CN216222971U

CN216222971U - Spray drier convenient to screen product

Info

Publication number: CN216222971U
Application number: CN202122385652.XU
Authority: CN
Inventors: 蒋中昕
Original assignee: Jiangsu Xiandao Drying Technology Co ltd
Current assignee: Jiangsu Xiandao Drying Technology Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-04-08
Anticipated expiration: 2031-09-29

Abstract

The utility model belongs to the field of dryers, and particularly relates to a spray dryer convenient for screening products, which comprises: the drying device, the separating device connected with the drying device, the screening device and the condensing device are respectively connected with the separating device; the screening device comprises a cylindrical shell, a first screen and a second screen, wherein the first screen and the second screen are positioned inside the cylindrical shell, the diameter of a mesh of the first screen is not larger than the upper diameter limit of a standard product, the diameter of a mesh of the second screen is not smaller than the lower diameter limit of the standard product, and the screening device is suitable for screening according to the particle size of solids. The utility model can improve the collection rate of products in the spray drying process, reduce the product loss and standardize the prepared products.

Description

Spray drier convenient to screen product

Technical Field

The utility model relates to the field of dryers, in particular to a spray dryer convenient for screening products.

Background

The spray dryer is a continuous normal pressure dryer, sprays liquid materials into mist by using special equipment, and leads the liquid materials to be in contact with hot air to be dried, and is used for drying some heat-sensitive liquid, suspension and viscous liquid, and also used for drying fuel, midbody, soap powder, inorganic salt and the like; however, the current spray dryer on the market can not standardize the particle diameter, and the product collection rate is not high, and the loss is large.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: solves the problem that the existing spray dryer can not produce products meeting the diameter requirement.

The technical scheme adopted by the utility model for solving the technical problems is as follows: there is provided a spray dryer for facilitating screening of products, comprising: the drying device, the separating device connected with the drying device, the screening device and the condensing device are respectively connected with the separating device; the screening device comprises a cylindrical shell, a first screen and a second screen, wherein the first screen and the second screen are positioned inside the cylindrical shell, the diameter of a mesh of the first screen is not larger than the upper diameter limit of a standard product, the diameter of a mesh of the second screen is not smaller than the lower diameter limit of the standard product, and the screening device is suitable for screening according to the particle size of solids.

Further, the drying device comprises a drying main machine, an air inlet positioned on one side of the drying main machine, an atomizer positioned on the top of the drying main machine, a feeding pipeline connected with the atomizer, and a first discharge hole connected with the bottom of the drying main machine; wherein the feed liquid is suitable for entering the drying main machine through a feed pipeline and is converted into fog drops through an atomizer; and the air inlet is suitable for conveying hot air into the drying main machine so as to dry the feed liquid into a solid-gas mixture.

Further, the drying main machine comprises a cylinder, a cleaning pump positioned in the cylinder, a cone positioned at the bottom of the cylinder and a first discharge hole positioned at the bottom of the cone; the first discharge port conveys a solid-gas mixture in the drying main machine to the separation device through a first discharge pipeline; and the cleaning pump is suitable for spraying water into the column body after the solid-gas mixture is output so as to clean the interior of the column body.

Further, the separation device comprises a cyclone separator and a bag filter; the upper part of the cyclone separator is connected with the upper part of the bag filter through a first gas transmission pipeline; the lower part of the cyclone separator is connected with the lower part of the bag filter through a second discharge pipeline; wherein the cyclone separator is suitable for carrying out first separation on the solid-gas mixture, so that the gas subjected to the first separation is conveyed to a bag filter through a first gas conveying pipeline for carrying out second separation.

Further, the upper part of the bag filter is connected with the condensing device through a second gas transmission pipeline so as to transmit the gas separated for the second time to the condensing device.

Furthermore, at least four connectors are arranged on the second discharge pipeline; wherein the first connector is connected with the lower part of the cyclone separator, the second connector is connected with the lower part of the bag filter, the third connector is connected with the screening device, the fourth connector is connected with the air blower, and air is blown into the second discharge pipeline so as to convey the solids separated for the first time and the solids separated for the second time to the screening device.

Further, the first screen and the second screen are suitable for being horizontally arranged at intervals so as to divide the interior of the cylindrical shell into a first chamber, a second chamber and a third chamber; and the first chamber is connected with the second discharge pipeline so as to sieve the solids separated for the first time and the solids separated for the second time into large-diameter unqualified products positioned in the first chamber, qualified products positioned in the second chamber and small-diameter unqualified products positioned in the third chamber.

Further, a first feeding pipeline, a second feeding pipeline and a third feeding pipeline are respectively arranged on the first chamber, the second chamber and the third chamber; the third chamber is connected with the condensing device through a third feeding pipeline, and when the first feeding pipeline and the second feeding pipeline are closed, the unqualified small-diameter products are conveyed to the condensing device through the third feeding pipeline; when the second feeding pipeline and the third feeding pipeline are closed, the large-diameter unqualified products are conveyed to the condensing device through the first feeding pipeline; when the first feeding pipeline and the third feeding pipeline are closed, qualified products are conveyed to the collecting area through the second feeding pipeline.

Furthermore, the condensing device comprises a condenser, a condensing pipe positioned in the condenser and a water outlet pipeline connected with the lower part of the condenser; refrigerant flows in the condensation pipe to liquefy the gas separated for the second time, so as to dissolve the products with unqualified large diameter and unqualified small diameter conveyed by the first feeding pipe and the third feeding pipe, and the products are collected through the water outlet pipe.

Furthermore, the condensing device also comprises a feed inlet positioned at the upper part of the condenser so as to introduce feed liquid or water into the condenser for adjusting the concentration of the feed liquid.

The utility model has the beneficial effects that: according to the spray dryer disclosed by the utility model, through the matching of the drying device, the separating device, the screening device and the condensing device, the collection rate of products in the spray drying process is improved, the product loss is reduced, products which do not meet the standard diameter can enter the drying process again to be made into dried particles again, and the utilization rate of materials is ensured.

Drawings

The utility model is further illustrated by the following figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the screening device A-A of FIG. 1;

FIG. 3 is a schematic of a first screen configuration;

FIG. 4 is a cross-sectional view of the condensing unit B-B of FIG. 1;

FIG. 5 is a schematic view of the structure of the separation apparatus

Fig. 6 is a schematic configuration diagram of the drying apparatus.

In the figure:

the drying device comprises a drying device 1, a drying host 11, a first discharge port 111, an atomizer 12, a cleaning pump 13, an air inlet 14, a first discharge pipeline 15, a feeding pipeline 16 and a water discharge port 17;

the separation device 2, the cyclone separator 21, the bag filter 22, the first gas transmission pipeline 23, the second gas transmission pipeline 24 and the second discharge pipeline 25;

the screening device 3, the cylindrical shell 31, the first chamber 311, the first feeding pipeline 3111, the second chamber 312, the second feeding pipeline 3121, the third chamber 313, the third feeding pipeline 3131, the first screen 32, the second screen 33, the blower 34, the first electromagnetic valve 35, the second electromagnetic valve 36, the third electromagnetic valve 37, and the PLC controller 38;

condensing unit 4, condenser 41, condenser pipe 411, refrigerant inlet 4111, refrigerant outlet 4112, water outlet pipe 42 and feed inlet 43.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present embodiment provides a spray dryer for facilitating screening of products, comprising: the device comprises a drying device 1, a separating device 2 connected with the drying device 1, a screening device 3 and a condensing device 4 which are respectively connected with the separating device 2; wherein the drying device 1 is adapted to dry the feed liquid to form a solid-gas mixture, and is connected to the separation device 2 via a first discharge conduit 15, such that the dried product is conveyed to the separation device 2; the separation device 2 is suitable for separating gas from solid in a solid-gas mixture so as to convey the gas and the solid to the condensing device 4 and the screening device 3 through a second gas conveying pipeline 24 and a second discharge pipeline 25 respectively; the screening device 3 is suitable for screening according to the particle size of the solid; the condensing device 4 is suitable for condensing and liquefying the gas to enter the drying device 1 again; by the aid of the spray dryer, the diameter of a product can be controlled, and the production quality of the product is improved.

Specifically, as shown in fig. 1 and fig. 6, the drying device 1 includes a main drying machine 11, an air inlet 14 located at one side of the main drying machine 11, an atomizer 12 located at the top of the main drying machine 11, a feeding pipe 16 connected to the atomizer 12, a cleaning pump 13 located beside the atomizer 12, and a first discharge port 111 connected to the bottom of the main drying machine 11; wherein the feed liquid enters the drying main machine 11 through the feed pipeline 16; the drying main machine 11 consists of a cylinder and a cone, the bottom of the cone is provided with a first discharge hole 111, and the first discharge hole is connected with a first discharge pipeline 15 and is suitable for discharging a dried product; the air inlet 14 is positioned at one side of the cylindrical part of the main drying machine 11 and is used for conveying hot air into the main drying machine 11 to exchange heat with the fog drops to complete instant evaporation and instant drying, so that a product of dry powder particles is obtained; the top of the drying main machine 11 is provided with an atomizer 12, and the atomizer 12 is connected with a feeding pipeline 16 and is suitable for converting feed liquid into fog drops; the cleaning pump 13 is located in the drying main machine 11 and is suitable for spraying water into the column body after the solid-gas mixture is output so as to clean the inside of the column body, the waste water left after cleaning is discharged through a water outlet 17 on the first discharging pipeline 15, and then hot air is introduced through the air inlet 14 to dry the inside of the drying main machine 11.

Specifically, referring to fig. 1 and 5, the separation device 2 includes a cyclone separator 21, a bag filter 22, a first gas transmission pipeline 23, a second gas transmission pipeline 24, and a second discharge pipeline 25; wherein the second discharge pipeline 25 is provided with at least four connectors, the first connector is connected with the lower part of the cyclone separator 21, the second connector is connected with the lower part of the bag filter 22, the third connector is connected with the screening device 3, and the fourth connector is connected with the blower 34; the side edge of the cyclone separator 21 is connected with the first discharge pipeline 15, and a product dried in the drying host machine 11 enters the cyclone separator 21 through the first discharge pipeline 15 to perform first separation of a solid-gas mixture; the bottom of the cyclone separator 21 is connected with a second discharge pipeline 25, and the separated product enters the second discharge pipeline 25; the top of the cyclone separator 21 is connected with a first gas transmission pipeline 23, and the separated gas is transmitted to a bag filter 22; when the gas is conveyed to the bag filter 22, the bag filter 22 performs a second separation, the bottom of the bag filter 22 is connected with a second discharge pipeline 25, and the product is separated and then enters the second discharge pipeline 25; the upper part of the bag filter 22 is connected to the condensing unit 4 through a second gas transfer pipe 24 to transfer the second separated gas to the condensing unit 4.

Specifically, referring to fig. 1 to 3, the screening apparatus 3 includes a cylindrical housing 31, a first screen 32 and a second screen 33 disposed in the cylindrical housing 31, the first screen 32 and the second screen 33 being horizontally spaced to divide the interior of the cylindrical housing 31 into a first chamber 311, a second chamber 312, a third chamber 313, a first solenoid valve 35 disposed at a position where the cylindrical housing 31 is connected to a first feeding pipe 3111, a second solenoid valve 36 disposed at a position where the cylindrical housing 31 is connected to a second feeding pipe 3121, a third solenoid valve 37 disposed at a position where the cylindrical housing 31 is connected to a third feeding pipe 3131, and a PLC controller 38 disposed on the cylindrical housing 31; the PLC 38 is used for controlling the on and off of the first electromagnetic valve 35, the second electromagnetic valve 36 and the third electromagnetic valve 37; the diameter of the mesh of the first screen 32 is equal to the upper diameter limit of the standard product, so that the product with a diameter larger than the standard product is retained in the first chamber 311; the mesh diameter of the second screen 33 is equal to the lower diameter limit of the standard product, so that the product with an excessively small diameter enters the third feeding duct 3131 by the blower 34, and the product meeting the standard is collected through the second feeding duct 3121; when the blower 34 is turned on and the first electromagnetic valve 35 and the second electromagnetic valve 36 are closed, the product in the second discharge pipeline 25 is blown into the screening device 3 by the blower 34, passes through the first screen 32 and the second screen 33, and is conveyed to the condensing device 4 through the third feeding pipeline 3131; when the second electromagnetic valve 36 and the third electromagnetic valve 37 are closed, the unqualified products with large diameters are conveyed to the condensing device 4 through the first conveying pipeline 3111; when the first electromagnetic valve 35 and the third electromagnetic valve 37 are closed, the qualified products are conveyed to the collecting area through the second conveying pipeline 3121

Specifically, referring to fig. 1 and 4, the condensing device 4 includes a condenser 41, a third feeding pipe 3131 connected to the top of the condenser 41, a water outlet pipe 42 connected to the bottom of the condenser 41, and a feeding hole 43 located at the upper part of the condenser 41; a condenser pipe 411 is arranged in the condenser 41, a refrigerant inlet 4111 of the condenser pipe 411 is arranged at the top of the condenser 41, and a refrigerant outlet 4112 of the condenser pipe 411 is arranged at the bottom of the condenser 41 and is used for inputting a cooling medium to achieve the purpose of condensation; one side of the condenser 41 is connected with the second gas transmission pipeline 24, hot air and solvent steam enter the condenser 41 through the second gas transmission pipeline 24, and the solvent steam is liquefied in the condenser 41; the feed inlet is suitable for introducing feed liquid or water into the condenser 41, the top end of the condenser 41 is connected with a third feed pipeline 3131 for adjusting the concentration of the feed liquid, and products which do not meet the standard enter the condenser 41 through the third feed pipeline 3131 under the action of the air blower 34 to be mixed with the solvent to form the feed liquid again; the bottom of the condenser 41 is connected to a water outlet line 42, and the solvent and the product are mixed in the condenser 41 to form a feed liquid, and the feed liquid enters the water outlet line 42 to be collected and then is input into the feed line 16 again.

In summary, in the spray dryer, a liquid material enters the atomizer 12 through the feeding pipeline 16, the atomizer 12 converts the liquid material into mist, meanwhile, hot air enters through the air inlet 14, the mist liquid material is converted into a dry particle product through heat transfer, the product enters the first discharging pipeline 15 through the first discharging port 111 and is carried to the cyclone separator 21 through air flow, first gas-solid separation is performed in the cyclone separator 21, and a first part of the separated product enters the second discharging pipeline 25; the part separated in the cyclone separator 21 enters a bag filter 22 through a first gas transmission pipeline 23 for secondary separation, the separated gas part enters a condenser 41 through a second gas transmission pipeline 24, and the product enters a second discharge pipeline 25; after entering the second discharging pipeline 25, the product is blown into the screening device 3 by the blower 34, the mesh diameter of the first screen 32 in the screening device 3 is equal to the upper limit of the standard diameter, the diameter of the second screen 33 is equal to the lower limit of the standard diameter, the product meeting the standard is collected by the second feeding pipeline 3121, the product not meeting the standard enters the first feeding pipeline 3111 and the third feeding pipeline 3121 by the cooperation of the PLC controller 38 with the first electromagnetic valve 35 arranged on the first feeding pipeline 3111, the second electromagnetic valve 36 arranged on the second feeding pipeline 3121, and the third electromagnetic valve 37 arranged on the third feeding pipeline 3131, the product not meeting the standard enters the first feeding pipeline 3111 and the third feeding pipeline 3121 by the air flow generated by the blower 34, the first feeding pipeline 3111 and the third feeding pipeline 3131 are connected and finally connected with the condenser 41, the product not meeting the standard enters the condenser 41, and the gas separated from the bag filter 22 enters the condenser 41 by the second gas conveying pipeline 24, the solvent vapor is liquefied under the action of the condenser 41 and mixed with the product which does not meet the standard and enters the condenser 41 to become feed liquid again; the feed liquid is collected by flowing out through outlet conduit 42 and then reintroduced into feed conduit 16 to re-enter the drying process.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.

In light of the foregoing description of preferred embodiments in accordance with the utility model, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A spray dryer for facilitating screening of products, comprising: the drying device, the separating device connected with the drying device, the screening device and the condensing device are respectively connected with the separating device; the screening device comprises a cylindrical shell, a first screen and a second screen, wherein the first screen and the second screen are positioned inside the cylindrical shell, the diameter of a mesh of the first screen is not larger than the upper diameter limit of a standard product, the diameter of a mesh of the second screen is not smaller than the lower diameter limit of the standard product, and the screening device is suitable for screening according to the particle size of solids.

2. The spray dryer of claim 1, wherein the drying device comprises a main drying machine, an air inlet at one side of the main drying machine, an atomizer at the top of the main drying machine, a feeding pipeline connected with the atomizer, and a first discharge outlet connected with the bottom of the main drying machine; wherein the feed liquid is suitable for entering the drying main machine through a feed pipeline and is converted into fog drops through an atomizer; and the air inlet is suitable for conveying hot air into the drying main machine so as to dry the feed liquid into a solid-gas mixture.

3. The spray dryer of claim 2, wherein the drying main body comprises a cylinder, a washing pump located in the cylinder, a cone located at the bottom of the cylinder, and a first discharge port located at the bottom of the cone; the first discharge port conveys a solid-gas mixture in the drying main machine to the separation device through a first discharge pipeline; and the cleaning pump is suitable for spraying water into the column body after the solid-gas mixture is output so as to clean the interior of the column body.

4. The spray dryer of claim 1, wherein the separation device comprises a cyclone separator and a bag filter; the upper part of the cyclone separator is connected with the upper part of the bag filter through a first gas transmission pipeline; the lower part of the cyclone separator is connected with the lower part of the bag filter through a second discharge pipeline; wherein the cyclone separator is suitable for carrying out first separation on the solid-gas mixture, so that the gas subjected to the first separation is conveyed to a bag filter through a first gas conveying pipeline for carrying out second separation.

5. A spray dryer according to claim 4 wherein the upper part of the bag filter is connected to the condensing means by a second gas duct to convey the second separated gas to the condensing means.

6. A spray dryer according to claim 4 wherein the second discharge conduit is provided with at least four connectors; wherein the first connector is connected with the lower part of the cyclone separator, the second connector is connected with the lower part of the bag filter, the third connector is connected with the screening device, the fourth connector is connected with the air blower, and air is blown into the second discharge pipeline so as to convey the solids separated for the first time and the solids separated for the second time to the screening device.

7. The spray dryer of claim 1, wherein the first screen and the second screen are adapted to be horizontally spaced apart to divide the interior of the cylindrical housing into a first chamber, a second chamber, and a third chamber; and the first chamber is connected with the second discharge pipeline so as to sieve the solids separated for the first time and the solids separated for the second time into large-diameter unqualified products positioned in the first chamber, qualified products positioned in the second chamber and small-diameter unqualified products positioned in the third chamber.

8. The spray dryer of claim 7, wherein the first chamber, the second chamber and the third chamber are respectively provided with a first feeding pipeline, a second feeding pipeline and a third feeding pipeline; the third chamber is connected with the condensing device through a third feeding pipeline, and when the first feeding pipeline and the second feeding pipeline are closed, the unqualified small-diameter products are conveyed to the condensing device through the third feeding pipeline; when the second feeding pipeline and the third feeding pipeline are closed, the large-diameter unqualified products are conveyed to the condensing device through the first feeding pipeline; when the first feeding pipeline and the third feeding pipeline are closed, qualified products are conveyed to the collecting area through the second feeding pipeline.

9. The spray dryer of claim 1, wherein the condensing means comprises a condenser, a condensing pipe located inside the condenser, and a water outlet pipe connected to a lower portion of the condenser; refrigerant flows in the condensation pipe to liquefy the gas separated for the second time, so as to dissolve the products with unqualified large diameter and unqualified small diameter conveyed by the first feeding pipe and the third feeding pipe, and the products are collected through the water outlet pipe.

10. A spray dryer according to claim 9 wherein the condensing means further comprises a feed inlet located in the upper part of the condenser for feeding feed liquid or water into the condenser for adjusting the concentration of the feed liquid.