A dry cooling device for reducing materials

Abstract

The application discloses a kind of reducing material dry method cooling device, including cooling cylinder, cooling water supply device, water vapor separation device, and be provided in evaporative section heat exchange device and superheating section heat exchange device in cooling cylinder, cooling water supply device, water vapor separation device, evaporative section heat exchange device and superheating section heat exchange device are sequentially connected, cooling water supply device sends cooling water to evaporative section heat exchange device, water vapor generated by evaporative section heat exchange device is separated after water vapor separation device and sends steam to superheating section heat exchange device, and hot gas generated by superheating section heat exchange device is sent to waste heat recovery system and is recycled.The reducing material dry method cooling device disclosed in the application sends cooling water into evaporative section heat exchange device by the cooling water supply device arranged, realizes heating from water to steam, after steam enters water vapor separation device, water, steam is separated in water vapor separation device, steam enters superheating section heat exchange device and is overheated, and the high-temperature steam generated can be directly entered into waste heat recovery system.

Description

Technical Field

[0001] This invention relates to the field of rotary kiln cooling technology, and in particular, to a dry cooling device for reducing materials. Background Technology

[0002] In rotary kiln production for direct reduction or solid waste disposal, the material discharged from the rotary kiln after calcination is generally at a high temperature, exceeding 1000℃. Current methods for cooling reducing materials typically employ direct water quenching, which makes waste heat difficult to recover and leads to environmental pollution, resource waste, and decreased product performance.

[0003] Therefore, it is necessary to propose a dry cooling device for reducing materials to alleviate the above-mentioned defects. Summary of the Invention

[0004] The present invention provides a dry cooling device for reducing materials, which solves the technical problems of water waste and environmental pollution caused by direct water cooling of reducing materials.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A dry cooling device for reducing materials includes a cooling cylinder, a cooling water supply device, a water vapor separator, and an evaporation section heat exchange device and a superheating section heat exchange device disposed within the cooling cylinder. The cooling water supply device, the water vapor separator, the evaporation section heat exchange device, and the superheating section heat exchange device are connected in sequence. The cooling water supply device delivers cooling water to the evaporation section heat exchange device. The water vapor generated in the evaporation section heat exchange device is separated into water and vapor by the water vapor separator and then delivered to the superheating section heat exchange device. The hot gas generated by the superheating section heat exchange device is delivered to a waste heat recovery system for recovery.

[0007] Furthermore, the cooling water supply device includes a water pump, a cooling water pipeline compensation device, a cooling water pipeline joint, and a cooling water inlet pipeline connected in sequence. The cooling water inlet pipeline is connected to the evaporation section heat exchange device to transport cooling water into the evaporation section heat exchange device.

[0008] Furthermore, the two ends of the water vapor separation device are connected to the steam inlet pipe and the water vapor outlet pipe through compensators and rotary joints, respectively.

[0009] Furthermore, both the evaporation section heat exchange device and the superheated section heat exchange device are spiral tubes.

[0010] Furthermore, it also includes a spiral guide plate disposed in the cooling cylinder, wherein the spiral guide plate is alternately arranged with the superheated section heat exchange device and the evaporation section heat exchange device.

[0011] Furthermore, the helical pitch of the helical guide plate is consistent with the pitch of the evaporation section heat exchange device and the superheated section heat exchange device.

[0012] Furthermore, the cooling water pipeline compensation device is a corrugated compensator.

[0013] Furthermore, the evaporation section heat exchange device is located in the low-temperature section of the cooling cylinder, and the superheating section heat exchange device is located in the high-temperature section of the cooling cylinder.

[0014] Furthermore, a driving device and a support device for supporting the cooling cylinder are provided on the outside of the cooling cylinder, and the driving device drives the cooling cylinder to rotate.

[0015] Furthermore, the cooling cylinder is provided with a protective gas pipe for introducing protective gas into its inner cylinder.

[0016] The present invention has the following beneficial effects:

[0017] The dry cooling device for reducing materials provided by this invention delivers cooling water to the evaporation section heat exchanger via a cooling water supply device, heating the water into steam. The steam then enters the water-vapor separation device, where water and steam are separated. The steam then enters the superheating section heat exchanger for superheating, and the resulting high-temperature steam can be directly fed into the waste heat recovery system. The evaporation section heat exchanger and the superheating section heat exchanger use an indirect water-cooling dry cooling method to lower the temperature of the high-temperature material, solving the problems of water waste and environmental pollution associated with water cooling or indirect water cooling of high-temperature reducing materials. Simultaneously, the waste heat generated during cooling is effectively recovered, improving energy reuse.

[0018] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the dry cooling device for reducing materials provided by the present invention;

[0021] Figure 2 for Figure 1 The diagram shows the internal structure of the dry cooling device for reducing materials.

[0022] Figure 3 for Figure 1 The diagram shows the structure of the chute. Detailed Implementation

[0023] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0026] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0027] Please refer to the following: Figure 1 and Figure 2 ,in, Figure 1 This is a schematic diagram of the external structure of the dry cooling device for reducing materials provided by the present invention; Figure 2 for Figure 1The diagram shows the internal structure of a dry cooling device for reducing materials. This dry cooling device is used to cool the high-temperature material discharged from the rotary kiln 200. The device includes a cooling cylinder 81, a cooling water supply device 83, a water vapor separator 85, and an evaporation section heat exchanger 87 and a superheated section heat exchanger 89 disposed within the cooling cylinder 81. The cooling water supply device 83, the water vapor separator 85, the evaporation section heat exchanger 87, and the superheated section heat exchanger 89 are connected sequentially. The cooling water supply device 83 delivers cooling water to the evaporation section heat exchanger 87. The water vapor generated in the evaporation section heat exchanger 87 is separated into water and steam by the water vapor separator 85 and then delivered to the superheated section heat exchanger 89. The hot air generated by the superheated section heat exchanger 89 is then delivered to a waste heat recovery system for recovery. Cooling water is supplied to the evaporation section heat exchanger 87 via the cooling water supply device 83, where water is heated to steam. The steam then enters the water-vapor separator 85, where water and steam are separated. The steam then enters the superheated section heat exchanger 89 for superheating, and the resulting high-temperature steam can be directly fed into the waste heat recovery system. High-temperature materials undergo dry cooling within the cooling cylinder 81 via the evaporation section heat exchanger 87 and the superheated section heat exchanger 89, solving the problems of water waste and environmental pollution associated with water cooling or indirect water cooling of high-temperature reducing materials. Simultaneously, the waste heat generated during cooling is effectively recovered, improving energy reuse.

[0028] The cooling water supply device 83 includes a water pump 831, a cooling water pipeline compensation device 833, a cooling water pipeline joint 835, and a cooling water inlet pipe 837 connected in sequence. The water pump 831 is used to pump cooling water, and the cooling water inlet pipe 837 is connected to the evaporation section heat exchange device 87. The water pump 831 delivers cooling water to the evaporation section heat exchange device 87.

[0029] Specifically, the cooling water pipeline compensation device 833 is a corrugated compensator. The cooling water pipeline compensator is used to compensate for pipeline displacement, making the pipeline connection more stable. The cooling water pipeline joint 835 is a rotary joint, used for rotating and sealing the pipeline.

[0030] The inlet of the water vapor separator 85 is connected to the outlet of the evaporation section heat exchanger 87 via a water vapor outlet pipe 811. The outlet of the water vapor separator 85 is connected to the inlet of the superheated section heat exchanger 89 via a steam inlet pipe 815. Specifically, cooling water enters the evaporation section heat exchanger 87 via the cooling water inlet pipe 837. The inlet of the water vapor outlet pipe 811 is connected to the outlet of the evaporation section heat exchanger 87, and the outlet of the water vapor outlet pipe 811 is connected to the inlet of the water vapor separator 85. The inlet of the steam inlet pipe 815 is connected to the outlet of the water vapor separator 85, and the outlet is connected to the inlet of the superheated section heat exchanger 89. The outlet of the superheated section heat exchanger 89 is connected to the steam outlet pipe 813, and the waste heat enters the waste heat recovery system via the steam outlet pipe 813. Specifically, the cooling process of the device is as follows: water pump 831 pumps cooling water through cooling water inlet pipe 837 to the evaporation section heat exchange device 87. The water vapor from the evaporation section heat exchange device 87 is then transported to the water vapor separator 85 through water vapor outlet pipe 811. The water vapor separator 85 separates the water and vapor, and then transports the steam through steam inlet pipe 815 to the superheated section heat exchange device 89. The hot air generated by the superheated section heat exchange device 89 enters the waste heat recovery system through the steam outlet channel. That is, water pump 831 → cooling water → cooling water inlet pipe 837 → evaporation section heat exchange device 87 → water vapor outlet pipe 811 → water vapor separator 85 → steam inlet pipe 815 → superheated section heat exchange device 89 → steam outlet pipe 813 → waste heat recovery system.

[0031] The two ends of the water vapor separator 85 are connected to the steam inlet pipe 815 and the water vapor outlet pipe 811 respectively through the compensator 851 and the rotary joint 853. It is used to separate the water vapor delivered from the evaporation section heat exchange device 87 and then deliver the steam to the superheated section heat exchange device 89 through the steam inlet pipe 815.

[0032] Specifically, the compensator is a bellows compensator used to compensate for pipeline displacement, making the pipeline connection more stable. The rotary joint is a rotary head used for rotating and sealing the pipeline.

[0033] Please see Figure 2 Specifically, in this embodiment, both the evaporation section heat exchanger 87 and the superheated section heat exchanger 89 are spiral tubes. The spiral tubes are wound around the inner wall of the cooling cylinder 81. Specifically, the evaporation section heat exchanger 87 is an evaporation section spiral heat exchanger tube, and the superheated section heat exchanger 89 is a transition section spiral heat exchanger tube.

[0034] In another embodiment, the dry cooling device for reducing materials further includes a spiral guide plate 82 disposed within the cooling cylinder 81, wherein the spiral guide plate is alternately arranged with the superheated section heat exchange device 89 and the evaporation section heat exchange device 87. The spiral guide plate can guide the flow of high-temperature materials and increase heat exchange efficiency.

[0035] The spiral pitch of the spiral guide plate 82 is consistent with the pitch of the evaporation section heat exchange device 87 and the superheated section heat exchange device 89, so as to form cooling at equal intervals and make the cooling more uniform.

[0036] Preferably, in this embodiment, the compensator is a corrugated compensator.

[0037] Since the evaporation section requires a low temperature while the superheating section requires a high temperature, the heat exchange device 87 for the evaporation section is located in the low-temperature section of the cooling cylinder 81, and the heat exchange device 89 for the superheating section is located in the high-temperature section of the cooling cylinder 81. The high-temperature material inlet section of the cooling cylinder 81 is the high-temperature section.

[0038] High-temperature material enters the cooling cylinder 81 through a chute, where it undergoes indirect heat exchange with the spiral evaporation section heat exchanger 87 and the transition section heat exchanger located within the cooling cylinder 81. This forms a dry cooling method, eliminating the need for direct water quenching or indirect water cooling. The cooling cylinder 81 is externally equipped with a drive device 84 and a support device 86. The drive device 84 rotates the cooling cylinder 81, causing the high-temperature material to move from the inlet end to the outlet end, completing the cooling process in the process.

[0039] Preferably, the cooling cylinder 81 is provided with a protective gas pipe 816 for introducing a protective gas into its inner cylinder. Specifically, the protective gas is nitrogen.

[0040] The chute 900 is connected at both ends to a rotary kiln 200 and a dry cooling device 800 for reducing materials, respectively. It is used to pre-cool the high-temperature material discharged from the outlet of the rotary kiln 200 before it enters the dry cooling device 800 for further cooling. Because the rotary kiln 200 discharges high-temperature material, and may even discharge liquid material, which can cause adhesion or blockage, a cooling system is needed. The chute pre-cools the high-temperature material entering the dry cooling device.

[0041] The chute 900 includes a feed inlet 10, a cooling channel 11, a large-piece discharge channel 13, and a discharge port 15 connected in sequence, as well as a material detection device 17 disposed within the large-piece discharge channel 13. The feed inlet 10 is connected to the rotary kiln 200. Material is discharged from the feed inlet 10 to the large-piece discharge channel 13 after being cooled by the cooling channel 11. The large-piece discharge channel 13 is connected to the discharge port 15. Under normal circumstances, when the material is in small pieces, it is discharged from the discharge port 15 through the large-piece discharge channel 13. The material detection device 17 is used to detect whether the volume of the high-temperature material in the chute exceeds a preset range. If the result is yes, the discharge port 16 at the large-piece discharge channel 13 is opened, and the material is discharged through the discharge port 16. If the result is no, the material is discharged through the large-piece discharge channel 13 and the discharge port 15 in sequence to the dry cooling device for reducing materials. The refrigeration channel 11 allows for rapid condensation of high-temperature materials entering the channel before they enter the dry cooling device for reducing materials. This rapid and effective cooling is particularly beneficial when the high-temperature material is in a liquid phase. Cooling effectively prevents the material from adhering to the chute, thus reducing chute blockage. Large pieces of material generated during the cooling process are detected by the material detection device 17 and effectively sorted. When the volume of the high-temperature material exceeds a preset threshold in the detection system, the discharge port at the large piece discharge channel 13 opens to prevent large pieces from entering and blocking the discharge port 15, further preventing chute blockage and improving material cooling efficiency.

[0042] The feed inlet 10 is located below the kiln opening (high-temperature material outlet) of the rotary kiln 200. The top of the feed inlet 10 is arc-shaped to match the shape of the rotary kiln. The opening is wide on both sides in a supporting manner, which can catch all the high-temperature material falling down and prevent it from spilling. Of course, in other embodiments, when the kiln opening of the rotary kiln has other irregular shapes, the shape of the feed inlet 10 can be matched according to its shape.

[0043] The cooling channel 11 includes a connected wear-resistant and heat-resistant section 111 and a rapid cooling section 113. The wear-resistant and heat-resistant section 111 is connected to the feed inlet 10. The wear-resistant and heat-resistant section 111 is a wear-resistant and heat-resistant chute, which includes a stacked wear-resistant layer and a heat-insulating layer. The wear-resistant layer or the heat-insulating layer is in contact with the high-temperature material.

[0044] The rapid cooling section 113 includes a rapid cooling slide plate 115 and refrigeration pipes 117 disposed on the rapid cooling slide plate 115. The refrigeration pipes 117 are arranged above the rapid cooling slide plate 115 and are curved into an S-shaped curve with the pipes closely fitting together, so as to increase the cooling effect by laying more pipes in the same area.

[0045] It should be noted that, in order to ensure that the material exiting the rotary kiln smoothly enters the cooling channel 11, the heights of the wear-resistant and heat-resistant section 111 and the quenching section 113 are set to be equal to the diameter of the rotary kiln opening.

[0046] Preferably, in this embodiment, cooling water flows through the refrigeration pipe 117. The refrigeration pipe 117 is connected to a water pump, which pumps cooling water from the cooling pool to the refrigeration pipe 117. The cooling water is then transported through the refrigeration pipe 117 to the rapid cooling section 113. When the high-temperature material is discharged from the refrigeration channel 11, it enters the rapid cooling section 113 for rapid cooling, thus achieving the purpose of rapid cooling of the material. It should be noted that the cooling water flowing through the refrigeration pipe 117 can be municipal water supplied from a municipal pipeline, or it can be cooling water that has been cooled by a dry cooling device for reducing materials. Of course, in other embodiments, other refrigerants or other cooling substances can also be introduced into the refrigeration pipe 117.

[0047] The large-piece discharge channel 13 is connected to the quench section 113. The large-piece discharge channel 13 includes a movable slide 131 rotatably connected to the discharge port 16, and a winding device 133 connected to the movable slide 131 for controlling its movement. The movable slide 131 opens or closes the discharge port 16 under the control of the winding device 133. It should be noted that the movable slide 131 is installed within the channel via a rotating shaft, and the movable slide 131 rotates around the rotating shaft 132.

[0048] Specifically, in this embodiment, the winding device 133 is a winch, and the winch's pull rope is connected to the movable slide 131 to drive the movable slide 131 to rotate and control its opening and closing. The movable slide 131 is located at the discharge port 16. When the winch's pull rope is lowered, the movable slide 131 rotates counterclockwise to open the discharge port 16, allowing large pieces of high-temperature material to be discharged from the discharge port 16 and fall into the large material processing pool. After the large material is discharged, the winch's pull rope is wound up, and the movable slide 131 rotates clockwise to reset.

[0049] The material detection device 17 is installed within the large material discharge channel 13. The material detection device 17 is either a level switch or a limit switch. The material detection device 17 feeds back detection information to the control system, which then controls the winding device 133 (winch) to move. The winding device 133 unwinds and rewinds the pull rope, causing the movable slide 131 to rotate and control the opening and closing of the discharge port 15. Specifically, when the material detection device 17 detects large pieces of material entering the large material discharge channel 13, it feeds back the detected material information to the control system. The control system then controls the winch to lower its pull rope, causing the movable slide 131 to rotate counterclockwise and open the discharge port 16. Large, hot materials are discharged from the discharge port 16 and fall into the large material processing pool, completing the discharge of large materials. When the material detection device 17 no longer detects large pieces of material, the winch rewinds its pull rope, and the movable slide 131 rotates clockwise to reset.

[0050] In another embodiment, the chute 900 further includes a kiln inlet chute 19 disposed at the discharge port 15, the kiln inlet chute 19 being disposed immediately adjacent to the movable chute 131.

[0051] The dry cooling device for reducing materials provided in this embodiment of the invention delivers cooling water to the evaporation section heat exchanger 87 via a cooling water supply device 83, thereby heating water into steam. The steam then enters the water-vapor separation device 85, where water and steam are separated. The steam then enters the superheating section heat exchanger 89 for superheating, and the resulting high-temperature steam can be directly fed into the waste heat recovery system. The evaporation section heat exchanger 87 and the superheating section heat exchanger 89 cool the high-temperature material using an indirect water-cooling dry cooling method, solving the problems of water waste and environmental pollution associated with water cooling or indirect water cooling of high-temperature reducing materials. Simultaneously, the waste heat generated during cooling is effectively recovered, improving energy reuse.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dry cooling device for reducing materials, characterized in that, The system includes a cooling cylinder, a cooling water supply device, a water vapor separator, and an evaporation section heat exchanger and a superheating section heat exchanger disposed within the cooling cylinder. The cooling water supply device, the water vapor separator, the evaporation section heat exchanger, and the superheating section heat exchanger are connected sequentially. The cooling water supply device delivers cooling water to the evaporation section heat exchanger. Water vapor generated within the evaporation section heat exchanger is separated into water and vapor by the water vapor separator, and the resulting steam is delivered to the superheating section heat exchanger. The hot air generated by the superheating section heat exchanger is sent to a waste heat recovery system for recovery. The cooling cylinder is externally equipped with a drive device and a support device for supporting the cooling cylinder. The drive device drives the cooling cylinder to rotate. High-temperature materials enter the cooling cylinder through a chute and indirectly exchange heat with the evaporation section heat exchange device and the superheating section heat exchange device located inside the cooling cylinder, thereby forming a dry cooling method. The chute is connected to a rotary kiln and a dry cooling device for reducing materials at both ends, respectively. It is used to transport the high-temperature material discharged from the outlet of the rotary kiln to the dry cooling device for reducing materials for pre-cooling. The chute includes a feed inlet, a cooling channel, a large-piece discharge channel and a discharge outlet connected in sequence, as well as a material detection device located in the large-piece discharge channel. The feed inlet is connected to the rotary kiln. The material is discharged from the feed inlet to the large-piece discharge channel after being cooled by the cooling channel. The large-piece discharge channel is connected to the discharge outlet. The material detection device is used to detect whether the volume of the high-temperature material in the chute exceeds a preset range. If the result is yes, the discharge outlet at the large-piece discharge channel is opened and the material is discharged through the discharge outlet. If the result is no, the material is discharged to the dry cooling device for reducing materials through the large-piece discharge channel and the discharge outlet in sequence.

2. The dry cooling apparatus for reducing materials according to claim 1, characterized in that, The cooling water supply device includes a water pump, a cooling water pipeline compensation device, a cooling water pipeline joint, and a cooling water inlet pipe connected in sequence. The cooling water inlet pipe is connected to the evaporation section heat exchange device to transport cooling water into the evaporation section heat exchange device.

3. The dry cooling apparatus for reducing materials according to claim 1, characterized in that, The steam-water separator is connected to a steam inlet pipe and a steam-water outlet pipe at both ends via a compensator and a rotary joint, respectively.

4. The dry cooling apparatus for reducing materials according to claim 1, characterized in that, Both the evaporation section heat exchanger and the superheated section heat exchanger are spiral tubes.

5. The dry cooling apparatus for reducing materials according to claim 4, characterized in that, It also includes a spiral guide plate disposed in the cooling cylinder, wherein the spiral guide plate is alternately arranged with the superheated section heat exchange device and the evaporation section heat exchange device.

6. The dry cooling apparatus for reducing materials according to claim 5, characterized in that, The pitch of the spiral guide plate is consistent with the pitch of the evaporation section heat exchange device and the superheated section heat exchange device.

7. The dry cooling apparatus for reducing materials according to claim 2, characterized in that, The cooling water pipeline compensation device is a corrugated compensator.

8. The dry cooling apparatus for reducing materials according to claim 1, characterized in that, The evaporation section heat exchange device is located in the low-temperature section of the cooling cylinder, and the superheating section heat exchange device is located in the high-temperature section of the cooling cylinder.

9. The dry cooling apparatus for reducing materials according to claim 1, characterized in that, The cooling cylinder is equipped with a protective gas pipe that introduces protective gas into its inner cylinder.

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