CN101315182A - Sealing method for combination part of pipe and boiler body - Google Patents
Sealing method for combination part of pipe and boiler body Download PDFInfo
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- CN101315182A CN101315182A CNA2007101058461A CN200710105846A CN101315182A CN 101315182 A CN101315182 A CN 101315182A CN A2007101058461 A CNA2007101058461 A CN A2007101058461A CN 200710105846 A CN200710105846 A CN 200710105846A CN 101315182 A CN101315182 A CN 101315182A
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Abstract
The invention provides a method for sealing the junction between a pipe with the body of a boiler. The method is characterized in that: a ceramic fiber coating with laminated structure is adopted as seal material covered from inside to outside; a high-temperature adhesive layer is coated between the innermost layer of the ceramic fiber coating and the steel plate of a boiler body and between layers of the ceramic fiber coating; a stainless steel mesh is covered on the outermost layer; and stainless steel nails, gaskets and check latch rings are adopted as fasteners. Since the ceramic fiber coating is adopted as the seal material, when the boiler is in a hot state, the expansion-induced displacement at the junction is absorbed and adjusted by the laminated ceramic fiber coating, thereby forming a three-dimensional flexible uniform seal. Therefore, the method solves the problems of air leakage and dust leakage due to expansion of the boiler, prevents the leakage due to thermal alternate stress, prolongs the service life of the boiler, reduces the operation and maintenance costs and labor intensity, and increases economic benefits.
Description
Technical field
The present invention relates to a kind of encapsulating method, especially relate to a kind of pipeline of boiler tubing field of sealing technology and encapsulating method of boiler body joint portion of belonging to.
Background technology
There is a large amount of steam-water pipes junction in existing boiler of power plant furnace roof, and the expansion issues of these junctions is inevitable, so must do encapsulation process; Power plant is to adopt traditional metal sealing to the solution of the sealing of boiler furnace roof and the ash that leaks out basically at present, promptly at the first casting in pre-sealed position plastic refractory, after filling some insulation materials, form the once sealing layer with the steel plate welding then, adopt again and water material feeding, do heat-insulation layer at last and handle; This technology can not finely absorb the boiler effectively hot expansion of body of heater is brought when normally moving swell increment and the consequent grey problem of leaking out, because say from principle, the different heating surfaces of boiler are because of its tubing difference, interior media temperature difference, so certainly exist expansion, and its alternating thermal stress is and huge, the shortcoming of conventional seals maximum is because sealing is the metal sealing of rigidity, can not absorb the stress that the different directions motion produces between the different parts that causes owing to thermal change, can only rigid containment leak, under the effect of alternating thermal stress, sealing function is difficult to lastingly, at short notice will be destroyed, cause the ash that leaks out, in case and furnace wall or leakage in top, a large amount of dusts burner hearth of emerging when malleation sucks cold air again in a large number during negative pressure.Thereby cause the interior negative pressure of burner hearth to be difficult to keep, force the blower fan electric current to increase, power consumption increases, and boiler combustion is insufficient, and heat loss due to exhaust gas increases, and boiler thermal output reduces.Traditional Sealing Technology is difficult to solve this technical problem, can only play provisional effect, and this encapsulating method can bring a lot of disadvantageous consequences to power plant, for example: one, do a furnace roof reparation during as overhaul in per 3 or four years, though its nonrecurring charge drops into little, but this overlapping investment fund accumulative total, the accumulation of its total value can be a no small expense; Two, as the not disposable grey problem of leaking out that solves long-term effectively, can overhaul department and the special worker of boiler to power plant and bring trouble and working strength in the service work; Consider from economic angle that three, the accumulative total in 1 year of thermal efficiency loss is amounted to RMB calculating, loss also is quite huge; Four, social benefit and environmental issue certainly will produce adverse influence to permanent development because of the leak out environmental pollution that brought of ash and plant area pollute, and for the staff, in the past for a long time, can be unfavorable for that also the worker's is healthy.Therefore effectively absorbing the expansion of boiler, solve boiler because of the grey problem of leaking out that expansion brings, is power plant's insurmountable for many years boiler tubing field of sealing technology a great problem.
Summary of the invention
The encapsulating method that the purpose of this invention is to provide a kind of pipeline and boiler body joint portion, it can effectively absorb the expansion of boiler, solves the grey problem of leaking out that boiler brings because of expansion.
The objective of the invention is such realization, the encapsulating method of a kind of pipeline and boiler body joint portion is provided, its feature
Be, follow these steps to carry out:
(1) cleaning boiler body steel plate outer surface;
(2) on the boiler body steel plate around the position of pipeline, the stainless steel nail that successively decreases as roughly center, welding and steel plate outer surface approximate vertical and length with pipeline;
(3) at boiler body surface of steel plate coated with high temperature adhesive phase;
(4) one deck ceramic fiber layer is passed the stainless steel nail described in (2), cover on the high-temperature adhesives layer described in (3);
(5) at the surface-coated high-temperature adhesives layer of the ceramic fiber layer described in (4);
(6) again one deck ceramic fiber layer is passed the stainless steel nail described in (2), cover on the high-temperature adhesives layer described in (5);
(7) at the surface-coated high-temperature adhesives layer of the ceramic fiber layer described in (6);
(8) again one deck ceramic fiber layer is passed the stainless steel nail described in (2), cover on the high-temperature adhesives layer described in (7);
(9) at the surface-coated high-temperature adhesives layer of the ceramic fiber layer described in (8);
(10) one deck stainless (steel) wire is passed the stainless steel nail described in (2), cover on the high-temperature adhesives layer described in (9);
(11) pad is passed the stainless steel nail described in (2);
(12) the check snap ring is passed the stainless steel nail described in (2), the check snap ring is exerted pressure towards the direction of the boiler body steel plate described in (2), described pad compresses the stainless (steel) wire described in (10) until (11);
(13) pad described in (11) and the stainless (steel) wire described in (10) are welded together, make stainless (steel) wire form approximate cone shape revolving body.
When the number of plies of above-mentioned ceramic fiber layer during greater than three layers, step (4) is preceding carrying out, and covers another layer stainless (steel) wire between innermost layer ceramic fiber layer and boiler body steel plate earlier; And this layer stainless (steel) wire passed above-mentioned stainless steel nail, adjacent with the outer surface of boiler body steel plate and pipeline and make it extend to outermost layer ceramic fiber layer outside, then at this layer stainless (steel) wire surface-coated high-temperature adhesives layer; After step (13) is finished, use connecting ring that the edge of its edge and outermost layer stainless (steel) wire is linked together at last.
When the number of pipeline is many pipelines, cover banded ceramic fiber layer and stainless (steel) wire at pipeline enclosure.
Owing to adopted such scheme, the present invention to adopt nonmetal, flexible ceramic fiber layer as encapsulant, ceramic fibre is a kind of refractory material, has very high density, intensity, thermal shock resistance and high temperature insulating heat-insulating property; By high-temperature adhesives ceramic fiber layer and boiler body metal surface are combined firmly, adopt high-temperature adhesives again, the ceramic fibre of multi-layered high-density is bonded together, the position of leaking is easily sealed, outside again with the cooperation of stainless (steel) wire by stainless steel nail and pad, check snap ring, ceramic fiber layer overall fixed in addition; Therefore when boiler thermal-state, junction and each position are because the displacement that expansion of metal coefficient difference causes absorbs adjusting by the multi-layer ceramics fiber, whole " membranaceous " hermetically-sealed construction is plasticity, the multi-layer three-dimension solid flexible that forms from inside to outside evenly seals, thoroughly solve boiler because of the grey problem of leaking out that expansion brings, do not had the leakage phenomenon that causes because of alternating thermal stress again; Therefore prolonged boiler service life, reduce operation and maintenance cost, reduced personnel's working strength simultaneously, and brought huge economic benefit.
Description of drawings
Fig. 1 is a kind of encapsulating method schematic diagram of the embodiment of the invention;
Fig. 2 is second kind of encapsulating method schematic diagram of the embodiment of the invention;
Fig. 3 is the third encapsulating method schematic diagram of the embodiment of the invention.
The specific embodiment
The present invention is further described below in conjunction with accompanying drawing.
As shown in Figure 1, the steps include:
(1) cleaning boiler body steel plate 9 outer surfaces;
(2) on boiler body steel plate 9 around the position of pipeline 10, the stainless steel nail 4 that successively decreases as roughly center, welding and boiler body steel plate 9 outer surface approximate vertical and length with pipeline 10;
(3) at boiler body steel plate 9 surface-coated high-temperature adhesives layers 31;
(4) one deck ceramic fiber layer 1 is passed the stainless steel nail 4 described in (2), cover on the high-temperature adhesives layer 31 described in (3);
(5) at the surface-coated high-temperature adhesives layer 3 of the ceramic fiber layer 1 described in (4);
(6) again one deck ceramic fiber layer 1 is passed the stainless steel nail 4 described in (2), cover on the high-temperature adhesives layer 3 described in (5);
(7) at the surface-coated high-temperature adhesives layer 3 of the ceramic fiber layer 1 described in (6);
(8) again one deck ceramic fiber layer 1 is passed the stainless steel nail 4 described in (2), cover on the high-temperature adhesives layer 3 described in (7);
(9) at the surface-coated high-temperature adhesives layer 3 of the ceramic fiber layer 1 described in (8);
(10) one deck stainless (steel) wire 2 is passed the stainless steel nail 4 described in (2), cover on the high-temperature adhesives layer 3 described in (9);
(11) pad 5 is passed the stainless steel nail 4 described in (2);
(12) check snap ring 6 is passed the stainless steel nail 4 described in (2), check snap ring 6 is exerted pressure towards the direction of the boiler body steel plate 9 described in (2), compress the stainless (steel) wire 2 described in (10) until the pad 5 described in (11);
(13) pad described in (11) 5 and the stainless (steel) wire 2 described in (10) are welded together, make stainless (steel) wire 2 form approximate cone shape revolving body.
After above-mentioned steps was finished, an end 41 of stainless steel nail 4 welded together with boiler body steel plate 9, and its other end 42 is fixed together with check snap ring 6; Pipe box 12 through walls is positioned at the inside of the ceramic fiber layer 1 of innermost layer.
As shown in Figure 2, when the number of plies of ceramic fiber layer 1 during greater than three layers (being four layers among Fig. 2), step shown in Fig. 1 (4) is preceding carrying out, between innermost layer ceramic fiber layer 1 and boiler body steel plate 9, cover another layer stainless (steel) wire 7 earlier, and stainless (steel) wire 7 passed above-mentioned rust steel nail 4, adjacent with the outer surface of boiler body steel plate 9 and pipeline 10 and make it extend to outermost layer ceramic fiber layer 1 outside, then at this layer stainless (steel) wire 7 surface-coated high-temperature adhesives layers 3; After last step (13) in Fig. 1 is finished, use connecting ring 8 that the edge 21 of its edge 71 and outermost layer stainless (steel) wire 2 is linked together: between the outer surface of above-mentioned stainless (steel) wire 7 and boiler body steel plate 9, can be before covering stainless (steel) wire 7 steps, coating one deck high-temperature adhesives 11.
As shown in Figure 3, when the number of the pipeline 10 that passes boiler body steel plate 9 is many pipelines, cover banded ceramic fiber layer 1 and stainless (steel) wire 2 in 10 in pipeline.
Claims (4)
1, the encapsulating method of a kind of pipeline and boiler body joint portion is characterized in that, follows these steps to carry out:
(1) cleaning boiler body steel plate outer surface;
(2) on the boiler body steel plate around the position of pipeline, the stainless steel nail that successively decreases as roughly center, welding and steel plate outer surface approximate vertical and length with pipeline;
(3) at boiler body surface of steel plate coated with high temperature adhesive phase;
(4) one deck ceramic fiber layer is passed the stainless steel nail described in (2), cover on the high-temperature adhesives layer described in (3);
(5) at the surface-coated high-temperature adhesives layer of the ceramic fiber layer described in (4);
(6) again one deck ceramic fiber layer is passed the stainless steel nail described in (2), cover on the high-temperature adhesives layer described in (5);
(7) at the surface-coated high-temperature adhesives layer of the ceramic fiber layer described in (6);
(8) again one deck ceramic fiber layer is passed the stainless steel nail described in (2), cover on the high-temperature adhesives layer described in (7);
(9) at the surface-coated high-temperature adhesives layer of the ceramic fiber layer described in (8);
(10) one deck stainless (steel) wire is passed the stainless steel nail described in (2), cover on the high-temperature adhesives layer described in (9);
(11) pad is passed the stainless steel nail described in (2);
(12) the check snap ring is passed the stainless steel nail described in (2), the check snap ring is exerted pressure towards the direction of the boiler body steel plate described in (2), described pad compresses the stainless (steel) wire described in (10) until (11);
(13) pad described in (11) and the stainless (steel) wire described in (10) are welded together, make stainless (steel) wire form approximate cone shape revolving body.
2, the encapsulating method of pipeline according to claim 1 and boiler body joint portion, it is characterized in that: when the number of plies of ceramic fiber layer during greater than three layers, step (4) described in carry out claim 1 is preceding, covers another layer stainless (steel) wire between innermost layer ceramic fiber layer and boiler body steel plate earlier; And this layer stainless (steel) wire passed above-mentioned stainless steel nail, adjacent with the outer surface of boiler body steel plate and pipeline and make it extend to outermost layer ceramic fiber layer outside, then at this layer stainless (steel) wire surface-coated high-temperature adhesives layer; After step (13) is finished, use connecting ring that the edge of its edge and outermost layer stainless (steel) wire is linked together at last.
3, the encapsulating method of pipeline according to claim 2 and boiler body joint portion is characterized in that: between the outer surface of above-mentioned stainless (steel) wire and boiler body steel plate, apply one deck high-temperature adhesives.
4, the encapsulating method of pipeline according to claim 1 and boiler body joint portion is characterized in that: when the number of pipeline is many pipelines, cover banded ceramic fiber layer and stainless (steel) wire at pipeline enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101058461A CN101315182A (en) | 2007-06-01 | 2007-06-01 | Sealing method for combination part of pipe and boiler body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101058461A CN101315182A (en) | 2007-06-01 | 2007-06-01 | Sealing method for combination part of pipe and boiler body |
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| Publication Number | Publication Date |
|---|---|
| CN101315182A true CN101315182A (en) | 2008-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101058461A Pending CN101315182A (en) | 2007-06-01 | 2007-06-01 | Sealing method for combination part of pipe and boiler body |
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| CN (1) | CN101315182A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011069333A1 (en) * | 2009-12-09 | 2011-06-16 | 上海锅炉厂有限公司 | Thermal insulation and sealing device between boiler platen heating surface tube bundle and furnace ceiling tubes |
| CN102338369A (en) * | 2010-07-20 | 2012-02-01 | 王悦 | Method and device for sealing body of power station boiler |
| CN102829465A (en) * | 2012-09-17 | 2012-12-19 | 宜兴摩根热陶瓷有限公司 | Furnace top sealing structure of styrene steam superheating furnace |
| CN103062752A (en) * | 2012-12-30 | 2013-04-24 | 深圳市广前电力有限公司 | Heat insulation structure for through-wall pipe of gas-turbine waste heat boiler |
| CN104406154A (en) * | 2014-11-25 | 2015-03-11 | 上海岱山电力安装工程有限公司 | Furnace top leakproof sealing technology with multi-directional stress absorbing function |
-
2007
- 2007-06-01 CN CNA2007101058461A patent/CN101315182A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011069333A1 (en) * | 2009-12-09 | 2011-06-16 | 上海锅炉厂有限公司 | Thermal insulation and sealing device between boiler platen heating surface tube bundle and furnace ceiling tubes |
| CN102338369A (en) * | 2010-07-20 | 2012-02-01 | 王悦 | Method and device for sealing body of power station boiler |
| CN102338369B (en) * | 2010-07-20 | 2014-01-08 | 王悦 | Method and device for sealing body of power station boiler |
| CN102829465A (en) * | 2012-09-17 | 2012-12-19 | 宜兴摩根热陶瓷有限公司 | Furnace top sealing structure of styrene steam superheating furnace |
| CN102829465B (en) * | 2012-09-17 | 2014-07-30 | 宜兴摩根热陶瓷有限公司 | Furnace top sealing structure of styrene steam superheating furnace |
| CN103062752A (en) * | 2012-12-30 | 2013-04-24 | 深圳市广前电力有限公司 | Heat insulation structure for through-wall pipe of gas-turbine waste heat boiler |
| CN103062752B (en) * | 2012-12-30 | 2016-01-20 | 深圳市广前电力有限公司 | For the thermal insulation structure of combustion engine waste heat boiler wall pipe |
| CN104406154A (en) * | 2014-11-25 | 2015-03-11 | 上海岱山电力安装工程有限公司 | Furnace top leakproof sealing technology with multi-directional stress absorbing function |
| CN104406154B (en) * | 2014-11-25 | 2016-03-30 | 上海岱山电力安装工程有限公司 | A kind of have the furnace roof leak-proof sealing device absorbing multi-faceted stress function |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081203 |