Double-waterway combined type high-temperature material gradient cooling equipment

Abstract

The invention discloses double-water-path combined type high-temperature material gradient cooling equipment, and relates to the field of high-temperature material cooling and waste heat recovery. According to the equipment, an original two-stage independent roller cooling machine is integrated, independent circulation of two paths of cooling water is achieved through a two-inlet two-return double-return rotary joint and a water distribution pipe assembly, waste heat is recycled through a high-temperature water path, deep cooling is achieved through a low-temperature water path, and the water distribution pipe assembly is provided with a bellow expansion joint and a sliding sleeve supporting ring for compensating thermal expansion. And the internal heat exchange tube row is embedded in the material to improve the heat exchange efficiency. The two-stage cooling system overcomes the defects that an existing two-stage cooling system is large in occupied area, high in cost and low in reliability, high-temperature material gradient cooling and waste heat recovery are achieved, and the two-stage cooling system has the advantages of saving space, reducing cost and improving reliability.

Description

Technical Field

[0001] This invention belongs to the field of wooden pallet processing technology, specifically, it relates to a dual-water-path composite high-temperature material gradient cooling device. Background Technology

[0002] Industries such as metallurgy, chemicals, steel mills, non-ferrous metal smelting, and thermal power generation generate large quantities of materials, ores, and chemical raw materials that require high-temperature calcination equipment for calcination treatment and subsequent extraction of relevant components. Calcination equipment includes rotary kilns, rotary hearth furnaces, blast furnaces, and hot blast stoves. The refined slag and finished materials require cooling, conveying, and storage processes. Currently, the cooling processes for these high-temperature materials, apart from the traditional water quenching method, generally require drum coolers.

[0003] Currently, there are two main types of drum coolers on the market: 1. External spray type: High-temperature materials are conveyed forward inside the drum cooler by the rotation and pushing of the equipment. Cooling water is sprayed directly onto the outer wall of the cooler drum. The temperature of the high-temperature materials inside the drum is reduced through heat exchange between the cold water and the drum. In this process, most of the water evaporates into steam and is directly and unorganizedly released into the atmosphere, creating white pollution and adversely affecting the environment. At the same time, the evaporated water and the heat carried away by the high-temperature materials are wasted, and the equipment suffers severe oxidation and corrosion due to long-term water erosion.

[0004] 2. Closed-loop cooling machine: This cooling machine adopts a closed-loop water circulation design, which prevents the generation of water vapor during circulation and minimizes water loss, thus effectively solving the drawbacks of external spray type cooling machines.

[0005] Regardless of the cooling method used, the heat exchanged between the cooling water and the high-temperature material will be wasted when cooling high-temperature materials are cooled. If this waste heat resource can be recovered and utilized, it can not only save energy and reduce carbon dioxide emissions, but also protect the environment and reduce thermal pollution, which is of great significance to the energy conservation and efficiency improvement of enterprises.

[0006] Currently, commercially available high-temperature material cooling and waste heat recovery systems mainly utilize the high-temperature hot water generated by drum coolers during the cooling of high-temperature materials to produce low-pressure saturated steam. Since the pressure of the produced saturated steam is approximately 0.5-1.0 MPa, the saturated water temperature at this pressure is 150-180℃, meaning the high-temperature return water temperature of the drum cooler is 170-195℃. However, to generate such high-temperature hot water, from a heat transfer perspective, the discharge temperature needs to be approximately 50-60℃ higher than the discharge water temperature to achieve temperature and pressure conduction. Therefore, the discharge temperature of the drum cooler for cooling high-temperature materials needs to be ≥250℃. In actual production, however, materials typically need to be cooled to below 100℃ before being conveyed to the next processing stage.

[0007] In order to recover the waste heat of high-temperature materials to produce low-pressure saturated steam while cooling the high-temperature materials to below 100°C to meet the conditions of the next processing stage, it is necessary to set up a two-stage cooling system. That is, after the high-temperature materials are cooled to about 250°C by the first-stage drum cooler, they enter the second-stage drum cooler to be further cooled to below 100°C, and then sent to the next processing stage by the next-stage conveying equipment.

[0008] The above-mentioned high-temperature material cooling and waste heat recovery system has the following shortcomings: 1. Since two-stage drum coolers need to be installed, and since the two-stage drum coolers are spatially hierarchical, the site needs to be excavated for installation. If both drum coolers are installed below the zero-meter level, plus the conveying equipment below the secondary drum cooler, a deep trench needs to be excavated to meet the system layout requirements. Therefore, the required site space is extremely large, which also increases the initial investment of the system.

[0009] 2. The two-stage equipment needs to be driven separately, which consumes a lot of energy. Since both stages are rotating equipment, relevant vulnerable parts need to be replaced regularly, resulting in high maintenance costs.

[0010] 3. If either of the two-stage devices fails, the entire system must be shut down for maintenance, resulting in relatively low overall system reliability.

[0011] In view of this, the present invention is proposed. Summary of the Invention

[0012] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A dual-water-path composite high-temperature material gradient cooling system includes: The system includes a feeding device, a primary cooling cylinder, a secondary cooling cylinder, and an outlet device. The feeding device is connected to the inlet end of the primary cooling cylinder, and the outlet device is connected to the outlet end of the secondary cooling cylinder. The primary cooling cylinder and the secondary cooling cylinder are connected in sequence. Both the primary and secondary cooling cylinders are equipped with spiral blade assemblies and internal heat exchange tube arrays.

[0013] In a preferred embodiment of the present invention, a drive mechanism and a cylinder rotation support system are provided on the outer side of the primary cooling cylinder and the secondary cooling cylinder.

[0014] In a preferred embodiment of the present invention, the discharge end of the secondary cooling cylinder is connected to a water distribution device, which includes a double-pass rotary joint and a water distribution pipe assembly. The water distribution pipe assembly passes through the primary cooling cylinder and the secondary cooling cylinder and is connected to the internal heat exchange tube bank.

[0015] In a preferred embodiment of the present invention, the water distribution pipe assembly is provided with a corrugated expansion joint and a sliding sleeve support ring. The sliding sleeve support ring includes a rubber sliding sleeve and a support rod. The rubber sliding sleeve is sleeved on the outside of the water distribution pipe assembly, and the support rod connects the rubber sliding sleeve and the outer ring of the sliding sleeve support ring.

[0016] In a preferred embodiment of the present invention, the double-pass rotary joint has a two-inlet and two-outlet structure, which is used to allow two cooling water streams to enter the internal heat exchange tube bank of the primary cooling cylinder and the secondary cooling cylinder respectively.

[0017] In a preferred embodiment of the present invention, the driving mechanism is a variable frequency motor, used to adjust the speed of the equipment according to the amount of material.

[0018] In a preferred embodiment of the present invention, the number of support rods of the sliding sleeve support ring is three, which are evenly distributed along the circumference of the rubber sliding sleeve.

[0019] In a preferred embodiment of the present invention, the primary cooling cylinder adopts a tubular structure, and the secondary cooling cylinder adopts a shell-and-tube structure.

[0020] In a preferred embodiment of the present invention, the internal heat exchange tubes are embedded in the material during equipment operation and come into direct contact with the high-temperature material.

[0021] Compared with the prior art, the present invention has the following advantages: This invention integrates two independent cooling units into one unit, eliminating the need for deep trenches and significantly saving space and initial investment. A single unit replaces two units, reducing drive energy consumption and maintenance costs for vulnerable components. It avoids the risk of complete machine shutdown due to single-stage failure, significantly improving operational stability. The internal heat exchange tubes are embedded in the material, enhancing heat exchange efficiency. The dual-pass rotary joint ensures independent circulation of the two cooling water streams, eliminating the risk of crossflow.

[0022] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0023] In the attached diagram: Figure 1 : Structural composition diagram of the present invention Figure 2 Water distribution device structural diagram Figure 3 Structural diagram of the sliding sleeve support device Figure 4 Enlarged view of the sliding sleeve support device Figure 5 Cross-sectional view of the primary cooling cylinder Figure 6 Cross-sectional view of the secondary cooling cylinder Figure 7 : Structure diagram of double-pass rotary joint Figure 8 Internal heat exchanger tube bank structure diagram Figure 9 This is a diagram of an existing gradient cooling device for high-temperature materials.

[0024] In the diagram: 1. Feeding device; 2. Spiral blade assembly; 3. Internal heat exchange tube bank; 4. Primary cooling cylinder; 5. Drive mechanism; 6. Secondary cooling cylinder; 7. Cylinder rotation support system; 8. Outlet device; 9. Water distribution device; 901. Double-pass rotary joint; 902. Water distribution pipe assembly; 9021. Corrugated expansion joint; 9022. Slip sleeve support ring; 90221. Support rod; 90222. Rubber slip sleeve. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0026] A dual-water-path composite high-temperature material gradient cooling system includes: The system includes a feeding device 1, a primary cooling cylinder 4, a secondary cooling cylinder 6, and an outlet device 8. The feeding device 1 is connected to the feeding end of the primary cooling cylinder 4, and the outlet device 8 is connected to the discharging end of the secondary cooling cylinder 6. The primary cooling cylinder 4 and the secondary cooling cylinder 6 are connected in sequence. Both the primary cooling cylinder 4 and the secondary cooling cylinder 6 are equipped with spiral blade assemblies 2 and internal heat exchange tube arrays 3.

[0027] Furthermore, a drive mechanism 5 and a cylinder rotation support system 7 are configured on the outer side of the primary cooling cylinder 4 and the secondary cooling cylinder 6.

[0028] Furthermore, the discharge end of the secondary cooling cylinder 6 is connected to a water distribution device 9, which includes a double-pass rotary joint 901 and a water distribution pipe assembly 902. The water distribution pipe assembly 902 passes through the primary cooling cylinder 4 and the secondary cooling cylinder 6 and is connected to the internal heat exchange tube bank 3.

[0029] Furthermore, the water distribution pipe assembly 902 is provided with a corrugated expansion joint 9021 and a sliding sleeve support ring 9022. The sliding sleeve support ring 9022 includes a rubber sliding sleeve 90222 and a support rod 90221. The rubber sliding sleeve 90222 is sleeved on the outside of the water distribution pipe assembly 902, and the support rod 90221 connects the rubber sliding sleeve 90222 and the outer ring of the sliding sleeve support ring 9022.

[0030] Furthermore, the double-pass rotary joint 901 has a two-inlet, two-outlet structure, which allows two cooling water streams to enter the internal heat exchange tube array 3 of the primary cooling cylinder 4 and the secondary cooling cylinder 6 respectively; the drive mechanism 5 is a variable frequency motor, which is used to adjust the equipment speed according to the amount of material.

[0031] Furthermore, the number of support rods 90221 of the sliding sleeve support ring 9022 is three, which are evenly distributed around the circumference of the rubber sliding sleeve 90222; the primary cooling cylinder 4 adopts a tube-type structure, and the secondary cooling cylinder 6 adopts a shell-and-tube structure; the internal heat exchange tube row 3 is embedded in the material during equipment operation and comes into direct contact with the high-temperature material.

[0032] The implementation principle of the dual-water-path composite high-temperature material gradient cooling device of the present invention is as follows: High-temperature material at approximately 1200°C enters the primary cooling cylinder 4 through the feeding device 1. The drive mechanism 5 rotates the cylinder, and the spiral vane assembly 2 conveys the material to the discharge end. The internal heat exchange tubes 3 are embedded in the material, directly exchanging heat with the high-temperature material to cool it to approximately 260°C. The material then enters the secondary cooling cylinder 6, where it is further cooled to below 100°C by the internal heat exchange tubes 3, and finally enters the downstream conveying equipment through the outlet device 8.

[0033] Water circulation process: High temperature water waste heat recovery: The 150-180℃ high temperature and high pressure water from the steam generator enters the water distribution device 9 through interface N1, and enters the internal heat exchange tube bank 3 of the first-stage cooling cylinder 4 through the water distribution pipe assembly 902. After absorbing the heat of the material, it becomes 170-200℃ high temperature and high pressure water, and returns to the steam generator through interface N2 to flash steam to produce saturated steam. The water temperature drops back to about 150℃ and circulates. Low-temperature water deep cooling: The ambient temperature cooling water of the cooling tower enters the water distribution device 9 through interface N3, and enters the internal heat exchange tube row 3 of the secondary cooling cylinder 6 through the water distribution pipe assembly 902. After absorbing the heat of the material, it becomes hot water at about 80°C, and returns to the cooling tower for cooling and circulation through interface N4.

[0034] Pipeline compensation mechanism: The corrugated expansion joint 9021 on the water distribution pipe assembly 902 cooperates with the sliding sleeve support ring 9022 to compensate for the thermal expansion of the pipeline caused by high temperature; the rubber sliding sleeve 90222 is fitted on the outside of the water distribution pipe, and the support rod 90221 connects the sliding sleeve and the outer ring, which both supports the pipeline and allows the pipeline to slide relative to each other. Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 dual-water-path composite high-temperature material gradient cooling device, characterized in that, include: The system includes a feeding device (1), a primary cooling cylinder (4), a secondary cooling cylinder (6), and an outlet device (8). The feeding device (1) is connected to the feeding end of the primary cooling cylinder (4), and the outlet device (8) is connected to the discharging end of the secondary cooling cylinder (6). The primary cooling cylinder (4) and the secondary cooling cylinder (6) are connected in sequence. Both the primary cooling cylinder (4) and the secondary cooling cylinder (6) are equipped with spiral blade assemblies (2) and internal heat exchange tube arrays (3).

2. The dual-water-path composite high-temperature material gradient cooling device according to claim 1, characterized in that, The primary cooling cylinder (4) and the secondary cooling cylinder (6) are equipped with a drive mechanism (5) and a cylinder rotation support system (7) on their outer sides.

3. The dual-water-path composite high-temperature material gradient cooling device according to claim 1, characterized in that, The discharge end of the secondary cooling cylinder (6) is connected to a water distribution device (9). The water distribution device (9) includes a double-pass rotary joint (901) and a water distribution pipe assembly (902). The water distribution pipe assembly (902) passes through the primary cooling cylinder (4) and the secondary cooling cylinder (6) and is connected to the internal heat exchange tube bank (3).

4. The dual-water-path composite high-temperature material gradient cooling device according to claim 1, characterized in that, The water distribution pipe assembly (902) is provided with a corrugated expansion joint (9021) and a sliding sleeve support ring (9022). The sliding sleeve support ring (9022) includes a rubber sliding sleeve (90222) and a support rod (90221). The rubber sliding sleeve (90222) is sleeved on the outside of the water distribution pipe assembly (902), and the support rod (90221) connects the rubber sliding sleeve (90222) and the outer ring of the sliding sleeve support ring (9022).

5. The dual-water-path composite high-temperature material gradient cooling device according to claim 1, characterized in that, The double-pass rotary joint (901) has a two-inlet and two-outlet structure, which is used to allow two cooling water streams to enter the internal heat exchange tube bank (3) of the primary cooling cylinder (4) and the secondary cooling cylinder (6) respectively.

6. The dual-water-path composite high-temperature material gradient cooling device according to claim 1, characterized in that, The drive mechanism (5) is a variable frequency motor, used to adjust the speed of the equipment according to the amount of material.

7. The dual-water-path composite high-temperature material gradient cooling device according to claim 1, characterized in that, The number of support rods (90221) of the sliding sleeve support ring (9022) is three, which are evenly distributed along the circumference of the rubber sliding sleeve (90222).

8. The dual-water-path composite high-temperature material gradient cooling device according to claim 1, characterized in that, The primary cooling cylinder (4) adopts a tubular structure, and the secondary cooling cylinder (6) adopts a shell-and-tube structure.

9. The dual-water-path composite high-temperature material gradient cooling device according to claim 1, characterized in that, The internal heat exchange tube bank (3) is embedded in the material during equipment operation and comes into direct contact with the high-temperature material.

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