WO2010081431A1 - Annular cooler - Google Patents

Abstract

An annular cooler comprises an annular cooling hood (31) which is hanged on a bracket (40) of the annular cooler (30), and a trolley (32) which rotates around the center of the annular cooler (30); an internal annular flume (36) and a external annular flume (37) are mounted on the inner side of an internal sideboard (34) and the outer side of an external sideboard (35) of the trolley (32) respectively; the lower ends of an internal plate (38) and an external plate (39) of the annular cooling hood (31) are respectively inserted below the liquid levels of the internal annular flume (36) and the external annular flume (37) without touching the bottoms of the flumes.

Description

 A ring-cooling machine This application claims priority to Chinese Patent Application No. 200910000292.8, entitled "A Ring Cooling Machine", filed on January 16, 2009, the entire contents of which are incorporated by reference. In this application. Technical field

 The invention relates to the field of iron and steel smelting, in particular to a ring cooler which is sealed with liquid between a ring cold cover and a ring cooler trolley. Background technique

 In steel smelting, a ring cooler is used to cool the sintered material. The ring cooler is generally circular, and the sintered material is run through the ring cooler for one week in the ring cooler to complete cooling and unloading. Referring to Fig. 1 and Fig. 2, Fig. 1 is a schematic view of a conventional ring cooler, and Fig. 2 is a cross-sectional view of a radial direction of a conventional ring cooler (center of a ring cooler).

 The ring cooler 10 is divided into a high temperature zone I zone, a middle temperature zone II zone, a temperature zone III zone and a non-cooling zone zone IV, and the sintering machine (not shown) is finished to be sintered in a high temperature zone to the ring cooler. On the raft 12 of the trolley 11, the ring chiller trolley 11 rotates at a constant speed around the center of the ring chiller 10. At the same time, the cooling air blown by the air blower (not shown) passes through the raft 12 from the bottom into the trolley, and after sufficient heat exchange with the material on the raft 12, the hot flue gas is discharged from the exhaust duct 13. .

 In the high temperature zone I, the material temperature is between 700 °C and 800 °C, and the cooling air at normal temperature becomes a high temperature flue gas with a temperature of 350 °C-400 °C after sufficient heat exchange with the material in the high temperature zone. The exhaust duct 13 is discharged. After the ring cooler trolley 11 passes through the high temperature zone I zone, it runs to the middle temperature zone II zone. After cooling in the high temperature zone I zone, the material temperature is reduced. Therefore, the cooling air is formed after heat exchange with the material in the middle temperature zone II zone. The flue gas temperature is between 200 ° C and 350 ° C and is also discharged from the flue duct 13 . After passing through the middle temperature zone II zone, the ring cooler trolley 11 runs to the low temperature zone III zone, at which time the material temperature is further reduced, and the temperature of the cooling air forming the flue gas after heat exchange with the material in the low temperature zone III zone is generally lower than 200°. C. After passing through Zone III of the low temperature zone, the temperature of the material drops below 150 °C, and is sent to the next process through the non-cooling zone to complete the material cooling.

During the cooling process of the material, a large amount of hot flue gas is directly discharged into the atmosphere, which not only causes air pollution, but also causes waste of energy. For environmental protection and energy conservation, some steel companies recycle high temperature zone I Hot flue gas, using the heat energy of the high-temperature flue gas discharged from the high temperature zone I to generate electricity and produce steam; in order to increase the temperature of the high-temperature flue gas discharged from the high temperature zone I, the hot flue gas discharged from the middle temperature zone II can be collected as The cooling air in the high temperature zone I cools the material in the high temperature zone I zone.

 In order to maintain the heat of the high temperature hot flue gas during the collection process, no significant temperature drop is generated; currently, on the ring cooler trolley 11, a ring cold cover 14 is also provided for concentrating from the ring cooler trolley. Hot smoke emitted on the 11th. The ring cold cover 14 is hoisted on the bracket 15 of the ring cooler 10, and the bracket 15 and the ring cold cover 14 are fixed; since the ring cooler trolley 11 is moving, the ring cold cover 14 and the ring cooling machine There is relative movement between the cars 11. In practical applications, since the size of the ring cold cover 14 is relatively large, it is inevitable that there will be deviation during manufacture and installation, and the ring cooler trolley 11 is inevitably deviated during the turning motion. Therefore, the ring cold cover 14 and the ring cooling machine It is difficult to achieve sealing between the cars 11, causing high temperature hot flue gas in the exhaust duct 13 to be lost due to leakage, or cold air infiltration to reduce the flue gas temperature, affecting the waste heat utilization efficiency of the ring cooler 10. Summary of the invention

 The object of the present invention is to provide a ring cooler which uses a liquid sealing method between a ring cold cover and a ring cooler trolley to improve the sealing performance between the ring cold cover and the ring cooler trolley. Prevent the loss of hot flue gas in the exhaust duct due to external leakage, or prevent the flue gas temperature from being lowered due to the infiltration of cold air, to improve the efficiency of waste heat utilization.

 A ring cooler according to the present invention includes a ring cold cover hoisted on a bracket of the ring cooler, and a ring cooler trolley that rotates around a center of the ring cooler, the ring cooler trolley The inner side of the inner side panel and the outer side of the outer side panel are respectively provided with an inner annular liquid tank and an outer annular liquid tank, and the lower end of the inner side panel of the annular cold cover and the lower end of the outer side plate are respectively inserted into the inner annular liquid Below the level of the tank and the outer annular tank.

 Preferably, the lower end of the inner side plate of the ring cold cover is not in contact with the bottom plate of the inner annular liquid groove, and the lower end of the outer side plate is not in contact with the bottom plate of the outer annular liquid groove.

 Preferably, the lower portion of the inner side panel of the ring cold cover further includes an inner sealing cover, and the inner sealing cover is disposed above the inner annular liquid groove.

 Preferably, the lower portion of the outer side plate of the ring cold cover further comprises an outer sealing cover, and the outer sealing cover is disposed above the outer annular liquid groove.

Preferably, an upper end surface of the inner panel of the inner side panel is higher than a bottom surface of the inner annular liquid tank. Slightly lower than the top end of the inner annular liquid tank.

 Preferably, the upper end surface of the inner panel of the outer fence is higher than the bottom of the outer annular liquid tank, which is slightly lower than the top end of the outer annular liquid tank.

 Preferably, the inner annular liquid tank and the outer annular liquid tank have the same height and width.

 Preferably, the inner side panel and the outer side panel of the ring cold cover are polygonal, circular, or circular arc. Preferably, the inner annular liquid tank and the outer annular liquid tank are annular in shape as a whole.

 Preferably, the inner annular liquid tank and the outer annular liquid tank have a width greater than 100 mm, and the inner annular liquid tank and the outer annular liquid tank have a height greater than 200 mm.

 Compared with the prior art, the present invention has the following advantages:

 The ring-cooling machine of the invention adopts a liquid-tight manner between the ring cold cover and the ring-cooling machine trolley, and when the ring-cooling machine trolley is in motion, the inner side plate and the outer side plate of the ring cold cover are respectively in the inner annular liquid groove and the outer ring shape. The liquid in the liquid tank is swiped, and the fluid has fluidity, and the relative movement of the ring cold cover and the ring cooler trolley is not hindered by friction. Due to the fluidity and tightness of the liquid, the sealing performance of the ring cold cover and the ring cooler trolley can be improved, and the loss of hot flue gas in the exhaust pipe due to leakage can be prevented, and the leakage due to the infiltration of cold air can be prevented. The temperature of the flue gas is used to improve the efficiency of waste heat utilization, and it can also prevent dust pollution in the exhaust pipe from causing dust pollution around the ring cooler. DRAWINGS

 The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

 1 is an overall schematic view of a conventional ring cooler;

 Figure 2 is a radial cross-sectional view of a conventional ring cooler;

 Figure 3 is a radial cross-sectional view of the ring cooler of the present invention;

 Figure 4 is a schematic view of the inner annular liquid tank;

 Figure 5 is a schematic view of the outer annular liquid tank. detailed description

 Referring to Figure 3, Figure 4, Figure 5, Figure 3 is a radial cross-sectional view of the ring cooler of the present invention, Figure 4 is a schematic view of the inner annular liquid tank, and Figure 5 is a schematic view of the outer annular liquid tank.

The ring cold cover 31 is hoisted on the bracket 40 of the ring cooler 30, and the ring cooler trolley 32 is rotated around the center of the ring cooler 30, and the liquid is used between the ring cold cover 31 and the ring cooler trolley 32. The sealing method can not only ensure the relative movement between the ring cold cover 31 and the ring cooler trolley 32, but also The sealing performance between the high-ring cold cover 31 and the ring cooler trolley 32 prevents the hot flue gas in the exhaust duct 33 from being lost due to leakage, and prevents the temperature of the flue gas from being lowered due to the infiltration of cold air to improve the waste heat. usage efficiency.

 The inside of the ring cooler trolley 32 (relative to the center of the ring cooler 30) is provided with an inner fence 34 and an outer fence 35 on each side, and an inner annular liquid groove 36 is provided on the top of the inner fence 34. The top of the side fence 35 is provided with an outer annular liquid tank 37. The inner annular liquid tank 36 and the outer annular liquid tank 37 are integrally formed in a circular shape, and the center of the circular ring is the center of the ring cooler 30. The inner annular liquid tank 36 and the outer annular liquid tank 37 are filled with a certain height of liquid. The ring cold cover 31 is generally annular, the center of the ring is the center of the ring cooler 30, and the lower end of the inner side plate 38 of the ring cold cover 31 and the lower end of the outer side plate 39 are inserted into the inner annular liquid groove 36 and the outer annular liquid groove 37, respectively. Below the liquid level, but kept at a certain distance from the bottom plate of the inner annular liquid groove 36 and the outer annular liquid groove 37, respectively, not in contact.

 When the ring cooler trolley 32 is in motion, the inner side plate 38 and the outer side plate 39 of the ring cold cover 31 are respectively swiped in the liquid in the inner annular liquid groove 36 and the outer annular liquid groove 37, because the liquid has fluidity, and is not caused by The friction hinders the relative movement of the ring cold cover 31 and the ring cooler trolley 32. Also, due to the fluidity and sealing property of the liquid, the sealing performance between the ring cold cover 31 and the ring cooler trolley 32 can be improved, and the hot flue gas in the exhaust duct 33 can be prevented from being lost due to leakage, and the cause can be prevented. The cold air infiltrates to reduce the temperature of the flue gas, so as to improve the utilization efficiency of the waste heat, and also prevent dust pollution around the ring cooler 30 due to the leakage of smoke in the exhaust duct 33.

 In the waste heat recovery process, the inside of the exhaust passage 33 is a micro-negative pressure. When the waste heat recovery is not performed, the inside of the exhaust passage 33 is a slight positive pressure, and the change of the positive and negative pressure in the exhaust passage 33 causes the inner annular liquid tank 36 to be inside. The liquid vibrates on the left and right sides of the inner side plate 38, and the liquid in the outer annular liquid tank 37 vibrates on the left and right sides of the outer side plate 39, if the vibration amplitude is too large, and the heights of the inner annular liquid groove 36 and the outer annular liquid groove 37 are low, the row The hot flue gas in the flue 33 may leak from the bottom of the inner side panel 38 and the outer side panel 39, affecting the sealing effect. Therefore, the heights of the inner annular liquid groove 36 and the outer annular liquid groove 37 are required to be sufficient to prevent leakage of hot flue gas in the exhaust passage 33 due to liquid vibration. Preferably, the inner annular liquid groove 36 and the outer annular liquid groove 37 have a height greater than 200 mm.

Due to manufacturing and installation problems, the roundness of the inner side plate 38 and the outer side plate 39 of the ring cold cover 31 may be deviated. When the ring cooler trolley 32 rotates around the center of the ring cooler 30, there will be some running. The partial amount is to ensure that the ring cooler 32 is in motion, the inner side plate 38 of the ring cold cover 31 and the outer side. The side plates 39 do not rub against the side walls of the inner annular liquid groove 36 and the outer annular liquid groove 37, and the widths of the inner annular liquid groove 36 and the outer annular liquid groove 37 should be larger than twice the sum of the above deviation amounts. Preferably, the inner annular liquid groove 36 and the outer annular liquid groove 37 have a width greater than 100 mm.

 The inner annular liquid groove 36 and the outer annular liquid groove 37 may be of equal height and the like.

 The upper end surface of the inner panel 341 of the inner side panel 34 is higher than the bottom surface of the inner annular liquid groove 36, and is slightly lower than the top end of the inner annular liquid groove 36. During the waste heat recovery process, the inner panel 341 of the inner fence 34 is spaced apart from the exhaust passage 33 and the inner annular liquid groove 36 to maintain the inner annular liquid groove 36 and the exhaust passage 33 at a certain distance to block the hot flue gas in the exhaust passage 33. The heat is directly transferred to the inner annular liquid tank 36 to prevent the liquid in the inner annular liquid tank 36 from vaporizing due to continuous heating.

 Similarly, the inner panel 351 of the outer flap 35 is higher than the bottom of the outer annular tank 37, slightly lower than the top end of the outer annular tank 37. During the waste heat recovery process, the inner panel 351 of the outer fence 35 is spaced apart from the exhaust passage 33 and the outer annular liquid tank 37 to keep the outer annular liquid tank 36 and the exhaust passage 33 at a certain distance, and block the hot flue gas in the exhaust passage 33. The heat is directly transferred to the outer annular liquid tank 37 to prevent the liquid in the outer annular liquid tank 37 from vaporizing due to continuous heating.

 The lower portion of the inner side plate 38 of the ring cold cover 31 further includes an inner sealing cover 381 which is disposed above the inner annular liquid groove 36 and is not in contact with the inner annular liquid groove 36. The inner sealing cover plate 381 can prevent the inner sealing plate 381 from being arranged. The dust in the flue 33 falls into the inner annular liquid tank 36. Similarly, the lower portion of the outer side plate 39 of the ring cold cover 31 further includes an outer sealing cover 391. The outer sealing cover 391 is over the outer annular liquid groove 37 and is not in contact with the outer annular liquid groove 37. The outer sealing cover 391 can be The dust in the exhaust duct 33 is prevented from falling into the outer annular liquid tank 37.

 The inner side panel 38 and the outer side panel 39 of the ring cold cover 31 may be polygonal or circular or circular. The circular arc shape can relatively reduce the amount of deviation due to manufacturing and installation, thereby reducing the width of the inner annular liquid groove 36 and the outer annular liquid groove 37.

 The invention can be applied not only to a ring cooler in the field of iron and steel smelting, but also to a heat energy recycling system in other fields, for example, cement production, power generation and the like. The above description is only a preferred embodiment of the present invention and does not constitute a limitation of the scope of the present invention. Any modifications, equivalents, and improvements made within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims

Rights request  What is claimed is: 1. A ring cooler comprising a ring cold cover hoisted on a bracket of the ring cooler, and a ring cooler trolley rotating around a center of the ring cooler, wherein the ring The inner side of the inner side panel of the cold machine trolley and the outer side of the outer side panel are respectively provided with an inner annular liquid tank and an outer annular liquid tank, and the lower end of the inner side panel of the annular cold cover and the lower end of the outer side plate are respectively inserted Below the liquid level of the inner annular liquid tank and the outer annular liquid tank.  2. The ring cooler according to claim 1, wherein a lower end of the inner side plate of the ring cold cover is not in contact with a bottom plate of the inner annular liquid groove, and a lower end of the outer side plate and the outer ring The bottom plate of the tank is not in contact.  3. The ring cooler according to claim 1, wherein the lower portion of the inner side panel of the ring cold cover further comprises an inner sealing cover, and the inner sealing cover is disposed above the inner annular liquid groove.  4. The ring cooler according to claim 1, wherein the lower portion of the outer side plate of the ring cold cover further comprises an outer sealing cover, and the outer sealing cover is disposed above the outer annular liquid groove.  The ring cooler according to claim 1, wherein an upper end surface of the inner panel of the inner fence is higher than a bottom of the inner annular liquid tank, which is slightly lower than the inner annular liquid tank. top.  The ring cooler according to claim 1, wherein an upper end surface of the inner panel of the outer fence is higher than a bottom surface of the outer annular liquid tank, which is slightly lower than the outer annular liquid tank. top.  The ring cooler according to any one of claims 1 to 6, wherein the inner annular liquid tank and the outer annular liquid tank have the same height and width.  The ring cooler according to any one of claims 1 to 6, wherein the inner side plate and the outer side plate of the ring cold cover are polygonal, circular, or circular arc shapes.  The ring cooler according to any one of claims 1 to 6, wherein the inner annular liquid groove and the outer annular liquid groove are annular in shape as a whole.  The ring cooler according to any one of claims 1 to 6, wherein the inner annular liquid tank and the outer annular liquid tank have a width greater than 100 mm, and the inner annular liquid tank and the outer annular liquid tank The height is greater than 200mm.