scraper conveyor

Abstract

This utility model discloses a scraper conveyor, comprising: a housing having a top wall, a bottom wall, and side walls; a feed inlet on the top wall and a discharge outlet on the bottom wall; the housing extending longitudinally along a first direction; a conveying structure disposed within the housing for conveying material flowing in through the feed inlet to the discharge outlet and then out of the housing; a cooling structure including a first water-cooled pipe assembly disposed on the bottom wall, comprising multiple water-cooled pipes extending longitudinally along the first direction, the first water-cooled pipe assembly including at least one cooling water inlet and at least one cooling water outlet; and a driving device connected to the cooling water inlet via a connecting pipe for driving cooling water to enter the water-cooled pipes through the cooling water inlet, exchange heat with the housing, and then flow out through the cooling water outlet. The scraper conveyor provided by this application can effectively improve the heat exchange efficiency of water flow, thereby better meeting the conveying requirements of high-temperature materials.

Description

Technical Field

[0001] This utility model relates to the technical field of scraper conveying devices, and in particular to a scraper conveyor. Background Technology

[0002] In common material conveying processes, scraper conveyors are frequently used to transport small particles and dust. Taking metallurgy and chemical industries as examples, the materials being transported and the operating environment often have high temperatures, reaching 600℃ to 700℃. Under such conditions, scraper conveyors will be damaged after a certain period of use due to metal fatigue, high-temperature deformation, and other reasons.

[0003] In existing technologies, scraper conveyors are often cooled by installing water tanks or enclosures on the outside. However, this method relies on natural convection of water for cooling, resulting in low efficiency. Under current technology, scraper conveyors can only transport materials below 300°C, and cannot reliably meet the requirements for applications where the material and operating environment temperatures reach 600°C to 700°C.

[0004] Therefore, it is necessary to propose a scraper conveyor to solve at least one of the above problems.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the present invention provides a scraper conveyor that can effectively improve the heat exchange efficiency of water flow, thereby better meeting the conveying needs of high-temperature materials.

[0007] The specific technical solution of this utility model embodiment is as follows:

[0008] A scraper conveyor includes: a housing having opposing top and bottom walls and side walls surrounding the top and bottom walls; a feed inlet on the top wall and a discharge outlet on the bottom wall; the housing extending longitudinally along a first direction; a conveying structure disposed within the housing for conveying material flowing in through the feed inlet to the discharge outlet and then out of the housing; a cooling structure including a first water-cooled pipe assembly disposed on the bottom wall, the first water-cooled pipe assembly including a plurality of water-cooled pipes extending longitudinally along the first direction, the plurality of water-cooled pipes being connected in series and / or in parallel; the first water-cooled pipe assembly including at least one cooling water inlet and at least one cooling water outlet; in the first direction, at least one cooling water inlet is disposed near the discharge outlet, and at least one cooling water outlet is disposed away from the discharge outlet; and a driving device connected to the cooling water inlet via a connecting pipe for driving cooling water to enter the water-cooled pipes through the cooling water inlet, exchange heat with the housing, and then flow out through the cooling water outlet.

[0009] In a preferred embodiment, the water-cooling pipe is a semi-circular pipe with one side open, and the open side of the water-cooling pipe is sealed on the outer wall of the housing.

[0010] In a preferred embodiment, the water-cooling pipe is sealed and fixed to the housing by welding or the water-cooling pipe is integrally formed with the housing.

[0011] In a preferred embodiment, the scraper conveyor further includes a preheating heat exchanger, which is connected to the drive device and the cooling water inlet via the connecting pipe. The preheating heat exchanger, the drive device, and the water-cooled pipe form a cooling circulation channel through the connecting pipe. When the drive device is started, the cooling water in the preheating heat exchanger flows into the cooling water inlet through the connecting pipe, flows through the water-cooled pipe, flows out through the cooling water outlet, and then returns to the preheating heat exchanger through the connecting pipe.

[0012] In a preferred embodiment, the preheating heat exchanger is provided with a first channel for circulating cooling water and a second channel for circulating heating water. The second channel has a heating water inlet for introducing heating water and a heating water outlet for discharging heating water. The first channel has an inlet for introducing heated cooling water and an outlet for discharging cooling water after it has absorbed heat from the heating water.

[0013] In a preferred embodiment, the cooling structure further includes at least one second water-cooling pipe assembly disposed on the side wall. The second water-cooling assembly includes a plurality of water-cooling pipes extending longitudinally along the first direction. The plurality of water-cooling pipes are connected in series and / or in parallel. The second water-cooling pipe assembly is connected in series or in parallel with the first water-cooling pipe assembly.

[0014] In a preferred embodiment, the second water-cooled pipe assembly is connected in parallel with the first water-cooled pipe assembly; the second water-cooled pipe assembly includes at least one cooling water inlet and at least one cooling water outlet; in the first direction, at least one of the cooling water inlets is disposed away from the feed inlet, and at least one of the cooling water outlets is disposed away from the discharge outlet.

[0015] In a preferred embodiment, the water-cooling pipe is a D-shaped pipe, or the water-cooling pipe is a flat pipe, and the outer wall surface of the water-cooling pipe can form surface contact with the outer wall surface of the housing.

[0016] In a preferred embodiment, a plurality of water-cooled pipes are connected in series, and the ends of the plurality of water-cooled pipes are connected through a connecting portion to form a reciprocating coil.

[0017] In a preferred embodiment, a plurality of the water-cooled pipes are arranged in parallel. Along the first direction, a water distribution section is provided near the cooling water inlet, and a water collection section is provided near the cooling water outlet. The water distribution section is used to distribute the cooling water flowing in from the cooling water inlet to each water-cooled pipe, and the water collection section is used to collect the water flowing out from each water-cooled pipe and then flow it to the cooling water outlet.

[0018] In a preferred embodiment, the conveying structure includes: sprockets, which are respectively disposed at both ends of the housing along the first direction; a scraper and chain, which are connected between the two sprockets and are spaced apart from the housing; an upper chain guide rail, which is supported and fixed on the side wall of the housing to support the upper scraper and chain; and a lower chain guide rail, which is fixed on the bottom wall of the housing to support the lower scraper and chain.

[0019] The technical solution of this utility model has the following significant beneficial effects:

[0020] In this embodiment, a cooling structure is provided on the outer wall of the housing. This cooling structure includes a water-cooled pipe assembly disposed on the outer wall of the housing. The water-cooled pipe assembly includes a plurality of water-cooled pipes extending longitudinally along the longitudinal direction (first direction) of the housing. The water-cooled pipe assembly includes at least one cooling water inlet and at least one cooling water outlet. In the first direction, at least one of the cooling water inlets is disposed close to the discharge port, and at least one of the cooling water outlets is disposed away from the discharge port. In addition, the scraper conveyor is also provided with a drive device (e.g., a water pump) connected to the cooling water inlet via a connecting pipe.

[0021] During operation, cooling water is pumped into each cooling water inlet via connecting pipes. It then flows along the water-cooled pipes in the opposite direction to the ash conveying direction, moving upwards along the coils. After absorbing heat from the housing and heating up, it is discharged from the cooling water outlet. The housing, scraper, chain, and chain guide rails are heated by the high-temperature ash and flue gas during operation. This heat is carried away by the continuously circulating cooling water, maintaining the equipment at a lower operating temperature and increasing its service life. In this process, the heat from the high-temperature ash is also continuously carried away, reducing the ash temperature at the equipment outlet to below 200℃. Therefore, this equipment also serves to cool the high-temperature ash.

[0022] Overall, the water-cooling pipe assembly installed on the outer wall of the casing and the drive device connected to the water-cooling pipe assembly can effectively enhance the water cooling effect, effectively improve the working life of the scraper conveyor in high-temperature materials and high-temperature environments, meet the requirements of conveying high-temperature materials at 700℃ and below, and broaden the application range of the scraper conveyor.

[0023] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, embodiments of the present invention include many changes, modifications, and equivalents. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description

[0024] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0025] Figure 1 This is a side view of a scraper conveyor provided in the embodiments of this application;

[0026] Figure 2 This is a cross-sectional view of a scraper conveyor provided in an embodiment of this application;

[0027] Figure 3 This is a partial schematic diagram of the fit between a water-cooled pipe and a housing provided in an embodiment of this application;

[0028] Figure 4 This is one of the structural schematic diagrams of a water-cooled pipe provided in the embodiments of this application;

[0029] Figure 5 This is a second schematic diagram of the structure of a water-cooled pipe provided in the embodiments of this application;

[0030] Figure 6 This is a side view of another scraper conveyor provided in the embodiments of this application;

[0031] Figure 7 This is a cross-sectional view of yet another scraper conveyor provided in the embodiments of this application;

[0032] Figure 8 This is a side view of another scraper conveyor provided in the embodiments of this application;

[0033] Figure 9 This is a schematic diagram of the water circuit connection of a cooling structure provided in the embodiments of this application.

[0034] Reference numerals in the figures of this application:

[0035] 1. Feed inlet;

[0036] 2. Box body;

[0037] 21. Top wall;

[0038] 22. Bottom wall;

[0039] 23. First sidewall;

[0040] 24. Second sidewall;

[0041] 25. Third sidewall;

[0042] 3. Discharge port;

[0043] 4. Scraper and chain;

[0044] 5. Sprockets;

[0045] 6. Lower chain guide rail;

[0046] 7. Install the upper chain guide rail;

[0047] 8. Water-cooled pipes;

[0048] 9. Cooling water inlet;

[0049] 10. Cooling water outlet;

[0050] 11. Upper guide rail support;

[0051] 12. Connect the pipes;

[0052] 13. Drive unit;

[0053] 14. Preheating heat exchanger;

[0054] 141. Heating water inlet;

[0055] 142. Heating water outlet;

[0056] 143. Water inlet;

[0057] 144. Water outlet;

[0058] X, first direction;

[0059] Y, the second direction;

[0060] Z, Third-party orientation. Detailed Implementation

[0061] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0062] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0064] Existing technology provides a scraper conveyor that directly cools high-temperature coke powder through water flow in the bottom layer, and further cools the bottom layer and the casing through water flow in the circulating chamber, thereby achieving a certain cooling effect. However, due to the limitations of the chamber structure, this technology cannot operate under forced circulation and high pressure, posing a risk of leakage and deformation. This results in a very slow water flow rate, which restricts the heat exchange effect, limiting the scraper conveyor to materials below 300°C.

[0065] This utility model provides a scraper conveyor that can effectively improve the heat exchange efficiency of water flow, thereby better meeting the conveying needs of high-temperature materials.

[0066] Please refer to the following for comprehensive information. Figures 1 to 9 This application specification provides a scraper conveyor, which may include: a housing 2 having a top wall 21 and a bottom wall 22 opposite to each other, and a side wall surrounding the top wall 21 and the bottom wall 22; a feed inlet 1 provided on the top wall 21 and a discharge outlet 3 provided on the bottom wall 22; the housing 2 extending longitudinally along a first direction X; a conveying structure disposed in the housing 2 for conveying material flowing in through the feed inlet 1 to the discharge outlet 3 and then out of the housing 2; and a cooling structure including a first water-cooled pipe assembly disposed on the bottom wall 22. The assembly includes multiple water-cooled pipes 8 extending longitudinally along the first direction X. The multiple water-cooled pipes 8 are connected in series and / or in parallel. The first water-cooled pipe assembly includes at least one cooling water inlet 9 and at least one cooling water outlet 10. In the first direction X, at least one cooling water inlet 9 is located close to the discharge port 3, and at least one cooling water outlet 10 is located away from the discharge port 3. A driving device 13 is connected to the cooling water inlet 9 through a connecting pipe 12, and is used to drive cooling water to enter the water-cooled pipes 8 through the cooling water inlet 9, exchange heat with the housing 2, and then flow out through the cooling water outlet 10.

[0067] In this embodiment, the scraper conveyor mainly includes: a housing 2, a conveying structure disposed inside the housing 2, and a cooling structure disposed outside the housing 2.

[0068] The box 2 can be a hollow rectangular shell, although other structures are not excluded in this embodiment. This embodiment primarily uses a rectangular box 2 as an example. The box 2 has opposing top walls 21 and bottom walls 22, and side walls surrounding the top and bottom walls 21 and 22. An inlet 1 is provided on the top wall 21, and an outlet 3 is provided on the bottom wall 22. The box 2 extends longitudinally along a first direction X. In the first direction X, the side walls include opposing first side walls 23 and second side walls 24. For example, when the first direction X is left-right, the first side wall 23 can be the left side wall, and the second side wall 24 can be the right side wall.

[0069] In a second direction Y perpendicular to the first direction X, the sidewall includes a third sidewall 25 and a fourth sidewall. For example, when the second direction Y is a front-rear direction, the third sidewall 25 is the front sidewall and the fourth sidewall is the rear sidewall.

[0070] like Figure 1 As shown, when the cross-sectional dimension of the feed inlet 1 is relatively small, one of the feed inlet 1 and the discharge outlet 3 is located near the first sidewall 23, and the other is located near the second sidewall 24. Figure 6 As shown, when the cross-sectional dimension of the feed inlet 1 is relatively large, the feed inlet 1 can extend longitudinally along the first direction X. The discharge outlet 3 can be located near the second side arm.

[0071] like Figure 1 or Figure 6 As shown, a conveying structure is installed in the housing 2 to convey the material flowing in through the inlet 1 to the outlet 3 and then out of the housing 2.

[0072] Specifically, the conveying structure may include: sprockets 5, which are respectively disposed at both ends of the housing 2 along the first direction X; scraper and chain 4, which are connected between the two sprockets 5 and are spaced apart from the housing 2; upper chain guide rail 7, which is fixed to the side wall of the housing 2 by upper guide rail support 11 to support the upper scraper and chain 4; and lower chain guide rail 6, which is fixed to the bottom wall 22 of the housing 2 to support the lower scraper and chain 4.

[0073] In this embodiment, the scraper and chain 4 do not directly contact the inner wall of the housing 2. The scraper and chain 4 are spread apart by the sprocket 5, forming upper and lower sides. An upper chain guide rail 7 and a lower chain guide rail 6 are respectively provided under the scraper and chain 4 on the upper and lower sides. The lower chain guide rail 6 is welded to the bottom inner wall of the housing 2, the upper chain guide rail 7 is welded to the upper guide rail support 11, and the upper guide rail support 11 is welded to the side inner wall of the housing 2.

[0074] In practical use, the high-temperature material falls naturally into the casing 2 of the scraper conveyor under gravity through the feed inlet 1, passes through the upper scraper and chain 4, and falls onto the bottom plate of the casing 2. The rotating sprocket 5 drives the scraper and chain 4 to deliver the high-temperature material to the discharge outlet 3 and out. During this process, the scraper and chain 4 first move along the lower chain guide 6 on the bottom plate of the casing 2, and then are lifted by the sprocket 5, moving along the upper chain guide 7 to the sprocket 5 on the other side, where they are driven down and circulated.

[0075] In this embodiment, the cooling structure can be disposed on the outer wall of the housing 2. Specifically, the cooling structure may include a first water-cooled pipe assembly disposed on the bottom wall 22, thereby facilitating efficient cooling of the bottom wall 22, which is in direct contact with high-temperature materials. Furthermore, the cooling structure may also include a second water-cooled pipe assembly disposed on the side wall. Further, the cooling structure may also be disposed on the top wall 21 of the housing 2.

[0076] like Figure 2 or Figure 7 As shown, taking the example where the surface area of ​​the third sidewall 25 and the fourth sidewall is larger than that of the first sidewall 23 and the second sidewall 24, the second water-cooling pipe assembly can be provided in at least one of the third sidewall 25 and the fourth sidewall with the relatively larger surface area. Of course, the second water-cooling pipe assembly can also be provided in at least one of the first sidewall 23 and the second sidewall 24. In this embodiment, the example mainly uses the first water-cooling pipe assembly provided on the bottom wall 22 and the second water-cooling pipe assembly provided on the third sidewall 25 and the fourth sidewall for illustration.

[0077] Please refer to the following: Figure 3 The first water-cooled pipe assembly includes a plurality of water-cooled pipes 8 extending longitudinally along the first direction X. The first water-cooled pipe assembly may include at least one cooling water inlet 9 and at least one cooling water outlet 10; in the first direction X, at least one cooling water inlet 9 is disposed opposite to the feed inlet 1, and at least one cooling water outlet 10 is disposed opposite to the discharge outlet 3. The direction of movement of the cooling water is opposite to the direction of movement of the material, and the two can form convective motion, thereby ensuring better heat exchange effect. For example, the high-temperature material can move from left to right at the bottom, and the cooling water can flow from right to left.

[0078] The water-cooled pipe 8 can be evenly arranged along the outer wall of the box 2, thereby covering the high-temperature area of ​​the box 2 (such as the side wall in contact with the material of the scraper conveyor), making the cooling more uniform, avoiding local overheating (such as the high-temperature point in the material accumulation area when the scraper conveyor is conveying), and ensuring that the temperature of the box 2 wall surface drops to a safe range quickly.

[0079] Specifically, the water-cooling pipe 8 can be a semi-circular pipe with one side open, and the open side of the water-cooling pipe 8 is sealed on the outer wall of the housing 2. The water-cooling pipe 8 is either welded to the housing 2 or integrally formed with the housing 2.

[0080] When the water-cooling pipe 8 adopts a semi-circular pipe with one side open, it has the following advantages: First, the cooling water flowing in the water-cooling pipe 8 can directly contact the outer wall of the box 2, thereby enabling efficient heat exchange with the box 2. Specifically, compared with traditional sleeve-type (air may be present in the gap) or spray-type (only partial contact) cooling, the heat transfer area is significantly increased (close to the inner surface area of ​​the semi-circular pipe), and the thermal resistance of direct metal-to-metal contact is much smaller than that of air gaps, so the heat is transferred from the wall of the box 2 to the coolant faster. Second, since the semi-circular pipe can withstand high pressure independently, high-velocity cooling water can be introduced (the higher the velocity, the greater the convective heat transfer coefficient h), which can quickly remove the heat from the wall of the box 2.

[0081] Secondly, the cooling structure can withstand pressure independently, overcoming the low-pressure limitations of the main body of the housing 2. The cooling water pressure is completely isolated from the internal pressure of the housing 2. The cooling channel formed by the semi-circular tube is independent of the internal space of the housing 2, and its pressure is borne by the semi-circular tube itself and its welding strength, unrelated to the main body of the housing 2. Therefore, the high-pressure forced circulation requirements can be met by designing a high-strength semi-circular tube, fundamentally solving the contradiction of "low pressure limitation of housing 2 in cooling". The semi-circular tube is smaller in size (compared to the overall housing 2), and can be designed separately for high-pressure conditions (such as increasing wall thickness, optimizing weld coefficient, and using arc transition to reduce stress concentration). Its pressure-bearing capacity can be easily achieved through a simple structure, without the need for high-pressure modification of the large housing 2 as a whole, resulting in lower cost and higher feasibility. Furthermore, when using this semi-circular tube itself to manufacture the water-cooled pipe 8, the manufacturing process is simple and cost-effective.

[0082] In addition, when the water-cooling structure is installed on the outer wall of the enclosure 2, each water-cooling pipe 8 acts as a reinforcing rib, which can also strengthen the structure of the enclosure 2 itself and improve the strength and reliability of the enclosure 2.

[0083] In other embodiments, the water-cooling pipe 8 is a shaped pipe with a D-shaped cross-section, or the water-cooling pipe 8 is a flat pipe, and the outer wall surface of the water-cooling pipe 8 can form surface contact with the outer wall surface of the housing 2.

[0084] In this embodiment, it is not ruled out that the water-cooling pipe 8 may be configured in other ways that allow it to contact the outer wall surface of the housing 2. Furthermore, multiple water-cooling pipe assemblies may be formed on the same outer wall, for example, such as... Figure 8 As shown, a set of water-cooled pipe assemblies is provided on the left and right sides respectively. Overall, the water-cooled pipe assembly composed of the multiple water-cooled pipes 8 can achieve or basically achieve the implementation effect of the above-mentioned semi-circular pipe embodiment. In detail, this application will not elaborate further.

[0085] In this embodiment, multiple water-cooled pipes 8 are connected in series and / or in parallel.

[0086] like Figure 4 As shown, in one embodiment, a plurality of water-cooled pipes 8 are connected in series, and the ends of the plurality of water-cooled pipes 8 are connected through a connecting part to form a reciprocating coil.

[0087] When multiple water-cooled pipes (8 phases) are connected in series, the water-cooled pipe assembly may include a cooling water inlet (9) and a cooling water outlet (10). This water-cooled pipe assembly can be formed by bending a single semi-circular pipe, thus ensuring structural reliability while reducing manufacturing costs. Of course, the formation of this water-cooled pipe assembly is not limited to the examples above; this application does not impose a single specific limitation.

[0088] like Figure 5 As shown, in another embodiment, a plurality of the water-cooling pipes 8 are arranged in parallel. Along the first direction X, a water distribution section is provided near the cooling water inlet 9, and a water collection section is provided near the cooling water outlet 10. The water distribution section is used to distribute the cooling water flowing in from the cooling water inlet 9 to each water-cooling pipe 8, and the water collection section is used to collect the water flowing out from each water-cooling pipe 8 and then flow it to the cooling water outlet 10.

[0089] When multiple water-cooled tubes 8 are connected in parallel, the water-cooled tube assembly can achieve parallel connection by setting a water distribution section at the cooling water inlet 9 and a water collection section at the cooling water outlet 10. Compared with the series implementation, when using water-cooled tubes 8 of the same size, the parallel implementation has a larger overall water flow rate, which is more conducive to improving heat exchange efficiency.

[0090] The drive device 13 is connected to the cooling water inlet 9 via the connecting pipe 12, and is used to drive the cooling water through the cooling water inlet 9 into the water-cooled pipe 8, exchange heat with the housing 2, and then flow out through the cooling water outlet 10. Specifically, the drive device 13 can be in the form of a water pump.

[0091] During operation, cooling water, driven by the drive unit 13, enters each cooling water inlet 9 and flows along the water-cooling pipes 8. After absorbing heat and heating up from the housing 2, it is discharged from the cooling water outlet 10. After cooling externally, it is pumped back into the cooling water inlet 9 by a water pump to form a circulation. During operation, the housing 2, chain guide rails, and other structures are heated due to heat transfer from high-temperature materials or ambient heat. This heat is carried away by the continuously circulating cooling water through thermal convection, allowing the equipment to maintain a lower temperature and increasing its service life. In this process, the heat from the high-temperature materials is also continuously carried away, thus the equipment also serves to cool the materials.

[0092] like Figure 9 As shown, in one embodiment, the scraper conveyor may further include a preheating heat exchanger 14, which is connected to the drive device 13 and the cooling water inlet 9 via the connecting pipe 12. The preheating heat exchanger 14, the drive device 13, and the water-cooled pipe 8 form a cooling circulation channel through the connecting pipe 12. When the drive device 13 is started, the cooling water in the preheating heat exchanger 14 flows into the cooling water inlet 9 through the connecting pipe 12, flows through the water-cooled pipe 8, flows out through the cooling water outlet 10, and then returns to the preheating heat exchanger 14 through the connecting pipe 12.

[0093] In this embodiment, the drive unit 13, the cooling structure, and the external waste heat exchanger can be connected via the connecting pipe 12. During use, the water that has carried away the heat from the tank 2 through the cooling structure can return to the preheating heat exchanger 14, achieving cooling and circulation.

[0094] The cooling water outlets 10 of each cooling water component converge and connect to a connecting pipe, in which a water pump is installed. The outlet of the water pump connects to each cooling water inlet 9. The connecting pipe connects to a preheating heat exchanger 14, which can be a plate heat exchanger. The preheating heat exchanger 14 has a first channel for circulating cooling water and a second channel for circulating heating water. The second channel has a heating water inlet 141 for introducing heating water and a heating water outlet 142 for discharging heating water. The first channel has an inlet 143 for introducing heated cooling water and an outlet 144 for discharging cooling water that has absorbed heat from the heating water. When the heated cooling water flows through the first channel, it exchanges heat with the heating water flowing through the second channel and is cooled. This heat can then be utilized in the heating water supply, thereby achieving energy recovery. In addition, the connecting pipe is also equipped with valves, venting points, drain points, and other necessary auxiliary devices.

[0095] In one embodiment, the cooling structure further includes at least one second water-cooling pipe assembly disposed on the side wall. The second water-cooling assembly includes a plurality of water-cooling pipes 8 extending longitudinally along the first direction X. The plurality of water-cooling pipes 8 are connected in series and / or in parallel. The second water-cooling pipe assembly is connected in series or in parallel with the first water-cooling pipe assembly.

[0096] The second water-cooled pipe assembly is connected in parallel with the first water-cooled pipe assembly; the second water-cooled pipe assembly includes at least one cooling water inlet 9 and at least one cooling water outlet 10; in the first direction X, at least one of the cooling water inlets 9 is disposed away from the feed inlet 1, and at least one of the cooling water outlets 10 is disposed away from the discharge outlet 3.

[0097] In this embodiment, the specific configuration of the second water-cooled pipe assembly can refer to the specific configuration of the first water-cooled pipe assembly described above, and will not be elaborated further here.

[0098] like Figure 9 As shown, the second water-cooled pipe assembly and the first water-cooled pipe assembly can be connected in parallel. For the second water-cooled pipe assembly installed on the side wall of the housing 2, in the first direction X, the cooling water outlet 10 and the cooling water inlet 9 can be positioned with reference to the specific configuration of the first water-cooled pipe assembly. In the height direction, i.e., in the third direction Z perpendicular to the first direction X and the second direction Y, the cooling water inlet 9 can be located below the cooling water outlet 10. This configuration enables convective heat transfer, which is beneficial for further improving the heat transfer effect.

[0099] In a specific application scenario, this scraper conveyor can be used at the lower part of the flue gas duct of a steelmaking converter, such as... Figure 6 and Figure 7 As shown, the flue gas carries a large amount of dust to the feed inlet 1, leaves some dust, and then leaves from the feed inlet 1. The flue gas and the leftover soot can reach 600-700℃.

[0100] The cigarette ash falls naturally into the scraper conveyor through the feed inlet 1, passes through the upper scraper and chain 4, and falls onto the bottom plate of the housing 2. The rotating sprocket 5 drives the scraper and chain 4 to deliver the cigarette ash to the discharge outlet 3 and out. During this process, the scraper and chain 4 first move along the lower chain guide 6 on the bottom plate of the housing 2, and then are lifted by the sprocket 5, moving along the upper chain guide 7 to the sprocket 5 on the other side, where they are driven down and circulated.

[0101] Meanwhile, cooling water is pumped into each cooling water inlet 9 via connecting pipe 12, and then flows along water-cooled pipe 8 in the opposite direction to the ash conveying direction. It flows upwards along the coil, absorbing heat from the housing 2 and then being discharged from cooling water outlet 10. During operation, the housing 2, scraper, chain 4, chain guide rail, and other structures are heated by the high-temperature ash and flue gas. This heat is carried away by the continuously circulating cooling water, maintaining the equipment at a lower operating temperature and increasing its service life. In this process, the heat from the high-temperature ash is also continuously carried away, and the ash temperature at the equipment outlet can drop below 200℃. Therefore, this equipment also serves to cool the high-temperature ash.

[0102] It should be noted that in the description of this application, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more.

[0103] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0104] The above are merely a few embodiments of this utility model. Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in this utility model. However, the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. A scraper conveyor, characterized in that, The scraper conveyor includes: The box has opposing top and bottom walls and side walls surrounding the top and bottom walls. The top wall is provided with a feed inlet and the bottom wall is provided with a discharge outlet. The box extends longitudinally along a first direction. A conveying structure is provided in the housing and is used to convey the material flowing in through the inlet to the outlet and then out of the housing. A cooling structure includes a first water-cooled pipe assembly disposed on the bottom wall. The first water-cooled pipe assembly includes a plurality of water-cooled pipes extending longitudinally along the first direction. The plurality of water-cooled pipes are connected in series and / or in parallel. The first water-cooled pipe assembly includes at least one cooling water inlet and at least one cooling water outlet. In the first direction, at least one cooling water inlet is disposed close to the discharge port, and at least one cooling water outlet is disposed away from the discharge port. A drive device is connected to the cooling water inlet via a connecting pipe. The drive device drives the cooling water to enter the water-cooled pipe through the cooling water inlet, exchange heat with the housing, and then flow out through the cooling water outlet.

2. The scraper conveyor as described in claim 1, characterized in that, The water-cooling pipe is a semi-circular pipe with one side open, and the open side of the water-cooling pipe is sealed on the outer wall of the housing.

3. The scraper conveyor as described in claim 2, characterized in that, The water-cooling pipe is sealed and fixed to the box body by welding or the water-cooling pipe is integrally formed with the box body.

4. The scraper conveyor as described in claim 1, characterized in that, The scraper conveyor also includes a preheating heat exchanger, which is connected to the drive device and the cooling water inlet through the connecting pipe. The preheating heat exchanger, the drive device and the water-cooled pipe form a cooling circulation channel through the connecting pipe. When the drive device is started, the cooling water in the preheating heat exchanger flows into the cooling water inlet through the connecting pipe, flows through the water-cooled pipe, flows out through the cooling water outlet, and then returns to the preheating heat exchanger through the connecting pipe.

5. The scraper conveyor as described in claim 4, characterized in that, The preheating heat exchanger is provided with a first channel for circulating cooling water and a second channel for circulating heating water. The second channel has a heating water inlet for introducing heating water and a heating water outlet for discharging heating water. The first channel has an inlet for introducing heated cooling water and an outlet for discharging cooling water after it has absorbed heat from the heating water.

6. The scraper conveyor as described in any one of claims 1 to 3, characterized in that, The cooling structure further includes at least one second water-cooling pipe assembly disposed on the side wall. The second water-cooling assembly includes a plurality of water-cooling pipes extending longitudinally along the first direction. The plurality of water-cooling pipes are connected in series and / or in parallel. The second water-cooling pipe assembly is connected in series or in parallel with the first water-cooling pipe assembly.

7. The scraper conveyor as described in claim 6, characterized in that, The second water-cooled pipe assembly is connected in parallel with the first water-cooled pipe assembly; The second water-cooled pipe assembly includes at least one cooling water inlet and at least one cooling water outlet; in the first direction, at least one of the cooling water inlets is disposed opposite to the feed inlet, and at least one of the cooling water outlets is disposed opposite to the discharge outlet.

8. The scraper conveyor as described in claim 1, characterized in that, The water-cooling pipe is a D-shaped tube, or it is a flat tube, and the outer wall of the water-cooling pipe can form a surface contact with the outer wall of the housing.

9. The scraper conveyor as described in claim 1, characterized in that, Multiple water-cooled pipes are connected in series, and the ends of the multiple water-cooled pipes are connected through a connecting part to form a reciprocating coil.

10. The scraper conveyor as described in claim 1, characterized in that, Multiple water-cooled pipes are arranged in parallel. Along the first direction, a water distribution section is provided near the cooling water inlet, and a water collection section is provided near the cooling water outlet. The water distribution section is used to distribute the cooling water flowing in from the cooling water inlet to each water-cooled pipe, and the water collection section is used to collect the water flowing out from each water-cooled pipe and then flow it to the cooling water outlet.

11. The scraper conveyor as described in claim 1, characterized in that, The conveying structure includes: Along the first direction, the sprockets are respectively disposed at both ends of the housing; A scraper and chain are connected between the two sprockets, and the scraper and chain are spaced apart from the housing. The upper chain guide rail is fixed to the side wall of the box body and is used to support the scraper and chain on the upper side. The lower chain guide rail is fixed to the bottom wall of the housing and is used to support the scraper and chain on the lower side.

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