CN109988913B - Vertical cooler with moving plate discharge device and cooling method - Google Patents
Vertical cooler with moving plate discharge device and cooling method Download PDFInfo
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- CN109988913B CN109988913B CN201810001197.9A CN201810001197A CN109988913B CN 109988913 B CN109988913 B CN 109988913B CN 201810001197 A CN201810001197 A CN 201810001197A CN 109988913 B CN109988913 B CN 109988913B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/26—Cooling of roasted, sintered, or agglomerated ores
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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
- F27D17/10—Arrangements for using waste heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
A vertical cooler with a movable plate type discharging device, the vertical cooler comprises a distributing device, a tower body, an edge air supply device and a movable plate type discharging device; the tower body comprises a tower top column walls and column bottoms; the tower top is arranged at the top of the tower wall; the tower bottom is arranged at the bottom of the tower wall; the distributing device is arranged on the top of the tower the square part is communicated with the inside of the tower body; the side air supply device is arranged at the middle lower part of the tower wall; a discharge hole is arranged at the bottom of the tower; the movable plate type discharging device is arranged below the discharging port; the top of the tower or the upper part of the tower wall is provided with a hot air outlet. The vertical cooler has the characteristics of low cooling speed of the sinter, small ton consumption cooling air quantity, relatively small waste gas quantity, high waste gas temperature, high heat efficiency of the boiler, capability of completely utilizing the cooled waste gas by the boiler and general sensible heat recovery rate of the sinter of about 70 percent.
Description
Technical Field
The invention relates to a sinter cooler and a sinter cooling method, in particular to a vertical cooler with a movable plate type discharging device and a cooling method, belonging to the field of iron making and the field of environmental protection.
Background
In modern sintering processes, "cooling" is one of the more critical processes. After the sintering of the sintering machine, high Wen Chengpin ore is formed, and the problem of how to perform protective cooling on the high Wen Chengpin ore on the premise of not affecting the quality and the yield of the high Wen Chengpin ore is solved, so that the high Wen Chengpin ore can be conveyed into a finished ore bin through a belt conveyor, and meanwhile, the heat-generating energy carried by the high Wen Chengpin ore is perfectly recycled, so that the high Wen Chengpin ore is a constant research problem for the technical personnel in the industry.
At present, the sintering ore cooling mainly adopts a traditional belt type cooler or a ring type cooler based on the principle of rapid cooling by strong air and one-time loading and unloading cooling. The cooler has the problems of high air leakage rate, high power consumption of a fan, low sensible heat recovery rate, low thermal efficiency of a boiler and the like no matter which cooling mode is adopted. In other words, in the current large environment with more and more strict requirements on energy conservation, consumption reduction and green manufacturing in the market, the original equipment structure has hardly realized efficient recovery and utilization of the sensible heat of the sinter. Therefore, the limitation of traditional ring cooling or belt cooling is broken through, and the development of a process and technical equipment for efficiently recovering the sensible heat of the sinter is a necessary path for energy conservation and environmental protection in the sintering industry.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a countercurrent thick material layer cooling process based on low-wind slow cooling sinter by a great deal of research work on the sensible heat recovery of the sinter at home and abroad. The process has the characteristics of low cooling speed of the sinter, small ton consumption cooling air quantity, relatively small waste gas quantity, high waste gas temperature, high thermal efficiency of the boiler, capability of completely utilizing the cooling waste gas by the boiler, and general sensible heat recovery rate of the sinter reaching about 70 percent.
According to the cooling process of the sintering ore countercurrent thick material layer, the invention provides a vertical cooler with a movable plate type discharging device, which has the characteristics of uniform material distribution, uniform material discharge and uniform air distribution, and can also perform regional material discharge adjustment according to the cooling effect, so that the cooler has good cooling effect and high hot air temperature, and meets the requirements of the sintering ore countercurrent thick material layer cooling process. Compared with the discharging devices such as the electric vibration feeder, the plate feeder and the like, the movable plate type discharging device of the device has the characteristics of uniform discharging, simple and reliable structure, convenient maintenance and overhaul, low manufacturing cost, flexible and changeable arrangement form and the like.
Compared with the original annular cooler, the vertical cooler has the advantages of simple structure, reliable sealing, no air leakage, small equipment maintenance amount and high waste heat recovery efficiency.
According to a first embodiment of the present invention, there is provided a vertical cooler having a moving plate discharge device:
a vertical cooler with a movable plate type discharging device comprises a distributing device, a tower body, an edge air supply device and the movable plate type discharging device. The tower body comprises a tower top, a tower wall and a tower bottom. The tower top is arranged on the tower the top of the wall. The bottom of the tower is arranged at the bottom of the tower wall. The distributing device is arranged above the tower top and is communicated with the tower body. The side air supply device is arranged at the middle lower part of the tower wall. The bottom of the tower is provided with a discharge hole. The movable plate type discharging device is arranged below the discharging hole. The top of the tower or the upper part of the tower wall is provided with a hot air outlet.
In the invention, the top of the distributing device is provided with a feed inlet. The tower bottom is of a flat plate structure or a cone bottom structure, and preferably of a flat plate structure.
In the present invention, the vertical cooler further comprises a central air supply device. The central air supply device comprises a hood, a plurality of central air supply branch pipes, an annular or C-shaped central air supply duct and a central air supply duct connected with the central air supply duct. Wherein the hood is arranged in the tower body and is positioned on the central axis of the tower body. The central air supply duct is arranged at the outer side of the tower body. One end of each central air supply branch pipe and the central air supply duct the other end is communicated with the bottom or the lower part of the hood.
In the invention, the side air supply device comprises a side air supply duct and a side air supply duct connected with the side air supply duct. Wherein the side air supply duct surrounds the tower wall and is communicated with the inner part of the tower body.
Preferably, the vertical cooler further comprises a discharge chute, and the discharge chute is arranged below the movable plate type discharge device. Preferably, the top of the discharge chute is connected with the bottom of the tower bottom, and the movable plate type discharge device is positioned in a space formed by the discharge chute and the tower bottom. The bottom of the discharging chute is provided with a discharging hole.
In the invention, the movable plate type discharging device comprises a driving device, a movable plate, a bracket and a push-pull rod. The support is arranged below the discharge opening and is positioned in the discharge chute. The movable plate is arranged on the bracket. The driving device is arranged at the outer side of the discharging chute. One end of the push-pull rod is connected with the driving device, and the other end of the push-pull rod penetrates through the discharging chute to be connected with the moving plate. Preferably, the moving plate type discharging device further comprises a baffle plate. The baffle sets up in the top of movable plate and with support fixed connection.
Preferably, the driving device of the movable plate type discharging device is one of a hydraulic cylinder, an electric push rod, an electro-hydraulic push rod, an electric cylinder, a linear motor or a crank sliding block mechanism.
Preferably, the vertical cooling machine is provided with a plurality of temperature measuring elements on the tower wall, preferably along the circumferential direction. Preferably, the temperature measuring element is located at the upper part of the side air supply device and extends into the interior of the tower body. Preferably, the temperature measuring element is a thermocouple temperature sensor.
Preferably, the bottom of the vertical cooler is provided with a plurality of discharge ports, preferably 4 to 30 discharge ports, more preferably 4 to 24 discharge ports, and even more preferably 8 to 12 discharge ports. Preferably, the plurality of discharge ports are uniformly arranged in the circumferential direction of the bottom of the column. A movable plate type discharging device is arranged below each discharging hole.
In the invention, the hood comprises a support frame, a hood top cover, a plurality of conical cover plates and a hood air pipe. Wherein a plurality of toper apron sets gradually on the support frame. The hood top cover is arranged above the topmost conical cover plate. The tuber pipe sets up in the below of support frame and is connected with the support frame. As a preferred alternative to this, the hood top cover is of a conical structure. The cone angle of the hood top cover is larger than that of the cone cover plate.
Preferably, an air flow channel is formed between the upper and lower adjacent conical cover plates.
Preferably, the number of central air supply branches is 1-12, preferably 2-10, more preferably 4-8.
Preferably, the hood of the central air supply device is arranged at the middle lower part in the tower body. The central air supply duct is arranged at the outer side of the tower body. One end of each central air supply branch pipe is communicated with the central air supply duct, and the other end of each central air supply branch pipe penetrates through the tower wall and is communicated with the bottom or the lower part of the hood.
Preferably, the hood of the central air supply device is positioned at the bottom center of the tower body and extends upwards into the space in the tower body. The central air supply channel is positioned at the outer side of the discharge chute. One end of each central air supply branch pipe is communicated with the central air supply duct, and the other end of each central air supply branch pipe penetrates through the discharging chute to be communicated with the bottom or the lower part of the hood.
In the present invention, the vertical cooler further comprises a control system. The control system is connected with the movable plate type discharging device and the temperature measuring element, and the control system respectively and independently controls the driving device of the movable plate type discharging device below each discharging hole.
According to a second embodiment of the present invention, there is provided a method of cooling a sintered ore:
a method of cooling sinter or a method of using the above-described vertical cooler with a moving plate type discharge device, the method comprising the steps of:
1) The hot sinter enters the tower body through the distributing device, and the sinter continuously flows from top to bottom under the action of gravity and enters the vertical cooler for cooling;
2) Cooling air enters the tower body from the side air supply device and the central air supply device of the vertical cooler, passes through the sinter material layers stacked in the tower body from bottom to top, exchanges heat with the sinter, gradually increases the temperature of the cooling air after heat exchange, is discharged through the sinter material surface in the vertical cooler tower to form high-temperature hot air, and is discharged through the hot air outlet; preferably, the high temperature hot wind is delivered to a waste heat utilization system;
3) After the sinter is cooled by the vertical cooler, the sinter is discharged from one or more discharge ports to a movable plate type discharge device, the sinter on the movable plate type discharge device falls into a discharge chute, and is discharged from a discharge port of the discharge chute.
In the above method, step 3) specifically includes: after the sinter is cooled by the vertical cooler, the control system monitors the temperature of the sinter above each discharge hole according to each temperature measuring element on the tower wall;
if the discharging requirement is met, the control system controls a driving device of the movable plate type discharging device below the corresponding discharging hole, and the driving device drives the corresponding movable plate to move, so that the sintered ore at the position of the discharging hole is discharged; the sintered ore falls into a discharge chute through a movable plate type discharge device and is discharged from a discharge hole of the discharge chute; preferably, during discharging, the control system detects the temperature of the sintering ore at the position above the discharging port through the temperature measuring element at the same time, and if the temperature is higher than the discharging requirement, the control system controls the driving device to stop moving the moving plate;
if the discharge requirement is not met, no discharge is performed at the discharge port position.
In the invention, the tower body of the vertical cooler is divided into a hot air enrichment area and a cooling area from top to bottom, and the hot air enrichment area and the cooling area are places for cooling hot sinter. The upper hot air enrichment area is mainly a place for enriching hot air generated after heat exchange with the hot sinter, and the lower cooling area is a place for carrying out countercurrent heat exchange between the hot sinter and cooling air. The vertical cooler adopts an exhaust type, the inside of the vertical cooler is always kept at negative pressure, and the circulating fan generates negative pressure in the hot air enrichment area so as to pump away hot air in the circulating fan.
In the present invention, the vertical cooler is mainly composed of a distributing device, a tower body, an edge air supply device, a movable plate type discharging device, a central air supply device and a hot air outlet. The distributing device is convenient for the uniform feeding of the vertical cooler, and after the hot sinter enters the distributing device, the hot sinter enters a tower body consisting of a tower top, a tower wall and a tower bottom under the action of gravity and is naturally piled up in the tower body; cooling air uniformly enters the sintered ores stacked on the tower body through an edge air supply pipe and an edge air supply duct of the edge air supply device to cool the sintered ores; the cooling air can also enter the blast cap through a central air supply pipe, a central air supply channel and a central air supply branch pipe of the central air supply device, and then uniformly enter the sintered ores piled up on the tower body through the blast cap to cool the sintered ores; the cooled sinter flows into the discharge ports at the bottom of the tower under the action of gravity, and the discharge ports are uniformly distributed in a plurality along the circumferential direction of the bottom of the tower, so that the cooled sinter can uniformly flow downwards; the lower part of each discharge hole is connected with a movable plate type discharge device, and the discharge speed of each discharge hole can be controlled through the movable plate type discharge device. After the cooling air entering the tower body exchanges heat with the hot sinter, the hot sinter is cooled to below 150 ℃ and is heated to a higher temperature to become hot air, the hot air passes through the sinter bed and then enters a material-free area at the upper end of the tower body through a material surface at the top end of the sinter bed, and then is discharged from a hot air outlet through an exhaust fan to enter a subsequent waste heat power generation system.
In the invention, the movable plate type discharging device consists of a driving device, a movable plate, a bracket, a push-pull rod and a baffle plate. The movable plate is positioned below the discharge hole, can hold the material (namely the sintered ore) discharged from the discharge hole, and can not spill the material when the material is not discharged, and meanwhile, the movable plate can move from inside to outside (or from outside to inside) under the action of the driving device, so that the material discharging function is realized. The bracket mainly plays a role of supporting the moving plate. The baffle sets up in the top of movable plate, and other several sides except that the ejection of compact side all are equipped with the baffle, and the baffle both can help the movable plate to realize the row material, can prevent the unrestrained of material again. When discharging, the driving device drives the moving plate to move to the discharging side through the push-pull rod, and the moving plate brings the materials carried by the moving plate out of a certain distance under the action of the gravity and friction force of the materials; then under drive arrangement's effect, the movable plate removes a section distance to opposite direction, and at this moment owing to the effect of baffle, the material that the movable plate bore can not move along with the movable plate, and when the distance that the movable plate removed surpassed the pile up position of loaded material, the material will be discharged from the movable plate ejection of compact side to accomplish a discharge process. The discharge process is continuously circulated, so that uniform and quantitative discharge of materials can be realized. Moreover, the discharging side of the movable plate can be flexibly configured according to the uniformity of the material flow, for example, the discharging side can be at one end or two ends for discharging, that is, the discharging side of the movable plate can be inward or outward or both inward and outward for discharging. Inward here refers to the direction from the tower wall to the center of the tower, and outward refers to the direction from the center of the tower to the tower wall. In the present invention, the driving device of the movable plate type discharging device is not limited, and for example, one of the structures such as a hydraulic cylinder, an electric push rod, an electric hydraulic push rod, an electric cylinder, a linear motor, a crank block mechanism, and the like may be selected.
In the invention, the vertical cooler further comprises a discharging chute arranged below the movable plate type discharging device. The discharging chute mainly concentrates the sinter discharged by the movable plate type discharging device and then discharges the sinter through the discharging hole.
Preferably, the vertical cooler further comprises a plurality of temperature measuring elements positioned on the tower wall at the upper part of the side air supply device and extending into the interior of the tower body. The temperature measuring elements are evenly distributed along the circumferential direction of the tower wall. Preferably, the temperature measuring element is a thermocouple temperature sensor. The bottom of the vertical cooler is uniformly provided with a plurality of discharge ports along the circumferential direction. Each temperature measuring element on the tower wall is used for monitoring the temperature of the sintered ore at a position above each discharge hole.
Preferably, the apparatus also has a self-feedback discharge adjustment function. And detecting the temperature of the sintering ore in the corresponding area through the temperature measuring element, when the detected temperature of the sintering ore in a certain circumferential position reaches a cooling effect, normally starting a movable plate type discharging device below a discharging hole corresponding to the area to perform normal discharging, otherwise, cooling the sintering ore in the area for a period of time, and performing normal discharging after the temperature of the sintering ore reaches the cooling effect.
Preferably, the central air supply device consists of a hood, a central air supply branch pipe, a central air supply duct and a central air supply duct. The central air supply branch pipes are uniformly distributed in a plurality along the circumferential direction, one end of each central air supply branch pipe is communicated with the hood, and the other end is communicated with the central air supply duct. The central air supply duct is responsible for uniformly supplying air to each central air supply branch pipe. The central air supply pipe is responsible for supplying air to the central air supply air duct.
The hot sinter crushed by the single-roller crusher is transported to the top of the vertical cooler by the hot sinter conveying device, enters into the distributing device of the vertical cooler, continuously flows from top to bottom under the action of gravity, is naturally piled up in the tower body, performs countercurrent heat exchange with cooling air from bottom to top in the tower body, cools the sinter to below 150 ℃, passes through the discharge port at the bottom of the vertical cooler, is discharged into the discharge chute by the movable plate type discharge device, is discharged onto the cold sinter conveyor from the discharge port of the discharge chute, and transports the cooled sinter to the next process by the cold sinter conveyor.
Under the action of the circulating fan, cooling air is introduced into the tower body from the side air supply device and the central air supply device of the vertical cooler at a certain pressure, passes through the sinter bed from bottom to top, and performs countercurrent heat exchange with the sinter. The temperature of the cooling air after heat exchange is gradually increased, and the cooling air is discharged from the sinter level in the vertical cooler tower to form high-temperature hot air. The high-temperature hot air is discharged through a hot air outlet at the upper part of the vertical cooler. The discharged high-temperature hot air enters a subsequent waste heat power generation system.
In general, the height of the column consisting of the top, wall and bottom of the column is generally 4 to 30 m, preferably 5 to 25 m, more preferably 6 to 20 m, still more preferably 8 to 15 m. The outer diameter of the column is generally from 8 to 30 m, preferably from 9 to 27 m, preferably 10-25 meters, preferably 11-22 meters, more preferably 12-20 meters.
In this application, the diameter of the hood is generally 1.5-4 meters, preferably 1.8-3.5 meters, more preferably 2-3 meters, more preferably 2.2-2.8 meters, for example 2.5 meters.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the process has the characteristics of low cooling speed of the sinter, small ton consumption cooling air quantity, relatively small waste gas quantity, high waste gas temperature, high thermal efficiency of the boiler, capability of completely utilizing the cooling waste gas by the boiler, and general sensible heat recovery rate of the sinter reaching about 70%;
2. the equipment has the advantages of uniform material distribution, uniform material discharge and uniform air distribution, and also has the function of regional material discharge adjustment according to the cooling effect, so that the cooling machine has good cooling effect and high hot air temperature, and meets the requirements of a sintering ore countercurrent thick material layer cooling process;
3. compared with the annular cooler in the prior art, the vertical cooler has the advantages of simple structure, reliable sealing, no air leakage, small equipment maintenance amount and high waste heat recovery efficiency;
4. compared with the discharging devices such as the electric vibration feeder, the plate feeder and the like, the movable plate type discharging device has the characteristics of uniform discharging, simple and reliable structure, convenient maintenance and overhaul, low manufacturing cost, flexible and changeable arrangement form and the like.
Drawings
FIG. 1 is a schematic view of a vertical cooler with a moving plate type discharge device according to the present invention;
FIG. 2 is a schematic view of another vertical cooler with a moving plate type discharge device according to the present invention;
FIG. 3 is a schematic diagram of a side air supply device of the vertical cooler of the present invention;
FIG. 4 is a schematic view of the central air supply device of the vertical cooler of the present invention;
FIG. 5 is a front view of a mobile plate discharge device of the vertical cooler of the present invention;
FIG. 6 is a top view of a mobile plate discharge device of the vertical cooler of the present invention;
FIG. 7 is a schematic diagram of the structure of the two ends of the mobile plate type discharging device of the vertical cooler;
FIG. 8 is a cross-sectional view of the B-B position of FIG. 1;
FIG. 9 is a central air supply of the present invention a structural schematic diagram of a hood of the device;
FIG. 10 is a schematic diagram of a control system for a vertical cooler having a moving plate discharge device according to the present invention;
FIG. 11 is a schematic diagram of a vertical cooler with a moving plate discharge device according to the present invention.
Reference numerals: a0: a vertical cooler; 1: a material distribution device; 2: a tower body; 201: a tower top; 202: a tower wall; 203: a bottom of the tower; 204: a discharge port; 3: a side air supply device; 301: an edge air supply duct; 302: an edge air supply pipe; 4: a moving plate type discharging device; 401: a driving device; 402: a moving plate; 403: a bracket; 404: a push-pull rod; 405: a baffle; 5: a hot air outlet; 6: a central air supply device; m: a hood; m01: a support frame; m02: a top cover; m03: a conical cover plate; m04: an air duct; 601: a central air supply branch pipe; 602: a central air supply duct; 603: a central air supply duct; 7: a discharge chute; 701: a discharge port; 8: a temperature measuring element; k: and a control system.
Detailed Description
According to a first embodiment of the present invention, there is provided a vertical cooler having a moving plate discharge device:
a vertical cooler A0 with a movable plate type discharging device comprises a distributing device 1, a tower body 2, an edge air supply device 3 and a movable plate type discharging device 4. Column 2 includes a top 201, a wall 202 and a bottom 203. The tower top 201 is disposed on top of the tower wall 202. The bottom 203 of the column is arranged at the bottom of the column wall 202. The distributing device 1 is arranged above the tower top 201 and is communicated with the interior of the tower body 2. The side air supply device 3 is provided in the middle lower portion of the tower wall 202. The bottom 203 of the tower is provided with a discharge port 204. The moving plate type discharging device 4 is disposed below the discharging port 204. The top of the tower 201 or the upper part of the tower wall 202 is provided with a hot air outlet 5.
In the present invention, the vertical cooler A0 further includes a center air supply device 6. The central air supply device 6 includes a hood M, a plurality of central air supply branch pipes 601, a central air supply duct 602 of annular or "C" shape, and a central air supply duct 603 connected to the central air supply duct 602. Wherein the hood M is arranged inside the tower body 2 and is positioned on the central axis of the tower body 2. The central air supply duct 602 is disposed outside the tower 2. One end of each of the center air supply branch pipes 601 communicates with the center air supply duct 602 and the other end communicates with the bottom or lower portion of the hood M.
In the present invention, the side air supply device 3 includes a side air supply duct 301 and a side air supply duct 302 connected to the side air supply duct 301. Wherein the side air supply duct 301 surrounds the tower wall 202 and communicates with the interior of the tower body 2.
Preferably, the vertical cooler A0 further comprises a discharge chute 7, the discharge chute 7 being arranged below the mobile plate-type discharge device 4. Preferably, the top of the discharge chute 7 is connected to the bottom of the bottom 203 of the column, and the mobile plate-type discharge device 4 is located in the space formed by the discharge chute 7 and the bottom 203 of the column. The bottom of the discharging chute 7 is provided with a discharging hole 701.
In the invention, the movable plate type discharging device 4 comprises a driving device 401, a movable plate 402, a bracket 403 and a push-pull rod 404. The bracket 403 is arranged below the discharge opening 204 and in the discharge chute 6. The moving plate 402 is provided on the bracket 403. The drive means 401 are arranged outside the discharge chute 6. One end of a push-pull rod 404 is connected with the driving device 401, and the other end of the push-pull rod 404 passes through the discharging chute 6 to be connected with the moving plate 402. Preferably, the moving plate discharge device further comprises a baffle 405. The baffle 405 is disposed above the moving plate 402 and is fixedly coupled to the bracket 403.
Preferably, the driving device 401 of the moving plate type discharging device 4 is one of a hydraulic cylinder, an electric push rod, an electro-hydraulic push rod, an electric cylinder, a linear motor or a crank block mechanism.
Preferably, the vertical cooler A0 is provided with a plurality of temperature measuring elements 8 on the tower wall 202, preferably along the circumferential direction. Preferably, the temperature measuring element 8 is located at the upper part of the side air supply device 3 and protrudes into the interior of the tower 2. Preferably, the temperature measuring element 8 is a thermocouple temperature sensor.
Preferably, the bottom 203 of the vertical cooler A0 is provided with a plurality of discharge ports 204, preferably 4-30 discharge ports 204, more preferably 4-24 discharge ports 204, and even more preferably 8-12 discharge ports 204. Preferably, the plurality of discharge ports 204 are uniformly arranged in the circumferential direction of the bottom 203. A moving plate type discharging device 4 is arranged below each discharging hole 204.
In the invention, the hood M comprises a support frame M01, a hood top cover M02, a plurality of conical cover plates M03 and a hood air pipe M04. Wherein a plurality of conical cover plates M03 are sequentially arranged on the support frame M01. The hood top cover M02 is disposed above the topmost conical cover plate M03. The air pipe M04 is arranged below the support frame M01 and is connected with the support frame M01. Preferably, the hood top cover M02 has a tapered structure. The cone angle of the hood top cover M02 is larger than that of the cone-shaped cover plate M03.
Preferably, an air flow channel is formed between the upper and lower adjacent conical cover plates M03.
Preferably, the number of center supply branches 601 is 1 to 12, preferably 2 to 10, more preferably 4 to 8.
Preferably, the hood M of the central air supply device 6 is disposed at a middle lower portion in the tower body 2. The central air supply duct 602 is disposed outside the tower 2. One end of each central air supply branch pipe 601 and a central air supply air duct 602 and the other end communicates with the bottom or lower portion of the hood M through the tower wall 202.
Preferably, the hood M of the central air supply device 6 is located at the bottom center of the tower 2 and extends upward into the inner space of the tower 2. The central air supply duct 602 is located outside the discharge chute 7. One end of each central air supply branch pipe 601 is communicated with the central air supply duct 602 and the other end passes through the discharge chute 7 to be communicated with the bottom or lower part of the hood M.
In the present invention, the vertical cooler A0 further includes a control system K. The control system K connects the moving plate discharging device 4 and the temperature measuring element 8, and the control system K independently controls the driving device 401 of the moving plate discharging device 4 under each discharge port 204, respectively.
According to a second embodiment of the present invention, there is provided a method of cooling a sintered ore:
a method of cooling sinter or a method of using the above-described vertical cooler with a moving plate type discharge device, the method comprising the steps of:
1) The hot sinter enters the tower body 2 through the distributing device 1, the sinter continuously flows from top to bottom under the action of gravity, and enters the vertical cooler A0 for cooling;
2) Cooling air enters the tower body 2 from the side air supply device 3 and the central air supply device 6 of the vertical cooler A0, passes through the sinter material layers stacked in the tower body 2 from bottom to top, exchanges heat with the sinter, gradually increases the temperature of the cooling air after heat exchange, is discharged through the sinter material surface in the tower of the vertical cooler A0 to form high-temperature hot air, and is discharged through the hot air outlet 5; preferably, the high temperature hot wind is delivered to a waste heat utilization system;
3) After the vertical cooler A0 cools, the sintered ore is discharged from one or more discharge ports 204 onto the movable plate type discharge device 4, the sintered ore on the movable plate type discharge device 4 falls into the discharge chute 7, and is discharged from a discharge port 701 of the discharge chute 7.
In the above method, step 3) specifically includes: after the sinter is cooled by the vertical cooler A0, the control system K monitors the temperature of the sinter at the position above each discharge hole 204 according to each temperature measuring element 8 on the tower wall 202;
if the discharge requirement is met, the control system K controls the drive means 401 of the mobile plate discharging device 4 below the respective discharge opening 204, the driving device 401 drives the corresponding moving plate 402 to move, so that the sintered ore at the position of the discharge hole 204 is discharged; the sintered ore falls into the discharge chute 7 through the movable plate type discharge device 4 and is discharged from a discharge port 701 of the discharge chute 7; preferably, during discharging, the control system K detects the temperature of the sinter at the position above the discharging hole 204 through the temperature measuring element 8, and if the temperature is higher than the discharging requirement, the control system K controls the driving device 401 to stop the movement of the moving plate 402;
if the discharge requirement is not met, no discharge is performed at the discharge port 204 location.
Example 1
As shown in fig. 1, a vertical cooler A0 having a moving plate type discharging device includes a distributing device 1, a tower body 2, an edge air supply device 3, and a moving plate type discharging device 4. Column 2 includes a top 201, a wall 202 and a bottom 203. The tower top 201 is disposed on top of the tower wall 202. The bottom 203 of the column is arranged at the bottom of the column wall 202. The distributing device 1 is arranged above the tower top 201 and is communicated with the interior of the tower body 2. The side air supply device 3 is provided in the middle lower portion of the tower wall 202. The bottom 203 of the tower is provided with a discharge port 204. The moving plate type discharging device 4 is disposed below the discharging port 204. The upper part of the tower wall 202 is provided with a hot air outlet 5.
As shown in fig. 3, the side air supply device 3 includes a side air supply duct 301 and a side air supply duct 302 connected to the side air supply duct 301. Wherein the side air supply duct 301 surrounds the tower wall 202 and communicates with the interior of the tower body 2.
As shown in fig. 4, the vertical cooler A0 further includes a center air supply device 6. The central air supply device 6 comprises a hood M, a plurality of central air supply branch pipes 601, a central air supply duct 602 of a 'C' -shape and a central air supply duct 603 connected with the central air supply duct 602. Wherein the blast cap M is arranged at the middle lower part in the tower body 2 and is positioned on the central axis of the tower body 2. The central air supply duct 602 is disposed outside the tower 2. One end of each central air supply branch pipe 601 communicates with the central air supply duct 602 and the other end communicates with the lower portion of the hood M through the tower wall 202. The number of center supply branch pipes 601 is 6.
The vertical cooler A0 further comprises a discharge chute 7, the discharge chute 7 being arranged below the mobile plate-type discharge device 4. The top of the discharge chute 7 is connected with the bottom of the tower bottom 203, and the movable plate type discharge device 4 is positioned in a space formed by the discharge chute 7 and the tower bottom 203. The bottom of the discharging chute 7 is provided with a discharging hole 701.
As shown in fig. 5 and 6, the moving plate type discharging device 4 comprises a driving device 401, a moving plate 402, a bracket 403 and a push-pull rod 404. The bracket 403 is arranged below the discharge opening 204 and in the discharge chute 6. The moving plate 402 is provided on the bracket 403. The drive means 401 are arranged outside the discharge chute 6. One end of a push-pull rod 404 is connected with the driving device 401, and the other end of the push-pull rod 404 passes through the discharging chute 6 to be connected with the moving plate 402. The mobile plate discharge device further comprises a baffle 405. The baffle 405 is disposed above the moving plate 402 and is fixedly coupled to the bracket 403. The driving means 401 of the moving plate discharging device 4 is a hydraulic cylinder.
The bottom 203 of the vertical cooler A0 is provided with 8 discharge ports 204. The 8 discharge ports 204 are uniformly arranged in the circumferential direction of the bottom 203. A moving plate type discharging device 4 is arranged below each discharging hole 204.
As shown in fig. 9, the hood M includes a support frame M01, a hood top cover M02, a plurality of cone-shaped cover plates M03, and a hood air duct M04. Wherein a plurality of conical cover plates M03 are sequentially arranged on the support frame M01. The hood top cover M02 is disposed above the topmost conical cover plate M03. The air pipe M04 is arranged below the support frame M01 and is connected with the support frame M01. The hood top cover M02 is of a conical structure. The cone angle of the hood top cover M02 is larger than that of the cone-shaped cover plate M03. And an air flow channel is formed between the upper and lower adjacent conical cover plates M03.
Example 2
As shown in fig. 2, example 1 is repeated except that the hood M of the central air supply unit 6 is located at the bottom center of the tower 2 and protrudes upward into the interior space of the tower 2. The central air supply duct 602 is located outside the discharge chute 7. One end of each central air supply branch pipe 601 is communicated with the central air supply duct 602 and the other end passes through the discharge chute 7 to be communicated with the lower part of the hood M.
Example 3
Example 1 was repeated except that the vertical cooler A0 was provided with a plurality of temperature measuring elements 8 along the circumferential direction on the tower wall 202. The temperature measuring element 8 is located at the upper part of the side air supply device 3 and extends into the interior of the tower body 2. The temperature measuring element 8 is a thermocouple temperature sensor.
Example 4
Example 3 is repeated except that the vertical cooler A0 further comprises a control system K. The control system K connects the moving plate discharging device 4 and the temperature measuring element 8, and the control system K independently controls the driving device 401 of the moving plate discharging device 4 under each discharge port 204, respectively.
Use example 1
A method of cooling sinter, the method comprising the steps of:
1) The hot sinter enters the tower body 2 through the distributing device 1, the sinter continuously flows from top to bottom under the action of gravity, and enters the vertical cooler A0 for cooling;
2) Cooling air enters the tower body 2 from the side air supply device 3 and the central air supply device 6 of the vertical cooler A0, passes through the sinter material layers stacked in the tower body 2 from bottom to top, exchanges heat with the sinter, gradually increases the temperature of the cooling air after heat exchange, is discharged through the sinter material surface in the tower of the vertical cooler A0 to form high-temperature hot air, and is discharged through the hot air outlet 5; the high-temperature hot air is conveyed to a waste heat power generation system;
3) After the vertical cooler A0 cools the sinter, the sinter is discharged from 8 discharge ports 204 to the movable plate type discharge device 4, the sinter on the movable plate type discharge device 4 falls into the discharge chute 7, and is discharged from a discharge port 701 of the discharge chute 7.
Use of example 2
A method of cooling sinter, the method comprising the steps of:
1) The hot sinter enters the tower body 2 through the distributing device 1, the sinter continuously flows from top to bottom under the action of gravity, and enters the vertical cooler A0 for cooling;
2) Cooling air enters the tower body 2 from the side air supply device 3 and the central air supply device 6 of the vertical cooler A0, passes through the sinter material layers stacked in the tower body 2 from bottom to top, exchanges heat with the sinter, gradually increases the temperature of the cooling air after heat exchange, is discharged through the sinter material surface in the tower of the vertical cooler A0 to form high-temperature hot air, and is discharged through the hot air outlet 5; the high-temperature hot air is conveyed to a waste heat power generation system;
3) After the sinter is cooled by the vertical cooler A0, the control system K monitors the temperature of the sinter at the position above each discharge hole 204 according to each temperature measuring element 8 on the tower wall 202;
if the discharging requirement is met, the control system K controls the driving device 401 of the movable plate type discharging device 4 below the corresponding discharging hole 204, and the driving device 401 drives the corresponding movable plate 402 to move, so that the sintered ore at the position of the discharging hole 204 is discharged; the sintered ore falls into the discharge chute 7 through the movable plate type discharge device 4 and is discharged from a discharge port 701 of the discharge chute 7; during discharging, the control system K detects the temperature of the sintering ore at the position above the discharging port 204 through the temperature measuring element 8, and if the temperature is higher than the discharging requirement, the control system K controls the driving device 401 to stop the movement of the moving plate 402;
if the discharge requirement is not met, no discharge is performed at the discharge port 204 location.
Claims (16)
1. A vertical cooler (A0) with a movable plate type discharging device comprises a distributing device (1), a tower body (2), an edge air supply device (3) and a movable plate type discharging device (4); the tower body (2) comprises a tower top (201), a tower wall (202) and a tower bottom (203); the tower top (201) is arranged at the top of the tower wall (202); the tower bottom (203) is arranged at the bottom of the tower wall (202); the distributing device (1) is arranged above the tower top (201) and is communicated with the inside of the tower body (2); the side air supply device (3) is arranged at the middle lower part of the tower wall (202); the bottom (203) of the tower is provided with a discharge port (204); the movable plate type discharging device (4) is arranged below the discharging port (204); the upper part of the tower top (201) or the tower wall (202) is provided with a hot air outlet (5);
the vertical cooler (A0) further comprises a discharging chute (7), and the discharging chute (7) is arranged below the movable plate type discharging device (4); the movable plate type discharging device (4) comprises a driving device (401), a movable plate (402), a support (403) and a push-pull rod (404), wherein the support (403) is arranged below the discharging port (204) and is positioned in the discharging chute (7), the movable plate (402) is arranged on the support (403), the driving device (401) is arranged on the outer side of the discharging chute (7), one end of the push-pull rod (404) is connected with the driving device (401), and the other end of the push-pull rod (404) penetrates through the discharging chute (7) to be connected with the movable plate (402); the movable plate type discharging device further comprises a baffle plate (405), and the baffle plate (405) is arranged above the movable plate (402) and is fixedly connected with the bracket (403); wherein, the other sides except the discharging side are all provided with baffle plates (405), and the discharging side of the movable plate (402) is flexibly configured according to the uniformity of material flow;
the bottom (203) of the vertical cooler (A0) is provided with a plurality of discharge ports (204); the plurality of discharge ports (204) are uniformly arranged in the circumferential direction of the tower bottom (203); a movable plate type discharging device (4) is arranged below each discharging hole (204); the vertical cooler (A0) is provided with a plurality of temperature measuring elements (8) along the circumferential direction on the tower wall (202).
2. The vertical cooler according to claim 1, wherein: the vertical cooler (A0) also comprises a central air supply device (6); the central air supply device (6) comprises a hood (M), a plurality of central air supply branch pipes (601), an annular or C-shaped central air supply duct (602) and a central air supply duct (603) connected with the central air supply duct (602); wherein the hood (M) is arranged inside the tower body (2) and is positioned on the central axis of the tower body (2); the central air supply duct (602) is arranged at the outer side of the tower body (2); one end of each central air supply branch pipe (601) is communicated with the central air supply duct (602) and the other end is communicated with the bottom or the lower part of the hood (M); and/or
The side air supply device (3) comprises a side air supply duct (301) and a side air supply duct (302) connected with the side air supply duct (301), wherein the side air supply duct (301) surrounds the tower wall (202) and is communicated with the inside of the tower body (2).
3. The vertical cooler according to claim 2, wherein: the top of the discharging chute (7) is connected with the bottom of the tower bottom (203), and the movable plate type discharging device (4) is positioned in a space formed by the discharging chute (7) and the tower bottom (203); the bottom of the discharging chute (7) is provided with a discharging hole (701).
4. A vertical cooler according to any one of claims 1-3, characterized in that: the driving device (401) of the movable plate type discharging device (4) is one of a hydraulic cylinder, an electric push rod, an electro-hydraulic push rod, an electric cylinder, a linear motor or a crank sliding block mechanism.
5. A vertical cooler according to any one of claims 1-3, characterized in that: the temperature measuring element (8) is positioned at the upper part of the side air supply device (3) and extends into the tower body (2).
6. The vertical cooler according to claim 5, wherein: the temperature measuring element (8) is a thermocouple temperature sensor.
7. The vertical cooler according to any one of claims 1 to 3, 6, characterized in that: the bottom (203) of the vertical cooler (A0) is provided with 4-30 discharge ports (204).
8. The vertical cooler according to claim 7, wherein: the bottom (203) of the vertical cooler (A0) is provided with 4-24 discharge ports (204).
9. The vertical cooler according to claim 8, wherein: the bottom (203) of the vertical cooler (A0) is provided with 8-12 discharge ports (204).
10. A vertical cooler according to any one of claims 2-3, characterized in that: the hood (M) comprises a support frame (M01), a hood top cover (M02), a plurality of conical cover plates (M03) and a hood air pipe (M04), wherein the conical cover plates (M03) are sequentially arranged on the support frame (M01), the hood top cover (M02) is arranged above the topmost conical cover plate (M03), and the air pipe (M04) is arranged below the support frame (M01) and connected with the support frame (M01); and/or
The number of the central air supply branch pipes (601) is 1-12.
11. The vertical cooler according to claim 10, wherein: the hood top cover (M02) is of a conical structure; the cone angle of the hood top cover (M02) is larger than that of the cone-shaped cover plate (M03); and/or
The number of the central air supply branch pipes (601) is 2-10.
12. The vertical cooler according to claim 11, wherein: an air flow channel is formed between the upper and lower adjacent conical cover plates (M03); and/or
The number of the central air supply branch pipes (601) is 4-8.
13. The vertical cooler according to any one of claims 2 to 3, 11 to 12, characterized in that: the hood (M) of the central air supply device (6) is arranged at the middle lower part in the tower body (2); the central air supply duct (602) is arranged at the outer side of the tower body (2); one end of each central air supply branch pipe (601) is communicated with a central air supply duct (602) and the other end of each central air supply branch pipe passes through the tower wall (202) to be communicated with the bottom or the lower part of the hood (M); or (b)
The hood (M) of the central air supply device (6) is positioned at the bottom center of the tower body (2) and extends upwards into the inner space of the tower body (2); the central air supply duct (602) is positioned at the outer side of the discharge chute (7); one end of each central air supply branch pipe (601) is communicated with the central air supply duct (602) and the other end of each central air supply branch pipe passes through the discharging chute (7) to be communicated with the bottom or the lower part of the hood (M).
14. The vertical cooler according to any one of claims 1 to 3, 6, 8 to 9, 11 to 12, characterized in that: the vertical cooler (A0) further comprises a control system (K), the control system (K) is connected with the movable plate type discharging device (4) and the temperature measuring element (8), and the control system (K) is used for respectively and independently controlling a driving device (401) of the movable plate type discharging device (4) below each discharging hole (204).
15. A method of using a vertical cooler having a moving plate discharge device according to any one of claims 1-14, the method comprising the steps of:
1) The hot sinter enters the tower body (2) through the distributing device (1), and the sinter continuously flows from top to bottom under the action of gravity and enters the vertical cooler (A0) for cooling;
2) Cooling air enters the tower body (2) from the side air supply device (3) and the central air supply device (6) of the vertical cooler (A0), passes through a sinter material layer piled in the tower body (2) from bottom to top, exchanges heat with the sinter, gradually increases the temperature of the cooling air after heat exchange, is discharged from the sinter material surface in the tower of the vertical cooler (A0) to form high-temperature hot air, and is discharged from the hot air outlet (5);
3) After the sinter is cooled by the vertical cooler (A0), the sinter is discharged from a plurality of discharge holes (204) to a movable plate type discharge device (4), the sinter on the movable plate type discharge device (4) falls into a discharge chute (7), and is discharged from a discharge hole (701) of the discharge chute (7); when discharging, the driving device (401) drives the moving plate (402) to move to the discharging side through the push-pull rod (404), and the moving plate (402) brings the materials carried by the moving plate out of a certain distance under the action of the gravity and friction force of the materials; then the moving plate (402) moves a distance in the opposite direction under the action of the driving device (401), at this time, the material carried by the moving plate (402) cannot move along with the moving plate (402) due to the action of the baffle plate (405), when the moving plate (402) moves beyond the stacking position of the loaded materials, the materials are discharged from the discharging side of the moving plate (402), so that a discharging process is completed; the discharging process is continuously circulated, namely, uniform and quantitative discharging of materials is realized;
the step 3) is specifically as follows: after the sinter is cooled by the vertical cooler (A0), a control system (K) monitors the temperature of the sinter at the position above each discharge hole (204) according to each temperature measuring element (8) on the tower wall (202);
if the discharge requirement is met, the control system (K) controls the driving device (401) of the movable plate type discharging device (4) below the corresponding discharging hole (204), and the driving device (401) drives the corresponding movable plate (402) to move, so that the sintered ore at the position of the discharging hole (204) is discharged; the sinter falls into a discharge chute (7) through a movable plate type discharge device (4) and is discharged from a discharge hole (701) of the discharge chute (7); during discharging, the control system (K) detects the temperature of the sintering ore at the position above the discharging port (204) through the temperature measuring element (8) at the same time, and if the temperature is higher than the discharging requirement, the control system (K) controls the driving device (401) to stop the movement of the moving plate (402);
if the discharge requirement is not met, no discharge is performed at the discharge port (204) location.
16. The method according to claim 15, wherein: in step 2), the high temperature hot air is delivered to a waste heat utilization system.
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| CN109990605B (en) * | 2018-01-02 | 2024-06-11 | 中冶长天国际工程有限责任公司 | Vertical cooling machine with rectifying device and cooling method |
| CN110530165A (en) * | 2019-09-26 | 2019-12-03 | 中冶节能环保有限责任公司 | A kind of steel slag waste heat is using device and utilizes method |
| CN110607406A (en) * | 2019-09-26 | 2019-12-24 | 中冶节能环保有限责任公司 | A high-temperature massive steel slag heat extraction device and waste heat recovery method |
| CN114705053B (en) * | 2022-02-24 | 2022-11-22 | 中信重工机械股份有限公司 | Discharging and cooling device for shaking plate of vertical cooling furnace for sintered ore |
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