Device and method for improving the operation air pressure of a sintering ring cooler air duct

Abstract

The present application belongs to the technical field of sintering ring cooling machine, and particularly relates to a device and method for improving the operation air pressure of the sintering ring cooling machine air duct. The device comprises a ring cooling machine frame, which movably supports a ring cooling machine rotary body through bolted support rollers. A ring cooling air duct is fixedly installed below the ring cooling machine frame, and a flue gas cover is hoisted above the ring cooling machine frame. An inner circle lower sealing water tank and an outer circle lower sealing water tank are welded on the ring cooling machine frame. An inner circle upper sealing water tank and an outer circle upper sealing water tank are welded on the ring cooling machine rotary body, and two lower sealing water tank water distribution plates are bolted to the ring cooling machine rotary body. Two upper sealing water tank water distribution plates are bolted to the flue gas cover. A plurality of waste heat collection pipelines are installed above the flue gas cover. Two air separation beams are welded in the ring cooling air duct. A plurality of air pressure gradient separation devices are welded in the inner circle lower sealing water tank and the outer circle lower sealing water tank. The ring cooling air duct is connected with a plurality of ring cooling air blowers through air blowing conveying pipelines. The device can improve the operation air pressure of the high-temperature section ring cooling zone air duct, effectively solve the problem of the sealing water blown to the cloth area by the high-pressure air flow in the high-temperature section ring cooling air duct near the air separation beam, and further improve the operation air pressure of the ring cooling machine air duct according to the actual production needs, thereby realizing the deep improvement of the waste heat resource utilization rate of the sintering ore production line while ensuring the stable operation of the equipment.

Description

Technical Field

[0001] This invention belongs to the field of sintering ring cooler technology, and particularly relates to a device and method for increasing the operating air pressure of the air duct of a sintering ring cooler. Background Technology

[0002] The sintering ring cooler is a key piece of equipment in the sintering ore production line. Its function is to drive the material trolley in a rotary motion while simultaneously blowing cooling air upwards through the ring cooling duct at its lower part. After thorough heat exchange, the heat carried by the hot ore is carried away, thus achieving a circulating cooling process for the sintered red ore and the reuse of waste heat from the exhaust gas. The ring cooler is divided into a feeding zone, a ring cooling zone, and a discharge zone. Because the exhaust gas in the high-temperature ring cooling zone contains the highest heat, it is easiest to reuse waste heat resources. Typically, the concentrated collection of heat from the sintered ore is achieved by increasing the operating speed of the high-temperature ring cooling blower. When the fan output pressure is increased to a certain level, an ultra-high pressure difference is created between the high air pressure in the high-temperature section annular cooling duct on one side of the baffle beam and the low air pressure (atmospheric pressure) in the material distribution area annular cooling duct (connected to the outside). High-speed airflow in the high-temperature section annular cooling zone enters through the gap between the lower sealing system and the rotating body, and is blown out from the surface of the water in the lower sealing water tank of the material distribution area. The water, driven by the airflow, creates a "water blowing" phenomenon in the material distribution area. This overflow of sealing water not only damages the annular cooler's water sealing system, affecting the stable operation of the production line equipment, but also restricts the significant improvement in the utilization rate of waste heat resources.

[0003] Therefore, while increasing the operating air pressure of the high-temperature section annular cooling duct, effectively solving the problem of high-pressure blower airflow in the high-temperature section annular cooling duct near the baffle beam driving sealing water to blow water into the material distribution area is of great significance for ensuring the stable operation of the annular cooler water sealing system and realizing the efficient reuse of waste heat in the sintering ore production line. To this end, the present invention provides a device and method for increasing the operating air pressure of the sintering annular cooler duct. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for increasing the operating air pressure of the duct of a sintering ring cooler, so as to solve the problems existing in the prior art.

[0005] The technical solution adopted by this invention to solve its technical problem is: a device for improving the operating air pressure of the sintering ring cooler duct, comprising a ring cooler frame, a ring cooler rotating body movably supported by bolted support rollers, a ring cooler duct fixedly installed below the ring cooler frame, a flue hood suspended above the ring cooler frame, an inner ring lower sealing water trough and an outer ring lower sealing water trough welded on the ring cooler frame, an inner ring upper sealing water trough and an outer ring upper sealing water trough welded on the ring cooler rotating body and bolted with two lower sealing water trough water distribution plates, two upper sealing water trough water distribution plates bolted to the flue hood, several waste heat collection pipes installed above the flue hood, two wind baffle beams welded inside the ring cooler duct, several pressure gradient separation devices welded inside both the outer ring lower sealing water trough and the inner ring lower sealing water trough, and several ring cooler blowers connected to the ring cooler duct through a blower conveying pipe.

[0006] Furthermore, the rotating body of the annular cooler has an annular structure. The inner ring lower sealing water groove and the outer ring lower sealing water groove are located on the outer side of the inner ring and outer ring at the bottom of the rotating body of the annular cooler, respectively. The cross-section of the inner ring lower sealing water groove and the outer ring lower sealing water groove are both U-shaped. The overall shape of the inner ring lower sealing water groove and the outer ring lower sealing water groove is annular and matches the outline of the inner ring and outer ring at the bottom of the rotating body of the annular cooler, respectively.

[0007] Furthermore, the free ends of the two lower sealing water tank dividing plates are located in the inner ring lower sealing water tank and the outer ring lower sealing water tank respectively, and there are gaps between them and the inner walls of the inner ring lower sealing water tank and the outer ring lower sealing water tank. The two lower sealing water tank dividing plates are both annular in shape and match the shapes of the inner ring lower sealing water tank and the outer ring lower sealing water tank respectively.

[0008] Furthermore, the sealing water grooves on the inner and outer rings are located on the outer sides of the inner and outer rings on the upper part of the rotating body of the annular cooler, respectively. The cross-sections of the sealing water grooves on the inner and outer rings are both U-shaped, and the overall shape of the sealing water grooves on the inner and outer rings is annular and matches the contours of the inner and outer rings on the upper part of the rotating body of the annular cooler, respectively.

[0009] Furthermore, the free ends of the two upper sealing water tank dividing plates are located inside the inner ring upper sealing water tank and the outer ring upper sealing water tank, respectively, and there are gaps between them and the inner walls of the inner ring upper sealing water tank and the outer ring upper sealing water tank. The two upper sealing water tank dividing plates are both annular in shape and match the shapes of the inner ring upper sealing water tank and the outer ring upper sealing water tank, respectively.

[0010] Furthermore, the bottom end of the baffle beam is welded to the inner wall of the bottom of the annular cooling duct, and the horizontal sides of the baffle beam are welded to the outer walls of the inner ring lower sealing water tank and the outer ring lower sealing water tank, respectively. The top end of the baffle beam is bolted with a baffle beam sealing soft skin. The two baffle beams are located between the high-temperature section annular cooling zone and the material distribution zone of the annular cooler, and between the unloading zone and the low-temperature section annular cooling zone, respectively.

[0011] Furthermore, a friction disc is bolted to the outer ring of the rotating body of the annular cooler to provide rotational driving torque for the rotating body.

[0012] Furthermore, a sealing soft skin is bolted to the air pressure gradient separation device, and the sealing soft skin is in contact with the corresponding lower sealing water tank water distribution plate.

[0013] A method for increasing the operating air pressure of the sintering ring cooler duct is proposed. The number of air pressure gradient separation devices to be installed is determined according to the working air pressure of the ring cooler duct. After installation, several air pressure gradient separation zones are formed between the air pressure gradient separation devices. Based on the unit air pressure difference of each air pressure gradient separation zone, the ultra-high pressure difference between the high air pressure in the high-temperature section of the ring cooler duct on one side of the baffle beam and the low air pressure in the ring cooler duct in the fabric distribution area is gradually reduced, thereby realizing the decomposition of air pressure gradient.

[0014] The present invention has the following beneficial effects:

[0015] 1. This invention can improve the operating air pressure of the high-temperature section annular cooling duct while effectively solving the problem of high-pressure blower airflow in the high-temperature section annular cooling duct near the baffle beam driving sealing water to blow water into the material distribution area. Thus, the operating air pressure of the annular cooling duct can be further improved according to actual production needs, and the utilization rate of waste heat resources of sintering ore production line can be greatly improved while ensuring stable and smooth operation of the equipment.

[0016] 2. This invention uses a pressure gradient separation device to construct pressure gradient separation zones in the inner and outer ring lower sealing water tanks. This gradually reduces the ultra-high pressure difference between the high air pressure in the high-temperature section of the cooling air duct on one side of the windbreak beam and the low air pressure (atmospheric pressure) in the cooling air duct of the fabric area, thereby achieving pressure gradient decomposition and solving the "water blowing" problem of the water seal system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the facade of the present invention.

[0018] Figure 2 This is a top-view cross-sectional structural diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the liquid level distribution in the inner ring lower sealing water tank and the outer ring lower sealing water tank within the annular cooling zone of the annular cooler of the present invention.

[0020] Figure 4 This is a schematic diagram of the liquid level distribution in the inner ring lower sealing water tank and the outer ring lower sealing water tank within the unloading area of ​​the annular cooler of the present invention.

[0021] Figure 5 This is a schematic diagram of the liquid level distribution in the inner ring lower sealing water tank and the outer ring lower sealing water tank within the fabric distribution area of ​​the ring cooler of the present invention.

[0022] Figure 6 This is a schematic diagram of the cross-sectional structure of the windbreak beam of the present invention.

[0023] Figure 7 This is a schematic diagram of the installation structure of the air pressure gradient separation device of the present invention.

[0024] Figure 8 This is a schematic diagram of the liquid level and airflow distribution after the gas pressure gradient separation device of this invention is installed.

[0025] Figure 9 This is a schematic diagram of the liquid level and gas pressure distribution after the gas pressure gradient separation device of the present invention is set.

[0026] Figure 10 This is a schematic diagram of the liquid level and airflow distribution when the pressure gradient separation device is not installed in this invention.

[0027] Figure 11 This is a schematic diagram of the liquid level and gas pressure distribution when the gas pressure gradient separation device is not installed in this invention.

[0028] The components are: 1. Support roller; 2. Inner ring lower sealing water trough; 3. Lower sealing water trough water distribution plate; 4. Circular cooler rotating body; 5. Inner ring upper sealing water trough; 6. Upper sealing water trough water distribution plate; 7. Flue gas hood; 8. Waste heat collection pipeline; 9. Outer ring upper sealing water trough; 10. Air baffle beam sealing soft skin; 11. Air baffle beam; 12. Friction disc; 13. Air pressure gradient separation device; 131. Sealing soft skin; 14. Outer ring lower sealing water trough; 15. Circular cooler air duct; 16. Blower conveying pipeline; 17. Circular cooler blower; 18. Circular cooler frame. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0030] Example 1:

[0031] like Figure 1-7 As shown, a device for increasing the operating air pressure of the sintering ring cooler duct includes a ring cooler frame 18. The ring cooler frame 18 movably supports the ring cooler rotating body 4 through bolted support rollers 1. The support rollers 1 provide vertical physical support for the ring cooler rotating body 4.

[0032] A ring-cooling air duct 15 is fixedly installed below the ring-cooling machine frame 18, and a flue hood 7 is suspended above the ring-cooling machine frame 18. The function of the flue hood 7 is to seal off the exhaust gas and dust.

[0033] The inner ring lower sealing water groove 2 and the outer ring lower sealing water groove 14 are welded on the ring cooler frame 18. The inner ring upper sealing water groove 5 and the outer ring upper sealing water groove 9 are welded on the ring cooler rotating body 4 and two lower sealing water groove water distribution plates 3 are bolted to it. Two upper sealing water groove water distribution plates 6 are bolted to the flue gas hood 7.

[0034] Several waste heat collection pipes 8 are installed above the flue hood 7. The function of the waste heat collection pipes 8 is to collect the high-temperature exhaust gas from the sintering ring cooler and transfer the exhaust gas to the waste heat conversion system to realize the conversion of thermal energy into electrical energy and other energy forms.

[0035] Two air-blocking beams 11 are welded inside the annular cooling duct 15. Several air pressure gradient separation devices 13 are welded inside the outer ring lower sealing water tank 14 and the inner ring lower sealing water tank 2. Several annular cooling blowers 17 are connected to the annular cooling duct 15 through the blower conveying pipe 16.

[0036] The rotating body 4 of the annular cooler has an annular structure. The inner ring lower sealing water groove 2 and the outer ring lower sealing water groove 14 are located on the outer side of the inner ring and outer ring at the bottom of the rotating body 4, respectively. The cross-section of the inner ring lower sealing water groove 2 and the outer ring lower sealing water groove 14 is U-shaped. The overall shape of the inner ring lower sealing water groove 2 and the outer ring lower sealing water groove 14 is annular and matches the outline of the inner ring and outer ring at the bottom of the rotating body 4, respectively.

[0037] The free ends of the two lower sealing water tank dividing plates 3 are located within the inner ring lower sealing water tank 2 and the outer ring lower sealing water tank 14, respectively, and there are gaps between them and the inner walls of the inner ring lower sealing water tank 2 and the outer ring lower sealing water tank 14. The two lower sealing water tank dividing plates 3 are both annular in shape and match the shapes of the inner ring lower sealing water tank 2 and the outer ring lower sealing water tank 14, respectively. This is used to form a dynamic-hydraulic seal within the inner ring lower sealing water tank 2 and the outer ring lower sealing water tank 14.

[0038] The inner ring upper sealing water groove 5 and the outer ring upper sealing water groove 9 are located on the outer side of the inner ring and outer ring of the upper part of the ring cooler rotating body 4, respectively. The cross-section of the inner ring upper sealing water groove 5 and the outer ring upper sealing water groove 9 is U-shaped. The overall shape of the inner ring upper sealing water groove 5 and the outer ring upper sealing water groove 9 is annular and matches the outline of the inner ring and outer ring of the upper part of the ring cooler rotating body 4, respectively.

[0039] The free ends of the two upper sealing water tank dividing plates 6 are located within the inner ring upper sealing water tank 5 and the outer ring upper sealing water tank 9, respectively, and have gaps with the inner walls of the inner ring upper sealing water tank 5 and the outer ring upper sealing water tank 9. The two upper sealing water tank dividing plates 6 are both annular in shape and match the shapes of the inner ring upper sealing water tank 5 and the outer ring upper sealing water tank 9, respectively. This is used to form a dynamic-hydraulic seal within the inner ring upper sealing water tank 5 and the outer ring upper sealing water tank 9.

[0040] When the annular cooling blower 17 is performing blowing operations, the distribution of sealing liquid levels in the inner ring lower sealing water tank 2 and the outer ring lower sealing water tank 14 in the annular cooling zone, unloading zone, and material distribution zone of the annular cooler is as follows: Figure 3-5 As shown.

[0041] The bottom end of the baffle beam 11 is welded to the inner wall of the bottom of the annular cooling duct 15. The horizontal sides of the baffle beam 11 are welded to the outer walls of the inner ring lower sealing water tank 2 and the outer ring lower sealing water tank 14, respectively. A baffle beam sealing soft skin 10 is bolted to the top of the baffle beam 11 to form a dynamic seal with the component unit of the rotating body 4 of the annular cooler. Together with the baffle beam 11, this reduces the leakage of cooling air from the annular cooling duct 15 to the material distribution area and the unloading area, improving the cooling effect on the sintered ore. The two baffle beams 11 are located between the high-temperature section annular cooling zone and the material distribution area, and between the unloading area and the low-temperature section annular cooling zone of the annular cooler, respectively. The function of the baffle beam 11 is to isolate the annular cooling duct 15, reducing the leakage of cooling air from the annular cooling duct 15 to the material distribution area and the unloading area, thus improving the annular cooling effect. A schematic diagram of the cross-sectional structure of the baffle beam 11 is shown below. Figure 6 As shown.

[0042] A friction disc 12 is bolted to the outer ring of the rotating body 4 of the annular cooler to provide rotational driving torque for the rotating body. The rotating body 4 of the annular cooler rotates under the support of the support roller 1 and the driving action of the friction disc 12, realizing the periodic process cooling of sintered red ore from feeding to annular cooling to unloading.

[0043] A sealing soft skin 131 is bolted to the air pressure gradient separation device 13. Each sealing soft skin 131 is in contact with the corresponding lower sealing water tank dividing plate 3, thus forming a dynamic seal during operation. The installation of the air pressure gradient separation device 13 is as follows: Figure 7 As shown.

[0044] Example 2:

[0045] This embodiment provides a method for increasing the operating air pressure of the sintering ring cooler duct. This embodiment is based on Embodiment 1.

[0046] like Figure 8-9 As shown, after installing several pressure gradient separation devices 13 according to the working air pressure of the annular cooling duct 15, pressure gradient separation zones a, b, c... are formed between the pressure gradient separation devices 13. Based on the unit air pressure difference of each pressure gradient separation zone a, b, c..., the ultra-high pressure difference between the high air pressure in the high-temperature section of the annular cooling duct 15 on one side of the baffle beam 11 and the low air pressure (atmospheric pressure) in the fabric area annular cooling duct 15 is gradually reduced, thereby realizing the decomposition of air pressure gradient.

[0047] When the pressure gradient separation device 13 is installed, the wind pressure gradient decreases between each pressure gradient separation zone, and the water level difference changes gradient (Δh2>Δh3>Δh3). After the high-speed airflow is decomposed, it no longer blows out the water sealing medium inside the lower sealing water tank, thus solving the "blowing water" phenomenon.

[0048] Comparative Example 1:

[0049] The difference between this comparative example and Example 2 is that the pressure gradient separation device 13 was not installed.

[0050] like Figure 10-11 As shown, when the pressure gradient separation device 13 is not installed, when the operating speed of the blower in the high-temperature section ring cooling zone increases to a certain level, the air pressure in the high-temperature zone ring cooling duct 15 on one side of the baffle beam 11 and the atmospheric pressure in the fabric area ring cooling duct 15 form an ultra-high pressure difference. The high-speed airflow enters from the gap between the outer ring lower sealing water tank 14, the inner ring lower sealing water tank 2 and the ring cooling machine rotating body 4, and blows out from the water surface, forming a high water level difference Δh1. The water sealing medium inside the outer ring lower sealing water tank 14 and the inner ring lower sealing water tank 2 forms a "blowing" phenomenon in the fabric area under the drive of the airflow.

[0051] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the inventive concept should fall within the protection scope of the present invention.

[0052] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A device for increasing the operating air pressure of the duct of a sintering ring cooler, characterized in that, The system includes a ring cooler frame, which movably supports the ring cooler rotating body via bolted support rollers. A ring cooler duct is fixedly installed below the ring cooler frame, and a flue hood is suspended above the ring cooler frame. An inner ring lower sealing water trough and an outer ring lower sealing water trough are welded onto the ring cooler frame. An inner ring upper sealing water trough and an outer ring upper sealing water trough are welded onto the ring cooler rotating body, and two lower sealing water trough water distribution plates are bolted to them. Two upper sealing water trough water distribution plates are bolted to the flue hood. Several waste heat collection pipes are installed above the flue hood. Two wind baffle beams are welded inside the ring cooler duct. Several air pressure gradient separation devices are welded inside both the outer ring lower sealing water trough and the inner ring lower sealing water trough. Several ring cooler blowers are connected to the ring cooler duct via a blower conveying pipe. The pressure gradient separation device is bolted with a sealing soft skin, which is in contact with the corresponding lower sealing water tank water distribution plate to reduce the ultra-high pressure difference formed by the high air pressure in the high-temperature section of the cooling air duct on one side of the air baffle beam and the low air pressure in the cooling air duct of the fabric area.

2. The device for increasing the operating air pressure of the sintering ring cooler duct according to claim 1, characterized in that, The rotating body of the annular cooler has an annular structure. The inner ring lower sealing water groove and the outer ring lower sealing water groove are located on the outer side of the inner ring and outer ring at the bottom of the rotating body of the annular cooler, respectively. The cross-section of the inner ring lower sealing water groove and the outer ring lower sealing water groove are both U-shaped. The overall shape of the inner ring lower sealing water groove and the outer ring lower sealing water groove is annular and matches the outline of the inner ring and outer ring at the bottom of the rotating body of the annular cooler, respectively.

3. The device for increasing the operating air pressure of the sintering ring cooler duct according to claim 2, characterized in that, The free ends of the two lower sealing water tank dividing plates are located in the inner ring lower sealing water tank and the outer ring lower sealing water tank respectively, and there are gaps between them and the inner walls of the inner ring lower sealing water tank and the outer ring lower sealing water tank. The two lower sealing water tank dividing plates are both annular in shape and match the shapes of the inner ring lower sealing water tank and the outer ring lower sealing water tank respectively.

4. The device for increasing the operating air pressure of the sintering ring cooler duct according to claim 2, characterized in that, The inner ring upper sealing water groove and the outer ring upper sealing water groove are located on the outer side of the inner ring and outer ring of the upper part of the ring cooler rotating body, respectively. The cross-section of the inner ring upper sealing water groove and the outer ring upper sealing water groove are both U-shaped. The overall shape of the inner ring upper sealing water groove and the outer ring upper sealing water groove are both annular and match the contour of the inner ring and outer ring of the upper part of the ring cooler rotating body, respectively.

5. The device for increasing the operating air pressure of the sintering ring cooler duct according to claim 4, characterized in that, The free ends of the two upper sealing water tank dividing plates are located inside the inner ring upper sealing water tank and the outer ring upper sealing water tank, respectively, and there are gaps between them and the inner walls of the inner ring upper sealing water tank and the outer ring upper sealing water tank. The two upper sealing water tank dividing plates are both annular in shape and match the shapes of the inner ring upper sealing water tank and the outer ring upper sealing water tank, respectively.

6. The device for increasing the operating air pressure of the sintering ring cooler duct according to claim 1, characterized in that, The bottom end of the baffle beam is welded to the inner wall of the bottom of the ring cooling duct. The horizontal sides of the baffle beam are welded to the outer walls of the inner ring lower sealing water tank and the outer ring lower sealing water tank, respectively. The top end of the baffle beam is bolted with a baffle beam sealing soft skin. The two baffle beams are located between the high-temperature section ring cooling zone and the material distribution zone of the ring cooler, and between the unloading zone and the low-temperature section ring cooling zone, respectively.

7. The device for increasing the operating air pressure of the sintering ring cooler duct according to claim 1, characterized in that, A friction disc is bolted to the outer ring of the rotating body of the annular cooler to provide rotational driving torque for the rotating body.

8. A method for increasing the operating air pressure of the sintering ring cooler duct according to any one of claims 1-7, characterized in that, The number of pressure gradient separation devices to be installed is determined based on the working air pressure of the annular cooling duct. After installation, several pressure gradient separation zones are formed between the pressure gradient separation devices. Based on the unit air pressure difference of each pressure gradient separation zone, the ultra-high pressure difference between the high air pressure in the high-temperature section of the annular cooling duct on one side of the baffle beam and the low air pressure in the annular cooling duct of the fabric area is gradually reduced, thereby realizing the decomposition of the air pressure gradient.

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