阅读说明：本技术 一种具备抗结剂独立添加装置的离心喷雾干燥系统 (Centrifugal spray drying system with independent anti-caking agent adding device ) 是由 王雪瑞 林科雄 徐赫 刘锦洪 于 2019-09-30 设计创作，主要内容包括：本发明公开一种具备抗结剂独立添加装置的离心喷雾干燥系统,涉及干燥器领域,包括冷风输送管、抗结剂独立添加装置和混料装置,冷风输送管连接在喷雾干燥塔的旋风分离器底部,抗结剂独立添加装置包括依次相连的程序控制装置、驱动装置和输送装置,输送装置配置有进料装置,输送装置连通冷风输送管,混料装置连接在冷风输送管的末端,混料装置连接有进料管和出料管。本发明通过在传统的离心喷雾干燥系统上增设抗结剂独立添加装置,实现抗结剂加入时机和加入量的独立控制,实现对不同性质微胶囊化粉剂所需抗结剂需求量的调整,还改善现有抗结剂加入方式导致的混合不均匀缺陷,提高微胶囊化粉剂的流动性,防止物料在管路内堆积搭桥导致堵塞。(The invention discloses a centrifugal spray drying system with an anti-caking agent independent adding device, which relates to the field of dryers and comprises a cold air conveying pipe, the anti-caking agent independent adding device and a mixing device, wherein the cold air conveying pipe is connected to the bottom of a cyclone separator of a spray drying tower, the anti-caking agent independent adding device comprises a program control device, a driving device and a conveying device which are sequentially connected, the conveying device is provided with a feeding device, the conveying device is communicated with the cold air conveying pipe, the mixing device is connected to the tail end of the cold air conveying pipe, and the mixing device is connected with a feeding pipe and a discharging pipe. According to the invention, the anticaking agent independent adding device is additionally arranged on the traditional centrifugal spray drying system, so that the addition time and the addition amount of the anticaking agent are independently controlled, the adjustment of the required anticaking agent amount of the microencapsulated powder with different properties is realized, the defect of uneven mixing caused by the existing anticaking agent adding mode is also improved, the fluidity of the microencapsulated powder is improved, and the blockage caused by the accumulation and bridging of materials in a pipeline is prevented.)

1. A centrifugal spray drying system with an independent anticaking agent adding device is characterized in that: the anti-caking agent independent adding device comprises a cold air conveying pipe, an anti-caking agent independent adding device and a mixing device, wherein the cold air conveying pipe is connected to the bottom of a cyclone separator of a spray drying tower, the anti-caking agent independent adding device comprises a program control device, a driving device and a conveying device which are sequentially connected, the conveying device is provided with a feeding device, the conveying device is communicated with the cold air conveying pipe, the mixing device is connected to the tail end of the cold air conveying pipe, and the mixing device is connected with a feeding pipe; under the control of the program control device, the driving device drives the conveying device to convey the anticaking agent towards the cold air conveying pipe, the anticaking agent enters the mixing device through the cold air conveying pipe and is mixed with the material input from the feeding pipe, and the mixed material is discharged from the discharging pipe.

2. The centrifugal spray-drying system with an independent anticaking agent addition device according to claim 1, wherein: the conveying device comprises a feeding groove, a feeding pipe and a feeding screw rod, the feeding pipe is sleeved on the feeding screw rod, one end of the feeding screw rod is connected with a driving device, the feeding groove and a cold air conveying pipe are connected with the feeding pipe, and the feeding groove is communicated with the feeding device.

3. the centrifugal spray-drying system with an independent anticaking agent addition device according to claim 2, wherein: the one end that is close to the cold wind conveyer pipe of conveying pipe is equipped with balanced pipe, and the conveying pipe passes through the butterfly valve with the cold wind conveyer pipe and realizes dismantling the connection.

4. The centrifugal spray-drying system with an independent anticaking agent addition device according to claim 2, wherein: the feeding device comprises a feeding hopper and an air hammer arranged on the outer side of the feeding hopper, the bottom of a cavity of the feeding hopper is hermetically connected with the feeding groove, and the air hammer is connected with a compressed air conveying end of the centrifugal spray drying system.

5. The centrifugal spray-drying system with an independent anticaking agent addition device according to claim 4, wherein: and the air hammer is provided with a time relay for controlling the periodic working frequency of the air hammer.

6. The centrifugal spray-drying system with an independent anticaking agent addition device according to claim 4, wherein: the opening part of feeding hopper is equipped with the top cap, top cap and feeding hopper swing joint.

7. The centrifugal spray-drying system with an independent anticaking agent addition device according to claim 2, wherein: the driving device comprises a driving motor and a reduction gearbox which are connected, the reduction gearbox is connected with the feeding screw rod through a coupler, and the driving motor is electrically connected with the program control device.

8. The centrifugal spray-drying system with an independent anticaking agent addition device according to claim 1, wherein: the program control device comprises a time relay, a controller and a frequency converter which are electrically connected in sequence, and the frequency converter is electrically connected with the driving device.

9. The centrifugal spray-drying system with an independent anticaking agent addition device according to claim 1, wherein: the material mixing device is a cyclone volute, the discharge pipe and the feeding pipe are connected with the cyclone volute in different directions, the direction of the discharge pipe and the direction of the cold air conveying pipe are arranged in the same longitudinal direction, and the direction of the feeding pipe is perpendicular to the direction of the cold air conveying pipe and the direction of the discharge pipe.

10. the centrifugal spray-drying system with an independent anticaking agent addition device according to claim 9, wherein: the cyclone volute is internally provided with a mixer aid which is one or a combination of more than two of a cone, a cylinder and a polygon, the diameter of the bottom surface of the cone is 0.4-0.7 times of that of the cyclone volute, and the height of the cone is 0.5-0.8 times of that of the cyclone volute.

Technical Field

The invention relates to the field of dryers, in particular to a centrifugal spray drying system with an independent anticaking agent adding device.

Background

Anticaking agents are also known as flow regulators, lubricants, and anticaking and slip agents and free-flowing agents. The object is a class of fine solid powders which are added to a matrix to improve the flowability of the matrix and to increase its anti-caking capacity. Anti-caking agents are currently widely used in various foods or food additives.

Microencapsulated powder particles often suffer from poor flowability due to frictional electrostatic interaction with the surface of processing machinery of a production device or a packaging material, and the powder particles can bridge and accumulate in a conveying pipeline to cause blockage. Moreover, the microencapsulated oil products have phenomena of caking, poor fluidity and the like to different degrees during the shelf life, especially products with high fat and core material containing liquid oil. In foreign countries, microencapsulated powdered oil products or other microencapsulated products are often added with an anticaking agent to improve the fluidity of the product and the anti-caking capability of the product, and achieve better effects. Due to the particularity of the surface structure of the microencapsulated powdered oil product, after the anticaking agent is adsorbed on the surface of the main base material, the friction force among particles is reduced and the fluidity of the particles is increased by eliminating the static charge and molecular acting force on the surface of the main base material. The anticaking agent can be used for improving the quality of microencapsulated powdered oil products currently produced in China so as to meet the requirements of various aspects.

The traditional centrifugal spray granulation system is not provided with an anticaking agent adding device, if the anticaking agent is added, the anticaking agent is added in a mixing bin of a pre-packaged product, the uniformity of mixing is difficult to control, and the labor cost and the time cost are increased. In addition, the addition amount of the anticaking agent needs to be controlled within a proper concentration range to achieve a good anticaking effect, and the anticaking agent is difficult to adjust in real time according to the real-time form of the material in the spray drying process by adopting a direct mixing mode with the material, so that the product is likely to accumulate and bridge in a pipeline to cause the blockage of a discharge port, the operation efficiency is reduced, the operation cost is increased, and the product yield is reduced.

Disclosure of Invention

In order to overcome the defects and shortcomings of the existing centrifugal spray drying system, the invention provides the centrifugal spray drying system with the independent anticaking agent adding device.

The specific technical scheme of the invention is as follows:

A centrifugal spray drying system with an anti-caking agent independent adding device comprises a cold air conveying pipe, the anti-caking agent independent adding device and a mixing device, wherein the cold air conveying pipe is connected to the bottom of a cyclone separator of a spray drying tower; under the control of the program control device, the driving device drives the conveying device to convey the anticaking agent towards the cold air conveying pipe, the anticaking agent enters the mixing device through the cold air conveying pipe and is mixed with the material input from the feeding pipe, and the mixed material is discharged from the discharging pipe.

Further, conveyor includes chute feeder, conveying pipe and pay-off hob, and the conveying pipe box is on the pay-off hob, and the one end and the drive arrangement of pay-off hob are connected, and chute feeder and cold wind conveyer pipe all are connected with the conveying pipe, and the chute feeder intercommunication feed arrangement.

Furthermore, the one end that is close to the cold wind conveyer pipe of conveying pipe is equipped with the balance pipe, and the conveying pipe passes through the butterfly valve with the cold wind conveyer pipe and realizes dismantling the connection.

Furthermore, the feeding device comprises a feeding hopper and an air hammer arranged on the outer side of the feeding hopper, the bottom of a cavity of the feeding hopper is hermetically connected with the feeding groove, and the air hammer is connected with a compressed air conveying end of the centrifugal spray drying system.

furthermore, a time relay for controlling the periodic working frequency of the air hammer is arranged on the air hammer.

Furthermore, a top cover is arranged at an opening of the feeding hopper and is movably connected with the feeding hopper.

Furthermore, the driving device comprises a driving motor and a reduction gearbox which are connected, the reduction gearbox is connected with the feeding screw rod through a coupler, and the driving motor is electrically connected with the program control device.

Furthermore, the program control device comprises a time relay, a controller and a frequency converter which are electrically connected in sequence, and the frequency converter is electrically connected with the driving device.

furthermore, the material mixing device is a cyclone volute, the discharge pipe and the feed pipe are connected with the cyclone volute in different directions, the direction of the discharge pipe and the direction of the cold air conveying pipe are arranged in the same longitudinal direction, and the direction of the feed pipe is perpendicular to the direction of the cold air conveying pipe and the direction of the discharge pipe.

Furthermore, a mixer is arranged in the cyclone volute and is one or a combination of more than two of a cone, a cylinder and a polygon, the diameter of the bottom surface of the cone is 0.4-0.7 times of that of the cyclone volute, and the height of the cone is 0.5-0.8 times of that of the cyclone volute.

Compared with the prior art, the invention has the following advantages:

1. the anti-caking agent independent adding device is additionally arranged on the traditional centrifugal spray drying system, so that the independent control of the adding time and the adding amount of the anti-caking agent is realized, the adjustment of the required anti-caking agent demand of the microencapsulated powders with different properties can be realized, the defect of uneven mixing caused by the existing anti-caking agent adding mode is improved, the fluidity of the microencapsulated powders is improved, the blockage of material outlets caused by the accumulation and bridging of materials in pipelines is prevented, and the weight yield of the product is improved (from 90% to 99%).

2. The butterfly valve is arranged at the joint of the feeding pipe and the cold air conveying pipe, so that the anti-caking agent independent adding device and the centrifugal spray drying system can be freely assembled and disassembled, and the independence and the sealing performance of the centrifugal spray drying system after the anti-caking agent independent adding device is disassembled are guaranteed. The anti-caking agent independent adding device provided by the invention is simple in structure and arrangement, quick to operate, good in maneuvering flexibility, convenient to operate and convenient to clean.

3. Because the discharge gate of conveying pipe links to each other with the cold wind conveyer pipe, causes the pipeline of conveying pipe to have the pressure difference in, can lead to the anticaking agent to impel forward smoothly. Along with the extension of operating time, the jam is piled up to the powder constantly increasing in the pay-off pipe, and the serious condition can lead to the pay-off hob to be died by the card, breaks off even, can effectively solve the appearance of this problem through set up a balance pipe on the pay-off pipe, guarantees anticaking agent transportation process's stability and practicality.

4. The mixer is additionally arranged in the cyclone volute, the mixer can uniformly disperse and disperse the piled and agglomerated microcapsule powder, the total surface area of the powder is increased, wind flow transmitted through the cold air conveying pipe can form cyclone, the contact area and the contact time of the microcapsule powder and the anticaking agent are effectively increased, and the mixing uniformity is improved.

5. The anti-caking agent independent adding device is preferably arranged on a cold air conveying pipe at the bottom of the primary cyclone separator, and the ventilation quantity and the temperature at the position are suitable for the adding condition of the anti-caking agent.

6. Because the anticaking agent passes through the anticaking agent independent adding device and evenly enters the cyclone volute along the tangential direction under the action of wind power along the cold wind conveying pipe in a proper amount, the effective contact mixing of the microcapsule powder material and the anticaking agent is realized under the synergistic action of the mixing aid, the fluidity of the material is obviously improved, the blocking condition caused by the stacking and bridging of the product in a material outlet pipeline is effectively prevented, and the material is further prevented from being brought out of a dust removal system by dust removal induced air, and the yield of the material product is improved.

Drawings

FIG. 1 is a schematic structural diagram of a centrifugal spray drying system with an independent anticaking agent adding device according to an embodiment of the present invention;

FIG. 2 is a left side view of a cyclone volute of an embodiment of the present invention;

FIG. 3 is an interior view of a cyclone volute of an embodiment of the invention;

Fig. 4 is a circuit diagram of a program control device according to an embodiment of the present invention.

Detailed Description

To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

As shown in fig. 1, the embodiment discloses a centrifugal spray drying system with an independent anti-caking agent adding device, which comprises a cold air conveying pipe 18, an independent anti-caking agent adding device and a mixing device 19, wherein the cold air conveying pipe 18 is connected to the bottom of a cyclone separator of a spray drying tower, the independent anti-caking agent adding device comprises a program control device, a driving device and a conveying device which are sequentially connected, the conveying device is provided with a feeding device, the conveying device is communicated with the cold air conveying pipe 18, the mixing device 19 is connected to the tail end of the cold air conveying pipe 18, and the mixing device 19 is connected with a feeding pipe 21 and a discharging pipe; under the control of the program control device, the driving device drives the conveying device to convey the anticaking agent towards the cold air conveying pipe 18, the anticaking agent enters the mixing device 19 through the cold air conveying pipe 18 and is mixed with the material input from the feeding pipe 21, and the mixed material is discharged from the discharging pipe 22.

The conveying device comprises a feeding groove 5, a feeding pipe 14 and a feeding screw rod 13, the feeding pipe 14 is sleeved on the feeding screw rod 13, one end of the feeding screw rod 13 is connected with a driving device, the feeding groove 5 and a cold air conveying pipe 18 are both connected with the feeding pipe 14, the feeding groove 5 is communicated with the feeding device, and the feeding pipe 14 is connected with the cold air conveying pipe 18 through a butterfly valve 16. The butterfly valve 16 can realize the free assembly and disassembly of the anti-caking agent independent adding device and the centrifugal spray drying system, and simultaneously ensure the independence and the sealing property of the centrifugal spray drying system after the anti-caking agent independent adding device is disassembled.

The feed chute 5 is a cuboid chute, the upper end of the feed chute is provided with an opening, the opening is a feed port of the feed chute 5, and the feed port of the feed chute 5 is connected with an outlet at the lower end of the feeding device. The feeding groove 5 is sleeved on the longitudinal outer side of one end, close to the driving device, of the feeding pipe 14 in a clearance mode, a feeding hole is formed in one end, close to the driving device, of the feeding pipe 14, and the feeding hole of the feeding pipe 14 is communicated with the feeding groove 5.

In a specific structure, the feeding pipe 14 is sleeved on the longitudinal outer side of the feeding screw rod 13 in a clearance mode, preferably, the axis of the feeding pipe 14 is parallel to the axis of the feeding screw rod 13, and further preferably, the diameter of the feeding pipe 14 is 2-5 times of the diameter of the feeding screw rod 13, and the diameter difference can ensure that the anticaking agent is conveyed smoothly to reduce extrusion abrasion.

The feeding pipe 14 is provided with a discharge port at one end close to the cold air conveying pipe 18, and preferably, the discharge port of the feeding pipe 14 is vertically communicated with the pipe wall of the cold air conveying pipe 18. A balance pipe 15 is arranged at the position close to the discharge port of the feeding pipe 14, the balance pipe 15 is communicated with the wall of the feeding pipe 14, and the balance pipe 15 is connected to the wall of the feeding pipe 14 between the end part of the feeding screw rod 13 and the butterfly valve 16. Preferably, the orifice of the balance tube 15 is circular, and the orifice diameter of the balance tube 15 is 1/2 of the diameter of the feeding tube 14.

The feeding device comprises a feeding hopper 4 and an air hammer 3 arranged on the outer side of the feeding hopper 4, the bottom of a cavity of the feeding hopper 4 is hermetically connected with a feeding groove 5, the air hammer 3 is arranged in the longitudinal middle of the outer side of the feeding hopper 4, and the air hammer 3 is connected with a compressed air conveying end 2 of the centrifugal spray drying system. Preferably, a time relay 11 is arranged on the air hammer 3, so that the periodic working frequency of the air hammer 3 is controlled, the anticaking agent is loosely accumulated in the feeding hopper 4 and the feeding groove 5, and the anticaking agent is prevented from bridging.

Preferably, the feeding hopper 4 has a straight cylindrical upper part, a tapered middle part with a large upper part and a small lower part, and a straight cylindrical lower part. Preferably, the opening part of the feeding hopper 4 is provided with a top cover 1, the top cover 1 is movably connected with the feeding hopper 4, and the top cover 1 and the feeding hopper 4 can be connected by a quick-opening flange.

The driving device comprises a driving motor 6 and a reduction gearbox 7 which are connected, the driving motor 6 is connected with an input shaft of the reduction gearbox 7, an output shaft of the reduction gearbox 7 is connected with a coupler 8, the reduction gearbox 7 is connected with a feeding screw rod 13 of the conveying device through the coupler 8, and the driving motor 6 is electrically connected with the program control device.

The program control device comprises a time relay 11, a controller 10 and a frequency converter 9 which are electrically connected in sequence, wherein the frequency converter 9 is electrically connected with the driving motor 6. The controller 10 may be a PLC controller or a single chip or other control system. The time relay 11 is a time relay existing on the market, for example, a time relay of model YOTOHT 4-41B. The time parameter set by the time relay 11 controls the start and the stop (time) of the driving motor 6, and the frequency conversion parameter set by the frequency converter 9 controls the rotating speed of the driving motor 6. The time relay 11 (adjusting time parameters) and the frequency converter 9 (adjusting rotating speed) are used for controlling the rotation time of the driving motor 6, so that the addition amount of the anticaking agent is controlled. Due to different requirements and usage amounts of the anti-caking agents of the microencapsulated powders with different properties, the anti-caking agents are supplied as required and distributed uniformly in a proper amount in the spray drying of the materials by adopting the program control device. The circuit diagram of the program control device is shown in figure 4.

As shown in fig. 2 and 3, the mixing device 19 is a cyclone volute, the discharge pipe 22 and the feed pipe 21 are connected to the cyclone volute in different directions, and the material enters the cyclone volute through the feed pipe 21, contacts and mixes with the anticaking agent introduced from the cold air delivery pipe 18, and is discharged through the discharge pipe 22. The discharge pipe 22 and the cold-air supply pipe 18 are connected to the side wall of the cyclone volute, and for good material discharge, the discharge pipe 22 is preferably oriented in the same longitudinal direction as the cold-air supply pipe 18. In order to achieve a good mixing-assisting effect, it is preferable that the feeding pipe 21 is connected to the end face of the cyclone volute, and the orientation of the feeding pipe 21 is set to be perpendicular to both the orientation of the cold-air delivery pipe 18 and the orientation of the discharging pipe 22.

Preferably, a mixer 20 is arranged inside the cyclone volute, the mixer 20 is located at the center of the bottom in the cavity of the cyclone volute, and the shape of the mixer 20 can be one of a cylinder, a cone and a polygon or a combination of two or more of the cylinders, the cone and the polygon. In this embodiment, as shown in fig. 3, the mixing aid 20 is preferably a cone, and more preferably, the diameter of the bottom surface of the cone is 0.4 to 0.7 times the diameter of the bottom surface of the cyclone volute, and the height of the cone is 0.5 to 0.8 times the height of the cyclone volute. The mixing aid 20 can uniformly disperse the piled and agglomerated microcapsule powder and increase the total surface area of the powder. The mixing aid 20 can also form cyclone by the wind flow input by the cold wind conveying pipe 18, effectively increase the contact area and contact time of the microcapsule powder and the anticaking agent, and improve the uniformity of mixing.

By adopting the centrifugal spray drying system with the independent anti-caking agent adding device, the anti-caking agent enters from the feed inlet of the feed chute 5 and covers the feed screw 13, when the feed screw 13 rotates, the anti-caking agent is pushed forwards through the feed screw 13 and is fed out through the feed inlet of the feed pipe 14, the phenomenon of unbalanced and unstable feed caused by negative pressure caused by air flow fed by the cold air conveying pipe 18 is controlled under the assistance of the balance pipe 15, and the centrifugal spray drying system can be better suitable for a spray drying system with the drying capacity of 50-200 kg/h.

By adopting the centrifugal spray drying system with the independent anticaking agent adding device, the anticaking agent uniformly and properly enters the cyclone volute along the tangential direction under the action of wind power along the cold wind conveying pipe 18 through the independent anticaking agent adding device, so that the microcapsule powder material and the anticaking agent are effectively contacted and mixed under the synergistic action of the mixing aid 20, the flowability of the material is obviously improved, the blocking condition caused by the accumulation and bridging of the product in a material outlet pipeline is effectively prevented, the material is further prevented from being brought out of a dedusting system by dedusting induced wind, and the yield of the material product is improved.

The centrifugal spray drying system with the independent anticaking agent adding device can be suitable for preparing food capsule powder, such as: amino acids, vitamins, seasonings, proteins, milk powder, pig blood powder, soy powder, coffee, tea powder, glucose, potassium sorbate, pectin, flavors and fragrances, starches and the like.

In addition, the centrifugal spray drying system with the independent anticaking agent adding device can also be suitable for preparation and conveying of other powder product materials with pressure difference in pipelines. Such as: ceramics such as alumina, zirconia, magnesia, titania, clay, china clay, various ferrites, and metal oxides; chemical products such as disperse dyes, active dyes, organic catalysts, white carbon black, yeast, washing powder, potassium carbonate, potassium phosphate, inorganic catalysts and the like.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.