CN106465833B - Automatic continuous sugar dissolving device and sugar dissolving method - Google Patents
Automatic continuous sugar dissolving device and sugar dissolving method Download PDFInfo
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- CN106465833B CN106465833B CN201510506935.1A CN201510506935A CN106465833B CN 106465833 B CN106465833 B CN 106465833B CN 201510506935 A CN201510506935 A CN 201510506935A CN 106465833 B CN106465833 B CN 106465833B
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Abstract
The invention relates to an automatic continuous sugar dissolving device with low energy consumption and stable sugar degree and a sugar dissolving method. The sugar dissolving device comprises: a sugar supply unit; a sugar dissolving unit that receives sugar supplied from the sugar supplying unit; the solid-liquid separation unit is provided with an inlet and a first outlet which are respectively connected with the sugar dissolving unit, a second outlet which is connected with a first flow path switching part, and a first flow path switching part which is connected with a sugar outlet; and a heating unit, the outlet of the heating unit is connected with the sugar dissolving unit, the inlet is connected with a second flow path switching part, and the second flow path switching part is connected with the process water supply port and the first flow path switching part. The first channel switching section and the second channel switching section are provided to switch between a first channel state in which the second outlet of the solid-liquid separation unit is in communication with the sugar outlet and the process water supply port is in communication with the inlet of the heating unit, and a second channel state in which the second outlet of the solid-liquid separation unit is in communication with the inlet of the heating unit.
Description
Technical Field
The invention relates to an automatic continuous sugar dissolving device and a sugar dissolving method.
Background
Sugar dissolution is an indispensable production link of most beverage production enterprises. Along with the gradual and vigorous market competition, production enterprises always need to continuously improve the production efficiency according to market demands, the energy or raw material consumption in the production process is reduced, and the sugar dissolving device is an energy consumption consumer in the production of beverage enterprises. The traditional sugar dissolving modes are as follows: 1. batch low temperature sugar dissolving: the batch-type low-temperature sugar is a method in which granulated sugar is directly dissolved in water at room temperature and is dissolved by stirring at room temperature. The low-temperature sugar dissolving process can omit the heating and cooling processes, reduce the energy consumption, reduce the production cost and have good taste, but has the defects of long dissolving time, strict sanitary protection measures are required, syrup is not easy to store, and the syrup is required to be produced and used in a short time. 2. Batch type hot-melt sugar: the batch type hot-melt sugar is a method of dissolving granulated sugar in hot water to ensure a certain temperature during the dissolution process. The method is the most widely used dissolution method for beverage enterprises at present. The syrup obtained by dissolving sugar with heat has good quality and high sugar degree. But has the disadvantage that syrup and hot water need to be heated and the energy consumption is very high.
Disclosure of Invention
Technical problem to be solved by the invention
The present invention has been made in view of the above-described problems, and an object thereof is to provide an automatic continuous sugar dissolving device and a sugar dissolving method which are simple in structure, low in energy consumption, good in sugar dissolving effect, stable in sugar degree, and convenient to operate.
Technical means for solving the technical problems
In order to solve the technical problems, the automatic continuous sugar dissolving device of the invention comprises: a sugar supply unit; a sugar dissolving unit that receives sugar supplied from the sugar supplying unit; the solid-liquid separation unit is characterized in that an inlet of the solid-liquid separation unit is connected with the sugar dissolving unit through a primary syrup supply pipe, a first outlet of the solid-liquid separation unit is connected with the sugar dissolving unit through a first return pipe, a second outlet of the solid-liquid separation unit is connected with a first flow path switching part through a syrup supply pipe, and the first flow path switching part is connected with a sugar outlet through a sugar outlet pipe; and a heating unit having an outlet connected to the sugar dissolving unit via a hot water pipe, an inlet connected to a second flow path switching unit connected to a process water supply port and the first flow path switching unit, the first flow path switching unit and the second flow path switching unit being provided to switch between a first flow path state in which the second outlet of the solid-liquid separation unit is in communication with the sugar outlet via the syrup supply pipe, the first flow path switching unit, and the sugar outlet, and a second flow path state in which the process water supply port is in communication with the inlet of the heating unit via the second flow path switching unit, and a second flow path state in which the second outlet of the solid-liquid separation unit is in communication with the inlet of the heating unit via the first flow path switching unit, and the second flow path switching unit.
With the above configuration, in the first channel state, the primary syrup can be continuously separated into the dissolved syrup and the undissolved sugar by the solid-liquid separation unit, and the dissolved syrup is sent out to the sugar outlet via the syrup supply pipe, the first channel switching unit, and the sugar outlet pipe, and the undissolved sugar is returned to the sugar dissolving tank via the first return pipe, so that the process water injected into the sugar dissolving unit is heated to, for example, about 45 to 65 ℃, and it is unnecessary to heat the process water to 80 ℃ for complete dissolution of the granulated sugar, as compared with the conventional intermittent hot-dissolved sugar, and it is unnecessary to provide a stirring rod or a vibration device in the sugar dissolving unit and drive the stirring rod or the vibration device, as compared with the conventional intermittent cold-dissolved sugar, whereby the energy consumption of the entire sugar dissolving device can be reduced.
When the separated dissolved syrup in the solid-liquid separation unit is cooled by, for example, temporarily stopping the sugar dissolving device, the cooled dissolved syrup in the solid-liquid separation unit can be sent to the heating unit for preheating in the second channel state, and thus, the instability of the sugar degree of the output syrup of the sugar dissolving device due to the change of the syrup temperature can be avoided. In addition, the preheating is realized by the heating unit for heating the process water in a normal working state, so that the number of parts can be reduced, and the cost can be reduced.
Further, preferably, the first flow path switching unit is a flow rate adjustment valve, an inlet of the flow rate adjustment valve is connected to a second outlet of the solid-liquid separation unit through the syrup supply pipe, a first outlet of the flow rate adjustment valve is connected to the sugar outlet through the sugar outlet pipe, a second outlet of the flow rate adjustment valve is connected to the sugar dissolving unit through a second return pipe, the process water supply port is connected to an inlet of the heating unit through a process water pipe, and the second flow path switching unit includes: a first valve disposed on the second return line; a second valve disposed on the process water pipe; and a third valve provided on a line connecting an upstream side of the first valve and a downstream side of the second valve, wherein in the first channel state, the second outlet of the solid-liquid separation unit is further in communication with the sugar dissolving unit via the syrup supply pipe, the first channel switching portion, the second channel switching portion, and the second return pipe.
With the above configuration, in the first channel state, a predetermined amount of the dissolved syrup can be sent to the sugar outlet, and the excess dissolved syrup can be returned to the sugar dissolving unit. Thus, syrup can be fed out of the sugar dissolving device at a proper flow rate.
The first flow path switching unit is a flow rate control valve that can simultaneously perform flow path switching and sugar yield control. Therefore, the structure is simple, and the cost is reduced.
In addition, it is preferable that a sugar outlet flow meter is provided in the sugar outlet pipe, and the sugar outlet flow meter is connected to the flow rate adjustment valve in an interlocking manner.
With the above configuration, the opening degree of the first outlet of the flow control valve can be feedback-controlled by using the measurement result of the sugar flow meter provided in the sugar tube, and the sugar yield can be stabilized.
Further, it is preferable that the solid-liquid separation unit includes a plurality of cyclones connected in parallel, bottom outlets of the cyclones are connected to the first return pipe, respectively, to constitute the first outlet of the solid-liquid separation unit, top inlets of the cyclones are connected to the primary syrup supply pipe, respectively, to constitute the inlet of the solid-liquid separation unit, and top outlets of the cyclones are connected to the syrup supply pipe, respectively, to constitute the second outlet of the solid-liquid separation unit.
With the above structure, the primary syrup can be separated into the dissolved syrup and the undissolved sugar, and the quality of the dissolved sugar can be improved.
In addition, it is preferable that a centrifugal pump and a filter are provided on the primary syrup supply pipe, the filter being provided on an upstream side of the centrifugal pump.
This can prevent foreign substances from entering the centrifugal pump to damage the centrifugal pump, and can reduce the load on the downstream solid-liquid separation unit.
Further, it is preferable that the sugar feeding unit includes, in order from an upstream side to a downstream side: the device comprises a sugar pouring hopper, a first discharge valve, a screw conveyor and a second discharge valve; the first discharge valve is arranged below the inverted sugar hopper, the lower end inlet of the screw conveyor is arranged below the first discharge valve, the second discharge valve is arranged below the upper end outlet of the screw conveyor, and the sugar dissolving unit is arranged below the second discharge valve.
By adopting the structure, due to the arrangement of the spiral conveying mechanism, the inverted sugar hopper is not required to be arranged above the sugar dissolving unit, and the inverted sugar hopper is arranged at a lower position, so that the operation of operators is more convenient, and the whole sugar dissolving device can be miniaturized.
In addition, preferably, a frequency converter for changing the conveying speed of the screw conveyor is arranged on the screw conveyor, a sugar degree measuring instrument is arranged on the syrup supply pipe, and the sugar degree measuring instrument is connected with the frequency converter in an interlocking mode.
With the above structure, the frequency converter provided on the screw conveyor can be feedback-controlled by using the measurement result of the sugar degree measuring instrument provided on the syrup supply pipe, and thus the sugar supply speed of the screw conveyor can be changed in real time according to the change of the sugar degree, and the stability of the sugar degree can be maintained.
In addition, it is preferable that the heating unit has a tubular heat exchanger connected to the steam supply port through a steam pipe, a steam adjusting valve is provided on the steam pipe, a hot water temperature sensor, a hot water flowmeter, and a hot water adjusting valve are provided on the hot water pipe, the hot water temperature sensor is connected to the steam adjusting valve in an interlocking manner, and the hot water flowmeter is connected to the hot water adjusting valve in an interlocking manner.
Therefore, the steam regulating valve arranged on the steam pipe can be subjected to feedback control by using the measurement result of the hot water temperature sensor arranged on the hot water pipe, the steam supply quantity can be regulated by using the steam regulating valve in time, the heating temperature of the process water is maintained stable, and the sugar dissolving effect in the sugar dissolving unit is ensured.
Further, the hot water flow valve can be feedback-controlled by the hot water flow meter provided in the hot water pipe, whereby the supply amount of the heated process water can be maintained stable, and further, the stability of the sugar level can be ensured.
The automatic continuous sugar dissolving method provided by the invention comprises a first working state and a second working state by using the automatic continuous sugar dissolving device. In the first operation state, switching the first flow path switching portion and the second flow path switching portion to the first flow path state; injecting sugar from the sugar supply unit into the sugar dissolving unit; supplying process water from the process water supply port to the heating unit via a second flow path switching part; heating the process water in the heating unit; injecting the heated process water into the sugar dissolving unit through the hot water pipe; in the sugar dissolving unit, sugar is dissolved in the heated process water to generate primary syrup; the primary syrup is supplied from the sugar dissolving unit to the solid-liquid separation unit via the primary syrup supply pipe, in which the primary syrup is separated into a dissolved syrup and an undissolved sugar, the dissolved syrup is sent to the sugar outlet via the syrup supply pipe, the first flow path switching section, and the sugar outlet pipe in this order, and the undissolved sugar is returned to the sugar dissolving unit via the first return pipe. In the second operation state, switching the first flow path switching portion and the second flow path switching portion to the second flow path state; supplying the dissolved syrup in the solid-liquid separation unit to the heating unit through the syrup supply pipe, the first flow path switching part, and the second flow path switching part in this order; heating the dissolved syrup in the heating unit; the heated dissolved sugar is returned to the sugar dissolving unit via the hot water pipe.
In the above method, in the first operating state, the primary syrup can be continuously separated into the dissolved syrup and the undissolved sugar by the solid-liquid separation unit, and the dissolved syrup is sent out to the sugar outlet via the syrup supply pipe, the first flow path switching unit, and the sugar outlet pipe, and the undissolved sugar is returned to the sugar dissolving tank, so that the process water injected into the sugar dissolving unit is heated to, for example, about 45 to 65 ℃.
In the second operating state, which is the time when the separated dissolved syrup in the solid-liquid separation unit is cooled due to, for example, the temporary stop of the automatic continuous sugar dissolving device, the cooled dissolved syrup in the solid-liquid separation unit is conveyed to the heating unit to be preheated, so that the instability of the sugar degree at the sugar outlet due to the change of the syrup temperature can be avoided. In addition, the preheating is realized by the heating unit for heating the process water in a normal working state, so that the number of parts can be reduced, and the cost can be reduced.
In the first operating state, it is preferable that a predetermined amount of the dissolved syrup fed from the solid-liquid separation unit is fed to the sugar outlet via the sugar outlet pipe by a flow rate control valve serving as the first flow path switching unit, and the remaining dissolved syrup is fed back to the sugar dissolving unit via a second return pipe.
By adopting the method, in the first working state, the syrup can be sent out from the sugar dissolving device at a proper flow rate.
In the first operating state, it is preferable that the conveying speed of the screw conveyor in the sugar feeding unit is controlled in an interlocking manner based on a measurement result of a sugar degree measuring instrument provided in the syrup feeding pipe.
By adopting the method, the sugar degree of syrup output by the sugar dissolving device can be stabilized.
Drawings
FIG. 1 is a schematic view showing the construction of an automatic continuous sugar dissolving apparatus according to a preferred embodiment of the present invention.
Symbol description:
1. sugar supply unit
11. Sugar pouring hopper
12. First discharge valve
13. Screw conveyor
131. Frequency converter
14. Second discharge valve
15. Operating table
2. Sugar dissolving unit
21. Sugar dissolving tank
22. Injection valve
23. Temperature sensor
24. Process water inlet
3. Solid-liquid separation unit
31. Primary syrup supply pipe
311. 332 centrifugal pump
32. First return pipe
33. Syrup supply pipe
331. Sugar degree measuring instrument
34A-34D cyclone separator
341A-341D cyclone separator
342A-342D cyclone separator inlet
Second outlets of 343A-343D cyclone separators
4. First channel switching part (flow regulating valve)
41. Inlet of flow regulating valve
42. First outlet of flow regulating valve
43. Second outlet of flow regulating valve
5. Sugar outlet pipe
51. Sugar discharge flowmeter
6. Heating unit
61. Hot water pipe
611. Hot water temperature sensor
612. Hot water flowmeter
613. Hot water regulating valve
62. Tube type heat exchanger
63. Steam pipe
631. Steam regulating valve
7. Second channel switching unit
71. First valve
72. Second valve
73. Third valve
8. Second return pipe
9. Art water pipe
Detailed Description
Next, the structure of the automatic continuous sugar dissolving apparatus according to the preferred embodiment of the present invention will be described with reference to fig. 1.
The automatic continuous sugar dissolving device of the invention comprises: a sugar supply unit 1; a sugar dissolving unit 2, the sugar dissolving unit 2 receiving sugar supplied from the sugar supply unit 1; a solid-liquid separation unit 3, wherein an inlet of the solid-liquid separation unit 3 (top inlets 342A to 342D of the cyclone separators 34A to 34D described below) is connected to the sugar dissolving unit 2 through a primary syrup supply pipe 31, a first outlet of the solid-liquid separation unit 3 (bottom outlets 341A to 341D of the cyclone separators 34A to 34D described below) is connected to the sugar dissolving unit 2 through a first return pipe 32, and a second outlet of the solid-liquid separation unit (top outlets 343A to 343D of the cyclone separators 34A to 34D described below) is connected to a first flow path switching unit 4 through a syrup supply pipe 33, and the first flow path switching unit 4 is connected to a sugar outlet through a sugar outlet pipe 5; and a heating unit 6, an outlet of the heating unit 6 is connected with the sugar dissolving unit 2 through a hot water pipe 61, an inlet of the heating unit 6 is connected with a second flow path switching part 7, and the second flow path switching part 7 is connected with a process water supply port and the first flow path switching part 4.
The first channel switching unit 4 and the second channel switching unit 7 are provided to switch between a first channel state and a second channel state: the first channel state is a state in which the second outlet of the solid-liquid separation unit 3 communicates with the sugar outlet via the syrup supply pipe 33, the first channel switching unit 4, and the sugar outlet pipe 5, and the process water supply port communicates with the inlet of the heating unit 6 via the second channel switching unit 7, and the second channel state is a state in which the second outlet of the solid-liquid separation unit 3 communicates with the inlet of the heating unit 6 via the syrup supply pipe 33, the first channel switching unit 4, and the second channel switching unit 7.
Next, the specific structure of the above-described units, components, and the like will be described in more detail.
The sugar feeding unit 1 includes, in order from the upstream side to the downstream side, in the direction of movement of the granulated sugar: a sugar hopper 11, a first discharge valve 12, a screw conveyor 13, and a second discharge valve 14. The first discharge valve 12 is disposed below the inverted sugar hopper 11. The screw conveyor 13 is disposed obliquely upward, the inlet of the lower end thereof is disposed below the first discharge valve 12, the outlet of the upper end thereof is disposed below the second discharge valve 14, and the sugar dissolving tank 21 of the sugar dissolving unit 2 is disposed below the second discharge valve 14. The first discharge valve 12 and the second discharge valve 14 may be used to close or open the sugar supply of the sugar supply unit 1. The screw conveyor 13 is further provided with a frequency converter 131 for changing the conveying speed of the screw conveyor 13, and the sugar feeding speed can be changed. In addition, an operation table 15 is provided at the opening of the pouring hopper 11 for an operator to stand.
The sugar dissolving unit 2 has: a sugar tank 21, an ejector 22 provided on the wall of the sugar tank 21, a temperature sensor 23, a process water inlet 24, and the like. The sugar tank 21 receives granulated sugar supplied from the sugar supply unit 1, and the ejector 22 is connected to the first return pipe 32 for returning undissolved sugar to the sugar tank 21, the temperature sensor 23 for monitoring the temperature in the sugar tank 21, and the process water injection port 24 for injecting process water or syrup heated by the heating unit 6.
The solid-liquid separation unit 3 includes a plurality of (4 in the drawing) cyclone separators 34A to 34D connected in parallel. The bottom outlets 341A to 341D of the cyclones 34A to 34D are connected to the first return pipe 32, respectively, to form a first outlet of the solid-liquid separation unit 3, the top inlets 342A to 342D of the cyclones 34A to 34D are connected to the primary syrup supply pipe 31, respectively, to form an inlet of the solid-liquid separation unit 3, and the top outlets 343A to 343D of the cyclones 34A to 34D are connected to the syrup supply pipe 33, respectively, to form a second outlet of the solid-liquid separation unit 3.
The primary syrup supply pipe 31 is provided with a centrifugal pump 311 for driving the primary syrup produced in the sugar tank 21 to move from the sugar tank 21 to the cyclone separators 34A to 34D, and a filter 312 is provided on the upstream side of the centrifugal pump 311, and the filter 312 can filter out substances having large particles such as impurities from the primary syrup, and serves to protect the centrifugal pump 311 and reduce the burden on the cyclone separators 34A to 34D on the downstream side. A centrifugal pump 332 is provided in the syrup supply pipe 33, and the centrifugal pump 332 is configured to drive the dissolved syrup separated in the cyclone separators 34A to 34D to move from the top outlets 343A to 343D to the first flow switching section 4.
The first flow path switching unit 4 is a flow rate control valve, an inlet 41 of the flow rate control valve 4 is connected to a second outlet of the solid-liquid separation unit 3 through the syrup supply pipe 33, a first outlet 42 of the flow rate control valve 4 is connected to a sugar outlet through the sugar outlet pipe 5, and a second outlet 43 of the flow rate control valve 4 is connected to the sugar tank 21 of the sugar dissolving unit 2 through the second return pipe 8. The process water supply port is connected to an inlet of the heating unit 6 through a process water pipe 9. The second channel switching unit 7 includes: a first valve 71 provided on the second return pipe 8; a second valve 72 provided on the process water pipe 9; and a third valve 73 provided on a line connecting the upstream side of the first valve 71 and the downstream side of the second valve 72. The first valve 71, the second valve 72 and the third valve 73 are interlocked with each other as shown by the broken lines in fig. 1. In the first flow path state, the second outlets of the solid-liquid separation unit 3 (i.e., the top outlets 343A to 343D of the cyclones 34A to 34D) are also in communication with the sugar tank 21 of the sugar solution unit 2 via the syrup supply pipe 33, the flow rate regulating valve 4, the first valve 71 in the second flow path switching section 7, and the second return pipe 8.
The sugar outlet pipe 5 is provided with a sugar outlet flow meter 51, and the sugar outlet flow meter 51 is connected to the flow rate regulating valve 4 in an interlocking manner as indicated by a broken line in fig. 1. The syrup supply pipe 33 is provided with a sugar degree measuring instrument 331, and the sugar degree measuring instrument 331 is connected to the inverter 131 of the screw conveyor 13 in an interlocking manner as indicated by a broken line in fig. 1.
The heating unit 6 has a tubular heat exchanger 62, the tubular heat exchanger 62 is connected to a steam supply port through a steam pipe 63, and a steam regulating valve 631 is provided in the steam pipe 63. A hot water temperature sensor 611, a hot water flow meter 612, and a hot water regulating valve 613 are provided in the hot water pipe 61 connected to the outlet of the pipe heat exchanger 62. The steam regulating valve 631 is interlockingly connected to the hot water temperature sensor 611 as shown by a broken line in fig. 1, and the hot water flow meter 612 is interlockingly connected to the hot water regulating valve 613 as shown by a broken line in fig. 1.
Further, an evacuation valve is provided below the inlet at the lower end of the screw conveyor 13, below the sugar tank 21, and below the cyclones 34A to 34D, respectively, for evacuating the screw conveyor 13, the sugar tank 21, and the cyclones 34A to 34D during cleaning, for example.
An automatic continuous sugar dissolving method using the above-mentioned automatic continuous sugar dissolving apparatus according to the preferred embodiment of the present invention will be described below.
(first operating state)
In a state where the automatic continuous sugar dissolving apparatus is normally operated (first operating state), the following operations are performed.
The first flow path switching part (i.e., the flow rate regulating valve) 4 and the second flow path switching part 7 are switched to the above-described first flow path state, that is, the inlet 41 of the first flow path switching part 4 communicates with the first outlet 42 and the second outlet 43 at the same time, and the opening degrees of the first outlet 42 and the second outlet 43 of the first flow path switching part 4 are feedback-controlled based on the measurement result of the sugar-outlet flowmeter 51 on the sugar tube 5, while the first valve 71 and the second valve 72 in the second flow path switching part 7 are opened, and the third valve 73 is closed.
An operator stands on the operation table 15 of the sugar supply unit 1 to pour granulated sugar into the pouring hopper 11, and the granulated sugar in the pouring hopper 11 is loaded on the screw conveyor 13 through the first discharge valve 12, is further conveyed from the lower end inlet thereof to the upper end opening thereof as the screw conveyor 13 is operated, and is then injected into the sugar dissolving tank 21 located below the second discharge valve 14 through the second discharge valve 14. Meanwhile, the process water is supplied from the process water supply port to the tubular heat exchanger 62 of the heating unit 6 via the second valve 72 and the process water pipe 9 in the second flow path switching part 7, and the steam for heating is supplied to the tubular heat exchanger 62 through the steam pipe 63, so that the process water is heated by the heating unit 6 and then injected into the sugar tank 21 via the hot water pipe 61. During the heating of the process water, the steam adjusting valve 631 provided to the steam pipe 63 is feedback-controlled by using the measurement result of the hot water temperature sensor 611 provided to the hot water pipe 61, whereby the steam supply amount can be adjusted by the steam adjusting valve 631 in time to thereby control the heating temperature of the process water to a desired temperature. Further, the hot water flow meter 612 provided in the hot water pipe 61 performs feedback control on the hot water regulating valve 613, whereby the supply amount of the heated process water can be ensured to be stable. In the sugar tank 21, granulated sugar is dissolved in the heated process water, thereby producing primary syrup.
The primary syrup is supplied to the solid-liquid separation unit 3 via the primary syrup supply pipe 31 by the centrifugal pump 311, and the primary syrup is separated into dissolved syrup moving upward and undissolved sugar precipitating downward by a spiral motion in the solid-liquid separation unit 3, specifically, in the plurality of cyclone separators 32A to 32D. The dissolved syrup is supplied to the inlet 41 of the first flow path switching section (i.e., flow rate adjusting valve) 4 by a centrifugal pump 332 provided in the syrup supply pipe 33, and undissolved sugar is returned to the sugar dissolving tank 21 via the first return pipe 32. In the flow rate control valve 4, a predetermined amount of the dissolved syrup is sent from the first outlet 42 of the flow rate control valve 4 to the sugar outlet via the sugar outlet pipe 5, and the remaining dissolved syrup is sent from the second outlet 43 of the flow rate control valve 4 to the second return pipe 8. At this time, since the first valve 71 in the second flow path switching section 7 is opened and the third valve 73 is closed, the remaining dissolved syrup is returned to the sugar tank 21 via the second return pipe 8.
Accordingly, since the primary syrup is continuously separated into the dissolved syrup and the undissolved sugar by the solid-liquid separation unit 3, the dissolved syrup is fed out to the sugar outlet by a predetermined amount, and the undissolved sugar is fed back to the sugar dissolving tank 21, the temperature in the sugar dissolving tank 21, that is, the process water injected into the sugar dissolving tank 21, is heated to, for example, about 45 to 65 ℃, and it is not necessary to heat the process water to 80 ℃ in order to completely dissolve the granulated sugar, as compared with the conventional intermittent hot-melt sugar, and it is not necessary to provide a stirring rod or a vibration device in the sugar dissolving tank 21 and drive it, whereby the energy consumption of the entire sugar dissolving device can be reduced.
Further, by feedback-controlling the opening degrees of the first outlet 42 and the second outlet 43 of the first channel switching unit (i.e., the flow rate regulating valve) 4 using the measurement result of the sugar discharge flow meter 51 provided in the sugar discharge pipe 5, the sugar discharge amount can be maintained at the predetermined amount, that is, the sugar discharge amount can be stabilized. Further, by feedback-controlling the frequency converter 131 provided in the screw conveyor 13 using the measurement result of the sugar degree measuring instrument 331 provided in the syrup supply pipe 33, the sugar supply speed of the screw conveyor 13 can be changed in real time according to the change in sugar degree, and the sugar degree can be maintained stable.
(second operating state)
When the automatic continuous sugar dissolving apparatus is temporarily stopped to cause the separated dissolved syrup in the solid-liquid separation unit 3 to cool (second operation state), the following operation is performed.
The first channel switching unit (i.e., the flow rate regulating valve) 4 and the second channel switching unit 7 are switched to the second channel state, that is, the opening degree of the first outlet 42 of the first channel switching unit 4 is adjusted to 0, the opening degree of the second outlet 43 is adjusted to be fully opened, the first valve 71 and the second valve 72 in the second channel switching unit 7 are closed, and the third valve 73 is opened.
The cooled dissolved syrup in the solid-liquid separation unit 3 is supplied to the inlet 41 of the first flow path switching section 4 via the syrup supply pipe 33 by a centrifugal pump 332 provided on the syrup supply pipe 33. In the first channel switching section 4, since the opening degree of the first outlet 42 connected to the sugar tube 5 is 0, all of the cooled dissolved syrup flows from the second outlet 43 to the second channel switching section 7. In the second flow path switching part 7, since the first valve 71 and the second valve 72 are closed and the third valve 73 is opened, the cooled dissolved syrup flows into the process water pipe 9 via the third valve 73 and further flows into the pipe heat exchanger 62 of the heating unit 6. The cooled dissolved syrup is heated in a tube heat exchanger 62, and the heated dissolved syrup is returned to the sugar dissolving tank 21 via a hot water tube 61.
The above heating is performed in a state where the automatic continuous sugar dissolving apparatus is temporarily stopped to cool the dissolved syrup in the solid-liquid separation unit 3, because the sugar degree measured by the sugar degree measuring instrument 33 has a great relationship with the temperature of the syrup, and if the temperature of the syrup is changed greatly, the sugar degree measured by the sugar degree measuring instrument 33 becomes inaccurate. Therefore, the cooled dissolved syrup in the solid-liquid separation unit 3 is preheated as described above before restarting the whole sugar dissolving apparatus after the stoppage, whereby the measurement deviation of the sugar degree measuring instrument 33 can be avoided and the sugar degree stability can be ensured.
In addition, the above-mentioned preheating of the cooled dissolved syrup is realized by the heating unit 6 for heating the process water under the normal operation state, so that the number of parts can be reduced and the cost can be reduced.
While the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and omissions may be made without departing from the spirit of the present invention.
In the above embodiment, the second outlet of the flow rate adjustment valve is connected to the sugar tank through the second return pipe so as to return the surplus syrup to the sugar tank in the first flow path state, but the present invention is not limited thereto, and all the syrup may be fed out from the sugar tank in the first flow path state without providing the second return pipe. In this case, a well-known two-position three-way selector valve may be used as the first flow path switching portion.
In the above embodiment, the first flow path switching unit is a flow rate adjustment valve, and the opening degree of the first outlet of the flow rate adjustment valve is adjusted to 0 to switch the first flow path state to the second flow path state, and the opening degrees of the two outlets of the flow rate adjustment valve are also adjusted to adjust the sugar yield in the first flow path state. That is, the flow rate control valve simultaneously performs the functions of flow path switching and sugar yield control. However, the present invention is not limited to this, and the two functions may be realized by different means, that is, a well-known two-position three-way directional valve is used to switch the flow paths, and a second return pipe and a valve are additionally provided on the downstream side of the two-position three-way directional valve, thereby adjusting the sugar yield.
In the above embodiment, the second flow path switching portion is constituted by three valves, but not limited to this, a known two-position four-way selector valve may be used for the second flow path switching portion when the second return pipe is provided, and a known two-position three-way selector valve may be used for the second flow path switching portion when the second return pipe is not provided.
In the above embodiment, four cyclones are used for the solid-liquid separation unit, but the present invention is not limited thereto, and other solid-liquid separation devices such as a filter may be used. In addition, the number of the cyclone separators is not limited to four, and may be appropriately selected according to the sugar yield requirements.
In the above embodiment, the heating unit adopts the tube heat exchanger, and the heat source is steam, but it is not limited thereto, and other heating devices and heat sources may be adopted.
Claims (9)
1. An automatic continuous sugar dissolving device, comprising:
a sugar supply unit;
a sugar dissolving unit that receives sugar supplied from the sugar supplying unit;
the solid-liquid separation unit is characterized in that an inlet of the solid-liquid separation unit is connected with the sugar dissolving unit through a primary syrup supply pipe, a first outlet of the solid-liquid separation unit is connected with the sugar dissolving unit through a first return pipe, a second outlet of the solid-liquid separation unit is connected with a first flow path switching part through a syrup supply pipe, and the first flow path switching part is connected with a sugar outlet through a sugar outlet pipe; and
a heating unit, an outlet of which is connected with the sugar dissolving unit through a hot water pipe, an inlet of which is connected with a second flow path switching part, the second flow path switching part is connected with a process water supply port and the first flow path switching part,
the first and second flow path switching portions are provided to switch between a first flow path state in which the second outlet of the solid-liquid separation unit communicates with the sugar outlet via the syrup supply pipe, the first flow path switching portion, and the sugar outlet pipe, and the process water supply port communicates with the inlet of the heating unit via the second flow path switching portion, and a second flow path state in which the second outlet of the solid-liquid separation unit communicates with the inlet of the heating unit via the first flow path switching portion, and the second flow path switching portion;
the first flow path switching part is a flow regulating valve, an inlet of the flow regulating valve is connected with a second outlet of the solid-liquid separation unit through the syrup supply pipe, a first outlet of the flow regulating valve is connected with the sugar outlet through the sugar outlet pipe, a second outlet of the flow regulating valve is connected with the sugar dissolving unit through a second return pipe,
the process water supply port is connected with the inlet of the heating unit through a process water pipe,
the second flow path switching unit includes:
a first valve disposed on the second return line;
a second valve disposed on the process water pipe; and
a third valve provided on a line connecting an upstream side of the first valve and a downstream side of the second valve,
in the first flow path state, the second outlet of the solid-liquid separation unit is also in communication with the sugar dissolving unit via the syrup supply pipe, the first flow path switching portion, the second flow path switching portion, and the second return pipe;
the solid-liquid separation unit comprises a plurality of cyclone separators which are connected in parallel, wherein the bottom outlets of the cyclone separators are respectively connected with the first return pipe to form the first outlet of the solid-liquid separation unit, the top inlets of the cyclone separators are respectively connected with the primary syrup supply pipe to form the inlet of the solid-liquid separation unit, and the top outlets of the cyclone separators are respectively connected with the syrup supply pipe to form the second outlet of the solid-liquid separation unit.
2. An automatic continuous sugar dissolving device according to claim 1, wherein,
and the sugar outlet pipe is provided with a sugar outlet flowmeter which is connected with the flow regulating valve in an interlocking way.
3. An automatic continuous sugar dissolving device according to claim 1, wherein,
the primary syrup supply pipe is provided with a centrifugal pump and a filter provided on an upstream side of the centrifugal pump.
4. An automatic continuous sugar dissolving device according to claim 1, wherein,
the sugar supply unit comprises, in order from an upstream side to a downstream side: the device comprises a sugar pouring hopper, a first discharge valve, a screw conveyor and a second discharge valve;
the first discharge valve is arranged below the inverted sugar hopper, the lower end inlet of the screw conveyor is arranged below the first discharge valve, the second discharge valve is arranged below the upper end outlet of the screw conveyor, and the sugar dissolving unit is arranged below the second discharge valve.
5. The automatic continuous sugar dissolving device according to claim 4, wherein,
the screw conveyor is provided with a frequency converter for changing the conveying speed of the screw conveyor,
the sugar degree measuring instrument is arranged on the syrup supply pipe and is connected with the frequency converter in an interlocking mode.
6. An automatic continuous sugar dissolving device according to claim 1, wherein,
the heating unit is provided with a tubular heat exchanger which is connected with a steam supply port through a steam pipe, a steam regulating valve is arranged on the steam pipe,
the hot water pipe is provided with a hot water temperature sensor, a hot water flowmeter and a hot water regulating valve, wherein the hot water temperature sensor is connected with the steam regulating valve in an interlocking manner, and the hot water flowmeter is connected with the hot water regulating valve in an interlocking manner.
7. An automatic continuous sugar dissolving method, characterized in that the automatic continuous sugar dissolving device according to any one of claims 1 to 6 is used, the automatic continuous sugar dissolving method comprises a first working state and a second working state,
in the first operating state of the device,
switching the first channel switching portion and the second channel switching portion to the first channel state;
injecting sugar from the sugar supply unit into the sugar dissolving unit;
supplying process water from the process water supply port to the heating unit via a second flow path switching part;
heating the process water in the heating unit;
injecting the heated process water into the sugar dissolving unit through the hot water pipe;
in the sugar dissolving unit, sugar is dissolved in the heated process water to generate primary syrup;
supplying the primary syrup from the sugar dissolving unit to the solid-liquid separation unit via the primary syrup supply pipe;
in the solid-liquid separation unit, the primary syrup is separated into a dissolved syrup and an undissolved sugar, the dissolved syrup is sent to the sugar outlet through the syrup supply pipe, the first flow path switching part and the sugar outlet pipe in this order, the undissolved sugar is sent back to the sugar dissolving unit through the first return pipe,
in the second operating state of the device,
switching the first channel switching portion and the second channel switching portion to the second channel state;
supplying the dissolved syrup in the solid-liquid separation unit to the heating unit through the syrup supply pipe, the first flow path switching part, and the second flow path switching part in this order;
heating the dissolved syrup in the heating unit;
the heated dissolved sugar is returned to the sugar dissolving unit via the hot water pipe.
8. The automatic continuous sugar dissolving method according to claim 7, wherein,
in the first operating state of the device,
the dissolved syrup fed from the solid-liquid separation unit is fed to the sugar outlet via the sugar outlet pipe by a flow rate control valve serving as the first flow path switching unit, and the remaining dissolved syrup is returned to the sugar dissolving unit via a second return pipe.
9. The automatic continuous sugar dissolving method according to claim 8, wherein,
and carrying out interlocking control on the conveying speed of the screw conveyor in the sugar supply unit according to the measuring result of the sugar degree measuring instrument arranged on the syrup supply pipe.
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| CN201510506935.1A CN106465833B (en) | 2015-08-18 | 2015-08-18 | Automatic continuous sugar dissolving device and sugar dissolving method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102671556B (en) * | 2012-04-19 | 2014-03-12 | 杭州松源机械制造有限公司 | Full automatic continuous sugar dissolving system and preparation method thereof |
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| CN102671556B (en) * | 2012-04-19 | 2014-03-12 | 杭州松源机械制造有限公司 | Full automatic continuous sugar dissolving system and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 施建强.连续式溶糖系统在饮料生产线中的应用.《中国新技术新产品》.2012,(第4期),第19页. * |
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