CN107023817B - Low-temperature economizer with straight-through structure - Google Patents
Low-temperature economizer with straight-through structure Download PDFInfo
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- CN107023817B CN107023817B CN201610068683.3A CN201610068683A CN107023817B CN 107023817 B CN107023817 B CN 107023817B CN 201610068683 A CN201610068683 A CN 201610068683A CN 107023817 B CN107023817 B CN 107023817B
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- 239000003546 flue gas Substances 0.000 claims abstract description 39
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000007704 transition Effects 0.000 claims abstract description 18
- 239000000779 smoke Substances 0.000 claims description 20
- 238000000926 separation method Methods 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000002918 waste heat Substances 0.000 abstract description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 14
- 239000000428 dust Substances 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 229920002313 fluoropolymer Polymers 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- MXWHMTNPTTVWDM-NXOFHUPFSA-N mitoguazone Chemical compound NC(N)=N\N=C(/C)\C=N\N=C(N)N MXWHMTNPTTVWDM-NXOFHUPFSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
-
- 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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the technical field of boiler flue gas waste heat recovery equipment, in particular to a low-temperature economizer with a straight channel structure, which comprises a heat transfer module, a medium pipe box arranged at one end of the heat transfer module and flue transition boxes arranged at the upper side and the lower side of the heat transfer module.
Description
Technical Field
The invention relates to the technical field of boiler flue gas waste heat recovery equipment, in particular to a low-temperature economizer with a straight-through structure.
Background
The smoke exhaust loss is the most important heat loss in industrial boiler production, and the smoke exhaust temperature is about 150 ℃ to reduce the smoke exhaust loss; the smoke exhaust temperature is reduced, energy can be effectively saved, the economical efficiency is improved, and the environmental protection benefit, the social benefit and the economic benefit brought by the smoke exhaust temperature are immeasurable.
For industrial boilers, especially boilers of thermal power generation enterprises, the flue gas mostly contains a large amount of dust, NOx, SO2 and SO3, and the flue gas is required to be cooled, dedusted, denitrated and desulfurized before being allowed to be discharged into the atmosphere because of the requirements of environmental protection and energy conservation, and the current common practice is to adopt a low-temperature economizer technology, which mainly comprises the following steps:
1. as a low-temperature economizer, the boiler condensate is heated by the low-temperature economizer, and the flue gas temperature is reduced under the condition of increasing the boiler feed water temperature, so that the waste heat recovery effect is realized.
2. As a low-temperature economizer, the low-temperature economizer is used for a heat medium water-flue gas heat exchange system (MGGH), on one hand, the efficiency of an electric dust collector is improved, the water consumption of a desulfurizing tower is reduced by reducing the temperature of raw flue gas, and on the other hand, the ultra-clean discharge of flue gas is realized by improving the temperature of clean flue gas.
At present, the international main low-temperature economizer mainly comprises an H-type fin low-temperature economizer (fin tube type) and a fluoroplastic tube type low-temperature economizer, however, the two types of economizers have the problems of different degrees in practical application:
for the H-shaped fin low-temperature economizer, when the boiler adopts medium sulfur-containing coal or high sulfur-containing coal, because a great amount of dust and SO3 are contained in raw smoke, sulfuric acid steam is condensed when the wall temperature of a heat transfer surface is lower than the acid dew point temperature, and on the H fins, particularly on the leeward side, dust is easily accumulated due to stagnation, the dust reacts with the condensed sulfuric acid to form adhesive sulfate, and once the sulfate is formed, dust accumulation is aggravated, SO that vicious circulation is extremely easy to occur, and fin blockage and heat exchange tube corrosion leakage are extremely easy to occur.
For the fluoroplastic pipe type low-temperature economizer, because the fluoroplastic has poor heat conductivity, a thin-wall (about 1 mm) small-diameter fluoroplastic pipe (about 10 mm) is usually selected, so that one low-temperature economizer needs thousands of fluoroplastic pipes, although the corrosion problem is solved, the end connection and pressure bearing problems of the fluoroplastic pipes are not solved well, and a certain problem exists in long-period use, so that the popularization degree is not high.
Disclosure of Invention
The invention aims to solve the technical problems of low heat transfer efficiency, large volume and unreliable joints of the existing fluoroplastic pipe economizer and the technical problems of easy blockage and easy scaling of the H-shaped fin economizer, and provides the straight-channel structure low-temperature economizer which can solve the problems of smoke blockage, scale corrosion and the like while improving heat transfer.
In the low-temperature economizer, due to the influence of heat transfer temperature, when the wall temperature of a heat transfer element is lower than the dew point of sulfuric acid steam, sulfuric acid condensation cannot be avoided, but the reasons of blockage and scaling corrosion are ash accumulation, when the ash adheres to the surface of the heat transfer element, alkaline oxides such as CaO, al2O3, fe3O4 and the like contained in the ash react with sulfuric acid to form adhesive sulfate, and under the action of the adhesive sulfate, a large amount of dust in flue gas is adsorbed, so that the ash accumulation is further aggravated and the under-scaling corrosion is generated. Thus, avoiding heat transfer element surface area ash is the primary approach to solving plugging and fouling corrosion. The main cause of ash deposition is also due to the existence of stagnant flow regions, which need to be eliminated by means of a uniform flow field, a highly turbulent flow pattern.
Based on the mechanism analysis of the ash deposition, the scaling and the scaling corrosion, the invention originally provides the straight-through runner low-temperature economizer, in the economizer, a corrugated plate type heat transfer element is utilized to obtain a high turbulence flow state, a flue gas runner is designed into a straight-through channel, a flow field of flue gas along the flow direction of the flue gas is very uniform, a detention area is eliminated, thus the ash deposition problem is solved, correspondingly, sulfuric acid is condensed on the surface of the heat transfer element even if the sulfuric acid is condensed on the surface of the heat transfer element, and because the catalysis of the ash deposition is not carried out, cohesive sulfate cannot be formed on the heat transfer surface, further, scaling is avoided, and thus, the blocking problem and the scaling corrosion problem can be well solved.
The invention is realized by the following technical scheme:
the utility model provides a low-temperature economizer of straight channel structure, includes heat transfer module, locates the medium pipe case of heat transfer module one end and locates the flue transition case of heat transfer module upper and lower both sides, flue transition case upper and lower both ends are equipped with the flue gas passageway mouth respectively, medium pipe case includes medium entry, medium export and locates the branch journey baffle between medium entry and the medium export, heat transfer module includes one or more plate bundle module, every the plate bundle module includes many sheets, the sheet includes main heat transfer surface, evenly distributed locates the pressure-bearing ripple and locating heat transfer surface one end and the branch journey ripple that extends to the other end, pressure-bearing ripple and branch journey ripple are concave ripple for main heat transfer surface, pressure-bearing ripple and the height of branch journey ripple equals 1/2 of medium inter-lateral plate runner interval, the interior pressure-bearing ripple of longitudinal channel and pressure-bearing ripple are relative and form contact, branch journey ripple and branch journey ripple are relative and form the contact along the interior pressure-bearing ripple of longitudinal channel and pressure-bearing ripple.
The plate also comprises turbulent flow waves uniformly distributed on the main heat transfer surface, the height of the turbulent flow waves is less than 1/2 of the interval between the flue gas side plates, and in the transverse flow passage, the turbulent flow waves are opposite to the turbulent flow waves and do not form contacts.
The width of the plate is not more than 1200mm, and the length-width ratio of the plate is not less than 2.
The split-range corrugation is straight corrugation penetrating along the length direction of the plate, the heat transfer module is provided with a range folding box at the opposite side of the medium pipe box, and a range folding channel is arranged in the range folding box.
The branch path waves are straight waves which are intermittent at one end and are arranged along the length direction of the plate, folding path waves are arranged at the intermittent positions of the branch path waves, and the folding path waves are continuous or intermittent waves and are concave waves relative to the main heat transfer surface.
The plate is provided with supporting waves or supporting bars which extend along the direction perpendicular to the branched wave direction and are arranged in an array along the branched wave extending direction, the supporting waves or supporting bars are arranged continuously or discontinuously, and the depth of the supporting waves and the height of the supporting bars are equal to 1/2 of the interval between the flue gas side plates.
And a smoke guide plate is arranged at the smoke inlet or the smoke outlet of the flue transition box.
The utility model provides a low-temperature economizer of straight channel structure, its characterized in that includes heat transfer module, locates the medium pipe case at heat transfer module both ends and locates the flue transition case of heat transfer module upper and lower both sides, flue transition case upper and lower both ends are equipped with the flue gas passageway mouth respectively, and the medium pipe case of one end is equipped with the medium entry, and the medium pipe case of the other end is equipped with the medium export, heat transfer module includes one or more plate bundle module, every the plate bundle module includes a plurality of plates, the plate includes main heat transfer surface and evenly distributed in the pressure-bearing ripple of main heat transfer surface, the pressure-bearing ripple is concave ripple for main heat transfer surface, the height of pressure-bearing ripple equals 1/2 of medium curb plate runner interval, and the plate both sides form along the medium side longitudinal channel of plate length direction and along the flue gas side transverse channel of plate width direction, pressure-bearing ripple and pressure-bearing ripple are relative and form contact in the longitudinal channel, branch journey ripple and branch journey ripple are relative and form the contact.
The width of the plate is not more than 1200mm, and the length-width ratio of the plate is not less than 2; the plate also comprises turbulent flow waves uniformly distributed on the main heat transfer surface, the height of the turbulent flow waves is less than 1/2 of the interval between the flue gas side plates, and in the transverse flow passage, the turbulent flow waves are opposite to the turbulent flow waves and do not form contacts.
The plate is provided with supporting waves or supporting bars which extend along the direction perpendicular to the branched wave direction and are arranged in an array along the branched wave extending direction, the supporting waves or supporting bars are arranged continuously or discontinuously, and the depth of the supporting waves and the height of the supporting bars are equal to 1/2 of the interval between the flue gas side plates.
The beneficial effects of the invention are as follows:
(1) The flue gas channel of the straight-through runner economizer is a transverse straight-through runner, the cross section of the straight-through runner basically keeps unchanged along the flue gas flowing direction and has no contact, the flue gas stroke is very short, the flue gas turbulence degree in the runner is high, the flowing field is very uniform, and the problems of dust accumulation, blockage and scaling are solved.
(2) The medium channel of the straight-through runner economizer is a longitudinal fold Cheng Liudao, the medium flowing in the longitudinal fold and the flue gas flowing in the transverse direction are subjected to staggered countercurrent heat exchange, the problem that the heat transfer characteristics of the medium and the flue gas are not matched is solved, and the total heat transfer efficiency of the economizer is improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention
FIG. 2 is a schematic view of a plate structure constituting the present invention;
FIG. 3 is a cross-sectional view of a panel bundle module embodying the present invention taken along the section C-C of the panel;
FIG. 4 is a cross-sectional view of a panel bundle module according to the present invention taken along the section D-D of the panel;
FIG. 5 is a schematic view of a plate structure with a folding path ripple constituting the present invention;
FIG. 6 is a schematic structural view of another embodiment of the present invention;
FIG. 7 is a schematic illustration of a plate construction with support corrugations or braces forming the present invention;
FIG. 8 is a cross-sectional view of a panel bundle module embodying the present invention taken along the plane E-E;
fig. 9 is a schematic structural view of another embodiment of the present invention.
Fig. 10 is a schematic structural view of an embodiment of the heat transfer module of the present invention having medium pipe boxes at both ends thereof.
In the figure: 1. heat transfer module, medium pipe box, flue transition section, plate bundle module, plate sheet 6, folding box
201, a separation partition plate, 202, a flat cover, 301, a smoke guide plate, 501, a main heat transfer surface, 502, turbulence waves, 503, pressure waves, 504, separation waves, 505, separation waves, 506, supporting waves, 507, supporting strips, 601, a flat cover, A, smoke and B, medium;
Detailed Description
The present invention will be described in further detail below with reference to the drawings and preferred embodiments, so that those skilled in the art can better understand the technical solutions of the present invention.
As shown in fig. 1, 2, 3 and 4, the plate 5 constituting the plate bundle module 4 of the present invention includes a main heat transfer surface 501, a turbulence wave 502, a pressure-bearing wave 503 and a branching wave 504, the turbulence wave 502 is a convex wave with respect to the main heat transfer surface 501, the pressure-bearing wave 503 and the branching wave 504 are concave waves with respect to the main heat transfer surface, and accordingly, after the plate bundle module 4 is laminated with a plurality of plates 5, a fold Cheng Liudao flowing along a longitudinal folding path and a transverse through flow path flowing along a plate width direction are formed in the plate bundle module 4, respectively. The longitudinal folds Cheng Liudao serve as flow channels for the medium B and the transverse straight-through flow channels serve as flow channels for the flue gas a. The flue gas A and the medium B exchange heat in a staggered countercurrent mode in the plate bundle module 4, and the number of the folding strokes on the side of the medium B is adjusted according to the heat transfer characteristic parameters of the flue gas A and the medium B, so that the optimal combination of the flow of the flue gas A and the medium B is realized, and the aim of improving the total heat transfer efficiency of the economizer is further realized.
In the invention, the plate bundles have two forming modes, wherein one of the plate bundles is an inlet and an outlet formed by bending the periphery of a plate, the plate bundles are buckled in pairs to form plate pairs, and the plate bundles comprise a plurality of plate pairs which are mutually overlapped; the other is that the plates are sequentially stacked into plate bundles through the plates, the plates and the bands, and the plates are sequentially assembled.
In the longitudinal flow passage of the medium B, the pressure-bearing corrugation 503 is opposite to the pressure-bearing corrugation 503, the branch corrugation 504 is opposite to the branch corrugation 504, when the height of the pressure-bearing corrugation 503 and the branch corrugation 504 is equal to 1/2 of that of the side flow passage, the tops of the pressure-bearing corrugation 503 are contacted to form a contact point, the pressure-bearing capacity of the plate pipe can be improved by welding the contact point, and the contact surface between the branch corrugations is welded to prevent the fluid short circuit of the folding flow; in the transverse flow passage of the flue gas A, the turbulent flow corrugation 502 is opposite to the turbulent flow corrugation 502, the height of the turbulent flow corrugation 502 is less than 1/2 of the height of the side flow passage, no contact is formed after the assembly, the transverse flow passage is a transverse non-contact through flow passage, and the flow passage section basically keeps unchanged along the flow direction of the flue gas. Since the plate length to plate width ratio of the plate sheet constituting the present invention is not less than 2, the stroke of the flue gas flow path is short. Under the action of turbulent flow waves and high-speed smoke, the turbulence degree of the smoke in the flow channel is very high, the influence of a contact point is avoided, a stagnation area cannot be formed, the flow field is very uniform, smoke dust cannot adhere to the surface of the plate, and adhesive sulfate cannot be formed on the surface of the plate, so that the problems of dust accumulation, blockage and scaling are solved.
When the number of the plate bundle modules 4 is 1, the plate bundle modules 4 are the heat transfer modules 1; when the number of the plate bundle modules 4 is greater than 1, a plurality of the plate bundle modules 4 are combined into the heat transfer module 1. The plate bundle module 4 is connected with the medium pipe box 2 at one end along the length direction of the plate sheet 5, and is used as an inlet and outlet pipe box of the medium B, the other side pipe box is used as a folding box 6 of the medium B, and correspondingly, a separation partition 201 is arranged on the medium pipe box 2; in order to facilitate the maintenance of the end of the plate bundle module 4, the end of the medium pipe box is provided with a flat cover 202, the folding box is provided with a flat cover 601, and the flat cover is connected with the pipe box body by adopting a flange. The two ends of the heat transfer module 1 along the width direction of the plate 5 are respectively connected with the flue transition section 3. The shape of the flue transition section is determined according to the section of the flue, namely: when the section of the flue is circular, the shape of the transition section of the flue is a square-sky circular structure; when the section of the flue is rectangular, the shape of the transition section of the flue is a ladder table structure, and the other shapes are similar. In order to ensure that the flue gas can enter and exit the flue gas flow channel more uniformly, a flue gas guide plate is arranged at the transition section of the inlet flue and the transition section of the outlet flue.
As shown in fig. 5 and 6, when the sheet 5 of the present invention is provided with the folding corrugation 505 in the same direction as the dividing corrugation, the medium B can be folded directly at the end of the sheet 4 without providing the folding box 6. Since the corrugation direction of the folding corrugation 505 is opposite to the dividing corrugation 504, the flow passage section of the flue gas side a is not affected at all, and is still a straight-passage lateral flow passage.
Correspondingly, when the number of the pass-through corrugations on the plate is m and corresponds to the number m+1 of the longitudinal flow passes of the plate, the baffle corrugations are arranged at the outlet of the nth pass and the inlet of the n+1th pass, and the medium B can directly realize multi-pass baffle in the plate bundle without arranging a pass-through box, so that the structural compactness of the economizer is greatly improved.
As shown in fig. 7 and 8, the plate sheet forming the invention is additionally provided with the supporting corrugation 506 or the supporting strips 507, so that the transverse flow channel of the original medium a in the heat transfer module is divided into a plurality of smaller transverse flow channels along the length direction of the plate sheet, the supporting corrugation 506 or the supporting strips 507 only support the transverse flow channels, the original transverse flow channel spacing and the original flow channel characteristics (uniform flow field, high turbulence, no contact, no stagnation area and the like) are not affected at all, and the original innovation point is still fully applicable.
As shown in fig. 9, when the number of the plate bundle modules 4 forming the invention is greater than 1, a plurality of plate bundle modules 4 are combined into a heat transfer module 1 according to a certain mode, when the number of the plate bundle modules 4 is 2, two plate bundle modules 4 can be combined into the heat transfer module 1 side by side (as shown in fig. 9), and can also be combined into the heat transfer module 1 back to back along the plate stacking direction according to a Chinese character 'ri'; when the number of the plate bundle modules is 4, 2 plate bundle modules can be arranged back to back along the plate stacking direction on the basis of the arrangement shown in fig. 9, namely, the plate bundle modules are combined into the heat transfer module 1 in a mode of 'field' -shaped, and the like. Each plate bundle module 4 is connected with a respective medium pipe box 2, one end of the combined heat transfer module 1 is connected with the flue transition section 3 at the inlet side, and the other side is connected with the flue transition section 3 at the outlet side.
In another embodiment of the present invention, as shown in fig. 10, medium tube boxes are disposed at two ends of the heat transfer module, one end of the medium tube box is provided with a medium inlet, the other end of the medium tube box is provided with a medium outlet, the heat transfer module comprises one or more plate bundle modules, each plate bundle module comprises a plurality of plates, the plates comprise a main heat transfer surface and pressure-bearing waves uniformly distributed on the main heat transfer surface, the pressure-bearing waves are concave waves relative to the main heat transfer surface, the height of the pressure-bearing waves is equal to 1/2 of the flow channel spacing between the medium side plates, two sides of the plates form a longitudinal channel of the medium side along the length direction of the plates and a transverse channel of the smoke side along the width direction of the plates, and the pressure-bearing waves in the longitudinal channel are opposite to the pressure-bearing waves and form contacts, and the branch waves are opposite to the branch waves and form contacts.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (1)
1. The low-temperature economizer with the straight channel structure is characterized by comprising a heat transfer module, a medium pipe box arranged at one end of the heat transfer module and flue transition boxes arranged at the upper side and the lower side of the heat transfer module, wherein flue passage openings are respectively arranged at the upper end and the lower end of the flue transition boxes, the medium pipe box comprises a medium inlet, a medium outlet and a separation partition plate arranged between the medium inlet and the medium outlet, the heat transfer module comprises one or more plate bundle modules, each plate bundle module comprises a plurality of plates, each plate bundle module comprises a main heat transfer surface, pressure-bearing waves uniformly distributed on the main heat transfer surface and separation waves which are arranged at one end of the heat transfer surface and extend towards the other end, the pressure-bearing waves and the separation waves are concave waves relative to the main heat transfer surface, the heights of the pressure-bearing waves and the separation waves are equal to 1/2 of the flow passage distance between medium side plates, medium side longitudinal channels along the length direction of the plates and flue gas side transverse channels along the width direction of the plates are formed at two sides of the plates, and the pressure-bearing waves and the separation waves in the longitudinal channels are opposite to the pressure-bearing waves and form contacts and the separation waves and contact; the plate also comprises turbulent flow waves uniformly distributed on the main heat transfer surface, the height of the turbulent flow waves is less than 1/2 of the flow passage distance between the smoke side plates, and the turbulent flow waves are opposite to the turbulent flow waves in the transverse passage and do not form contacts; the width of the plate is not more than 1200mm, and the length-width ratio of the plate is not less than 2; the split-range corrugation is straight corrugation which is penetrated along the length direction of the plate, the heat transfer module is provided with a folding range box at the opposite side of the medium pipe box, and a folding range channel is arranged in the folding range box; the branched wave is a straight wave which is intermittently arranged at one end along the length direction of the plate, a folding wave is arranged at the intermittent part of the branched wave, and the folding wave is continuous or intermittent wave and is concave wave relative to the main heat transfer surface; the plate is provided with supporting waves or supporting bars which extend along the direction perpendicular to the branched wave direction and are arranged in an array along the branched wave extending direction, the supporting waves or supporting bars are arranged continuously or discontinuously, and the depth of the supporting waves and the height of the supporting bars are equal to 1/2 of the interval between the flue gas side plates; and a smoke guide plate is arranged at the smoke inlet or the smoke outlet of the flue transition box.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610068683.3A CN107023817B (en) | 2016-02-01 | 2016-02-01 | Low-temperature economizer with straight-through structure |
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| CN201610068683.3A CN107023817B (en) | 2016-02-01 | 2016-02-01 | Low-temperature economizer with straight-through structure |
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| CN107023817A CN107023817A (en) | 2017-08-08 |
| CN107023817B true CN107023817B (en) | 2023-10-27 |
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| CN107726831A (en) * | 2017-09-01 | 2018-02-23 | 苏州卓润赛豚节能环保科技有限公司 | A kind of low temperature exhaust heat processing method of dry tail gas |
| CN107606928A (en) * | 2017-09-01 | 2018-01-19 | 苏州卓润赛豚节能环保科技有限公司 | A kind of low temperature exhaust heat processing equipment of dry tail gas |
| CN110220400B (en) * | 2019-05-17 | 2024-03-29 | 天津华赛尔传热设备有限公司 | All-welded plate type gas-gas heat exchanger |
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|---|---|---|---|---|
| CN102954459A (en) * | 2012-11-12 | 2013-03-06 | 同济大学 | Novel plate type economizer |
| CN104033881A (en) * | 2013-03-04 | 2014-09-10 | 同济大学 | Plate-and-shell type coal economizer |
| CN206001436U (en) * | 2016-02-01 | 2017-03-08 | 天津华赛尔传热设备有限公司 | A kind of straight passage structures low-level (stack-gas) economizer |
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|---|---|
| CN107023817A (en) | 2017-08-08 |
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