Powder cooler and spray drying tower

Abstract

The utility model provides a powder cooler and a spray drying tower, and the powder cooler comprises a cooling cylinder which is provided with a cooling cavity and a plurality of air distribution ports communicated with the cooling cavity; and the plurality of air distribution doors are movably arranged on the cooling cylinder and are matched with the plurality of air distribution ports in a one-to-one manner so as to control the opening sizes of the air distribution ports. The powder cooler is installed at the bottom of the tower body of the spray drying tower, powder falls into the cooling cavity from the tower body, and due to the fact that the tower body is in a negative pressure state when working, a large amount of cold air enters the cooling cavity from the air distribution opening, and workers can automatically cool the powder cooler according to the material falling situation. The opening size of each air distribution port is independently adjusted by utilizing the air distribution door, so that the air inlet amount of cold air can be flexibly adjusted, the temperature of the powder can be reduced, the problems of moisture regaining and caking when the powder is conveyed from the spray drying tower to a sieving process are effectively solved, and the utilization rate of the powder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic production, in particular to a powder cooler and a spray drying tower. Background Art

[0002] Ceramic production is a complex process. Its main production steps include ball milling, powder preparation, pressing, kiln drying, glazing and printing, firing and polishing, etc. Among them, the powder preparation process is an important link in ceramic production, and the spray drying tower is an indispensable production equipment for powder preparation. Its working principle is that the hot air furnace provides high-temperature hot air to the tower body through the hot air pipe, and the mud containing water processed by the ball milling process is pumped to the atomizer by the mud pump, and sprayed from bottom to top through the atomizer nozzle to be atomized into mud droplets with tiny diameter, so that the mud droplets are fully contacted with the high-temperature hot air for dehydration and drying, and spherical powder particles suitable for pressing and molding in the subsequent process are obtained, and gathered at the bottom of the tower under the action of gravity for unloading and storage for standby. However, in the production process, the powder obtained after the slurry is dried at high temperature is often too hot. As the heat of the powder dissipates, it encounters water molecules in the air and condenses into water mist on the powder conveyor belt. When the powder is unloaded on the powder conveyor belt, it is easy to be stained by water mist, which causes the powder to regain moisture and agglomerate during transportation, which is not conducive to the subsequent screening and storage of the powder, and affects the quality of the powder pressing and molding. Therefore, in order to reduce the powder outlet temperature of the spray drying tower, some cooling devices can be added to cool it. Utility Model Content

[0003] The main purpose of the utility model is to provide a powder cooler and a spray drying tower, aiming to reduce the temperature of the powder and effectively solve the problem of moisture regain and agglomeration of the powder when it is transported from the spray drying tower to the screening process.

[0004] In order to achieve the above purpose, the technical solutions of the utility model include:

[0005] The utility model provides a powder cooler, comprising:

[0006] A cooling cylinder having a cooling cavity and a plurality of air distribution ports in communication with the cooling cavity;

[0007] A plurality of air distribution doors are movably arranged on the cooling cylinder and matched with the plurality of air distribution ports one by one to control the opening size of the air distribution ports.

[0008] Compared with the prior art, the utility model provides a powder cooler, which is installed at the bottom of the tower body of the spray drying tower. The powder falls from the tower body into the cooling chamber. Since the tower body is in a negative pressure state when working, a large amount of cold air enters the cooling chamber at the air distribution port. The staff can use the air distribution door to adjust the opening size of each air distribution port separately according to the falling situation, and can flexibly adjust the air intake volume of the cold air to reduce the temperature of the powder, effectively solve the problem of rehumidification and agglomeration of the powder when it is transported from the spray drying tower to the screening process, and improve the utilization rate of the powder.

[0009] In a preferred embodiment, the air distribution door is slidably arranged on the cooling cylinder along a horizontal direction, and the air distribution door moves relative to the air distribution port under the action of an external force.

[0010] In a preferred embodiment, the powder cooler further comprises an inner cone cylinder which is open at the top and the bottom; the inner cone cylinder is in a truncated cone structure; the inner cone cylinder is arranged in the cooling cavity, and the inner cone cylinder has a large opening facing upward and is connected to the inner wall surface of the cooling cavity.

[0011] In a preferred embodiment, the plurality of air distribution ports are evenly distributed circumferentially on the wall surface of the cooling cylinder and are arranged facing the outer wall surface of the inner cone cylinder.

[0012] In a preferred embodiment, the cooling cylinder further has a plurality of air inlets, which are communicated with the cooling cavity and are located above the inner cone.

[0013] In a preferred embodiment, the powder cooler also includes a plurality of air hoods, which are matched with the plurality of air inlets one by one. The air hoods have a blocking portion, and the shape and size of the blocking portion are matched with the shape and size of the air inlet, and are used to control the switch of the air inlet.

[0014] In a preferred embodiment, the powder cooler also includes a cone cap, which has a conical structure; the cone cap is arranged in the cooling chamber and located above the inner cone cylinder, the cone top of the cone cap is arranged upward, and the air inlet is arranged facing the cone cap.

[0015] In a preferred embodiment, the cone top of the cone cap is arranged to protrude from the cooling cavity.

[0016] In a preferred embodiment, the powder cooler further comprises a plurality of support plates, one end of each support plate is connected to the wall surface of the cooling chamber, and the other end is connected to the outer wall surface of the cone cap, so that the cone cap is suspended in the middle of the cooling chamber.

[0017] The utility model also provides a spray drying tower, which comprises a tower body and the powder cooler as described above, wherein the powder cooler is installed at the bottom of the tower body.

[0018] In order to better understand and implement the present invention, the following figure is combined with the accompanying drawings to explain the present invention in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the structure of the powder cooler;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the powder cooler.

[0022] Description of reference numerals:

[0023] 1 cooling cylinder, 11 cooling cavity, 12 air distribution port, 13 air inlet, 2 air door, 21 handle, 3 inner cone cylinder, 4 air hood, 5 cone hood, 6 support plate. DETAILED DESCRIPTION

[0024] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0025] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0026] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0027] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0028] In the description of the present invention, it should be understood that the terms "vertical", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0029] like Figure 1 and Figure 2 As shown, the utility model provides a powder cooler, comprising:

[0030] The cooling cylinder 1 has a cooling cavity 11 and a plurality of air distribution ports 12 connected to the cooling cavity 11;

[0031] A plurality of air distribution doors 2 are movably arranged on the cooling cylinder 1 and matched with the plurality of air distribution ports 12 one by one to control the opening size of the air distribution ports 12 .

[0032] Compared with the prior art, the utility model provides a powder cooler, which is installed at the bottom of the tower body of the spray drying tower. The powder falls from the tower body into the cooling chamber 11. Since the tower body is in a negative pressure state when working, a large amount of cold air enters the cooling chamber 11 at the air distribution port 12. The staff can use the air distribution door 2 to adjust the opening size of the air distribution port 12 according to the falling situation, and can flexibly adjust the air intake volume of the cold air to reduce the temperature of the powder, effectively solve the problem of rehumidification and agglomeration of the powder when it is transported from the spray drying tower to the screening process, and improve the utilization rate of the powder.

[0033] In one embodiment, the air distribution door 2 is slidably arranged on the cooling cylinder 1 in the horizontal direction, and the air distribution door 2 moves relative to the air distribution port 12 under the action of an external force, so that the staff can move the air distribution door 2 in a push-pull manner, which is convenient for operation. In addition, the push-pull air distribution door 2 is adopted, and its moving direction is roughly perpendicular to the direction of cold air entering, and the angle difference is large. The air distribution door 2 is less affected by the cold air pressure, and it is not easy to move due to the influence of the wind pressure and change the opening size of the air distribution port 12, thereby making the opening size of the air distribution port 12 controllable and stabilizing the air intake of the cold air.

[0034] Furthermore, a handle 21 is provided on the air distribution door 2 to facilitate workers to push and pull the air distribution door 2.

[0035] In one embodiment, the powder cooler further comprises an inner cone 3 which is open at the top and bottom; the inner cone 3 is a truncated cone structure; the inner cone 3 is arranged in the cooling chamber 11, and the inner cone 3 is facing upward and connected to the inner wall surface of the cooling chamber 11. When the powder falls from the spray drying tower into the cooling chamber 11, it will fall on the inner wall surface of the inner cone 3, so that the speed of the powder falling is greatly reduced. The powder will slide along the inner wall surface of the inner cone 3 to the bottom of the inner cone 3, and then fall out of the cooling cylinder 1. Since the powder is buffered by the inner cone 3, the speed of the powder movement is greatly reduced, which will undoubtedly increase the time the powder stays in the cooling chamber 11, that is, increase the time the cold air contacts the powder, and accelerate the cooling speed of the powder.

[0036] Furthermore, the plurality of air distribution ports 12 are evenly distributed circumferentially on the wall surface of the cooling cylinder 1, so that the air intake volume at each location of the cooling cylinder 1 can be relatively uniform. The air distribution ports 12 are arranged facing the outer wall surface of the inner cone 3, which is beneficial for the cold air entering from the air distribution ports 12 to cool the inner cone 3. The hot powder encounters the cold surface of the inner cone 3, which can further accelerate the cooling speed of the powder; and the cold air entering from the air distribution ports 12 can enter the inner side of the inner cone 3 through the bottom opening of the inner cone 3 under the action of negative pressure, and the cold air entering from the air distribution ports 12 can keep cooling the powder.

[0037] Furthermore, the cooling cylinder 1 also has a plurality of air inlets 13, which are connected to the cooling chamber 11 and are located above the inner cone 3 to further increase the amount of cold air entering. The cold air entering from the air inlets 13 can cool down the powder that has just fallen into the cooling chamber 11 and has not fallen into the inner cone 3, thereby further accelerating the cooling speed of the powder.

[0038] Furthermore, the powder cooler further comprises a plurality of air hoods 4, which are matched with the plurality of air inlets 13 one by one, and the air hoods 4 have a blocking portion, the shape and size of which are matched with the shape and size of the air inlet 13, and are used to control the opening and closing of the air inlet 13. When not in operation, the air hood 4 is used to block the air inlet 13 to prevent dust and other foreign matter from entering; when in operation, the staff removes the air hood 4 from the air inlet 13, and can observe the falling of the powder through the air inlet 13, and can appropriately adjust the number of the air inlet 13 opened and the opening size of the air hood 12 according to the falling of the powder.

[0039] Furthermore, the powder cooler further comprises a cone cap 5, which is of a conical structure; the cone cap 5 is arranged in the cooling chamber 11 and is located above the inner cone 3, and the cone top of the cone cap 5 is arranged upward; the air inlet 13 is arranged facing the cone cap 5. On the one hand, the cone top of the cone cap 5 can impact and crush the large mud blocks falling from the spray drying tower, and then discharge them through cooling by cold air; on the other hand, the powder naturally falls from the spray drying tower into the cooling chamber 11, and first contacts with the cone cap 5, and the cone cap 5 has a deceleration effect on the powder, and then the cold air from the air inlet 13 cools the powder, which increases the contact time between the powder and the cold air, and accelerates the cooling speed of the powder; and because the cold air entering from the air inlet 13 can blow to the surface of the cone cap 5, the hot powder can also accelerate the cooling speed of the powder after contacting with the cold surface of the cone cap 5.

[0040] Preferably, the cone top of the cone cap 5 is arranged to protrude from the cooling chamber 11 so as to impact large mud blocks into broken mud blocks before they enter the cooling chamber 11, so that the broken mud blocks can be cooled by cold air just when they enter the cooling chamber 11.

[0041] Preferably, the cone cap 5 has a hollow cone structure, and the cold air entering from the air distribution port 12 and the cold air entering from the bottom opening of the cooling chamber 11 blow upward under the action of negative pressure, which can cool the inner wall surface of the cone cap 5, thereby further accelerating the cooling speed of the powder.

[0042] Furthermore, the powder cooler also includes a plurality of support plates 6, one end of the support plate 6 is connected to the wall of the cooling chamber 11, and the other end is connected to the outer wall of the cone cap 5, so as to support the cone cap 5, so that the cone cap 5 is suspended in the middle of the cooling chamber 11, so that the powder can be dispersed and dropped more evenly, so that the cold air everywhere can fully contact the powder, further accelerating the cooling speed of the powder.

[0043] Preferably, the support plate 6 is arranged vertically so that the support plate 6 occupies a very small lateral space, so that the powder will not accumulate on the surface of the support plate 6.

[0044] The utility model also provides a spray drying tower, which includes a tower body and the powder cooler as described above, wherein the powder cooler is installed at the bottom of the tower body. The powder is dried in the tower body and then falls into the powder cooler, and the powder cooler cools the powder, effectively solving the problem of moisture resurgence and agglomeration of the powder when it is transported from the spray drying tower to the screening process, thereby improving the utilization rate of the powder.

[0045] The present invention is not limited to the above-mentioned embodiments. If various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, and if these modifications and variations fall within the claims of the present invention and the scope of equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A powder cooler, It is characterized in that include: A cooling cylinder having a cooling cavity and a plurality of air distribution ports in communication with the cooling cavity; A plurality of air distribution doors are movably arranged on the cooling cylinder and matched with the plurality of air distribution ports one by one to control the opening size of the air distribution ports.

2. The powder cooler according to claim 1, Features: The air distribution door is slidably arranged on the cooling cylinder along a horizontal direction, and the air distribution door moves relative to the air distribution port under the action of an external force.

3. The powder cooler according to claim 1, Features: The powder cooler also includes an inner cone cylinder which is open at the top and bottom; the inner cone cylinder is a truncated cone structure; The inner cone is arranged in the cooling cavity, with a large opening of the inner cone facing upward and connected to the inner wall surface of the cooling cavity.

4. The powder cooler according to claim 3, Features: The plurality of air distribution ports are evenly distributed on the wall surface of the cooling cylinder in a circumferential direction and are arranged facing the outer wall surface of the inner cone cylinder.

5. The powder cooler according to claim 4, Features: The cooling cylinder also has a plurality of air inlets, which are communicated with the cooling cavity and are located above the inner cone cylinder.

6. The powder cooler according to claim 5, Features: The powder cooler also includes a plurality of air hoods, which are matched with the plurality of air inlets one by one; The air distribution hood has a blocking portion, the shape and size of the blocking portion are adapted to the shape and size of the air inlet, and is used to control the switch of the air inlet.

7. The powder cooler according to claim 5, Features: The powder cooler also includes a cone cap, which has a conical structure; The cone cap is arranged in the cooling cavity and is located above the inner cone cylinder. The cone top of the cone cap is arranged upward, and the air inlet is arranged facing the cone cap.

8. The powder cooler according to claim 7, Features: The cone top of the cone cap protrudes from the cooling cavity.

9. The powder cooler according to claim 7, Features: The powder cooler also includes a plurality of support plates, one end of each support plate is connected to the wall surface of the cooling cavity, and the other end is connected to the outer wall surface of the cone cap, so that the cone cap is suspended and installed in the middle of the cooling cavity.

10. A spray drying tower, It is characterized in that The tower comprises a tower body and a powder cooler as claimed in any one of claims 1 to 9, wherein the powder cooler is installed at the bottom of the tower body.

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