Cooling system and dehydration equipment

Abstract

The utility model provides a cooling system and dehydration equipment, and relates to the technical field of rotary kiln cooling. The cooling system comprises a cooling kiln, a spraying device, a circulating device and a cooling device; the cooling kiln comprises a shell and a barrel penetrating through the shell, the barrel is provided with a feeding end and a discharging end, and a plurality of cavities are formed between the inner wall of the shell and the outer wall of the barrel; the spraying device comprises spray head assemblies arranged in the multiple cavities correspondingly. The circulating device enables the cooling liquid to flow between the two adjacent cavities in the direction opposite to the material conveying direction; the cooling device is provided with a liquid return end and a liquid outlet end, the liquid return end is connected with the bottom of the cavity adjacent to the feeding end, and the liquid outlet end is connected with the spray head assembly in the cavity adjacent to the discharging end. According to the cooling system, multi-stage countercurrent spraying cooling can be achieved, the cooling liquid and the barrel body are subjected to heat exchange for multiple times, the temperature difference between the cooling liquid and materials is always kept within a certain range, the heat exchange efficiency is higher, and the water consumption is lower under the condition that the same cooling effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of rotary kiln cooling, and particularly to a cooling system and a dehydration device. Background Art

[0002] Ferric phosphate is the only precursor of lithium iron phosphate cathode material. In the production process of ferric phosphate, ferric phosphate dihydrate is usually produced through a synthesis reaction first, and then the anhydrous ferric phosphate product can be obtained after drying and dehydration. Therefore, the dehydration process is an essential step in the manufacturing process of ferric phosphate products.

[0003] Currently, the most widely used dehydration device in the ferric phosphate industry is the rotary kiln. By setting a sufficiently high temperature, the ferric phosphate dihydrate material is fully calcined in the kiln to remove two bound waters. The calcined ferric phosphate often has a relatively high temperature, reaching above 200°C, and the material must be cooled before entering the backend powder system.

[0004] The cooling method of the rotary kiln is mainly water cooling. Traditional water cooling is to connect a spray pipe above the cooling kiln to cover and continuously spray the whole cooling kiln. This cooling method requires continuous spraying of a large amount of circulating cooling water to play a role in cooling, with a low cooling efficiency and a huge water consumption. Summary of the Utility Model

[0005] In view of this, the purpose of the present application is to provide a cooling system and a dehydration device, aiming to solve the technical problems of low cooling efficiency and huge water consumption in the prior art.

[0006] To achieve the above purpose, the technical solution adopted in the present application is as follows:

[0007] In the first aspect, an embodiment of the present application provides a cooling system, and the cooling system includes:

[0008] A cooling kiln, including a shell and a cylinder body penetrating through the shell, the cylinder body having a feed end and a discharge end, the cylinder body being used for conveying materials, and a plurality of chambers being formed between the inner wall of the shell and the outer wall of the cylinder body, and the plurality of chambers being arranged along the length direction of the cylinder body;

[0009] A spraying device, including a nozzle assembly respectively arranged in a plurality of the chambers;

[0010] A circulating device, connecting the bottom of the chamber and the nozzle assembly in the adjacent chamber, so that the coolant flows between the adjacent two chambers in a direction opposite to the material conveying direction;

[0011] A cooling device, having a liquid return end and a liquid outlet end, the liquid return end is connected to the bottom of the chamber adjacent to the feeding end, and the liquid outlet end is connected to the spray head assembly in the chamber adjacent to the discharging end.

[0012] In one embodiment of the first aspect, a first barrier is provided on the inner wall of the housing, the first barrier surrounds the cylinder and is in clearance fit with the cylinder, and the first barrier divides the cavity between the housing and the cylinder to form the plurality of chambers.

[0013] In one embodiment of the first aspect, a second barrier is provided on the outer wall of the cylinder, the second barrier surrounds the cylinder and is in clearance fit with the housing, and the second barrier is adjacent to the first barrier.

[0014] In one embodiment of the first aspect, the spraying device further includes a regulating valve, and the liquid outlet end is connected to the spray head assembly in the chamber adjacent to the discharging end through the regulating valve;

[0015] A temperature sensor is provided at the discharging end, and the temperature sensor is electrically connected to the regulating valve.

[0016] In one embodiment of the first aspect, the cooling device includes a cooling tower and a cooling water pump connected to each other, the cooling tower has the liquid return end, and the cooling water pump has the liquid outlet end.

[0017] In one embodiment of the first aspect, the circulating device includes a circulating water tank, a circulating water pump and a liquid level sensor, the circulating water tank is connected to the bottom of the chamber, the circulating water pump is connected to the circulating water tank and the spray head assembly in the adjacent chamber, the liquid level sensor is arranged in the circulating water tank, and the liquid level sensor is electrically connected to the circulating water pump.

[0018] In one embodiment of the first aspect, the cylinder is rotatably arranged in the housing, and the cooling kiln further includes a driving member, and the driving end of the driving member is connected to the cylinder to drive the cylinder to rotate.

[0019] In one embodiment of the first aspect, the chamber includes a first chamber, a second chamber and a third chamber, the first chamber is adjacent to the discharging end, the third chamber is adjacent to the feeding end, and the second chamber is located between the first chamber and the third chamber;

[0020] The spray head assembly includes a first spray head assembly arranged in the first chamber, a second spray head assembly arranged in the second chamber and a third spray head assembly arranged in the third chamber;

[0021] The circulation device includes a first circulation device and a second circulation device. The first circulation device is connected to the bottom of the first chamber and the second spray head assembly, and the second circulation device is connected to the bottom of the second chamber and the third spray head assembly.

[0022] In one embodiment of the first aspect, the circulation device further includes a third circulation device, which is connected to the bottom of the third chamber and the cooling device.

[0023] In a second aspect, an embodiment of the present application further provides a dehydration device, which includes a rotary kiln and the cooling system described in any of the above embodiments, and the feeding end is connected to the rotary kiln.

[0024] The beneficial effects of the present application are as follows: The present application provides a cooling system. Materials enter the cylinder from the feeding end and are discharged from the discharging end. At the same time, the coolant cooled by the cooling device flows into the spray head assembly in the chamber adjacent to the discharging end from the liquid outlet end, sprays and cools the cylinder in this chamber and the materials in the cylinder, and then flows by gravity to the bottom of this chamber. On this basis, the circulation device enables the coolant to flow between adjacent two chambers in a direction opposite to the material conveying direction, so that the coolant is sprayed out through the spray head assemblies in each chamber in turn, and sprays and cools the cylinder and the materials in each chamber. The coolant finally flows by gravity to the bottom of the chamber adjacent to the feeding end and returns to the cooling device through the liquid return end for cooling again. Therefore, the above cooling system can achieve multi-stage countercurrent spray cooling, enabling the coolant to exchange heat with the cylinder multiple times. Since the temperature of the materials in the cylinder gradually decreases along the material conveying direction, while the temperature of the coolant gradually decreases in a direction opposite to the material conveying direction, the temperature difference between the coolant and the materials always remains within a certain range, and the heat exchange efficiency is higher, and less water is used under the condition of achieving the same cooling effect. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 Shows a schematic structural diagram of the cooling system in some embodiments of the present application;

[0027] Figure 2 Shows a schematic internal structure diagram of the housing in some embodiments of the present application.

[0028] Main Element Symbol Description:

[0029] 100 - Cooling kiln; 110 - Housing; 111 - First barrier; 120 - Cylinder; 121 - Feed end; 122 - Discharge end; 123 - Second barrier; 124 - Temperature sensor; 130 - Chamber; 131 - First chamber; 132 - Second chamber; 133 - Third chamber; 140 - Driving member; 200 - Spraying device; 210 - Nozzle assembly; 211 - First nozzle assembly; 212 - Second nozzle assembly; 213 - Third nozzle assembly; 220 - Regulating valve; 230 - Flowmeter; 300 - Circulation device; 300a - First circulation device; 300b - Second circulation device; 300c - Third circulation device; 310 - Circulation water tank; 320 - Circulation water pump; 330 - Liquid level sensor; 340 - Check valve; 350 - Manual valve; 400 - Cooling device; 410 - Cooling tower; 411 - Liquid return end; 420 - Cooling water pump; 421 - Liquid outlet end. Detailed implementation manners

[0030] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0031] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0032] In the present application, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0034] Embodiments of the present application provide a cooling system, specifically a countercurrent cooling system for a rotary kiln, which is used to cool the materials after being calcined in the rotary kiln. For example, the materials can be iron phosphate, or other products after being processed through the calcination and dehydration process.

[0035] Combined Figure 1 As shown, in some embodiments, the cooling system includes a cooling kiln 100, a spraying device 200, a circulating device 300, and a cooling device 400.

[0036] The cooling kiln 100 includes a housing 110 and a cylinder 120. The cylinder 120 is penetrated through the housing 110. The cylinder 120 has a feeding end 121 and a discharging end 122, and the cylinder 120 is used for conveying materials. In addition, a plurality of chambers 130 are formed between the inner wall of the housing 110 and the outer wall of the cylinder 120, and the plurality of chambers 130 are arranged along the length direction of the cylinder 120.

[0037] The spraying device 200 includes spray head assemblies 210 respectively arranged in the plurality of chambers 130, and the number of the spray head assemblies 210 is the same as the number of the chambers 130.

[0038] The circulating device 300 is connected to the bottom of the chamber 130 and the spray head assemblies 210 in the adjacent chamber 130, so that the coolant flows between the adjacent two chambers 130 in a direction opposite to the material conveying direction. Specifically, it makes the coolant flow from the bottom of the chamber 130 to the spray head assemblies 210 in the adjacent chamber 130, and then spray out from the spray head assemblies 210 in the adjacent chamber 130.

[0039] The cooling device 400 has a liquid return end 411 and a liquid outlet end 421, and the liquid return end 411 is connected to the bottom of the chamber 130 adjacent to the feeding end 121, and the liquid outlet end 421 is connected to the spray head assemblies 210 in the chamber 130 adjacent to the discharging end 122.

[0040] When using the above cooling system, the material enters the cylinder 120 from the feeding end 121 and is discharged from the discharging end 122. At the same time, the coolant cooled by the cooling device 400 flows into the spray head assembly 210 in the chamber 130 adjacent to the discharging end 122 from the liquid outlet end 421, sprays and cools the cylinder 120 in the chamber 130 and the material in the cylinder 120, and then flows by gravity to the bottom of the chamber 130. On this basis, the circulation device 300 makes the coolant flow between two adjacent chambers 130 in the direction opposite to the material conveying direction, so that the coolant is sprayed out through the spray head assemblies 210 in each chamber 130 in turn, and sprays and cools the cylinder 120 in each chamber 130 and the material in the cylinder 120. The coolant finally flows by gravity to the bottom of the chamber 130 adjacent to the feeding end 121, and returns to the cooling device 400 through the liquid return end 411 for re-cooling.

[0041] Therefore, the above cooling system can achieve multi-stage countercurrent spray cooling, enabling the coolant to exchange heat with the cylinder 120 multiple times. Since the temperature of the material in the cylinder 120 gradually decreases along the material conveying direction, and the temperature of the coolant gradually decreases in the direction opposite to the material conveying direction, the temperature difference between the coolant and the material always remains within a certain range, with higher heat exchange efficiency and less water consumption under the condition of achieving the same cooling effect.

[0042] In contrast, the traditional cooling method is that a spray pipe sprays the entire cylinder 120. At the feeding end 121 of the cylinder 120, the temperature difference between the coolant and the material is the largest and the heat exchange efficiency is the highest. However, when the temperature difference between the coolant and the material is too large, the increase in the temperature difference is not obvious for the improvement of the heat exchange efficiency. On the contrary, at the discharging end 122 of the cylinder 120, the temperature difference between the coolant and the material is the smallest and the heat exchange efficiency is significantly reduced. Generally speaking, the traditional cooling method has the problem of unreasonable coolant distribution, with low heat exchange efficiency and huge water consumption in order to achieve sufficient cooling effect.

[0043] In one embodiment, the cylinder 120 is rotatably arranged on the housing 110. In addition, the cooling kiln 100 further includes a driving member 140. The driving end of the driving member 140 is connected to the cylinder 120 to drive the cylinder 120 to rotate.

[0044] After the material enters the cylinder 120 from the feeding end 121, with the rotation of the cylinder 120, the material moves forward under the action of its own gravity and the friction force between the material and the cylinder 120, and finally is discharged from the discharging end 122.

[0045] Exemplarily, the driving member 140 adopts a driving motor, and a gear is sleeved on the shaft of the driving motor as the driving end. Correspondingly, a gear ring meshing with the gear is sleeved on the cylinder 120. When in use, the driving motor drives the cylinder 120 to rotate through the gear and the gear ring.

[0046] Combined with Figure 2 As shown, in one embodiment, a first barrier 111 is provided on the inner wall of the housing 110. The first barrier 111 is disposed around the cylinder 120 and is in clearance fit with the cylinder 120. The first barrier 111 divides the cavity between the housing 110 and the cylinder 120 to form a plurality of chambers 130.

[0047] It can be understood that when the number of the first barriers 111 is N, the cavity between the housing 110 and the cylinder 120 is divided by N first barriers 111 to form N + 1 chambers 130. Wherein, N is a positive integer.

[0048] In use, the spraying assembly is located above the cylinder 120, and sprays the coolant downward onto the surface of the cylinder 120. The coolant flows downward by gravity to the bottom of the chamber 130 and accumulates in the groove-shaped space formed by the enclosure of the cylinder 120 and the first barrier 111. Thus, the coolant in each chamber 130 is not easily intermingled.

[0049] Exemplarily, the first barrier 111 is an annular baffle. The first barrier 111 is perpendicular to the length direction of the cylinder 120. The outer periphery of the first barrier 111 is fixedly connected to the inner wall of the housing 110, and there is a gap between the inner periphery of the first barrier 111 and the outer wall of the cylinder 120. During the rotation of the cylinder 120, the first barrier 111 does not rub against the cylinder 120.

[0050] Further, in some embodiments, a second barrier 123 is provided on the outer wall of the cylinder 120. The second barrier 123 is disposed around the cylinder 120 and is in clearance fit with the housing 110. The second barrier 123 is adjacent to the first barrier 111.

[0051] In use, the second barrier 123 separates the outer wall of the cylinder 120 in two adjacent chambers 130, which can prevent the coolant from flowing directly into the adjacent chamber 130 along the outer wall of the cylinder 120, and cooperate with the first barrier 111 to better prevent the coolant in each chamber 130 from intermingling.

[0052] It can be understood that the number of the second barriers 123 is not less than the number of the first barriers 111. For example, the number of the second barriers 123 is equal to the number of the first barriers 111, and each second barrier 123 is adjacent to a first barrier 111 respectively. Or, the number of the second barriers 123 is two more than the number of the first barriers 111. One of the second barriers 123 is adjacent to one end of the housing 110, and the other second barrier 123 is adjacent to the other end of the housing 110. The remaining second barriers 123 are adjacent to a first barrier 111 respectively.

[0053] Exemplarily, the second barrier 123 also adopts an annular baffle. The second barrier 123 is perpendicular to the length direction of the cylinder 120. The inner circumference of the second barrier 123 is fixedly connected to the outer wall of the cylinder 120, and there is a gap between the outer circumference of the second barrier 123 and the inner wall of the housing 110. During the rotation of the cylinder 120 and the second barrier 123, the second barrier 123 does not rub against the housing 110. In addition, there is a gap between the second barrier 123 and the adjacent first barrier 111, and the second barrier 123 does not rub against the adjacent first barrier 111.

[0054] Combined Figure 1 As shown, in one embodiment, the spraying device 200 further includes a regulating valve 220, and the liquid outlet end 421 is connected to the spray head assembly 210 in the chamber 130 adjacent to the discharge end 122 through the regulating valve 220.

[0055] Correspondingly, a temperature sensor 124 is provided at the discharge end 122, and the temperature sensor 124 is electrically connected to the regulating valve 220.

[0056] During use, the temperature sensor 124 monitors the discharge temperature of the cooling kiln 100 in real time. When the discharge temperature is higher than the set value, the discharge temperature outputs a signal to the regulating valve 220, and the opening degree of the regulating valve 220 increases, so that the flow rate of the circulating coolant increases, improving the cooling effect, so as to keep the discharge temperature of the cooling kiln 100 stable.

[0057] It can be understood that the regulating valve 220 adopts an electric control valve, and the regulating valve 220 and the temperature sensor 124 are respectively connected to an external control system. The temperature sensor 124 obtains the discharge temperature information of the cooling kiln 100 and transmits the discharge temperature information to the control system. The control system compares the discharge temperature with the set value. When the discharge temperature is higher than the set value, the control system controls the regulating valve 220 to increase the opening degree of the regulating valve 220.

[0058] Furthermore, in some embodiments, the spraying device 200 further includes a flow meter 230. The flow meter 230 is located between the liquid outlet end 421 and the spray head assembly 210 in the chamber 130 adjacent to the discharge end 122, specifically between the regulating valve 220 and the spray head assembly 210 in the chamber 130 adjacent to the discharge end 122.

[0059] During use, the flow meter 230 can monitor the flow rate of the circulating coolant.

[0060] In one embodiment, the circulating device 300 includes a circulating water tank 310, a circulating water pump 320 and a liquid level sensor 330.

[0061] Among them, the circulating water tank 310 is placed below the cooling kiln 100 and is connected to the bottom of the chamber 130. The circulating water pump 320 is connected to the circulating water tank 310 and the spray head assembly 210 in the adjacent chamber 130. The liquid level sensor 330 is arranged on the circulating water tank 310, and the liquid level sensor 330 is electrically connected to the circulating water pump 320.

[0062] During use, the coolant accumulated at the bottom of the chamber 130 flows into the circulating water tank 310 by gravity. The circulating water pump 320 pumps the coolant in the circulating water tank 310 into the spray head assembly 210 in the adjacent chamber 130, so that the coolant continues to be sprayed on the cylinder body 120 through the spray head assembly 210 in the adjacent chamber 130 to cool the material in the cylinder body 120.

[0063] During this process, the liquid level sensor 330 monitors the liquid level in the circulating water tank 310 in real time. When the liquid level in the circulating water tank 310 is lower than a preset value, the circulating water pump 320 stops working. When the liquid level in the circulating water tank 310 is higher than another preset value, the circulating water pump 320 starts to work, and so on in a cycle.

[0064] It can be understood that the motor in the circulating water pump 320 and the liquid level sensor 330 are respectively connected to an external control system. The liquid level sensor 330 obtains the liquid level information of the circulating water tank 310 and transmits the liquid level information to the control system. The control system compares the liquid level information with two preset values, and then controls the motor of the circulating water pump 320 to start or stop running.

[0065] Further, in some embodiments, the circulating device 300 further includes a check valve 340 and a manual valve 350. The circulating water pump 320 is connected to the spray head assembly 210 in the adjacent chamber 130 through the check valve 340 and the manual valve 350 in sequence.

[0066] During use, the check valve 340 can prevent the coolant from flowing back. The manual valve 350 is a normally open valve and is manually closed by the operator during maintenance or repair.

[0067] In one embodiment, the cooling device 400 includes a cooling tower 410 and a cooling water pump 420 which are connected to each other.

[0068] Among them, the cooling tower 410 has a liquid return end 411 and is connected to the bottom of the chamber 130 adjacent to the feeding end 121. The cooling water pump 420 has a liquid outlet end 421 and is connected to the spray head assembly 210 in the chamber 130 adjacent to the discharging end 122.

[0069] During use, the coolant sprays and cools the cylinder body 120 for the last time in the chamber 130 adjacent to the feeding end 121, then flows into the cooling tower 410. After being cooled by the cooling tower 410, it is pumped into the spraying device 200 by the cooling water pump 420 for the next cycle.

[0070] In this embodiment, the chamber 130 includes a first chamber 131, a second chamber 132, and a third chamber 133. Among them, the first chamber 131 is adjacent to the discharge end 122, the third chamber 133 is adjacent to the feed end 121, and the second chamber 132 is located between the first chamber 131 and the third chamber 133.

[0071] Correspondingly, the nozzle assembly 210 includes a first nozzle assembly 211 disposed in the first chamber 131, a second nozzle assembly 212 disposed in the second chamber 132, and a third nozzle assembly 213 disposed in the third chamber 133, and the first nozzle assembly 211 is connected to the cooling device 400 through a flow meter 230 and a regulating valve 220.

[0072] In addition, the circulation device 300 includes a first circulation device 300a and a second circulation device 300b. Both the first circulation device 300a and the second circulation device 300b include structures such as a circulation water tank 310, a circulation water pump 320, and a liquid level sensor 330. The first circulation device 300a is connected to the bottom of the first chamber 131 and the second nozzle assembly 212, and the second circulation device 300b is connected to the bottom of the second chamber 132 and the third nozzle assembly 213.

[0073] During use, the coolant cooled in the cooling tower 410 is pumped into the first nozzle assembly 211 through the cooling water pump 420 to spray and cool the cylinder body 120 in the first chamber 131, and then it flows by gravity to the bottom of the first chamber 131. Under the action of the first circulation device 300a, the coolant at the bottom of the first chamber 131 flows into the second nozzle assembly 212 to spray and cool the cylinder body 120 in the second chamber 132, and then it flows by gravity to the bottom of the second chamber 132. Under the action of the second circulation device 300b, the coolant at the bottom of the second chamber 132 flows into the third nozzle assembly 213 to spray and cool the cylinder body 120 in the third chamber 133, and then it flows by gravity to the bottom of the third chamber 133. Finally, the coolant at the bottom of the third chamber 133 flows into the cooling tower 410 and is cooled again by the cooling tower 410 for the next cycle.

[0074] During this process, the temperature of the coolant sprayed by the first nozzle assembly 211 is the lowest, and the temperature of the coolant sprayed by the third nozzle assembly 213 is the highest. Correspondingly, the temperature of the material in the cylinder body 120 in the first chamber 131 is the lowest, and the temperature of the material in the cylinder body 120 in the third chamber 133 is the highest. Therefore, the temperature difference between the coolant and the material in each chamber 130 always remains within a certain range, the heat exchange efficiency is higher, and the water consumption is less under the condition of achieving the same cooling effect.

[0075] Further, in some embodiments, the circulation device 300 further includes a third circulation device 300c. The third circulation device 300c is connected to the bottom of the third chamber 133 and the cooling device 400 to allow the coolant at the bottom of the third chamber 133 to flow into the cooling device 400.

[0076] It can be understood that when the height of the cooling tower 410 is not lower than that of the cylinder body 120, the third circulation device 300c can ensure the smooth circulation of the coolant. Conversely, if the height of the cooling tower 410 is lower than that of the cylinder body 120, the third circulation device 300c may not be provided, and the coolant at the bottom of the third chamber 133 can flow by gravity into the cooling tower 410.

[0077] In summary, the above cooling system divides the cavity between the housing 110 and the cylinder body 120 to form multiple chambers 130, and sprays the coolant on the cylinder body 120 in each chamber 130 in turn in a direction opposite to the material conveying direction to achieve multi-stage countercurrent spray cooling, enabling the coolant to exchange heat with the cylinder body 120 multiple times. At this time, the temperature difference between the coolant and the material always remains within a certain range, the heat exchange efficiency is higher, and less water is used to achieve the same cooling effect.

[0078] The embodiment of the present application further provides a dehydration device, including a rotary kiln and the cooling system in any of the above embodiments. Among them, the feed end 121 of the cooling kiln 100 is connected to the rotary kiln.

[0079] During use, the material calcined and dehydrated by the rotary kiln enters the feed end 121 of the cooling kiln 100, and the material is cooled by the above cooling system, and then the material is sent to the backend powder system.

[0080] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0081] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A cooling system, characterized in that, Comprising: A cooling kiln (100), including a housing (110) and a cylinder (120) passing through the housing (110). The cylinder (120) has a feed end (121) and a discharge end (122), and the cylinder (120) is used for conveying materials. A plurality of chambers (130) are formed between the inner wall of the housing (110) and the outer wall of the cylinder (120), and the plurality of chambers (130) are arranged along the length direction of the cylinder (120); A spraying device (200), including spray head assemblies (210) respectively arranged in the plurality of chambers (130); A circulating device (300), connecting the bottom of the chamber (130) and the spray head assembly (210) in the adjacent chamber (130), so that the coolant flows between the two adjacent chambers (130) in a direction opposite to the material conveying direction; A cooling device (400), having a liquid return end (411) and a liquid outlet end (421). The liquid return end (411) is connected to the bottom of the chamber (130) adjacent to the feed end (121), and the liquid outlet end (421) is connected to the spray head assembly (210) in the chamber (130) adjacent to the discharge end (122).

2. The cooling system according to claim 1, wherein, A first barrier member (111) is provided on the inner wall of the housing (110). The first barrier member (111) surrounds the cylinder (120) and is in clearance fit with the cylinder (120). The first barrier member (111) divides the cavity between the housing (110) and the cylinder (120) to form the plurality of chambers (130).

3. The cooling system according to claim 2, wherein A second barrier member (123) is provided on the outer wall of the cylinder (120). The second barrier member (123) surrounds the cylinder (120) and is in clearance fit with the housing (110). The second barrier member (123) is adjacent to the first barrier member (111).

4. The cooling system according to claim 1, characterized in that, The spraying device (200) further includes a regulating valve (220). The liquid outlet end (421) is connected to the spray head assembly (210) in the chamber (130) adjacent to the discharge end (122) through the regulating valve (220); A temperature sensor (124) is provided at the discharge end (122), and the temperature sensor (124) is electrically connected to the regulating valve (220).

5. The cooling system according to claim 1, wherein The cooling device (400) includes a cooling tower (410) and a cooling water pump (420) connected to each other. The cooling tower (410) has the liquid return end (411), and the cooling water pump (420) has the liquid outlet end (421).

6. The cooling system according to claim 1, characterized in that, The circulating device (300) includes a circulating water tank (310), a circulating water pump (320), and a liquid level sensor (330). The circulating water tank (310) is connected to the bottom of the chamber (130). The circulating water pump (320) is connected to the circulating water tank (310) and the spray head assembly (210) within the adjacent chamber (130). The liquid level sensor (330) is disposed in the circulating water tank (310), and the liquid level sensor (330) is electrically connected to the circulating water pump (320).

7. The cooling system according to claim 1, characterized in that, The cylinder body (120) is rotatably disposed in the housing (110). The cooling kiln (100) further includes a driving member (140). The driving end of the driving member (140) is connected to the cylinder body (120) to drive the cylinder body (120) to rotate.

8. The cooling system according to any one of claims 1-7, characterized in that, The chamber (130) includes a first chamber (131), a second chamber (132), and a third chamber (133). The first chamber (131) is adjacent to the discharge end (122). The third chamber (133) is adjacent to the feed end (121). The second chamber (132) is located between the first chamber (131) and the third chamber (133). The spray head assembly (210) includes a first spray head assembly (211) disposed in the first chamber (131), a second spray head assembly (212) disposed in the second chamber (132), and a third spray head assembly (213) disposed in the third chamber (133). The circulating device (300) includes a first circulating device (300a) and a second circulating device (300b). The first circulating device (300a) is connected to the bottom of the first chamber (131) and the second spray head assembly (212). The second circulating device (300b) is connected to the bottom of the second chamber (132) and the third spray head assembly (213).

9. The cooling system according to claim 8, characterized in that, The circulating device (300) further includes a third circulating device (300c). The third circulating device (300c) is connected to the bottom of the third chamber (133) and the cooling device (400).

10. A dehydration device, characterized in that, Comprising a rotary kiln and the cooling system according to any one of claims 1-9, wherein the feed end (121) is connected to the rotary kiln.

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