CN107702123B - The production method for keeping the temperature flue and keeping the temperature flue - Google Patents
The production method for keeping the temperature flue and keeping the temperature flue Download PDFInfo
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- CN107702123B CN107702123B CN201710906811.1A CN201710906811A CN107702123B CN 107702123 B CN107702123 B CN 107702123B CN 201710906811 A CN201710906811 A CN 201710906811A CN 107702123 B CN107702123 B CN 107702123B
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- anchoring piece
- insulating layer
- flue
- heat preservation
- 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 fields, specifically disclose a kind of heat preservation flue and a kind of production method for keeping the temperature flue.The heat preservation flue includes shell and the insulating layer for being formed in shell inner surface, on insulating layer interval be formed with a plurality of length direction along insulating layer through setting and have twine away from air-guiding aisle, so that the flue gas entered in heat preservation flue forms whirlwind under the action of air-guiding aisle, to reduce sedimentation of the cigarette ash in heat preservation flue in flue gas.Heat preservation flue of the invention greatly reduces accumulation of the cigarette ash in flue gas in heat preservation flue, to effectively improve the working efficiency of heat preservation flue and equipment for after-treatment.
Description
Technical field
The present invention relates to electric furnace smelting fields, and in particular to a kind of heat preservation flue and a kind of production method for keeping the temperature flue.
Background technique
Flue is a kind of link burner hearth and equipment for after-treatment, carries the component of flue gas.It is used in present industrial design and construction
Large-scale flue be broadly divided into brick and be blended flue and two kinds of steel flue.But no matter use which kind of flue, inner wall surface compared with
Cause smoke settlement rate high so that flue gas is simple in flow regime wherein for smooth and opposing straight.In consideration of it, existing
Flue in, inevitably need to be arranged large-scale expansion chamber or ash-storing bin in flue long distance delivery.Not only increase in this way
Add investment and occupied area, more severely impacts the flexibility of flue arrangement.
In addition, the flue gas of various operating condition complexity, such as ash content weight, temperature height or property can be encountered in large scale industry production
The viscous flue gas of matter, after these flue gases enter flue, be easily attached to the inner wall surface of flue, equipment for after-treatment heat-transfer surface with
And on radiating surface, this has just greatly affected the transfer efficiency of flue gas, while also increasing 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, to be effectively improved the flue of the working efficiency of equipment for after-treatment.
Summary of the invention
In order to reduce the flue gas accumulation in heat preservation flue, to be effectively improved the work of heat preservation flue and equipment for after-treatment
Efficiency, the invention proposes a kind of heat preservation flues.
Heat preservation flue according to the present invention is spaced on insulating layer including shell and the insulating layer for being formed in shell inner surface
Be formed with a plurality of length direction along insulating layer through setting and have twine away from air-guiding aisle so that enter heat preservation flue in
Flue gas form whirlwind under the action of air-guiding aisle, to reduce the sedimentation of cigarette ash in flue gas in heat preservation flue.
Further, under the expansion tiled state of insulating layer, each air-guiding aisle is linear passageway, and each linear passageway
Inclination and spaced and parallel setting on insulating layer.
Further, the inner surface of linear passageway is arcwall face, and is formed as smooth between two adjacent linear passageway
Curved surface.
Further, shell is formed from steel, and insulating layer is made of refractory casting material.
The invention also provides a kind of production methods for making above-mentioned heat preservation flue, comprising the following steps: step 1:
By calculate obtain insulating layer relevant parameter, the parameter include at least insulating 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 plate steel plate for being used to form the shell
Firmware, the anchoring piece include the first anchoring piece and the second anchoring piece, and the height of first anchoring piece is greater than second anchor
The height of firmware, the height and arrangement mode of the first anchoring piece of gain of parameter and the second anchoring piece that are obtained according to step 1,
So that first anchoring piece and the second anchoring piece are in the plate steel plate when the plate steel plate is formed as tabular
Interleaveds are arranged on same oblique line etc., and when the plate steel plate curl shape becomes cylindric, it is oblique to be located at the same
First anchoring piece on line is equal with the height of the second anchoring piece, so that the oblique line shape becomes the high dotted line of air-guiding aisle；
Step 3: the plate steel plate is welded, to the smearing for carrying out refractory casting material between adjacent high dotted line, in phase
The insulating layer with the air-guiding aisle is formed between adjacent high dotted line.
Further, in step 1, comprising the following steps: pour the exhausted of material according to the concrete condition of flue gas and fire resisting
Hot coefficient calculates the minimum thickness h of insulating layer, and passes through D2=D-h obtains the mean inside diameter D of insulating layer2, wherein D is plate steel
Internal diameter when 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, insulating layer minimum diameter D3With insulating layer
Maximum inner diameter D1；According to formula n=3.14*D1/(b1* V/10) calculate the number n of the air-guiding aisle, wherein and V is flue gas
Economic velocity.
Further, in step 2, the second anchoring piece matrix form is arranged on the plate 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, so that first anchor
Firmware and second anchoring piece interleaveds such as on the same oblique line on the plate steel plate are arranged.
Further, in the step 2, pass through the first anchoring piece of gain of parameter obtained in step 1 and the second anchor
The height of firmware and the method for arrangement mode include: to calculate adjacent second anchoring piece 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, comprising 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
It smears between face into smooth curved surface.
Further, the curve of each cross section of arcwall face and curved surface is all satisfied curvilinear equation:
Compared with prior art, heat preservation flue of the invention can be with by the structure of distinctive air-guiding aisle on its insulating layer
The effective flowing property for improving flue gas, the air-guiding aisle make flue gas become turbulence state from advection state in the prior art,
To effectively reduce flue gas while keeping the temperature the accumulation in flue, the work of equipment for after-treatment is also significantly improved
Efficiency.Further, since heat preservation flue of the invention is less to the sediment generated in the transmission process 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 the setting for cancelling expansion chamber or ash-storing bin, from
And on the one hand can increase the flexibility of heat preservation flue arrangement, construction investment can be also on the other hand reduced, advantageously reduces and is produced into
This.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the cross-sectional view of heat preservation flue according to the present invention；
Fig. 2 is heat preservation flue according to the present invention in the structural schematic diagram being unfolded under tiled state；
Fig. 3 is the distribution schematic diagram of heat preservation flue anchoring piece in the case where tiled state is unfolded according to the present invention.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
Fig. 1 and Fig. 2 respectively illustrates the structure of heat preservation flue 100 of the invention.Referring to figs. 1 and 2, of the invention
Heat preservation flue 100 includes shell 1 and the insulating layer 2 for being formed in 1 inner surface of shell, and interval is formed with a plurality of edge and protects on insulating layer 2
The length direction of warm layer 2 through setting and have twine away from air-guiding aisle 21 so that enter heat preservation flue 100 in flue gas exist
Whirlwind is formed under the action of air-guiding aisle 21, to reduce sedimentation of the cigarette ash in heat preservation flue 100 in flue gas.
Heat preservation flue 100 of the invention when in use, due to being formed with a plurality of air-guiding aisle 21, the wind-guiding on insulating layer 2
Channel 21 through setting and has certain twine away from so that entering the flue gas in heat preservation flue 100 along the length direction of insulating layer 2
Whirlwind is generated under the action of air-guiding aisle 21, that is, air-guiding aisle 21 forms flue gas along the length direction of heat preservation flue 100
On the one hand cigarette ash in flue gas can be rolled and be maintained at heat preservation flue 100 by the wind of corkscrew motion, the spiral helicine wind
It in the annular region at center, covers on the inner wall of insulating layer 2 or subsequent processing device to avoid cigarette ash, on the other hand can also make
The flowing of flue gas is more steady, to improve the conveying quality and transfer efficiency of flue gas.
As shown in Fig. 2, each air-guiding aisle 21 is linear passageway, and each linear under the expansion tiled state of insulating layer 2
Channel tilts on insulating layer 2 and spaced and parallel setting.By the setting, when insulating layer 2 is in rolled state, each wind-guiding is logical
Road 21 is formed similarly to the structure of gun barrel bore line, so that the air-flow of flue gas be made to form spiral shell under the action of each air-guiding aisle 21
The wind of shape movement is revolved, to drive the cigarette ash in flue gas steadily to move ahead.
In a preferred embodiment, 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 to make the corkscrew motion state of the flue gas entered in heat preservation flue 100 more
Stablize, the inner surface of air-guiding aisle 21 can be arranged to arcwall face 211, and be formed as flat between two adjacent air-guiding aisles 21
Sliding curved surface 212.
According to the present invention, the making material of shell 1 and insulating layer 2 can be with the making material of heat preservation flue in the prior art
It is identical.Preferably, shell 1 can be formed from steel, and insulating layer 2 can be made of refractory casting material.
In addition, the invention also provides a kind of production methods for making above-mentioned heat preservation flue 100.As shown in figure 3, should
Method is the following steps are included: step 1: the relevant parameter of insulating layer 2 is obtained by calculating, which includes at least insulating layer 2
Minimum thickness h, the depth b of air-guiding aisle 211, 21 several n of air-guiding aisle and twining away from S for air-guiding aisle 21；Step 2: with
In being laid with anchoring piece on the plate steel plate 11 for forming shell 1, anchoring piece includes the first anchoring piece 31 and the second anchoring piece 32, the
The height of one anchoring piece 31 is greater than the height of the second anchoring piece 32,31 He of the first anchoring piece of gain of parameter obtained according to step 1
The height and arrangement mode of second anchoring piece 32, so that when plate steel plate 11 is formed as tabular (shape i.e. shown in Fig. 3
State) when, the first anchoring piece 31 and the second anchoring piece 32 interleaveds such as on the same oblique line of plate steel plate 11 are arranged, and work as
When plate steel plate 11 curls into as cylindrical shape, 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 becomes the high dotted line 2111 (as shown in Figure 2) of air-guiding aisle 21；Step 3: by plate steel plate
11 are welded, to the smearing for carrying out refractory casting material between adjacent high dotted line 2111, in adjacent high dotted line 2111
Between formed have air-guiding aisle 21 insulating layer 2.
By using the production method of heat preservation flue 100 of the invention, the insulating layer 2 for keeping the temperature flue 100 can be formed as
With centainly twine away from air-guiding aisle 21 structure so that enter heat preservation flue 100 in flue gas in air-guiding aisle 21
Effect is lower to generate whirlwind, that is, air-guiding aisle 21 makes flue gas form corkscrew motion along the length direction of heat preservation flue 100
On the one hand the annular space area at the center of heat preservation flue 100 can be rolled and be maintained to cigarette ash in flue gas by wind, the spiral helicine wind
It in domain, is covered on the inner wall of insulating layer 2 or subsequent processing device to avoid cigarette ash, on the other hand can also make the flowing of flue gas more
To be steady, to improve the conveying quality and transfer efficiency of flue gas.
Further, in step 1, comprising the following steps: pour the exhausted of material according to the concrete condition of flue gas and fire resisting
Hot coefficient calculates the minimum thickness h of insulating layer, and passes through D2=D-h obtains the mean inside diameter D of insulating layer2, wherein D is plate steel
Internal diameter when 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, insulating layer minimum diameter D3With insulating layer
Maximum inner diameter D1；According to formula n=3.14*D1/(b1* V/10) calculate the number n of the air-guiding aisle, wherein and V is flue gas
Economic velocity, the specific value of the economic velocity determines that the specific value should understand that by used different electric furnace
To produce the flow velocity of the flue gas generated under mode the most economic when using a certain electric furnace.
Preferably, in step 2,32 matrix form of the second anchoring piece is arranged on plate 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, so that the first anchoring piece 31
Interleaveds are arranged on the same oblique line on plate steel plate 11 etc. with the second anchoring piece 32.
Further, it in step 2, is anchored by the first anchoring piece of gain of parameter 31 obtained in step 1 and second
The height of part 32 and the method for arrangement mode include: to calculate adjacent second anchoring piece 32 according to formula b=3.14*D/20
Longitudinal pitch b calculates the horizontal spacing d of adjacent second anchoring piece 32 according to formula d=S/n, so as to obtain the second anchor
Arrangement mode of the firmware 32 on plate steel plate 11, since four the second anchoring pieces of arbitrary neighborhood are arranged in the first anchoring piece 31
The center of 32 rectangles formed, therefore can also obtain arrangement mode of first anchoring piece 31 on plate 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 determining the height and arrangement mode of the first anchoring piece 31 and the second anchoring piece 32, can continue into
Plate steel plate 11 is welded by row step 3, and between adjacent high dotted line 2111 carry out refractory casting material smearing,
To form 21 insulating layers 2 with air-guiding aisle between adjacent high dotted line 2111.Preferably, in this step, further include
Following steps: carrying out smooth smearing 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 smear between two adjacent arcwall faces 211 into smooth curved surface
212, so that the corkscrew motion state for entering the flue gas in heat preservation flue 100 is more stable.
It is further preferred that the curve of each cross section of arcwall face 211 and curved surface 212 is all satisfied curvilinear equation:
Compared with prior art, the knot that heat preservation flue 100 of the invention passes through distinctive air-guiding aisle 21 on its insulating layer 2
Structure can effectively improve the flowing property of flue gas, which makes flue gas become rapid from advection state in the prior art
Stream mode, to also significantly improve post-processing effectively reducing flue gas while keeping the temperature the accumulation in flue 100
The working efficiency of equipment.Further, since heat preservation flue 100 of the invention is less to the sediment generated in the transmission process of flue gas
And conveying is more stable, therefore can reduce the setting of prior art middle setting chamber or ash-storing bin, it might even be possible to cancel expansion chamber or storage
On the other hand the setting of ash cellar can also reduce construction investment so that the flexibility that heat preservation flue 100 is arranged on the one hand can be increased,
Advantageously reduce production cost.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.Especially, as long as there is no knots
Structure conflict, items technical characteristic mentioned in the various embodiments can be combined in any way.The present invention does not limit to
In specific embodiment disclosed herein, but include all technical solutions falling within the scope of the claims.
Claims (9)
1. a kind of heat preservation flue, which is characterized in that including shell and the insulating layer for being formed in the shell inner surface, the heat preservation
On layer interval be formed with a plurality of length direction along the insulating layer through setting and have twine away from air-guiding aisle so that into
The flue gas entered in the heat preservation flue forms whirlwind under the action of the air-guiding aisle, to reduce cigarette ash in flue gas in institute
State the sedimentation in heat preservation flue；
The shell is formed from steel, and the insulating layer is made of refractory casting material；
The air-guiding aisle is twined away from S by formula S=150*3.14 (D2)4/ 16 obtain, D2For the mean inside diameter of the insulating layer；
Wherein, the mean inside diameter D of the insulating layer2By formula D2=D-h show that D is the internal diameter of the shell, and h is the heat preservation
The minimum thickness of layer, the minimum thickness h of the insulating layer pour the adiabatic coefficent of material according to the concrete condition and fire resisting of flue gas
It is calculated.
2. heat preservation flue according to claim 1, which is characterized in that under the expansion tiled state of the insulating layer, respectively
The air-guiding aisle is linear passageway, and each linear passageway tilts on the insulating layer and spaced and parallel setting.
3. heat preservation flue according to claim 2, which is characterized 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. a kind of production method for making heat preservation flue according to any one of claim 1 to 3, feature exist
In, comprising the following steps:
Step 1: obtaining the relevant parameter of insulating layer by calculating, and the parameter includes at least the minimum thickness of insulating layer, wind-guiding
The depth in channel, the number of air-guiding aisle and air-guiding aisle twine away from；
Step 2: being laid with anchoring piece on the plate steel plate for being used to form the shell, and the anchoring piece includes the first anchoring
Part and the second anchoring piece, the height of first anchoring piece are greater than the height of second anchoring piece, are obtained according to step 1
The height and arrangement mode of the first anchoring piece of gain of parameter and the second anchoring piece, so that when the plate steel plate is formed as flat
When plate, first anchoring piece and the second anchoring piece interleaveds such as on the same oblique line of the plate steel plate are arranged,
And when the plate steel plate curl shape becomes 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 becomes the high dotted line of air-guiding aisle；
Step 3: the plate steel plate is welded, between adjacent high dotted line carry out refractory casting material smearing, with
The insulating layer with the air-guiding aisle is formed between adjacent high dotted line.
5. production method according to claim 4, which is characterized in that in said step 1, comprising the following steps:
The minimum thickness h of insulating layer is calculated according to the adiabatic coefficent that the concrete condition of flue gas and fire resisting pour material, and passes through D2=
D-h obtains the mean inside diameter D of insulating layer2, wherein D is internal diameter when plate 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, insulating layer minimum in
Diameter D3With the maximum inner diameter D of insulating layer1；
According to formula n=3.14*D1/(b1* V/10) calculate the number n of the air-guiding aisle, wherein and V is the economic stream of flue gas
Speed.
6. production method according to claim 5, which is characterized in that in step 2, by the second anchoring piece matrix
Formula is arranged on the plate steel plate, wherein the center setting for the rectangle that four the second anchoring pieces of arbitrary neighborhood are formed
There is the first anchoring piece, so that first anchoring piece and same oblique line of second anchoring piece on the plate steel plate
First-class interleaved setting.
7. production method according to claim 6, which is characterized in that in the step 2, by being obtained in step 1
The first anchoring piece of gain of parameter 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。
8. production method according to claim 7, which is characterized in that in the step 3, comprising 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 smear between two adjacent arcwall faces into smooth curved surface.
9. production method according to claim 8, which is characterized in that each cross section of the arcwall face and the curved surface
Curve is all satisfied curvilinear equation:
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| CN201710906811.1A CN107702123B (en) | 2017-09-29 | 2017-09-29 | The production method for keeping the temperature flue and keeping the temperature flue |
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| 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 |
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| CN107702123B true CN107702123B (en) | 2019-07-05 |
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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 |
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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 |
|---|---|
| CN107702123A (en) | 2018-02-16 |
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