CN115141925A - Cold-rolled steel strip heat treatment waste heat recovery equipment and method thereof - Google Patents
Cold-rolled steel strip heat treatment waste heat recovery equipment and method thereof Download PDFInfo
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- CN115141925A CN115141925A CN202211064895.6A CN202211064895A CN115141925A CN 115141925 A CN115141925 A CN 115141925A CN 202211064895 A CN202211064895 A CN 202211064895A CN 115141925 A CN115141925 A CN 115141925A
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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
- C21D9/562—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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Abstract
The invention discloses a device and a method for recovering waste heat of cold-rolled steel strip heat treatment, and relates to the field of steel strip processing. In the process of heat treatment of the steel strip, the high-temperature steel strip enters between the two groups of cooling heat exchange plates during tempering, the high-temperature steel strip is cooled by flowing cooling oil, the high-temperature cooling oil enters the heat pipes under the push of the steam fan blades and flows into the preheating box along the heat pipes, and the steel strip which just enters the equipment is preheated by the heating heat exchange plates.
Description
Technical Field
The invention relates to the field of steel strip processing, in particular to a cold-rolled steel strip heat treatment waste heat recovery device and a method thereof.
Background
The strip steel is a narrow and long steel plate produced by various steel rolling enterprises in order to meet the requirements of different industrial departments on industrial production of various types of metal or mechanical products. The steel strip is also called steel strip, the width is within 1300mm, the length is slightly different according to the size of each roll, the steel strip needs to be subjected to heat treatment in the production process, the heat treatment is usually normalizing, quenching and tempering, wherein the quenching is a heat treatment process of heating the steel to the temperature above the critical temperature Ac3 (hypoeutectoid steel) or Ac1 (hypereutectoid steel), preserving the temperature for a period of time to ensure that the steel is completely or partially austenitized, and then rapidly cooling to the temperature below Ms (or isothermal temperature near Ms) at the cooling speed higher than the critical cooling speed to perform martensite (or bainite) transformation, and the cooling medium is usually water.
The temperature is still higher usually after quenching and tempering the steel band, have a large amount of waste heat, it is current to retrieve through cooling body and waste heat, position when making the waste heat reach the steel band and entering into equipment, carry out the preliminary treatment to the steel band, thereby reduce the energy consumption, but current preheating recovery plant need adopt the motor to control cooling body usually, not only efficiency is lower at the power conversion in-process, still can reduce the preheating to the steel band, lead to a large amount of heats still give off to in the air, influence recovery efficiency, secondly in steel band quenching process, it carries out quick cooling with the steel band of high temperature, this in-process also can cause a large amount of heat to produce, but current equipment can not be fine carry out recycle to the waste heat of this in-process.
Disclosure of Invention
Based on the above, the invention aims to provide equipment and a method for recovering waste heat of heat treatment of cold-rolled steel strips, so as to solve the technical problems that the waste heat recovery efficiency is low and the waste heat generated by quenching is inconvenient to recover.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a cold rolled steel strip thermal treatment waste heat recovery equipment, includes heating furnace, tempering furnace, quenching case, preheating cabinet and cooler bin, and this equipment both sides are provided with respectively and send out winding wheel and rolling wheel, send out winding wheel internally mounted and have the steel band, and the steel band passes each group's mechanism and rolling wheel switch-on in the equipment, the top of quenching case is installed and is retrieved the mechanism, retrieve the bottom of mechanism and set up the air inlet with the inside switch-on of quenching case, retrieve the inside of mechanism and be located the air inlet and install the steam flabellum directly over, the preheating cabinet is installed to the one end that the heating furnace is close to sending out winding wheel, the cooler bin is installed to the one end that the tempering furnace is close to the rolling wheel, two sets of heat transfer boards are all installed to the inside of preheating cabinet and cooler bin, and two sets of heat transfer boards are located the top and the below of steel band respectively and laminate with the steel band, the top of quenching case is provided with cold tube and heat pipe, and the heat transfer board switch-on in cold tube, one side of retrieving the mechanism is located the cold tube and has the drive box, and the axis position is connected with the transfer line is connected with the drive flabellum.
Through adopting above-mentioned technical scheme, can be convenient carry out thermal treatment to the steel band, and the steam that produces when handling when quenching utilizes, retrieve the heat of steel band when tempering through steam drive waste heat recovery mechanism, improve the availability factor.
The invention is further arranged in such a way that the two sides of each group of heat exchange plates are connected with connecting frames, connecting pipes are connected inside the connecting frames, each group of connecting pipes are respectively communicated with a cold pipe and a heat pipe, a heat exchange pipe is connected inside each group of heat exchange plates, the end part of the heat exchange pipe extends into each group of connecting pipes, and the end parts of different connecting pipes are respectively communicated with the cold pipe and the heat pipe. .
Through adopting above-mentioned technical scheme, can conveniently be connected each group heat exchange plate with cold pipe, heat pipe to make the cooling oil flow between each group heat exchange plate, conduct the waste heat, conveniently retrieve the waste heat.
The invention is further set that a pressing cylinder is arranged inside the quenching box, the output end of the pressing cylinder is connected with a roller, the bottom end inside the quenching box is provided with a water pool, and the pressing cylinder pushes a steel belt to be inserted into water inside the water pool through the roller.
By adopting the technical scheme, the steel belt can be conveniently quenched, so that the steel belt is immersed under water.
The invention is further arranged in such a way that the opening positions of the two ends of the quenching box are both provided with limiting rollers, the outer side of the quenching box is positioned on the outer side of each group of limiting rollers and is connected with a sealing mechanism, the sealing mechanism comprises a hydraulic cylinder and a sealing plate, the sealing plate is positioned on one side of the limiting rollers, and the end part of the sealing plate is attached to the outer wall of the steel strip.
By adopting the technical scheme, the quenching box can be sealed, and the steam pressure in the quenching box in the quenching process is increased.
The invention is further arranged in such a way that a steam cooling chamber is arranged on one side of the quenching box, a heating pipe is arranged in the steam cooling chamber and is arranged outside the steel strip in a surrounding manner, the top end of the heating pipe is connected with a return pipe, the return pipe extends to the outer side of the quenching box and is communicated with the side face of the top end of the recovery mechanism, the port of the return pipe is positioned obliquely above the steam fan blade, the bottom end of the heating pipe is connected with an inclined pipe, the end part of the inclined pipe extends to the bottom end of the water pool, and the heating pipe is positioned above the water pool.
By adopting the technical scheme, the steam can be conveniently recovered, the steam enters the heating pipe to be liquefied, and the quenched steel plate is preheated and insulated.
The steam cooling chamber is further provided with water absorption cotton connected to the outer side of the heating pipe, the heating pipe is attached to the outer wall of the steel belt through the water absorption cotton, and the two sides of the steam cooling chamber are respectively provided with an air exchange net which is communicated with an external high-pressure air source.
Through adopting above-mentioned technical scheme, can adhere to the water in the steel band outside and clear up, reduce the moisture that enters into the tempering furnace.
The invention is further arranged in that a support frame is connected inside the heating pipe, and a heat conducting rod is connected between the outer side of the support frame and the heating pipe.
Through adopting above-mentioned technical scheme, can increase the intensity of heating pipe to improve the heat-conduction between heating pipe and the steel band.
A method for recovering waste heat of heat treatment of cold-rolled steel strips comprises the following steps:
the method comprises the following steps: firstly, a steel strip coil is arranged on an uncoiling wheel and a coiling wheel, then a steel strip penetrates through heat treatment equipment, the equipment is connected with an external power supply, the equipment can normally run, the steel strip is pulled through the coiling wheel to move in the equipment, and the steel strip is processed through each group of equipment;
step two: the steel strip passes through a preheating box, and a preheating heat exchange plate preheats the steel strip;
step (ii) of thirdly, the method comprises the following steps: the steel strip enters a heating furnace, and the temperature of the steel strip is rapidly raised through the heating furnace;
step four: the steel strip penetrates through the heating furnace and enters the quenching box, the pressing roller is slightly pushed by the pressing cylinder to bend downwards and enter the water pool, the high-temperature steel strip is rapidly cooled by water to generate a large amount of steam, the high-temperature steam enters the recovery mechanism, and the cooling oil in the cold pipe and the hot pipe is driven to flow by the recovery mechanism;
step five: the steel strip enters a tempering furnace for tempering treatment;
step six: the tempered high-temperature steel strip enters a cooling box, a cooling heat exchange plate in the cooling box is attached to the outer side of the steel strip, and low-temperature cooling oil cools and absorbs heat of the tempered steel strip through a heat exchange pipe, so that the temperature of the steel strip is reduced;
step seven: and rolling the processed steel belt through a rolling wheel.
In summary, the invention mainly has the following beneficial effects:
1. according to the invention, through the arrangement of the recovery mechanism, the cold pipe, the heat exchange plates and the connecting frame, in the process of heat treatment of the steel belt, the high-temperature steel belt enters between the two groups of cooling heat exchange plates during tempering, the high-temperature steel belt is cooled through flowing cooling oil, the high-temperature cooling oil enters the heat pipe under the pushing of the steam fan blades and flows into the preheating box along the heat pipe, and the steel belt which just enters the equipment is preheated through the heating heat exchange plates, so that the utilization efficiency of waste heat can be effectively improved, and the problem of low waste heat recovery efficiency is effectively solved.
2. According to the invention, through the arrangement of the quenching box, the recovery mechanism, the return pipe and the heating pipe, high-temperature steam is continuously accumulated in the quenching box in the quenching process, the pressure in the quenching box is increased, the high-pressure high-temperature steam enters the recovery mechanism through the air inlet to push the steam fan blades to rotate, the steam fan blades drive the fan blades to rotate, the fan blades are driven to drive cooling oil to flow in the cooling pipe, and power is provided for the waste heat recovery mechanism, so that the energy in quenching is effectively utilized, secondly, the high-temperature high-pressure steam enters the return pipe to be liquefied into high-temperature water after pushing the steam fan blades to rotate, the high-temperature water enters the heating pipe to continuously flow around the quenched steel belt, and the high-temperature water can keep the temperature of the quenched steel belt, so that the temperature of the steel belt before entering the tempering furnace is increased, the energy consumption is reduced, the quenching waste heat is utilized again, the use efficiency is improved, and the problem that the waste heat generated by quenching is inconvenient to recover is effectively solved.
3. According to the invention, through the arranged quenching box and the heating pipe, a small amount of water is attached to the surface of the quenched steel belt, after the steel belt enters the steam cooling chamber, the water vapor of the steel belt is cleaned through the absorbent cotton on the outer side of the heating pipe, sufficient air flow is provided for the steam cooling chamber through the air exchange net, the water vapor on the surface of the steel belt is dried and removed, and the high-temperature water in the heating pipe can be cooled, so that the temperature of the recovered water is reduced, the recovered water can conveniently enter the water tank again to quench the steel belt, and the use efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic structural diagram of a waste heat recovery mechanism according to the present invention;
FIG. 4 is a schematic cross-sectional view of the waste heat recovery mechanism of the present invention;
FIG. 5 is a schematic cross-sectional view of a heat exchange plate according to the present invention;
FIG. 6 is a schematic view of the internal structure of the quenching box of the invention;
FIG. 7 is a schematic cross-sectional view of the recycling mechanism of the present invention;
FIG. 8 is a schematic view of a heating tube according to the present invention;
fig. 9 is a schematic cross-sectional view of a heating tube according to the present invention.
In the figure: 1. heating furnace; 2. tempering furnace; 3. a quenching box; 301. pressing down the air cylinder; 302. a roller; 303. a pool; 304. a limiting roller; 305. a steam cooling chamber; 306. a ventilation net; 4. a recovery mechanism; 401. a drive cartridge; 402. an air inlet; 403. steam fan blades; 404. a transmission rod; 405. driving the fan blades; 5. cooling the pipe; 6. a limiting box; 7. a preheating box; 8. a cooling tank; 9. a hair-rolling wheel; 10. a winding wheel; 11. a steel belt; 12. a heat pipe; 13. a thermal insulation plate; 14. a heat exchange plate; 1401. a heat exchange tube; 15. a connecting frame; 16. a connecting pipe; 17. a partition plate; 18. fixing the rod; 19. a return pipe; 20. heating a tube; 2001. absorbent cotton; 2002. a support frame; 2003. a heat conducting rod; 21. an inclined tube; 22. and (4) a sealing mechanism.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The following describes an embodiment of the present invention based on its overall structure.
The utility model provides a cold rolled steel strip thermal treatment waste heat recovery equipment, as shown in the figure, including heating furnace 1, tempering furnace 2, quenching case 3, preheating cabinet 7 and cooling cabinet 8, and this equipment both sides are provided with respectively and send out reel 9 and wind-up pulley 10, send out reel 9 internally mounted has steel band 11, and steel band 11 passes each group's mechanism in the equipment and wind-up pulley 10 switch-on, process steel band 11 through thermal treatment equipment, recovery mechanism 4 is installed on the top of quenching case 3, the bottom of retrieving mechanism 4 is seted up the air inlet 402 with the inside switch-on of quenching case 3, the internally mounted of quenching case 3 has down air cylinder 301, the output of down air cylinder 301 is connected with the running roller 302, and the inside bottom of quenching case 3 has seted up pond 303, down air cylinder 301 promotes steel band 11 through down air cylinder 301 and inserts the inside aquatic of pond 303, the inside of recovery mechanism 4 is located fan blade 402 and installs steam 403 directly over, when quenching steel band 11, high-temperature high pressure steam enters into and retrieves in the mechanism 4. A cold pipe 5 and a heat pipe 12 are arranged above the quenching box 3, a limiting box 6 is arranged on the outer sides of the cold pipe 5 and the heat pipe 12, and a partition plate 17 is connected to the inner wall of the limiting box 6 to separate the cold pipe 5 from the heat pipe 12, so that heat exchange between the cold pipe 5 and the heat pipe 12 is reduced;
a driving box 401 is arranged inside the cold pipe 5 on one side of the recovery mechanism 4, a transmission rod 404 is connected with the middle shaft position of the steam fan blade 403, the transmission rod 404 extends to the inside of the driving box 401 and is connected with a driving fan blade 405, so as to drive the driving fan blade 405 to rotate and drive the cooling oil in the cold pipe 5 and the heat pipe 12, a preheating box 7 is arranged at one end of the heating furnace 1 close to the coiling wheel 9, a cooling box 8 is arranged at one end of the tempering furnace 2 close to the coiling wheel 10, two groups of heat exchange plates 14 are arranged inside the preheating box 7 and the cooling box 8, the two groups of heat exchange plates 14 are respectively arranged above and below the steel belt 11 and are attached to the steel belt 11, connecting frames 15 are connected with both sides of each group of heat exchange plates 14, connecting pipes 16 are connected with the inside of the connecting frames 15, the connecting pipes 16 are respectively communicated with the cold pipe 5 and the heat pipe 12, and heat exchange pipes 1401 are connected with the inside of each group of heat exchange plates 14, the end parts of the heat exchange pipes 1401 extend to the inside of each group of connecting pipes 16, the end parts of different connecting pipes 16 are respectively communicated with the cold pipes 5 and the heat pipes 12, cooling oil flows along the cold pipes 5 and enters the cooling tank 8 positioned at the outer side of the tempering furnace 2, the cooling heat exchange plates 14 in the cooling tank 8 are attached to the outer side of the steel strip 11, the low-temperature cooling oil cools and absorbs heat for the steel strip 11 after tempering treatment through the heat exchange pipes 1401, so as to reduce the temperature of the steel strip 11, the high-temperature cooling oil can continuously flow in the waste heat recovery mechanism through the heat pipes 12 until reaching the preheating tank 7 positioned at the port of the heating furnace 1, the high-temperature cooling oil enters the heating heat exchange plates 14 in the preheating tank 7 and preheats the steel strip 11 which just enters the heat treatment equipment at high temperature, so as to improve the temperature of the steel strip 11 entering the heating furnace 1, and further reduce the heat required by heating the steel strip 11, the energy consumption is reduced;
a steam cooling chamber 305 is arranged on one side of the quenching box 3, a heating pipe 20 is arranged in the steam cooling chamber 305, the heating pipe 20 is arranged on the outer side of the steel strip 11 in a surrounding manner, absorbent cotton 2001 is connected to the outer side of the heating pipe 20, the heating pipe 20 is attached to the outer wall of the steel strip 11 through the absorbent cotton 2001, air exchange nets 306 are respectively arranged on two sides of the steam cooling chamber 305, the air exchange nets 306 are communicated with an external high-pressure air source, a return pipe 19 is connected to the top end of the heating pipe 20, the return pipe 19 extends to the outer side of the quenching box 3 and is communicated with the side face of the top end of the recovery mechanism 4, the port of the return pipe 19 is positioned obliquely above the steam fan blade 403, an inclined pipe 21 is connected to the bottom end of the heating pipe 20, the end of the inclined pipe 21 extends to the bottom end of the water pool 303, and the heating pipe 20 is positioned above the water pool 303, will enter the back flow pipe 19 and liquefy into high temperature water, high temperature water enters into the heating pipe 20 in the steam cooling chamber 305, heating pipe 20 encircles the steel band 11 that has just quenched, high temperature water will carry out heat preservation preheating to steel band 11, thereby improve the temperature when steel band 11 enters tempering furnace 2, thereby reduce the energy that steel band 11 heating required during tempering, reduce the energy consumption, and steel band 11 is attached to a small amount of water in the surface after quenching, if directly enter into tempering furnace 2, steam can seriously disturb the tempering process, when steel band 11 enters into steam cooling chamber 305, provide the air current to the steam cooling chamber 305 through trading air net 306, carry out the dewatering to steel band 11 surface, also can absorb the remaining water in steel band 11 surface through cotton 2001 that absorbs water, reduce the water on steel band surface and adhere to.
Referring to fig. 6, the opening positions at both ends of the quenching box 3 are both provided with the limiting rollers 304, the sealing mechanism 22 is installed on the outer side of each group of limiting rollers 304 on the outer side of the quenching box 3, the sealing mechanism 22 includes a hydraulic cylinder and a sealing plate, the sealing plate is located on one side of the limiting rollers 304, and the end portion of the sealing plate is attached to the outer wall of the steel strip 11, so that the inside of the quenching box 3 can be sealed, heat preservation and pressure maintaining can be performed, and therefore the steam output pressure of the quenching box 3 in the recovery mechanism 4 can be improved.
Referring to fig. 9, a supporting frame 2002 is connected inside the heating pipe 20, and a heat conducting rod 2003 is connected between the outside of the supporting frame 2002 and the heating pipe 20, so that the strength of the heating pipe 20 can be effectively improved, and the heat transfer of the heating pipe to the outer steel strip 11 can be improved.
Referring to fig. 1 to 9, a method for recovering waste heat from a cold rolled strip in a heat treatment process includes the following steps:
the method comprises the following steps: firstly, the steel strip coil is arranged on the coiling wheel and the coiling wheel, then the steel strip passes through the heat treatment equipment, the equipment is connected with an external power supply, the equipment can normally run, the steel belt is pulled through the winding wheel at the moment, the steel belt moves in the equipment, and the steel belt is processed through each group of equipment;
step two: the steel strip passes through a preheating box, and a preheating heat exchange plate preheats the steel strip;
step three: the steel strip enters a heating furnace, and the temperature of the steel strip is rapidly raised through the heating furnace;
step four: the steel strip penetrates through the heating furnace and enters the quenching box, the pressing roller is slightly pushed by the pressing cylinder to bend downwards and enter the water pool, the high-temperature steel strip is rapidly cooled by water to generate a large amount of steam, the high-temperature steam enters the recovery mechanism, and the cooling oil in the cold pipe and the hot pipe is driven to flow by the recovery mechanism;
step five: the steel strip enters a tempering furnace for tempering treatment;
step six: the tempered high-temperature steel band enters a cooling box, a cooling heat exchange plate in the cooling box is attached to the outer side of the steel band, and low-temperature cooling oil cools and absorbs heat of the tempered steel band through a heat exchange tube, so that the temperature of the steel band is reduced;
step seven: and rolling the processed steel belt through a rolling wheel.
The working principle of the invention is as follows: when the steel strip 11 is subjected to heat treatment, firstly, the steel strip coil is installed on an uncoiling wheel 9 and a coiling wheel 10, then, the steel strip 11 penetrates through heat treatment equipment, the equipment is connected with an external power supply, the equipment can normally operate, at the moment, the steel strip 11 is pulled through the coiling wheel 10, the steel strip 11 moves in the equipment, when the steel strip 11 enters into a heating furnace 1, the steel strip 11 is subjected to high-temperature heating, when the steel strip 11 is heated, the steel strip is moved out of the heating furnace 1 and enters into a quenching box 3, a pressing cylinder 301 in the quenching box 3 slightly pushes the steel strip 11 to bend downwards and enter into a water pool 303, the high-temperature steel strip 11 is rapidly cooled through water, the cooled steel strip 11 penetrates through the quenching box and enters into a tempering furnace 2, the tempering furnace 2 continuously heats the steel strip 11 at constant temperature, and after the steel strip 11 penetrates through the tempering furnace 2, the coiling wheel 10 performs coiling, and the processing on the steel strip 11 is completed;
in the heat treatment process of the steel strip 11, the steel strip 11 with continuous high temperature continuously enters the quenching box 3, the water at the top end of the water tank 303 is continuously gasified at high temperature by the steel strip 11 with high temperature, so that the pressure in the quenching box 3 is continuously increased, the high-pressure and high-temperature steam gradually enters the recovery mechanism 4 through the air inlet 402 and pushes the steam fan blade 403 to rotate, the steam fan blade 403 drives the driving fan blade 405 to rotate through the transmission rod 404, the driving fan blade 405 drives the cooling oil to flow in the cold pipe 5 in the driving box 401, so that the cooling oil is driven to flow in the waste heat recovery mechanism, the cooling oil flows along the cold pipe 5 and enters the cooling box 8 positioned at the outer side of the tempering furnace 2, the cooling heat exchange plate 14 in the cooling box 8 is attached to the outer side of the steel strip 11, and the low-temperature cooling oil cools and absorbs heat to the tempered steel strip 11 through the heat exchange pipe 1401, therefore, the temperature of the steel strip 11 is reduced, high-temperature cooling oil can continuously flow in the waste heat recovery mechanism through the heat pipe 12 until reaching the preheating box 7 at the port of the heating furnace 1, the high-temperature cooling oil enters the heating heat exchange plate 14 in the preheating box 7 and performs high-temperature preheating on the steel strip 11 which just enters the heat treatment equipment, so that the temperature of the steel strip 11 entering the heating furnace 1 is increased, the heat required by heating the steel strip 11 is reduced, the energy consumption is reduced, the cooled cooling oil continuously flows into the driving box 401 through the cold pipe 5 and is driven by the driving fan blades 405, the cooling oil is driven by steam generated during quenching, residual heat during quenching can be effectively utilized, and the use efficiency of energy is improved;
after the steam fan blades 403 are pushed to rotate, high-temperature and high-pressure steam can enter the return pipe 19 to be liquefied into high-temperature water, the high-temperature water enters the heating pipes 20 in the steam cooling chamber 305, the heating pipes 20 are wound on the outer side of the steel strip 11 which is just quenched, the high-temperature water can insulate and preheat the steel strip 11, so that the temperature of the steel strip 11 entering the tempering furnace 2 is increased, the energy required by heating the steel strip 11 during tempering is reduced, the energy consumption is reduced, a small amount of water is attached to the surface of the steel strip 11 after quenching, if the water directly enters the tempering furnace 2, the water vapor can seriously interfere with the tempering process, when the steel strip 11 enters the steam cooling chamber 305, air flow is provided for the steam cooling chamber 305 through the air exchange net 306, the surface of the steel strip 11 is dewatered, the water remained on the surface of the steel strip 11 can be absorbed through the water absorption cotton 2001, the water attached to the surface of the steel strip 11 is reduced, and the high-temperature water in the heating pipes 20 is cooled again returned to the water pool 303 through the pipeline, so that the water in the water pool 303 is recycled and the use efficiency is increased.
Although embodiments of the present invention have been shown and described, it is intended that the present invention should not be limited thereto, that the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples, and that modifications, substitutions, variations or the like, which are not inventive and may be made by those skilled in the art without departing from the principle and spirit of the present invention and without departing from the scope of the claims.
Claims (8)
1. The utility model provides a cold rolled steel strip thermal treatment waste heat recovery equipment, includes heating furnace (1), tempering furnace (2), quenching case (3), preheating cabinet (7) and cooling cabinet (8), and this equipment both sides are provided with unwinding wheel (9) and rolling wheel (10) respectively, unwinding wheel (9) internally mounted has steel band (11), and steel band (11) pass each group mechanism and rolling wheel (10) switch-on in the equipment, its characterized in that: the utility model discloses a quenching device, including quenching case (3), recovery mechanism (4) is installed on the top of quenching case (3), the air inlet (402) with the inside switch-on of quenching case (3) is seted up to the bottom of recovery mechanism (4), steam flabellum (403) are installed directly over the inside air inlet (402) that is located of recovery mechanism (4), preheating cabinet (7) are installed to heating furnace (1) one end near curling wheel (9), tempering furnace (2) are close to the one end of rolling wheel (10) and install cooler bin (8), two sets of heat transfer board (14) are all installed to preheating cabinet (7) and the inside of cooler bin (8), and two sets of heat transfer board (14) are located the top and the below of steel band (11) respectively and laminate with steel band (11), the top of quenching case (3) is provided with cold pipe (5) and heat pipe (12), cold pipe (5), heat transfer board (14) in preheating cabinet (7), cooler bin (8) switch-on, one side that recovery mechanism (4) is located cold pipe (5) has drive box (403), and steam flabellum position (401) extend to be connected with axis drive pole (401).
2. The apparatus for recovering the waste heat from the heat treatment of the cold rolled steel strip as set forth in claim 1, wherein: every group the both sides of heat transfer board (14) all are connected with link (15), the internal connection of link (15) has connecting pipe (16), and each group's connecting pipe (16) is put through with cold pipe (5), heat pipe (12) respectively, every group the internal connection of heat transfer board (14) has heat exchange tube (1401), the tip of heat exchange tube (1401) extends to inside each group's connecting pipe (16), and different connecting pipe (16) tip respectively with cold pipe (5), heat pipe (12) switch-on.
3. The apparatus for recovering the waste heat from the heat treatment of the cold rolled steel strip as set forth in claim 1, wherein: the internally mounted of quenching case (3) has down air cylinder (301), the output of down air cylinder (301) is connected with running roller (302), and the inside bottom of quenching case (3) has seted up pond (303), down air cylinder (301) promote steel band (11) through running roller (302) and insert the inside aquatic of pond (303).
4. The apparatus for recovering the waste heat from the heat treatment of the cold-rolled steel strip according to claim 1, wherein: the steel strip quenching device is characterized in that limiting rollers (304) are arranged at the opening positions at the two ends of the quenching box (3), the outer side of the quenching box (3) located at the outer side of each group of limiting rollers (304) is connected with a sealing mechanism (22), the sealing mechanism (22) comprises a hydraulic cylinder and a sealing plate, and the sealing plate is located on one side of each limiting roller (304) and the end of each sealing plate is attached to the outer wall of a steel strip (11).
5. The apparatus for recovering the waste heat from the heat treatment of the cold-rolled steel strip according to claim 1, wherein: steam cooling room (305) have been seted up to one side of quenching case (3), the inside of steam cooling room (305) is provided with heating pipe (20), and heating pipe (20) encircle to set up in steel band (11) outside, the top of heating pipe (20) is connected with back flow (19), back flow (19) extend to the outside of quenching case (3) and the top side switch-on of retrieving mechanism (4), and the port of back flow (19) is located the oblique top of steam flabellum (403), the bottom of heating pipe (20) is connected with pipe chute (21), and the tip of pipe chute (21) extends to the bottom of pond (303), and the position in pond (303) top of heating pipe (20).
6. The apparatus for recovering the waste heat from the heat treatment of the cold rolled steel strip as set forth in claim 5, wherein: the outer side of the heating pipe (20) is connected with water absorption cotton (2001), the heating pipe (20) is attached to the outer wall of the steel belt (11) through the water absorption cotton (2001), air exchange nets (306) are respectively arranged on two sides of the steam cooling chamber (305), and the air exchange nets (306) are communicated with an external high-pressure air source.
7. The apparatus for recovering the waste heat from the heat treatment of the cold-rolled steel strip according to claim 5, wherein: a supporting frame (2002) is connected to the interior of the heating pipe (20), and a heat conducting rod (2003) is connected between the outer side of the supporting frame (2002) and the heating pipe (20).
8. A method for recovering waste heat of cold-rolled steel strip heat treatment is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: firstly, mounting a steel strip coil on an unwinding wheel and a winding wheel, then enabling a steel strip to pass through heat treatment equipment, connecting the equipment with an external power supply to enable the equipment to normally operate, pulling the steel strip through the winding wheel to enable the steel strip to move in the equipment, and processing the steel strip through each group of equipment;
step two: the steel strip passes through a preheating box, and a preheating heat exchange plate preheats the steel strip;
step three: the steel strip enters a heating furnace, and the temperature of the steel strip is rapidly raised through the heating furnace;
step four: the steel strip penetrates through the heating furnace and enters the quenching box, the pressing roller is slightly pushed by the pressing cylinder to bend downwards and enter the water pool, the high-temperature steel strip is rapidly cooled by water to generate a large amount of steam, the high-temperature steam enters the recovery mechanism, and the cooling oil in the cold pipe and the hot pipe is driven to flow by the recovery mechanism;
step five: the steel strip enters a tempering furnace for tempering treatment;
step six: the tempered high-temperature steel strip enters a cooling box, a cooling heat exchange plate in the cooling box is attached to the outer side of the steel strip, and low-temperature cooling oil cools and absorbs heat of the tempered steel strip through a heat exchange pipe, so that the temperature of the steel strip is reduced;
step seven: and rolling the processed steel belt through a rolling wheel.
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| CN202211064895.6A CN115141925A (en) | 2022-09-01 | 2022-09-01 | Cold-rolled steel strip heat treatment waste heat recovery equipment and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118086663A (en) * | 2024-04-23 | 2024-05-28 | 山西广信机械制造有限公司 | W-shaped steel belt processing heat treatment equipment |
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Application publication date: 20221004 |