CN114166041A - High-efficiency and high-performance steam and flue gas heater - Google Patents
High-efficiency and high-performance steam and flue gas heater Download PDFInfo
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- CN114166041A CN114166041A CN202111305008.5A CN202111305008A CN114166041A CN 114166041 A CN114166041 A CN 114166041A CN 202111305008 A CN202111305008 A CN 202111305008A CN 114166041 A CN114166041 A CN 114166041A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 239000003546 flue gas Substances 0.000 title claims abstract description 77
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000009826 distribution Methods 0.000 claims description 125
- 239000000779 smoke Substances 0.000 claims description 23
- 230000007704 transition Effects 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 17
- 239000006185 dispersion Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 21
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract 1
- 230000008602 contraction Effects 0.000 description 9
- 238000012546 transfer Methods 0.000 description 9
- 230000008439 repair process Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a high-efficiency high-performance steam flue gas heater, which comprises a heater body, wherein a heat exchange cavity is arranged in the heater body, a plurality of heat exchange tubes are arranged in the heat exchange cavity, a movable tube plate and a fixed tube plate are respectively arranged at two ends of the heat exchange cavity, the fixed tube plate is fixedly connected with the inner wall of the heat exchange cavity, and the movable tube plate is connected with the inner wall of the heat exchange cavity through a first telescopic structure; the heat exchange tube is S-shaped in the heating cavity and is formed by connecting a first transverse tube section, a first U-shaped tube section, a second transverse tube section, a second U-shaped tube section and a third transverse tube section end to end, and the first transverse tube section and the fixed tube plate and the third transverse tube section and the movable tube plate are connected through second telescopic structures respectively; two second extending structures and a first extending structure cooperate, can adjust the breathing of three horizontal pipe section respectively, improve heat exchange tube mounting structure's stability. The invention can avoid the negative effects caused by the expansion and shrinkage of the heat exchange tube, improve the heat exchange efficiency and facilitate the maintenance.
Description
Technical Field
The invention relates to the technical field of heat exchangers, in particular to a high-efficiency high-performance steam flue gas heater.
Background
A flue gas treatment system for waste incineration power generation needs to use an SGH steam flue gas heater to heat flue gas. The heat exchange tube is one of the important parts in the steam flue gas heater. When the temperature of the medium inside and outside the heat exchange tube changes, the heat exchange tube may expand and contract, and if the heat exchange tube is directly fixed inside the steam flue gas heater, the mounting structure of the heat exchange tube may be damaged when the expansion and contraction phenomenon occurs, and needs to be improved.
In order to improve the heat exchange efficiency of the heat exchange tube, heat exchange fins are usually added on the heat exchange tube to increase the heat exchange area, so that the heat exchange efficiency is improved. However, the conventional heat exchange fins have poor turbulence effect, which results in poor effect of improving the heat exchange efficiency of the heat exchange pipe and needs to be improved.
The distributing pipe can distribute steam to each heat exchange pipe, and steam in the heat exchange pipes exchanges heat with the flue gas again to the heating flue gas. The distribution effect of current distributing pipe is not good, is difficult to evenly distribute steam to each heat exchange tube in, leads to the steam volume in each heat exchange tube to be different, influences heat exchange efficiency, awaits improving.
The steam flue gas heater needs to maintain and repair the inside of the heat exchange cavity in the using process, but the tightness of a maintenance structure on the shell of the existing heater is poor, and the steam flue gas heater is difficult to maintain and repair a part in the heat exchange cavity according to needs and needs to be improved.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the high-efficiency and high-performance steam flue gas heater, which can avoid the negative effects caused by the expansion and shrinkage of the heat exchange tube, improve the heat exchange efficiency and is convenient to overhaul.
The technical scheme is as follows: in order to achieve the purpose, the high-efficiency high-performance steam flue gas heater comprises a heater body, wherein a heat exchange cavity is arranged in the heater body, a plurality of heat exchange tubes are arranged in the heat exchange cavity, a movable tube plate and a fixed tube plate are respectively arranged at two ends of the heat exchange cavity, the fixed tube plate is fixedly connected with the inner wall of the heat exchange cavity, and the movable tube plate is connected with the inner wall of the heat exchange cavity through a first telescopic structure; the heat exchange tube is S-shaped in the heating cavity and is formed by connecting a first transverse tube section, a first U-shaped tube section, a second transverse tube section, a second U-shaped tube section and a third transverse tube section end to end, and the first transverse tube section and the fixed tube plate and the third transverse tube section and the movable tube plate are connected through second telescopic structures respectively; the first telescopic structure comprises two first guide rails fixedly arranged on the inner wall of the heat exchange cavity, and a first telescopic groove is formed in each first guide rail; side plates are vertically arranged on two sides of the movable tube plate, the side plates are in sliding sealing fit with the first telescopic grooves, and two sides of each side plate are elastically connected with two side walls of the first telescopic grooves through two first elastic strips; the second telescopic structure comprises secondary movable plates, and the first horizontal pipe section and the third horizontal pipe section are respectively and fixedly connected with the corresponding secondary movable plates; the movable tube plate and the fixed tube plate are respectively provided with a second guide rail, a second telescopic groove is formed in the second guide rail, the secondary movable plate is in horizontal sliding fit with the second telescopic groove, and two sides of the secondary movable plate are elastically connected with two side walls of the second telescopic groove through two second elastic strips.
Furthermore, a plurality of heat exchange tubes are arranged in a matrix shape in the heat exchange cavity, the first guide rail is vertically arranged, the second guide rail is transversely arranged, and the end parts of the plurality of heat exchange tubes in the same transverse row are fixedly connected with the same secondary movable plate; two ends of the heater body are respectively provided with a distribution cavity, and the second telescopic structure is arranged on one side of the movable tube plate and the fixed tube plate facing the distribution cavity; the two distribution cavities are respectively provided with a water inlet distribution pipe and a water outlet distribution pipe, and two ends of the heat exchange pipe are respectively connected with the water inlet distribution pipe and the water outlet distribution pipe; the top and the bottom of the heat exchange cavity are respectively communicated with a flue gas inlet pipe and a flue gas outlet pipe.
Furthermore, a plurality of annular fins are fixedly arranged on the heat exchange tube, and each annular fin is provided with at least one inverted U-shaped fin; the inverted U-shaped fin consists of two side pieces and a top piece connected with the two side pieces, and the two side pieces are respectively arranged on two sides of the corresponding annular fin in a spanning mode; the outer contour of the annular fin is oval; two inverted U-shaped fins are arranged on each annular fin, and the two inverted U-shaped fins are respectively arranged at two ends of a short shaft of the oval outer contour of each annular fin.
Furthermore, a plurality of annular fins on the heat exchange tube are arranged at equal intervals, the outer contours of the annular fins are the same in shape, the long axis directions of the outer contours are consistent, and flue gas flows along the long axis direction of the oval outer contours of the annular fins; the top plate of the inverted U-shaped fin is gradually inclined to one side close to the heat exchange tube along the flow direction of the smoke; the annular fin is vertical to the heat exchange tube; the two side plates of the inverted U-shaped fin are parallel to each other, and the two side plates of the inverted U-shaped fin and the annular fin are inclined at an angle; the smoke guide channel formed by one side piece of the inverted U-shaped fin and the annular fin is widened from narrow to wide along the smoke flowing direction, and the smoke guide channel formed by the other side piece of the inverted U-shaped fin and the annular fin is narrowed from wide to narrow along the smoke flowing direction.
Further, the water inlet distribution pipe comprises a steam main inlet pipe, a first annular pipe, a steam branch inlet pipe and a second annular pipe; the outlet end of the steam main inlet pipe is communicated with a first annular pipe, and a first distribution pipe section is arranged on the first annular pipe; the first distribution pipe section is provided with a plurality of first distribution holes and is communicated with the first transition cavity through the first distribution holes; the first transition cavity is communicated with the inlet ends of the plurality of steam branch inlet pipes; the outlet end of the steam inlet pipe is communicated with a second annular pipe, and a second distribution pipe section is arranged on the second annular pipe; the second distribution pipe section is provided with a plurality of second distribution holes and is communicated with the second transition cavity through the second distribution holes; the second transition cavity is communicated with the plurality of heat exchange tubes.
Further, a first sleeve is sleeved outside the first distribution pipe section, and a first transition cavity is formed between the first sleeve and the first distribution pipe section; a second sleeve is sleeved outside the second distribution pipe section, and a second transition cavity is formed between the second sleeve and the second distribution pipe section; the first annular pipe is formed by connecting two straight pipe sections and two U-shaped pipe sections end to end, one straight pipe section on the first annular pipe is a first distribution pipe section, and the center of the other straight pipe section on the first annular pipe is connected with the steam main inlet pipe; the second annular pipe is formed by connecting two straight pipe sections and two U-shaped pipe sections end to end, one straight pipe section on the second annular pipe is a second distribution pipe section, and the center of the other straight pipe section on the second annular pipe is connected with the steam branch pipe; the plurality of first distribution holes are arranged on one side, facing the steam distribution pipe, of the first distribution pipe section; the plurality of second distribution holes are arranged on the second distribution pipe section and face one side of the plurality of heat exchange pipes; the first dispensing orifice and the second dispensing orifice are each flared tapered orifices.
Further, the bottom of the heat exchange cavity is communicated with the flue gas inlet pipe through a flue gas dispersion structure; the smoke dispersing structure comprises a plurality of air inlet channels and a plurality of flow dividing channels; the gas outlet of the flue gas inlet pipe is uniformly divided into a plurality of flow dividing ports by a plurality of partition plates; the upper ends of the plurality of air inlet channels are communicated with the interior of the heat exchange cavity, the lower ends of the plurality of air inlet channels are communicated with the upper ends of the plurality of shunting channels in a one-to-one correspondence manner, and the lower ends of the plurality of shunting channels are communicated with the plurality of shunting ports in a one-to-one correspondence manner; an upper uniform flow plate and a lower uniform flow plate are arranged at the intersection of the air inlet channel and the flow dividing channel at intervals; a plurality of upper vent holes are formed in the upper uniform flow plate, and the upper vent holes are conical holes with upward tips; a plurality of lower vent holes are formed in the lower uniform flow plate, and the lower vent holes are conical holes with downward tips; the projections of the upper vent holes and the lower vent holes in the vertical direction are mutually staggered; the cross sections of the upper vent hole and the lower vent hole are both regular hexagons; the upper air holes and the lower air holes are respectively arranged in a honeycomb shape.
Furthermore, the air inlet channel is a vertical channel, the upper end in the air inlet channel is provided with a plurality of flow distribution plates, the flow distribution plates are vertical plate bodies, and the flow distribution plates are transversely arranged at equal intervals; a plurality of air inlets communicated with the air inlet channels are formed in the bottom of the heat exchange cavity, and a support pore plate for supporting the heat exchange tube in an auxiliary mode is arranged between every two adjacent air inlets; the top of the heat exchange cavity is provided with a plurality of air outlets communicated with a plurality of air outlet channels, and the upper ends of the air outlet channels are communicated with the flue gas outlet pipe; the plurality of air outlets are vertically opposite to the plurality of air inlets.
Furthermore, an end part access hole is formed in one side, far away from the heat exchange cavity, of the distribution cavity, and an end part access door is arranged on the end part access hole; a plurality of side access holes are arranged on one side of the heat exchange cavity, and side access doors are arranged on the side access holes; the left side and the right side of the side access hole are respectively provided with a support plate, one side of the two support plates close to each other is respectively provided with a top pressure plate, and the support plate and the top pressure plate on the same side are combined into an L shape; the top pressure plate is provided with a plurality of top pressure screw holes, top pressure bolts are arranged in the top pressure screw holes, and the end parts of the top pressure bolts correspondingly top and press the edges of the left side and the right side of the side access door; the upper side and the lower side of the side access hole are respectively provided with a plurality of fastening screw holes, and the upper end and the lower end of the side access door are respectively provided with a plurality of through holes; the fastening bolt penetrates through the through hole and is matched with the corresponding fastening screw hole so as to fix the upper end and the lower end of the side access door.
Furthermore, an annular groove is formed in the periphery of the side access hole, and an annular sealing rubber ring is arranged in the annular groove; the inner wall of the side access door is provided with an annular block, and the middle part of the annular block is provided with an annular inner sealing groove; the annular groove is correspondingly matched with the annular block, and the sealing rubber ring is correspondingly matched with the inner sealing groove.
Has the advantages that: the invention discloses a high-efficiency high-performance steam flue gas heater, which has the following beneficial effects:
1) the heat exchange tube in the heater is S-shaped, so that the stroke of steam in the heat exchange tube in the heat exchange cavity is prolonged, and the steam and the flue gas can be subjected to sufficient heat exchange;
2) a movable tube plate and a fixed tube plate are arranged in the heat exchange cavity, and the movable tube plate is connected with the inner wall of the heat exchange cavity through a first telescopic structure; the S-shaped heat exchange tube is formed by connecting a first transverse tube section, a first U-shaped tube section, a second transverse tube section, a second U-shaped tube section and a third transverse tube section end to end, and the first transverse tube section and the fixed tube plate and the third transverse tube section and the movable tube plate are connected through second telescopic structures respectively; the first telescopic structure and the second telescopic structure are matched with each other to deal with the expansion and contraction of the heat exchange tube;
3) the heat exchange tube is provided with the annular fin and the inverted U-shaped fin, so that the outer surface area of the heat exchange tube is increased, and the heat exchange efficiency is improved; two flue gas guide channels are formed between the annular fins and the inverted U-shaped fins, wherein one flue gas guide channel is narrowed from wide to narrow along the flue gas flowing direction, and the other flue gas guide channel is widened from narrow to wide along the flue gas flowing direction; the two flue gas guide channels are matched with each other, so that a good flow disturbing effect is achieved, and the heat exchange efficiency of the heat exchange tube is further improved;
4) the water inlet distribution pipe can uniformly distribute the steam into each heat exchange pipe, so that the heat exchange efficiency is improved;
5) the smoke dispersing structure is arranged, so that smoke can uniformly and dispersedly pass through the heat exchange cavity, the smoke is more uniformly contacted with the heat exchange tube, and the heat exchange efficiency is improved;
6) the end part access door is arranged, so that the distribution cavities on two sides can be conveniently overhauled; be provided with a plurality of side access doors, can overhaul certain part in the heat transfer chamber as required, and need not open one side in heat transfer chamber completely, it is more convenient to operate, and the leakproofness of side access door is good, is difficult for taking place the flue gas and leaks.
Drawings
FIG. 1 is a schematic view of the external structure of a heater body;
FIG. 2 is a schematic plan view of the internal structure of the heater body;
FIG. 3 is a schematic view of the inlet and outlet distribution pipes;
FIG. 4 is a schematic diagram of the internal structure of the heat exchange chamber;
FIG. 5 is a top view of a heat exchange chamber;
FIG. 6 is an enlarged view of area C of FIG. 5;
FIG. 7 is a schematic structural view of a first guide rail;
FIG. 8 is a schematic view of a movable tube sheet;
FIG. 9 is a schematic view of the construction of a second rail on the fixed tube sheet;
FIG. 10 is a schematic structural view of a heat exchange tube;
FIG. 11 is an enlarged view of area D of FIG. 10;
FIG. 12 is an enlarged view of area E of FIG. 10;
FIG. 13 is a schematic view of the structure of the ring fin and the inverted U-shaped fin;
FIG. 14 is a side view of an annular fin and an inverted U-shaped fin;
FIG. 15 is a front view of an annular fin and an inverted U-shaped fin;
FIG. 16 is a schematic structural view of a flue gas diversion channel;
FIG. 17 is a schematic view of the entire inlet distribution pipe;
FIG. 18 is an exploded view of the inlet distribution pipe;
FIG. 19 is a schematic plan view of the inlet distribution pipe;
FIG. 20 is an enlarged view of area A of FIG. 19;
FIG. 21 is an enlarged view of area B of FIG. 19;
FIG. 22 is a schematic view of a smoke dispersion structure;
FIG. 23 is a bottom view of the upper and lower flow equalization plates;
FIG. 24 is a top view of the upper and lower flow distribution plates;
FIG. 25 is a plan view of the upper and lower flow distribution plates when they are overlapped;
FIG. 26 is a schematic view of the installation of an end access door and a side access door;
FIG. 27 is a schematic side view of the access opening;
FIG. 28 is a schematic view of a side access door construction.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The heater comprises a heater body 501 as shown in fig. 1 to 28, a heat exchange cavity 502 is arranged in the heater body 501, a plurality of heat exchange tubes 503 are arranged in the heat exchange cavity 502, steam flows in the heat exchange tubes 503, and flue gas flows outside the heat exchange tubes 503. Two ends of the heat exchange cavity 502 are respectively provided with a movable tube plate 504 and a fixed tube plate 505 for supporting the heat exchange tube 503, the fixed tube plate 505 is fixedly connected with the inner wall of the heat exchange cavity 502, and the movable tube plate 504 is connected with the inner wall of the heat exchange cavity 502 through a first telescopic structure.
The heat exchange tube 503 is S-shaped in the heating cavity, the heat exchange tube 503 is formed by connecting a first horizontal tube section 506, a first U-shaped tube section 507, a second horizontal tube section 508, a second U-shaped tube section 509 and a third horizontal tube section 510 end to end, wherein the first horizontal tube section 506, the second horizontal tube section 508 and the third horizontal tube section 510 are parallel to each other, one end of the first horizontal tube section 506, which is far away from the first U-shaped tube section 507, is connected with the fixed tube plate 505, and one end of the third horizontal tube section 210, which is far away from the second U-shaped tube section 509, is connected with the movable tube plate 504. The first horizontal tube section 506 and the fixed tube plate 505 and the third horizontal tube section 510 and the movable tube plate 504 are connected through a second telescopic structure respectively.
The heat exchange tube 503 is S-shaped, which can increase the formation of steam in the heat exchange cavity 502, so that the steam and the flue gas can fully exchange heat, and when the steam flows along the S-shaped heat exchange tube 503, due to the heat exchange effect, the steam temperatures in the first horizontal tube section 506, the second horizontal tube section 508 and the third horizontal tube section 510 are different, so that the expansion and contraction amounts of the three horizontal tube sections are different when expansion and contraction occur, and a single heat exchange tube 503 is provided with a first telescopic structure and two second telescopic structures, which can respectively adjust the expansion and contraction of the three horizontal tube sections, thereby preventing the mounting structure of the heat exchange tube 503 from being damaged due to the expansion and contraction phenomenon, and improving the stability of the mounting structure of the heat exchange tube 503.
The first telescopic structure comprises two first guide rails 511 fixedly arranged on the inner wall of the heat exchange cavity 502, the first guide rails 511 are formed by two L-shaped plate bodies which are oppositely arranged, and a first telescopic groove 512 is arranged in each first guide rail 511. The upper side and the lower side of activity tube sheet 504 and the inner wall sliding seal cooperation of heat transfer chamber 502, the both sides of activity tube sheet 504 are provided with curb plate 513 perpendicularly, curb plate 513 with first flexible groove 512 sliding seal cooperation, and the both sides of curb plate 513 through two first elastic strip 514 with the both sides wall elastic connection of first flexible groove 512. As the second transverse segment 508 expands and contracts, the two first resilient bars 514 deform to adjust the position of the movable tube sheet 504 within the heat exchange chamber 502 to account for the amount of expansion and contraction of the second transverse segment 508.
The second telescopic structure comprises a secondary movable plate 515, the first horizontal pipe section 506 and the third horizontal pipe section 510 are respectively and fixedly connected with the corresponding secondary movable plate 515, in addition, one end of the first horizontal pipe section 506 fixedly connected with the secondary movable plate 515 is in sliding sealing fit with a pipe hole on the fixed pipe plate 505, the third horizontal pipe section 510 is in sliding sealing fit with one end of the secondary movable plate 515 fixedly connected with the pipe hole on the movable pipe plate 504, and two ends of the first U-shaped pipe section 507 and the second U-shaped pipe section 509 are respectively fixed on the movable pipe plate 504 and the fixed pipe plate 505.
The movable tube plate 504 and the fixed tube plate 505 are respectively provided with a second guide rail 516, the second guide rail 516 is transversely arranged and is composed of two opposite L-shaped plate bodies, a second telescopic groove 517 is arranged on the second guide rail 516, the secondary movable plate 515 is in horizontal sliding fit with the second telescopic groove 517, and two sides of the secondary movable plate 515 are elastically connected with two side walls of the second telescopic groove 517 through two second elastic strips 518. When the first horizontal tube section 506 expands and contracts, the second telescopic structure on the movable tube plate 504 correspondingly telescopically adjusts; when the third horizontal tube section 510 expands and contracts, the second telescopic structure on the fixed tube plate 505 correspondingly telescopically adjusts.
The plurality of heat exchange tubes 503 are arranged in the heat exchange cavity 502 in a matrix shape, the first guide rails 511 are vertically arranged, the second guide rails 516 are transversely arranged, the end parts of the plurality of heat exchange tubes 503 in the same transverse row are fixedly connected with the same secondary movable plate 515, and the expansion and contraction amounts of the transverse tube sections at the same horizontal height are the same, so that the structure is more reasonable.
Two ends of the heater body 501 are respectively provided with a distribution cavity 519, that is, the movable tube plate 504 and the fixed tube plate 505 are provided with a distribution cavity 519 on the side far away from the heat exchange cavity 502. The second telescopic structure is arranged on one side of the movable tube plate 504 and the fixed tube plate 505 facing the distribution cavity 519, so that the influence of smoke on the second telescopic structure can be avoided, and the service life of the second telescopic structure is prolonged.
A water inlet distribution pipe 520 and a water outlet distribution pipe 521 are respectively arranged in the two distribution cavities 519, and two ends of the heat exchange pipe 503 are respectively connected with the water inlet distribution pipe 520 and the water outlet distribution pipe 521 so as to circulate steam, and a part of the water inlet distribution pipe 520 and a part of the water outlet distribution pipe 521 are communicated with the outside. The top and the bottom of the heat exchange cavity 502 are respectively communicated with a flue gas inlet pipe 522 and a flue gas outlet pipe 523 to circulate flue gas. The outer walls of both sides of the heater body 501 are provided with supports 120 to support the heater body 501.
A plurality of annular fins 102 are fixedly arranged on the heat exchange tube 503, and the annular fins 102 are arranged on the horizontal tube section of the heat exchange tube 503. Each annular fin 102 is provided with at least one inverted U-shaped fin 103. The inverted U-shaped fin 103 is composed of two side sheets 104 and a top sheet 105 connecting the two side sheets 104, and the two side sheets 104 are respectively arranged on both sides of the corresponding annular fin 102 in a straddling manner. The cooperation of annular fin 104 and inverted U-shaped fin 103 can increase heat transfer area, also has better vortex effect, can promote heat exchange efficiency of heat exchange tube 503. The outer contour of the ring-shaped fin 102 is elliptical. Two inverted U-shaped fins 103 are arranged on each annular fin 102, and the two inverted U-shaped fins 103 are respectively arranged at two ends of a short shaft of the oval outer contour of the annular fin 102.
The plurality of annular fins 102 on the heat exchange tube 503 are arranged at equal intervals, the outer contours of the plurality of annular fins 102 have the same shape and the long axis direction of the outer contours is the same, and the flue gas flows along the long axis direction of the oval outer contours of the annular fins 102. The top plate 105 of the inverted U-shaped fin 103 gradually inclines towards one side close to the heat exchange tube 503 along the flowing direction of the smoke, and when the smoke passes through the inner side of the inverted U-shaped fin 103, the flowing direction of the smoke is changed under the action of the inclined top plate 105, so that the turbulent flow effect of the inverted U-shaped fin 103 is improved.
The annular fin 102 is perpendicular to the heat exchange tube 503. The two side pieces 104 of the inverted U-shaped fin 103 are parallel to each other, and the two side pieces 104 of the inverted U-shaped fin 103 are inclined at an angle to the annular fin 102. The flue gas guide channel 106 formed by one side plate 104 on the inverted U-shaped fin 103 and the annular fin 102 is widened from narrow to wide along the flue gas flowing direction, the flue gas guide channel 106 formed by the other side plate 104 and the annular fin 102 is narrowed from wide to narrow along the flue gas flowing direction, the wide ends and the narrow ends of the two flue gas guide channels 106 are different, and the two flue gas guide channels 106 have difference on the guide effect of the flue gas, so that the turbulent flow effect of the inverted U-shaped fin 103 is improved, and the heat exchange efficiency is improved.
The water inlet distribution pipe 520 comprises a steam main inlet pipe 201, a first annular pipe 202, a steam branch inlet pipe 206 and a second annular pipe 207; steam enters from a steam main inlet pipe 201, the outlet end of the steam main inlet pipe 201 is communicated with a first annular pipe 202, and a first distribution pipe section 203 is arranged on the first annular pipe 202; the first distribution pipe section 203 is provided with a plurality of first distribution holes 204 and is communicated with a first transition chamber 205 through the plurality of first distribution holes 204, and the first transition chamber 205 is communicated with the inlet end of a plurality of steam inlet pipes 206.
The outlet end of the steam inlet pipe 206 is communicated with a second annular pipe 207, and a second distribution pipe section 208 is arranged on the second annular pipe 207; the second distribution pipe section 208 is provided with a plurality of second distribution holes 209 and is communicated with a second transition cavity 210 through the plurality of second distribution holes 209; the second transition cavity 210 is in communication with a plurality of heat exchange tubes 503.
During operation, the first distribution holes 204 and the second distribution holes 209 have an even distribution function, so that steam can be evenly distributed into the transition cavity, and then the transition cavity evenly distributes the steam into each steam inlet pipe 206 and each heat exchange pipe 503, thereby improving heat exchange efficiency.
The first sleeve 212 is sleeved outside the first distribution pipe section 203, and a first transition cavity 205 is formed between the first sleeve 212 and the first distribution pipe section 203. The second distribution pipe section 208 is externally sleeved with a second sleeve 213, and a second transition chamber 210 is arranged between the second sleeve 213 and the second distribution pipe section 208.
The first annular pipe 202 is formed by connecting two straight pipe sections and two U-shaped pipe sections end to end, one of the straight pipe sections on the first annular pipe 202 is a first distribution pipe section 203, and the center of the other straight pipe section on the first annular pipe 202 is connected with the steam main inlet pipe 201, so that steam uniformly enters the first distribution pipe section 203 from two ends, and further the uniform distribution effect of the first distribution holes 204 is better.
The second annular pipe 207 is formed by connecting two straight pipe sections and two U-shaped pipe sections end to end, one of the straight pipe sections on the second annular pipe 207 is a second distribution pipe section 208, and the center of the other straight pipe section on the second annular pipe 207 is connected with the steam distribution pipe 206, so that steam uniformly enters the second distribution pipe section 208 from two ends, and further the uniform distribution effect of the plurality of second distribution holes 209 is better.
The cross sections of the first annular pipe 202, the second annular pipe 207, the first sleeve 212 and the second sleeve 213 are circular, the first transition cavity 205 and the second transition cavity 210 are annular, the structure setting is more reasonable, and the uniform flow distribution effect is better.
The first distribution holes 204 are disposed on the first distribution pipe section 203 toward the side of the steam inlet pipe 206 to reduce the impact of the steam on the inner wall of the first sleeve 212, so that the steam can more smoothly enter the steam inlet pipe 206 after leaving the first distribution holes 204. The plurality of second distribution holes 209 are formed in the second distribution pipe section 208 toward one side of the plurality of heat exchange pipes 503 to reduce the impact of the steam on the inner wall of the second sleeve 213, so that the steam can more smoothly enter the respective heat exchange pipes 503 after leaving the second distribution holes 209.
The first distribution holes 204 and the second distribution holes 209 are tapered holes with outward expansion, and the steam inlet end is a narrow-end and the steam outlet end is a wide-end. The first distribution holes 204 and the second distribution holes 209 have a dispersion function, and have a better effect of uniformly distributing steam.
The bottom of heat transfer chamber 502 is passed through flue gas dispersion structure and is advanced pipe 522 intercommunication with the flue gas, and the flue gas dispersion structure disperses the flue gas, makes the flue gas more evenly pass through heat transfer chamber 502, and is higher with the heat exchange efficiency of the steam in the heat exchange tube 503. The flue gas dispersion structure comprises a plurality of air inlet channels 306 and a plurality of flow dividing channels 307. The upper end air outlet 318 of the flue gas inlet pipe 522 is uniformly divided into a plurality of flow dividing ports 309 by a plurality of partition plates 308. The upper ends of the plurality of air inlet channels 306 are communicated with the interior of the heat exchange cavity 502, the lower ends of the plurality of air inlet channels 306 are communicated with the upper ends of the plurality of flow dividing channels 307 in a one-to-one correspondence manner, and the lower ends of the plurality of flow dividing channels 307 are communicated with the plurality of flow dividing ports 309 in a one-to-one correspondence manner; an upper uniform flow plate 310 and a lower uniform flow plate 311 are arranged at the intersection of the air inlet channel 306 and the flow dividing channel 307 at intervals.
The upper flow homogenizing plate 310 is provided with a plurality of upper vent holes 312, and the upper vent holes 312 are tapered holes with upward tips. The lower flow equalizing plate 311 is provided with a plurality of lower vent holes 313, and the lower vent holes 313 are tapered holes with downward tips. The projections of the upper vent holes 312 and the lower vent holes 313 in the vertical direction are staggered with each other. The smoke is dispersed into the plurality of upper vent holes 312 after passing through the lower vent holes 313, each upper vent hole 312 correspondingly receives the gas discharged from the plurality of lower vent holes 313, and the plurality of upper vent holes 313 and the plurality of lower vent holes 312 are matched with each other, so that the smoke can be dispersed.
The cross sections of the upper vent holes 312 and the lower vent holes 313 are regular hexagons, and the plurality of upper vent holes 312 and the plurality of lower vent holes 313 are respectively arranged in a honeycomb shape. There is an overlapping area of the projection of each upper vent hole 312 in the vertical direction with the projections of the three lower vent holes 313 in the vertical direction. The communication effect between the upper vent hole and the lower vent hole is better, and the dispersion effect on the smoke is also better.
The inlet channel 306 is vertical passageway, the inside upper end of inlet channel 306 is provided with a plurality of flow distribution plates 314, flow distribution plates 314 are vertical plate body, and the horizontal equidistance of a plurality of flow distribution plates 314 is arranged, and flow distribution plates 314 further shunts the flue gas, and flow distribution plates 314 have the guide effect, makes the vertical upward movement of flue gas to make flue gas and heat exchange tube 503 even heat transfer. The cross section of the flue gas inlet pipe 522 is smaller than that of the heat exchange cavity 502, and the branch passage 307 is narrowed and widened from bottom to top to connect the branch port 309 and the inlet passage 306.
The bottom of the heat exchange cavity 502 is provided with a plurality of air inlets 315 communicated with the plurality of air inlet channels 306, gaps are reserved between adjacent air inlets 315, the plurality of air inlets 315 can substantially cover the bottom of the heat exchange cavity 502, and a supporting pore plate 316 for assisting in supporting the heat exchange tube 503 is arranged between the adjacent air inlets 315, so that the structure is more reasonable. The top of the heat exchange cavity 502 is provided with a plurality of air outlets 318 communicated with a plurality of air outlet channels 317, the upper ends of the air outlet channels 317 are communicated with the flue gas outlet pipe 523, and the air outlets 318 are vertically opposite to the air inlets 315, so that the flue gas can approximately keep moving vertically and upwards in the heat exchange cavity 502, and the heat exchange efficiency is high.
One side that the distribution chamber 404 kept away from heat exchange chamber 502 is provided with tip access hole 410, be provided with tip access hole 411 on the tip access hole 410, tip access hole 411 is fixed through bolt and tip access hole 410, and tip access hole 411 conveniently overhauls in the distribution chamber 404.
One side of heat transfer chamber 502 is arranged and is provided with a plurality of side access holes 412, be provided with side access door 413 on the side access hole 412, the setting up of a plurality of side access holes 412 makes operating personnel can overhaul certain part in the heat transfer chamber 502 as required, and it is more convenient to operate. If only one large access door is arranged on one side of the heat exchange cavity 502, the large access door is cumbersome to disassemble, and if the access door on one side of the heat exchange cavity 502 is small, the areas in the heat exchange cavity 502 are difficult to overhaul.
The left side and the right side of the side access hole 412 are respectively provided with a support plate 414, one side of the two support plates 414 close to each other is respectively provided with a jacking plate 415, and the support plate 414 and the jacking plate 415 on the same side are combined to form an L shape. The jacking plate 415 is provided with a plurality of jacking screw holes 416, jacking bolts 417 are arranged in the jacking screw holes 416, and the end parts of the jacking bolts 417 correspondingly jack the edges of the left side and the right side of the side access door 413. A plurality of fastening screw holes 418 are respectively formed in the upper and lower sides of the side access opening 412, and a plurality of through holes 419 are respectively formed in the upper and lower ends of the side access door 413. Fastening bolts 420 pass through the through holes 419 and are engaged with the corresponding fastening screw holes 418 to fix upper and lower ends of the side access door 413. The top pressure bolt 417 and the fastening bolt 420 are matched with each other to fix the side access door 412, so that the side access door 412 can be tightly attached to the heater body 501, and the tightness is good.
An annular groove 421 is arranged on the periphery of the side access hole 412, and an annular sealing rubber ring 422 is arranged in the annular groove 421; the inner wall of the side access door 413 is provided with an annular block 423, and the middle part of the annular block 423 is provided with an annular inner sealing groove 424. The annular groove 421 corresponds the cooperation with the annular block 423, the sealing rubber ring 422 corresponds the cooperation with the interior seal groove 424, and the sealing effect of offside access hole 412 is good, prevents that the flue gas in the heat exchange chamber 502 from leaking.
The upper annular ring 425 and the lower annular ring 426 are respectively arranged on the edges of the upper side and the lower side of the heater body 501, and the plurality of fastening screw holes 418 on the upper side and the lower side of the side access hole 412 are respectively arranged on the upper annular ring 425 and the lower annular ring 426, so that the fastening screw holes 418 do not need to be arranged on the side wall of the heat exchange cavity 502. If fastening screw holes 418 are provided on the side wall of heat exchange chamber 502, the sealing property of heat exchange chamber 502 and the strength of the side wall of heat exchange chamber 502 are affected. The support orifice plate 316 is positioned between two adjacent side access holes 412, so that the structure is reasonable. At least two handles 428 are provided on the outside of each end access door 411 and each side access door 413 to facilitate removal of the end access door 411 and the side access door 413.
The invention improves the structures of the heat exchange pipe 503 and the water inlet distribution pipe 520, and is provided with the flue gas dispersion structure, so that the heat exchange efficiency of the flue gas and the steam is improved; by arranging the first telescopic structure and the second telescopic structure, the expansion and contraction phenomenon of the heat exchange tube 503 cannot damage the installation structure of the heat exchange tube 503; a plurality of side access doors 43 are provided outside the heater body 501, which facilitates maintenance and repair of the heater body 501.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a steam gas heater of high efficiency high performance which characterized in that: the heater comprises a heater body (501), wherein a heat exchange cavity (502) is arranged in the heater body (501), a plurality of heat exchange tubes (503) are arranged in the heat exchange cavity (502), a movable tube plate (504) and a fixed tube plate (505) are respectively arranged at two ends of the heat exchange cavity (502), the fixed tube plate (505) is fixedly connected with the inner wall of the heat exchange cavity (502), and the movable tube plate (504) is connected with the inner wall of the heat exchange cavity (502) through a first telescopic structure; the heat exchange tube (503) is S-shaped in the heating cavity and is formed by connecting a first transverse tube section (506), a first U-shaped tube section (507), a second transverse tube section (508), a second U-shaped tube section (509) and a third transverse tube section (510) end to end, and the first transverse tube section (506) and the fixed tube plate (505) and the third transverse tube section (510) and the movable tube plate (504) are connected through second telescopic structures respectively;
the first telescopic structure comprises two first guide rails (511) fixedly arranged on the inner wall of the heat exchange cavity (502), and a first telescopic groove (512) is arranged in each first guide rail (511); two sides of the movable tube plate (504) are vertically provided with side plates (513), the side plates (513) are in sliding sealing fit with the first telescopic grooves (512), and two sides of the side plates (513) are elastically connected with two side walls of the first telescopic grooves (512) through two first elastic strips (514);
the second telescopic structure comprises secondary movable plates (515), and the first horizontal pipe section (506) and the third horizontal pipe section (510) are respectively and fixedly connected with the corresponding secondary movable plates (515); the movable tube plate (504) and the fixed tube plate (505) are respectively provided with a second guide rail (516), the second guide rail (516) is provided with a second telescopic groove (517), the secondary movable plate (515) is in horizontal sliding fit with the second telescopic groove (517), and two sides of the secondary movable plate (515) are elastically connected with two side walls of the second telescopic groove (517) through two second elastic strips (518).
2. A high efficiency high performance steam flue gas heater according to claim 1 wherein: a plurality of heat exchange tubes (503) are arranged in a matrix in the heat exchange cavity (502), the first guide rail (511) is vertically arranged, the second guide rail (516) is transversely arranged, and the end parts of the heat exchange tubes (503) in the same transverse row are fixedly connected with the same secondary movable plate (515);
two ends of the heater body (501) are respectively provided with a distribution cavity (519), and the second telescopic structure is arranged on one side, facing the distribution cavity (519), of the movable tube plate (504) and the fixed tube plate (505); the two distribution cavities (519) are internally provided with a water inlet distribution pipe (520) and a water outlet distribution pipe (521), and two ends of the heat exchange pipe (503) are respectively connected with the water inlet distribution pipe (520) and the water outlet distribution pipe (521); the top and the bottom of the heat exchange cavity (502) are respectively communicated with a flue gas inlet pipe (522) and a flue gas outlet pipe (523).
3. A high efficiency high performance steam flue gas heater according to claim 2 wherein: a plurality of annular fins (102) are fixedly arranged on the heat exchange tube (503), and at least one inverted U-shaped fin (103) is arranged on each annular fin (102); the inverted U-shaped fin (103) consists of two side pieces (104) and a top piece (105) connecting the two side pieces (104), and the two side pieces (104) are respectively arranged on two sides of the corresponding annular fin (102) in a spanning mode; the outer contour of the annular fin (102) is oval; two inverted U-shaped fins (103) are arranged on each annular fin (102), and the two inverted U-shaped fins (103) are respectively arranged at two ends of a short shaft of the oval outer contour of the annular fin (102).
4. A high efficiency high performance steam flue gas heater according to claim 3 wherein: the annular fins (102) on the heat exchange tube (503) are arranged at equal intervals, the outer contours of the annular fins (102) are the same in shape, the long axis directions of the outer contours are the same, and flue gas flows along the long axis direction of the oval outer contour of the annular fins (102); the top sheet (105) of the inverted U-shaped fin (103) is gradually inclined to one side close to the heat exchange tube (503) along the flow direction of smoke;
the annular fin (102) is vertical to the heat exchange tube (503); the two side pieces (104) of the inverted U-shaped fin (103) are parallel to each other, and the two side pieces (104) of the inverted U-shaped fin (103) and the annular fin (102) are inclined at an angle; a smoke guide channel (106) formed by one side piece (104) of the inverted U-shaped fin (103) and the annular fin (102) is narrowed and widened along the smoke flowing direction, and a smoke guide channel (106) formed by the other side piece (104) and the annular fin (102) is widened and narrowed along the smoke flowing direction.
5. A high efficiency high performance steam flue gas heater according to claim 2 wherein: the water inlet distribution pipe (520) comprises a steam main inlet pipe (201), a first annular pipe (202), a steam branch inlet pipe (206) and a second annular pipe (207); the outlet end of the steam main inlet pipe (201) is communicated with a first annular pipe (202), and a first distribution pipe section (203) is arranged on the first annular pipe (202); the first distribution pipe section (203) is provided with a plurality of first distribution holes (204) and is communicated with the first transition cavity (205) through the first distribution holes (204); the first transition cavity (205) is communicated with the inlet ends of a plurality of steam branch inlet pipes (206); the outlet end of the steam inlet pipe (206) is communicated with a second annular pipe (207), and a second distribution pipe section (208) is arranged on the second annular pipe (207); the second distribution pipe section (208) is provided with a plurality of second distribution holes (209) and is communicated with the second transition cavity (210) through the second distribution holes (209); the second transition cavity (210) is communicated with a plurality of heat exchange tubes (503).
6. A high efficiency high performance steam flue gas heater according to claim 5 wherein: a first sleeve (212) is sleeved outside the first distribution pipe section (203), and a first transition cavity (205) is formed between the first sleeve (212) and the first distribution pipe section (203); a second sleeve (213) is sleeved outside the second distribution pipe section (208), and a second transition cavity (210) is arranged between the second sleeve (213) and the second distribution pipe section (208);
the first annular pipe (202) is formed by connecting two straight pipe sections and two U-shaped pipe sections end to end, one straight pipe section on the first annular pipe (202) is a first distribution pipe section (203), and the center of the other straight pipe section on the first annular pipe (202) is connected with the steam main inlet pipe (201); the second annular pipe (207) is formed by connecting two straight pipe sections and two U-shaped pipe sections end to end, one straight pipe section on the second annular pipe (207) is a second distribution pipe section (208), and the center of the other straight pipe section on the second annular pipe (207) is connected with the steam distribution pipe (206);
a plurality of first distribution holes (204) are arranged on one side of the first distribution pipe section (203) facing the steam distribution pipe (206); a plurality of second distribution holes (209) are arranged on one side of the second distribution pipe section (208) facing the plurality of heat exchange pipes (503); the first distribution hole (204) and the second distribution hole (209) are outward-expanding conical holes.
7. A high efficiency high performance steam flue gas heater according to claim 2 wherein: the bottom of the heat exchange cavity (502) is communicated with a flue gas inlet pipe (522) through a flue gas dispersion structure; the smoke dispersing structure comprises a plurality of air inlet channels (306) and a plurality of flow dividing channels (307); the gas outlet (318) of the flue gas inlet pipe (522) is uniformly divided into a plurality of flow dividing ports (309) by a plurality of partition plates (308); the upper ends of the plurality of air inlet channels (306) are communicated with the interior of the heat exchange cavity (502), the lower ends of the plurality of air inlet channels (306) are communicated with the upper ends of the plurality of flow dividing channels (307) in a one-to-one correspondence manner, and the lower ends of the plurality of flow dividing channels (307) are communicated with the plurality of flow dividing ports (309) in a one-to-one correspondence manner; an upper uniform flow plate (310) and a lower uniform flow plate (311) are arranged at the intersection of the air inlet channel (306) and the flow dividing channel (307) at intervals;
a plurality of upper vent holes (312) are formed in the upper uniform flow plate (310), and the upper vent holes (312) are conical holes with upward tips; a plurality of lower vent holes (313) are formed in the lower uniform flow plate (311), and the lower vent holes (313) are conical holes with downward tips; the projections of the upper vent holes (312) and the lower vent holes (313) in the vertical direction are mutually staggered; the cross sections of the upper vent hole (312) and the lower vent hole (313) are regular hexagons; the plurality of upper vent holes (312) and the plurality of lower vent holes (313) are respectively arranged in a honeycomb shape.
8. A high efficiency high performance steam flue gas heater according to claim 7 wherein: the air inlet channel (306) is a vertical channel, the upper end in the air inlet channel (306) is provided with a plurality of flow distribution plates (314), the flow distribution plates (314) are vertical plate bodies, and the flow distribution plates (314) are transversely arranged at equal intervals;
a plurality of air inlets (315) communicated with a plurality of air inlet channels (306) are arranged at the bottom of the heat exchange cavity (502), and a supporting pore plate (316) for assisting in supporting the heat exchange tube (503) is arranged between the adjacent air inlets (315); the top of the heat exchange cavity (502) is provided with a plurality of air outlets (318) communicated with a plurality of air outlet channels (317), and the upper ends of the air outlet channels (317) are communicated with the flue gas outlet pipe (523); the plurality of air outlets (318) are vertically opposed to the plurality of air inlets (315).
9. A high efficiency high performance steam flue gas heater according to claim 2 wherein: an end access hole (410) is formed in one side, far away from the heat exchange cavity (502), of the distribution cavity (404), and an end access door (411) is arranged on the end access hole (410); a plurality of side access holes (412) are arranged on one side of the heat exchange cavity (502), and a side access door (413) is arranged on each side access hole (412);
the left side and the right side of the side access hole (412) are respectively provided with a support plate (414), one side of the two support plates (414) close to each other is respectively provided with a jacking plate (415), and the support plate (414) and the jacking plate (415) on the same side are combined to form an L shape; the jacking plate (415) is provided with a plurality of jacking screw holes (416), jacking bolts (417) are arranged in the jacking screw holes (416), and the end parts of the jacking bolts (417) correspondingly jack the edges of the left side and the right side of the side access door (413); the upper side and the lower side of the side access hole (412) are respectively provided with a plurality of fastening screw holes (418), and the upper end and the lower end of the side access door (413) are respectively provided with a plurality of through holes (419); fastening bolts (420) pass through the through holes (419) and are fitted with corresponding fastening screw holes (418) to fix upper and lower ends of the side access door (413).
10. A high efficiency high performance steam flue gas heater according to claim 9 wherein: an annular groove (421) is formed in the periphery of the side access hole (412), and an annular sealing rubber ring (422) is arranged in the annular groove (421); an annular block (423) is arranged on the inner wall of the side access door (413), and an annular inner sealing groove (424) is formed in the middle of the annular block (423); the annular groove (421) is correspondingly matched with the annular block (423), and the sealing rubber ring (422) is correspondingly matched with the inner sealing groove (424).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111305008.5A CN114166041B (en) | 2021-11-05 | 2021-11-05 | High-efficiency high-performance steam flue gas heater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111305008.5A CN114166041B (en) | 2021-11-05 | 2021-11-05 | High-efficiency high-performance steam flue gas heater |
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| CN114166041B CN114166041B (en) | 2023-11-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206257998U (en) * | 2016-11-14 | 2017-06-16 | 南京华电节能环保设备有限公司 | SGH steam heaters |
| CN110285441A (en) * | 2019-07-06 | 2019-09-27 | 黄林 | A kind of boiler system with residual heat collection function |
| CN212673270U (en) * | 2020-07-06 | 2021-03-09 | 天津普惠节能环保设备有限公司 | Two-inlet two-outlet type flue gas heater |
| CN112555858A (en) * | 2020-12-10 | 2021-03-26 | 唐汉平 | Waste heat thermal dehydration treatment system for waste incineration and waste heat utilization method thereof |
| US20210333013A1 (en) * | 2020-04-28 | 2021-10-28 | A.O. Smith (China) Water Heater Co., Ltd. | Heat exchange pipe, heat exchanger and water heating apparatus |
-
2021
- 2021-11-05 CN CN202111305008.5A patent/CN114166041B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206257998U (en) * | 2016-11-14 | 2017-06-16 | 南京华电节能环保设备有限公司 | SGH steam heaters |
| CN110285441A (en) * | 2019-07-06 | 2019-09-27 | 黄林 | A kind of boiler system with residual heat collection function |
| US20210333013A1 (en) * | 2020-04-28 | 2021-10-28 | A.O. Smith (China) Water Heater Co., Ltd. | Heat exchange pipe, heat exchanger and water heating apparatus |
| CN212673270U (en) * | 2020-07-06 | 2021-03-09 | 天津普惠节能环保设备有限公司 | Two-inlet two-outlet type flue gas heater |
| CN112555858A (en) * | 2020-12-10 | 2021-03-26 | 唐汉平 | Waste heat thermal dehydration treatment system for waste incineration and waste heat utilization method thereof |
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| CN114166041B (en) | 2023-11-17 |
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