CN101749689B - Evaporation cooling flue - Google Patents
Evaporation cooling flue Download PDFInfo
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- CN101749689B CN101749689B CN2008102332877A CN200810233287A CN101749689B CN 101749689 B CN101749689 B CN 101749689B CN 2008102332877 A CN2008102332877 A CN 2008102332877A CN 200810233287 A CN200810233287 A CN 200810233287A CN 101749689 B CN101749689 B CN 101749689B
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Abstract
The invention belongs to the field of heating techniques and relates to an evaporation cooling system, in particular to an evaporation cooling flue in steel plants. The evaporation cooling flue mainly comprises master water wall tubes and master water wall ribbed plates. In a local scope on the upper surface of the inner side of the inflection point of the converter evaporation cooling flue, multiple-layer cooling water tubes are added to the inner side of the master water wall; the multiple-layer cooling water tubes and the master water wall tubes on the outer-layer membrane water wall are arranged in a staggered mode; connecting fins are connected with the master water wall ribbed plates; and the multiple-layer tubes are connected with the distributing tube of the multiple-layer tubes. The invention can adapt to the working conditions of continuous abrasion by ferric oxide dust in the converter fume, prevent the ferric oxide dust in the converter fume from abrading the surface of the water wall of the converter evaporation flue and improve the heat transfer characteristic in the evaporation cooling pipeline. The invention has the advantage of convenient replacement and reduces the work load for the maintenance of the converter evaporation cooling flue. The invention has higher popularization and application value in the evaporation cooling flue for converter steelmaking.
Description
Technical field
The invention belongs to technical field of heating, relate to evaporated cooling system, particularly a kind of gasification cooling flue of steel mill.
Background technology
Oxygen top-blown converter flue evaporated cooling system (also claiming waste heat boiler) is one of visual plant of steelshop.Converter vapourization cooling system not only utilizes a large amount of steam of converter gas waste heat recovery, and help reclaiming a large amount of coal gas and iron oxide dirt, and it and pneumatic steelmaking production control system program are directly chain, its status of equipment directly influences the ordinary production of converter, that is to say that it is not only a kind of additional UTILIZATION OF VESIDUAL HEAT IN equipment, but participates in STEELMAKING PRODUCTION directly as the part of converter, so the converter waste heat boiler occupies crucial status at steel mill.
In Converter Oxigen Blowing process for making process, in converter gas, produce a large amount of iron oxide dirt, iron oxide dirt is along with converter gas enters in the gasification cooling flue.Because the needs of process for making in order to arrange the oxygen rifle, need to be provided with one above the converter evaporation cooling air flue fire door and turn round, and are arranged on usually on the gasification cooling flue section of moving.Because the flue gas that contains iron oxide dirt washes away converter evaporation cooling air flue, particularly, be easy to cause the wearing and tearing of water screen tube, thereby influence the service life of converter evaporation cooling air flue directly the washing away of side wall in the converter evaporation cooling air flue flex point.Because converter evaporation cooling air flue adopts the overall structure be welded into a circumference, if the partial water cold wall pipe is difficult to repair or replace because of booster takes place in wearing and tearing, accident such as leak.
Summary of the invention
The purpose of this invention is to provide a kind of gasification cooling flue.Mainly comprise main water screen tube and main water-cooling wall floor, in the inside upper surface subrange of converter evaporation cooling air flue flex point, increase cooling water pipe multilayer stringing in the inboard of main water-cooling wall, the main water screen tube interlaced arrangement of cooling water pipe multilayer stringing and outer fin panel casing, utilize the connection fin to be connected with main water-cooling wall floor, the multilayer stringing is connected with multilayer stringing sparge pipe.The present invention can adapt to the condition of work that iron oxide dirt washes away continuously in the converter gas, avoid of the wearing and tearing of the interior iron oxide dirt of converter gas to converter evaporated flue water-cooling wall wall, and improve the interior heat-transfer character of vaporization cooling pipe, it is convenient to change, and reduces the maintenance workload of converter evaporation cooling air flue.
The present invention relates to a kind of new construction of steelwork converter gasification cooling flue, adopt the converter evaporation cooling air flue of multilayer stringing, avoid containing of the wearing and tearing of the converter gas of iron oxide dirt, and improve the heat-transfer character in the vaporization cooling pipe, reduce maintenance workload converter evaporated flue water-cooling wall wall.
Purpose of the present invention and task realize by the following technical solutions: the upper surface local location in converter evaporation cooling air flue flex point inboard adopts the laminates tubular construction.The multilayer stringing that increases is arranged in main water-cooling wall inboard, the pipe interlaced arrangement of cooling water pipe that increases newly and outer fin panel casing, newly-increased water screen tube can be welded in groups by plurality of tubes and fin, also can single independent layout, and between outer membrane formula water-cooling wall and newly-increased water screen tube, be connected with fin.Newly-increased water screen tube adopts the cannula type structure to insert in the gasification cooling flue, only need weld cooling water pipe again during replacing, does not need to cut fin or does weld seam again, has reduced maintenance load.
Operating experience shows, the upper surface of converter evaporation cooling air flue flex point inboard owing to be subjected to contains directly the washing away of flue gas of iron oxide dirt, it is the most serious to wear and tear, and therefore can adopt the laminates tubular construction at the upper surface local location of converter evaporation cooling air flue flex point inboard.The multilayer stringing that increases is arranged in main water-cooling wall inboard, when the flue gas that contains iron oxide dirt flows from the bottom up, directly washes away newly-increased water screen tube, and through the inhibition of newly-increased water screen tube to flue gas, the radially flow velocity of flue gas reduces greatly.By the machine cut theory as can be known; the energy that provides on the unit are is provided the overburden amount of the surface particles that is worn in the wear process; and the energy of wearing and tearing mainly is that flue gas offers iron oxide dirt; its energy becomes with the axial velocity of flue gas square; flue gas flow rate reduces the back souring of main water-cooling wall inside pipeline wall is obviously weakened, thereby has played the flue gas of protecting main water screen tube not contained iron oxide dirt directly to wash away and the effect of wearing and tearing.
Adopting the mode of welding fin to be connected between newly-increased water cooled pipeline and the main water-cooling wall, multilayer water-cooling wall stringing is become one, thereby strengthened the rigidity of converter evaporation cooling air flue, is favourable from structure to the mechanical property of improving gasification cooling flue.In addition, this structure has increased heat exchange area under the situation that does not increase converter evaporation cooling air flue length, helps the cooling of converter gas.
For fear of the deposition of iron oxide dirt on newly-increased water cooling tube and replacing, the minimizing maintenance load of conveniently newly-increased water screen tube, water screen tube newly-increased in the main water-cooling wall can be welded in groups by plurality of tubes and fin, also can single independent layout.The radical of every group of water composite cooling pipe generally was no more than 5 when water screen tube welded in groups, because interior side water wall tube is made into discontinuous structure, can reduce the accumulation dead angle of iron oxide dirt, avoided iron oxide dirt to deposit in a large number on water screen tube.Interior side water wall tube adopts discontinuous structure, the thermal stress that causes owing to temperature inequality between the inside and outside multilayer water-cooling wall in the time of can also reducing the converter evaporation cooling air flue operation.
The cannula type structure that adopts newly-increased water screen tube inserts in the gasification cooling flue, the sparge pipe of newly-increased water screen tube promptly is set outside converter evaporation cooling air flue, pick out one section cooling water pipe that stretches in the converter evaporation cooling air flue from sparge pipe, pass the fin of main water-cooling wall, extend in the converter evaporation cooling air flue as the multilayer stringing.Newly-increased cooling water pipe runs through the position of floor, the cooling water pipe of main water-cooling wall can be made into bending and allow the form of pipe.When adopting cannula structures,, can sever, take off inboard one group or a cooling water pipe and also burn-on again and get final product at the intubate place if inboard water screen tube weares and teares.The floor that does not need to sever water-cooling wall when changing cooling water pipe does not need to do long weld seam again yet, can reduce the maintenance workload when changing water-cooling wall.
Consider the condition of work of the cooling water pipe that increases newly, include it in the converter evaporation cooling air flue low-pressure water circulatory system or high pressure forced circulation system.
Description of drawings
Fig. 1 is a cross-sectional view of the present invention,
Fig. 2 is the stereogram of laminates cannula connection.
Among the figure, part 1 is main water screen tube, and part 2 is main water-cooling wall floors, and part 3 is multilayer stringings, and part 4 is multilayer stringing floors, and part 5 is to connect fin, and part 6 is multilayer stringing sparge pipes.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, among the figure be the version of taking two-layer stringing, every group of three cooling water pipes.
Connect main water-cooling wall floor 2 between the main water screen tube 1, increase cooling water pipe multilayer stringing 3 in the inboard of main water-cooling wall, the cooling water pipe multilayer stringing 3 that increases newly and main water screen tube 1 interlaced arrangement of outer fin panel casing, set up row's cooling water pipe multilayer stringing 3 among the figure altogether, newly-increased cooling water pipe multilayer stringing 3 per three utilize floor 4 to be welded into one group, and utilizing connection fin 5 to be connected with main water-cooling wall floor 2, multilayer stringing 3 is connected with multilayer stringing sparge pipe 6.
As shown in Figure 2: newly-increased cooling water pipe multilayer stringing 3 utilizes the intubate connection to insert main water-cooling wall inboard.When main water-cooling wall stringing was rarer, the mode of available Fig. 2 was arranged; When main water-cooling wall stringing was closeer, main water screen tube need be made the form of bend pipe.
Also can increase the above cooling water pipe of one deck as required newly, newly-increased water screen tube can be welded in groups by plurality of tubes and fin, also can single independent layout.
Upper surface local location in converter evaporation cooling air flue flex point inboard adopts the laminates tubular construction, and the multilayer stringing of increase is arranged in main water-cooling wall inboard.Adopt the gasification cooling flue of multilayer stringing, the converter gas that can avoid containing iron oxide dirt directly washes away the wearing and tearing that the gasification cooling flue inwall causes, and has increased the heat exchange area of converter evaporation cooling air flue.The cannula type structure that adopts newly-increased water screen tube inserts in the gasification cooling flue, and it is convenient to change, and has alleviated the maintenance workload of converter evaporation cooling air flue, has bigger advantage.Along with the development of domestic converter steeling technology and the raising of gasification cooling flue manufacture level,, in the pneumatic steelmaking gasification cooling flue, has higher popularizing value for condition has been created in the promotion and application of present technique.
Claims (3)
1. gasification cooling flue, mainly comprise main water screen tube (1) and main water-cooling wall floor (2), it is characterized in that: in the inside upper surface subrange of converter evaporation cooling air flue flex point, inboard at main water-cooling wall increases cooling water pipe multilayer stringing (3), main water screen tube (1) interlaced arrangement of cooling water pipe multilayer stringing (3) and outer fin panel casing, utilize connection fin (5) to be connected with main water-cooling wall floor (2), multilayer stringing (3) is connected with multilayer stringing sparge pipe (6).
2. according to the described gasification cooling flue of claim 1, it is characterized in that: (3) 1～5 pipes of multilayer stringing and multilayer stringing floor (4) welding are arranged in groups.
3. according to the described gasification cooling flue of claim 1, it is characterized in that: multilayer stringing (3) adopts the cannula type structure to insert in the gasification cooling flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102332877A CN101749689B (en) | 2008-12-10 | 2008-12-10 | Evaporation cooling flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102332877A CN101749689B (en) | 2008-12-10 | 2008-12-10 | Evaporation cooling flue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101749689A CN101749689A (en) | 2010-06-23 |
| CN101749689B true CN101749689B (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102332877A Active CN101749689B (en) | 2008-12-10 | 2008-12-10 | Evaporation cooling flue |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986057B (en) * | 2015-01-29 | 2017-10-20 | 江苏永钢集团有限公司 | A kind of gasification cooling flue heat pipe replacing options |
| CN107975781B (en) * | 2016-10-25 | 2020-04-24 | 江苏道和环保科技有限公司 | Deep waste heat recovery boiler of converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4418652A (en) * | 1981-09-15 | 1983-12-06 | Sulzer Brothers Limited | Steam generator having a superheater tube bank |
| FR2597576A1 (en) * | 1986-04-22 | 1987-10-23 | Mediterranee Const Navales Ind | Improvements to the manufacture of the walls of the chambers, particularly the combustion chambers, of steam generators |
| CN2481990Y (en) * | 2001-06-15 | 2002-03-13 | 清华大学 | High strength film type water-cooled wall for boiler |
-
2008
- 2008-12-10 CN CN2008102332877A patent/CN101749689B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4418652A (en) * | 1981-09-15 | 1983-12-06 | Sulzer Brothers Limited | Steam generator having a superheater tube bank |
| FR2597576A1 (en) * | 1986-04-22 | 1987-10-23 | Mediterranee Const Navales Ind | Improvements to the manufacture of the walls of the chambers, particularly the combustion chambers, of steam generators |
| CN2481990Y (en) * | 2001-06-15 | 2002-03-13 | 清华大学 | High strength film type water-cooled wall for boiler |
Non-Patent Citations (2)
| Title |
|---|
| 周一工.炼钢转炉汽化冷却烟道结构设计中几个应注意的问题.《冶金动力》.1997,(第5期),第48-50页. * |
| 张兴芳等.大型汽化冷却烟道制造的关键工艺.《工业锅炉》.1997,(第50期),第38-40页. * |
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| Publication number | Publication date |
|---|---|
| CN101749689A (en) | 2010-06-23 |
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