CN107702123A - It is incubated flue and the preparation method for being incubated flue - Google Patents
It is incubated flue and the preparation method for being incubated flue Download PDFInfo
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- CN107702123A CN107702123A CN201710906811.1A CN201710906811A CN107702123A CN 107702123 A CN107702123 A CN 107702123A CN 201710906811 A CN201710906811 A CN 201710906811A CN 107702123 A CN107702123 A CN 107702123A
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- flue
- anchoring piece
- insulation
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- air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chimneys And Flues (AREA)
- Building Environments (AREA)
Abstract
The present invention relates to electric furnace smelting field, specifically discloses a kind of insulation flue and a kind of preparation method for being incubated flue.The insulation flue includes housing and forms the heat-insulation layer in shell inner surface, on heat-insulation layer interval formed with a plurality of length direction along heat-insulation layer through set and with twine away from air-guiding aisle, to cause the flue gas entered in insulation flue to form whirlwind in the presence of air-guiding aisle, so as to reduce sedimentation of the cigarette ash in flue gas in flue is incubated.The insulation flue of the present invention greatly reduces accumulation of the cigarette ash in insulation flue in flue gas, so as to effectively improve the operating efficiency of insulation flue and equipment for after-treatment.
Description
Technical field
The present invention relates to electric furnace smelting field, and in particular to a kind of to be incubated flue and a kind of preparation method for being incubated flue.
Background technology
Flue is a kind of link burner hearth and equipment for after-treatment, carries the part of flue gas.Used in present industrial design and construction
Large-scale flue be broadly divided into brick and be blended two kinds of flue and steel flue.But which kind of flue no matter used, its inner wall surface compared with
For smooth and opposing straight so that the flow regime of flue gas wherein is simple, causes smoke settlement rate high.In consideration of it, existing
Flue in, inevitably need to set large-scale expansion chamber or ash-storing bin in flue long distance delivery.So not only increase
Add investment and floor space, more severely impact the flexibility of flue arrangement.
In addition, in large scale industry production, the complicated flue gas of various operating modes, such as ash content weight, temperature height or property can be run into
The viscous flue gas of matter, after these flue gases enter flue, be easily attached to the inner wall surface of flue, the heat-transfer surface of equipment for after-treatment with
And on radiating surface, this just greatly have impact on the transfer efficiency of flue gas, while also increase the maintenance of flue and equipment for after-treatment
Cost.
In view of the deficiencies of the prior art, the highly desirable one kind of seeking of those skilled in the art can reduce flue gas heap
Product, so as to be effectively improved the flue of the operating efficiency of equipment for after-treatment.
The content of the invention
In order to reduce the flue gas accumulation in insulation flue, so as to be effectively improved the work of insulation flue and equipment for after-treatment
Efficiency, the present invention propose a kind of insulation flue.
According to the insulation flue of the present invention, including housing and the heat-insulation layer in shell inner surface is formed, be spaced on heat-insulation layer
Formed with a plurality of length direction along heat-insulation layer through set and with twine away from air-guiding aisle, with cause enter insulation flue in
Flue gas whirlwind is formed in the presence of air-guiding aisle, so as to reduce sedimentation of the cigarette ash in flue gas in flue is incubated.
Further, under the expansion its flat presentation of heat-insulation layer, each air-guiding aisle is linear passageway, and each linear passageway
Inclination and spaced and parallel setting on heat-insulation layer.
Further, the inner surface of linear passageway is arcwall face, and is formed as smooth between adjacent two linear passageway
Curved surface.
Further, housing is formed from steel, and heat-insulation layer is made up of refractory casting material.
The invention also provides a kind of preparation method for making above-mentioned insulation flue, comprise the following steps：Step 1：
By calculate obtain heat-insulation layer relevant parameter, the parameter comprise at least heat-insulation layer minimum thickness, the depth of air-guiding aisle,
The number of air-guiding aisle and air-guiding aisle twine away from；Step 2：Anchor is laid on the tabular steel plate for forming the housing
Firmware, the anchoring piece include the first anchoring piece and the second anchoring piece, and the height of first anchoring piece is more than second anchor
The height of firmware, the anchoring piece of gain of parameter first and the height and arrangement mode of the second anchoring piece obtained according to step 1,
During so that the proper tabular steel plate being formed as tabular, first anchoring piece and the second anchoring piece are in the tabular steel plate
The first-class interleaved of same oblique line is set, and when the tabular steel plate curl shape turns into cylindric, it is oblique positioned at the same
First anchoring piece on line is equal with the height of the second anchoring piece, so that the oblique line shape turns into the high dotted line of air-guiding aisle；
Step 3：The tabular steel plate is welded, the smearing to carrying out refractory casting material between adjacent high dotted line, with phase
The heat-insulation layer with the air-guiding aisle is formed between adjacent high dotted line.
Further, in step 1, comprise the following steps：The exhausted of material is poured according to the concrete condition of flue gas and fire resisting
Hot coefficient calculates the minimum thickness h of heat-insulation layer, and passes through D2=D-h obtains the mean inside diameter D of heat-insulation layer2, wherein, D is tabular steel
Internal diameter during coiled sheet song；According to formula S=150*3.14 (D2)4/ 16 calculate the twining away from S of the air-guiding aisle；According to formula b1
=D3-D1=D1/ 7, D1=2D2-D3Calculate the depth b of the air-guiding aisle1, heat-insulation layer minimum diameter D3With heat-insulation layer
Maximum inner diameter D1；According to formula n=3.14*D1/(b1* V/10) the number n of the air-guiding aisle is calculated, wherein, V is flue gas
Economic velocity.
Further, in step 2, the second anchoring piece matrix form is arranged on the tabular steel plate, wherein,
The center for the rectangle that four the second anchoring pieces of arbitrary neighborhood are formed is provided with the first anchoring piece, to cause first anchor
Firmware is set with the first-class interleaved of same oblique line of second anchoring piece on the tabular steel plate.
Further, in the step 2, the anchoring piece of gain of parameter first and the second anchor obtained in step 1 is passed through
The height of firmware and the method for arrangement mode include：Adjacent second anchoring piece is calculated according to formula b=3.14*D/20
Horizontal spacing b；The longitudinal pitch d of adjacent second anchoring piece is calculated according to formula d=S/n；According to formula h1=1/2
(D3+D-2D1) calculate the height h of the first anchoring piece1；According to formula h2=1/2 (D-D1) calculate the height of the second anchoring piece
h2。
Further, in the step 3, comprise the following steps：To the refractory casting material between adjacent high dotted line
Smooth smearing is carried out, so as to form the arcwall face of the air-guiding aisle between adjacent high dotted line；By two adjacent arcs
Smeared between face into smooth curved surface.
Further, the curve of each cross section of arcwall face and curved surface is satisfied by curvilinear equation：
Compared with prior art, insulation flue of the invention can be with by the structure of distinctive air-guiding aisle on its heat-insulation layer
The effective flowing property for improving flue gas, the air-guiding aisle make flue gas be changed into turbulence state from advection state of the prior art,
So as to while flue gas is effectively reduced in the accumulation in being incubated flue, also significantly improve the work of equipment for after-treatment
Efficiency.Further, since the insulation flue of the present invention is less to caused precipitum in the course of conveying of flue gas and conveying is more stable,
Therefore the setting of prior art middle setting chamber or ash-storing bin can be reduced, it might even be possible to cancel the setting of expansion chamber or ash-storing bin, from
And on the one hand can increase the flexibility of insulation flue arrangement, construction investment can be also on the other hand reduced, advantageously reduces and is produced into
This.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art.In all of the figs, similar element
Or part is typically identified by similar reference.In accompanying drawing, each element or part might not be drawn according to the ratio of reality.
Fig. 1 is the cross-sectional view according to the insulation flue of the present invention；
Fig. 2 is the structural representation in the case where deploying its flat presentation according to the insulation flue of the present invention；
Fig. 3 is the distribution schematic diagram according to insulation flue anchoring piece in the case where deploying its flat presentation of the present invention.
Embodiment
The embodiment of technical solution of the present invention is described in detail below in conjunction with accompanying drawing.Following examples are only used for
Clearly illustrate technical scheme, therefore be only used as example, and the protection model of the present invention can not be limited with this
Enclose.
Fig. 1 and Fig. 2 respectively illustrates the structure of the insulation flue 100 of the present invention.It is of the invention with reference to shown in Fig. 1 and Fig. 2
Flue 100 is incubated including housing 1 and forms the heat-insulation layer 2 in the inner surface of housing 1, is spaced on heat-insulation layer 2 formed with a plurality of along guarantor
The length direction of warm layer 2 through set and with twine away from air-guiding aisle 21, with cause enter insulation flue 100 in flue gas exist
Whirlwind is formed in the presence of air-guiding aisle 21, so as to reduce sedimentation of the cigarette ash in flue gas in flue 100 is incubated.
The present invention insulation flue 100 when in use, due on heat-insulation layer 2 formed with a plurality of air-guiding aisle 21, the wind-guiding
Length direction of the passage 21 along heat-insulation layer 2 is through setting and twined with certain away from so that the flue gas entered in insulation flue 100
Whirlwind is produced in the presence of air-guiding aisle 21, i.e. air-guiding aisle 21 causes length direction of the flue gas along insulation flue 100 to be formed
On the one hand cigarette ash in flue gas can be rolled and be maintained at insulation flue 100 by the wind of corkscrew motion, the spiral helicine wind
In the annular region at center, to avoid cigarette ash from covering on the inwall of heat-insulation layer 2 or subsequent processing device, on the other hand it can also make
The flowing of flue gas is more steady, to improve the conveying quality of flue gas and transfer efficiency.
As shown in Fig. 2 under the expansion its flat presentation of heat-insulation layer 2, each air-guiding aisle 21 is linear passageway, and each linear
Passage is tilted on heat-insulation layer 2 and spaced and parallel setting.By the setting, when heat-insulation layer 2 is in rolled state, each wind-guiding leads to
Road 21 is formed similarly to the structure of gun barrel bore line, so that the air-flow of flue gas forms spiral shell in the presence of each air-guiding aisle 21
The wind of shape motion is revolved, to drive the cigarette ash in flue gas stably to move ahead.
It is preferably carried out at one in mode, the inner surface of air-guiding aisle 21 can be formed as rectangle groove face.At another
It is preferably carried out in mode, as shown in figure 1, in order that entering the corkscrew motion state for the flue gas being incubated in flue 100 more
It is stable, can be by the inner surface setting camber face 211 of air-guiding aisle 21, and be formed as flat between adjacent two air-guiding aisles 21
Sliding curved surface 212.
According to the present invention, the making material of housing 1 and heat-insulation layer 2 can be with the making material of insulation flue in the prior art
It is identical.Preferably, housing 1 can be formed from steel, and heat-insulation layer 2 can be made up of refractory casting material.
In addition, the invention also provides a kind of preparation method for making above-mentioned insulation flue 100.As shown in figure 3, should
Method comprises the following steps：Step 1：The relevant parameter of heat-insulation layer 2 is obtained by calculating, the parameter comprises at least heat-insulation layer 2
Minimum thickness h, the depth b of air-guiding aisle 211, 21 number n of air-guiding aisle and twining away from S for air-guiding aisle 21；Step 2：With
In laying anchoring piece on the tabular steel plate 11 for forming housing 1, anchoring piece includes the first anchoring piece 31 and the second anchoring piece 32, the
The height of one anchoring piece 31 is more than the height of the second anchoring piece 32, the He of the first anchoring piece of gain of parameter 31 obtained according to step 1
The height and arrangement mode of second anchoring piece 32, so that proper tabular steel plate 11 is formed as the tabular (shape i.e. shown in Fig. 3
State) when, the first anchoring piece 31 and the second anchoring piece 32 are set in the first-class interleaved of same oblique line of tabular steel plate 11, and are worked as
Tabular steel plate 11 curl into for cylindrical shape when, the first anchoring piece 31 and the second anchoring piece 32 on the same oblique line
It is highly equal, so that the oblique line shape turns into the high dotted line 2111 (as shown in Figure 2) of air-guiding aisle 21；Step 3：By tabular steel plate
11 are welded, the smearing to carrying out refractory casting material between adjacent high dotted line 2111, with adjacent high dotted line 2111
Between formed with air-guiding aisle 21 heat-insulation layer 2.
By using the preparation method of the insulation flue 100 of the present invention, the heat-insulation layer 2 for being incubated flue 100 can be formed as
With necessarily twine away from air-guiding aisle 21 structure so that enter insulation flue 100 in flue gas in air-guiding aisle 21
Effect is lower to produce whirlwind, i.e. air-guiding aisle 21 causes length direction of the flue gas along insulation flue 100 to form corkscrew motion
On the one hand cigarette ash in flue gas can be rolled and be maintained at the annular space area at the center of insulation flue 100 by wind, the spiral helicine wind
In domain, to avoid cigarette ash from covering on the inwall of heat-insulation layer 2 or subsequent processing device, on the other hand it can also make the flowing of flue gas more
To be steady, to improve the conveying quality of flue gas and transfer efficiency.
Further, in step 1, comprise the following steps：The exhausted of material is poured according to the concrete condition of flue gas and fire resisting
Hot coefficient calculates the minimum thickness h of heat-insulation layer, and passes through D2=D-h obtains the mean inside diameter D of heat-insulation layer2, wherein, D is tabular steel
Internal diameter during coiled sheet song；According to formula S=150*3.14 (D2)4/ 16 calculate the twining away from S of the air-guiding aisle；According to formula b1
=D3-D1=D1/ 7, D1=2D2-D3Calculate the depth b of the air-guiding aisle1, heat-insulation layer minimum diameter D3With heat-insulation layer
Maximum inner diameter D1；According to formula n=3.14*D1/(b1* V/10) the number n of the air-guiding aisle is calculated, wherein, V is flue gas
Economic velocity, the concrete numerical value of the economic velocity determines that the concrete numerical value should be understood by used different electric furnace
For when using a certain electric furnace, it produces the flow velocity of caused flue gas under pattern the most economic.
Preferably, in step 2, the matrix form of the second anchoring piece 32 is arranged on tabular steel plate 11, wherein, any phase
The center for the rectangle that four adjacent the second anchoring pieces 32 are formed is provided with the first anchoring piece 31, to cause the first anchoring piece 31
Interleaved first-class with same oblique line of second anchoring piece 32 on tabular steel plate 11 is set.
Further, in step 2, anchored by the first anchoring piece of gain of parameter 31 and second obtained in step 1
The height of part 32 and the method for arrangement mode include：Adjacent second anchoring piece 32 is calculated according to formula b=3.14*D/20
Longitudinal pitch b, the horizontal spacing d of adjacent second anchoring piece 32 is calculated according to formula d=S/n, so as to draw the second anchor
Arrangement mode of the firmware 32 on tabular steel plate 11, because the first anchoring piece 31 is arranged on four the second anchoring pieces of arbitrary neighborhood
The center of 32 rectangles formed, therefore can also draw arrangement mode of first anchoring piece 31 on tabular steel plate 11；Meanwhile
According to formula h1=1/2 (D3+D-2D1) calculate the height h of the first anchoring piece 311；According to formula h2=1/2 (D-D1) calculate
The height h of second anchoring piece 322。
On the basis of the height of the first anchoring piece 31 and the second anchoring piece 32 and arrangement mode is determined, can continue into
Row step 3, tabular steel plate 11 is welded, and to carrying out the smearing of refractory casting material between adjacent high dotted line 2111,
To form 21 heat-insulation layers 2 with air-guiding aisle between adjacent high dotted line 2111.Preferably, in this step, in addition to
Following steps：Smooth smearing is carried out to the refractory casting material between adjacent high dotted line 2111, so that adjacent high dotted line
The arcwall face 211 of air-guiding aisle 21 is formed between 2111；It will be smeared between two adjacent arcwall faces 211 into smooth curved surface
212, so that the corkscrew motion state of the flue gas entered in insulation flue 100 is more stable.
It is further preferred that arcwall face 211 and the curve of each cross section of curved surface 212 are satisfied by curvilinear equation：
Compared with prior art, insulation knot of the flue 100 by distinctive air-guiding aisle 21 on its heat-insulation layer 2 of the invention
Structure can effectively improve the flowing property of flue gas, and the air-guiding aisle 21 makes flue gas be changed into rapid from advection state of the prior art
Stream mode, so as to while flue gas is effectively reduced in the accumulation in being incubated flue 100, also significantly improve post processing
The operating efficiency of equipment.Further, since the insulation flue 100 of the present invention is less to caused precipitum in the course of conveying of flue gas
And conveying is more stable, therefore the setting of prior art middle setting chamber or ash-storing bin can be reduced, it might even be possible to cancel expansion chamber or storage
The setting of ash silo, so as to which the flexibility that insulation flue 100 is arranged on the one hand can be increased, construction investment can be also on the other hand reduced,
Advantageously reduce production cost.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme, it all should cover among the claim of the present invention and the scope of specification.Especially, as long as in the absence of knot
Structure conflict, the every technical characteristic being previously mentioned in each embodiment can combine in any way.The present invention does not limit to
In specific embodiment disclosed herein, but all technical schemes including falling within the scope of the appended claims.
Claims (10)
1. one kind insulation flue, it is characterised in that including housing and form the heat-insulation layer in the shell inner surface, the insulation
On layer interval formed with a plurality of length direction along the heat-insulation layer through set and with twine away from air-guiding aisle, with cause into
The flue gas entered in the insulation flue forms whirlwind in the presence of the air-guiding aisle, so as to reduce the cigarette ash in flue gas in institute
State the sedimentation in insulation flue.
2. insulation flue according to claim 1, it is characterised in that under the expansion its flat presentation of the heat-insulation layer, respectively
The air-guiding aisle is linear passageway, and each linear passageway is tilted on the heat-insulation layer and spaced and parallel setting.
3. insulation flue according to claim 2, it is characterised in that the inner surface of the linear passageway is arcwall face, and
Be formed as smooth curved surface between two adjacent linear passageway.
4. insulation flue according to any one of claim 1 to 3, it is characterised in that the housing is formed from steel, described
Heat-insulation layer is made up of refractory casting material.
5. a kind of preparation method for being used to make insulation flue according to any one of claim 1 to 4, its feature exist
In comprising the following steps：
Step 1：The relevant parameter of heat-insulation layer is obtained by calculating, the parameter comprises at least the minimum thickness of heat-insulation layer, wind-guiding
The depth of passage, the number of air-guiding aisle and air-guiding aisle twine away from；
Step 2：Anchoring piece is laid on the tabular steel plate for forming the housing, the anchoring piece includes the first anchoring
Part and the second anchoring piece, the height of first anchoring piece are more than the height of second anchoring piece, obtained according to step 1
The height and arrangement mode of the anchoring piece of gain of parameter first and the second anchoring piece, so that the proper tabular steel plate is formed as flat
During tabular, first anchoring piece and the second anchoring piece are set in the first-class interleaved of same oblique line of the tabular steel plate,
And when the tabular steel plate curl shape turns into cylindric, first anchoring piece and the second anchor on the same oblique line
The height of firmware is equal, so that the oblique line shape turns into the high dotted line of air-guiding aisle；
Step 3：The tabular steel plate is welded, the smearing to carrying out refractory casting material between adjacent high dotted line, with
The heat-insulation layer with the air-guiding aisle is formed between adjacent high dotted line.
6. preparation method according to claim 5, it is characterised in that in the step 1, comprise the following steps：
The adiabatic coefficent that material is poured according to the concrete condition of flue gas and fire resisting calculates the minimum thickness h of heat-insulation layer, and passes through D2=
D-h obtains the mean inside diameter D of heat-insulation layer2, wherein, D is internal diameter when tabular steel plate crimps；
According to formula S=150*3.14 (D2)4/ 16 calculate the twining away from S of the air-guiding aisle；
According to formula b1=D3-D1=D1/ 7, D1=2D2-D3Calculate the depth b of the air-guiding aisle1, heat-insulation layer minimum in
Footpath D3With the maximum inner diameter D of heat-insulation layer1；
According to formula n=3.14*D1/(b1* V/10) the number n of the air-guiding aisle is calculated, wherein, V is the economic stream of flue gas
Speed.
7. preparation method according to claim 6, it is characterised in that in step 2, by the second anchoring piece matrix
Formula is arranged on the tabular steel plate, wherein, the center of the rectangle of four the second anchoring pieces formation of arbitrary neighborhood is set
There is the first anchoring piece, to cause first anchoring piece and same oblique line of second anchoring piece on the tabular steel plate
First-class interleaved is set.
8. preparation method according to claim 7, it is characterised in that in the step 2, by being obtained in step 1
The anchoring piece of gain of parameter first and the height of the second anchoring piece and the method for arrangement mode include：
The horizontal spacing b of adjacent second anchoring piece is calculated according to formula b=3.14*D/20；
The longitudinal pitch d of adjacent second anchoring piece is calculated according to formula d=S/n；
According to formula h1=1/2 (D3+D-2D1) calculate the height h of the first anchoring piece1；
According to formula h2=1/2 (D-D1) calculate the height h of the second anchoring piece2。
9. preparation method according to claim 8, it is characterised in that in the step 3, comprise the following steps：
Smooth smearing is carried out to the refractory casting material between adjacent high dotted line, so as to form institute between adjacent high dotted line
State the arcwall face of air-guiding aisle；
It will be smeared between two adjacent arcwall faces into smooth curved surface.
10. preparation method according to claim 9, it is characterised in that each cross section of the arcwall face and the curved surface
Curve be satisfied by curvilinear equation：
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906811.1A CN107702123B (en) | 2017-09-29 | 2017-09-29 | The production method for keeping the temperature flue and keeping the temperature flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906811.1A CN107702123B (en) | 2017-09-29 | 2017-09-29 | The production method for keeping the temperature flue and keeping the temperature flue |
Publications (2)
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| CN107702123A true CN107702123A (en) | 2018-02-16 |
| CN107702123B CN107702123B (en) | 2019-07-05 |
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ID=61175607
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| Application Number | Title | Priority Date | Filing Date |
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| RU2111414C1 (en) * | 1996-04-05 | 1998-05-20 | Курский государственный технический университет | Chimney stack cleaner |
| CN202176144U (en) * | 2011-06-22 | 2012-03-28 | 郑德明 | Internal hearth helical line structure of non-corrosion dust-collection energy-saving chimney |
| CN102418933A (en) * | 2012-01-16 | 2012-04-18 | 常熹钰 | Corrosion-resistant chimney with cylinder wall heating device |
| CN102444309A (en) * | 2011-09-19 | 2012-05-09 | 郑德明 | Non-corrosive dust-collecting and energy-saving chimney |
| CN202253694U (en) * | 2011-09-09 | 2012-05-30 | 郑德明 | Energy-saving chimney without corrosion dust |
| CN102563679A (en) * | 2011-07-15 | 2012-07-11 | 中环华创(北京)科技发展有限公司 | Flue gas guide device |
| CN203687068U (en) * | 2014-02-26 | 2014-07-02 | 黑龙江省华能电力技术有限公司 | Anti-abrasive and self-insulation high temperature furnace gas pipeline |
| CN104949562A (en) * | 2015-06-29 | 2015-09-30 | 西安华广电站锅炉有限公司 | Inner and outer double-rifle pipe |
-
2017
- 2017-09-29 CN CN201710906811.1A patent/CN107702123B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2111414C1 (en) * | 1996-04-05 | 1998-05-20 | Курский государственный технический университет | Chimney stack cleaner |
| CN202176144U (en) * | 2011-06-22 | 2012-03-28 | 郑德明 | Internal hearth helical line structure of non-corrosion dust-collection energy-saving chimney |
| CN102563679A (en) * | 2011-07-15 | 2012-07-11 | 中环华创(北京)科技发展有限公司 | Flue gas guide device |
| CN202253694U (en) * | 2011-09-09 | 2012-05-30 | 郑德明 | Energy-saving chimney without corrosion dust |
| CN102444309A (en) * | 2011-09-19 | 2012-05-09 | 郑德明 | Non-corrosive dust-collecting and energy-saving chimney |
| CN102418933A (en) * | 2012-01-16 | 2012-04-18 | 常熹钰 | Corrosion-resistant chimney with cylinder wall heating device |
| CN203687068U (en) * | 2014-02-26 | 2014-07-02 | 黑龙江省华能电力技术有限公司 | Anti-abrasive and self-insulation high temperature furnace gas pipeline |
| CN104949562A (en) * | 2015-06-29 | 2015-09-30 | 西安华广电站锅炉有限公司 | Inner and outer double-rifle pipe |
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| Publication number | Publication date |
|---|---|
| CN107702123B (en) | 2019-07-05 |
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