Vertical heat exchanger for clay cooling

Abstract

This invention provides a vertical heat exchanger for cooling clay, comprising: a shell having a deformable portion, with a cooling medium inlet and a hot air outlet on its side wall; a top perforated plate and a bottom perforated plate, each having multiple through holes, the top and bottom perforated plates being parallel to each other; multiple discharge steel pipes located within the shell, with both ends of each discharge steel pipe communicating with corresponding through holes on the top and bottom perforated plates, respectively; a baffle assembly including multiple first and second air guide baffles located between the top and bottom perforated plates, the multiple first and second air guide baffles being spaced apart and staggered along the axial direction of the shell; and an S-shaped cooling channel with both ends communicating with the cooling medium inlet and the hot air outlet, the S-shaped cooling channel including a first gap, a second gap, and a third gap between two adjacent air guide baffles. This application can ensure the stability of material pressure within the vertical heat exchanger and extend the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of clay cooling technology, and more particularly to a vertical heat exchanger for clay cooling. Background Technology

[0002] Calcined clay is a cement clinker substitute obtained by high-temperature processing of clay raw materials. Compared with traditional clinker, calcined clay does not produce carbon dioxide during heat treatment, only releasing water vapor and some trace emissions. Therefore, the cement produced from it has a carbon reduction of up to 40% compared to traditional cement. The chemical composition of calcined clay changes less, making the performance of cement products made from it more predictable and controllable. Calcined clay can solve the problem of lack of fly ash, slag, and other admixtures in some areas, and can be combined with other materials such as limestone to form ternary cement with excellent performance. Furthermore, the use of calcined clay helps reduce dependence on traditional clinker, thereby reducing carbon emissions and the need for imported raw materials, which meets the requirements of sustainable development.

[0003] For high-temperature clay calcined at 800-900℃, it is necessary to prevent it from being oxidized to red by contact with oxygen in the air during the cooling stage, and it is desirable for the calcined clay to remain gray after cooling. Therefore, a clay cooling device is needed to cool the calcined high-temperature clay to below 300℃ and ensure that the clay is not oxidized and discolored.

[0004] Currently, while existing clay cooling equipment can cool calcined clay, the thermal expansion and contraction of the discharge steel pipe caused by the temperature difference between the clay before and after cooling leads to unstable material pressure inside the equipment and a short equipment lifespan. Therefore, ensuring stable material pressure inside the clay cooling equipment and extending its service life are urgent technical problems to be solved. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a vertical heat exchange device for clay cooling to eliminate or improve one or more defects existing in the prior art.

[0006] One aspect of the present invention provides a vertical heat exchanger for cooling clay, the vertical heat exchanger comprising:

[0007] A housing having a deformable portion that can extend and retract along its axial direction, a feed inlet at the top of the housing, a discharge outlet at the bottom of the housing, a cooling medium inlet and a hot air outlet on the side wall of the housing, the hot air outlet being located at the end of the housing near the feed inlet, and the cooling medium inlet being located at the end of the housing near the discharge outlet;

[0008] Both the top perforated plate and the bottom perforated plate are located inside the housing, and both the top perforated plate and the bottom perforated plate have multiple through holes. The top perforated plate and the bottom perforated plate are parallel to each other, and the top perforated plate is located between the hot air outlet and the feed inlet, while the bottom perforated plate is located between the cooling medium inlet and the discharge outlet.

[0009] Multiple blanking steel pipes are located inside the housing, and both ends of each blanking steel pipe are connected to corresponding through holes on the top perforated plate and corresponding through holes on the bottom perforated plate, respectively.

[0010] The baffle assembly includes a plurality of first air guide baffles and a plurality of second air guide baffles. The plurality of first air guide baffles and the plurality of second air guide baffles are all located between the top perforated plate and the bottom perforated plate. The plurality of first air guide baffles and the plurality of second air guide baffles are spaced apart and staggered along the axial direction of the housing. Each first air guide baffle and each second air guide baffle is provided with a through hole for the material discharge steel pipe to pass through. The first air guide baffle extends horizontally from the first side wall of the housing toward the second side wall opposite to the first side wall. The second air guide baffle extends horizontally from the second side wall of the housing toward the first side wall. There is a first gap between the end of the first air guide baffle and the second side wall, and there is a second gap between the end of the second air guide baffle and the first side wall.

[0011] The S-shaped cooling channel is connected to the cooling medium inlet and the hot air outlet at both ends, respectively. The S-shaped cooling channel includes the first gap, the second gap, and the third gap between two adjacent air guide baffles.

[0012] In some embodiments of the present invention, the housing includes a detachably connected upper housing and a lower housing, the deformable portion is located on the lower housing, and the bottom end of the upper housing has a support ring seat for supporting the vertical heat exchanger.

[0013] In some embodiments of the present invention, the deformable portion includes a flexible shell segment and an elastic member disposed on the outer periphery of the flexible shell segment, the elastic member being compressed and released synchronously with the extension and retraction movement of the flexible shell segment.

[0014] In some embodiments of the present invention, the elastic component includes a first spring and a second spring, and an upper fixing plate and a lower fixing plate are respectively provided on the top outer periphery and the bottom outer periphery of the flexible shell segment. The first spring is located between the upper fixing plate and the lower fixing plate, and the second spring is located on the top of the upper fixing plate.

[0015] In some embodiments of the present invention, the vertical heat exchanger includes a material distribution device, which includes a rotary drive component and a material distribution disc. The rotary drive component is disposed above the top side wall of the housing, and the material distribution disc is located inside the housing and at the bottom of the feed inlet. The material distribution disc is connected to the output end of the rotary drive component so that the rotary drive component drives the material distribution disc to rotate.

[0016] In some embodiments of the present invention, the material distribution tray includes an outer ring shell, a plurality of partitions and a shaft. The plurality of partitions are arranged radially along the outer ring shell, and the middle surface of each partition coincides with the central axis of the outer ring shell. The shaft is located on one side of the outer ring shell, and the axis of the shaft is collinear with the central axis of the outer ring shell.

[0017] In some embodiments of the present invention, the vertical heat exchanger further includes a filter screen located inside the housing and between the material distribution plate and the top perforated plate.

[0018] In some embodiments of the present invention, the vertical heat exchanger includes a pressure equalization module located between the bottom orifice plate and the outlet. The pressure equalization module includes multiple conical material equalization rings, each of which has a top opening and a bottom opening. The multiple conical material equalization rings are nested sequentially, and the sidewalls of two adjacent conical material equalization rings are fixedly connected. The size of the top opening of the multiple conical material equalization rings increases sequentially from the inside to the outside, and there is a distance between the bottom openings of two adjacent conical material equalization rings.

[0019] In some embodiments of the present invention, the vertical heat exchanger includes a rotary discharge valve, which is disposed below the discharge port.

[0020] In some embodiments of the present invention, the figure formed by connecting the midpoints of three adjacent through holes on the top perforated plate and the bottom perforated plate is an equilateral triangle; and / or, the blanking steel pipe is welded and sealed to both the top perforated plate and the bottom perforated plate.

[0021] The vertical heat exchanger for clay cooling disclosed in the above embodiments of the present invention includes a shell, a top perforated plate, a bottom perforated plate, a discharge steel pipe, a partition assembly, and an S-shaped cooling channel. The shell has a deformable part that can extend and retract along its axial direction. That is, when the discharge steel pipe expands and contracts due to temperature changes in the clay, the shell extends or shortens synchronously with the discharge steel pipe. Furthermore, the vertical heat exchanger is equipped with an S-shaped cooling channel, which not only ensures the stability of the material pressure in the clay cooling equipment and improves the cooling efficiency of calcined clay, but also avoids malfunctions caused by deformation of the discharge steel pipe, thereby extending the service life of the equipment.

[0022] In addition, the vertical heat exchanger for clay cooling in this application is equipped with a rotary feeder, which ensures uniform material discharge from each feed steel pipe and ensures that the material height above each feed steel pipe is the same, thereby ensuring the stability and uniformity of material pressure within the vertical heat exchanger. This further ensures the consistency of elongation or contraction of each feed steel pipe and further extends the service life of the vertical heat exchanger.

[0023] In addition to the above, the vertical heat exchanger for clay cooling in this application is provided with a pressure equalization module between the bottom perforated plate and the discharge port, and the pressure equalization module includes multiple conical material equalization rings. The pressure equalization module further reduces the material pressure difference in multiple discharge steel pipes, thereby ensuring the consistency of the material reaction force, thereby improving the uniformity of the material flow rate in the discharge steel pipes and improving the heat exchange effect of calcined clay.

[0024] Additional advantages, objects, and features of the invention will be set forth in part in the description which follows, and will also become apparent in part to those skilled in the art upon studying the description, or may be learned by practice of the invention. The objects and other advantages of the invention can be realized and obtained by means of the structures specifically pointed out in the description and drawings.

[0025] Those skilled in the art will understand that the objectives and advantages achievable with the present invention are not limited to those specifically described above, and that the above and other objectives achievable with the present invention will become clearer from the following detailed description. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, are not intended to limit the scope of the invention. The components in the drawings are not drawn to scale but are merely illustrative of the principles of the invention. For ease of illustration and description of certain parts of the invention, corresponding portions in the drawings may be enlarged, i.e., may appear larger relative to other components in an exemplary device actually manufactured according to the invention. In the drawings:

[0027] Figure 1 This is a schematic diagram of a vertical heat exchanger for cooling clay according to an embodiment of this application.

[0028] Figure 2 for Figure 1 The image shows a vertical heat exchanger for cooling clay, viewed from direction A.

[0029] Figure 3 for Figure 1 The image shows a BB-direction view of a vertical heat exchanger used for clay cooling.

[0030] Figure 4 for Figure 1A partial schematic diagram of the cloth-feeding device of a vertical heat exchanger used for clay cooling is shown.

[0031] Figure 5 for Figure 4 The diagram shows the structure of the material distribution plate of the fabric distribution device.

[0032] Figure 6 for Figure 1 The diagram shows the internal structure of the pressure equalization module in a vertical heat exchanger used for clay cooling.

[0033] Figure 7a This is a schematic diagram of the seal between the unloading steel pipe and the top orifice plate.

[0034] Figure 7b This is a schematic diagram of the seal between the discharge steel pipe and the bottom orifice plate.

[0035] Figure 8 This is a schematic diagram showing the connection between the unloading steel pipe and the partition plate.

[0036] Figure label:

[0037] Upper housing 110 Lower housing 120 Inlet 131 Outlet 132 Cooling medium inlet 133 Hot air outlet 134 Top perforated plate 141 Bottom perforated plate 142 Drop steel pipe 200 First air guide baffle 310 Second air guide baffle 320 S-shaped cooling channel 400 Support ring seat 111 Flexible housing section 121 First spring 122 Second spring 123 Upper fixed plate 124 Lower fixed plate 125 Rotary drive component 510 Material distribution plate 520 Outer ring housing 521 Baffle 522 Shaft 523 Filter screen 600 First conical material distribution ring 710 Second conical material distribution ring 720 Third conical material distribution ring 730 Rotary discharge valve 800 Upper limit of material level 911 Lower limit of material level 912 Material level sensor 913 First temperature sensor 921 Second temperature sensor 922 Third temperature sensor 923 Fourth temperature sensor 924 Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0039] It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0040] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.

[0041] It should also be noted that, unless otherwise specified, the terms "installation," "connection," "communication," and "fixation" should be interpreted broadly. For example, "communication" can refer to a fixed connection or a detachable connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection with an intermediate component. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In the following description, embodiments of the invention will be illustrated with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar parts, or the same or similar steps.

[0043] Figure 1 This is a schematic diagram of the structure of a vertical heat exchanger for cooling clay according to an embodiment of this application. Figure 2 for Figure 1 The vertical heat exchanger for clay cooling shown is a view from direction A, as follows: Figure 1 and Figure 2 As shown, the vertical heat exchanger includes a shell, a top perforated plate 141, a bottom perforated plate 142, multiple discharge steel pipes 200, a baffle assembly, and an S-shaped cooling channel 400.

[0044] The housing has a deformable portion that can extend and retract along its axial direction. The top of the housing has a feed inlet 131, and the bottom of the housing has a discharge outlet 132. The sidewall of the housing has a cooling medium inlet 133 and a hot air outlet 134. The hot air outlet 134 is located at the end of the housing near the feed inlet 131, and the cooling medium inlet 133 is located at the end of the housing near the discharge outlet 132. A top perforated plate 141 and a bottom perforated plate 142 are both located within the housing, and each has multiple through holes. The top perforated plate 141 and the bottom perforated plate 142 are parallel to each other, with the top perforated plate 141 located between the hot air outlet 134 and the feed inlet 131, and the bottom perforated plate 142 located between the cooling medium inlet 133 and the discharge outlet 132. Multiple discharge steel pipes 200 are located within the housing, and both ends of each discharge steel pipe 200 are connected to corresponding through holes on the top perforated plate 141 and the bottom perforated plate 142, respectively. The baffle assembly includes multiple first air guide baffles 310 and multiple second air guide baffles 320, all located within the housing and between the top perforated plate 141 and the bottom perforated plate 142. The multiple first air guide baffles 310 and multiple second air guide baffles 320 are spaced apart and staggered along the axial direction of the housing. Both the first air guide baffle 310 and each of the second air guide baffles 320 are provided with through holes for the material discharge steel pipe 200 to pass through. The first air guide baffle 310 extends horizontally from the first side wall of the housing toward the second side wall opposite to the first side wall. The second air guide baffle 320 extends horizontally from the second side wall of the housing toward the first side wall. There is a first gap between the end of the first air guide baffle 310 and the second side wall, and a second gap between the end of the second air guide baffle 320 and the first side wall. The two ends of the S-shaped cooling channel 400 are respectively connected to the cooling medium inlet 133 and the hot air outlet 134. The S-shaped cooling channel includes the first gap, the second gap, and a third gap between two adjacent air guide baffles.

[0045] In the above embodiment, the top perforated plate 141, the bottom perforated plate 142, multiple discharge steel pipes 200, the baffle assembly, and the S-shaped cooling channel 400 are all located inside the shell. Specifically, the high-temperature clay, after being calcined inside the preheater and reaching a temperature of 700–900°C, flows from the bottom outlet of the preheater into the inlet 131 of the shell. The high-temperature clay then flows from top to bottom through the multiple discharge steel pipes 200 to the outlet at the bottom of the shell. Simultaneously, the cooling medium in the S-shaped cooling channel 400 flows from bottom to top outside the discharge steel pipes, exchanging heat with the calcined clay inside the discharge steel pipes 200. The hot air after heat exchange is output from the hot air outlet 134, thereby cooling the high-temperature clay to below 300°C. This vertical heat exchanger can use air as the cooling medium, which is readily available and low in cost. Furthermore, the heated air output from the hot air outlet 134 can be further utilized, thus avoiding heat loss caused by intermediate media and improving the heat utilization rate of the calcined clay. In this embodiment, the S-shaped cooling channel includes the first gap, the second gap, and a third gap between two adjacent air guide baffles, such as... Figure 1 As shown, the cooling medium flows along the black S-shaped channel. In this embodiment, the gap between the first and second air guide baffles is the third gap. In some embodiments, the S-shaped cooling channel may further include a fourth gap and a fifth gap. The fourth gap may be the gap between the topmost first air guide baffle and the top perforated plate, and the fifth gap may be the gap between the bottommost second air guide baffle and the bottom perforated plate; that is, in this embodiment, the S-shaped cooling channel is formed by the first gap, the second gap, the third gap, the fourth gap, and the fifth gap.

[0046] In addition, when the high-temperature clay flows from top to bottom through the discharge steel pipe 200, the discharge steel pipe 200 will elongate due to thermal expansion and contraction. At this time, since the two ends of the discharge steel pipe 200 are fixed to the top orifice plate 141 and the bottom orifice plate 142 respectively, and the shell has a deformable part that can expand and contract along the axial direction of the shell, the deformable part of the shell will deform as the discharge steel pipe 200 elongates. At this time, the deformable part of the shell compensates for the deformation of the discharge steel pipe 200, thereby preventing the discharge steel pipe 200 from bending due to thermal expansion and elongation, and avoiding affecting the connection and sealing between the discharge steel pipe and the top or bottom orifice plate, thus ensuring the flow stability of the clay in the discharge steel pipe 200. Correspondingly, when the discharge steel pipe 200 shrinks in length due to the release of heat, the deformed part of the shell will shrink back along with the discharge steel pipe 200, thereby avoiding the phenomenon of non-sealing at the connection between the discharge steel pipe 200 and the top perforated plate 141 and the bottom perforated plate 142 due to the deformation of the discharge steel pipe 200. This improves the heat exchange efficiency of the vertical heat exchanger and avoids damage to the vertical heat exchanger, thereby extending the service life of the vertical heat exchanger.

[0047] Furthermore, the housing includes a detachably connected upper housing 110 and a lower housing 120, the deformable portion being located on the lower housing 120, and the bottom end of the upper housing 110 having a support ring seat 111 for supporting the vertical heat exchanger. Figure 1 As can be seen, the support ring seat 111 is specifically located at the bottom end of the upper shell 110, and the support ring seat 111 serves to support the vertical heat exchanger. The deformable part is specifically located at the top end of the lower shell 120. In this embodiment, the top perforated plate 141 is fixedly connected to the side wall of the upper shell 110, and the bottom perforated plate 142 is fixedly connected to the side wall of the lower shell 120. That is, the top perforated plate 141 is specifically located at the top end of the upper shell 110, and the bottom perforated plate 142 is specifically located at the bottom end of the lower shell 120. Since the support ring seat 111 on the upper shell 110 supports the entire vertical heat exchanger, when the discharge steel pipe 200 elongates or shortens due to thermal expansion and contraction, the deformable part of the lower shell 120 will deform, that is, the lower shell 120 will also elongate or shorten, so that the shell and the discharge steel pipe 200 deform in the same way. It is understood that the example of setting the deformable part on the lower housing 120 in this embodiment is just one example. In some other embodiments, the deformable part may also be set on the upper housing 110, as long as the lower housing 120 is fixed in this case.

[0048] Furthermore, when the deformable part is located on the lower housing 120, since the deformation of the lower housing 120 is caused by the material discharge pipe 200 lifting or pulling the bottom perforated plate 142, the connection stability between the material discharge pipe 200 and the top and bottom perforated plates 141 and 142 should be ensured. Additionally, to improve the pressure stability during material descent, the sealing at the connection points between the material discharge pipe 200 and the top and bottom perforated plates 141 and 142 should also be ensured. For example, such as... Figure 7a and Figure 7b As shown, the material discharge steel pipe 200 is welded to the top perforated plate 141 and the bottom perforated plate 142. It can be understood that the sealing method between the material discharge steel pipe 200 and the top perforated plate 141 and the bottom perforated plate 142 listed in this embodiment is only an example. In other embodiments, other types of sealing methods may also be used.

[0049] In one embodiment, the deformable portion includes a flexible shell segment 121 and an elastic member disposed on the outer periphery of the flexible shell segment 121. The elastic member is compressed and released synchronously with the expansion and contraction of the flexible shell segment. For example, the ratio of the length of the flexible shell segment to the total length of the lower shell 120 can range from 1:8 to 1:3. Specifically, the flexible shell segment can be made of a flexible material. This flexible shell segment adaptively deforms based on the length change of the blanking steel pipe 200, thereby ensuring that the total length of the shell adapts to the length of the blanking steel pipe 200, and maintaining the sealing at the connection points between the blanking steel pipe and the top perforated plate 141 and the bottom perforated plate 142 even when the length of the blanking steel pipe 200 changes. Specifically, the flexible shell segment can be implemented using a deformable steel pipe.

[0050] Furthermore, the elastic component includes a first spring 122 and a second spring 123. An upper fixing plate 124 and a lower fixing plate 125 are respectively provided on the top and bottom outer peripheries of the flexible housing segment 121. The first spring 122 is located between the upper fixing plate 124 and the lower fixing plate 125, and the second spring 123 is located on top of the upper fixing plate 124. Figure 1 As shown, the upper fixing plate 124 and the lower fixing plate 125 are respectively fixed on the lower housing 120, and the upper fixing plate 124 and the lower fixing plate 125 are located at the top and bottom of the flexible segment respectively. In this embodiment, when the flexible segment deforms, the first spring 122 is compressed or released, and one end of the second spring 123 abuts against the top end of the upper fixing plate 124. The other end of the second spring 123 is provided with a nut. Tightening or loosening the nut can adjust the preload of the second spring 123.

[0051] In some embodiments of the present invention, the vertical heat exchanger includes a material distribution device, which includes a rotary drive component 510 and a material distribution disk 520. The rotary drive component 510 is disposed above the top side wall of the housing, and the material distribution disk 520 is located inside the housing and at the bottom of the feed inlet 131. The material distribution disk 520 is connected to the output end of the rotary drive component 510 so that the rotary drive component 510 drives the material distribution disk 520 to rotate. Figure 4 This is a partial schematic diagram of the cloth-feeding device of a vertical heat exchanger for clay cooling according to an embodiment, as shown below. Figure 4As shown, the rotary drive component 510 is fixed to the top of the upper housing 110, while the material distribution plate 520 is located inside the upper housing 110, with a certain distance between the material distribution plate 520 and the top side wall of the upper housing 110. In this embodiment, the rotary drive component 510 drives the material distribution plate 520 to rotate, so that the high-temperature clay input from the feed port 131 is dispersed by the rotating material distribution plate 520, and the dispersed high-temperature clay particles are evenly dropped into multiple material distribution steel pipes. In addition, the material distribution device can also ensure that the material height above each material distribution steel pipe 200 is the same, thereby ensuring the stability of the material pressure in the vertical heat exchanger and ensuring the consistency of the elongation or contraction of each material distribution steel pipe 200. For example, the rotary drive component 510 can be a motor. In this case, the output shaft of the motor can extend directly from the top of the upper housing 110 to the interior of the upper housing 110, and the output shaft of the motor is connected to the material distribution plate 520. In addition, a mechanical transmission component, such as a gear transmission mechanism, can be provided between the motor and the material distribution plate 520. In this case, the driving gear is fixedly connected to the output shaft of the motor, and the driven gear is fixedly connected to the central shaft of the material distribution plate 520. The meshing of the driving gear and the driven gear enables the rotary drive component 510 to drive the material distribution plate 520 to rotate.

[0052] Furthermore, the material distribution tray 520 includes an outer ring housing 521, a plurality of partitions 522, and a shaft 523. The partitions 522 are all arranged radially along the outer ring housing 521, and the mid-surface of each partition 522 coincides with the central axis of the outer ring housing 521. The shaft 523 is located on one side of the outer ring housing 521, and the axis of the shaft 523 is collinear with the central axis of the outer ring housing 521. Figure 5 As shown, the outer ring shell 521 can be circular, and there are four partitions 522. These four partitions 522 are arranged radially along the outer ring shell 521, staggered, and the symmetrical center plane of each partition 522 intersects the axis of the outer ring shell 521. The four partitions 522 divide the outer ring shell 521 into eight fan-shaped slots. When the material equalization disc 520 rotates, the partitions 522 disperse the calcined clay input through the feed inlet 131. The dispersed calcined clay then falls from the fan-shaped slots between the partitions 522 into the discharge steel pipe 200 located below the material equalization disc 520. In this embodiment, the shaft 523 of the material equalization disc 520 is connected to the output end of the rotary drive component 510. The shaft 523 is specifically located at the center of the outer ring shell 521 and is coaxial with the outer ring shell 521.

[0053] To further improve the flow stability of materials within the discharge steel pipe 200, the vertical heat exchanger also includes a filter screen 600. The filter screen 600 is located within the housing and between the material distribution plate 520 and the top perforated plate 141. (Reference) Figure 1 The filter screen 600 is specifically located below the material distribution plate 520. The filter screen 600 is used to filter the larger volume of calcined clay after it has been further dispersed by the material distribution plate 520, so as to prevent the larger volume of calcined clay from clogging the feed steel pipe 200. When the upper shell 110 is a cylindrical shell, the filter screen 600 can specifically be a circular filter screen 600, which is fixedly connected to the inner side wall of the upper shell 110.

[0054] In some embodiments of the present invention, the vertical heat exchanger includes a pressure equalization module located between the bottom orifice plate 142 and the discharge port 132. The pressure equalization module includes multiple conical material equalization rings, each with a top opening and a bottom opening. The multiple conical material equalization rings are nested sequentially, with the sidewalls of adjacent rings fixedly connected. The size of the top openings of the multiple conical material equalization rings increases sequentially from the inside to the outside, and there is a distance between the bottom openings of adjacent rings. This pressure equalization module is used to reduce the pressure difference of the material falling through each discharge steel pipe 200, ensuring the consistency of the material's reaction force, improving the uniformity of the material flow rate within the discharge steel pipe 200, and improving the heat exchange effect of the calcined clay.

[0055] Figure 6 This is a schematic diagram of the internal structure of the pressure equalization module of a vertical heat exchanger for clay cooling according to an embodiment of this application. Figure 6 As shown, the pressure equalization module may include three conical material equalization rings, which may be referred to as the first conical material equalization ring 710, the second conical material equalization ring 720 and the third conical material equalization ring 730 from the inside to the outside. The bottom opening of the three material equalization rings increases in size in sequence. The side wall of the first conical material equalization ring 710 is fixedly connected to the side wall of the second conical material equalization ring 720, and the side wall of the second conical material equalization ring 720 is fixedly connected to the side wall of the third conical material equalization ring 730. The material can flow from the discharge steel pipe 200 to the discharge port 132 between the side walls of the two fixedly connected conical material equalization rings. In this embodiment, the top openings of the second conical material leveling ring 720 and the third conical material leveling ring 730 are flush, and the top opening of the first conical material leveling ring 710 is higher than the top openings of the second conical material leveling ring 720 and the third conical material leveling ring 730. Alternatively, the top openings of the first conical material leveling ring 710, the second conical material leveling ring 720, and the third conical material leveling ring 730 can be configured to gradually decrease in height. It is understood that the use of three conical material leveling rings in this embodiment is merely an example; in other embodiments, more conical material leveling rings may be used.

[0056] Furthermore, the vertical heat exchanger includes a rotary discharge valve 800, which is located below the discharge port 132. For example... Figure 6As shown, the inlet of the rotary feeder valve 800 is connected to the outlet 132 at the bottom of the housing. The rotary feeder valve 800 is used to control the speed at which material flows through the discharge steel pipe 200, ensuring that all steel pipes are always full of material, and that the material flows slowly and uniformly downward in the discharge steel pipe.

[0057] In some other embodiments, the lines connecting the midpoints of three adjacent through holes on the top perforated plate 141 and the bottom perforated plate 142 form an equilateral triangle, such as... Figure 3 As shown, the cross-sectional shape of the shell is circular. At this time, the line connecting the centers of the cross-sections of the three adjacent blanking steel pipes 200 also forms an equilateral triangle. Understandably, the centers of the cross-sections of the three adjacent blanking steel pipes 200 are not on a straight line.

[0058] In addition, when the discharge steel pipe 200 extends or retracts, in order to ensure that the discharge steel pipe 200 is movable relative to the air guide baffle, the discharge steel pipe 200 and the through hole on the air guide baffle are clearance fitted (see reference). Figure 8 Additionally, vertical heat exchangers may also be equipped with an upper limit material level 911 and a lower limit material level 912, such as... Figure 1 As shown, the upper limit 911 and lower limit 912 of the material level are located above the equalization tray 520 and below the filter screen 600, respectively. When the material level in the vertical heat exchanger is higher than the upper limit 911, the feeding into the vertical heat exchanger stops. When the material level in the vertical heat exchanger is lower than the lower limit 912, the feeding is insufficient, and the feeding into the vertical heat exchanger continues. In addition, a material level sensor 913 is also provided above the discharge port 132. At this time, the rotary discharge valve 800 is used to control the discharge speed based on the material level detected by the material level sensor 913. In addition to the above, the vertical heat exchanger also includes multiple temperature sensors. The first temperature sensor 921 is used to measure the cold air temperature at the cooling medium inlet 133, the second temperature sensor 922 is used to monitor the hot air temperature at the hot air outlet 134, the third temperature sensor 923 is used to monitor the material feeding temperature, and the fourth temperature sensor 924 is used to monitor the discharge temperature.

[0059] In the vertical heat exchanger of this application, when cooling calcined clay, high-temperature clay particles smaller than 90µm flow from the external preheater outlet into the feed inlet at the top of the vertical heat exchanger and further fall onto the equalization plate. At this time, the rotary drive component drives the equalization plate to rotate, breaking up the calcined clay input from the feed inlet. The broken clay particles are filtered through a filter screen below the equalization plate, and the filtered clay particles flow downwards at a constant speed through each drop steel pipe. Simultaneously, the cold air flowing in the S-shaped cooling channel exchanges heat with the material in the drop steel pipe, and the heated air is discharged from the hot air outlet. The upper and lower material level limits are used to control the maximum and minimum height of the clay to be cooled above the drop steel pipes, respectively, ensuring that the height of the clay to be cooled above all drop steel pipes is approximately the same, thus forming a stable material pressure inside the equipment. The pressure equalization module is used to equalize the material resistance in each drop steel pipe, thereby ensuring that the material flow velocity in each drop steel pipe is equal, thus ensuring balanced heat exchange.

[0060] As can be seen from the above embodiments, the vertical heat exchanger for clay cooling of this application not only improves the material pressure stability in the clay cooling equipment and the cooling efficiency of calcined clay, but also avoids equipment failure caused by thermal expansion and contraction of the discharge steel pipe, thereby extending the service life of the equipment.

[0061] In this invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or in place of features of other embodiments.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, various modifications and variations can be made to the embodiments of the present invention. For example, the system disclosed in this application is a two-stage waste heat recovery device connected in series; in other embodiments, it can also be changed to a three-stage or more-stage waste heat recovery device connected in series. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertical heat exchanger for cooling clay, characterized in that, The vertical heat exchanger includes: A housing having a deformable portion that can extend and retract along its axial direction, a feed inlet at the top of the housing, a discharge outlet at the bottom of the housing, a cooling medium inlet and a hot air outlet on the side wall of the housing, the hot air outlet being located at the end of the housing near the feed inlet, and the cooling medium inlet being located at the end of the housing near the discharge outlet; Both the top perforated plate and the bottom perforated plate are located inside the housing, and both the top perforated plate and the bottom perforated plate have multiple through holes. The top perforated plate and the bottom perforated plate are parallel to each other, and the top perforated plate is located between the hot air outlet and the feed inlet, while the bottom perforated plate is located between the cooling medium inlet and the discharge outlet. Multiple blanking steel pipes are located inside the housing, and both ends of each blanking steel pipe are connected to corresponding through holes on the top perforated plate and corresponding through holes on the bottom perforated plate, respectively. The baffle assembly includes a plurality of first air guide baffles and a plurality of second air guide baffles. The plurality of first air guide baffles and the plurality of second air guide baffles are all located between the top perforated plate and the bottom perforated plate. The plurality of first air guide baffles and the plurality of second air guide baffles are spaced apart and staggered along the axial direction of the housing. Each first air guide baffle and each second air guide baffle is provided with a through hole for the material discharge steel pipe to pass through. The first air guide baffle extends horizontally from the first side wall of the housing toward the second side wall opposite to the first side wall. The second air guide baffle extends horizontally from the second side wall of the housing toward the first side wall. There is a first gap between the end of the first air guide baffle and the second side wall, and there is a second gap between the end of the second air guide baffle and the first side wall. The S-shaped cooling channel is connected to the cooling medium inlet and the hot air outlet at both ends, respectively. The S-shaped cooling channel includes the first gap, the second gap, and the third gap between two adjacent air guide baffles.

2. The vertical heat exchanger for clay cooling according to claim 1, characterized in that, The housing includes a detachably connected upper housing and a lower housing, the deformable portion is located on the lower housing, and the bottom end of the upper housing has a support ring seat for supporting the vertical heat exchanger.

3. The vertical heat exchanger for clay cooling according to claim 2, characterized in that, The deformable part includes a flexible shell segment and an elastic component disposed on the outer periphery of the flexible shell segment. The elastic component is compressed and released synchronously with the expansion and contraction of the flexible shell segment.

4. The vertical heat exchanger for clay cooling according to claim 3, characterized in that, The elastic component includes a first spring and a second spring. The top outer periphery and bottom outer periphery of the flexible shell section are respectively provided with an upper fixing plate and a lower fixing plate. The first spring is located between the upper fixing plate and the lower fixing plate, and the second spring is located on top of the upper fixing plate.

5. The vertical heat exchanger for clay cooling according to claim 1, characterized in that, The vertical heat exchanger includes a material distribution device, which includes a rotary drive component and a material distribution disc. The rotary drive component is disposed above the top side wall of the housing, and the material distribution disc is located inside the housing and at the bottom of the feed inlet. The material distribution disc is connected to the output end of the rotary drive component so that the rotary drive component drives the material distribution disc to rotate.

6. The vertical heat exchanger for clay cooling according to claim 5, characterized in that, The material distribution tray includes an outer ring shell, multiple partitions, and a shaft. The multiple partitions are arranged radially along the outer ring shell, and the middle surface of each partition coincides with the central axis of the outer ring shell. The shaft is located on one side of the outer ring shell, and the axis of the shaft is collinear with the central axis of the outer ring shell.

7. The vertical heat exchanger for clay cooling according to claim 6, characterized in that, The vertical heat exchanger also includes a filter screen, which is located inside the housing and between the material distribution plate and the top perforated plate.

8. The vertical heat exchanger for clay cooling according to claim 1, characterized in that, The vertical heat exchanger includes a pressure equalization module located between the bottom orifice plate and the outlet. The pressure equalization module includes multiple conical material equalization rings, each of which has a top opening and a bottom opening. The multiple conical material equalization rings are nested sequentially, with the sidewalls of two adjacent conical material equalization rings fixedly connected. The size of the top opening of the multiple conical material equalization rings increases sequentially from the inside to the outside, and there is a distance between the bottom openings of two adjacent conical material equalization rings.

9. The vertical heat exchanger for clay cooling according to claim 8, characterized in that, The vertical heat exchanger includes a rotary discharge valve, which is located below the discharge port.

10. The vertical heat exchanger for clay cooling according to any one of claims 1 to 9, characterized in that, The figure formed by connecting the midpoints of three adjacent through holes on the top and bottom perforated plates is an equilateral triangle; and / or, the blanking steel pipe is welded and sealed to both the top and bottom perforated plates.

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