Flexible composite sealing device and sintering circular cooler

Abstract

The invention discloses a flexible combined type sealing device and a sintering circular cooler, and belongs to the technical field of sintering circular coolers. The sealing device comprises at least one flexible isolator sealing pressure regulating unit which is arranged in the moving direction of a trolley of the sintering circular cooler, and each flexible isolator sealing pressure regulating unit comprises a steel wire curtain layer capable of falling to the surface of sintered ore along with gravity, a fixing piece and a connecting piece, wherein the fixing piece and the connecting piece are used for connecting the steel wire curtain layer to the inner side of a smoke hood. The two rotatable bolts are arranged in the middle of the outer side of the air outlet pipe, the two iron wires on the two sides of the upper end of the steel wire curtain layer are made to ascend by rotating the two bolts, and therefore the whole steel wire curtain layer is made to ascend. And the air seal sealing pressure regulating unit is matched with the flexible isolation body sealing pressure regulating unit and can spray hot air to the two sides of the lower end of the steel wire curtain layer, so that air seal is formed between the two sides of the steel wire curtain layer and the trolley.

Description

Technical Field

[0001] The invention relates to the technical field of sintering ring coolers, and in particular to a flexible composite sealing device and a sintering ring cooler. Background Art

[0002] As a key equipment in the production process of oxidized pellets, the main function of the sintering ring cooler is to remove most of the heat of the oxidized pellets through the slow rotation of the sintering ring cooler and the flow of cold air from bottom to top in the sintering ring cooler, thereby effectively reducing the high temperature state of the oxidized pellets. With the rapid development of sintering ore cooling technology, large-scale sintering ring coolers emit hundreds of thousands to millions of cubic meters of hot waste gas per hour, which is not only the largest part of the waste heat emitted by steel enterprises, but also the focus of waste heat recovery. Recycling the sintering ore cooling flue gas at 200℃-600℃ as much as possible is the key to improving the utilization rate of sintering waste heat.

[0003] However, in actual production, in order to avoid accidents caused by friction between the trolley and the smoke hood during movement, a distance of about 50-100mm is generally maintained between the trolley and the smoke hood, which will cause a large amount of cold air to enter the smoke hood, thereby affecting the waste heat recovery effect. In order to solve the above problems, after searching, Chinese patent CN112857062A discloses a ring cooler, a ring cooling method for sintered ore and a sintered ore waste heat recovery system. The ring cooler trolley and the upper cover of the ring cooler are sealed, and the exhaust fan forms a negative pressure in the upper cover of the ring cooler by exhausting air. The ring cooler uses the negative pressure in the upper cover of the ring cooler to suck cold air from the bottom of the ring cooler trolley. When the cold air flows through the ring cooler trolley from bottom to top, it cools the sintered ore and heats up to form hot air. The hot air flows through the upper cover of the ring cooler, the hot air recovery hood, and the pipeline in turn and is discharged by the exhaust fan. The structure of this patent can reduce invalid wind, but the structure still needs to be further improved. Summary of the invention

[0004] 1. Problem to be solved

[0005] In order to solve the problems in the prior art, the present invention proposes a flexible composite sealing device and a sintering ring cooler, which can achieve at least one of the following purposes: 1) It can effectively avoid heat exchange between different temperature sections in the smoke hood, prevent the intrusion of cold air between the trolley and the material layer, increase the temperature of the high-temperature flue gas to supply the waste heat boiler, and prevent heat exchange between the flue gas in different temperature sections in the smoke hood; 2) Improve the sealing effect between the smoke hood and the sintering ore layer.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0008] The first aspect of the present invention provides a flexible composite sealing device, comprising at least one flexible isolator sealing pressure regulating unit arranged along the moving direction of the trolley of the sintering ring cooler, wherein the flexible isolator sealing pressure regulating unit comprises a steel wire curtain layer that can fall to the surface of the sintered ore with gravity and a fixing member and a connecting member for connecting the steel wire curtain layer to the inner side of the smoke hood; two rotatable bolts (fixing members) are arranged in the middle of the outer side of the air outlet pipe, and by rotating the two bolts, two iron wires (connecting members) on both sides of the upper end of the steel wire curtain layer are raised, thereby raising the entire steel wire curtain layer;

[0009] An air-sealed pressure regulating unit matched with the flexible isolating body sealing pressure regulating unit can spray hot air to both sides of the lower end of the steel wire curtain layer, so that an air-sealed seal is formed between both sides of the steel wire curtain layer and the trolley.

[0010] The reason for the analysis is: during actual use on site, it was found that air leaks would occur on both sides of the steel wire curtain layer, but the sealing effect in the middle was better, and the wind speed at the duct outlet of the air-sealed pressure regulating device was fast on both sides and slower in the middle. The sealing effect would be better after combining with the steel wire curtain layer.

[0011] In addition, the hot air ejected by the air-sealed pressure regulating unit is ejected downward rapidly, and at least part of the hot air will fall on the surface of the sintered ore. Under the blowing action of the hot air, some dust will also be caused. The steel wire curtain layer is located on one side of the air-sealed pressure regulating unit, which can block some large particles of dust.

[0012] As mentioned above, the hot air can also come from external hot air, such as exhaust gas from waste heat power generation and the like.

[0013] According to any embodiment of the first aspect of the purpose of the present invention, the air-sealed pressure regulating unit includes a lead-out component for hot air led out from the chimney, the lead-out component includes an air outlet pipe connected to the partition, the inner side of the air outlet pipe is provided with a guide vane inclined from top to bottom, the guide vane is recessed toward the inclined side and extends to the end face of the air outlet pipe (the guide vane serves to stabilize the flow rate and pressure of the incoming wind, because the addition of the guide vane reduces the cross-section of the air outlet pipe, thereby increasing the flow rate), so that an air outlet gap is formed between the pipe mouth of the air outlet pipe and the guide vane, the air outlet gap is located above the surface of the sintered ore, and can spray hot air to both sides of the steel curtain layer.

[0014] According to any embodiment of the first aspect of the present invention, the hot air preferably comes from the hot air of the ring cooler itself. Therefore, the partition divides the interior of the smoke hood into several sections. For the structural design of the present invention, the hot air comes from a temperature section, and the air outlet pipe is fixed to the temperature section corresponding to the partition.

[0015] If the hot air from other temperature ranges is drawn in, there are two situations: 1) The temperature is higher than that of the temperature range. Due to the different heating conditions on the inner and outer sides of the guide vane, it is very easy to cause thermal deformation; 2) The temperature is lower than that of the temperature range. At that time, the dynamic pressure head of the air outlet duct will be higher than the hot air in that temperature range, which will inevitably increase the power of the induced draft fan and cause more energy consumption.

[0016] According to any embodiment of the first aspect of the present invention, the guide plate 13 tilted from top to bottom, wherein the inclination angle is 50-75°, can be 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68°, 69°, 70°, 71°, 72°, 73°, 74°, 75°, preferably 60°. After a large number of tests, it was found that at this angle, the hot air ejected from the air outlet gap has a flow rate that meets the design requirements and can reduce the impact of the hot air.

[0017] According to any embodiment of the first aspect of the present invention, the cross-section of the guide plate is an arc-shaped depression or a trapezoidal depression, and the distance between the two sides of the guide plate and the air outlet pipe is close, and the distance between the middle and the air outlet pipe is far, so that the wind speed on both sides of the air outlet gap is fast, and the wind speed in the middle is slow. After a large number of tests, it was found that the width of the outlet on both sides is more than 1.6 times the width of the slit, and the width of the middle outlet is more than 1 times the width of the slit, so as to ensure that the gas velocity flowing out of the outlet is sufficient, which can make the air sealing effect better.

[0018] The cross section of the guide plate is an arc-shaped depression. The design of the arc-shaped surface makes the surface of the guide plate smooth, and the hot air has little resistance when it is ejected along the surface of the guide plate. The purpose of rapid ejection is achieved by controlling the flow rate of the variable diameter.

[0019] In addition, the cross-section of the guide plate is a trapezoidal depression. Although it is relatively simple to process and manufacture and meets the design purpose of the present invention, there are sharp-angle structures therein. Under heat conditions (the jetted hot air is drawn from the chimney, and the temperature is about 100-200°C), due to the stress concentration at the sharp corners of the metal material, once it expands due to heat, it is prone to cracking, which is better than the arc-shaped depression.

[0020] According to any embodiment of the first aspect of the purpose of the present invention, the air-tight sealed pressure regulating unit also includes an air supply component capable of drawing out the hot air from the chimney, which includes at least one induced draft duct and a fan placed on the induced draft duct; the outlet of the induced draft duct and the inlet of the air outlet duct can be connected by flanges or by using iron sheets designed to extend around their inlet and outlet and screwed on with bolts.

[0021] According to any implementation scheme of the first aspect of the purpose of the present invention, the air-sealed pressure regulating unit also includes a hot air guide component connected to the air duct, which includes at least one bellows, and the bellows is arranged in the vertical direction of the air duct, and the bellows is designed as a rectangular bellows; the bellows is built with a truncated cone-shaped guide plate (to make the air supply with uneven flow rate and pressure more stable, and directly enter the air outlet pipe through the truncated cone-shaped guide plate to reduce eddy current loss), and the hot air is collected and uniformly guided at the bellows. The upper and lower ends of the truncated cone-shaped guide plate are respectively fixed to the middle position of the bellows and the inlet position of the air outlet pipe by welding.

[0022] According to any embodiment of the first aspect of the present invention, taking into account the maintenance of the entire flexible composite sealing device, at least one valve is provided on the air duct. Preferably, two valves are provided on the air duct, which can control the air supply volume on the one hand, and on the other hand, the fan, air duct, bellows, guide vane and air outlet duct can be maintained by adjusting the two valves.

[0023] According to any embodiment of the first aspect of the present invention, the steel wire curtain layer is designed by a steel wire layer, a thermal insulation material and a steel wire layer, and the inner and outer steel wire layers can fix the thermal insulation material inside.

[0024] Specifically, the insulation material fixed by the steel wire layers on the inner and outer sides is made of plastic high-temperature resistant plastic, such as HIPS Shanghai Saike HIPS-514, polyetheretherketone PEEK450CA30, and semi-aromatic nylon PPAPA9T, which are completely spread out inside the inner and outer steel wire layers, and the steel wire is made into an "S" shape inside the steel wire curtain to ensure that the plastic high-temperature resistant plastic material will not swing up and down, left and right inside the steel wire curtain, and gather together, thereby achieving a better sealing effect.

[0025] The second aspect of the present invention provides a sintering ring cooler, comprising a trolley and a smoke hood, wherein the smoke hood is provided with a partition for separating different temperature sections inside; and further comprising the flexible composite sealing device described in the first aspect.

[0026] According to any embodiment of the second aspect of the present invention, the air outlet duct is fixed to the outer side of the partition by welding to maintain the stability of the flexible composite sealing device.

[0027] 3. Beneficial effects

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The flexible composite sealing device of the present invention adopts the cooperation of the flexible isolator sealing pressure regulating unit and the air-sealing sealing pressure regulating unit, which can effectively avoid heat exchange between different temperature sections in the smoke hood, prevent cold air from entering between the trolley and the material layer, increase the temperature of the high-temperature section flue gas to supply the waste heat boiler, and prevent heat exchange between the flue gas in different temperature sections in the smoke hood; the air-sealing sealing pressure regulating unit can spray hot air to both sides of the lower end of the steel wire curtain layer, so that an air-sealing seal is formed between the two sides of the steel wire curtain layer and the trolley, thereby improving the sealing effect between the smoke hood and the sintered ore layer;

[0030] (2) In the flexible composite sealing device of the present invention, a guide plate is arranged on the inner side of the air outlet pipe and is arranged obliquely from top to bottom. The guide plate is recessed toward the inclined side and extends to the end face of the air outlet pipe. The guide plate serves to stabilize the flow velocity and pressure of the incoming wind. Since the addition of the guide plate reduces the cross section of the air outlet pipe, the flow velocity is increased, so that an air outlet gap is formed between the pipe opening of the air outlet pipe and the guide plate.

[0031] (3) The flexible composite sealing device of the present invention generates dust during movement because the steel curtain layer is in direct contact with the surface of the sintered ore. The guide plate makes the air outlet duct constricted, which can prevent dust from entering the air outlet duct to a certain extent, especially when no air is emitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0033] Figure 1 It is a front view of the flexible composite sealing device of the present invention;

[0034] Figure 2 A top view of the flexible composite sealing device of the present invention;

[0035] Figure 3 is a side view of the flexible composite sealing device of the present invention;

[0036] Figure 4 A top view of a guide vane of a flexible composite sealing device of the present invention;

[0037] Figure 5 It is a front view of the connection of the flexible isolator sealing pressure regulating device of the present invention;

[0038] Figure 6 A bottom view of the bellows of the present invention;

[0039] Figure 7 A top view of the bellows of the present invention;

[0040] Figure 8 It is a schematic structural diagram of the steel cord layer of the present invention;

[0041] Description of reference numerals:

[0042] 1. Chimney; 2. First valve; 3. Fan; 4. Second valve; 5. Air duct; 6. Bellows; 7. Cone-shaped guide vane; 8. Bolts; 9. Iron wire; 10. Steel wire curtain layer; 10-1. Steel wire layer; 10-2 Insulation material; 11. Air outlet duct; 12. Partition; 13. Guide vane; 14. Air outlet gap; 15. Sintered ore; 16. Smoke hood; 17. Trolley. DETAILED DESCRIPTION

[0043] Exemplary embodiments of the present invention are described in detail below. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to implement the present invention, it should be understood that other embodiments may be implemented and various changes may be made to the present invention without departing from the spirit and scope of the present invention. The more detailed description of the embodiments of the present invention below is not intended to limit the scope of the claimed invention, but is merely for illustration and does not limit the description of the features and characteristics of the present invention, in order to propose the best mode for performing the present invention, and is sufficient to enable those skilled in the art to implement the present invention. Therefore, the scope of the present invention is limited only by the appended claims.

[0044] At present, sintering production mainly adopts a blast-type ring cooler. This equipment uses air in the form of cross-flow to cool the sintered ore 15. The equipment divides the cooled exhaust gas into 4 to 5 sections, among which the high-temperature cooling exhaust gas in the 1st to 2nd sections (temperature of about 200°C to 400°C) is used for waste heat utilization, while the subsequent 3rd to 5th sections with lower temperatures (temperature less than 200°C) are naturally released and not utilized. The above-mentioned temperature sections are realized by using the partition 12 arranged on the inner side of the smoke hood 16.

[0045] During actual use on site, it was found that air leaked on both sides of the lower end of the steel wire curtain layer 10, but the sealing effect in the middle was better. The wind speed at the air duct outlet of the air-sealed pressure regulating device was fast on both sides and slower in the middle. The sealing effect would be better after combining with the steel wire curtain layer 10.

[0046] The present invention can be used for a sintering ring cooler, which includes a trolley 17 and a smoke hood 16. The smoke hood 16 is equipped with a partition 12 for separating different temperature sections inside. There is a certain height difference between the partition 12 and the surface of the sintered ore 15; the air outlet pipe 11 is fixed to the outside of the partition 12 by welding to maintain the stability of the flexible composite sealing device.

[0047] Example 1

[0048] like Figures 1 to 8 As shown, the flexible composite sealing device of this embodiment includes a trolley 17 moving along the sintering ring cooler (such as Figure 1 A flexible isolator sealing pressure regulating unit (in the direction of the arrow) and an air-sealing sealing pressure regulating unit matched with the flexible isolator sealing pressure regulating unit; the air-sealing sealing pressure regulating unit can spray hot air to both sides of the lower end of the steel curtain layer 10, so that an air-sealing seal is formed between both sides of the steel curtain layer 10 and the trolley 17. The hot air can come from external hot air, such as the tail gas of waste heat power generation, etc.; it can also be the exhaust gas of the ring cooler itself, such as the low-temperature exhaust gas of the 3rd to 5th sections.

[0049] Among them, Figure 1 , Figure 2 and Figure 5 As shown, the flexible insulation sealing pressure regulating unit includes a steel wire curtain layer 10 that can fall to the surface of the sintered ore 15 with gravity and a fixing and a connecting piece for connecting the steel wire curtain layer 10 to the inner side of the smoke hood 16; two rotatable bolts 8 (fixing pieces) are arranged in the middle of the outer side of the air outlet pipe 11, and by rotating the two bolts 8, the two iron wires 9 (connecting pieces) on both sides of the upper end of the steel wire curtain layer 10 are raised, thereby raising the entire steel wire curtain layer 10.

[0050] In addition, if Figure 8 As shown, the steel wire curtain layer 10 of the present invention is designed to be composed of a steel wire layer 10-1, a heat insulating material 10-2 and a steel wire layer 10-1, and the inner and outer steel wire layers can fix the heat insulating material inside. It should be emphasized that the heat insulating material fixed by the steel wire layers on both sides of the inner and outer sides preferably adopts HIPS Shanghai Saike (HIPS-514) plastic high temperature resistant plastic, so that it is fully spread inside the inner and outer steel wire curtains, and the steel wires of the steel wire layer are made into an "S" shape inside the steel wire curtain to ensure that the plastic high temperature resistant plastic material will not swing up and down or left and right inside the steel wire curtain, and gather together, so as to achieve a better sealing effect.

[0051] In order to achieve the purpose of the present invention, this embodiment provides a structure such as Figure 1 and Figure 4As shown, the air-sealed pressure regulating unit includes a hot air outlet component, and the outlet component includes an air outlet pipe 11 (square inlet) connected to the partition 12, and a guide plate 13 is arranged on the inner side of the air outlet pipe 11 and is inclined from top to bottom. The guide plate 13 is recessed toward the inclined side and extends to the end face of the air outlet pipe 11 (the air outlet pipe 11 is generally designed to be flush with the end of the partition 12). The guide plate 13 serves to stabilize the flow rate and pressure of the incoming wind, because the addition of the guide plate 13 reduces the cross-section of the air outlet pipe 11, thereby increasing the flow rate, so that an air outlet gap 14 is formed between the pipe mouth of the air outlet pipe 11 and the guide plate 13, and the air outlet gap 14 is located above the surface of the sintered ore 15, and can spray hot air to both sides of the steel curtain layer 10.

[0052] The preferred hot air comes from the hot air of the annular cooler itself, so the partition 12 divides the inside of the smoke hood 16 into several sections. For the structural design of the present invention, the hot air comes from which temperature section, and the air outlet pipe 11 is fixed to the temperature section corresponding to the partition 12. From a certain perspective, the device of the present invention is conducive to heat recovery, and therefore, can be used as a part of the heat recovery system.

[0053] If the hot air from other temperature sections is drawn back, there are two situations: 1) the temperature is higher than the temperature section, and the guide vane 13 is easily deformed due to the different heating conditions on the inside and outside of the guide vane 13; 2) the temperature is lower than the temperature section, and then the dynamic pressure head of the air outlet pipe 11 is higher than the hot air in the temperature section, which will inevitably increase the power of the fan 3 and cause more energy consumption. The design of the present invention reduces the influence of the temperature difference on the guide vane 13, including strength and structure, etc., from which section the hot air is drawn back to the corresponding temperature section.

[0054] In addition, since the steel curtain layer 10 is in direct contact with the surface of the sintered ore 15, dust will be generated during the movement. The guide plate 13 makes the air outlet pipe 11 shrink, especially when there is no air, which can prevent dust from entering the air outlet pipe 11 to a certain extent.

[0055] The guide plate 13 tilted from top to bottom has an inclination angle of 60°. A large number of tests have shown that at this angle, the hot air ejected from the air outlet gap has a flow rate that meets the design requirements and can reduce the impact of the hot air.

[0056] In this embodiment, the material of the guide plate 13 is the same as or similar to that of the air outlet pipe 11 . Such a design can ensure that the service life of the guide plate 13 is equivalent to that of the air outlet pipe 11 .

[0057] Furthermore, it should be emphasized that Figure 4As shown, the cross section of the guide plate 13 is an arc-shaped depression, which not only has a strong resistance to thermal deformation, but also the distance between the two sides of the guide plate 13 and the outlet pipe 11 is close, and the distance between the middle and the outlet pipe 11 is far, so that the wind speed on both sides of the outlet gap 14 is fast, and the wind speed in the middle is slow. After a large number of tests, it was found that the width of the outlet on both sides is more than 1.6 times the width of the slit, and the width of the outlet in the middle is more than 1 times the width of the slit, so as to ensure that the speed of the gas (hot air) flowing out of the outlet is sufficient, which can make the air sealing effect better.

[0058] The design of the arc surface makes the surface of the guide plate smooth, and the hot air is ejected with little resistance along the surface of the guide plate, and the purpose of rapid ejection is achieved by controlling the flow rate of the variable diameter.

[0059] In addition, the cross-section of the guide plate 13 is a trapezoidal depression, which is relatively simple to manufacture. However, there are sharp corners in the guide plate 13. Under heating conditions (the jetted hot air is drawn from the chimney, and the temperature is about 100-200°C), due to the stress concentration at the sharp corners of the metal material, cracking is likely to occur once it expands due to heat.

[0060] In this embodiment, the guide plate 13 is welded and arranged in the air outlet 11, and the bottom end of the guide plate 13 and the air outlet 11 can be sealed or open. However, what surprised the inventor is that in actual use, the bottom end of the guide plate 13 and the air outlet 11 are open, which, on the one hand, facilitates the fixation of the air outlet 11 and the partition 12, and on the other hand, since the hot air goes upward, there is a certain difference in the hot air flow rate on both sides of the partition 12, and the air outlet 11 and the partition 12 are fixed, and the end of the partition 12 will be deformed to a certain extent. In this regard, the above-mentioned open design can provide space for the deformation of the partition 12 to avoid. If it is sealed or semi-blocked, the deformation of the partition 12 will squeeze the air outlet 11, thereby causing the air outlet 11 to be twisted.

[0061] In this embodiment, combined with Figure 1 As shown, the air-sealed pressure regulating unit also includes an air supply component capable of leading out the hot air from the 4# chimney 1, which includes at least one induced draft pipe 5 (circular cross-sectional shape) and a fan 3 placed on the induced draft pipe 5; the outlet of the induced draft pipe 5 and the inlet of the air outlet pipe 11 can be connected by flanges or by using iron sheets designed to extend around their inlet and outlet and screwed on with bolts 8.

[0062] like Figure 2 and Figure 3As shown, the air-tight pressure regulating unit also includes a hot air guide component connected to the air duct 5, which includes at least one bellows 6. The bellows 6 is arranged in the vertical direction of the air duct 5, and the bellows 6 is designed as a rectangular bellows 6; the bellows 6 is built with a truncated cone-shaped guide plate 7 to make the air supply with uneven flow rate and pressure more stable, and directly enter the air outlet 11 through the truncated cone-shaped guide plate 7, so as to reduce the eddy loss of the hot air and provide protection for the air-tight seal. Therefore, the hot air is collected and evenly guided at the bellows 6. The upper and lower ends of the truncated cone-shaped guide plate 7 are respectively fixed to the middle position of the bellows 6 and the inlet position of the air outlet duct 11 by welding, as shown in FIG. Figure 6 and Figure 7 shown.

[0063] Considering the maintenance of the entire flexible composite sealing device, such as Figure 1 As shown, at least one valve is arranged on the induced draft duct 5. Preferably, a first valve 2 and a second valve 4 are arranged on the induced draft duct 5. On the one hand, the air supply volume can be controlled. On the other hand, the fan 3, the induced draft duct 5, the bellows 6, the guide plate 13 and the air outlet duct 11 can be maintained by adjusting the two valves. The two valves can be electromagnetic valves, manual valves, etc.

[0064] Example 2

[0065] In order to achieve the purpose of the present invention, the present embodiment provides another structure, in which the above-mentioned air outlet pipe 11 is designed to be larger at the top and smaller at the bottom, and has a flat head (the distance from the air outlet pipe 11 on both sides is close, and the distance from the air outlet pipe 11 in the middle is far), which also enables the air outlet pipe 11 to spray hot air to both sides of the lower end of the steel curtain layer 10.

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A flexible composite sealing device, comprising at least one flexible isolating body sealing pressure regulating unit arranged along the moving direction of a trolley (17) of a sintering ring cooler, wherein the flexible isolating body sealing pressure regulating unit comprises a steel wire curtain layer (10) capable of falling to the surface of a sintered ore (15) by gravity and a fixing member and a connecting member for connecting the steel wire curtain layer (10) to the inner side of a smoke hood (16); characterized in that: It also includes an air-tight sealing and pressure regulating unit that matches the flexible isolation body sealing and pressure regulating unit, and the air-tight sealing and pressure regulating unit can spray hot air to both sides of the lower end of the steel wire curtain layer (10), so that an air-tight seal is formed between the two sides of the steel wire curtain layer (10) and the trolley (17).

2. The flexible composite sealing device according to claim 1, characterized in that: The airtight sealed pressure regulating unit comprises a lead-out component for leading out hot air from a chimney (1), the lead-out component comprising an air outlet pipe (11) connected to a partition (12), a guide plate (13) arranged obliquely from top to bottom is arranged inside the air outlet pipe (11), the guide plate (13) is recessed toward the inclined side and extends to the end face of the air outlet pipe (11), so that an air outlet gap (14) is formed between the pipe mouth of the air outlet pipe (11) and the guide plate (13), the air outlet gap (14) is located above the surface of the sintered ore (15), and can spray hot air to both sides of the steel curtain layer (10).

3. The flexible composite sealing device according to claim 2, characterized in that: The cross section of the guide plate (13) is an arc-shaped depression or a trapezoidal depression, so that the wind speed on both sides of the air outlet gap (14) is fast and the wind speed in the middle is slow.

4. The flexible composite sealing device according to claim 3, characterized in that: The airtight sealed pressure regulating unit also includes an air supply component capable of guiding hot air out of the chimney (1), which includes at least one air duct (5) and a fan (3) disposed on the air duct (5).

5. The flexible composite sealing device according to claim 4, characterized in that: The air-tight sealed pressure regulating unit also includes a hot air guide component connected to the air duct (5), which includes at least one wind box (6), and the wind box (6) is equipped with a truncated cone-shaped guide plate (7) to achieve hot air collection and uniform guidance at the wind box (6).

6. The flexible composite sealing device according to any one of claims 1 to 5, characterized in that: At least one valve is arranged on the air induced pipe (5), and preferably, a first valve (2) and a second valve (4) are arranged on the air induced pipe (5).

7. The flexible composite sealing device according to claim 6, characterized in that: The steel wire curtain layer (10) is designed to be composed of a steel wire layer (10-1), a heat insulating material (10-2) and a steel wire layer (10-1), and the inner and outer steel wire layers (10-1) are capable of fixing the heat insulating material (10-2) inside.

8. The flexible composite sealing device according to claim 7, characterized in that: The heat insulating material (10-2) fixed by the steel wire layers (10-1) on the inner and outer sides is made of plastic high temperature resistant plastic, so that it is completely spread inside the steel wire layers (10-1) on the inner and outer sides.

9. A sintering ring cooler, comprising a trolley (17) and a fume hood (16), wherein the fume hood (16) is provided with a partition (12) for separating different temperature sections inside; characterized in that: It also includes the flexible composite sealing device according to any one of claims 1-8.

10. The sintering ring cooler according to claim 9, characterized in that: The air outlet pipe (11) is fixed to the outer side of the partition plate (12) by welding.

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