1-5 and a secondary air second pipe section outlet 1-6 are sequentially arranged on the side wall of one side of the flue gas pipeline 1 from bottom to top, and a primary air first pipe section inlet 1-7, a secondary air first pipe section inlet 1-8, a secondary air first pipe section outlet 1-9, a primary air first pipe section outlet 1-10, a primary hot air outlet 1-11 and a secondary hot air outlet 1-12 are sequentially arranged on the side wall of the other side of the flue gas pipeline 1 from bottom to top; the primary cold air inlet 1-1 is arranged corresponding to the primary air first pipe section inlet 1-7, the secondary cold air inlet 1-2 is arranged corresponding to the secondary air first pipe section inlet 1-8, and the lower heat exchange pipe group 4 is arranged between the primary cold air inlet 1-1, the secondary cold air inlet 1-2 and the primary air first pipe section inlet 1-7 and the secondary air first pipe section inlet 1-8; the secondary air second pipe section inlet 1-3 is arranged corresponding to the secondary air first pipe section outlet 1-9, the primary air second pipe section inlet 1-4 is arranged corresponding to the primary air first pipe section outlet 1-10, and the middle heat exchange pipe group 4 is arranged between the secondary air second pipe section inlet 1-3, the primary air second pipe section inlet 1-4, the secondary air first pipe section outlet 1-9 and the primary air first pipe section outlet 1-10; the primary air second pipe section outlet 1-5 is arranged corresponding to the primary hot air outlet 1-11, the secondary air second pipe section outlet 1-6 is arranged corresponding to the secondary hot air outlet 1-12, and the upper heat exchange pipe group 4 is arranged between the primary air second pipe section outlet 1-5, the secondary air second pipe section outlet 1-6, the primary hot air outlet 1-11 and the secondary hot air outlet 1-12;
the lower end of the primary air first pipe section is connected with the inlet 1-7 of the primary air first pipe section, the upper end of the primary air first pipe section is connected with the outlet 1-10 of the primary air first pipe section, the lower end of the primary air second pipe section is connected with the inlet 1-4 of the primary air second pipe section, and the upper end of the primary air second pipe section is connected with the outlet 1-5 of the primary air second pipe section; the lower end of the second air first pipe section is connected with an inlet 1-8 of the second air first pipe section, the upper end of the second air first pipe section is connected with an outlet 1-9 of the second air first pipe section, the lower end of the second air second pipe section is connected with an inlet 1-3 of the second air second pipe section, and the upper end of the second air second pipe section is connected with an outlet 1-6 of the second air second pipe section.
Other compositions and connection modes are the same as in the first embodiment.
Seventh embodiment: the present embodiment will be described with reference to fig. 1 to 7, in which an integral communication box is fixedly connected between a primary air first pipe section and a secondary air first pipe section and between a primary air second pipe section and a secondary air second pipe section, and a lifting lug 12 is fixedly connected to the outside of the integral communication box. Other compositions and connection modes are the same as those of the sixth embodiment.
The lifting lug 12 is welded on the integrated communicating box, so that the lifting in the production, manufacture and installation processes is facilitated.
Eighth embodiment: in the heat exchange tube group 4 in the lower portion of the present embodiment, a sleeve 10 is fitted over the outer side of the end portion of the tube 7 adjacent to the primary cold air inlet 1-1 and the secondary cold air inlet 1-2, as described with reference to fig. 1 to 7. Other compositions and connection modes are the same as those of the sixth embodiment.
The sleeve 10 welded to the pipe 7 with a length of 500 mm can prevent low-temperature corrosion caused by cold air entering the pipe 7 and can delay the time for replacing the pipe due to corrosion.
Detailed description nine: in the heat exchange tube group 4 of the lower portion of the present embodiment, the ends of the tubes 7 adjacent to the primary cold air inlet 1-1 and the secondary cold air inlet 1-2 are inserted into the steel plate 11, and the steel plate 11 is disposed outside the flue gas duct 1, as described with reference to fig. 1 to 7. Other compositions and connection modes are the same as those of the sixth embodiment.
The thickness of the steel plate 11 welded at the end part of the lower pipe of the pipe 7 is 2mm, so that the heat insulation material at the pipe end can be prevented from falling off, and the heat insulation of the pipe end is ensured.
Detailed description ten: in the heat exchange tube group 4 of the lower portion of the present embodiment, the material of the tubes 7 is weather-resistant steel, which will be described with reference to fig. 1 to 7. Other compositions and connection modes are the same as those of the sixth embodiment.
The final stage of the pipe 7 adopts weather-resistant steel (containing corrosion-resistant elements) to reduce corrosion of the lower stage caused by inflow of cold air, reduce the replacement frequency of the pipe and save the cost in the operation process; and the upper level adopts the common material pipe material, so that the production and manufacturing cost is saved.
Although the utility model herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present utility model. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present utility model as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
Claims (10)
1. A horizontal air preheater for a coal-fired circulating fluidized bed boiler is characterized in that: it includes flue gas pipeline (1), primary air pipeline (2), overgrate air pipeline (3), heat transfer nest of tubes (4), a plurality of abrasionproof protects tile (5) and a plurality of shock absorber plate (6), vertical setting of flue gas pipeline (1), heat transfer nest of tubes (4) horizontal cartridge is on the lateral wall of flue gas pipeline (1), primary air pipeline (2) and overgrate air pipeline (3) communicate with heat transfer nest of tubes (4) respectively, heat transfer nest of tubes (4) are including being many pipes (7) that the matrix arrangement set up, the upper portion of the outer lateral wall of tube (7) of the top is all fixedly connected with abrasionproof protects tile (5), a plurality of shock absorber plate (6) vertical interval sets up, every shock absorber plate (6) rigid coupling is in one side of a row of pipe (7) respectively.
2. A horizontal air preheater for a coal-fired circulating fluidized bed boiler as set forth in claim 1, wherein: the anti-abrasion protection tile (5) comprises a plurality of curved surface protection tiles (5-1), a plurality of jackets (5-2) and a plurality of straight protection tiles (5-3), wherein the curved surface protection tiles (5-1) are uniformly distributed on the upper portion of the pipe (7) along the length direction, one jacket (5-2) is arranged between every two adjacent curved surface protection tiles (5-1), the jackets (5-2) are sleeved on the outer side wall of the end portion of the curved surface protection tile (5-1), and the lower ends of the curved surface protection tiles (5-1) are vertically fixedly connected with the straight protection tiles (5-3).
3. A horizontal air preheater for a coal-fired circulating fluidized bed boiler as set forth in claim 2, wherein: a group of lifting hooks (6-1) are fixedly connected to the upper side and the lower side of the shockproof plate (6), the lifting hooks (6-1) on the upper side are fixedly connected to the outer side of the wear-resistant protection tile (5), and the lifting hooks (6-1) on the lower side are fixedly connected to the outer side of the lowest calandria (7).
4. A horizontal air preheater for a coal-fired circulating fluidized bed boiler as set forth in claim 1, wherein: the upper end of the flue gas pipeline (1) is provided with an inlet flue (8), two sides of the inlet flue (8) are inclined planes which incline outwards from bottom to top, and an included angle between each inclined plane and a horizontal plane is 38 degrees.
5. The horizontal air preheater for a coal-fired circulating fluidized bed boiler of claim 4, wherein: a metal expansion joint (9) is arranged between the upper end of the flue gas pipeline (1) and the inlet flue (8).
6. A horizontal air preheater for a coal-fired circulating fluidized bed boiler as set forth in claim 1, wherein: the heat exchange tube group (4) comprises three groups of heat exchange tube groups (4) which are sequentially arranged from bottom to top, the primary air pipeline (2) comprises a primary air first tube section and a primary air second tube section, and the secondary air pipeline (3) comprises a secondary air first tube section and a secondary air second tube section;
a primary cold air inlet (1-1), a secondary cold air inlet (1-2), a secondary air second pipe section inlet (1-3), a primary air second pipe section inlet (1-4), a primary air second pipe section outlet (1-5) and a secondary air second pipe section outlet (1-6) are sequentially arranged on the side wall of one side of the flue gas pipeline (1) from bottom to top, and a primary air first pipe section inlet (1-7), a secondary air first pipe section inlet (1-8), a secondary air first pipe section outlet (1-9), a primary air first pipe section outlet (1-10), a primary hot air outlet (1-11) and a secondary hot air outlet (1-12) are sequentially arranged on the side wall of the other side of the flue gas pipeline (1) from bottom to top; the primary cold air inlet (1-1) is arranged corresponding to the primary air first pipe section inlet (1-7), the secondary cold air inlet (1-2) is arranged corresponding to the secondary air first pipe section inlet (1-8), and the lower heat exchange pipe group (4) is arranged between the primary cold air inlet (1-1) and the secondary cold air inlet (1-2) and the primary air first pipe section inlet (1-7) and between the secondary air first pipe section inlet (1-8); the secondary air second pipe section inlet (1-3) is arranged corresponding to the secondary air first pipe section outlet (1-9), the primary air second pipe section inlet (1-4) is arranged corresponding to the primary air first pipe section outlet (1-10), and the middle heat exchange pipe group (4) is arranged between the secondary air second pipe section inlet (1-3), the primary air second pipe section inlet (1-4) and the secondary air first pipe section outlet (1-9) and between the primary air first pipe section outlet (1-10); the primary air second pipe section outlet (1-5) is arranged corresponding to the primary hot air outlet (1-11), the secondary air second pipe section outlet (1-6) is arranged corresponding to the secondary hot air outlet (1-12), and the upper heat exchange pipe group (4) is arranged between the primary air second pipe section outlet (1-5), the secondary air second pipe section outlet (1-6) and the primary hot air outlet (1-11) and the secondary hot air outlet (1-12);
the lower end of the primary air first pipe section is connected with a primary air first pipe section inlet (1-7), the upper end of the primary air first pipe section is connected with a primary air first pipe section outlet (1-10), the lower end of the primary air second pipe section is connected with a primary air second pipe section inlet (1-4), and the upper end of the primary air second pipe section is connected with a primary air second pipe section outlet (1-5); the lower end of the secondary air first pipe section is connected with an inlet (1-8) of the secondary air first pipe section, the upper end of the secondary air first pipe section is connected with an outlet (1-9) of the secondary air first pipe section, the lower end of the secondary air second pipe section is connected with an inlet (1-3) of the secondary air second pipe section, and the upper end of the secondary air second pipe section is connected with an outlet (1-6) of the secondary air second pipe section.
7. The horizontal air preheater for a coal-fired circulating fluidized bed boiler of claim 6, wherein: the primary air first pipe section and the secondary air first pipe section and the primary air second pipe section and the secondary air second pipe section are fixedly connected into an integrated communication box, and lifting lugs (12) are fixedly connected to the outer side of the integrated communication box.
8. The horizontal air preheater for a coal-fired circulating fluidized bed boiler of claim 6, wherein: in the lower heat exchange tube group (4), a sleeve (10) is sleeved outside the end part of the tube (7) adjacent to the primary cold air inlet (1-1) and the secondary cold air inlet (1-2).
9. The horizontal air preheater for a coal-fired circulating fluidized bed boiler of claim 6, wherein: in the lower heat exchange tube group (4), the tail ends of the tubes (7) adjacent to the primary cold air inlet (1-1) and the secondary cold air inlet (1-2) are inserted on a steel plate (11), and the steel plate (11) is arranged on the outer side of the flue gas pipeline (1).
10. The horizontal air preheater for a coal-fired circulating fluidized bed boiler of claim 6, wherein: in the lower heat exchange tube group (4), the material of the tube (7) is weather-proof steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320201477.0U CN219640240U (en) | 2023-02-13 | 2023-02-13 | Horizontal air preheater for coal-fired circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320201477.0U CN219640240U (en) | 2023-02-13 | 2023-02-13 | Horizontal air preheater for coal-fired circulating fluidized bed boiler |
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| Publication Number | Publication Date |
|---|---|
| CN219640240U true CN219640240U (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320201477.0U Active CN219640240U (en) | 2023-02-13 | 2023-02-13 | Horizontal air preheater for coal-fired circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219640240U (en) |
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- 2023-02-13 CN CN202320201477.0U patent/CN219640240U/en active Active
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