CN110017464B - 600MW power station boiler is reformed transform - Google Patents
600MW power station boiler is reformed transform Download PDFInfo
- Publication number
- CN110017464B CN110017464B CN201910137671.5A CN201910137671A CN110017464B CN 110017464 B CN110017464 B CN 110017464B CN 201910137671 A CN201910137671 A CN 201910137671A CN 110017464 B CN110017464 B CN 110017464B
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- hearth
- fixedly connected
- furnace
- deformation preventing
- rods
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- 238000001816 cooling Methods 0.000 claims abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 45
- 230000002787 reinforcement Effects 0.000 claims description 15
- 239000003245 coal Substances 0.000 abstract description 8
- 239000002956 ash Substances 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 239000010881 fly ash Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 description 16
- 230000009466 transformation Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000002893 slag Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M20/00—Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames
Abstract
A modified 600MW power station boiler comprises a hearth lower part ash cooling hopper and a burner of an original 600MW power station boiler, a hearth upper part except the hearth lower part ash cooling hopper and the burner of the original 600MW power station boiler, and a hearth middle part which separates the hearth lower part from the hearth upper part and then is added; the elevation of the lower part of the hearth, namely the elevation of the dividing surface of the lower part of the hearth and the upper part of the hearth is 21.2 meters, and the height of the middle part of the hearth is 2 meters; the upper end in the middle of the hearth is fixedly connected with the lower end at the upper part of the hearth, the lower end in the middle of the hearth is fixedly connected with the lower part of the hearth, and the inner structure in the middle of the hearth is identical with the original inner structure at the lower end at the upper part of the hearth. The hearth Rong Jire load is reduced due to the increase of the hearth volume due to the change of the hearth height, the hearth slagging condition is well improved, and the method has great significance in reducing the fly ash carbon content of the boiler, reducing the NOx standard emission and improving the operation safety of the boiler and the coal adaptability.
Description
Technical Field
The invention relates to a modified coal-fired power station boiler.
Background
The coal-fired power station boiler is a key device of the coal-fired power station, and is directly related to the quality and the use efficiency of the coal which can be adopted. The first-stage first-unit boiler of the North-and-lan power plant is a 600MW subcritical unit boiler designed and manufactured by the original American combustion engineering company [ CE company ] at the end of 80 s, a hearth is extremely easy to slag, an oversized accident occurs in the initial operation stage due to slag bonding, the problem of slag bonding of the hearth cannot be effectively solved by conventional transformation, and the problem cannot be successfully solved by referring to the patent transformation technology of the related coal-fired power plant boiler, so that the power plant is not dared to adopt more economic coal quality for a long time, and how to transform the coal quality so as to adopt the more economic coal quality, and further the use efficiency is improved, so that the power plant becomes an important task.
Disclosure of Invention
The invention mainly aims to technically reform the first-stage first-coal-fired power plant unit boiler of the North-energy power plant so that the first-stage first-coal-fired power plant unit boiler can adopt more economic coal quality, and further, the use efficiency is improved.
The technical scheme adopted by the invention is as follows: a modified 600MW power station boiler comprises a hearth lower part ash cooling hopper and a burner of an original 600MW power station boiler, a hearth upper part except the hearth lower part ash cooling hopper and the burner of the original 600MW power station boiler, and a hearth middle part which separates the hearth lower part from the hearth upper part and then is added; the elevation of the lower part of the hearth, namely the elevation of the dividing surface of the lower part of the hearth and the upper part of the hearth is 21.2 meters, and the height of the middle part of the hearth is 2 meters; the upper end in the middle of the hearth is fixedly connected with the lower end at the upper part of the hearth, the lower end in the middle of the hearth is fixedly connected with the lower part of the hearth, and the inner structure in the middle of the hearth is identical with the original inner structure at the lower end at the upper part of the hearth.
The boiler furnace width of the first-stage first-unit boiler of the North Lung power plant is 19.558m, and the furnace depth is 16.4325m. The invention is technically modified according to the following modification scheme: firstly, an original power station boiler is divided into a lower part of a furnace and an upper part of the furnace, then the middle part of the furnace is inserted between the upper part of the furnace and the lower part of the furnace, and the internal structure of the middle part of the furnace is identical with the original internal structure of the lower end of the upper part of the furnace, namely, the whole body after the middle part of the furnace and the upper part of the furnace are fixedly connected together is equivalent to the result that the upper part of the furnace directly extends downwards for 2 meters. Through such technological transformation, furnace height changes, and inside overall structure is unchangeable, and furnace section heat load and the regional heat load of combustor remain current level, and volume heat load reduces because of furnace volume increases, and furnace slagging condition has fine improvement, has very big meaning to the boiler reduces fly ash carbon content, reduction Nox emission up to standard and to improving boiler operation security and coal adaptability.
Preferably, the upper end of the lower part of the hearth is provided with a crane hook connecting part for hoisting the lower part of the hearth. According to the preferable scheme, the lower part of the hearth is firstly integrally adjusted away from the original position and then is dug downwards to a corresponding depth, and then the lower part of the hearth is dropped and put back to be placed well, so that the transformation of the upper part of a factory building can be avoided, the integral transformation scheme is easy to implement, and the transformation cost is relatively low.
Further preferably, each crane hook connection comprises two lifting lugs. The preferred scheme has reasonable structure and high use safety.
It is also further preferable that two lateral reinforcing members are provided between the left and right inner side surfaces of the upper end of the lower portion of the furnace. Still further preferably, an oblique reinforcement is respectively arranged between the middle part of the front transverse reinforcement and the rear transverse reinforcement and the left side surface and the right side surface of the lower part of the hearth; a longitudinal reinforcement is arranged between the middle parts of the front transverse reinforcement and the rear transverse reinforcement and the corresponding front side surface and rear side surface of the lower part of the hearth. The transverse reinforcing piece, the inclined reinforcing piece, the longitudinal reinforcing piece and the corresponding side surfaces of the lower part of the hearth are removed before being fixedly connected with the lower end of the middle part of the hearth and the upper end of the lower part of the hearth. According to the preferable scheme, when the lower part of the hearth is lifted, the lower part of the hearth is not easy to deform.
Preferably, four side surfaces of the lower end of the upper part of the hearth are fixedly provided with an upper anti-deformation rod respectively, and the corresponding end parts of the four upper anti-deformation rods are fixedly connected together; four side surfaces of the upper end of the middle part of the hearth are respectively fixedly provided with a middle part upper end deformation preventing rod, four side surfaces of the lower end of the middle part of the hearth are respectively fixedly provided with a middle part lower end deformation preventing rod, and corresponding end parts of the four middle part upper end deformation preventing rods and corresponding end parts of the four middle part lower end deformation preventing rods are fixedly connected together; four side surfaces of the upper end of the lower part of the hearth are respectively fixedly provided with a lower anti-deformation rod, and the corresponding ends of the four lower anti-deformation rods are fixedly connected together. The preferable scheme can effectively prevent the deformation of the upper part of the hearth, the middle part of the hearth and the lower part of the hearth in the lifting process, and is beneficial to the connection of the upper part of the hearth, the middle part of the hearth and the lower part of the hearth. During this period, after each part is lifted, the structure that prevents the part from being connected with the next member and the structure that is irrelevant to the production work should be removed.
In summary, the beneficial effects of the invention are as follows: by modifying the original boiler, the height of the hearth is changed, the load of the hearth Rong Jire is reduced due to the increase of the volume of the hearth, the slagging condition of the hearth is improved well, and the method has great significance in reducing the carbon content of fly ash, reducing the NOx standard emission of the boiler and improving the operation safety and the coal adaptability of the boiler.
Drawings
Fig. 1: a schematic front view of the lower part of the hearth;
fig. 2: side view schematic diagram of the lower part of the hearth;
fig. 3: schematic plan view of the lower part of the hearth;
FIG. 4 is a front view of a lower lifting lug of the hearth;
FIG. 5 is a side view of a lower lifting lug of the furnace;
FIG. 6 is a top view of a lower lifting lug of the hearth;
FIG. 7 is a schematic view of the connection structure of the lower lifting lug and the lower deformation preventing rod of the hearth;
in the figure: lower furnace portion 1, lower part indulge shape pole 2, lower part violently prevent shape pole 3, lower part lug 4, lower part lug board 4.1, lower part lug curb plate 4.2, lower part lug hanging hole 4.3, lower reinforcing plate 4.4, horizontal reinforcement 4.5, oblique reinforcement 4.6, indulge reinforcement 4.7, first additional connecting plate 4.8, first additional trapezoidal reinforcing plate 4.9, second additional connecting plate 4.10, second additional trapezoidal reinforcing plate 4.11, third reinforcing plate 4.12.
Detailed Description
The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings.
As shown in fig. 1-7, the invention comprises a lower furnace cooling ash bucket and a lower furnace 1 with a burner of the original 600MW power station boiler, a lower furnace upper part of the original 600MW power station boiler except the lower furnace cooling ash bucket and the lower furnace with the burner, which are not shown in the drawing, and a middle furnace which is not shown in the drawing and is added by hoisting after separating the lower furnace part and the upper furnace. The elevation of the lower part 1 of the hearth, namely the elevation of the dividing surface of the lower part of the hearth and the upper part of the hearth is 21.2 meters, and the height of the middle part of the hearth is 2 meters. The upper end of the lower part of the hearth is provided with a lower hook connecting part of a crane for lifting the lower part of the hearth, and the upper end of the middle part of the hearth is provided with a middle hook connecting part of the crane for lifting and moving the hearth.
Before dividing the lower part 1 of the hearth and the upper part of the hearth, in order to prevent the lower part 1 of the hearth from deforming when the lower part 1 of the hearth is hoisted, a lower deformation preventing rod is fixedly arranged on each of four sides of the upper end of the lower part of the hearth of the lower part 1 of the hearth, and the corresponding ends of the four lower deformation preventing rods are fixedly connected together. The four lower deformation prevention rods are all composed of corresponding I-shaped steel, wherein the left lower longitudinal deformation prevention rod 2 and the right lower longitudinal deformation prevention rod 2 are formed steel H1000 multiplied by 500 multiplied by 30 multiplied by 36mm, the front lower transverse deformation prevention rod 3 and the rear lower transverse deformation prevention rod 3 are formed steel H588 multiplied by 300 multiplied by 12 multiplied by 20mm, and the upper surface of the lower longitudinal deformation prevention rod 2 and the lower transverse deformation prevention rod 3 are horizontal and flush. The lower hook connecting parts of the lifting machine are all around, and each lower hook connecting part of the lifting machine comprises two lower lifting lugs 4; the lower lifting lug 4 comprises a lower lifting lug plate 4.1 and a lower lifting lug side plate 4.2, and a lower lifting lug hanging hole 4.3 used for being connected with a hanging hook of a crane which is not shown in the figure is formed in the lower lifting lug plate 4.1. Each lower lifting lug plate 4.1 and two lower lifting lug side plates 4.2, the lower ends of the lower lifting lug plates 4.1 and the lower lifting lug side plates 4.2 are fixedly connected with the upper surfaces of the left lower longitudinal deformation preventing rods 2 and the right lower longitudinal deformation preventing rods 2. The furnace is characterized by further comprising a plurality of lower reinforcing plates 4.4, wherein the lower surfaces of the left and right lower longitudinal deformation preventing rods 2 are fixedly connected with the upper ends of the lower reinforcing plates 4.4, and the side wall of the lower part 1 of the furnace is fixedly connected with the lower reinforcing plates 4.4. Two transverse reinforcing pieces 4.5 are arranged between the left inner side surface and the right inner side surface of the upper end of the lower part of the hearth, an oblique reinforcing piece 4.6 is respectively arranged between the middle parts of the front transverse reinforcing piece and the rear transverse reinforcing piece and between the left side surface and the right side surface of the lower part of the hearth, and a longitudinal reinforcing piece 4.7 is arranged between the middle parts of the front transverse reinforcing piece and the rear transverse reinforcing piece and between the middle parts and the rear transverse reinforcing piece and the front transverse reinforcing piece. The transverse reinforcement in the embodiment is a steel pipe phi 315 multiplied by 12mm, and the inclined reinforcement 4.6 and the longitudinal reinforcement 4.7 are both steel pipes phi 219 multiplied by 6mm. The arrangement of the structures and dimensions of the lower vertical deformation preventing rod 2, the lower horizontal deformation preventing rod 3, the lower lifting lug 4, the horizontal reinforcing member 4.5, the inclined reinforcing member 4.6, the vertical reinforcing member 4.7 and the like mainly depends on the reason that the weight of the lower part 1 of the hearth is as high as 578 tons. Further preferably, a plurality of first additional connecting plates 4.8 are fixedly connected to the lower longitudinal deformation prevention rod 2, each first additional connecting plate 4.8 is fixedly connected with the lower longitudinal deformation prevention rod 2 and a plurality of first additional trapezoidal reinforcing plates 4.9 at the same time, wherein the size of the first additional connecting plates 4.8 corresponding to the lower lifting lug 4 is larger than that of other positions, and after the first additional connecting plates 4.8 and the first additional trapezoidal reinforcing plates 4.9 are fixedly connected with the lower longitudinal deformation prevention rod 2, the first additional connecting plates 4.8 are fixedly connected with the lower part of the hearth, so that the lower longitudinal deformation prevention rod 2 and the lower part of the hearth are fixedly connected; similarly, a plurality of second additional connecting plates 4.10 are fixedly connected to the lower transverse deformation prevention rod 3, each second additional connecting plate 4.10 and the lower transverse deformation prevention rod 3 are simultaneously fixedly connected with the second additional trapezoidal reinforcing plates 4.11, the lower transverse deformation prevention rod 3 is also simultaneously fixedly connected with a plurality of third reinforcing plates 4.12, and after the second additional connecting plates 4.10, the second additional trapezoidal reinforcing plates 4.11 and the third reinforcing plates 4.12 are fixedly connected with the lower transverse deformation prevention rod 3, the second additional connecting plates 4.10 are fixedly connected with the lower part of the hearth, so that the lower transverse deformation prevention rod 3 and the lower part of the hearth are fixedly connected.
The four sides of the lower end of the upper part of the hearth are respectively fixedly provided with an upper anti-deformation rod, the corresponding ends of the four upper anti-deformation rods are fixedly connected together, and the structure and the size of the four upper anti-deformation rods are determined according to the integral weight of the upper part of the hearth multiplied by a proper safety coefficient. Specific structural details are not described herein. Each upper deformation preventing rod and the upper part of the hearth can be provided with a plurality of additional reinforcing plates and other structures like the lower part of the hearth, and specific details are not repeated here.
The four side surfaces of the upper end of the middle part of the hearth are respectively fixedly provided with a middle part upper end deformation preventing rod, the four side surfaces of the lower end of the middle part of the hearth are respectively fixedly provided with a middle part lower end deformation preventing rod, and the corresponding end parts of the four middle part upper end deformation preventing rods and the corresponding end parts of the four middle part lower end deformation preventing rods are fixedly connected together. And the upper end of the middle part of the hearth is also provided with a lower hook connecting part of the lifting cranes everywhere, the lower hook connecting part of each lifting crane is provided with a corresponding lifting lug, and the upper end of the middle part of the hearth is also provided with a transverse reinforcing part, an oblique reinforcing part and a longitudinal reinforcing part just like the upper end of the lower part of the hearth. Specific structural details are not described herein. Similarly, the upper end of the middle part of the furnace may also be provided with additional reinforcing plates and other structures identical to those of the upper end of the lower part of the furnace, and details thereof will not be described herein.
The upper end in the middle of the hearth is fixedly connected with the lower end at the upper part of the hearth, the lower end in the middle of the hearth is fixedly connected with the lower part of the hearth, and the inner structure in the middle of the hearth is identical with the original inner structure at the lower end at the upper part of the hearth.
The above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the specific structures and the scope of the present invention. Indeed, equivalent variations on the shape, construction and design purposes described in accordance with the present invention may be made. Therefore, all changes in shape, structure and design that come within the meaning and range of equivalency of the invention are to be embraced within their scope.
Claims (7)
1. A modified 600MW utility boiler, characterized by: the boiler comprises a hearth lower part ash cooling hopper of an original 600MW power station boiler, a hearth lower part of a combustor, a hearth upper part of the original 600MW power station boiler except for the hearth lower part ash cooling hopper and the hearth lower part of the combustor, and a hearth middle part which is added by hoisting after separating the hearth lower part and the hearth upper part; the elevation of the lower part of the hearth, namely the elevation of the dividing surface of the lower part of the hearth and the upper part of the hearth is 21.2 meters, and the height of the middle part of the hearth is 2 meters; the upper end at furnace middle part and the lower extreme on furnace upper portion link firmly, and the lower extreme at furnace middle part links firmly with the furnace lower part, and the inner structure at furnace middle part is the same with the former inner structure of the lower extreme at furnace upper portion, and four sides of the upper end at furnace lower part have respectively set firmly a lower part shape pole that preapring for an unfavorable turn of events, and the corresponding tip of four lower part shape poles that preapring for an unfavorable turn of events links firmly together, and lower part shape pole is including controlling two lower parts and indulging shape pole and two lower part violently preapring for an unfavorable turn of events around, and the upper surface of shape pole is indulging shape pole and the horizontal shape pole of preapring for an unfavorable turn of events of lower part is horizontal and flush.
2. A retrofit 600MW utility boiler according to claim 1, characterized in that: the upper end of furnace lower part is equipped with the lifting machine couple connecting portion that is used for lifting by crane furnace lower part, and lifting machine couple connecting portion includes two lower part lugs, and lower part lug includes lower part lug board and lower part lug curb plate, is equipped with lower part lug hanging hole on the lower part lug board.
3. A retrofit 600MW utility boiler according to claim 2, characterized in that: the lower hook connecting part of the crane further comprises a plurality of lower reinforcing plates, the lower surfaces of the left lower vertical deformation preventing rods and the right lower vertical deformation preventing rods are fixedly connected with the upper ends of the lower reinforcing plates, the side wall of the lower part of the hearth is fixedly connected with the lower reinforcing plates, a plurality of first additional connecting plates are fixedly connected to the lower vertical deformation preventing rods, a plurality of second additional connecting plates are fixedly connected to the lower horizontal deformation preventing rods, the second additional connecting plates and the lower horizontal deformation preventing rods are fixedly connected to the second additional trapezoidal reinforcing plates, the lower horizontal deformation preventing rods are fixedly connected to a plurality of third reinforcing plates, and the second additional connecting plates, the second additional trapezoidal reinforcing plates and the third reinforcing plates are fixedly connected to the lower horizontal deformation preventing rods, so that the second additional connecting plates are fixedly connected to the lower part of the hearth, and the lower horizontal deformation preventing rods and the lower part of the hearth are fixedly connected.
4. A retrofit 600MW utility boiler according to claim 2, characterized in that: two transverse reinforcing pieces are arranged between the left inner side surface and the right inner side surface of the upper end of the lower part of the hearth.
5. A retrofit 600MW utility boiler according to claim 3, characterized in that: and an inclined reinforcing piece is respectively arranged between the middle parts of the front transverse reinforcing piece and the rear transverse reinforcing piece and the left side surface and the right side surface of the lower part of the hearth.
6. A retrofit 600MW utility boiler according to claim 3, characterized in that: a longitudinal reinforcement is arranged between the middle parts of the front transverse reinforcement and the rear transverse reinforcement and the corresponding front side surface and rear side surface of the lower part of the hearth.
7. A retrofitted 600MW utility boiler according to any of claims 1-6 and wherein: four side surfaces of the lower end of the upper part of the hearth are fixedly provided with an upper anti-deformation rod respectively, and the corresponding end parts of the four upper anti-deformation rods are fixedly connected together; four sides of the upper end of the middle part of the hearth are respectively fixedly provided with a middle part upper end deformation preventing rod, four sides of the lower end of the middle part of the hearth are respectively fixedly provided with a middle part lower end deformation preventing rod, and corresponding ends of the four middle part upper end deformation preventing rods and corresponding ends of the four middle part lower end deformation preventing rods are fixedly connected together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137671.5A CN110017464B (en) | 2019-02-25 | 2019-02-25 | 600MW power station boiler is reformed transform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137671.5A CN110017464B (en) | 2019-02-25 | 2019-02-25 | 600MW power station boiler is reformed transform |
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| Publication Number | Publication Date |
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| CN110017464A CN110017464A (en) | 2019-07-16 |
| CN110017464B true CN110017464B (en) | 2024-04-05 |
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| CN201910137671.5A Active CN110017464B (en) | 2019-02-25 | 2019-02-25 | 600MW power station boiler is reformed transform |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818258A (en) * | 2012-08-30 | 2012-12-12 | 上海锅炉厂有限公司 | Boiler large-chamfer four-corner tangential firing technology and furnace arrangement method |
| CN103968413A (en) * | 2014-03-28 | 2014-08-06 | 广东电网公司电力科学研究院 | Method for acquiring combustion characteristics under different loads after boiler improvement |
| CN210153762U (en) * | 2019-02-25 | 2020-03-17 | 国电浙江北仑第一发电有限公司 | Reform transform 600MW power plant boiler |
-
2019
- 2019-02-25 CN CN201910137671.5A patent/CN110017464B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818258A (en) * | 2012-08-30 | 2012-12-12 | 上海锅炉厂有限公司 | Boiler large-chamfer four-corner tangential firing technology and furnace arrangement method |
| CN103968413A (en) * | 2014-03-28 | 2014-08-06 | 广东电网公司电力科学研究院 | Method for acquiring combustion characteristics under different loads after boiler improvement |
| CN210153762U (en) * | 2019-02-25 | 2020-03-17 | 国电浙江北仑第一发电有限公司 | Reform transform 600MW power plant boiler |
Non-Patent Citations (1)
| Title |
|---|
| 新疆宜化2×330 MW机组锅炉结焦分析及处理;祁元堂等;青海电力;第33卷(第4期);59-60 * |
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