CN102486064A - Corrosion-free energy saving chimney - Google Patents
Corrosion-free energy saving chimney Download PDFInfo
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- CN102486064A CN102486064A CN2011101996726A CN201110199672A CN102486064A CN 102486064 A CN102486064 A CN 102486064A CN 2011101996726 A CN2011101996726 A CN 2011101996726A CN 201110199672 A CN201110199672 A CN 201110199672A CN 102486064 A CN102486064 A CN 102486064A
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Abstract
The invention discloses a corrosion-free energy saving chimney. The chimney comprises a chimney tube (1), a flue (2) and a spiral smoke guide line (3), wherein the spiral smoke guide line (3) is arranged on a liner (1a) of the chimney tube; a smoke inlet (10) is arranged at the lower end of the chimney tube; one end of the flue is connected at the smoke inlet (10) and is communicated with the interior of the chimney tube (1) via the smoke inlet (10); the spiral smoke guide line (3) is formed by stacking a plurality of building blocks (4) with guide parts (41); and the guide part (41) of each building block (4) is provided with a smooth slope (41a), so that the slopes (41a) of all the building blocks (4) stacked together are smoothly connected, thus forming a guide surface (31) for the smoke to rise in a rotary manner. The chimney has the following beneficial effects that: the energy consumption of the draught fan can be reduced by about 20%, thus being beneficial to saving energy; meanwhile, the problem of corrosion of the inner tube and outer wall of the wet chimney after desulfurization can be thoroughly solved; and compared with the existing chimneys, the chimney has obvious energy saving and environmental protection effects and lower manufacturing cost.
Description
Technical field
The present invention relates to a kind of chimney, relating in particular to a kind of no rotten knot can chimney.
Background technology
In recent years, along with the steady enforcement of national environmental protection policy and the enhancing of popular environmental consciousness, the operation of industry flue gas desulphurization systems such as domestic electric power, metallurgy, chemical industry has got into normalization and standardization.The general enterprise of discharging fume adopts flue gas wet desulphurization process, and this technology is high to the SO2 removal efficiency in the flue gas, and is about more than 95%, but not high to the main component SO3 removal efficiency of flue gas corrosion, and about about 20%.About 40 ℃-50 ℃ of flue-gas temperature after the wet desulphurization, flue gas is saturated, and water content is high, high humidity, temperature is low, and flue gas is in the condensation and dewfall state.Flue gas in the conventional chimney is operation under positive pressure, and the flue gas after the wet desulphurization processing generally also contains strong corrosive materials such as fluoride and chloride.Therefore; Chimney behind the smoke-gas wet desulfurization is because the influence of condensation and dewfall and flue gas operation under positive pressure; Flue gas environment (low temperature, high humidity, strong corrosive material etc.) further aggravates the chimney corrosion condition, and chimney emission inner core corrosion leakage example increases gradually, and has formed trend.
Wet chimney behind the existing chimney, particularly wet desulphurization, its flue is got into chimney barrel or is got into chimney barrel with the mode of tangent line by the tube core line of chimney, and its flue all is the level of state with ground, no vertical angle degree.
Flue is got into the chimney of chimney barrel by the tube core line level of chimney; Flue gas flow field is disorderly in the cylindrical shell, and flue gas rising resistance is big, and strong corrosive materials such as the condensation acid solution in the wet flue gas are dirty along inner wall of stack; And most of chimneys are the operation under positive pressure state; So very easily cause wet flue gas corrosion liner, cause the liner corrosion to come off and perforation, cylindrical shell breaks;
Flue gets into the chimney of chimney barrel with the mode level of tangent line; Purpose is that the flue gas stream that gets into behind the cylindrical shell is rotated in cylindrical shell; Be gathered in the axis area in the cylindrical shell so that the material of severe corrosives such as condensed water particle inhales volume, be used to solve the etching problem of chimney.But the flue of this form; Flue gas stream can obliquely blow to after tangential admission rotates a circle on the firm gas of having come in from entering the mouth greatly; The air inlet that causes entering the mouth is partial to barrel and is produced compression phenomena; Wall place flow velocity is increased; Wall friction power increases, and causes that the pressure loss increases, flue gas rising resistance increases and flue gas flow field is disorderly, so just can not reduce chimney running cost, not energy-conservation and can not solve the corrosion that the strong corrosive materials such as condensation acid solution in the wet flue gas cause chimney lining and cylindrical shell effectively.
Other has prior art that spiral rifling structure is set on the chimney lining wall, and the flue gas stream that acts on rising carries out water conservancy diversion, promotes the flue gas rotation around moving and produce central negative pressure; But this spiral rifling structure is by the building block on barrel of encorbelmenting stacked the forming that misplace up and down, and as shown in Figure 9, it is concavo-convex to be ladder up and down between the masonry; Building block cross section and rough surface out-of-flatness; There is very big resistance in flue gas to rising, has increased the energy consumption of air-introduced machine, can not reach effective water conservancy diversion effect; And; The up-wards inclination angle of helix realizes through the translation fissure of displacement between the stacked up and down building block in the work progress; Its degree of accuracy of angle of inclination more is difficult to control for the desired helix of design drawing; Very easily cause the deviation of the whole angle of helix, difficulty of construction is big, and construction technology is bad control; In order to overcome the concavo-convex and rough surface out-of-flatness of ladder between its masonry; And adopt the acid proof cement mortar with it with concavo-convex floating; But after actual condition moved very short a period of time down, the flue gas stream that the mortar on surface is just risen washed away and comes off, and can not arrive the effect of effecting a permanent cure; In addition; Its building block length of encorbelmenting on inner wall of stack of spiral rifling structure of prior art is single; Flue gas was risen to the epimere portion (clivia in the cylindrical shell is than the stage) of chimney barrel by the bottom after, because institute's cross section taken in correspondence diameter reduces, but the minister's degree of encorbelmenting that stretches out the chimney lining wall did not reduce; Cause flue gas stream can not play effective water conservancy diversion effect to rising; Increase the resistance that flue gas rises on the contrary, be prone to cause the desulfurization wet flue gas to wash away the annular brace platform with corrosion penetration cylindrical shell liner and chimney barrel, can not fundamentally not solve the wet etching problem of chimney of desulfurization.
Summary of the invention
The object of the invention is exactly in order to overcome the deficiency that above-mentioned prior art exists; A kind of no rotten knot ability chimney is provided; Being arranged on the inner flue gas channelizing line of chimney is formed by the building block bond of the diversion division with smooth bevel; Channelizing line has smooth guide face, and the technology of the construction of channelizing line is simple, and the block structure design is ingenious.
For realizing above-mentioned purpose of the present invention, following technical scheme is provided:
A kind of no rotten knot ability chimney, comprising: chimney barrel, its liner are provided with spiral flue gas channelizing line, and its lower end is provided with into mouth; Flue, one of which end are connected into and communicate with chimney barrel inside through advancing mouth on the mouth; Said spiral flue gas channelizing line is formed by the building block bond that polylith has diversion division; The diversion division of each building block has smooth inclined-plane; Make and the inclined-plane smooth connection of bond all building blocks together be used for making flue gas to be the guide face of rotary rising thereby form.
Wherein, Flue is angle of elevation alpha and advances mouth and be connected with said before getting into chimney barrel; And a side inwall of said flue is connected with the liner inwall of said chimney barrel is tangent and smooth, makes flue gas tangentially tilt up to get into chimney barrel inside via said flue.
Wherein, building block comprises the body of block at said chimney barrel liner, and said diversion division is stretched out the liner of said chimney barrel by an end face level of said body.
Particularly; Diversion division is a cylinder, and the relative bottom surface of the end face of said cylinder is moved to a lateral deviation of said body, makes the side of said cylinder form said inclined-plane; And make that the bus of said cylinder is parallel with the said end face of said body, with the said side formation angle β of said body.
A said building block is stacked in another said building block; And make the bottom surface of diversion division of a said building block overlap with the end face of the diversion division of said another building block; Thereby make the said inclined-plane smooth connection of all building blocks, form and saidly be used for making flue gas to be the guide face of rotary rising.
Particularly, to stretch out the length of said chimney barrel inwall be the 0.5%-1.5% of correspondence position chimney barrel internal diameter to diversion division.
Particularly, the bottom of spiral flue gas channelizing line and saidly advance between the mouth to form distance.
Particularly, form distance between the top of spiral flue gas channelizing line and the said chimney barrel top.
Particularly, the inclined-plane is a curved surface, and the end face of said cylinder and bottom surface are a circle or an oval part.
Particularly, 0 °＜α≤45 °, 15 °≤β≤75 °.
Operating principle of the present invention is: the intake method that changes traditional chimney is an elevation angle tangential admission mode, and inner wall of stack is provided with spiral flue gas channelizing line, makes flue gas enter atmosphere in rotary manner.Centrifugal force, central negative pressure and fluid dynamic energy high concentration and the metastable whirlpool structure of utilizing the rotation flow of flue gas to produce; Cause condensation water smoke to be inhaled volume and be gathered in chimney axis area, plume three kinds of effects that solid particles further separates in higher lifting ability and the flue gas are arranged, reach not triple targets such as burn into reduction air-introduced machine energy consumption and the further dedusting of flue gas of inner wall of stack.
Beneficial effect of the present invention embodies in the following areas:
1, spiral flue gas channelizing line is formed by the building block bond with diversion division; And diversion division has smooth bevel, makes the inclined-plane smooth connection of a plurality of building blocks constitute flue gas channelizing line, channelizing line smooth surface; Can effectively carry out regular rotation around moving and elevator for the flow of flue gas that rises; Thereby promote and strengthen the suction volume effect of central negative pressure, plume rigidity is big simultaneously, the lifting resistance is little, helps energy-conservation;
2, the bottom surface of the diversion division through will going up a building block overlaps with the end face of the diversion division of next building block and can realize easily just being connected of building block up and down that the channelizing line angle of inclination of formation is accurate, and the channelizing line construction manipulation process is convenient and simple;
3, the diversion division length of stretching out the chimney barrel liner according to the chimney diameter reduce shorten; And the number of channelizing line is along the rising of chimney height and reduce; The bottom distance of channelizing line is advanced mouth one segment distance; The top of channelizing line is apart from top one segment distance of chimney, thereby plays rational water conservancy diversion effect and reduced the resistance that flue gas rises;
4, flue has been gathered the two-fold advantage of elevation angle air inlet and tangential admission; Flue is the elevation angle and is connected with chimney barrel; Flow of flue gas is smooth and easy, and loss in head is little, made full use of chimney itself from characteristics such as drafts; Improve initial velocity and power that flue gas rises, more helped reducing the energy consumption of air-introduced machine; One side inwall of flue is connected with the liner inwall of said chimney barrel is tangent and smooth; Make flue gas tangentially tilt up to get into chimney barrel inside via said flue; After flue gas gets into chimney barrel, be identical rotation direction, regular rotation smoke evacuation, vortex is controlled whole smoke evacuation process; Make the material of the severe corrosives such as condensed water particle in the flue gas swept across the axis area that is gathered in the cylindrical shell, thereby thoroughly solve the etching problem of inner wall of stack.
Description of drawings
Fig. 1 is the overall structure sketch map of no rotten knot ability chimney of the present invention;
The master that Fig. 2 builds on the chimney barrel liner for building block looks sketch map;
Fig. 3 is the perspective view of building block of the present invention;
Fig. 3 a is that the master of building block of the present invention looks sketch map;
Fig. 3 b is the schematic top plan view of building block among Fig. 3 a;
Fig. 3 c is that sketch map is looked on the right side of building block among Fig. 3 a;
Fig. 4 a is that the master together the time looks sketch map with a plurality of building block bonds;
Fig. 4 b is the vertical view of Fig. 4 a;
Fig. 5 a is that the master together the time looks sketch map with the building block bond of a plurality of another form of structure;
Fig. 5 b is the vertical view of Fig. 5 a;
Fig. 6 is the schematic top plan view that building block is connected with the chimney barrel liner;
Fig. 7 is the another kind of structural representation of building block of the present invention;
Fig. 8 is the schematic top plan view that flue is connected with the chimney barrel liner;
Fig. 9 is the structural representation of prior art channelizing line.
Description of reference numerals: 1-chimney barrel; The 1a-liner; 10-advances mouth; The 2-flue; The spiral flue gas channelizing line of 3-; The 31-guide face; The 4-building block; The 40-body; The 41-diversion division; The 41a-inclined-plane; The 41b-end face; The 41c-bottom surface.
The specific embodiment
Shown in the overall structure sketch map of Fig. 1 no rotten knot ability chimney of the present invention, no rotten knot of the present invention can comprise chimney barrel 1 by chimney, and its liner 1a is provided with spiral flue gas channelizing line 3, and its lower end barrel is provided with into mouth 10; Flue 2, one of which end are connected on the mouth 10, communicate with chimney barrel inside through advancing mouth 10; Wherein, Spiral flue gas channelizing line 3 is formed by building block 4 bonds that polylith has diversion division 41; As shown in Figure 2; The diversion division 41 of each building block 4 has smooth inclined-plane 41a to make and the inclined-plane smooth connection of bond all building blocks together is used for making flue gas to be the guide face 31 of rotary rising thereby form.
As shown in Figure 2; Spiral flue gas channelizing line 3 of the present invention is formed by a plurality of building block 4 bonds; Building block 4 of the present invention comprises and is used for building the body 40 at chimney barrel 1 liner 1a; Shown in Fig. 3,3a, 3b, 3c, diversion division 41 forms integral body with body 40, and diversion division 41 stretches out (like Fig. 3 b, shown in Figure 7) forward by an end face level of body 40; When building on the liner 1a of chimney barrel with the body 40 of convenient building block 4, the liner 1a (as shown in Figure 6) that diversion division 41 is encorbelmented and stretched out chimney barrel 1 to chimney barrel 1 inside.Diversion division 41 of the present invention is a cylinder; The end face 41b of cylinder and bottom surface 41c are equal-sized horizontal plane; And the end face 41b of cylinder and bottom surface 41c are positioned at same horizontal plane with the end face and the bottom surface of body 40 respectively, and the relative bottom surface 41c of the end face 41b of cylinder moves to a lateral deviation of body 40, shown in Fig. 3 b; Make the side of cylinder form inclined-plane 41a, and make the bus of cylinder and the side of body 40 form angle β.Wherein, 15 °≤β≤75 °.
Shown in Fig. 3 b; The relative bottom surface 41c of the end face 41b of diversion division 41 of the present invention is to the skew of the right side of body 40; The bus of the diversion division 41 of cylinder body shape forms angle β (shown in Fig. 3 a) just and between the right flank of body 40 like this, when needs form spiral flue gas channelizing line 3, with body 40 bonds of a plurality of building blocks 4 on the sidewall of chimney barrel 1; Diversion division 41 is stretched out the liner 1a (as shown in Figure 6) of chimney barrel 1; And make the bottom surface 41c of diversion division 41 of a building block 4 being positioned at the top overlap (shown in Fig. 4 a, 4b) with the end face 41b of the diversion division 41 of a building block 4 of below, just can make the inclined-plane 41a smooth connection of a plurality of building blocks 4, constitute the smooth guide face 31 of spiral flue gas channelizing line 3; As shown in Figure 2; Because formation angle β between the right flank of the bus of diversion division 41 and body 40, a plurality of building block 4 bonds together the time, make spiral flue gas channelizing line 3 present rotation direction along clockwise direction.
The end face 41b of diversion division 41 also relatively bottom surface 41c to the skew of the left side of body 40; The bus of the diversion division 41 of cylinder body shape forms angle β (shown in Fig. 5 a) just and between the left surface of body 40 like this; When with a plurality of building block 4 bonds together the time; The bottom surface 41c of the diversion division 41 of a building block 4 above will being positioned at overlaps (shown in Fig. 5 a, 5b) with the end face of the diversion division 41 of a building block 4 of below; Just can make the inclined-plane 41a smooth connection of a plurality of building blocks 4 constitute the smooth guide face 31 of spiral flue gas channelizing line 3; Owing to form angle β between the left surface of the bus of diversion division 41 and body 40, a plurality of building block 4 bonds make channelizing line present the anticlockwise rotation direction in edge together the time.
Shown in Fig. 3,3a, 3b, the body 40 of building block 4 of the present invention is a rectangular shape, and the body 40 of building block 4 can also be the square shape, perhaps is other arbitrary shape.
Wherein, the end face of diversion division 41 and bottom surface 41b, 41c are a part oval or circle.
Shown in Fig. 3 b, the end face of the diversion division 41 of building block 4 of the present invention and bottom surface 41b, 41c are half-oval shaped, make the side of diversion division 41 form curved surface; End face and bottom surface 41b, 41c can also be semicircle or other camber line shape.
In addition, to stretch out the length of chimney barrel 1 liner 1a be the 0.5%-1.5% of correspondence position chimney barrel internal diameter to diversion division 41.Like this, the length that just makes diversion division 41 stretch out chimney barrel 1 liner 1a shortens along with reducing of chimney barrel internal diameter, thereby avoids the long flue gas that rises of giving of diversion division 41 extension elongations to cause resistance.
In addition, as shown in Figure 1, the bottom of spiral flue gas water conservancy diversion 3 of the present invention and advance between the mouth 10 to form distance, this distance is 1～5 meter; Make and in chimney barrel 1, behind the soaring certain distance, upwards rise along spiral flue gas channelizing line 3 again through the flue gas that flue 2 gets into.
Form distance between the top of the top of spiral flue gas water conservancy diversion 3 and chimney barrel 1, this distance is 5～30 meters, makes flue gas through behind the top of spiral flue gas water conservancy diversion 3; Being the acceleration form directly arranges to atmosphere; Flue gas resistance is little, and plume rigidity is big, and diffusance is wide.
Wherein, the bar number that spiral flue gas channelizing line 3 is set on the chimney barrel 1 liner 1a is many, and the bar number of spiral flue gas channelizing line 3 reduces along with chimney barrel 1 dwindling of internal diameter, and the rotation direction of every spiral flue gas channelizing line 3 is identical.
The bar number of spiral flue gas channelizing line 3 of the present invention is the 4-26 bar, and the distance between adjacent two equates that be 2-6.5 rice, the rotation direction of spiral flue gas channelizing line 3 is a clockwise direction, and the rotation direction of spiral flue gas channelizing line 3 also can be counterclockwise.
As shown in Figure 1 again, flue 2 of the present invention is angle of elevation alpha and advances mouth 10 and be connected, and makes flue gas tilt up to get into chimney barrel 1 inside via flue 2, so that promote the initial velocity of power that flue gas rises and flue gas rising.Wherein, 0 °＜α≤45 °.
Shown in Fig. 1 (a) and (b), flue 2 is a linear pattern, and an end of flue 2 advances 0～10 meter level of mouth and raising up in distance, makes an end of flue 2 become angle of elevation alpha and advance mouth 10 and be connected; Also can flue 2 be arranged to the shape of facing upward with the end face that advances the end that mouth 10 is connected, and the bottom surface still is a level, shown in Fig. 1 b, so also can make flue gas tilt up to get into chimney barrel 1 inside via flue 2.
In addition; Flue 2 is connected with the inwall of the liner 1a of chimney barrel is tangent and smooth with a side inwall that advances the end that mouth 10 is connected; Make flue gas tangentially tilt up to get into chimney barrel inside via said flue, as shown in Figure 8, like this; Flue gas is the spiral vortex type propradation after getting into chimney barrel 1 in chimney barrel 1; Wherein, flue 2 airintake directions are identical with the rotation direction of chimney barrel 1 inside spin formula flue gas channelizing line; Behind the flue gas rising certain distance; The flow of flue gas of 31 pairs of risings of smooth guide face of spiral flue gas channelizing line is carried out regular rotation around moving and elevator; Make bumpy flow control whole smoke evacuation process, thereby promote and strengthen the suction volume effect of central negative pressure, make strong corrosive materials such as condensation acid mist in the flue gas inhaled volume and be gathered in the axis area in the chimney barrel; Thereby thoroughly solved the etching problem of inner wall of stack, reached purpose of energy saving.
Of the present invention advance mouth 10 can be for one or more; It is said when to advance mouth be a plurality of; Each advances mouth 10 and connects a flue respectively; Circumferentially evenly arrange along chimney barrel bottom, make and advance flue gas that mouth 10 gets into and in chimney barrel 1, be the swirl shape smoke evacuation of rising along identical rotation direction via a plurality of.
Although preceding text have been done detailed description to the present invention; But the invention is not restricted to this; The technician in present technique field can principle according to the present invention make amendment, and therefore, all various modifications of carrying out according to principle of the present invention all are to be understood that to falling into protection scope of the present invention.
Claims (10)
1. a no rotten knot can chimney, comprising:
Chimney barrel (1), its liner (1a) is provided with spiral flue gas channelizing line (3), and its lower end is provided with into mouth (10);
Flue (2), one of which end are connected into, and mouth (10) upward communicates with chimney barrel (1) inside through advancing mouth (10); It is characterized in that,
Said spiral flue gas channelizing line (3) is formed by building block (4) bond that polylith has diversion division (41); The diversion division (41) of each building block (4) has smooth inclined-plane (41a); Make and inclined-plane (41a) smooth connection of bond all building blocks (4) together make flue gas rotate the guide face (31) that rises thereby form.
2. chimney as claimed in claim 1; It is characterized in that; Said flue (2) is angle of elevation alpha and advances mouth (10) and be connected with said; And tangent and smooth connection of liner (1a) inwall of a side inwall of said flue (2) and said chimney barrel (1), make flue gas tangentially tilt up to get into chimney barrel (1) inside via said flue (2).
3. according to claim 1 or claim 2 chimney; It is characterized in that; Said building block (4) comprises the body (40) of block on said chimney barrel (1) liner (1a), and said diversion division (41) is stretched out the liner (1a) of said chimney barrel (1) by an end face level of said body (40).
4. chimney as claimed in claim 3; It is characterized in that; Said diversion division (41) is a cylinder, and the end face of said cylinder (41b) moves to a lateral deviation of said body (40) bottom surface (41c) relatively, makes the side of said cylinder form said inclined-plane (41a); And make that the bus of said cylinder is parallel with the said end face of said body (40), with the said side formation angle β of said body (40).
5. chimney as claimed in claim 4; It is characterized in that; A said building block (4) is stacked in another said building block (4); And make the bottom surface (41c) of diversion division (41) of a said building block (4) overlap with the end face (41b) of the diversion division (41) of said another building block (4), thus make said inclined-plane (41a) smooth connection of all building blocks (4), form and saidly be used for making flue gas to be the guide face (31) of rotary rising.
6. chimney as claimed in claim 3 is characterized in that, the length that said diversion division (41) stretches out said chimney barrel (1) liner (1a) is the 0.5%-1.5% of correspondence position chimney barrel (1) internal diameter.
7. chimney as claimed in claim 6 is characterized in that, the bottom of said spiral flue gas channelizing line (3) and saidly advance between the mouth (10) to form distance.
8. chimney as claimed in claim 7 is characterized in that, forms distance between the top of said spiral flue gas channelizing line (3) and said chimney barrel (1) top.
9. chimney as claimed in claim 4 is characterized in that, said inclined-plane (41a) is curved surface, and the end face of said cylinder (41b) and bottom surface (41c) are a circle or an oval part.
10. chimney as claimed in claim 4 is characterized in that, 0 °＜α≤45 °, and 15 °≤β≤75 °.
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| CN2011101996726A CN102486064A (en) | 2011-07-15 | 2011-07-15 | Corrosion-free energy saving chimney |
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| CN2011101996726A CN102486064A (en) | 2011-07-15 | 2011-07-15 | Corrosion-free energy saving chimney |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108753A (en) * | 1985-10-28 | 1987-05-06 | 湖南省华湘高效烟囱建设公司 | A kind of inside is provided with the chimney of guiding device |
| CN101705756A (en) * | 2009-09-28 | 2010-05-12 | 郑德明 | Anticorrosive dust-collecting energy-saving chimney |
| CN201885244U (en) * | 2010-11-22 | 2011-06-29 | 郑德明 | Anticorrosion dustproof energy-saving chimney bore helical line |
| CN202209071U (en) * | 2011-07-15 | 2012-05-02 | 中环华创(北京)科技发展有限公司 | Corrosion-free energy-saving chimney |
-
2011
- 2011-07-15 CN CN2011101996726A patent/CN102486064A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108753A (en) * | 1985-10-28 | 1987-05-06 | 湖南省华湘高效烟囱建设公司 | A kind of inside is provided with the chimney of guiding device |
| CN101705756A (en) * | 2009-09-28 | 2010-05-12 | 郑德明 | Anticorrosive dust-collecting energy-saving chimney |
| CN201885244U (en) * | 2010-11-22 | 2011-06-29 | 郑德明 | Anticorrosion dustproof energy-saving chimney bore helical line |
| CN202209071U (en) * | 2011-07-15 | 2012-05-02 | 中环华创(北京)科技发展有限公司 | Corrosion-free energy-saving chimney |
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Application publication date: 20120606 |