CN112795771A - Mist cooler, stainless steel continuous annealing cooling system and cooling method thereof - Google Patents
Mist cooler, stainless steel continuous annealing cooling system and cooling method thereof Download PDFInfo
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- CN112795771A CN112795771A CN202011609273.8A CN202011609273A CN112795771A CN 112795771 A CN112795771 A CN 112795771A CN 202011609273 A CN202011609273 A CN 202011609273A CN 112795771 A CN112795771 A CN 112795771A
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- 238000001816 cooling Methods 0.000 title claims abstract description 141
- 239000003595 mist Substances 0.000 title claims abstract description 50
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 15
- 239000010935 stainless steel Substances 0.000 title claims abstract description 15
- 238000000137 annealing Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 87
- 239000010959 steel Substances 0.000 claims abstract description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000005406 washing Methods 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims description 40
- 239000007924 injection Substances 0.000 claims description 40
- 238000005507 spraying Methods 0.000 claims description 25
- 239000007921 spray Substances 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 12
- 239000000498 cooling water Substances 0.000 claims description 7
- 206010010904 Convulsion Diseases 0.000 claims description 4
- 230000036461 convulsion Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 239000002912 waste gas Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000779 smoke Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 15
- 238000011010 flushing procedure Methods 0.000 description 13
- 239000000428 dust Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5735—Details
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention provides a mist cooler, a stainless steel continuous annealing cooling system and a cooling method thereof. The fog cooler includes the stove outer covering, air jet system, atomizer, washing unit, bearing roller and defogging device, air jet system sets up in the stove outer covering, be used for the many highly-compressed air areas that extend along steel band width direction of upper and lower surface difference blowout for the steel band, atomizer sets up in the stove outer covering, be used for the upper and lower surface difference blowout of steel band along a plurality of toper water smoke curtains of steel band width direction interval distribution, fog system spun water smoke is gathered in the hydrologic cycle inslot, washing unit sets up in the stove outer covering and is located between air jet system and the hydrologic cycle groove, the bearing roller rotationally sets up in the output of stove outer covering, defogging device sets up in the position that stove outer covering one side is close to its bottom. This fog cooler sets up between air cooling section and water-cooling section, and this fog cooler adopts air cooling and water-cooling mixed mode, can improve air cooling effect, improves cooling control ratio.
Description
Technical Field
The invention relates to the technical field of stainless steel cooling, in particular to a mist cooler, a stainless steel continuous annealing cooling system and a cooling method thereof.
Background
The annealing pickling line (annealingdpicklingine/APL) heating process employs a direct flame heating furnace for softening material that has previously hardened as a result of the rolling process. The surface oxide layer produced by the annealing process in an oxygen-filled environment will be removed in a subsequent on-line pickling process, resulting in a clean, oxide-free surface. The steel strip may be sold as a final product or may be further used as a material for cold rolling. After heating, the steel strip is cooled in a cooling section by adopting a convection mode, and for different products, the cooling mode of an APL furnace section can be a mixed mode of air cooling, water cooling or air cooling and water cooling (fog cooling). The prior art adopts full air cooling or full water cooling, and the cooling effect of the full air cooling or the full water cooling is not ideal. The air cooling and water cooling refers to a mode of one-section air cooling and one-section water cooling, and the problems of large air cooling dust and unsatisfactory cooling effect exist in the air cooling section.
Disclosure of Invention
In view of the above, the present invention needs to provide a mist cooler disposed between an air cooling section and a water cooling section, wherein the mist cooler adopts a mixed mode of air cooling and water cooling, and can improve the cooling effect of air cooling and the cooling control ratio.
The technical scheme adopted by the invention is as follows:
a fog cooler comprises a furnace shell, an air injection device, an atomizing device, a flushing device, a carrier roller and a demisting device, wherein a cooling cavity is formed in the furnace shell, a water circulation groove is formed in the bottom of the furnace shell, a steel strip input port and an output port are respectively formed in two ends of the furnace shell, the air injection device is arranged in the furnace shell and is used for respectively ejecting a plurality of high-pressure air strips extending along the width direction of a steel strip for the upper surface and the lower surface of the steel strip, the atomizing device is arranged in the furnace shell and is used for respectively ejecting a plurality of conical water fog curtains distributed at intervals along the width direction of the steel strip for the upper surface and the lower surface of the steel strip, the plurality of conical water fog curtains are arranged in a line to form a water fog array, the water fog array is arranged at intervals along the length direction of the steel strip, the plurality of water fog arrays are respectively positioned at intervals of the plurality of high-pressure air strips, the water fog ejected by the, the support roller is rotatably arranged at the output end of the furnace shell to support and convey the steel strip, and the demisting device is arranged at a position close to the bottom of the furnace shell on one side of the furnace shell to discharge cooled waste gas and mist.
Further, the air injection device comprises an upper air injection pipe and a lower air injection pipe which are arranged in the furnace shell and positioned above the water circulation groove, the upper air injection pipe and the lower air injection pipe are provided with a plurality of roots, each upper air injection pipe and each lower air injection pipe are correspondingly arranged, and the bottom of the upper air injection pipe and the top of the lower air injection pipe are provided with an air injection seam.
Furthermore, the width of the jet gap is 7mm, the length of the jet gap is 1500mm, and the distance between the upper jet pipe and the lower jet pipe is 210 mm.
Furthermore, one sections of the upper air ejector pipe and the lower air ejector pipe extending out of the furnace shell are provided with a set of pneumatic cut-off valves for control, and the upper air ejector pipe and the lower air ejector pipe are connected with an air supply device so that the high-pressure air belt can be ejected from the ejection seams of the upper air ejector pipe and the lower air ejector pipe to cool the steel belt.
Further, atomizer includes upper spray pipe and lower spray pipe that corresponds the setting from top to bottom, and upper spray pipe sets up in the interval department of two upper jet pipes, and lower spray pipe sets up in the interval department of two lower jet pipes, all is provided with a plurality of nozzles on upper spray pipe and the lower spray pipe
Furthermore, the flushing device comprises a flushing pipe and a flushing nozzle connected to the flushing pipe, the flushing pipe is arranged in the furnace shell and located between the lower air injection pipe and the water circulation groove, and the flushing nozzle sprays water downwards so as to flush the water circulation groove.
Further, for the bearing roller adopts hollow roller, hollow roller one end is connected with rotary joint, is connected with inlet tube and outlet pipe on the rotary joint to supply to import cooling water and export hot water respectively, thereby cool off hollow roller, the hollow roller after the cooling further takes away the heat of steel band when bearing the steel band and pass through.
Further, the defogging device includes exhaust column, air exhauster, exhaust pipe and convulsions adjusting device, and exhaust column one end intercommunication stove outer covering, air exhauster connect between exhaust column and exhaust pipe, and convulsions adjusting device sets up in the suction opening position of exhaust column and stove outer covering junction to supply the size in regulation suction opening, and then adjust the stove outer covering internal pressure.
The utility model provides a continuous annealing cooling system of stainless steel, includes the air cooling section that is formed by multisection air cooler, the fog cooling section, water-cooling section, pinch roll device and the dry section that are formed by multisection fog cooler, the fog cooling section sets up between air cooling section and water-cooling section, and air cooling section, fog cooling section, water-cooling section, pinch roll device and dry section set gradually along steel band traffic direction, the air cooler is used for the upper and lower surface of being the steel band blowout highly-compressed air respectively, the fog cooling section is used for the transition cooling between air cooling section and the water-cooling section, and the water-cooling section is used for the upper and lower surface of being the steel band blowout water smoke respectively, and pinch roll device is used for the centre gripping steel band to carry, and the dry section is used for getting rid.
The cooling method of the stainless steel continuous annealing cooling system comprises the following steps that a steel strip enters the air cooling section from the input end of the air cooling section, high-pressure air is sprayed to the upper surface and the lower surface of the steel strip through an air cooler of the air cooling section to preliminarily cool the steel strip, the steel strip after preliminary cooling enters the fog cooling section, the high-pressure air sprayed by the fog cooler of the fog cooling section and the conical water mist curtain further cool the steel strip, the steel strip after further cooling enters the water cooling section, the conical water mist curtain sprayed by the water cooling section cools the steel strip finally, the steel strip after final cooling is input into the drying section through the pinch roll device, and the surface of the steel strip is dried through the drying section after moisture is removed.
The fog cooler is applied to a transitional cooling section formed between an air cooling section and a water cooling section, and is matched with a furnace shell, an air injection device, a spraying device, a flushing device, a carrier roller and a demisting device, so that the problems of large dust and unsatisfactory cooling effect are effectively solved, the operating environment of a production section is improved, the cooling control proportion of a stainless steel hot-rolled plate strip is improved, water cooling and air cooling water mist cooling are performed, the purposes of dust fall and cooling are achieved, circulating airflow dust purification is performed, and oxide skin waste residues are mixed with cooling water for diversion and are filtered and collected.
Preferred embodiments of the present invention and advantageous effects thereof will be described in further detail with reference to specific embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings, there is shown in the drawings,
FIG. 1: the invention relates to a schematic view structure of a fog cooler;
FIG. 2: the invention relates to a schematic structural diagram of a fog cooler in a top view;
FIG. 3: FIG. 1 is a schematic sectional view taken along line A-A;
FIG. 4: FIG. 1 is a schematic sectional view taken along line B-B;
FIG. 5: FIG. 1 is a schematic sectional view taken along line C-C;
FIG. 6: the invention discloses a structural schematic diagram of a stainless steel continuous annealing cooling system.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1, the present invention provides a mist cooler 102, which includes a furnace shell 1, an air injection device 2, a spraying device 3, a washing device 4, a carrier roller 5 and a mist removing device 6. A cooling cavity is formed in the furnace shell 1, a water circulation groove 12 is arranged at the bottom of the furnace shell 1, and a steel belt input port and a steel belt output port are respectively arranged at two ends of the furnace shell 1. The air injection device 2 is arranged in the furnace shell 1 and is used for respectively injecting a plurality of high-pressure air belts extending along the width direction of the steel belt for the upper surface and the lower surface of the steel belt. The spraying device 3 is arranged in the furnace shell 1 and is used for spraying a plurality of conical water mist curtains which are distributed at intervals along the width direction of the steel strip for the upper surface and the lower surface of the steel strip respectively, the conical water mist curtains are arranged in a row to form a water mist array, the water mist array is arranged at intervals along the length direction of the steel strip, and the water mist array is positioned at intervals of a plurality of high-pressure air strips respectively. The mist sprayed from the spraying device 3 is collected in the water circulation tank 12. The flushing device 4 is arranged in the furnace shell 1 between the air injection device 2 and the water circulation tank 12 for injecting water downwards to flush the water circulation tank 12. The supporting roller 5 is rotatably arranged at the output end of the furnace shell 1 to support and convey the steel belt. The demisting device 6 is arranged at a position close to the bottom of the furnace shell 1 at one side for discharging cooled waste gas and mist.
Referring to fig. 2, the furnace shell 1 is formed by welding 304 steel plates with a thickness of 6mm and is provided with a steel structural support consisting of section steel. The width of the furnace is 2300mm, and the length of the furnace is 6 m. The top of the furnace shell 1 is provided with two observation furnace doors 11 which can be opened and closed by a turnover cover; the water circulation tank 12 is connected with a drain pipe at a low point of the bottom of the inclined part to discharge waste water to a sump outside the workshop.
Referring to fig. 3, the gas injection device 2 includes an upper gas injection pipe 21 and a lower gas injection pipe 22 disposed in the furnace shell 1 and above the water circulation tank 12, wherein 9 gas injection pipes are disposed on the upper gas injection pipe 21 and the lower gas injection pipe 22, and each upper gas injection pipe 21 is disposed corresponding to each lower gas injection pipe 22. The bottom of the upper gas ejector 21 and the top of the lower gas ejector 22 are both provided with a jet slit, the width of the jet slit is about 7mm, the wind speed is 80m/min, the length of the jet slit is 1500mm, and the distance between the upper gas ejector 21 and the lower gas ejector 22 is about 210 mm. The sections of the upper gas injection pipe 21 and the lower gas injection pipe 22 extending out of the furnace shell 1 are provided with a set of pneumatic cut-off valves for control. The upper air injection pipe 21 and the lower air injection pipe 22 are respectively connected with an air supply device, so that the high-pressure air belt is sprayed out of the spraying gaps of the upper air injection pipe 21 and the lower air injection pipe 22 to cool the steel belt.
Referring to fig. 4, the spraying device 3 includes an upper spraying pipe 31 and a lower spraying pipe 32 which are vertically disposed, the upper spraying pipe 31 is disposed at a space between two upper air injection pipes 21, and the lower spraying pipe 32 is disposed at a space between two lower air injection pipes 22. Three upper spray pipes 31 and three lower spray pipes 32 are provided at intervals. The upper spray pipe 31 and the lower spray pipe 32 are each provided with a plurality of nozzles, each having a flow rate of about 30L/min (0.5 ba). The nozzles of the upper spray pipes 31 spray the conical water mist curtains downwards to the upper surface of the steel strip, and the nozzles of the lower spray pipes 32 spray the conical water mist curtains upwards to the lower surface of the steel strip, so that the steel strip is cooled, and iron scales and iron powder fly ash on the surface of the steel strip are washed into the water circulation tank 12.
Referring to fig. 3, the washing device 4 includes a washing pipe 41 and a washing nozzle 42 connected to the washing pipe 41, the washing pipe 41 is disposed in the furnace casing 1 and located between the lower air injection pipe 22 and the water circulation tank 12, and the washing nozzle 42 sprays water downwards to wash the water circulation tank 12, so as to prevent iron scale from depositing and blocking, and ensure smooth discharge of waste water and waste residue. Four flushing pipes 41 are arranged at intervals, and each flushing pipe 41 is provided with seven flushing nozzles 42, the water spraying speed of the washing nozzle 42 is about 40L/min (0.5ba), and the total is about 600m3/h。
Referring to fig. 5, in order to further cool the steel strip, the carrier roller 5 is a hollow roller, one end of the hollow roller is connected with a rotary joint 51, the rotary joint 51 is connected with a water inlet pipe and a water outlet pipe for respectively inputting cooling water and outputting hot water, so as to cool the hollow roller, and the cooled hollow roller further takes away heat of the steel strip when the bearing steel strip passes through.
Referring to fig. 4, the demister 6 includes an exhaust pipe 61, an exhaust fan 62, an exhaust pipe 63 and an exhaust adjusting device 64, wherein one end of the exhaust pipe 61 is connected to the furnace casing 1, and the exhaust fan 62 is connected between the exhaust pipe 61 and the exhaust pipe 63 for sucking the exhaust gas and mist in the furnace casing 1. The air draft adjusting device 64 is arranged at the position of an air draft opening at the joint of the air draft pipe 61 and the furnace shell 1, so as to adjust the size of the air draft opening and further adjust the pressure in the furnace shell 1.
Referring to fig. 6, the present invention further provides a continuous annealing cooling system for stainless steel using the mist cooler 102, wherein the continuous annealing cooling system for stainless steel comprises an air cooling section 101 formed by four air coolers, a mist cooling section formed by five air coolers 102, a water cooling section 103, a pinch roll device 104 and a drying section 105, which are sequentially arranged along the running direction of the steel strip. Each air cooler of the air cooling section 101 has a structure partially identical to that of the mist cooler 102. The air cooler is used for respectively spraying high-pressure air to the upper surface and the lower surface of the steel strip. The fog cooling section is used for transition cooling between the air cooling section 101 and the water cooling section 103. The water cooling section 103 is used for spraying water mist to the upper surface and the lower surface of the steel strip respectively. The pinch roll device 104 is used for clamping the steel strip for conveying. The drying section 105 is used to remove moisture from the surface of the steel strip.
The air cooler, the water cooling section 103, the pinch roll device 104 and the drying section 105 are prior art devices, and the detailed structure thereof is not described again.
The invention needs to provide a cooling method of the stainless steel continuous annealing cooling system, which comprises the following steps:
the steel strip enters the air cooling section 101 from the input end of the air cooling section 101, and high-pressure air is sprayed to the upper surface and the lower surface of the steel strip through the air cooler of the air cooling section 101, so that the steel strip is cooled preliminarily. The primarily cooled steel strip enters a fog cooling section, a high-pressure air strip and a conical water mist curtain are sprayed out of a fog cooler 102 of the fog cooling section to further cool the steel strip, the further cooled steel strip enters a water cooling section 103, the conical water mist curtain is sprayed out of the water cooling section 103 to finally cool the steel strip, the finally cooled steel strip is input into a drying section 105 through a pinch roll device 104, and moisture is removed from the surface of the steel strip through the drying section 105, so that the steel strip is dried.
The fog cooler 102 is applied to a transitional cooling section formed between an air cooling section 101 and a water cooling section 103, and the fog cooler 102 is matched with a furnace shell 1, an air injection device 2, an atomizing device 3, a flushing device 4, a carrier roller 5 and a demisting device 6, so that the problems of large dust and unsatisfactory cooling effect are effectively solved, the operating environment of a production section is improved, the cooling control ratio of a stainless steel hot-rolled plate strip is improved, the purposes of dust fall and cooling are achieved by water cooling and air cooling water mist cooling, dust purification of circulating air flow is realized, and oxide skin waste residues are mixed with cooling water for guiding, filtering, collecting and treating.
Any combination of the various embodiments of the present invention should be considered as disclosed in the present invention, unless the inventive concept is contrary to the present invention; within the scope of the technical idea of the invention, any combination of various simple modifications and different embodiments of the technical solution without departing from the inventive idea of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a fog cooler which characterized in that: the device comprises a furnace shell (1), an air injection device (2), an atomizing device (3), a washing device (4), a carrier roller (5) and a demisting device (6), wherein a cooling cavity is formed in the furnace shell (1), a water circulation groove (12) is formed at the bottom of the furnace shell (1), a steel strip input port and a steel strip output port are respectively arranged at two ends of the furnace shell (1), the air injection device (2) is arranged in the furnace shell (1) and used for respectively ejecting a plurality of high-pressure air strips extending along the width direction of the steel strip for the upper surface and the lower surface of the steel strip, the atomizing device (3) is arranged in the furnace shell (1) and used for respectively ejecting a plurality of conical water mist curtains distributed at intervals along the width direction of the steel strip for the upper surface and the lower surface of the steel strip, the plurality of conical water mist curtains are arranged in a line to form a water mist array, the water mist array is arranged at intervals along the length direction, the water mist sprayed by the spraying device (3) is collected in the water circulation groove (12), the washing device (4) is arranged in the furnace shell (1) and is positioned between the air spraying device (2) and the water circulation groove (12) so as to spray water downwards to wash the water circulation groove (12), the carrier roller (5) is rotatably arranged at the output end of the furnace shell (1) so as to support and convey the steel belt, and the demisting device (6) is arranged at a position close to the bottom of the furnace shell (1) on one side so as to discharge cooled waste gas and mist.
2. The mist cooler of claim 1, wherein: jet device (2) are including setting up in stove outer covering (1) and being located last jet-propelled pipe (21) and lower jet-propelled pipe (22) of hydrologic cycle groove (12) top, go up jet-propelled pipe (21) and lower jet-propelled pipe (22) and all set up a plurality of roots, and jet-propelled pipe (21) and each correspond the setting down jet-propelled pipe (22) on each, and the bottom of going up jet-propelled pipe (21) and the top of lower jet-propelled pipe (22) have all been seted up and have been spouted the seam.
3. The mist cooler of claim 2, wherein: the width of the jet gap is 7mm, the length of the jet gap is 1500mm, and the distance between the upper jet pipe (21) and the lower jet pipe (22) is 210 mm.
4. The mist cooler of claim 2, wherein: go up jet-propelled pipe (21) and lower jet-propelled pipe (22) stretch out to the outer one section of stove outer covering (1) and be equipped with one set of pneumatic trip valve and be used for control, go up jet-propelled pipe (21) and connect air feeder down jet-propelled pipe (22) to thereby supply jet-propelled pipe (21) and lower jet-propelled pipe (22) spout the blowout of high-pressure air area cooling steel band.
5. The mist cooler of claim 2, wherein: the spraying device (3) comprises an upper spraying pipe (31) and a lower spraying pipe (32) which are vertically and correspondingly arranged, the upper spraying pipe (31) is arranged at the interval of two upper air injection pipes (21), the lower spraying pipe (32) is arranged at the interval of two lower air injection pipes (22), and a plurality of nozzles are arranged on the upper spraying pipe (31) and the lower spraying pipe (32).
6. The mist cooler of claim 2, wherein: the washing device (4) comprises a washing pipe (41) and a washing spray head (42) connected to the washing pipe (41), the washing pipe (41) is arranged in the furnace shell (1) and is positioned between the lower air injection pipe (22) and the water circulation groove (12), and the washing spray head (42) sprays water downwards so as to wash the water circulation groove (12).
7. The mist cooler of claim 1, wherein: adopt hollow roller for bearing roller (5), hollow roller one end is connected with rotary joint (51), is connected with inlet tube and outlet pipe on rotary joint (51) to supply to import cooling water and output hot water respectively, thereby cool off hollow roller, hollow roller after the cooling further takes away the heat of steel band when bearing the steel band and pass through.
8. The mist cooler of claim 1, wherein: defogging device (6) are including exhaust column (61), air exhauster (62), exhaust pipe (63) and convulsions adjusting device (64), and exhaust column (61) one end intercommunication stove outer covering (1), and air exhauster (62) are connected between exhaust column (61) and exhaust pipe (63), and convulsions adjusting device (64) set up in the suction opening position of exhaust column (61) and stove outer covering (1) junction to supply the size in regulation suction opening, and then adjust stove outer covering (1) internal pressure.
9. A stainless steel continuous annealing cooling system comprises an air cooling section (101) formed by a plurality of sections of air coolers, a water cooling section (103), a pinch roll device (104) and a drying section (105), and is characterized in that: the mist cooling device of any one of claims 1 to 8, wherein a mist cooling section formed by a plurality of mist cooling devices is arranged between the air cooling section (101) and the water cooling section (103), the air cooling section (101), the mist cooling section, the water cooling section (103), the pinch roll device (104) and the drying section (105) are sequentially arranged along the running direction of the steel strip, the air cooling device is used for respectively spraying high-pressure air to the upper surface and the lower surface of the steel strip, the mist cooling section is used for transitional cooling between the air cooling section (101) and the water cooling section (103), the water cooling section (103) is used for respectively spraying mist to the upper surface and the lower surface of the steel strip, the pinch roll device (104) is used for clamping the steel strip for conveying, and the drying section (105) is used for removing moisture on the surface of the steel strip.
10. A cooling method of a stainless steel continuous annealing cooling system according to claim 9, characterized in that: the method comprises the following steps that the steel strip enters the air cooling section (101) from the input end of the air cooling section (101), high-pressure air is sprayed to the upper surface and the lower surface of the steel strip through an air cooler of the air cooling section (101) to preliminarily cool the steel strip, the steel strip after preliminary cooling enters the fog cooling section, the high-pressure air sprayed by a fog cooler (102) of the fog cooling section and a conical water mist curtain further cool the steel strip, the steel strip after further cooling enters the water cooling section (103), the conical water mist curtain sprayed by the water cooling section (103) finally cools the steel strip, the steel strip after final cooling is input into a drying section (105) through a pinch roll device (104), and the steel strip is dried after moisture is removed from the surface of the steel strip through the drying section (105).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011609273.8A CN112795771A (en) | 2020-12-30 | 2020-12-30 | Mist cooler, stainless steel continuous annealing cooling system and cooling method thereof |
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| CN202011609273.8A CN112795771A (en) | 2020-12-30 | 2020-12-30 | Mist cooler, stainless steel continuous annealing cooling system and cooling method thereof |
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| CN102747213A (en) * | 2011-04-22 | 2012-10-24 | 宝山钢铁股份有限公司 | Cooling method for continuous heat treatment of high-strength steel |
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