A spray drying apparatus for producing functional sugar alcohols

Abstract

This utility model discloses a spray drying device for producing functional sugar alcohols, including a raw material tank connected to a hot air distributor via a feed pump, and the hot air distributor connected to a drying tower. A hot air heater and an air intake fan are sequentially connected to the inlet of the hot air distributor. A vibrating fluidized bed is connected to the bottom of the drying tower via a moisture detector. An exhaust port is provided at the top of the drying tower, and a cyclone separator is connected to the exhaust port. The discharge port of the cyclone separator is connected to a powder return pipe, which is connected to the drying tower. The exhaust port of the cyclone separator is connected to a water film dust collector, which is connected to an electrostatic absorption device. The electrostatic absorption device is connected to the inlet of a turbocharger fan, and the outlet of the turbocharger fan is connected to the inlet of the hot air heater. A steam pipeline is also connected to the inlet of the turbocharger fan via a first valve. This utility model improves the powder recovery rate, reduces powder loss, and can also recover waste heat, reducing energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of functional sugar alcohol production and processing technology, specifically to a spray drying device for producing functional sugar alcohols. Background Technology

[0002] As the production technology of functional sugar alcohols matures, various industries are placing increasingly stringent quality requirements on their products. Particle size and moisture content are key factors influencing product quality. Precise production control can flexibly meet the needs of different customers and support differentiated competition. Spray drying achieves instantaneous drying of products by atomizing liquid materials and bringing them into contact with hot air, controlling both moisture content and particle size. It is widely used in the processing of heat-sensitive materials. However, drying equipment generally suffers from high energy consumption, product loss, and poor drying uniformity, resulting in a wide particle size distribution and a low final product yield. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a spray drying apparatus for producing functional sugar alcohols.

[0004] This utility model is achieved through the following technical solution:

[0005] A spray drying apparatus for producing functional sugar alcohols includes a raw material tank connected to a hot air distributor via a feed pump, and the hot air distributor connected to a drying tower. A hot air heater and an air inlet fan are sequentially connected to the inlet of the hot air distributor. A vibrating fluidized bed is connected to the bottom of the drying tower via a moisture detector. A temperature regulating device is installed at the vibrating fluidized bed, and a vibrating screen is installed at the outlet of the vibrating fluidized bed. An exhaust port is provided at the top of the drying tower, and the exhaust port is connected to the inlet of a primary cyclone separator. The air outlet is connected to the feed inlet of the secondary cyclone separator. The discharge outlets of both the primary and secondary cyclone separators are connected to the powder return pipe, which is equipped with a powder return fan and connected to the drying tower. The air outlet of the secondary cyclone separator is connected to the water film dust collector via an exhaust fan. The water film dust collector is connected to the electrostatic absorption device, which is connected to the inlet of the turbocharger. The outlet of the turbocharger is connected to the inlet of the hot air heater. The inlet of the turbocharger is also connected to a steam pipeline via a first valve.

[0006] Preferably, an air inlet filter is provided at the inlet end of the air inlet fan.

[0007] Preferably, the temperature regulating device is a hot air blower.

[0008] Preferably, a packaging machine is provided at the outlet end of the vibrating screen.

[0009] Preferably, the powder return pipe is equipped with a powder return three-way valve, the first outlet of which is connected to the top of the drying tower, and the second outlet of which is connected to the bottom of the drying tower.

[0010] Preferably, a steam branch pipe is connected to the steam pipe at the inlet end of the first valve, and the steam branch pipe is connected to the inlet end of the hot air heater. A second valve is installed on the steam branch pipe.

[0011] Preferably, a nano-sized filter screen is provided at the air outlet of the secondary cyclone separator.

[0012] The beneficial effects of this utility model are reflected in the following aspects: the hot air distributor ensures that the material and the heating medium are in full and uniform contact, improving the uniformity of material drying; the exhaust system adopts a multi-stage cyclone separator, and the secondary cyclone separator is equipped with a nano-level filter screen. The added electrostatic absorption device can adsorb nano-level particles, further improving the powder recovery rate and reducing powder loss; a waste heat recovery device is set up to further reduce the energy consumption of the product; the discharge system and temperature regulation device are linked and regulated by an online moisture detector to accurately control the moisture content of the material; and the three-way valve of the powder return system can select the powder return direction according to the different particle sizes. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0014] Figure 1 This is a structural view of the present invention.

[0015] In the attached diagram: 1. Raw material tank; 2. Feed pump; 3. Hot air distributor; 4. Drying tower; 5. Vibrating fluidized bed; 6. Vibrating screen; 7. Packaging machine; 8. Primary cyclone separator; 9. Secondary cyclone separator; 10. Exhaust fan; 11. Water film dust collector; 12. Electrostatic absorption device; 13. Turbocharger fan; 14. Inlet air filter; 15. Inlet air fan; 16. Hot air heater; 17. Temperature control device; 18. Moisture analyzer; 19. Return powder three-way valve; 20. Return powder fan; 21. Second valve; 22. Steam pipeline; 23. First valve. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0018] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” may be used herein to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] The present invention will now be described in detail with reference to the accompanying drawings:

[0021] A spray drying apparatus for producing functional sugar alcohols includes a raw material tank 1, which is connected to a hot air distributor 3 via a feed pump 2. The hot air distributor 3 is connected to a drying tower 4. A hot air heater 16 and an air inlet fan 15 are connected sequentially to the inlet end of the hot air distributor 3. The material is dried by exchanging heat with the hot air in the air inlet system of the hot air distributor 3. A vibrating fluidized bed 5 is connected to the bottom of the drying tower 4 via a moisture detector 18. A temperature regulating device 17 is installed at the vibrating fluidized bed 5. The moisture detector 18 can detect the moisture content of the material and feed the detection result back to the temperature regulating device 17, so that the temperature regulating device 17 blows out hot air at the required temperature to ensure the stability of the material's moisture content. A vibrating screen 6 is installed at the outlet end of the vibrating fluidized bed 5, and a packaging machine 7 is installed at the outlet end of the vibrating screen 6.

[0022] The top of the drying tower 4 is equipped with an exhaust port, which is connected to the feed inlet of the primary cyclone separator 8. The exhaust port of the primary cyclone separator 8 is connected to the feed inlet of the secondary cyclone separator 9. A nano-scale filter screen is installed at the exhaust port of the secondary cyclone separator 9. The discharge ports of both the primary cyclone separator 8 and the secondary cyclone separator 9 are connected to a powder return pipe. A powder return fan 20 is installed on the powder return pipe, which is connected to the drying tower 4. The exhaust port of the secondary cyclone separator 9 is connected to a water film dust collector 11 through an exhaust fan 10. The water film dust collector 11 is connected to an electrostatic absorption device 12, which is connected to the inlet of a turbocharger fan 13. The fine powder and hot air generated in the drying tower 4 enter the first-stage cyclone separator 8 and the second-stage cyclone separator 9 through the exhaust port on the top of the drying tower 4 for separation. The discharged hot air and nano-sized particles enter the water film dust collector 11 after passing through the exhaust fan 10. Most of the particles are recycled after being mixed with water. Some particles and hot air are discharged from the top of the water film dust collector 11 and then pass through the electrostatic absorption device 12 to absorb all the particles. Then the hot air is compressed and pressurized by the turbocharger fan 13 and enters the hot air heater 16 as a heat medium.

[0023] The outlet end of the turbocharger blower 13 is connected to the inlet end of the hot air heater 16. The inlet end of the turbocharger blower 13 is also connected to a steam pipe 22 through a first valve 23. A steam branch pipe is connected to the steam pipe 22 at the inlet end of the first valve 23. The steam branch pipe is connected to the inlet end of the hot air heater 16. A second valve 21 is installed on the steam branch pipe. The steam pipe 22 can provide a high-temperature steam source. After the high-temperature steam is input into the hot air heater 16, it exchanges heat with the air drawn in by the air intake blower 15. The generated hot air is then input into the hot air distributor 3. The high-temperature steam can directly enter the hot air heater 16 through the second valve 21, or it can enter the hot air heater 16 through the turbocharger blower 13 via the first valve 23.

[0024] The air intake fan 15 is equipped with an air intake filter 14, which can filter natural air and then input it into the hot air heater 16.

[0025] The temperature regulating device 17 is a hot air blower, which is controlled by a controller. The controller can receive signals from the moisture detector and control the power of the hot air blower.

[0026] The powder return pipe is equipped with a powder return three-way valve 19. The first outlet of the powder return three-way valve 19 is connected to the top of the drying tower 4, and the second outlet of the powder return three-way valve 19 is connected to the bottom of the drying tower 4. The opening direction of the powder return three-way valve 19 can be selected according to the different requirements of product particle size.

[0027] Preferably, guide vanes and porous gas distribution pipes are installed inside the hot air distributor 3 to ensure uniform gas distribution and full contact between the gas and the material, so that the material dries evenly.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A spray drying apparatus for producing functional sugar alcohols, comprising a raw material tank (1), characterized in that: The raw material tank (1) is connected to the hot air distributor (3) via the feed pump (2), and the hot air distributor (3) is connected to the drying tower (4). The inlet end of the hot air distributor (3) is connected to the hot air heater (16) and the air inlet fan (15) in sequence. The bottom of the drying tower (4) is connected to the vibrating fluidized bed (5) via the moisture detector (18). The vibrating fluidized bed (5) is equipped with a temperature regulating device (17), and the outlet end of the vibrating fluidized bed (5) is equipped with a vibrating screen (6). The top of the drying tower (4) is equipped with an exhaust port, which is connected to the feed port of the first-stage cyclone separator (8), and the exhaust port of the first-stage cyclone separator (8) is connected to the second-stage cyclone separator (9). The feed inlets of the first-stage cyclone separator (8) and the second-stage cyclone separator (9) are connected to the return powder pipe. The return powder pipe is equipped with a return powder fan (20) and is connected to the drying tower (4). The outlet of the second-stage cyclone separator (9) is connected to the water film dust collector (11) through the exhaust fan (10). The water film dust collector (11) is connected to the electrostatic absorption device (12). The electrostatic absorption device (12) is connected to the inlet of the turbocharger fan (13). The outlet of the turbocharger fan (13) is connected to the inlet of the hot air heater (16). The inlet of the turbocharger fan (13) is also connected to a steam pipeline (22) through the first valve (23).

2. The spray drying apparatus for producing functional sugar alcohols as described in claim 1, characterized in that: The inlet of the air intake fan (15) is equipped with an air intake filter (14).

3. The spray drying apparatus for producing functional sugar alcohols as described in claim 1, characterized in that: The temperature regulating device (17) is a hot air blower.

4. The spray drying apparatus for producing functional sugar alcohols as described in claim 1, characterized in that: A packaging machine (7) is installed at the outlet end of the vibrating screen (6).

5. The spray drying apparatus for producing functional sugar alcohols as described in claim 1, characterized in that: The return powder pipe is equipped with a return powder three-way valve (19). The first outlet of the return powder three-way valve (19) is connected to the top of the drying tower (4), and the second outlet of the return powder three-way valve (19) is connected to the bottom of the drying tower (4).

6. The spray drying apparatus for producing functional sugar alcohols as described in claim 1, characterized in that: A steam branch pipe is connected to the steam pipe (22) at the inlet end of the first valve (23). The steam branch pipe is connected to the inlet end of the hot air heater (16). A second valve (21) is installed on the steam branch pipe.

7. The spray drying apparatus for producing functional sugar alcohols as described in claim 1, characterized in that: The outlet of the secondary cyclone separator (9) is equipped with a nano-scale filter.

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