CN202254307U - Water-circulating structure for corner pipe - Google Patents
Water-circulating structure for corner pipe Download PDFInfo
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- CN202254307U CN202254307U CN2011202694930U CN201120269493U CN202254307U CN 202254307 U CN202254307 U CN 202254307U CN 2011202694930 U CN2011202694930 U CN 2011202694930U CN 201120269493 U CN201120269493 U CN 201120269493U CN 202254307 U CN202254307 U CN 202254307U
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Abstract
The utility model discloses a water-circulating structure for a corner pipe. The water-circulating structure consists of a hearth arranged on a fire grate, a membrane type water-cooling wall heating surface and a convection shaft membrane type wall heating surface adjacent to the membrane type water-cooling wall heating surface, wherein a boiler body has a self-supported framework type structure consisting of large-diameter steel tubes arranged on four corners of the structure, a boiler and a container. The shortcomings of pipe explosion and low-load running are overcome, and power failure protection is realized; steel frames are saved, the air tightness is high, little air can be leaked, pipe explosion is avoided, the combustion efficiency is high, and the system can work safely and reliably at any load; and furthermore, the water-circulating structure has a super-strong power failure protection function, and the dangerous working conditions of low-temperature erosion and ash plugging which are caused by sulfuric acid dew formation in the smoke are effectively reduced.
Description
Technical field
The utility model relates to the Thermal Power Engineering technical field, is specifically related to a kind of cornue water circulation structure.
Background technology
Since 2000, be accompanied by the raising of China's industrialization and development of urbanization and energy-conserving and environment-protective requirement, the jumbo increase of city heat supply demand, the coal-fired central heating boiler of big capacity grate firing has got into fast-developing period.It is China's main successful experience of applying of energy-saving and emission-reduction under the new situation that grate firing boiler maximizes.According to the investigation to the coal-fired central heating boiler operation conditions of big capacity grate firing on the market, fire tube boiler is the transitional product that is changed into external combustion in the boiler evolution by internal combustion, suitablely further maximizes; Water-tube boiler is the only way that the grate firing hot-water boiler maximizes and parameter improves; And in the water-tube boiler structure, corner-tube hot-water boiler is rational in infrastructure, and raw materials consumption is few; Long-term operation is safe and reliable; Energy-efficient, reduce discharging environmental protection, will become the first-selected type of furnace of the big capacity hot-water boiler of China's central heating stations.
At present; The corner tube boiler of having produced is that the technical products afterwards introduced selected through the expert through the GEF project in 1992 by China from external numerous Industrial Boiler products; Mainly contain two kinds of structures of Natural Circulation and forced circulation, operation some problems occur for many years in succession; Never obtain the market approval; Find that through market survey the open type burner hearth and the chimney arch technology of introducing technology in combustion system are not suitable for China's coal, there is following hidden danger in existing cornue technology at the long-term operation secure context:
(1) corner-tube hot-water boiler of existing Natural Circulation all adopts the fin panel casing manufacturing; Form in view of fin panel casing adopts light pipe and band steel assembly welding, in case the fin panel casing pipe explosion accident takes place, maintenance difficulty is very big; Maintenance cycle is long; Butt welding difficult quality guarantee during field maintenance stays welding hidden danger easily, becomes new booster inducement.Because the hot-water boiler heating demand is extremely unstable, hot water flow changes bigger in time, and during Natural Circulation, the improper hydrodynamic force operating mode that stagnation takes place or flow backwards through regular meeting worsens heat-transfer capability, causes wall temperature to ascend to heaven, so that causes the tragedy of booster.
(2) in addition; Hot-water boiler has very big load change property in heat supplying process; Quantity of circulating water changes between 50%～100%, and during load change, the minimum safe water speed of the hot-water boiler of Natural Circulation and forced circulation is difficult to keep; Possibly cause the dangerous operating modes such as stagnation and refluence of water circulation in the tube bank that furnace wall cooling flows downward because of water flow velocity is low excessively, the underrun and the power-failure protecting of existing forced circulation corner-tube hot-water boiler are quite queried.The hot-water boiler of the forced circulation of moving on the market; In most cases; The upper and lower collection case internal placement of fin panel casing dividing plate, be divided into whole water wall surface upwards and the closed circuit that flows downward, the closed circuit that flows downward in underrun when having a power failure suddenly; The stagnation of water circulation and the hydrodynamic force operating mode of refluence will certainly appear; Hot-water boiler operational management safety is arrived in the serious threat that exists of this operating mode, therefore, existing contingent underload of forced circulation mode and power-failure protecting problems affect applying of advanced technology product.
Summary of the invention
In order to overcome the deficiency that above-mentioned prior art exists; The purpose of the utility model is to provide a kind of cornue water circulation structure; Avoided causing the defective of booster, underrun and power-failure protecting, realized saving steelframe, air-tightness good, leak out less, can not cause that booster, efficiency of combustion are high, guarantee that this structure can work, have superpower power-failure protecting function safely and reliably and reduce the cold end corrosion that the sulfuric acid dewfall causes in the flue gas effectively and stifled grey dangerous operating mode under any load.
In order to achieve the above object, the technical scheme that the utility model adopted is:
A kind of cornue water circulation structure; Comprise and vertically be attached at the burner hearth 103 that leans on mutually before and after having and front wall 102 outer walls and the two side angle inlay cards of the boiler of flow through shaft 101 are closed in the front wall and the both walls cornue 4 of this front wall 102 outer walls two inclines; Drum 10 conductings on front wall and both walls cornue 4 and front wall top; Front wall and both walls cornue 4 vertically are attached at boiler flow through shaft 101 rear outer walls and two side angle inlay cards are closed in this flow through shaft and both walls cornue 30 are conducted to flow through shaft 101 rear outer walls two inclines together through communicating pipe 9; Front wall and both walls cornue 4 and to flow through shaft and both walls cornue 30 respectively with the burner hearth of the front wall fin panel casing next part case 2 of front wall 102 outer wall bottoms and outer wall bottom, burner hearth 103 rear after 40 conductings of wall fin panel casing next part case; The top of the burner hearth 103 that flow through shaft 101 the place aheads are leaned on mutually is disposed with wall fin panel casing upper collecting chamber 19 behind burner hearth front wall fin panel casing upper collecting chamber 18 and the burner hearth in proper order by front and back; Wall fin panel casing upper collecting chamber 19 is conducted with the back with the preceding level communicating pipe 17 separately through pipeline respectively level communicating pipe 21 behind burner hearth front wall fin panel casing upper collecting chamber 18 and the burner hearth; And preceding level communicating pipe 17 was conducted with the preceding vertical connection pipe 15 of the side wall front portion, the left and right sides that is distributed in boiler and the back vertical connection pipe 26 at side wall rear portion, the left and right sides respectively with back level communicating pipe 21; Have side wall gusset 30 on this left and right sides side wall; Preceding vertical connection pipe 15 and of side wall fin panel casing next part case 1 connection of back vertical connection pipe 26 with the setting of left and right sides side wall below; And the side wall fin panel casing upper collecting chamber 14 that above the side wall of the left and right sides of boiler, is provided with is connected with drum 10; The top of drum 10 and wall membrane wall next part case 38 behind the flow through shaft is connected with last vertical connection pipe 33 conductings through last level communicating pipe 13 successively to flow through shaft 101 wall belows, back; To below the rear outer wall of flow through shaft 101 to flow through shaft after wall membrane wall next part case 38 with to flow through shaft after wall fin panel casing 29 be connected; First order economizer 31, second level economizer 34 and third level economizer 36 have been arranged in series connection connection on the wall fin panel casing 29 behind the flow through shaft, wall fin panel casing 29 behind the flow through shaft also has been communicated with the furnace roof outlet collection case 20 at boiler top.
The heating surface of described first order economizer 31, second level economizer 34 and third level economizer 36 is flag formula structure heating surface.
Described front wall and both walls cornue 4, side wall gusset 30 and flow through shaft 101 back walls are constituted self supporting structures, the flow direction of their internal water be all descend mobile.
The top and bottom of the burner hearth front wall pattern water-cooling wall 6 in the described boiler are connected with burner hearth front wall fin panel casing upper collecting chamber 18 and front wall fin panel casing next part case 2 respectively; The top and bottom of back wall fin panel casing 28 are respectively with wall fin panel casing next part case 40 conductings behind wall fin panel casing upper collecting chamber behind the burner hearth 19 and the burner hearth; The top and bottom of side wall pattern water-cooling wall 7 are respectively with side wall fin panel casing upper collecting chamber 14 and 1 conducting of side wall fin panel casing next part case; Respectively with furnace roof outlet collection case 20 with to wall membrane wall next part case 38 conductings behind the flow through shaft, the heating surface of the heating surface of burner hearth front wall pattern water-cooling wall 6, back wall fin panel casing 28, the heating surface of side wall pattern the water-cooling wall 7 and heating surface of flow through shaft fin panel casing 29 all risen flows to flow through shaft fin panel casing 29.
Described two ends to wall membrane wall next part case 38 behind the flow through shaft all with to flow through shaft 101 back walls are connected with side wall gusset 30 mutually non-conduction formulas.
Described the burner hearth 103 and working-medium water in the fin panel casing in the flow through shaft 101 all risen flows, and its all heating surface tube keeps not having descending and flows.
Utilize the major diameter cornue to constitute frame system, double decline and circulation communicating pipe of doing support and working-medium water, save steelframe; All adopt the fin panel casing heating surface, save refractory material and heat insulation, insulation material, air-tightness is good, and it is few to leak out, and efficiency of combustion is high; Working-medium water in all heating surfaces all rises and flows; All heating surface tubes do not have decline and flow; Descending flows is non-heating surface tube; Stopped fully in the design of conventional Natural Circulation or conventional forced circulation loop because have the mobile stagnation that possibly occur of part water screen tube decline or the improper hydrodynamic force operating mode of refluence; Working-medium water in the fin panel casing all rises to flow and guarantees that working-medium water has the higher quality flow velocity, eliminates effectively that the water screen tube wall temperature that possibly occur when subcooled boiling takes place raises and the dangerous operating mode that causes booster; More efficientlyly be, water circulation structure adopts the auxiliary forced circulation mode of single drum, has increased water capacity, guarantees that this system can work under any load safely and reliably; This circulatory system is after having a power failure suddenly, and automatic blow off valve valve air relief is opened, and drum, down-comer and tedge can constitute natural convection loop again, have superpower power-failure protecting function; Working-medium water is constantly heated the back by heating surfaces at different levels and gets into the minimum first order economizer of flue-gas temperature, has improved economizer surface metallic walls surface temperature, has reduced the dangerous operating mode of the cold end corrosion that the sulfuric acid dewfall causes in the flue gas with stifled ash effectively.
Description of drawings
Accompanying drawing is the side-looking transparent configuration sketch map of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done more detailed explanation.
Shown in accompanying drawing; Heating surface is all forced the cornue water circulation structure that rises mobile; Comprise and vertically be attached at the burner hearth 103 that leans on mutually before and after having and front wall 102 outer walls and the two side angle inlay cards of the boiler of flow through shaft 101 are closed in the front wall and the both walls cornue 4 of this front wall 102 outer walls two inclines; Drum 10 conductings on front wall and both walls cornue 4 and front wall top; Front wall and both walls cornue 4 vertically are attached at boiler flow through shaft 101 rear outer walls and two side angle inlay cards are closed in this flow through shaft and both walls cornue 30 are conducted to flow through shaft 101 rear outer walls two inclines together through communicating pipe 9; Front wall and both walls cornue 4 and to flow through shaft and both walls cornue 30 respectively with the burner hearth of the front wall fin panel casing next part case 2 of front wall 102 outer wall bottoms and outer wall bottom, burner hearth 103 rear after 40 conductings of wall fin panel casing next part case; The top of the burner hearth 103 that flow through shaft 101 the place aheads are leaned on mutually is disposed with wall fin panel casing upper collecting chamber 19 behind burner hearth front wall fin panel casing upper collecting chamber 18 and the burner hearth in proper order by front and back; Wall fin panel casing upper collecting chamber 19 is conducted with the back with the preceding level communicating pipe 17 separately through pipeline respectively level communicating pipe 21 behind burner hearth front wall fin panel casing upper collecting chamber 18 and the burner hearth; And preceding level communicating pipe 17 was conducted with the preceding vertical connection pipe 15 of the side wall front portion, the left and right sides that is distributed in boiler and the back vertical connection pipe 26 at side wall rear portion, the left and right sides respectively with back level communicating pipe 21; Have side wall gusset 30 on this left and right sides side wall; Preceding vertical connection pipe 15 and of side wall fin panel casing next part case 1 connection of back vertical connection pipe 26 with the setting of left and right sides side wall below; And the side wall fin panel casing upper collecting chamber 14 that above the side wall of the left and right sides of boiler, is provided with is connected with drum 10; The top of drum 10 and wall membrane wall next part case 38 behind the flow through shaft is connected with last vertical connection pipe 33 conductings through last level communicating pipe 13 successively to flow through shaft 101 wall belows, back; To below the rear outer wall of flow through shaft 101 to flow through shaft after wall membrane wall next part case 38 with to flow through shaft after wall fin panel casing 29 be connected; First order economizer 31, second level economizer 34 and third level economizer 36 have been arranged in series connection connection on the wall fin panel casing 29 behind the flow through shaft, wall fin panel casing 29 behind the flow through shaft also has been communicated with the furnace roof outlet collection case 20 at boiler top.The heating surface of described first order economizer 31, second level economizer 34 and third level economizer 36 is flag formula structure heating surface.Described front wall and both walls cornue 4, side wall gusset 30 and flow through shaft 101 back walls are constituted self supporting structures, the flow direction of their internal water be all descend mobile.The top and bottom of the burner hearth front wall pattern water-cooling wall 6 in the described boiler are connected with burner hearth front wall fin panel casing upper collecting chamber 18 and front wall fin panel casing next part case 2 respectively; The top and bottom of back wall fin panel casing 28 are respectively with wall fin panel casing next part case 40 conductings behind wall fin panel casing upper collecting chamber behind the burner hearth 19 and the burner hearth; The top and bottom of side wall pattern water-cooling wall 7 are respectively with side wall fin panel casing upper collecting chamber 14 and 1 conducting of side wall fin panel casing next part case; Respectively with furnace roof outlet collection case 20 with to wall membrane wall next part case 38 conductings behind the flow through shaft, the heating surface of the heating surface of burner hearth front wall pattern water-cooling wall 6, back wall fin panel casing 28, the heating surface of side wall pattern the water-cooling wall 7 and heating surface of flow through shaft fin panel casing 29 all risen flows to flow through shaft fin panel casing 29.Described two ends to wall membrane wall next part case 38 behind the flow through shaft all with to flow through shaft 101 back walls are connected with side wall gusset 30 mutually non-conduction formulas.Described the burner hearth 103 and working-medium water in the fin panel casing in the flow through shaft 101 all risen flows, and its all heating surface tube keeps not having descending and flows.
The operation principle of the utility model is: when the backwater of boiler is admitted to the backwater collection case 11 with the drum conducting; After distributing through hydrospace dividing plate 12 bottoms in the drum 10 through down-comer 3, front wall and both walls cornue 4 in the middle of the front wall, communicating pipe 9, wall behind the flow through shaft and side wall gusset 30 are distributed to wall fin panel casing next part case 40 behind front wall fin panel casing next part case 2 and the burner hearth respectively; Rise to flow through burner hearth front wall pattern water-cooling wall 6 and wall fin panel casing 28 then and absorb high-temperature flue gas liberated heat in the burner hearth 103; After being heated to preset temperature; Get into wall fin panel casing upper collecting chamber 19 behind burner hearth front wall fin panel casing upper collecting chamber 18 and the burner hearth respectively; Preceding level communicating pipe 17 through wall fin panel casing upper collecting chamber 19 behind burner hearth front wall fin panel casing upper collecting chamber 18 and the burner hearth and the back vertical connection pipe 26 of distributing to left and right sides side wall anterior vertical connection pipe 15 and side wall rear portion, the left and right sides level communicating pipe 21 is not heated to descend outside furnace wall and flows then; Left and right sides side wall fin panel casing next part case 1 is given in uniform distribution; Rise mobile through high-temperature flue gas liberated heat in the side wall pattern water-cooling wall 7 absorption burner hearths 103; After being heated to higher temperature; Get into side wall fin panel casing upper collecting chamber 14 respectively; And the top of remittance drum 10; In drum, mix the back through on distribute to wall membrane wall next part case 38 behind the flow through shaft level communicating pipe 13 with last vertical connection pipe 33; Through wall membrane wall next part case 38 behind the flow through shaft is distributed to flow through shaft fin panel casing 29, first order economizer 31, second level economizer 34 and third level economizer 36, through arrange three grades of economizers to flow through shaft after the non-complete closure plate perpendicular to the water screen tube center line of centre position welding in the wall monowall tube, account for 90% of circulation area in the pipe according to the cross-sectional area of closure plate; Only the side of waring oneself in front of a fire of water screen tube kept 10% bow-shaped area with cooling to flow through shaft after the water screen tube that rises of wall; Guaranteed 90% current through first order economizer 31, second level economizer 34 and third level economizer 36 with this, being risen in wall fin panel casing 29, first order economizer 31, second level economizer 34 and third level economizer 36 heat absorption backs behind the flow through shaft flows to furnace roof outlet collection case 20, and gets into hot-water boilers outlet collection casees 23 through vertical connection pipe 22; Backwater constantly absorbs heat through heating surfaces at different levels, reaches specified outlet hot water temperature and sends into pipe network; And when coal or solid fuels such as living beings or rubbish ignite in the burner hearth that fire grate 105, face arch 5 and the rear arch tube bank 35 of boiler bottom are formed, burning and after-flame; In addition; The solid particle that fugitive constituent that decomposites after the solid fuel drying and high-temperature flue gas carry gets into burner hearth 103 further burning and after-flame from burner hearth 103 bottoms; Pass to side wall pattern water-cooling wall 7 to the fuel combustion liberated heat through radiation heat transfer; Wall water-cooled Crust blocks pipe bundle 27 behind burner hearth front wall pattern water-cooling wall 6, wall fin panel casing 28 and the burner hearth; After the radiation and heat convection of wall water-cooled Crust blocks pipe bundle 27 behind the burner hearth; High-temperature flue gas is turned through the turning smoke-box and is got into convection current vertical shaft 101 after 180 °, transversal flow first order economizer 31, second level economizer 34 and third level economizer 36 successively, and flue gas exhanst gas outlet 39 from boiler after body is accomplished heat exchange is discharged.
Claims (6)
1. cornue water circulation structure; It is characterized in that: comprise vertically being attached at the burner hearth (103) that leans on mutually before and after having and (front wall of 101 boiler (102) outer wall and two side angle inlay cards close in the front wall and the both walls cornue (4) of this front wall (102) outer wall two inclines to flow through shaft; Drum (10) conducting on front wall and both walls cornue (4) and front wall top; Front wall and both walls cornue (4) vertically are attached at boiler flow through shaft (101) rear outer wall and two side angle inlay cards are closed in this flow through shaft and both walls cornue (30) are conducted to flow through shaft (101) rear outer wall two inclines together through communicating pipe (9); Front wall and both walls cornue (4) and to flow through shaft and both walls cornue (30) respectively with the burner hearth of the front wall fin panel casing next part case (2) of front wall (102) outer wall bottom and outer wall bottom, burner hearth (103) rear after wall fin panel casing next part case (40) conducting; The top of the burner hearth (103) that flow through shaft (101) the place ahead is leaned on mutually is disposed with wall fin panel casing upper collecting chamber (19) behind burner hearth front wall fin panel casing upper collecting chamber (18) and the burner hearth in proper order by front and back; Wall fin panel casing upper collecting chamber (19) is conducted with preceding level communicating pipe (17) and back level communicating pipe (21) separately through pipeline respectively behind burner hearth front wall fin panel casing upper collecting chamber (18) and the burner hearth; And preceding level communicating pipe (17) and back level communicating pipe (21) are conducted with the preceding vertical connection pipe (15) of the side wall front portion, the left and right sides that is distributed in boiler and the back vertical connection pipe (26) at side wall rear portion, the left and right sides respectively; Have side wall gusset (30) on this left and right sides side wall; Preceding vertical connection pipe (15) and back vertical connection pipe (26) are communicated with the side wall fin panel casing next part case (1) that side wall below in the left and right sides is provided with; And the side wall fin panel casing upper collecting chamber (14) that above the side wall of the left and right sides of boiler, is provided with is connected with drum (10); The top of drum (10) with to flow through shaft (101) back wall below conducting is connected with last vertical connection pipe (33) through last level communicating pipe (13) successively to wall membrane wall next part case (38) behind the flow through shaft; To the rear outer wall below of flow through shaft (101) to flow through shaft after wall membrane wall next part case (38) with to flow through shaft after wall fin panel casing (29) be connected; Wall fin panel casing (29) behind the flow through shaft is gone up the series connection connection arranged first order economizer (31), second level economizer (34) and third level economizer (36), wall fin panel casing (29) behind the flow through shaft also is communicated with the furnace roof outlet collection case (20) at boiler top.
2. cornue water circulation structure according to claim 1 is characterized in that: the heating surface of described first order economizer (31), second level economizer (34) and third level economizer (36) is flag formula structure heating surface.
3. according to claim 1 or the described cornue water circulation structure of claim 2; It is characterized in that: described front wall and both walls cornue (4), side wall gusset (30) and flow through shaft (101) back wall constituted self supporting structure, the flow direction of their internal water be all descend mobile.
4. according to claim 1 or the described cornue water circulation structure of claim 2; It is characterized in that: the top and bottom of the burner hearth front wall pattern water-cooling wall (6) in the described boiler are connected with burner hearth front wall fin panel casing upper collecting chamber (18) and front wall fin panel casing next part case (2) respectively; The top and bottom of back wall fin panel casing (28) are respectively with wall fin panel casing next part case (40) conducting behind wall fin panel casing upper collecting chamber (19) and the burner hearth behind the burner hearth; The top and bottom of side wall pattern water-cooling wall (7) are respectively with side wall fin panel casing upper collecting chamber (14) and side wall fin panel casing next part case (1) conducting; Respectively with furnace roof outlet collection case (20) with to wall membrane wall next part case (38) conducting behind the flow through shaft, the heating surface of the heating surface of burner hearth front wall pattern water-cooling wall (6), back wall fin panel casing (28), the heating surface of side wall pattern water-cooling wall (7) and the heating surface of flow through shaft fin panel casing (29) all risen flows to flow through shaft fin panel casing (29).
5. according to claim 1 or the described cornue water circulation structure of claim 2, it is characterized in that: described two ends to wall membrane wall next part case (38) behind the flow through shaft all with to flow through shaft (101) back wall are connected with the mutually non-conduction formula of side wall gusset (30).
6. according to claim 1 or the described cornue water circulation structure of claim 2; It is characterized in that: described burner hearth (103) and mobile to the whole risings of the interior working-medium water of the fin panel casing in the flow through shaft (101), and its all heating surface tube keeps nothing decline mobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202694930U CN202254307U (en) | 2011-07-27 | 2011-07-27 | Water-circulating structure for corner pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202694930U CN202254307U (en) | 2011-07-27 | 2011-07-27 | Water-circulating structure for corner pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202254307U true CN202254307U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202694930U Withdrawn - After Issue CN202254307U (en) | 2011-07-27 | 2011-07-27 | Water-circulating structure for corner pipe |
Country Status (1)
| Country | Link |
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| CN (1) | CN202254307U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374658A (en) * | 2011-07-27 | 2012-03-14 | 西安交通大学 | Angular pipe water circulating structure with complete forced upward flowing on heating surface |
| CN105318306A (en) * | 2014-08-04 | 2016-02-10 | 哈尔滨新东环保设备安装工程有限公司 | Two-drum settling chamber spraying denitration corner-tube boiler |
| CN104154661B (en) * | 2014-08-06 | 2017-02-01 | 西安交通大学 | Fuel oil and fuel gas angle pipe boiler structure for strengthening convection pipe screen through needle fins |
-
2011
- 2011-07-27 CN CN2011202694930U patent/CN202254307U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374658A (en) * | 2011-07-27 | 2012-03-14 | 西安交通大学 | Angular pipe water circulating structure with complete forced upward flowing on heating surface |
| CN105318306A (en) * | 2014-08-04 | 2016-02-10 | 哈尔滨新东环保设备安装工程有限公司 | Two-drum settling chamber spraying denitration corner-tube boiler |
| CN105318306B (en) * | 2014-08-04 | 2017-10-03 | 哈尔滨四方锅炉有限公司 | A kind of pair of drum expansion chamber sprays denitration corner tube boiler |
| CN104154661B (en) * | 2014-08-06 | 2017-02-01 | 西安交通大学 | Fuel oil and fuel gas angle pipe boiler structure for strengthening convection pipe screen through needle fins |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120530 Effective date of abandoning: 20130605 |
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| RGAV | Abandon patent right to avoid regrant |