CN117128531A - Low-low-temperature economizer - Google Patents
Low-low-temperature economizer Download PDFInfo
- Publication number
- CN117128531A CN117128531A CN202311244730.1A CN202311244730A CN117128531A CN 117128531 A CN117128531 A CN 117128531A CN 202311244730 A CN202311244730 A CN 202311244730A CN 117128531 A CN117128531 A CN 117128531A
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- China
- Prior art keywords
- smoke
- heat exchange
- smoke inlet
- low
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000779 smoke Substances 0.000 claims abstract description 170
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000003546 flue gas Substances 0.000 claims abstract description 65
- 230000000903 blocking effect Effects 0.000 claims abstract description 48
- 239000000428 dust Substances 0.000 claims abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 5
- 235000019504 cigarettes Nutrition 0.000 claims description 28
- 230000000712 assembly Effects 0.000 claims description 15
- 238000000429 assembly Methods 0.000 claims description 15
- 239000004071 soot Substances 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 5
- 238000010926 purge Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000000746 purification Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003872 anastomosis Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
-
- 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
Abstract
The invention relates to the technical field of flue gas purification and discloses a low-temperature economizer, which comprises the following components: the device comprises a body, a heat exchange assembly and an ash blocking component, wherein the body is provided with a smoke inlet and a smoke outlet, the heat exchange assembly and the ash blocking component are arranged in an inner cavity of the body, the heat exchange assembly is used for exchanging heat with smoke, the ash blocking component is positioned at the upstream of the heat exchange assembly and used for initially intercepting dust in the smoke entering the inner cavity and not passing through the heat exchange assembly. The low-temperature economizer is not easy to accumulate ash and has good heat exchange effect.
Description
Technical Field
The invention relates to the technical field of flue gas purification, in particular to a low-temperature economizer.
Background
The economizer is a device which is arranged at the tail flue of the boiler and is used for recovering waste heat in flue gas discharged by the boiler. The economizer can absorb heat in high-temperature flue gas, reduce the exhaust gas temperature of flue gas, and provide assurance for desulfurization and denitrification of subsequent flue gas. In the related art, the problems of ash blockage, high differential pressure, large ventilation resistance and the like easily exist in the use process of the economizer, so that the resistance of the flow of the flue gas in the economizer is increased, the heat exchange effect of the flue gas is affected, and the operation efficiency of the subsequent flue gas desulfurization and denitrification process is reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
The invention provides a low-temperature economizer which is not easy to accumulate ash and has good heat exchange effect.
The low-temperature economizer of the present invention includes: the device comprises a body, a heat exchange assembly and an ash blocking component, wherein the body is provided with a smoke inlet and a smoke outlet, the heat exchange assembly and the ash blocking component are arranged in an inner cavity of the body, the heat exchange assembly is used for exchanging heat with smoke, the ash blocking component is positioned at the upstream of the heat exchange assembly and used for initially intercepting dust in the smoke entering the inner cavity and not passing through the heat exchange assembly.
Optionally, the low-temperature economizer further comprises an acoustic soot blower arranged in the inner cavity for blowing dust accumulated on the heat exchange assembly.
Optionally, the heat exchange assembly comprises a plurality of heat exchange units which are arranged at intervals along the flow direction of the flue gas,
the heat exchange unit comprises a plurality of heat exchange tubes, a first fin and a second fin, wherein the heat exchange tubes are arranged at intervals along the direction orthogonal to the smoke flow direction, the heat exchange tubes extend along the first direction orthogonal to the smoke flow direction, the first fin and the second fin extend along the second direction orthogonal to the smoke flow direction and the first direction, the first fin and the second fin are arranged at intervals along the smoke flow direction, and the heat exchange tubes are connected between the first fin and the second fin along the smoke flow direction.
Optionally, in the longitudinal section of the body along the flue gas flow direction, a ratio of a dimension of the first fin and the second fin in the flue gas flow direction to a space between two adjacent heat exchange tubes of the heat exchange unit is greater than or equal to 1/6 and less than or equal to 1/2.
Optionally, the heat exchange assemblies are multiple, and the multiple heat exchange assemblies are arranged at intervals along the second direction.
Optionally, in the longitudinal section of the body along the flue gas flow direction, the ratio of the gap between two adjacent heat exchange assemblies to the dimension of one heat exchange unit on the flue gas flow is greater than or equal to 1/6 and less than or equal to 5/6.
Optionally, the body has a smoke inlet end and a smoke outlet end, the smoke inlet end opening to form the smoke inlet and the smoke outlet end opening to form the smoke outlet;
the smoke inlet end is connected with a smoke inlet pipeline, a plurality of smoke inlet guide plates are arranged in the smoke inlet pipeline, the smoke inlet guide plates are arranged at intervals along the direction orthogonal to the smoke flow direction, the smoke inlet guide plates divide a smoke inlet channel in the smoke inlet pipeline into a plurality of smoke inlet channel branches, and the flow areas of the smoke inlet channel branches are approximately the same.
Optionally, the cigarette outlet end is connected with a cigarette outlet pipe, a plurality of cigarette outlet guide plates are arranged in the cigarette outlet pipe, the plurality of cigarette outlet guide plates are arranged at intervals along the direction orthogonal to the flowing direction of the smoke, the plurality of cigarette outlet guide plates divide the cigarette outlet flue in the cigarette outlet pipe into a plurality of cigarette outlet flue branches, and the flowing areas of the plurality of cigarette outlet flue branches are approximately the same.
Optionally, the smoke inlet pipeline is an arc-shaped bent pipe, the smoke inlet guide plate is arranged at the bending part of the smoke inlet pipeline and comprises a first smoke inlet section, a second smoke inlet section and an arc smoke inlet section, and the arc smoke inlet section is connected between the first smoke inlet section and the second smoke inlet section;
the cigarette outlet pipeline is an arc-shaped bent pipe, the cigarette outlet guide plate is arranged at the bending part of the cigarette outlet pipeline and comprises a first cigarette outlet section, a second cigarette outlet section and an arc cigarette outlet section, and the arc cigarette outlet section is connected between the first cigarette outlet section and the second cigarette outlet section.
Optionally, the ash blocking component is an ash blocking plate with a smoke passing hole or is composed of a plurality of ash blocking rods, the ash blocking rods are arranged at intervals, and gaps between adjacent ash blocking rods form the smoke passing hole.
The low-temperature economizer can block dust in the flue gas by utilizing the dust blocking component, greatly reduce the impact of the flue gas on the heat exchange component, slow down the abrasion of the heat exchange component, reduce the accumulation degree of the dust in the flue gas on the heat exchange component and improve the heat exchange effect of the economizer.
Drawings
Fig. 1 is a schematic cross-sectional view of a low-temperature economizer structure of an embodiment of the present invention.
Fig. 2 is a schematic structural view of a heat exchange assembly of the low-temperature economizer according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of an acoustic sootblower of a low-temperature economizer of an embodiment of the present invention.
Fig. 4 is a cloud chart of the flue gas velocity of the low-temperature economizer in the embodiment of the invention, wherein the flue gas inlet pipeline is not provided with a guide plate.
Fig. 5 is a cloud chart of the flue gas velocity of a low-temperature economizer provided with a deflector at the flue gas inlet pipe according to an embodiment of the invention.
Reference numerals:
the sound wave soot blower 6 body 1; a smoke inlet end 11; a smoke outlet end 12;
a heat exchange assembly 2; a heat exchange unit 21; a heat exchange tube 211; a first fin 212; a second fin 213;
a smoke inlet pipe 3; a first smoke inlet section 31; a second smoke inlet section 31; arc smoke inlet section 33; a smoke inlet deflector 34; a flue inlet branch 341;
a smoke outlet pipe 4; a first smoke outlet section 41; a second smoke outlet section 42; arc smoke outlet section 43; a smoke-out deflector 44; a flue outlet branch 441;
an ash blocking member 5;
and an acoustic soot blower 6.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1 and 2, the low-temperature economizer of the invention comprises a body 1, a heat exchange component 2 and an ash blocking component 5, wherein the body 1 is provided with a smoke inlet and a smoke outlet, the heat exchange component 2 and the ash blocking component 5 are arranged in an inner cavity of the body 1, the heat exchange component 2 is used for exchanging heat with smoke, and the ash blocking component 5 is positioned at the upstream of the heat exchange component 2 along the flow direction of the smoke in the inner cavity and is used for preliminarily blocking dust in the smoke which enters the inner cavity and does not pass through the heat exchange component 2.
Specifically, as shown in fig. 1, the ash blocking component 5 is arranged below the heat exchange component, and the ash blocking component 5 can play a role in blocking the smoke entering the body 1, so that the smoke entering the body 1 can be prevented from being directly washed on the heat exchange component 2.
It will be appreciated that the ash blocking member 5 may be composed of a plurality of tubes having a cross-sectional profile substantially conforming to the cross-sectional profile of the heat exchange tubes in the heat exchange assembly 2 in a plane orthogonal to the up-down direction.
Preferably, the cross-sectional area of the tube body is greater than or equal to the cross-sectional area of the heat exchange tubes in the heat exchange assembly 2. Thereby playing a better role in blocking ash.
The low-temperature economizer can block dust in the flue gas by utilizing the dust blocking component, greatly reduce the impact of the flue gas on the heat exchange component, slow down the abrasion of the heat exchange component, reduce the accumulation degree of the dust in the flue gas on the heat exchange component and improve the heat exchange effect of the economizer.
It can be understood that the ash blocking component is arranged at the upstream in the heat exchange component, and then the flue gas enters the body through the flue gas inlet, the flue gas is firstly blown to the ash blocking component, and dust, particles and the like carried in the flue gas can be directly attached to the surface of the ash blocking component, so that the dust content and the content of the particles in the flue gas at the downstream of the ash blocking component can be reduced, and the direct impact of the flue gas on the heat exchange component 2 is avoided.
In addition, the ash blocking component 5 can be connected with the body 1 in a detachable manner such as plugging and the like, so that the ash blocking component 5 can be conveniently disassembled and assembled, and the ash blocking component 5 is easier to clean ash compared with a heat exchange component.
Preferably, the ash blocking member 5 is an ash blocking plate with a smoke passing hole or is composed of a plurality of ash blocking rods, the ash blocking rods are arranged at intervals, and gaps between adjacent ash blocking rods form the smoke passing hole. And the lower end of the ash blocking rod is arc-shaped, so that the flow path of the smoke can flow along the arc surface, and the flow path is prevented from being changed greatly when the smoke is flushed onto the ash blocking rod.
Optionally, the low-temperature economizer of the present invention further comprises an acoustic soot blower 6, the acoustic soot blower 6 being disposed in the inner cavity for purging dust accumulated on the heat exchange assembly 2.
In the descaling process of the sonic soot blower 6, the first solid sonic wave is vibration of tiny mass in the solid, and under high-intensity sonic energy is absorbed by the ash particles, so that the ash surface is deformed, loosened and broken. The gradual change process is a process that ash accumulates and absorbs sound energy, and once tiny cracks are generated on the surface of the ash, the sound wave transmits in a vibration state along the cracks, so that the phenomenon that slag-bonding particles are peeled off a heating surface occurs. The second effect is that the ash and dirt adhered to the surface of the heat exchange element is pushed and pulled back and forth to be compressed and stretched continuously, and the ash and dirt are repeatedly acted on the surface by sound waves, and the ash and dirt are broken by the anastomosis effect and gradually loosened and fallen off for tens to hundreds of times per second.
In addition, the acoustic soot blower 6 can adopt magnetic frequency modulation high sound intensity acoustic waves with the consumption of 30000 acoustic watts and compressed air of 20m 3 And/h, applying sound waves to pulling, pressing and shearing forces of ash and slag alternation, and loosening and destroying ash structures when a certain number of stress times are reached. In addition, the action frequency can be adjusted at will between 20 and 8000Hz, so that the aim of releasing vector can be fulfilled by using acoustic energy with different frequencies and different magnitudes to cause resonance of the ash and the dirt.
That is, as shown in fig. 3, the left side is illustrated with heat exchanger surface fouling at t=t 0 Time of day schematic of conditions, right side schematic of heat exchanger surface fouling at t=t 0 As can be appreciated, the state diagram at time +0.5T is that at different times, at the same position on the heat exchangerThe scaling layer can be stressed in different directions, so that the scaling layer on the surface of the heat exchanger is broken and loosened until falling under the repeated action of sound waves.
Optionally, the heat exchange assembly 2 includes a plurality of heat exchange units 21, the plurality of heat exchange units 21 are arranged at intervals along the flue gas flow direction, the heat exchange units 21 include a plurality of heat exchange tubes 211, a first fin 212 and a second fin 213, the plurality of heat exchange tubes 211 are arranged at intervals along a direction orthogonal to the flue gas flow direction (a direction of an arrow in fig. 1 is a direction of flue gas flow), the heat exchange tubes 211 extend along a first direction orthogonal to the flue gas flow direction (a left-right direction in fig. 1), the first fin 212 and the second fin 213 extend along a second direction orthogonal to the flue gas flow direction and the first direction (a front-rear direction in fig. 1), the first fin 212 and the second fin 213 are arranged at intervals along the flue gas flow direction, and the heat exchange tubes 211 are connected between the first fin 212 and the second fin 213 along the flue gas flow direction.
It will be appreciated that as shown in fig. 1, the heat exchange assembly 2 is disposed in the body 1, and at this time, the flow direction of the flue gas flows in a bottom-up direction, and then the heat exchange tube 211 may extend in a left-right direction in fig. 1, and then the first fin 212 and the second fin 213 extend in a front-rear direction in fig. 1. Of course, the heat exchanging tube 211 may extend in the front-rear direction in fig. 1, and the first fin 212 and the second fin 213 extend in the left-right direction in fig. 1. The first fins 212 and the second fins 213 play a role in supporting the heat exchange tube 211, and the length direction of the fins is orthogonal to the length direction of the heat exchange tube 211, so that the heat exchange area can be increased, the heat exchange effect of the heat exchange assembly 2 can be improved, and the heat in the flue gas can be recovered more effectively.
Preferably, the heat exchange assemblies 2 are plural, and the plural heat exchange assemblies 2 are arranged at intervals along the second direction.
That is, the low-temperature economizer can be provided with different numbers of heat exchange assemblies 2 according to different types of economizers (different widths) so as to ensure the heat exchange efficiency of the economizer and improve the recycling rate of the heat of the flue gas.
Alternatively, in a longitudinal section of the body 1 in the flow direction of the flue gas, a ratio of a dimension of the first fin 212 and the second fin 213 in the flow of the flue gas to a spacing between adjacent two heat exchange tubes 211 of the heat exchange unit 21 is 1/6 or more and 1/2 or less.
As shown in fig. 2, the dimension of the first fin 212 and the second fin 213 in the flow of the flue gas is b, and the distance between two adjacent heat exchange tubes 211 in one heat exchange unit 21 is a, 1/6.ltoreq.b/a.ltoreq.1/2.
It can be understood that the larger the ratio of the space between two adjacent heat exchange tubes 211 of the heat exchange unit 21 to the dimensions of the first fins 212 and the second fins 213 in the second direction, the more the number of the heat exchange tubes 211 in the heat exchange unit 21, the more easily the blockage is caused after the ash is deposited on the heat exchange unit 21, the more serious the blockage is caused along with the passing of the flue gas, and the ash is not easily blown away by the sonic soot blower 6; conversely, the smaller the ratio of the space between two adjacent heat exchange tubes 211 of the heat exchange unit 21 to the dimensions of the first fin 212 and the second fin 213 in the second direction, the smaller the number of heat exchange tubes 211 in the heat exchange unit 21, the lower the heat exchange efficiency, and the more heat is wasted in the flue gas.
Optionally, in a longitudinal section of the body 1 along the flow direction of the flue gas, a ratio of a gap between two adjacent heat exchange assemblies 2 to a dimension of one heat exchange unit 21 in the flow direction of the flue gas is 1/6 or more and 5/6 or less.
As shown in FIG. 2, the clearance between two adjacent heat exchange assemblies 2 is c, and the dimension of one heat exchange unit 21 in the flue gas flow is d, then 1/6.ltoreq.c/d.ltoreq.5/6. It will be appreciated that as shown in fig. 1 and 2, the direction of flow of the flue gas is from bottom to top in the body 1, and then the longitudinal section along the direction of flow of the flue gas may be the plane in which fig. 1 is located.
That is, the larger the ratio of the gap between the adjacent two heat exchange assemblies 2 to the size of one heat exchange unit 21 in the direction of flow of the flue gas, the smaller the gap between the adjacent two heat exchange assemblies 2, the more and more likely to cause blocking and the more severe the blocking along with the passing of the flue gas, and the ash and dirt are not easily blown away by the sonic soot blower 6, whereas the smaller the ratio of the gap between the adjacent two heat exchange assemblies 2 to the size of one heat exchange unit 21 in the direction of flow of the flue gas, the larger the gap between the adjacent two heat exchange assemblies 2, the fewer the number of heat exchange assemblies 2 which can be accommodated in the economizer, resulting in a decrease in heat exchange efficiency, and further a waste of heat in the flue gas.
Optionally, the body 1 has a smoke inlet end 11 and a smoke outlet end 12, the smoke inlet end 11 opening to form a smoke inlet and the smoke outlet end 12 opening to form a smoke outlet. The smoke inlet end 11 is connected with a smoke inlet pipe 3, a plurality of smoke inlet guide plates 34 are arranged in the smoke inlet pipe 3, the smoke inlet guide plates 34 are arranged at intervals along the direction orthogonal to the smoke flow direction, the smoke inlet guide plates 34 divide the smoke inlet channel in the smoke inlet pipe 3 into a plurality of smoke inlet channel branches 341, and the flow areas of the smoke inlet channel branches 341 are approximately the same.
Preferably, the smoke inlet pipeline 3 is an arc-shaped bent pipe, the smoke inlet guide plate 34 is arranged at the bending part of the smoke inlet pipeline 3 and comprises a first smoke inlet section 31, a second smoke inlet section 32 and an arc smoke inlet section 33, and the arc smoke inlet section 33 is connected between the first smoke inlet section 31 and the second smoke inlet section 32.
As shown in fig. 1, in the plane where the up-down direction and the left-right direction are located, the smoke inlet guide plates 34 are arc-shaped, and because the inner diameter and the outer diameter of the bent pipe are different, that is, the inner diameter of the bent pipe at the bent position is smaller than the outer diameter, the sizes of the guide plates in the direction that the inner diameter of the inlet pipeline 13 points to the outer diameter are increased, so that the flow areas of the flue branches are ensured to be approximately the same.
In addition, the plurality of first smoke inlet segments 31 uniformly space the smoke inlet duct 3 within the smoke inlet duct 3 to ensure that the flow area of each of the smoke inlet branches 341 is substantially the same. That is, after the flue gas enters from the left end of the smoke inlet pipeline 3, the flue gas flows to the first smoke inlet sections 31, the first smoke inlet sections 31 can divide the flue gas into a plurality of branches, and as the flow area of each smoke inlet branch 341 is approximately the same, the flue gas can be ensured to flow through the smoke inlet guide plates 3 to be in a uniform flow state, so that the flue gas enters the body 1 from the smoke inlet pipeline 3, the flue gas still can uniformly flow and wash the blocking part 5 and the heat exchange component 2, and further, the dust accumulation on the heat exchange component 2 can be ensured to be uniform, and the soot blowing cleaning of the acoustic wave soot blower 6 is facilitated.
It should be noted that, according to the experimental comparison, the plurality of smoke inlet guide plates 34 are arranged in the smoke inlet pipe 3, so that the smoke flow rate can be obviously improved, that is, as shown in fig. 4 and 5, in the longitudinal section of the same height of the body 1, the smoke flow rate difference is smaller, so that the abrasion effect of the smoke after entering the body 1 and contacting with part of the surface of the heat exchange assembly 2 is weakened, and the possibility of serious local abrasion and even leakage of the economizer in the use process is avoided.
The smoke outlet pipe 4 is an arc-shaped bent pipe, the smoke outlet guide plate 44 is arranged at the bending part of the smoke outlet pipe 4 and comprises a first smoke outlet section, a second smoke outlet section 42 and an arc smoke outlet section 43, and the arc smoke outlet section 43 is connected between the first smoke outlet section and the second smoke outlet section 42.
It will be appreciated that the principle of the smoke outlet pipe 4 and the smoke outlet guide plate 44 is the same as that of the smoke inlet pipe 3 and the smoke inlet guide plate 34 respectively, so that uniform and stable discharge of smoke from the smoke outlet pipe 4 can be ensured, and the subsequent equipment can process uniform and stable smoke conveniently.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.
Claims (10)
1. A low-temperature economizer, characterized by comprising: the device comprises a body, a heat exchange assembly and an ash blocking component, wherein the body is provided with a smoke inlet and a smoke outlet, the heat exchange assembly and the ash blocking component are arranged in an inner cavity of the body, the heat exchange assembly is used for exchanging heat with smoke, the ash blocking component is positioned at the upstream of the heat exchange assembly and used for initially intercepting dust in the smoke entering the inner cavity and not passing through the heat exchange assembly.
2. The low-and-low-temperature economizer of claim 1 further comprising an acoustic wave soot blower disposed in the inner cavity for purging dust accumulated on the heat exchange assembly.
3. The low-and-low-temperature economizer according to claim 1, wherein the heat exchange assembly comprises a plurality of heat exchange units, the plurality of heat exchange units being arranged at intervals along the flow direction of the flue gas,
the heat exchange unit comprises a plurality of heat exchange tubes, a first fin and a second fin, wherein the heat exchange tubes are arranged at intervals along the direction orthogonal to the smoke flow direction, the heat exchange tubes extend along the first direction orthogonal to the smoke flow direction, the first fin and the second fin extend along the second direction orthogonal to the smoke flow direction and the first direction, the first fin and the second fin are arranged at intervals along the smoke flow direction, and the heat exchange tubes are connected between the first fin and the second fin along the smoke flow direction.
4. The low-temperature economizer according to claim 3, wherein a ratio of a dimension of the first fin and the second fin in the flue gas flow direction to a spacing between adjacent two heat exchange tubes of the heat exchange unit is 1/6 or more and 1/2 or less in a longitudinal section of the body in the flue gas flow direction.
5. The low-and-low-temperature economizer according to claim 3, wherein the plurality of heat exchange assemblies are arranged at intervals along the second direction.
6. The low-temperature economizer according to claim 5, wherein a ratio of a gap between adjacent two of the heat exchange assemblies to a dimension of one of the heat exchange units in the flow direction of the flue gas is 1/6 or more and 5/6 or less in a longitudinal section of the body in the flow direction of the flue gas.
7. The low-and-low-temperature economizer according to any one of claims 1-6, wherein the body has a smoke inlet end and a smoke outlet end, the smoke inlet end opening to form the smoke inlet and the smoke outlet end opening to form the smoke outlet;
the smoke inlet end is connected with a smoke inlet pipeline, a plurality of smoke inlet guide plates are arranged in the smoke inlet pipeline, the smoke inlet guide plates are arranged at intervals along the direction orthogonal to the smoke flow direction, the smoke inlet guide plates divide a smoke inlet channel in the smoke inlet pipeline into a plurality of smoke inlet channel branches, and the flow areas of the smoke inlet channel branches are approximately the same.
8. The low-and-low-temperature economizer according to claim 7, wherein the smoke outlet end is connected with a smoke outlet pipe, a plurality of smoke outlet guide plates are arranged in the smoke outlet pipe, the smoke outlet guide plates are arranged at intervals along the direction orthogonal to the smoke flow direction, the smoke outlet guide plates divide a smoke outlet channel in the smoke outlet pipe into a plurality of smoke outlet channel branches, and the flow areas of the smoke outlet channel branches are approximately the same.
9. The low-and-low-temperature economizer according to claim 8, wherein the smoke inlet pipe is an arc-shaped bent pipe, the smoke inlet guide plate is arranged at a bent part of the smoke inlet pipe and comprises a first smoke inlet section, a second smoke inlet section and an arc smoke inlet section, and the arc smoke inlet section is connected between the first smoke inlet section and the second smoke inlet section;
the cigarette outlet pipeline is an arc-shaped bent pipe, the cigarette outlet guide plate is arranged at the bending part of the cigarette outlet pipeline and comprises a first cigarette outlet section, a second cigarette outlet section and an arc cigarette outlet section, and the arc cigarette outlet section is connected between the first cigarette outlet section and the second cigarette outlet section.
10. The low-and-low-temperature economizer according to claim 1, wherein the ash blocking member is an ash blocking plate having a smoke passing hole or is constituted by a plurality of ash blocking rods, a plurality of the ash blocking rods being arranged at intervals, and a gap between adjacent ash blocking rods constituting the smoke passing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311244730.1A CN117128531A (en) | 2023-09-25 | 2023-09-25 | Low-low-temperature economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311244730.1A CN117128531A (en) | 2023-09-25 | 2023-09-25 | Low-low-temperature economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117128531A true CN117128531A (en) | 2023-11-28 |
Family
ID=88852846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311244730.1A Pending CN117128531A (en) | 2023-09-25 | 2023-09-25 | Low-low-temperature economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117128531A (en) |
-
2023
- 2023-09-25 CN CN202311244730.1A patent/CN117128531A/en active Pending
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