Powdered material cooling device

Abstract

The application discloses a kind of powder material cooling device, including cooling box, material conveying component, heat exchange component, cooling box is equipped with to store cooling water cooling cavity.In material conveying component is built in cooling cavity, it includes spiral conveying coil pipe from bottom to top, conveying coil pipe one end is connected with material feeding pipe, the other end is connected with material discharge pipe.Heat exchange component is built in cooling cavity, it includes coaxially arranged and respectively located in conveying coil pipe, inside heat exchange plate group, outside heat exchange plate group, inside heat exchange plate group, outside heat exchange plate group are jointly connected with refrigerant conveying component.The cooling device of the application can greatly improve the cooling efficiency of powder material, and avoid the problem of material pollution caused by direct contact between powder material and refrigerant.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powder material cooling production, in particular to a powder material cooling device. BACKGROUND

[0002] In production, high-temperature powder material has very high temperature, which is not conducive to subsequent processing and conveying, therefore, it is needed to cool it to normal temperature by cooling. The commonly used method at present is natural cooling, that is, the material is directly contacted with air, and the heat is taken away by normal temperature air, but this way not only occupies large area, takes long time and has low efficiency, but also the material is easily polluted by absorbing moisture in the air in the process of cooling to normal temperature, which affects the quality of the material. SUMMARY

[0003] In order to overcome the above-mentioned shortcomings, the purpose of the present application is to provide a powder material cooling device, which can greatly improve the cooling efficiency of the powder material, and avoid the problem of material pollution caused by direct contact of the powder material with the coolant.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a powder material cooling device, comprising

[0005] a cooling box body, a cooling cavity for storing cooling water is arranged in the cooling box body;

[0006] a material conveying assembly, which is arranged in the cooling cavity, comprises a spiral conveying coil pipe from bottom to top, one end of the conveying coil pipe is connected with a material feeding pipe, and the other end is connected with a material discharging pipe;

[0007] a heat exchange assembly, which is arranged in the cooling cavity, comprises an inner heat exchange plate group and an outer heat exchange plate group which are coaxially arranged and respectively located inside and outside the conveying coil pipe, and the inner heat exchange plate group and the outer heat exchange plate group are jointly connected with a coolant conveying assembly.

[0008] In use, the cooling cavity of the cooling box body is filled with cooling water, so that the conveying coil pipe, the inner heat exchange plate group and the outer heat exchange plate group are all immersed in the cooling water; then the powder material is conveyed into the pipe body of the conveying coil pipe through the air flow from the material feeding pipe, and the heat exchange of the powder material in the pipe body of the conveying coil pipe is carried out by contacting with the cooling water, and then the heat-exchanged powder material is discharged through the material discharging pipe; at the same time of conveying the powder material by the conveying coil pipe, the coolant enters the inner heat exchange plate group and the outer heat exchange plate group through the coolant conveying assembly, and then the heat exchange of the cooling water is carried out by contacting with the cooling water through the inner heat exchange plate group and the outer heat exchange plate group, so as to achieve the purpose of cooling the cooling water and ensure the cooling effect of the cooling water on the conveying coil pipe and the powder material.

[0009] The present application has the following advantages:

[0010] 1. The refrigerant is delivered to the heat exchange component through the refrigerant delivery component, and then the heat exchange component is exchanged with the cooling water stored in the cooling box to achieve the purpose of water bath cooling of the powder material in the delivery coil, which greatly improves the cooling effect of the powder material. Moreover, by using the cooling water as the heat exchange medium between the heat exchange component and the delivery coil, the cooling effect of the refrigerant can be fully utilized, and the water bath can be used to cool the delivery coil comprehensively.

[0011] 2. The delivery coil is sandwiched in the middle by the inner heat exchange plate group and the outer heat exchange plate group, and the cooling water is exchanged through the inner heat exchange plate group and the outer heat exchange plate group. This ensures the consistency of the cooling water temperature on both sides of the delivery coil, improves the heat exchange uniformity, and avoids the problem of delivery coil deformation caused by uneven heating.

[0012] 3. First, the heat exchanger exchanges heat with the heat exchange components through the refrigerant, then the heat exchange components exchange heat with the cooling water, the cooling water then exchanges heat with the conveying coil, and finally the conveying coil exchanges heat with the powdered material. During the entire heat exchange process, the powdered material will only come into contact with the conveying coil, thus avoiding contamination during the cooling process of the powdered material and ensuring the quality of the powdered material.

[0013] 4. The spiral conveying coil can extend the conveying time of powdered materials in the conveying coil to ensure sufficient cooling of the powdered materials;

[0014] 5. Using cooling water as a medium allows for full utilization of the refrigerant, and the consumption of cooling water during the cooling process is minimal, thus achieving the goal of saving refrigerant and cooling water usage.

[0015] Furthermore, the inner heat exchanger plate assembly includes several inner heat exchanger plates arranged in a ring array, and the outer heat exchanger plate assembly includes several outer heat exchanger plates arranged in a ring array. The rings formed by the inner heat exchanger plates and the rings formed by the outer heat exchanger plates are located on the same central axis.

[0016] The distribution of several inner and outer heat exchange plates in a ring array ensures uniform contact with the cooling water near the delivery coil. Furthermore, the rings formed by the inner and outer heat exchange plates are arranged on the same axis, ensuring that the gap thickness between the inner and outer heat exchange plates remains consistent. This, in turn, improves the placement stability of the delivery coil sandwiched between the inner and outer heat exchange plate groups.

[0017] Furthermore, both the inner and outer heat exchange plates are arranged vertically and can be correspondingly installed on the inner and outer sides of the conveying coil. The corresponding inner and outer heat exchange plates are located on the same vertical plane.

[0018] Further, the inner heat exchange plate and the outer heat exchange plate each include two oppositely arranged plate pieces, the outer periphery of the two plate pieces is welded and fixed, and a heat exchange cavity capable of communicating with the refrigerant conveying assembly is defined between the two plate pieces. The refrigerant can enter the heat exchange cavity through the communication between the heat exchange cavity and the refrigerant conveying assembly to exchange heat with the plate pieces.

[0019] Further, the refrigerant conveying assembly includes an upper conveying pipe group and a lower conveying pipe group located above and below the heat exchange assembly respectively, the upper conveying pipe group and the lower conveying pipe group each include a conveying main pipe in a ring structure, a plurality of No. 1 branch pipes corresponding to the heat exchange cavities of the inner heat exchange plates are formed on the inner side of the conveying main pipe, and a plurality of No. 2 branch pipes corresponding to the heat exchange cavities of the outer heat exchange plates are formed on the outer side of the conveying main pipe; and a refrigerant inlet and outlet pipe is connected to the side of the conveying main pipe away from the heat exchange assembly.

[0020] The refrigerant enters the conveying main pipe through the refrigerant inlet and outlet pipe of one conveying main pipe, is then distributed into the heat exchange cavities in the corresponding inner heat exchange plates and outer heat exchange plates through the plurality of No. 1 branch pipes and No. 2 branch pipes on the conveying main pipe to exchange heat with the inner heat exchange plates and outer heat exchange plates, and then enters the No. 1 branch pipe or No. 2 branch pipe of another conveying main pipe from the heat exchange cavities and is collected into the corresponding conveying main pipe to be discharged through the refrigerant inlet and outlet pipe of the conveying main pipe.

[0021] The communication between the upper conveying pipe group and the lower conveying pipe group and the heat exchange cavities in the inner heat exchange plates and outer heat exchange plates enables the refrigerant to flow through the inner heat exchange plates and outer heat exchange plates from top to bottom or from bottom to top to realize heat exchange with the inner heat exchange plates and outer heat exchange plates.

[0022] Further, a stirring assembly is arranged inside the conveying coil, the stirring assembly includes a stirring shaft arranged in the vertical direction and penetrating through the cooling box, one end of the stirring shaft is connected to a stirring motor mounted on the cooling box, a plurality of upper and lower staggered stirring blades are arranged on the side wall of the stirring shaft, and a space is left between the stirring blades and the inner heat exchange plate group. The cooling water can be stirred by the stirring assembly to ensure the uniformity of heat exchange of the cooling water, and the space left between the stirring blades and the inner heat exchange plate group can prevent the stirring blades from rubbing against the inner heat exchange plate group when rotating.

[0023] Further, a plurality of side wall through holes are formed in the side wall of the cooling box for the material inlet pipe and the material outlet pipe to pass through, and a plurality of end face through holes are formed in the upper and lower ends of the cooling box for the refrigerant inlet and outlet pipe to pass through.

[0024] Further, the cooling box includes a ring-shaped side plate, an upper top plate and a lower bottom plate, wherein the ring-shaped side plate includes coaxially arranged inner and outer ring plates, and a heat preservation layer is arranged between the inner and outer ring plates. The arrangement of the heat preservation layer can reduce heat loss in the cooling box and prevent the conveying coil from deforming due to uneven heating.

[0025] Further, the coolant conveying assembly is spaced apart from the upper top plate and the lower bottom plate.

[0026] Further, the direction in which the material conveying assembly conveys the powder material is opposite to the direction in which the coolant conveying assembly conveys the coolant. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a structural schematic view of a cooling device according to an embodiment of the present application;

[0028] Figure 2 FIG. 2 is a structural schematic view of an upper top plate according to an embodiment of the present application;

[0029] Figure 3 FIG. 3 is a structural schematic view of a cooling cavity according to an embodiment of the present application;

[0030] Figure 4 FIG. 4 is a structural schematic view of a ring-shaped side plate according to an embodiment of the present application; Figure 3

[0031] Figure 5 FIG. 5 is a structural schematic view of a lower bottom plate according to an embodiment of the present application;

[0032] Figure 6 FIG. 6 is a partial enlarged view of position A in FIG. 5; Figure 5

[0033] FIG. 7 is a partial enlarged view of position B in FIG. 5.

[0034] 1-cooling box; 11-ring-shaped side plate; 12-upper top plate; 13-thermal insulation layer; 2-conveying coil pipe; 21-material feeding pipe; 22-material discharging pipe; 3-inner heat exchange plate group; 31-inner heat exchange plate; 4-outer heat exchange plate group; 41-outer heat exchange plate; 5-conveying main pipe; 51-first branch pipe; 52-second branch pipe; 53-coolant feeding and discharging pipe; 61-stirring shaft; 62-stirring motor; 63-stirring blade. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present application are described in detail below with reference to the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the protection scope of the present application can be more clearly defined.

[0036] EMBODIMENT

[0037] Reference is made to the accompanying drawings that show a preferred embodiment of the present application. Figures 1-3 ​​As shown, the powder material cooling device of the present application comprises a cooling box 1, a material conveying assembly, and a heat exchange assembly. The cooling box 1 is internally provided with a cooling cavity for storing cooling water. The material conveying assembly is internally arranged in the cooling cavity and comprises a conveying coil 2 in a spiral shape from bottom to top, one end of the conveying coil 2 is connected with a material feeding pipe 21 penetrating through the cooling box, and the other end is connected with a material discharging pipe 22 penetrating through the cooling box 1. The heat exchange assembly is also internally arranged in the cooling cavity and comprises an inner heat exchange plate set 3 and an outer heat exchange plate set 4 coaxially arranged and respectively located at the inner and outer sides of the conveying coil 2 and capable of clamping the conveying coil 2, and the inner heat exchange plate set 3 and the outer heat exchange plate set 4 are jointly connected with a refrigerant conveying assembly.

[0038] In use, the cooling cavity of the cooling box 1 is filled with cooling water so that the conveying coil 2, the inner heat exchange plate set 3, and the outer heat exchange plate set 4 are all immersed in the cooling water; then the powder material is conveyed into the pipe body of the conveying coil 2 through the material feeding pipe 21 by air flow, and the powder material in the pipe body of the conveying coil 2 is subjected to heat exchange with the cooling water, and then the heat-exchanged powder material is discharged through the material discharging pipe 22; while the powder material is conveyed by the conveying coil 2, the refrigerant enters the inner heat exchange plate set 3 and the outer heat exchange plate set 4 through the refrigerant conveying assembly, and then the refrigerant is subjected to heat exchange with the cooling water through the inner heat exchange plate set 3 and the outer heat exchange plate set 4, so as to achieve the purpose of cooling the cooling water and ensuring the cooling effect of the cooling water on the conveying coil 2 and the powder material.

[0039] The refrigerant is conveyed into the heat exchange assembly through the refrigerant conveying assembly, and then subjected to heat exchange with the cooling water stored in the cooling box 1, so as to achieve the purpose of cooling the powder material in the conveying coil 2 through water bath, and the cooling water can fully play the refrigeration effect of the refrigerant as the heat exchange medium between the heat exchange assembly and the conveying coil 2, and the consumption of the cooling water is very small in the whole process, which can save the amount of refrigerant and cooling water and save costs. In addition, the coaxial arrangement of the inner heat exchange plate set 3 and the outer heat exchange plate set 4 can make the spacing between the inner heat exchange plate set 3 and the outer heat exchange plate set 4 consistent and ensure the clamping stability of the conveying coil 2, and the inner heat exchange plate set 4 and the outer heat exchange plate set 4 can simultaneously perform heat exchange with the inner and outer sides of the conveying coil 2, which improves the uniformity of heat exchange and avoids the deformation of the conveying coil 2 caused by uneven heating.

[0040] In an example, referring to the accompanying drawings, Figures 3-4As shown, the inner heat exchange plate group 3 includes a plurality of inner heat exchange plates 31 arranged in a ring array, and the outer heat exchange plate group 4 includes a plurality of outer heat exchange plates 41 arranged in a ring array. The rings formed by the plurality of inner heat exchange plates 31 and the rings formed by the plurality of outer heat exchange plates 41 are on the same axial line. The inner heat exchange plates 31 and the outer heat exchange plates 41 are arranged in the vertical direction and can be arranged on the inner and outer sides of the conveying coil 2 one by one, and the corresponding inner heat exchange plate 31 and the outer heat exchange plate 41 are located on the same vertical plane. The plurality of inner heat exchange plates 31 and the plurality of outer heat exchange plates 41 arranged in a ring array can ensure uniform contact with the cooling water near the conveying coil 3, thereby achieving the purpose of sufficient heat exchange.

[0041] Specifically, the inner heat exchange plate 31 and the outer heat exchange plate 41 each include two oppositely arranged plate pieces, the outer periphery of the two plate pieces is welded and fixed, and a heat exchange cavity capable of communicating with the refrigerant conveying assembly is defined between the two plate pieces. The communication between the heat exchange cavity and the refrigerant conveying assembly enables the refrigerant to enter the heat exchange cavity to exchange heat with the plate pieces.

[0042] Further, referring to the accompanying drawings, Figure 4 As shown, the refrigerant conveying assembly includes an upper conveying pipe group and a lower conveying pipe group located above and below the heat exchange assembly respectively. The upper conveying pipe group and the lower conveying pipe group each include a conveying main pipe 5 in a ring structure. The inner side of the conveying main pipe 5 is provided with a plurality of one-way branch pipes 51 corresponding to the heat exchange cavities of the inner heat exchange plates 31, and the outer side is provided with a plurality of two-way branch pipes 52 corresponding to the heat exchange cavities of the outer heat exchange plates 41. The side of the conveying main pipe 5 away from the heat exchange assembly is connected with a refrigerant inlet and outlet pipe 53 for the refrigerant to enter and exit.

[0043] In order to facilitate the description of the refrigerant conveying path, one conveying main pipe is named as a first conveying main pipe, and the other conveying main pipe is named as a second conveying main pipe. When conveying the refrigerant, the refrigerant enters the pipe body of the first conveying main pipe through the refrigerant inlet and outlet pipe 53 of the first conveying main pipe, and then enters the heat exchange cavities in the corresponding inner heat exchange plates 31 and outer heat exchange plates 41 through the plurality of one-way branch pipes 51 and two-way branch pipes 52 on the first conveying main pipe, so as to exchange heat with the corresponding inner heat exchange plates 31 and outer heat exchange plates 41. Then the refrigerant enters the one-way branch pipe 51 or the two-way branch pipe 52 of the second conveying main pipe through the heat exchange cavities, and is collected in the second conveying main pipe, and is discharged through the refrigerant inlet and outlet pipe 53 of the second conveying main pipe. It should be noted that the refrigerant can use conventional refrigerants in the prior art, such as freon.

[0044] The connection between the upper and lower conveying pipe assemblies and the heat exchange cavities within the inner heat exchange plate 31 and outer heat exchange plate 41 allows the refrigerant to flow from top to bottom or from bottom to top through the inner and outer heat exchange plates 31, thereby achieving heat exchange on the inner and outer heat exchange plates 31 and 41. It is important to note that in the actual design, the direction in which the material conveying assembly conveys the powdered material is opposite to the direction in which the refrigerant conveying assembly conveys the refrigerant. That is, when the powdered material enters the conveying coil 2 from bottom to top, the refrigerant enters the upper conveying pipe assembly, the heat exchange cavity, and the lower conveying pipe assembly sequentially from top to bottom; conversely, when the powdered material enters the conveying coil 2 from top to bottom, the refrigerant enters the lower conveying pipe assembly, the heat exchange cavity, and the upper conveying pipe assembly sequentially from bottom to top.

[0045] In one example, the cooling cavity is further equipped with a stirring assembly located inside the inner heat exchange plate assembly 3. The stirring assembly includes a stirring shaft 61 that extends vertically through the cooling box 1. One end of the stirring shaft 61 is connected to a stirring motor 62 mounted on the cooling box 1. Several vertically staggered stirring blades 63 are arranged on the side wall of the stirring shaft 61, and a gap is left between the stirring blades 63 and the inner heat exchange plate assembly 3. When the stirring motor 62 is started, the stirring shaft 61 rotates, driving the stirring blades 63 to rotate, thereby achieving sufficient stirring of the cooling water and ensuring the uniformity of heat exchange. The gap between the stirring blades 63 and the inner heat exchange plate assembly 3 prevents the stirring blades 63 from rubbing against the inner heat exchange plate assembly 3 when rotating.

[0046] See Appendix for one example. Figure 2 , 5 As shown, the cooling chamber 1 includes an annular side plate 11, an upper top plate 12, and a lower bottom plate. The upper top plate 12 and the lower bottom plate respectively cover the upper and lower end faces of the annular side plate 11, and the annular side plate 11 defines a cooling cavity. The annular side plate 11 has side wall through holes corresponding to the material inlet pipe 21 and the material outlet pipe 22, respectively. The upper top plate 12 and the lower bottom plate have end face through holes corresponding to the refrigerant inlet and outlet pipes 53 of the upper and lower conveying pipe groups, respectively. When the refrigerant conveying assembly, heat exchange assembly, and conveying coil are installed in the cooling cavity, a gap is left between the refrigerant conveying assembly, heat exchange assembly, and conveying coil 2 and the upper top plate 12 and the lower bottom plate to ensure that when the cooling cavity is filled with cooling water, the refrigerant conveying assembly, heat exchange assembly, and conveying coil 2 can all be immersed in the cooling water.

[0047] See Appendix for one example. Figure 5 , 6 As shown, the annular side plate 11 includes an inner ring plate and an outer ring plate arranged coaxially, with a thermal insulation layer 13 sandwiched between the inner ring plate and the lower ring plate. The thermal insulation layer 13 reduces heat loss in the cooling box 1 and prevents deformation of the conveying coil 2 due to uneven heating.

[0048] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application, and any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A device for cooling a pulverous material, characterized in that: The application relates to a cooling device for cooling powder materials, which comprises a cooling box body provided with a cooling cavity for storing cooling water; a material conveying assembly arranged in the cooling cavity and comprising a spiral conveying coil pipe, one end of the conveying coil pipe being connected with a material feeding pipe and the other end being connected with a material discharging pipe; a heat exchange assembly arranged in the cooling cavity and comprising an inner heat exchange plate group and an outer heat exchange plate group coaxially arranged and respectively arranged on the inner side and the outer side of the conveying coil pipe, the inner heat exchange plate group and the outer heat exchange plate group being connected with a refrigerant conveying assembly; the distance between the inner heat exchange plate group and the outer heat exchange plate group is uniform, and the inner heat exchange plate group and the outer heat exchange plate group are used for synchronously exchanging heat on the inner side and the outer side of the conveying coil pipe; the inner heat exchange plate group comprises a plurality of annularly arranged inner heat exchange plates, and the outer heat exchange plate group comprises a plurality of annularly arranged outer heat exchange plates; the annulus surrounded by the inner heat exchange plates and the annulus surrounded by the outer heat exchange plates are located on the same axial line; the inner heat exchange plates and the outer heat exchange plates are arranged along the vertical direction and can be arranged on the inner side and the outer side of the conveying coil pipe one by one; the corresponding inner heat exchange plate and the outer heat exchange plate are located on the same vertical plane; the inner heat exchange plate and the outer heat exchange plate each comprise two oppositely arranged plate pieces, the outer periphery of the two plate pieces is welded and fixed, and a heat exchange inner cavity which can communicate with the refrigerant conveying assembly is defined between the two plate pieces. the refrigerant conveying assembly comprises an upper conveying pipe group and a lower conveying pipe group arranged above and below the heat exchange assembly respectively, the upper conveying pipe group and the lower conveying pipe group each comprise a conveying main pipe with an annular structure, the inner side of the conveying main pipe is provided with a plurality of one-way branch pipes which are in one-to-one correspondence with the heat exchange inner cavities of the inner heat exchange plates, and the outer side of the conveying main pipe is provided with a plurality of two-way branch pipes which are in one-to-one correspondence with the heat exchange inner cavities of the outer heat exchange plates; and the side of the conveying main pipe away from the heat exchange assembly is connected with a refrigerant inlet and outlet pipe.

2. A powder material cooling device according to claim 1, characterized in that: the cooling device further comprises a stirring assembly arranged on the inner side of the conveying coil pipe, the stirring assembly comprises a stirring shaft arranged on the cooling box body along the vertical direction, one end of the stirring shaft is connected with a stirring motor arranged on the cooling box body, a plurality of up-and-down staggered stirring blades are arranged on the side wall of the stirring shaft, and a spacing is left between the stirring blades and the inner heat exchange plate group.

3. A powder material cooling device according to claim 2, characterized in that: the side wall of the cooling box body is respectively provided with a side wall through hole for the material feeding pipe and the material discharging pipe, and the upper end and the lower end of the cooling box body are respectively provided with end face through holes for the refrigerant inlet and outlet pipe.

4. A powder material cooling device according to claim 1, characterized in that: the cooling box body comprises an annular side plate, an upper top plate and a lower bottom plate, the annular side plate comprises an inner ring plate and an outer ring plate coaxially arranged, and a heat preservation layer is arranged between the inner ring plate and the lower ring plate.

5. A powder material cooling device according to claim 4, characterized in that: a spacing is left between the refrigerant conveying assembly and the upper top plate and the lower bottom plate.

6. A powder material cooling device according to claim 5, characterized in that: the conveying direction of the powder material of the material conveying assembly is opposite to the conveying direction of the refrigerant of the refrigerant conveying assembly.

7. A powder material cooling device according to claim 1, characterized in that: ​

Images