Combined drying or cooling system

Abstract

The utility model relates to the related technical field of material drying and cooling, and discloses a combined drying or cooling system which comprises a pressure spray dryer, a vibrated fluidized bed and at least two first air inlet passages, a discharge port of the pressure spray dryer is connected with a feed port of the vibrated fluidized bed, so that materials can enter the vibrated fluidized bed after being dried by the pressure spray dryer; one end of each first air inlet passage is correspondingly communicated with a plurality of air inlets of the vibrated fluidized bed, and all the air inlets are distributed along the running direction of materials in the vibrated fluidized bed; and a first gas heating device and a gas cooling device are arranged on each first air inlet passage. According to the combined type drying or cooling system disclosed by the utility model, the heat-sensitive and softening phenomena of materials on the wall surface can be prevented in the primary drying process, and the sectional operation can be performed in the secondary drying or cooling process, so that the materials can be subjected to multi-section type combined treatment according to the properties of the materials.

Description

Technical Field

[0001] The utility model relates to the technical field related to material drying and cooling, in particular to a combined drying or cooling system. Background Art

[0002] The combined drying system usually consists of a pressure spray dryer, a vibrating fluidized bed, a rotary dehumidifier, and a series of supporting equipment. The working principle is to use heat energy to reduce the moisture content of the material, dry and granulate the material. It is mainly used in the processing of chemicals, pharmaceuticals, feed, and agricultural and sideline products. Specifically, after the liquid is passed into the pressure spray dryer, the heat source is sent in by the blower to mix with the liquid to complete the primary drying. The spray-dried product enters the vibrating fluidized bed for secondary drying (or cooling) before the product is produced.

[0003] This drying process has certain drawbacks:

[0004] First, due to the different characteristics of materials, some materials are suitable for preheating, drying and cooling in the secondary drying process, which can prevent the materials from softening at the drying temperature. After separating a part of the water at the preheating temperature and then entering the drying temperature, the materials can maintain their shape. Some materials are suitable for cooling, drying and cooling in the secondary drying process, because for these materials, cooling can make the materials brittle, and at the same time, the water inside the materials migrates to the outside, making them easier to dry. Some materials are suitable for direct cooling. These situations have caused the existing drying system to be unable to adapt to the secondary drying operations of various materials.

[0005] Second, the pressure spray dryer can use hot air that is higher than the softening temperature and thermal sensitive temperature of the material to instantly dry the material. However, at this temperature, the material is prone to become thermally sensitive and soften on the wall of the dryer, so there is a risk of the material sticking to the wall. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a combined drying or cooling system.

[0007] According to a combined drying or cooling system proposed by the utility model, it includes a pressure spray dryer and a vibrating fluidized bed. The discharge port of the pressure spray dryer is connected to the feed port of the vibrating fluidized bed, so that the material can enter the vibrating fluidized bed after being dried by the pressure spray dryer, that is, the material enters the pressure spray dryer to complete the primary drying, and then enters the vibrating fluidized bed to perform the secondary drying or cooling to form a product;

[0008] The difference between the combined drying or cooling system and the traditional drying system is that: the system also includes at least two first air inlet passages, one end of each of which is connected to a plurality of air inlets of the vibrating fluidized bed, and all the air inlets are distributed along the running direction of the material in the vibrating fluidized bed; each first air inlet passage is provided with a first gas heating device and a gas cooling device;

[0009] The advantage of such a setting is that the air supply operation of the vibrating fluidized bed is set to a variety of combined segmented operations, so that when the material runs in the vibrating fluidized bed, each first air inlet passage can choose to introduce cold air or hot air into the vibrating fluidized bed, and control the temperature of the air, so that the material can be subjected to multi-stage combined treatment according to the properties of the material; for example, low-temperature drying pretreatment can be performed first, then high-temperature drying, and finally cooling to prevent the material from softening and coking; for another example, cooling can be performed first, then drying, and then cooling, that is, the moisture inside the material is allowed to migrate to the outside and then dried; for another example, the material can be directly cooled; this multi-stage combined operation method can adapt to materials of different properties.

[0010] In some examples of the present invention, the first gas heating device may be a heat exchanger, or may be an electric heating group, a hot air furnace or other forms of heaters, and the gas cooling device may be a surface cooler.

[0011] In some examples of the present invention, each first air inlet passage is provided with a first blower for pumping external air into the first air inlet passage, that is, the first blower is used to provide power to supply air into the vibrating fluidized bed.

[0012] In some examples of the utility model, all the first air inlet passages are connected in parallel at one end away from the vibrating fluidized bed to a rotary dehumidifier, and the rotary dehumidifier is used to perform surface cooling dehumidification and rotary deep dehumidification on the air entering the first air inlet passage;

[0013] The advantages of such a design are as follows: compared with the conventional drying system, the secondary surface cooling is eliminated, and the heating or cooling of the air can be freely allocated according to the working conditions of the vibrating fluidized bed; for example, when the drying section is drying the material, the hot air from the rotary dehumidifier can be reheated to avoid the original air at about 40°C after passing through the rotor and then being cooled to about 15°C and then reheated, thus avoiding energy loss; for example, when the cooling section is cooling the material, the hot air from the rotary dehumidifier can be cooled to a specified temperature by an external surface cooler.

[0014] In some examples of the utility model, the vibrating fluidized bed also includes a plurality of air outlets, and all the air outlets of the vibrating fluidized bed are distributed along the running direction of the material in the vibrating fluidized bed, that is, the wind body acts as a medium to dry or cool the material and then can be discharged through multiple air outlets respectively, thereby preventing the wind body from mixing in the vibrating fluidized bed.

[0015] In some examples of the utility model, the drying or cooling system also includes a first air outlet passage, all air outlets of the vibrating fluidized bed are connected in parallel to the first air outlet passage, and a first cyclone dust collector is provided on the first air outlet passage, and the first cyclone dust collector is used to separate the material dust carried out by the wind body to prevent direct discharge and pollution of the environment.

[0016] In some examples of the present invention, a jacket is provided on the tower wall of the pressure spray dryer, and the air inlet of the jacket is connected to a second blower for introducing air into the jacket. The jacket is also provided with an air outlet. The jacket is a cold wall jacket, that is, the second blower is used to introduce air into the jacket to cool the tower wall of the pressure spray dryer to prevent the material from becoming heat-sensitive and softening on the wall surface, and the air that completes the heat exchange is discharged through the air outlet of the jacket.

[0017] In some examples of the present invention, the drying or cooling system further includes a feed pump, and the feed pump is used to pump the material into the spray gun in the pressure spray dryer.

[0018] In some examples of the present invention, the drying or cooling system also includes a second air inlet passage, on which a fourth air blower and a second gas heating device are provided, one end of which is connected to the air inlet of the pressure spray dryer, that is, the heat medium of the pressure spray dryer is also air, and the air blower is used to deliver air into the pressure spray dryer, and the second gas heating device can be a heat exchanger for heating the air.

[0019] In some examples of the present invention, the drying or cooling system also includes a second air outlet passage, the air outlet of the pressure spray dryer is connected to the second air outlet passage, and a second cyclone dust collector is provided on the second air outlet passage. After the air completes the primary drying as a heat medium, it is discharged through the second air outlet passage. The second cyclone dust collector is used to separate the material dust carried out by the wind body to prevent direct discharge and pollution of the environment.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of a combined drying or cooling system in an embodiment of the utility model.

[0023] Description of reference numerals:

[0024] Pressure spray dryer 1, a material outlet 11 of the pressure spray dryer, a jacket 12, an air inlet 121 of the jacket, a second air blower 122, an air outlet 123 of the jacket, a spray gun 13, an air inlet 14 of the pressure spray dryer, and an air outlet 15 of the pressure spray dryer;

[0025] A vibrating fluidized bed 2, a feed port 21 of the vibrating fluidized bed, an air inlet 22 of the vibrating fluidized bed, an air outlet 23 of the vibrating fluidized bed, and a discharge port 24 of the vibrating fluidized bed;

[0026] A first air inlet passage 3, a first gas heating device 31, a gas cooling device 32, a first air blower 33, and a rotary dehumidifier 34;

[0027] A first air outlet passage 4, a first cyclone dust collector 41, and a third air blower 42;

[0028] Feed passage 5, feed pump 51, material tank 52, water tank 53;

[0029] A second air inlet passage 6, a fourth air blower 61, a second gas heating device 62, and a filter 63;

[0030] A second air outlet passage 7, a second cyclone dust collector 71, and a fifth air blower 72;

[0031] Water film dust collector 8. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] Reference below Figure 1 Description of the embodiment provided by the utility model: a combined drying or cooling system.

[0037] See also Figure 1 The combined drying or cooling system includes a pressure spray dryer 1, a vibrating fluidized bed 2, and three first air inlet passages 3, wherein the discharge port 11 of the pressure spray dryer 1 is connected to the feed port 21 of the vibrating fluidized bed 2, so that the material can enter the vibrating fluidized bed 2 for secondary drying or cooling after being dried by the pressure spray dryer 1; and one end of all the first air inlet passages 3 is correspondingly connected to a plurality of air inlets 22 of the vibrating fluidized bed 2, and all the air inlets 22 are distributed along the running direction of the material in the vibrating fluidized bed 2; each first air inlet passage 3 is provided with a first gas heating device 31 and a gas cooling device 32.

[0038] Specifically, the vibrating fluidized bed 2 includes an upper bed body and a lower bed body that are softly connected to each other, that is, the upper bed body is relatively fixed, and the lower bed body can be driven by the vibration motor to vibrate, and the connection between the two will not affect each other's working state;

[0039] The feed port 21 of the vibrating fluidized bed 2 is arranged on the upper bed body and is fixedly connected to the pressure spray dryer 1, so that the discharge port 11 of the pressure spray dryer 1 is connected to the feed port 21 of the vibrating fluidized bed 2; the six air inlets 22 of the vibrating fluidized bed 2 are opened on the lower bed body, and the first air inlet passage 3 is provided with three, which correspond to 1 air inlet 22, 2 air inlets 22, and 3 air inlets respectively.

[0040] It should be noted that, in this embodiment, the first gas heating device 31 is a heat exchanger, and the gas cooling device 32 is a surface cooler. The air input into the three first air inlet passages 3 can be heated by the heat exchanger or cooled by the surface cooler according to the situation.

[0041] Please continue to see Figure 1 Each first air inlet passage 3 is provided with a first blower 33 for pumping external air into the first air inlet passage 3 .

[0042] Please continue to see Figure 1 The three first air inlet passages 3 are connected in parallel at one end away from the vibrating fluidized bed 2 and are connected to a rotary dehumidifier 34. The rotary dehumidifier 34 is used to perform surface cooling dehumidification and rotary deep dehumidification on the air entering the first air inlet passages 3.

[0043] Please continue to see Figure 1 The vibrating fluidized bed 2 also includes five air outlets 23 and a material outlet 24 . The five air outlets 23 of the vibrating fluidized bed 2 are distributed along the running direction of the material in the vibrating fluidized bed 2 .

[0044] Specifically, the air outlet 23 is arranged on the upper bed body, so that the air and the material can be discharged through the air outlet 23 after the heat exchange between the air and the material in the vibrating fluidized bed 2 is completed, and the discharge port 24 is arranged at the tail of the lower bed body, and the material is vibrated and transported to the tail of the lower bed body, and discharged through the discharge port 24 after secondary drying or cooling.

[0045] Please continue to see Figure 1 The drying or cooling system further comprises a first air outlet passage 4, and all the air outlets 23 of the vibrating fluidized bed 2 are connected in parallel to the first air outlet passage 4, so that the air medium enters the first air outlet passage 4 through the air outlet 23 after completing the operation in the vibrating fluidized bed 2;

[0046] Specifically, the first air outlet passage 4 is also provided with a first cyclone dust collector 41 and a third blower 42. All the air outlets 23 of the vibrating fluidized bed 2 are connected in parallel to the input end of the first cyclone dust collector 41. The first output end of the first cyclone dust collector 41 is connected to the third blower 42, and the second output end is connected to the discharge port 24 of the vibrating fluidized bed 2. That is, the air discharged from the vibrating fluidized bed 2 will carry dust of the material, and the first cyclone dust collector 41 is used to separate the dust. The separated dust is also sent out through the discharge port 24 of the vibrating fluidized bed 2, and the air is discharged through the third blower 42.

[0047] Please continue to see Figure 1 A jacket 12 is provided on the tower wall of the pressure spray dryer 1, an air inlet 121 of the jacket 12 is connected to a second air blower 122 for introducing air into the jacket, and an air outlet 123 is also provided on the jacket 12;

[0048] Specifically, the second blower 122 is used to introduce external air into the jacket to cool the tower wall of the pressure spray dryer 1 to prevent the material from softening and sticking.

[0049] Please continue to see Figure 1 The drying or cooling system further comprises a feed passage 5, one end of which is connected to the spray gun 13 in the pressure spray dryer 1, and a feed pump 51 is provided on the feed passage 5, and the feed pump 51 is used to pump the material into the spray gun 13;

[0050] More specifically, a material trough 52 and a water trough 53 are further provided on the feed passage 5. The material and water in the material trough 52 and the water trough 53 are mixed and then pumped into the pressure spray dryer 1 by the feed pump 51 to granulate the material.

[0051] Please continue to see Figure 1 The drying or cooling system further comprises a second air inlet passage 6, on which a fourth blower 61 and a second gas heating device 62 are provided, one end of which is connected to the air inlet 14 of the pressure spray dryer 1, that is, after the air is pumped into the second air inlet passage 6 by the fourth blower 61, it is heated by the second gas heating device 62 and then enters the pressure spray dryer 1 to dry the material;

[0052] Specifically, the second gas heating device 62 is a heat exchanger.

[0053] Please continue to see Figure 1 A filter 63 is also provided at one end of the second air inlet passage 6 away from the air inlet 14 of the pressure spray dryer 1, which is used to filter impurities in the air to prevent the impurities from contaminating the material.

[0054] Please continue to see Figure 1The drying or cooling system further comprises a second air outlet passage 7, and the air outlet 15 of the pressure spray dryer 1 is connected to the second air outlet passage 7, so that the heat medium air entering the pressure spray dryer 1 can be discharged through the second air outlet passage 7 after the operation is completed;

[0055] Please continue to see Figure 1 The second air outlet passage 7 is provided with a second cyclone dust collector 71 and a fifth blower 72. The second cyclone dust collector 71 is used to remove dust in the heat medium, and the fifth blower 72 is used to lead out the heat medium.

[0056] Specifically, the air outlet 15 of the pressure spray dryer 1 is connected to the input end of the second cyclone dust collector 71, the first output end of the second cyclone dust collector 71 is connected to the fifth blower 72, and the second output end is connected to the upper bed body of the vibrating fluidized bed 2, that is, the air discharged from the pressure spray dryer 1 will carry dust of the material, and the second cyclone dust collector 71 is used to separate the dust, and the separated dust is sent to the vibrating fluidized bed 2 for treatment through a pipeline, and the air is discharged through the fifth blower 72.

[0057] Please continue to see Figure 1 The drying or cooling system also includes a water film dust collector 8. The input ends of the third air blower 42 and the fifth air blower 72 are connected in parallel and then connected to the water film dust collector 8, so that the air medium enters the water film dust collector 8 for further dust removal and then is discharged.

[0058] According to a combined drying or cooling system provided by an embodiment of the utility model, a heat exchanger and a surface cooler both have a heat source or a cold source to exchange heat with air. The heat source can be steam, heat transfer oil, etc., and the cold source can be chilled water, chilled brine, etc.

[0059] According to an embodiment of the utility model, a combined drying or cooling system is provided, in which the specific structures and working principles of the pressure spray dryer 1, the vibrating fluidized bed 2, the heat exchanger, the surface cooler, the blower, the rotary dehumidifier, the cyclone dust collector, the water film dust collector 8, etc. have been explained in detail in the above embodiments and will not be repeated here.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A combined drying or cooling system, characterized in that: It includes a pressure spray dryer, a vibrating fluidized bed, and at least two first air inlet passages; The discharge port of the pressure spray dryer is connected to the feed port of the vibrating fluidized bed, so that the material can enter the vibrating fluidized bed after being dried by the pressure spray dryer; One end of all the first air inlet passages is connected to a plurality of corresponding air inlets of the vibrating fluidized bed, and all the air inlets are distributed along the running direction of the material in the vibrating fluidized bed; each of the first air inlet passages is provided with a first gas heating device and a gas cooling device.

2. A combined drying or cooling system according to claim 1, characterized in that: Each of the first air inlet passages is provided with a first blower for pumping external air into the first air inlet passage.

3. A combined drying or cooling system according to claim 2, characterized in that: All the first air inlet passages are connected in parallel at one end away from the vibrating fluidized bed and are connected to a rotary dehumidifier.

4. A combined drying or cooling system according to claim 2, characterized in that: The vibrating fluidized bed further comprises a plurality of air outlets, and all the air outlets of the vibrating fluidized bed are distributed along the running direction of the material in the vibrating fluidized bed.

5. A combined drying or cooling system according to any one of claims 1 to 4, characterized in that: The drying or cooling system further comprises a first air outlet passage, all air outlets of the vibrating fluidized bed are connected in parallel to the first air outlet passage, and a first cyclone dust collector is arranged on the first air outlet passage.

6. A combined drying or cooling system according to any one of claims 1 to 4, characterized in that: A jacket is arranged on the tower wall of the pressure spray dryer, an air inlet of the jacket is connected to a second air blower for introducing air into the jacket, and an air outlet is also arranged on the jacket.

7. A combined drying or cooling system according to any one of claims 1 to 4, characterized in that: The drying or cooling system further comprises a feed pump, which is used to pump materials into the spray gun in the pressure spray dryer.

8. A combined drying or cooling system according to any one of claims 1 to 4, characterized in that: The drying or cooling system further comprises a second air inlet passage, on which a fourth air blower and a second gas heating device are arranged, and one end of the second air inlet passage is connected to the air inlet of the pressure spray dryer.

9. A combined drying or cooling system according to any one of claims 1 to 4, characterized in that: The drying or cooling system further comprises a second air outlet passage, the air outlet of the pressure spray dryer is connected to the second air outlet passage, and a second cyclone dust collector is arranged on the second air outlet passage.

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