Curing and drying equipment for refined sugar

Abstract

The utility model discloses curing and drying equipment for refined sugar, which comprises a primary drying mechanism, a full drying mechanism and a screening and packaging mechanism, the primary drying mechanism, the full drying mechanism and the screening and packaging mechanism are sequentially connected through an elevator, and the primary drying mechanism comprises a screw conveyor, a roller dryer and a fluidized bed dryer. The screw conveyor is connected with a feeding port of the roller dryer, a discharging port of the roller dryer is connected with a feeding port of the fluidized bed dryer, the sufficient drying mechanism comprises an aging bin and an air processor, an air pipe set is arranged at the position, close to the bottom, in the aging bin, and the air processor is connected with the air pipe set. The screening and packaging mechanism comprises a buffering sugar hopper, a classifying screen and a conveying belt. The pre-drying effect is improved, the aging bin is low in manufacturing cost, the effect is practical and easy to use, and equipment is installed according to local conditions and is convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of sugarcane sugar processing, in particular to a ripening and drying device for refined sugar. Background Technique

[0002] The essence of the white granulated sugar drying process is to transfer moisture from the sugar to the air. There are three types of moisture in white granulated sugar: free water, bound water, and intracrystalline water. Among them, free water is surface moisture, and this part of water is easily removed by drying. While bound water and intracrystalline water are internal moisture, which is wrapped inside the crystals, and this part of moisture cannot be removed by general drying methods; due to the action of humidity difference and temperature difference, the moisture in the sugar slowly precipitates during storage, forming a liquid film on the crystal surface, and after close contact, adhesion occurs, forming lumps. White granulated sugar, especially refined sugar, is prone to caking during storage.

[0003] At present, most domestic sugar-making enterprises use ripening bins as drying equipment for refined sugar, which can greatly slow down the caking phenomenon of sugar. Moreover, it is equipped with a full-automatic constant-temperature drying technology, an automatic air conditioning and filtering system for ripening, and an air extraction and dust removal system for the ripening bin, which can stabilize and improve the quality and performance of refined sugar, reduce the caking phenomenon, and has a long shelf life, and is more suitable for the production of refined sugar. However, this ripening bin also has certain disadvantages. This equipment not only has a very high manufacturing cost, but also occupies a large area, and many production facilities need to be modified for the equipment. The operation and implementation process is complex, and the additional cost is huge, which is not suitable for many small and medium-sized domestic sugar-making enterprises. Content of the Utility Model

[0004] Based on this, the purpose of the present utility model is to provide a ripening and drying device for refined sugar to solve the technical problems raised in the above background.

[0005] To achieve the above purpose, the present utility model provides the following technical solution: A ripening and drying device for refined sugar, including a preliminary drying mechanism, a full drying mechanism, and a screening and packaging mechanism. The preliminary drying mechanism, the full drying mechanism, and the screening and packaging mechanism are sequentially connected by a hoist. The preliminary drying mechanism includes a screw conveyor, a drum dryer, and a fluidized bed dryer. The screw conveyor is connected to the feed inlet of the drum dryer. The discharge outlet of the drum dryer is connected to the feed inlet of the fluidized bed dryer. The discharge outlet of the drum dryer is connected to the feed inlet of the first hoist. The full drying mechanism includes an aging bin and an air processor. An air duct group is arranged near the bottom inside the aging bin. The air processor is connected to the air duct group. The screening and packaging mechanism includes a buffer sugar hopper, a classification sieve, and a conveyor belt.

[0006] Further, the preliminary drying mechanism further includes a first cyclone separator, a first induced draft fan, a superconducting dehumidifier, a first blower, a second blower, and a hot air heater. The first blower is connected to the drum dryer through an air inlet pipe, and a hot air heater is provided on the air inlet pipe. The first induced draft fan is connected to both the drum dryer and the fluidized bed dryer through an air draft pipe, and a first cyclone separator is provided on the air draft pipe. The superconducting dehumidifier is connected to the fluidized bed dryer through an air inlet pipe, and a second blower is provided on the air inlet pipe.

[0007] Preferably, magnetic separators are provided at both the inlet and outlet of the fluidized bed dryer.

[0008] Further, a feed pipe is provided at the top of the aging bin, and a discharge pipe is provided at the bottom. The feed pipe is connected to the outlet of the first elevator, and the discharge pipe is connected to the inlet of the second elevator.

[0009] Preferably, a pneumatic balancer, an air intake port, a level gauge interface, and a plurality of stainless steel observation hole sight glass seats are further provided at the top of the aging bin, and a maintenance hole is further provided on the side of the aging bin.

[0010] Preferably, the pneumatic balancer includes a counterweight, a pull rod, and a pressing plate. The counterweight is installed at one end of the pull rod, and the other end is hinged to the pressing plate. A sealing gasket is further provided on the pressing plate.

[0011] Preferably, a second induced draft fan and a second cyclone separator are further included. The second induced draft fan is connected to the air intake port through an air draft pipe, and the second cyclone separator is installed on the air draft pipe connecting the second induced draft fan and the air intake port.

[0012] Further, the air duct group includes an air inlet main pipe and a plurality of air outlet branch pipes connected to the air inlet main pipe. Valves are provided at the connection points of the plurality of air outlet branch pipes and the air inlet main pipe, and a plurality of air outlet ports are provided below the air outlet branch pipes. Baffles are welded on both sides along the length direction of the air outlet branch pipes at the air outlet ports.

[0013] Preferably, the air inlet end of the air inlet main pipe is connected to an air processor through an air inlet pipe, and a third blower is provided on the air inlet pipe.

[0014] Further, the buffer sugar hopper is connected to the outlet of the second elevator, the sorting sieve is located below the buffer sugar hopper, and the conveyor belt is located below the sorting sieve.

[0015] The utility model dries the surface moisture of refined sugar through the preliminary drying mechanism, which not only improves the pre-drying effect, but also makes the aging bin used for ripening and drying have low manufacturing cost, small floor area, good ripening and drying effect and practicability. The equipment installation is adapted to local conditions and is convenient for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1Schematic structural diagram of the present utility model;

[0017] Figure 2 Schematic structural diagram of the aging bin of the present utility model;

[0018] Figure 3 Schematic three-dimensional structural diagram of the air duct group of the present utility model;

[0019] Figure 4 Top view structural diagram of the air duct group of the present utility model;

[0020] Figure 5 Side view structural diagram of the air duct group of the present utility model;

[0021] Figure 6 For Figure 2 Enlarged structural diagram at position B in

[0022] Figure 7 For Figure 2 Enlarged structural diagram at position A in

[0023] Figure 8 Schematic structural diagram of the air pressure balancer of the present utility model. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0025] Next, the embodiments of the present utility model will be described according to the overall structure of the present utility model.

[0026] As Figures 1-8 shown, the present utility model includes a preliminary drying mechanism, a sufficient drying mechanism, and a screening and packaging mechanism. The preliminary drying mechanism, the sufficient drying mechanism, and the screening and packaging mechanism are sequentially connected by a hoist. The preliminary drying mechanism includes a screw conveyor 1, a drum dryer 2, and a fluidized bed dryer 3. The screw conveyor 1 is connected to the feed inlet of the drum dryer 2. The discharge outlet of the drum dryer 2 is connected to the feed inlet of the fluidized bed dryer 3. The discharge outlet of the drum dryer 2 is connected to the feed inlet of the first hoist 15. The sufficient drying mechanism includes an aging bin 4 and an air processor 13. An air duct group 5 is provided near the bottom inside the aging bin 4. The air processor 13 is connected to the air duct group 5. The screening and packaging mechanism includes a buffer sugar hopper 19, a classification sieve 20, and a conveyor belt 2.

[0027] The preliminary drying mechanism of the present utility model further includes a first cyclone separator 7, a first induced draft fan 6, a superconducting dehumidifier 8, a first blower 11, a second blower 10 and a hot air heater 12. The first blower 11 is connected to the drum dryer 2 through an air inlet pipe, and the hot air heater 12 is provided on the air inlet pipe. The first induced draft fan 6 is connected to both the drum dryer 2 and the fluidized bed dryer 3 through an air draft pipe, and the first cyclone separator 7 is provided on the air draft pipe. The superconducting dehumidifier 8 is connected to the fluidized bed dryer 3 through an air inlet pipe, and the second blower 10 is provided on the air inlet pipe. Magnetic separators 9 are provided at both the feed inlet and the discharge outlet of the fluidized bed dryer 3.

[0028] A feed pipe 41 is provided at the top of the aging bin 4, and a discharge pipe 42 is provided at the bottom thereof. The feed pipe 41 is connected to the discharge outlet of the first elevator 15, and the discharge pipe 42 is connected to the feed inlet of the second elevator 16. A pneumatic balancer, an air intake port 43, a level gauge interface 44 and a plurality of stainless steel observation hole sight glass seats 45 are further provided at the top of the aging bin 4. An inspection hole 46 is further provided on the side of the aging bin 4. The pneumatic balancer includes a counterweight 22, a pull rod 23 and a pressing plate 24. The counterweight 22 is installed at one end of the pull rod 23, and the other end is hinged to the pressing plate 24. A sealing gasket 25 is further provided on the pressing plate 24. The level gauge interface 44 is used to install a radar level gauge to monitor the material level in the aging bin. The stainless steel observation hole sight glass seat 45 is used to observe the aging condition of the material in the bin. When the aging bin 4 is in normal operation, the air pressure in the bin is in a negative pressure state. The pneumatic balance device is closed by the action of the counterweight 22 on the pressing plate 24 to keep the negative pressure stable in the bin. When the negative pressure in the bin is too large, the counterweight 22 is pulled up and the pressing plate 24 is opened to break the vacuum until the pressing plate 24 falls back again to the rated negative pressure, and finally the effect of maintaining the negative pressure stability is achieved.

[0029] The sufficient drying mechanism of the present utility model further includes a second induced draft fan 18 and a second cyclone separator 17. The second induced draft fan 18 is connected to the air intake port 43 through an air draft pipe, and the second cyclone separator 17 is installed on the air draft pipe connecting the second induced draft fan 18 and the air intake port 43.

[0030] The air duct group 5 of the present utility model is two-layer and installed at a position close to the bottom inside the aging bin 4, as Figures 3-5 shown. It includes an air inlet main pipe 51 and a plurality of air outlet branch pipes 52 connected to the air inlet main pipe 51. Valves 53 are provided at the connection positions of the plurality of air outlet branch pipes 52 and the air inlet main pipe 51. The valves 53 are installed outside the aging bin 4 to facilitate the adjustment of the air volume. A plurality of air outlets (not shown in the figure) are provided below the air outlet branch pipes 52. Baffles are welded on both sides along the length direction of the air outlet branch pipes. The baffles can prevent powdered sugar from entering the air outlets and blocking the air outlets. The air inlet end of the air inlet main pipe 51 is connected to the air processor 13 through an air inlet pipe, and the third blower 14 is provided on the air inlet pipe.

[0031] The working principle of the present utility model:

[0032] Refined sugar is fed into the drum dryer 2 through the screw conveyor 1 for hot air drying. The hot air is ordinary air blown in by the blower 11 and heated to 50 - 55 °C by the hot air heater 12 before entering the drum dryer 2. After drying, the refined sugar passes through the iron remover 9 and then enters the fluidized bed dryer 3. Ordinary air is dehumidified by the superconducting dehumidifier 8 and then blown into the fluidized bed dryer 3 by the blower 10. After being dehumidified by the superconducting dehumidifier 8, the incoming air of the fluidized bed dryer 3 is about 23 °C and the relative humidity is 60% RH. The water vapor and sugar powder generated in the drum dryer 2 and the fluidized bed dryer 3 are led out by the first induced draft fan 6 and processed in the first cyclone separator 7. The refined sugar comes out of the fluidized bed dryer 3 at a temperature of 38 - 40 °C, and the total moisture content of the refined sugar is 0.08% - 0.12%. The refined sugar enters the feed inlet of the first elevator 15 from the discharge port of the fluidized dryer 3 through the iron remover 9, and is then transported to the aging bin 4 by the first elevator 15. The refined sugar comes out of the fluidized bed dryer 8 at a temperature of 38 - 40 °C, and the total moisture content of the refined sugar is 0.08% - 0.12%. Ordinary air is dried and dehumidified by the air processor 13 to a temperature of 35 °C and a relative humidity of 22% RH, and is then blown into the aging bin 4 by the third blower 14. The dry air contacts the refined sugar in the aging bin 4 in a countercurrent manner, taking away the internal moisture slowly released by the refined sugar to achieve the purpose of fully drying the refined sugar. The water vapor and sugar powder generated in the aging bin 4 are led out through the air inlet 43 by the second induced draft fan 18 and processed by the second cyclone separator 17. After aging treatment, the total moisture content of the refined sugar is controlled within 0.04% - 0.05%. The refined sugar after aging and drying is lifted to the buffer sugar hopper 19 by the second elevator 16, then falls into the sorting sieve 20 below, and finally is transported to the packaging process for packaging through the conveyor belt 2. After being packaged and stored for more than 79 days, the caking phenomenon is basically eliminated.

[0033] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and not limitations thereto. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations that do not contribute creatively to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A ripening and drying device for refined sugar, characterized in that, It includes a preliminary drying mechanism, a sufficient drying mechanism and a screening and packaging mechanism. The preliminary drying mechanism, the sufficient drying mechanism and the screening and packaging mechanism are sequentially connected by a hoist. The preliminary drying mechanism includes a screw conveyor, a drum dryer and a fluidized bed dryer. The screw conveyor is connected to the feed inlet of the drum dryer. The discharge outlet of the drum dryer is connected to the feed inlet of the fluidized bed dryer. The discharge outlet of the drum dryer is connected to the feed inlet of the first hoist. The sufficient drying mechanism includes an aging bin and an air processor. An air duct group is arranged near the bottom inside the aging bin. The air processor is connected to the air duct group. The screening and packaging mechanism includes a buffer sugar hopper, a classification sieve and a conveyor belt.

2. The aging and drying equipment for refined sugar according to claim 1, characterized in that: The preliminary drying mechanism further includes a first cyclone separator, a first induced draft fan, a superconducting dehumidifier, a first blower, a second blower and a hot air heater. The first blower is connected to the drum dryer through an air inlet pipe, and a hot air heater is arranged on the air inlet pipe. The first induced draft fan is connected to both the drum dryer and the fluidized bed dryer through an air draft pipe. A first cyclone separator is arranged on the air draft pipe. The superconducting dehumidifier is connected to the fluidized bed dryer through an air inlet pipe, and a second blower is arranged on the air inlet pipe.

3. The aging and drying equipment for refined sugar according to claim 2, characterized in that: Magnetic separators are arranged at both the feed inlet and the discharge outlet of the fluidized bed dryer.

4. A ripening and drying device for refined sugar according to claim 1, characterized in that: The top of the aging bin is provided with a feed pipe, and the bottom is provided with a discharge pipe. The feed pipe is connected to the discharge outlet of the first hoist, and the discharge pipe is connected to the feed inlet of the second hoist.

5. The aging and drying equipment for refined sugar according to claim 4, wherein: The top of the aging bin is further provided with a pressure balancer, an air intake port, a level gauge interface and a plurality of stainless steel observation hole sight glass seats. A maintenance hole is arranged on the side of the aging bin.

6. The aging and drying equipment for refined sugar according to claim 5, wherein: The pressure balancer includes a counterweight, a pull rod and a pressing plate. The counterweight is installed at one end of the pull rod, and the other end is hinged to the pressing plate. A sealing gasket is further arranged on the pressing plate.

7. The aging and drying equipment for refined sugar according to claim 4, wherein: It further includes a second induced draft fan and a second cyclone separator. The second induced draft fan is connected to the air intake port through an air draft pipe. The second cyclone separator is installed on the air draft pipe connecting the second induced draft fan and the air intake port.

8. A ripening and drying device for refined sugar according to claim 1, characterized in that: The air duct group includes an air inlet main pipe and a plurality of air outlet branch pipes connected to the air inlet main pipe. Valves are arranged at the connections of the plurality of air outlet branch pipes and the air inlet main pipe. A plurality of air outlet openings are arranged below the air outlet branch pipes, and baffles are welded on both sides along the length direction of the air outlet branch pipes at the air outlet openings.

9. A ripening and drying device for refined sugar according to claim 8, characterized in that: The air inlet end of the air inlet main pipe is connected to the air processor through an air inlet pipe, and a third blower is arranged on the air inlet pipe.

10. A ripening and drying device for refined sugar according to claim 1, characterized in that: The buffer sugar hopper is connected to the discharge outlet of the second hoist. The classification sieve is located below the buffer sugar hopper, and the conveyor belt is located below the classification sieve.

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