CN203857480U - Membrane type and wall type front and after arch of large coal fired boiler - Google Patents
Membrane type and wall type front and after arch of large coal fired boiler Download PDFInfo
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- CN203857480U CN203857480U CN201420296664.2U CN201420296664U CN203857480U CN 203857480 U CN203857480 U CN 203857480U CN 201420296664 U CN201420296664 U CN 201420296664U CN 203857480 U CN203857480 U CN 203857480U
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- steel plate
- tube bank
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- large coal
- fired boiler
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Abstract
The utility model discloses a membrane type and wall type front and after arch of a large coal fired boiler. The membrane type and wall type front and after arch of the large coal fired boiler comprises a plurality of boiler front and after arch tube bundles, every two tube bundles are fixedly connected through a steel plate, one side, close to a boiler furnace, of each tube bundle and one side, close to the boiler furnace, of each steel plate are respectively covered with a pouring layer, a plurality of T-shaped pins are arranged in the pouring layers, each T-shaped pin comprises a pin head and a pin cap, and each pin head is fixedly connected to the corresponding steel plate. By means of the front and after arch, the pouring layers can be effectively prevented from cracking and falling off irregularly at high temperature, and thermal efficiency of the boiler can be effectively improved.
Description
Technical field
The utility model relates to boiler technology field, particularly arch before and after a kind of film-type wall-type for large coal-fired boiler.
Background technology
The front and back arch of large coal-fired boiler is the higher position of bearing temperature in boiler, and in the large coal-fired boiler course of work, the temperature of front and back arch often can reach more than 1400 ℃.Therefore on the arch tube bundle of front and back, conventionally need to be cast with refractory casting layer.But because tube bank is made by metal material, and castable in pouring layer is Inorganic Non-metallic Materials, and both difference of thermal expansion coefficient are larger, make pouring layer be full of cracks easily occur and come off.In addition, the thermal efficiency of existing large coal-fired boiler is not still very high, also exists in theory very large room for promotion.
Utility model content
The purpose of this utility model is to provide a kind of film-type wall-type front and back arch of large coal-fired boiler, and this front and back arch can effectively prevent that pouring layer from high temperature chapping and coming off, and can improve the thermal efficiency of boiler.
To achieve these goals, the utility model encircles before and after a kind of large coal-fired boiler film-type wall-type is provided, comprise multiple tracks boiler front and back arch tube bundle, described in adjacent twice, between tube bank, by steel plate, be fixedly connected with, described tube bank and steel plate are being coated with pouring layer near in a side of boiler furnace, in described pouring layer, be provided with many pieces of T shape pins, described T shape pin comprises ailhead and the head of a nail, and described ailhead is fixedly connected on described steel plate.
Preferably, described T shape pin is arranged along direction with described tube bank axially parallel on steel plate described in every a slice, and the head of a nail of described T shape pin is strip, and on steel plate, the head of a nail of two pieces of adjacent T shape pins is mutually vertical described in a slice.
Preferably, described T shape pin is along uniformly-spaced arranging with the direction of described tube bank axially parallel on steel plate every described, and described interval is greater than 1/2nd of described strip head of a nail length.
Preferably, described T shape pin is along arranging with the axial vertical direction of described tube bank between each steel plate, and between each steel plate, the head of a nail of two pieces of adjacent described T shape pins is mutually vertical.
Preferably, in described pouring layer, be also provided with a plurality of straight shape pin groups, each straight shape pin group comprises the many pieces of straight shape pins that are fixed on described tube bank side, the nail body of described straight shape pin is vertical with the axis of described tube bank, straight shape pin in same group is in the same plane, and described plane is through the interval between two pieces of T shape pins adjacent on steel plate described in a slice.
Preferably, in each straight shape pin group, the angle between adjacent two pieces of straight shape pins is 30～45 degree.
Preferably, on described steel plate, offer fabrication hole, described fabrication hole is along being distributed in distance with the direction of described tube bank axially parallel on steel plate described in a slice, and the fabrication hole on adjacent two described steel plates is spaced from each other in the horizontal direction.
Preferably, described pouring layer only covers in the described tube bank and steel plate near a side of boiler furnace.
Preferably, described pouring layer encircles corner in described front and back transition face and the angle between boiler furnace bottom surface are 80-90 degree.
Before and after the large coal-fired boiler film-type wall-type that the utility model provides, arch has following beneficial effect:
1, by steel plate, the tube bank of front and back arch is coupled together, strengthened interbank fastness, in pouring layer on covering tube bank and surface of steel plate, arrange and be fixed on the T shape pin on steel plate, and with orthogonal direction, arrange between the pin head of a nail, thereby formed netted array of structures, significantly strengthened the fastness of pouring layer.
2, in tube bank, arrange and sell nail directly to households, and sell nail place plane directly to households through the interval between T shape pin, not only strengthened pouring layer at the surperficial adhesive force of tube bank, can also from multiple directions and angle, to the pouring layer at T shape pin interval on steel plate, play reinforcement effect.
3, the fabrication hole arranging at steel plate can be as the charging aperture of pouring layer, rear arch upper castable forward during convenient construction, the mode Heterogeneous Permutation that fabrication hole separates with level between steel plate on the other hand, can observe from a fabrication hole (charging aperture) situation of overflowing and the flatness of the interior castable of fabrication hole contiguous steel plate, learn quickly and easily mobility status and the uniformity of castable in pouring layer, improved efficiency of construction.
4, pouring layer and only near burner hearth one side setting, the tube bank of opposite side and steel plate can be come out completely, and then steel plate is contacted completely with the flue gas of this side with tube bank, when guaranteeing that be full of cracks does not occur lower than 1400 ℃ tube bank temperature, improve the thermal efficiency of boiler, saved the required energy of stove water in heating furnace.
5, arches corner in front and back has cancelled pouring layer platform parallel with burner hearth ground in prior art, changes the transition face with bottom surface near vertical into, has avoided the serious dust stratification of rear arch arch head, has further improved the thermal efficiency of boiler.
Accompanying drawing explanation
Fig. 1 is the structural representation of arch before and after large coal-fired boiler that the utility model provides;
Fig. 2 is the overall structure schematic diagram of the large coal-fired boiler of arch before and after adopting shown in Fig. 1;
Fig. 3 is the position view of T shape pin in pouring layer in Fig. 1;
Fig. 4 is Fig. 1 structural representation in the horizontal direction;
In figure:
1. tube bank 2. steel plate 3. pouring layer 4.T shape pin 41. heads of a nail 42. are followed closely straight shape pin 6. fabrication hole 7. transition faces of the straight shape pin group 50. of body 43. ailhead 5.
The specific embodiment
In order to make those skilled in the art person understand better the utility model scheme, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, 2, arch before and after large coal-fired boiler film-type wall-type that the utility model provides, the tube bank 1 before and after comprising on arch, each is restrained 1 and in front and back, encircles first-class spaced and parallel and arrange, between tube bank 1, by steel plate 2, link together, form a kind of similar film-type wall-type structure.Please refer to Fig. 2, before and after the tube bank 1 of arch and steel plate 2 and only near the surface coverage of burner hearth, having one deck refractory casting layer 3, on opposite side, do not cover pouring layer, come out completely, adopt after such design, front and back can be encircleed to temperature when being controlled at 1400 ℃ of following assurances and not being burned, utilize steel plate 2 and tube bank 1 sidewall that opposite side comes out completely fully to contact with flue gas, the boiler water of restraining in 1 is heated, greatly increased heat exchange area, saved the energy.
Incorporated by reference to Fig. 3, also continue with reference to figure 1 and 4, in pouring layer 3 inside, be provided with many pieces of T shape pins 4, T shape pin 4 nails are comprised of the head of a nail 41, nail body 42 and ailhead 43, as its title, the head of a nail 41 of T shape pin 4 is strip, body 42 is orthogonal divides equally with nail, and nail body 42 is fixedly welded on steel plate 2 by ailhead 43 along the direction perpendicular to steel plate 2.The arrangement mode of T shape pin 4 on steel plate 2 is as follows:
On same a slice steel plate 2, the nail body 42 of T shape pin 4 is uniformly-spaced and arranges along the parallel lines direction (being that steel plate is longitudinal) with tube bank 1 axis, orthogonal dividing equally of the head of a nail 41 of 4 of adjacent two pieces of T shape pins in the vertical, and the interval that adjacent T shape pin 4 nail body is 42 is greater than 1/2nd of the head of a nail 41 length, make to pull open certain distance between the head of a nail 41, this slightly microdispersed form, when guaranteeing that pouring layer 3 is played to reinforcement effect, can be avoided pin to arrange too much overstocked and too much take the space of pouring layer 3 itself;
Between each steel plate 2, namely in horizontal (horizontal direction), T shape pin 4 nail bodies 42 are arranged along the direction vertical with tube bank 2 axis, in conjunction with every steel plate 2, on every steel plate, nail body 42 positions of T shape pin 4 are corresponding one by one in the horizontal direction, also can say that following closely body 42 integral body on steel plate 2 lines up in the mode of " chessboard of go " overcrossing point.For the head of a nail 41, between each steel plate, the head of a nail 41 of two pieces of adjacent T shape pins 4 is also mutually vertical, adopt after such arrangement mode, each T shape pin 4 is seen and has been formed a kind of solid firmly network structure from integral body on steel plate 2, can significantly improve the adhesive force of pouring layer 3 on the arch of front and back, overcome the irregular be full of cracks of pouring layer 3 simultaneously.
As further improvement, in pouring layer 3, also along tube bank 1, be longitudinally provided with the many groups of straight shape pin groups 5 that are fixed on tube bank side, each straight shape pin group is comprised of 3 pieces of straight shape pins 50, the nail body of straight shape pin 50 is welded on the side of tube bank 1 along the direction vertical with tube bank 1 axis, 3 pieces of straight shape pins 50 are in the same cross section of tube bank 1, wherein, one piece of straight shape pin 50 is also perpendicular to steel plate 2 plate faces, the angle that its two piece straight shape pins adjacent with both sides are 50 is 40 °, above-mentioned cross section is through the interval of 41 of adjacent two pieces of T shape pin 4 heads of a nail in the vertical, so not only from multiple directions, to restraining the pouring layer 3 of 1 surface covering, reinforce, can also to the pouring layer between adjacent T shape pin 4 steel plate 2, reinforce from a plurality of angles and direction, the plane reticular structure that the T shape pin head of a nail 41 is formed has obtained the reinforcement on stereo directional, pouring layer 3 overall adhesion have been strengthened in all directions.
On each steel plate 2, also offer square fabrication hole 6, on same a slice steel plate 2, fabrication hole 6 is equally spaced arranged along the direction (being that steel plate 2 is longitudinal) parallel with tube bank 1 axis.Fabrication hole 6 between adjacent two steel plates 2 is spaced from each other in (horizontal) in the horizontal direction, and each fabrication hole 6 is positioned at the middle that is adjacent two fabrication holes 6 on steel plate 2 in the horizontal direction just.An effect of this fabrication hole 6 is as castable, to inject the feeding mouth use of pouring layer 3, and another effect is to observe the flow locations of pouring layer 3 interior castables and the uniformity coefficient of distribution, the convenient construction progress of controlling.For example, when from an interior injection castable of fabrication hole 6, because fabrication hole 6 shifts to install 2 of each steel plates, whether the fabrication hole 6 that can observe contiguous steel plate 2 from this fabrication hole 6 has the flatness after castable is overflowed and overflowed, thereby determine the flow direction and the particular location of castable in pouring layer 3, with and uniformity coefficient.
Refer again to Fig. 2, the front and back arch of the large coal-fired boiler that the utility model provides, (an arch position) is provided with transition face 7 around the corner, transition face 7 is 90 ° of settings with burner hearth bottom surface, coal ash in convenient like this burner hearth falls in front and back arch corner, can not cause dust stratification, improve the thermal efficiency of boiler.
Above arch before and after large coal-fired boiler film-type wall-type provided by the utility model is described in detail.Applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand core concept of the present utility model.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (9)
1. before and after large coal-fired boiler film-type wall-type, encircle, comprise multiple tracks boiler front and back arch tube bundle, it is characterized in that, described in adjacent twice, between tube bank, by steel plate, be fixedly connected with, described tube bank and steel plate are being coated with pouring layer near in a side of boiler furnace, in described pouring layer, be provided with many pieces of T shape pins, described T shape pin comprises ailhead and the head of a nail, and described ailhead is fixedly connected on described steel plate.
2. before and after large coal-fired boiler film-type wall-type according to claim 1, encircle, it is characterized in that, described T shape pin is arranged along the direction with described tube bank axially parallel on steel plate described in every a slice, the head of a nail of described T shape pin is strip, and on steel plate, the head of a nail of two pieces of adjacent T shape pins is mutually vertical described in a slice.
3. before and after large coal-fired boiler film-type wall-type according to claim 2, encircle, it is characterized in that, described T shape pin is along uniformly-spaced arranging with the direction of described tube bank axially parallel on steel plate every described, and described interval is greater than 1/2nd of described strip head of a nail length.
4. before and after large coal-fired boiler film-type wall-type according to claim 3, encircle, it is characterized in that, described T shape pin is along arranging with the axial vertical direction of described tube bank between each steel plate, and between each steel plate, the head of a nail of two pieces of adjacent described T shape pins is mutually vertical.
5. before and after large coal-fired boiler film-type wall-type according to claim 4, encircle, it is characterized in that, in described pouring layer, be also provided with a plurality of straight shape pin groups, each straight shape pin group comprises the many pieces of straight shape pins that are fixed on described tube bank side, the nail body of described straight shape pin is vertical with the axis of described tube bank, straight shape pin in same group is in the same plane, and described plane is through the interval between two pieces of T shape pins adjacent on steel plate described in a slice.
6. arch before and after large coal-fired boiler film-type wall-type according to claim 5, is characterized in that, the angle in each straight shape pin group between adjacent two pieces of straight shape pins is 30～45 degree.
7. before and after large coal-fired boiler film-type wall-type according to claim 1, encircle, it is characterized in that, on described steel plate, offer fabrication hole, described fabrication hole is along being distributed in distance with the direction of described tube bank axially parallel on steel plate described in a slice, and the fabrication hole on adjacent two described steel plates is spaced from each other in the horizontal direction.
8. according to arch before and after the arbitrary described large coal-fired boiler film-type wall-type of claim 1-7, it is characterized in that, described pouring layer only covers in the described tube bank and steel plate near a side of boiler furnace.
9. according to arch before and after the arbitrary described large coal-fired boiler film-type wall-type of claim 1-7, it is characterized in that, transition face and the angle between boiler furnace bottom surface that described pouring layer encircles corner in described front and back are 80-90 degree.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420296664.2U CN203857480U (en) | 2014-06-05 | 2014-06-05 | Membrane type and wall type front and after arch of large coal fired boiler |
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| CN201420296664.2U CN203857480U (en) | 2014-06-05 | 2014-06-05 | Membrane type and wall type front and after arch of large coal fired boiler |
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| CN203857480U true CN203857480U (en) | 2014-10-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033922A (en) * | 2014-06-05 | 2014-09-10 | 北京英翔博瑞耐火材料科技有限公司 | Membrane wall type front-rear arch for large-sized coal-fired boiler |
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2014
- 2014-06-05 CN CN201420296664.2U patent/CN203857480U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033922A (en) * | 2014-06-05 | 2014-09-10 | 北京英翔博瑞耐火材料科技有限公司 | Membrane wall type front-rear arch for large-sized coal-fired boiler |
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