Waste heat recovery device and method for high-temperature trolley of sintering machine

Abstract

The invention belongs to the technical field of sintering equipment, and discloses a sintering machine high-temperature trolley waste heat recovery device and method.The device comprises a circulating conveying mechanism and a heat recovery mechanism, the circulating conveying mechanism comprises a circulating conveying line connected end to end, the circulating conveying line comprises a heating section and a recovery section, and a trolley is arranged on the circulating conveying line; a driving assembly is arranged on the circulating conveying line to drive the trolley to circularly move between the heating section and the recycling section; the heat recovery mechanism comprises a heat preservation cover arranged on one side of the heating section in a covering mode and a sealing assembly arranged on one side of the recovery section, a heating cavity is formed in the side, facing the heating section, of the heat preservation cover, and the sealing assembly comprises a first sealing component and a second sealing component which cover the two ends of the recovery section correspondingly. A recovery cavity allowing the recovery section and the trolley to penetrate through is formed between the first sealing component and the second sealing component, and the recovery cavity communicates with the heating cavity through an air guide pipeline. Waste heat of the trolley can be recycled, the operation environment is improved, and the quality of sintering operation is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering equipment, and in particular to a device and method for recovering waste heat from a high-temperature trolley of a sintering machine. Background Art

[0002] In the steel production process, sintering is one of the important links. During the operation of the sintering machine, the temperature of the trolley beam and the grate bars gradually increases. When the trolley completes the unloading of sintered materials and waits for secondary use, the temperature of the trolley cools down naturally. The heat of the trolley will be dissipated into the surrounding environment, causing the working environment temperature to rise, resulting in the workers' working environment temperature to rise, causing thermal pollution to the working environment, and the dissipated heat is not utilized, resulting in a waste of resources.

[0003] In order to solve the problem of heat recovery, the existing technology uses a method of guiding the flue gas after cooling the sintered materials in the ring cooler to the sintering machine material surface through a pipe to participate in the sintering process. There is also a method of guiding the flue gas after the waste heat of the ring cooler is used to generate electricity to the sintering machine material surface through a pipe to participate in the sintering process. The disadvantage of the above two technologies is that in the process of cooling the high-temperature sintering materials in the ring cooler, the sintering materials contain more fuel, and the fuel will continue to burn and consume oxygen, resulting in the high-temperature flue gas introduced into the sintering machine. The oxygen content is lower than that of air, which is not conducive to the combustion reaction during the sintering process in the sintering machine, reduces the combustion speed and combustion temperature, and thus affects the normal sintering operation. Summary of the invention

[0004] The purpose of the present invention is to provide a sintering machine high-temperature trolley waste heat recovery device and method, so as to realize the waste heat recovery and reuse of the trolley, which is beneficial to improve the working environment of the operators, and can also avoid the influence of the recovered high-temperature flue gas on the sintering process, thereby ensuring the quality of the sintering operation.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Provided is a sintering machine high-temperature trolley waste heat recovery device, comprising a circulating conveying mechanism and a heat recovery mechanism, wherein the circulating conveying mechanism comprises a circulating conveying line connected end to end, wherein the circulating conveying line comprises a heating section and a recovery section, and the trolley is arranged on the circulating conveying line, and a driving component is arranged on the circulating conveying line to drive the trolley to circulate between the heating section and the recovery section;

[0007] The heat recovery mechanism includes a heat preservation cover arranged on one side of the heating section and a sealing assembly arranged on one side of the recovery section. The heat preservation cover is provided with a heating chamber on the side facing the heating section. The sealing assembly includes a first sealing component and a second sealing component respectively provided at both ends of the recovery section. A recovery chamber for the recovery section and the trolley to pass through is provided between the first sealing component and the second sealing component. The recovery chamber is connected to the heating chamber through an air duct.

[0008] In one of the embodiments, a slide rail is provided on the circulating conveying line, and the trolley includes a beam, and rollers and grate bars respectively arranged on both sides of the beam, pulleys for sliding connection with the slide rail are respectively provided at both ends of the roller along the axial direction, and guardrails are respectively provided on both sides of the grate bar along the moving direction, and a placement cavity for placing sintered materials is formed between the grate bar and the guardrails on both sides.

[0009] In one embodiment, the sealing assembly includes a first end and a second end arranged in sequence along the movement direction of the trolley, the first sealing component is provided with a first seal at the first end, the second sealing component is provided with a second seal at the first end, the first seal and the second seal are respectively abutted against the trolley, the first seal and the second seal are spaced apart to form an opening for only the trolley to pass through; the second end is provided with a vent.

[0010] In one embodiment, the first sealing component is arranged on the side of the trolley where the guardrail is provided, and the first sealing component includes a first smoke hood, and the first sealing components are respectively arranged at both ends of the first smoke hood, and the first sealing components on both sides are respectively in contact with the inner side walls of the guardrail on both sides.

[0011] In one of the embodiments, the second sealing component is arranged on the side of the vehicle beam away from the placement cavity, and the second sealing component includes a second smoke hood. The second smoke hood is respectively provided with the second sealing parts at both ends along the movement direction of the trolley, and the second sealing parts on both sides are respectively abutted against the side of the vehicle beam away from the placement cavity.

[0012] In one embodiment, the second smoke hood is provided with an air guide port, the air guide port is communicated with the air guide duct, and the air guide port is arranged adjacent to the first end.

[0013] In one embodiment, the first sealing component is provided with a plurality of first baffles in a direction toward the trolley, and the second sealing component is provided with a plurality of second baffles in a direction toward the trolley, and the first baffles and the second baffles are arranged alternately and spaced apart from each other.

[0014] In one of the embodiments, the sintering machine high-temperature trolley waste heat recovery device further includes a wind power component, and the wind power component is connected to the air guide duct to drive the gas in the recovery chamber to move toward the heating chamber.

[0015] In one of the embodiments, an exhaust duct is provided on a side of the heating section away from the heat-insulating cover, one end of the exhaust duct is communicated with the heating chamber, and the other end of the exhaust duct is connected to an external induced draft fan.

[0016] On the other hand, a method for recovering waste heat from a high-temperature trolley of a sintering machine is provided, and a device for recovering waste heat from a high-temperature trolley of a sintering machine as described above is provided, comprising the following steps:

[0017] Arrange the circulating conveying line connected end to end, and place the trolley on the circulating conveying line;

[0018] A driving assembly is arranged on the circulating conveying route to drive the trolley to circulate between the heating section and the recovery section of the circulating conveying route;

[0019] A sealing assembly is provided on the recovery section, and the first sealing component and the second sealing component are respectively provided on both ends of the recovery section to form a recovery cavity for the trolley to pass through;

[0020] The heat preservation cover is provided on the heating section, and the heating chamber of the heat preservation cover is arranged toward the trolley on the heating section;

[0021] The heating chamber of the heat-insulating cover is connected to the recovery chamber of the sealing assembly by the air guide duct, so that the waste heat of the trolley collected in the recovery chamber is introduced into the heating chamber, transferred to the trolley through the heating chamber and heats the sintering material on the trolley.

[0022] Beneficial effects of the present invention:

[0023] A waste heat recovery device for a high-temperature trolley of a sintering machine of the present invention is provided with a circulating conveying route so that the trolley can circulate in the heating section and the recovery section of the circulating conveying route under the drive of a driving component. In actual operation, before the trolley enters the heating section, the sintering material is loaded onto the trolley through a loading mechanism, and then the trolley loaded with the sintering material enters the heating section for heating and sintering operations. After the sintering material is completed in the heating section with the trolley, the unloading operation of the sintering material is completed before entering the recovery section. Although the empty trolley enters the recovery section, the waste heat of the trolley is recovered. During the movement of the trolley that has completed the waste heat recovery from the recovery section toward the heating section, the sintering material is loaded onto the trolley through the loading mechanism, thereby performing a cyclic reciprocating sintering operation.

[0024] Furthermore, a heat recovery mechanism is provided to recover the waste heat of the trolley on the recovery section and introduce it into the heating section, thereby improving the sintering temperature and sintering efficiency of the sintering material on the trolley in the heating section. Specifically, the air guide duct connects the heating chamber of the insulation cover with the recovery chamber of the sealing assembly, so that the waste heat of the trolley collected in the recovery chamber is introduced into the heating chamber, transferred to the trolley through the heating chamber and the sintering material on the trolley is heated, thereby realizing the recovery and reuse of the waste heat of the trolley, improving the air temperature during the sintering process of the heating section, and helping to reduce fuel consumption. Moreover, it can also avoid the situation where the ambient temperature rises during the natural cooling process of the unloaded trolley, which is beneficial to improving the working environment of the operators. In addition, the high-temperature flue gas in this device is obtained by recovering the heat on the trolley, and the recovery process does not involve combustion reaction, so that the oxygen content in the flue gas will not be reduced, which is beneficial to avoid the impact of the recovered high-temperature flue gas on the sintering process and ensure the quality of the sintering operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a waste heat recovery device for a high-temperature trolley of a sintering machine in one embodiment;

[0026] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0027] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the middle BB;

[0028] Figure 4 yes Figure 3 The enlarged structural diagram of the middle C part;

[0029] Figure 5 Schematic diagram of the structure of a sealing assembly in one of the embodiments.

[0030] In the figure:

[0031] 100, circulation conveying line; 110, heating section; 120, recovery section; 130, slide rail; 200, heat recovery mechanism; 210, heat preservation cover; 211, heating chamber; 220, sealing assembly; 220a, first end; 220b, second end; 221, first sealing member; 2211, first sealing member; 2212, first smoke cover; 2213, first baffle; 2214, first support column; 222, second sealing member; 2221, second sealing member Components; 2222, second smoke hood; 2223, air guide port; 2224, second baffle; 2225, second support column; 230, recovery chamber; 240, vent; 300, trolley; 310, car beam; 320, roller; 321, pulley; 330, grate bar; 340, guardrail; 350, slide plate; 360, placement chamber; 400, air guide duct; 510, driving star wheel; 600, sintering material; 700, exhaust duct; 800, feeding mechanism. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] like Figures 1 to 5 As shown, a sintering machine high-temperature trolley waste heat recovery device of this embodiment includes a circulating conveying mechanism and a heat recovery mechanism 200, the circulating conveying mechanism includes a circulating conveying line 100 connected end to end, the circulating conveying line 100 includes a heating section 110 and a recovery section 120, a trolley 300 is arranged on the circulating conveying line 100, and a driving component is arranged on the circulating conveying line to drive the trolley 300 to circulate between the heating section 110 and the recovery section 120; the heat recovery mechanism 200 includes a cover arranged on the heating section 110 0, and a sealing assembly 220 arranged on one side of the recovery section 120. A heating chamber 211 is provided on the side of the heat preservation cover 210 facing the heating section 110. The sealing assembly 220 includes a first sealing component 221 and a second sealing component 222 respectively covered at both ends of the recovery section 120. A recovery chamber 230 is provided between the first sealing component 221 and the second sealing component 222 for the recovery section 120 and the trolley 300 to pass through. The recovery chamber 230 is connected to the heating chamber 211 through an air duct 400.

[0037] In this embodiment, by setting a circular conveying route, the trolley 300 can be driven by the driving assembly to circulate in the heating section 110 and the recovery section 120 of the circular conveying route. In actual operation, before the trolley 300 enters the heating section 110, the sintering material 600 is loaded onto the trolley 300 through the loading mechanism 800, and then the trolley 300 loaded with the sintering material 600 enters the heating section 110 for heating and sintering. After the sintering material 600 is sintered with the trolley 300 in the heating section 110, the unloading operation of the sintering material 600 is completed before entering the recovery section 120. Although the empty trolley 300 enters the recovery section 120 to recover the waste heat of the trolley 300, the trolley 300 that has completed the waste heat recovery moves from the recovery section 120 toward the heating section 110, and then the sintering material 600 is loaded onto the trolley 300 through the loading mechanism 800, so as to perform a cyclic reciprocating sintering operation. In this embodiment, the loading and unloading operations of the sintering material 600 are conventional prior art and will not be described in detail herein.

[0038] Furthermore, a heat recovery mechanism 200 is provided to recover the waste heat of the trolley 300 on the recovery section 120 and introduce it into the heating section 110, thereby improving the sintering temperature and sintering efficiency of the sintering material 600 on the trolley 300 in the heating section 110. Specifically, the air guide duct 400 connects the heating chamber 211 of the heat preservation cover 210 with the recovery chamber 230 of the sealing assembly 220, so that the waste heat of the trolley 300 collected in the recovery chamber 230 is introduced into the heating chamber 211, and is transferred to the trolley 300 through the heating chamber 211 to heat the sintering material 600 on the trolley 300, thereby realizing the recovery and reuse of the waste heat of the trolley 300, improving the air temperature during the sintering process of the heating section 110, and helping to reduce fuel consumption. Moreover, it can also avoid the situation where the ambient temperature rises during the natural cooling process of the unloaded trolley 300, which is conducive to improving the working environment of the operators. In addition, the high-temperature flue gas in this device is obtained by recovering the heat on the trolley 300. The recovery process does not involve a combustion reaction, thereby not reducing the oxygen content in the flue gas. This is beneficial to avoid the impact of the recovered high-temperature flue gas on the sintering process and ensure the quality of the sintering operation.

[0039] In one embodiment, a slide rail 130 is provided on the circulating conveying line 100, and the slide rail 130 is fixedly installed in the factory building. The trolley 300 includes a beam 310, and rollers 320 and grate bars 330 respectively arranged on both sides of the beam 310. The rollers 320 are respectively provided with pulleys 321 for sliding connection with the slide rail 130 at both ends along the axial direction, and the trolley 300 moves on the slide rail 130 through the pulleys 321. Specifically, the driving assembly includes a driving star wheel 510, which is connected to the trolley 300 through the driving star wheel 510 to drive the trolley 300 to slide on the slide rail 130. Fences 340 are respectively provided on both sides of the grate bars 330 along the moving direction, and a placement cavity 360 for placing the sintering material 600 is formed between the grate bars 330 and the fences 340 on both sides.

[0040] Before the trolley 300 moves to the heating section 110, the sintering material 600 is loaded into the placement chamber 360 by the loading mechanism 800, and the sintering material 600 enters the heating section 110 for heating under the transportation of the trolley 300. After the sintering material 600 is loaded on the trolley 300 and heated in the heating section 110, the trolley 300 loaded with the sintering material 600 moves from the heating section 110 toward the recovery section 120, and the unloading operation of the sintering material 600 is completed by the unloading mechanism (not shown), and then the empty high-temperature trolley 300 enters the recovery section 120 for preheating and recovery operation.

[0041] In one embodiment, the sealing assembly 220 includes a first end 220a and a second end 220b which are sequentially arranged along the movement direction of the trolley 300, the first sealing component 221 is located at the first end 220a and is provided with a first seal 2211, the second sealing component 222 is located at the first end 220a and is provided with a second seal 2221, the first seal 2211 and the second seal 2221 are respectively abutted against the trolley 300, and the first seal 2211 and the second seal 2221 are spaced apart to form an opening only for the trolley 300 to pass through, so as to prevent cold air from entering the recovery chamber 230 from the first end 220a, causing the temperature of the trolley 300 that has just entered the recovery chamber 230 to drop too quickly, causing the temperature of the high-temperature flue gas collected in the recovery chamber 230 to decrease, thereby affecting the waste heat recovery efficiency of the trolley 300.

[0042] In one embodiment, the first sealing member 221 is disposed on the side of the trolley 300 provided with the guardrail 340, and the first sealing member 221 includes a first smoke hood 2212, and first sealing members 2211 are respectively disposed at both ends of the first smoke hood 2212, and the first sealing members 2211 on both sides are respectively abutted against the inner side walls of the guardrails 340 on both sides. The placement chamber 360 of the trolley 300 is sealed by the first smoke hood 2212 and the first sealing member 2211, that is, the grate bar 330 in the placement chamber 360 is sealed in the recovery chamber 230, so as to recover the waste heat on the grate bar 330, and at the same time prevent the heat on the grate bar 330 from being dissipated outside the recovery chamber 230, thereby improving the waste heat recovery efficiency.

[0043] In actual operation, the first smoke hood 2212 is installed on the factory building through the first support column 2214, and the first support column 2214 is used to support and fix the first smoke hood 2212. Further, the first support column 2214 of different heights can be used according to the specifications of the specific trolley 300 to ensure that the first smoke hood 2212 can effectively seal the parts of the beam 310 and the grate bar 330 with higher temperature on the trolley 300 in the recovery chamber 230, so as to ensure that the heat on the trolley 300 is fully recycled and utilized, which is conducive to improving the efficiency of waste heat recovery of the trolley 300, and at the same time, avoid excessive exposure of the parts of the beam 310 and the grate bar 330 with higher temperature on the trolley 300 to the working environment of the factory building, heating the working environment of the factory building and causing the working environment temperature to rise.

[0044] In one embodiment, the second sealing member 222 is disposed on the side of the beam 310 away from the placement chamber 360, and the second sealing member 222 includes a second smoke hood 2222, and the second seals 2221 are respectively disposed at both ends of the second smoke hood 2222 along the movement direction of the trolley 300, and the second seals 2221 on both sides are respectively abutted against the side of the beam 310 away from the placement chamber 360. The beam 310 is sealed in the recovery chamber 230 by the second smoke hood 2222 and the second seal 2221, and further, the beam 310 and the grate bar 330 are sealed in the recovery chamber 230 in cooperation with the first smoke hood 2212 and the first seal 2211, so as to improve the heat recovery efficiency on the beam 310 and the grate bar 330.

[0045] In actual operation, the second smoke hood 2222 is installed on the factory building through the second support column 2225, and the second support column 2225 is used to support and fix the second smoke hood 2222. Further, the second support columns 2225 of different heights can be used according to the specifications of the specific trolley 300 to ensure that the second smoke hood 2222 can effectively seal the parts of the beam 310 and the grate bar 330 on the trolley 300 with higher temperatures in the recovery chamber 230 to ensure that the heat on the trolley 300 is fully recovered and utilized, which is conducive to improving the efficiency of waste heat recovery of the trolley 300, and at the same time, avoid excessive exposure of the parts of the beam 310 and the grate bar 330 on the trolley 300 with higher temperatures to the working environment of the factory building, heating the working environment of the factory building and causing the working environment temperature to rise.

[0046] Specifically, in actual operation, the first seal 2211 and the second seal 2221 are configured as sealing strips made of rubber material to ensure good contact between the sealing strip and the guardrail 340, thereby ensuring the sealing performance of the first seal 2211. Of course, in other embodiments, the first seal 2211 of other materials or structures may also be used, as long as the above-mentioned sealing effect can be achieved, and such designs all belong to the protection scope of the present invention.

[0047] Furthermore, an air outlet 2223 is provided on the second smoke hood 2222, and the air outlet 2223 is connected to the air duct 400. The air outlet 2223 is arranged adjacent to the first end 220a, so that the waste heat on the trolley 300 can be quickly recovered after the trolley 300 enters the recovery chamber 230 from the first end 220a, thereby avoiding excessive heat loss on the trolley 300 and improving the efficiency of waste heat recovery.

[0048] In addition, the second end 220b is provided with a vent 240, which is convenient for external air to enter from the second end 220b and perform heat exchange with the trolley 300. The trolley 300 heats the air to obtain high-temperature flue gas, and inputs the high-temperature flue gas into the heating chamber 211 through the air guide duct 400, so as to realize the waste heat recovery of the trolley 300. Specifically, during the movement of the trolley 300 from the first end 220a to the second end 220b in the recovery chamber 230, the trolley 300 continuously inhales external cold air from the second end 220b. When the trolley 300 leaves the recovery chamber 230 at the second end 220b, the cooling is basically completed, and the cold air inhaled from the second end 220b is continuously heat exchanged with the trolley 300 to become high-temperature flue gas, and is discharged from the air guide port 2223 adjacent to the first end 220a, and is introduced into the heating chamber 211 through the air guide duct 400.

[0049] Among them, a slide plate 350 is provided on the side where the vehicle beam 310 abuts against the second sealing member 2221, and the vehicle beam 310 abuts against the second sealing member 2221 through the slide plate 350. The setting of the slide plate 350 can reduce the friction between the trolley 300 and the second sealing strip, thereby improving the smoothness of the operation of the trolley 300. Furthermore, the slide plate 350 and the vehicle beam 310 are detachably connected to facilitate the disassembly, maintenance and replacement of the slide plate 350, so as to ensure the tightness of the abutment between the slide plate 350 and the second sealing member 2221 during the operation, thereby ensuring the sealing of the entire recovery chamber 230, avoiding the heat dissipation in the recovery chamber 230, and facilitating the improvement of the overall heat recovery efficiency.

[0050] In one embodiment, the first sealing component 221 is provided with a plurality of first baffles 2213 toward the direction of the trolley 300, and the second sealing component 222 is provided with a plurality of second baffles 2224 toward the direction of the trolley 300. The first baffles 2213 and the second baffles 2224 are arranged at intervals and staggered with each other to block the horizontal flow of air, so that the air flows in a wave shape around the first baffles 2213 and the second baffles 2224, and passes through the two sides of the beam 310 and the grate bar 330 of the trolley 300 for many times, thereby improving the heat exchange efficiency between the beam 310 and the grate bar 330 and the air, thereby effectively cooling the beam 310 and the grate bar 330, taking away more heat, making the waste heat recovery more thorough and efficient, and also enabling the trolley 300 to be effectively cooled after passing through the recovery section 120, so as to facilitate recycling.

[0051] In one of the embodiments, the waste heat recovery device of the high-temperature trolley of the sintering machine also includes a wind power component (not shown), which is connected to the air duct 400 to drive the gas in the recovery chamber 230 to move toward the heating chamber 211. The wind power component accelerates the speed of the high-temperature flue gas in the recovery chamber 230 moving toward the heating chamber 211, thereby increasing the speed of heat recovery. In actual operation, the wind power component can adopt equipment such as an exhaust fan or a blower, and the high-temperature flue gas in the recovery chamber 230 is drawn into the heating chamber 211 through the air duct 400 by the exhaust fan. The design and installation of the wind power component adopt the design and installation scheme of wind power equipment in the conventional prior art, which will not be repeated here.

[0052] In one of the embodiments, an exhaust duct 700 is provided on the side of the heating section 110 away from the heat preservation cover 210, one end of the exhaust duct 700 is connected to the heating chamber 211, and the other end of the exhaust duct 700 is connected to an external induced draft fan, and the smoke is discharged into the factory through the external induced draft fan (not shown), or introduced into other external equipment for further treatment, so as to avoid excess smoke remaining in the factory and affecting the working environment in the factory.

[0053] On the other hand, a method for recovering waste heat from a high-temperature trolley of a sintering machine is provided, and a device for recovering waste heat from a high-temperature trolley of a sintering machine as described above is provided, comprising the following steps:

[0054] Arrange a circulating conveying line 100 connected end to end, and place the trolley 300 on the circulating conveying line, so that the trolley 300 can be recycled on the circulating conveying line, reducing the operation of carrying the trolley 300, so that the entire sintering operation is smoother;

[0055] A driving assembly is provided on the circulating conveying route to drive the trolley 300 to circulate between the heating section 110 and the recovery section 120 of the circulating conveying route. Specifically, when the trolley 300 moves from the recovery section 120 to the heating section 110, the sintering material 600 is loaded onto the trolley 300 through the loading mechanism 800. When the trolley 300 loaded with the sintering material 600 passes through the heating section 110 toward the recovery section 120, the sintering material 600 is unloaded through the unloading mechanism, and the empty trolley 300 enters the recovery section 120 for waste heat recovery.

[0056] A sealing assembly 220 is provided on the recovery section 120, and a first sealing member 221 and a second sealing member 222 are respectively provided on both ends of the recovery section 120 to form a recovery chamber 230 for the trolley 300 to pass through;

[0057] A heat preservation cover 210 is provided on the heating section 110, and a heating chamber 211 of the heat preservation cover 210 is arranged toward the trolley 300 on the heating section 110;

[0058] The heating chamber 211 of the heat preservation cover 210 is connected to the recovery chamber 230 of the sealing assembly 220 by using an air guide duct 400, so that the waste heat of the trolley 300 collected in the recovery chamber 230 is introduced into the heating chamber 211, and is transferred to the trolley 300 through the heating chamber 211 to heat the sintering material 600 on the trolley 300, thereby increasing the temperature of the air in the inhaled sintering process, which is beneficial to reducing fuel consumption. Moreover, it can also avoid the situation where the ambient temperature rises during the natural cooling process of the unloaded trolley 300, which is beneficial to improving the working environment of the operators. In addition, the high-temperature flue gas in the present device is obtained by recovering the heat on the trolley 300. The recovery process does not involve a combustion reaction, so that the oxygen content in the flue gas will not be reduced, which is beneficial to avoid the influence of the recovered high-temperature flue gas on the sintering process and ensure the quality of the sintering operation.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A sintering machine high temperature trolley waste heat recovery device, characterized in that: include: A circulating conveying mechanism, the circulating conveying mechanism comprising a circulating conveying line (100) connected end to end, the circulating conveying line (100) comprising a heating section (110) and a recovery section (120), a trolley (300) being arranged on the circulating conveying line (100), and a driving component being arranged on the circulating conveying line to drive the trolley (300) to circulate between the heating section (110) and the recovery section (120); A heat recovery mechanism (200), the heat recovery mechanism (200) comprising a heat preservation cover (210) arranged on one side of the heating section (110), and a sealing component (220) arranged on one side of the recovery section (120); a heating chamber (211) is provided on the side of the heat preservation cover (210) facing the heating section (110); the sealing component (220) comprises a first sealing component (221) and a second sealing component (222) respectively arranged on both ends of the recovery section (120); a recovery chamber (230) is provided between the first sealing component (221) and the second sealing component (222) for the recovery section (120) and the trolley (300) to pass through; the recovery chamber (230) is connected to the heating chamber (211) via an air guide duct (400).

2. The sintering machine high temperature trolley waste heat recovery device according to claim 1, characterized in that: A slide rail (130) is arranged on the circulating conveying line (100), and the trolley (300) includes a beam (310), and rollers (320) and grate bars (330) respectively arranged on both sides of the beam (310), pulleys (321) for sliding connection with the slide rail (130) are respectively arranged at both ends of the roller (320) along the axial direction, and the grate bars (330) are respectively arranged on both sides along the moving direction. A placement cavity (360) for placing sintered materials (600) is formed between the grate bars (330) and the grate bars (340) on both sides.

3. The sintering machine high temperature trolley waste heat recovery device according to claim 2, characterized in that: The sealing assembly (220) comprises a first end (220a) and a second end (220b) which are sequentially arranged along the moving direction of the trolley (300); the first sealing member (221) is located at the first end (220a) and is provided with a first sealing member (2211); the second sealing member (222) is located at the first end (220a) and is provided with a second sealing member (2221); the first sealing member (2211) and the second sealing member (2221) are respectively in contact with the trolley (300); the first sealing member (2211) and the second sealing member (2221) are spaced apart to form an opening only for the trolley (300) to pass through; the second end (220b) is provided with a vent (240).

4. The sintering machine high temperature trolley waste heat recovery device according to claim 3, characterized in that: The first sealing component (221) is arranged on a side of the trolley (300) where the baffle (340) is provided, and the first sealing component (221) includes a first smoke hood (2212), and the first sealing components (2211) are respectively provided at both ends of the first smoke hood (2212), and the first sealing components (2211) on both sides are respectively abutted against the inner side walls of the baffles (340) on both sides.

5. The sintering machine high temperature trolley waste heat recovery device according to claim 3, characterized in that: The second sealing component (222) is arranged on a side of the vehicle beam (310) away from the placement cavity (360), and the second sealing component (222) includes a second smoke hood (2222). The second smoke hood (2222) is respectively provided with the second sealing components (2221) at both ends along the movement direction of the trolley (300), and the second sealing components (2221) on both sides are respectively abutted against a side of the vehicle beam (310) away from the placement cavity (360).

6. The sintering machine high temperature trolley waste heat recovery device according to claim 5, characterized in that: The second smoke hood (2222) is provided with an air guide port (2223), the air guide port (2223) is in communication with the air guide duct (400), and the air guide port (2223) is arranged adjacent to the first end (220a).

7. The sintering machine high temperature trolley waste heat recovery device according to any one of claims 1 to 6, characterized in that: The first sealing component (221) is provided with a plurality of first baffles (2213) in the direction of the trolley (300), and the second sealing component (222) is provided with a plurality of second baffles (2224) in the direction of the trolley (300), and the first baffles (2213) and the second baffles (2224) are arranged in an alternating manner.

8. The sintering machine high temperature trolley waste heat recovery device according to any one of claims 1 to 6, characterized in that: It also comprises a wind force component, which is connected to the air guide duct (400) to drive the gas in the recovery chamber (230) to move towards the heating chamber (211).

9. The sintering machine high temperature trolley waste heat recovery device according to any one of claims 1 to 6, characterized in that: An exhaust duct (700) is provided on a side of the heating section (110) away from the heat-insulating cover (210); one end of the exhaust duct (700) is in communication with the heating chamber (211), and the other end of the exhaust duct (700) is connected to an external induced draft fan.

10. A method for recovering waste heat from a high-temperature trolley of a sintering machine, characterized in that: A sintering machine high temperature trolley waste heat recovery device according to any one of claims 1 to 9 is provided, comprising the following steps: Arranging the circulating conveying line (100) connected end to end, and placing the trolley (300) on the circulating conveying line; A driving assembly is arranged on the circulating conveying route to drive the trolley (300) to circulate between the heating section (110) and the recovery section (120) of the circulating conveying route; A sealing assembly (220) is provided on the recovery section (120), and the first sealing component (221) and the second sealing component (222) are respectively provided on both ends of the recovery section (120), so as to form a recovery chamber (230) for the trolley (300) to pass through; The heat-insulating cover (210) is covered on the heating section (110), and the heating chamber (211) of the heat-insulating cover (210) is arranged toward the trolley (300) on the heating section (110); The air guide duct (400) is used to connect the heating chamber (211) of the heat-insulating cover (210) with the recovery chamber (230) of the sealing assembly (220), so that the residual heat of the trolley (300) collected in the recovery chamber (230) is introduced into the heating chamber (211), transferred to the trolley (300) through the heating chamber (211), and heats the sintering material (600) on the trolley (300).

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