A screening waste sugar recovery system

Abstract

The utility model relates to a screening waste sugar recovery system, including a swing screen, a sugar dissolving tank, a centrifugal pump, a plate heat exchanger, a gas-liquid separator and an induced draft fan. The dissolving tank is connected to the gas-liquid separator through an induced draft pipe, a spray device is arranged on the induced draft pipe, the centrifugal pump is arranged on the pipeline connecting the sugar dissolving tank and the plate heat exchanger, a dissolving water pipe, a liquid level meter, a pressure sensor and a water supply valve are arranged on the dissolving tank respectively, the control signal between the liquid level meter and the water supply valve is interlocked, a density meter is arranged on the liquid discharge pipe, a liquid outlet valve is arranged on the sugar liquid discharge pipe, the control signal between the density meter and the liquid outlet valve is interlocked, a thermometer is arranged on the spray pipe, a steam regulating valve is arranged on the heat medium feed pipe, the control signal between the thermometer and the steam regulating valve is interlocked, and a fourth control signal line interconnected with the pressure sensor and the induced draft fan is arranged. The utility model realizes the automatic dissolution and recovery of screening waste sugar, saves labor costs, and realizes efficient and continuous production.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder screening and recovery, and particularly relates to a screening waste sugar recovery system. Background Art

[0002] The screening machine makes the material vibrate or slide on the screen surface, so that the material smaller than the screen aperture can be screened out through the screen surface, while the larger material is left on the screen surface and then collected. The screening machine can complete the classification of products of different particle sizes by matching screens of different specifications. After the sugar products are screened, the screened waste sugar that does not meet the specification requirements is often collected in ton bags and then dissolved.

[0003] At present, the main method of recycling waste sugar by screening in China is to collect waste sugar into ton bags through pipelines, and then transfer it manually to dissolve. This method has many disadvantages: 1. It requires manual transfer, which is cumbersome to operate; 2. It is easy to cause dust and powder leakage when connecting to ton bags; 3. Dust overflows when switching ton bags, polluting the on-site environment. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a screening waste sugar recovery system, which can achieve continuous and automatic recovery of screening waste sugar and continuous dissolution, and is very suitable for large-scale industrial production.

[0005] The utility model is implemented in this way, providing a screening waste sugar recovery system, comprising a swing screen, a sugar dissolving tank, a centrifugal pump, a plate heat exchanger, a gas-liquid separator and an induced draft fan, the swing screen is provided with a sugar head discharge port, the sugar head discharge port is connected with the feed port of the dissolving tank through a feed pipe, the waste sugar screened by the swing screen falls into the dissolving tank along the feed pipe to be dissolved, an induced draft pipe is provided on the top of the dissolving tank to be connected with the feed end of the gas-liquid separator, a spray device is provided on the induced draft pipe, the spray device sprays the gas flowing through the induced draft pipe to absorb the sugar powder particles in the dissolved gas, the sugar liquid obtained after spraying is downwardly collected into the dissolving tank along the induced draft pipe, the air outlet of the gas-liquid separator is connected with the air inlet end of the induced draft fan through the air outlet pipe, the liquid collecting port of the gas-liquid separator is connected with the liquid return port of the dissolving tank through the liquid return pipe, an exhaust pipe is provided at the air outlet end of the induced draft fan, a liquid outlet is also provided on the dissolving tank, and a liquid outlet is connected to the plate heat exchanger. A liquid outlet pipe is arranged between the refrigerant liquid inlets, a centrifugal pump is arranged on the liquid outlet pipe, a discharge pipe is arranged at the refrigerant liquid outlet of the plate heat exchanger, the discharge pipe is respectively connected with the spray pipe and the sugar solution discharge pipe, the spray pipe is connected with the liquid inlet end of the spray device, and the heat medium feed pipe and the heat medium discharge pipe are also respectively connected on the plate heat exchanger; a dissolving water pipe, a liquid level gauge and a pressure sensor are also respectively arranged on the dissolving tank, a water replenishment valve is arranged on the dissolving water pipe, a first control signal line that is interconnected is arranged between the liquid level gauge and the water replenishment valve, a density meter is arranged on the liquid outlet pipe, a liquid outlet valve is arranged on the sugar solution discharge pipe, a second control signal line that is interconnected is arranged between the density meter and the liquid outlet valve, a thermometer is arranged on the spray pipe, a steam regulating valve is arranged on the heat medium feed pipe, a third control signal line that is interconnected is arranged between the thermometer and the steam regulating valve, and a fourth control signal line that is interconnected is arranged between the pressure sensor and the induced draft fan.

[0006] Furthermore, the spraying device includes an upper spray head and a lower spray head, which are respectively arranged in the draft duct, and the upper spray head and the lower spray head respectively spray the gas flowing through the draft duct to absorb the powdered sugar particles in the gas.

[0007] Furthermore, the oscillating screen is also provided with a sugar powder outlet, and the sugar powder outlet is connected to the feeding end of the packaging machine.

[0008] Furthermore, the height of the swing screen is higher than the sugar dissolving tank, the horizontal angle of the feed pipe is greater than 60°, and the waste sugar screened out by the swing screen falls into the dissolving tank along the feed pipe by its own weight.

[0009] Furthermore, the diameter of the air duct is DN200-DN400.

[0010] Compared with the prior art, the waste sugar recovery system of the utility model comprises a swing screen, a sugar dissolving tank, a centrifugal pump, a plate heat exchanger, a gas-liquid separator and an induced draft fan. The waste sugar screened out by the swing screen falls into the dissolving tank along a feed pipe to be dissolved. An induced draft pipe is arranged on the top of the dissolving tank to be connected with the feed end of the gas-liquid separator. A spray device is arranged on the induced draft pipe. The spray device sprays the gas flowing through the induced draft pipe to absorb the sugar powder particles in the dissolved gas. The sugar liquid obtained after spraying is collected downward along the induced draft pipe into the dissolving tank. The centrifugal pump is arranged on the pipeline connecting the sugar dissolving tank and the plate heat exchanger. The dissolving tank is also provided with a dissolving water pipe, a liquid level meter and a pressure sensor, a water supply valve is provided on the dissolving water pipe, a first control signal line interconnected with the liquid level meter and the water supply valve is provided, a density meter is provided on the discharge pipe, a liquid outlet valve is provided on the sugar solution discharge pipe, a second control signal line interconnected with the density meter and the liquid outlet valve is provided, a thermometer is provided on the spray pipe, a steam regulating valve is provided on the heat medium feed pipe, a third control signal line interconnected with the thermometer and the steam regulating valve is provided, and a fourth control signal line interconnected with the pressure sensor and the induced draft fan is provided. The utility model only needs to set up the system interlocking to realize the automatic dissolution and recovery of the screened waste sugar. The system solves the problem of powder leakage on site, saves labor costs, operates stably, and can realize efficient and continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure is a schematic diagram of the structural principle of a preferred embodiment of the waste sugar recovery system for screening of the utility model. DETAILED DESCRIPTION

[0012] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0013] Please refer to Figure 1 As shown, a preferred embodiment of the waste sugar recovery system of the utility model comprises a swing screen 1, a sugar dissolving tank 2, a centrifugal pump 3, a plate heat exchanger 4, a gas-liquid separator 5 and an induced draft fan 6. The arrowed line in the figure indicates the flow direction of the material in the system.

[0014] The oscillating screen 1 is provided with a sugar head discharge port 101 and a sugar powder discharge port 102, respectively. The sugar head discharge port 101 is connected to the feed port 201 of the dissolving tank 2 through the feed pipe 7, and the sugar powder discharge port 102 is connected to the feed end of the packaging machine (not shown in the figure). The waste sugar on the sieve screened out by the oscillating screen 1 falls into the dissolving tank 2 along the feed pipe 7 and is dissolved, and the sugar powder on the sieve screened out by the oscillating screen 1 enters the packaging machine through the sugar powder discharge port 102 for packaging. The sieved waste sugar of this system refers to the sieved waste sugar on the sieve, including any one of the sugar alcohol waste sugars such as xylitol and maltitol.

[0015] An induced draft pipe 8 is provided at the top of the dissolving tank 2 to communicate with the feed end 51 of the gas-liquid separator 5, and a spraying device 9 is provided on the induced draft pipe 8. The spraying device 9 sprays the gas flowing through the induced draft pipe 8 to absorb the sugar powder particles in the dissolved gas. The sugar liquid obtained after spraying is collected downward along the induced draft pipe 8 into the dissolving tank 2. The gas after spraying enters the gas-liquid separator 5 for gas-liquid separation to remove liquid water. The air outlet 52 of the gas-liquid separator 5 is connected to the air inlet end of the induced draft fan 6 through the air outlet pipe 10, and the liquid collecting port 53 of the gas-liquid separator 5 is connected to the liquid return port 202 of the dissolving tank 2 through the liquid return pipe 11. An exhaust pipe 12 is provided at the air outlet end of the induced draft fan 6, and the gas separated by the gas-liquid separator 5 is discharged through the exhaust pipe 12 of the induced draft fan 6.

[0016] A liquid outlet 203 is also provided on the dissolving tank 2, a liquid outlet pipe 13 is provided between the liquid outlet 203 and the refrigerant liquid inlet 41 of the plate heat exchanger 4, a centrifugal pump 3 is provided on the liquid outlet pipe 13, and a liquid discharge pipe 14 is provided at the refrigerant liquid outlet 42 of the plate heat exchanger 4. The liquid discharge pipe 14 is respectively connected to the spray pipe 15 and the sugar solution discharge pipe 16, and the spray pipe 15 is connected to the liquid inlet end of the spray device 9. The heat medium feed pipe 24 and the heat medium discharge pipe 25 are also respectively connected to the plate heat exchanger 4.

[0017] The dissolving tank 2 is also provided with a dissolving water pipe 17, a liquid level meter 18 and a pressure sensor 19, a water supply valve 20 is provided on the dissolving water pipe 17, a first control signal line A interconnected with the liquid level meter 18 and the water supply valve 20 is provided, and the liquid level meter 18 and the water supply valve 20 are interlocked with each other to control the height of the liquid level in the dissolving tank 2. When the liquid level is lower than 10%, the water supply valve 20 is automatically opened to supply water, and when the liquid level rises to 70%, the water supply valve 20 is closed.

[0018] A density meter 21 is provided on the liquid discharge pipe 14, a liquid outlet valve 22 is provided on the sugar liquid discharge pipe 16, and a second control signal line B is provided between the density meter 21 and the liquid outlet valve 22. The density meter 21 and the liquid discharge valve 22 are interlocked to control the density of the sugar liquid in the sugar liquid discharge pipe 16. When the density of the sugar liquid in the liquid discharge pipe 14 is greater than 1.08-~1.20g / cm 3 When the density drops to 1.0-~1.05g / cm3 When , the liquid outlet valve 22 is closed.

[0019] A thermometer 23 is provided on the spray pipe 15, a steam regulating valve 26 is provided on the heat medium feeding pipe 24, a third control signal line C is provided between the thermometer 23 and the steam regulating valve 26, the thermometer 23 and the steam regulating valve 26 are interlocked with each other, and the purpose of controlling the discharge temperature of the sugar liquid in the sugar liquid discharge pipe 16 is achieved by controlling the spray temperature of the spray liquid of the spray device 9. The discharge temperature of the sugar liquid is controlled between 70 and 80°C.

[0020] A fourth control signal line (not shown) is provided between the pressure sensor 19 and the induced draft fan 6. The pressure sensor 19 and the induced draft fan 6 are interlocked to control the gas pressure in the dissolving tank 2. The pressure in the dissolving tank is controlled to be -100 to -10 Pa.

[0021] The spray device 9 includes an upper spray head 91 and a lower spray head 92, which are respectively arranged in the air duct 8. The upper spray head 91 and the lower spray head 92 respectively spray the gas flowing through the air duct 8 to absorb the sugar powder particles in the gas.

[0022] The height of the oscillating screen 1 is higher than the sugar dissolving tank 2, and the horizontal angle of the feed pipe 7 is greater than 60°. The waste sugar screened by the oscillating screen 1 falls into the dissolving tank 2 along the feed pipe 7 by its own weight, ensuring that the screened waste sugar will not be blocked in the feed pipe 7.

[0023] The diameter of the air duct 8 is DN200-DN400.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste sugar recovery system comprising a swing screen, a sugar dissolving tank, a centrifugal pump, a plate heat exchanger, a gas-liquid separator and an induced draft fan, characterized in that: The swing screen is provided with a sugar head discharge port, which is connected with the feed port of the dissolving tank through a discharge pipe, and the waste sugar screened out by the swing screen falls into the dissolving tank along the discharge pipe to be dissolved, an induced draft pipe is provided on the top of the dissolving tank to be connected with the feed end of the gas-liquid separator, a spray device is provided on the induced draft pipe, and the spray device sprays the gas flowing through the induced draft pipe to absorb the sugar powder particles in the dissolved gas, and the sugar liquid obtained after spraying is collected downward along the induced draft pipe into the dissolving tank, the air outlet of the gas-liquid separator is connected with the air inlet end of the induced draft fan through the air outlet pipe, the liquid collecting port of the gas-liquid separator is connected with the liquid return port of the dissolving tank through the liquid return pipe, an exhaust pipe is provided at the air outlet end of the induced draft fan, a liquid outlet is also provided on the dissolving tank, a liquid outlet pipe is provided between the liquid outlet and the refrigerant inlet of the plate heat exchanger, a centrifugal pump is provided on the liquid outlet pipe, and a centrifugal pump is provided on the plate heat exchanger. A discharge pipe is arranged at the refrigerant outlet of the heat exchanger, and the discharge pipe is respectively connected with the spray pipe and the sugar solution discharge pipe, the spray pipe is connected with the liquid inlet end of the spray device, and the heat medium feed pipe and the heat medium discharge pipe are also respectively connected on the plate heat exchanger; a dissolving water pipe, a liquid level gauge and a pressure sensor are also arranged on the dissolving tank, a water replenishment valve is arranged on the dissolving water pipe, a first control signal line that is interconnected is arranged between the liquid level gauge and the water replenishment valve, a density meter is arranged on the discharge pipe, a liquid outlet valve is arranged on the sugar solution discharge pipe, a second control signal line that is interconnected is arranged between the density meter and the liquid outlet valve, a thermometer is arranged on the spray pipe, a steam regulating valve is arranged on the heat medium feed pipe, a third control signal line that is interconnected is arranged between the thermometer and the steam regulating valve, and a fourth control signal line that is interconnected is arranged between the pressure sensor and the induced draft fan.

2. The screening waste sugar recovery system according to claim 1, characterized in that: The spraying device comprises an upper spraying head and a lower spraying head, which are respectively arranged in the induced draft duct, and the upper spraying head and the lower spraying head respectively spray the gas flowing through the induced draft duct to absorb the sugar powder particles in the gas.

3. The waste sugar recovery system according to claim 1, characterized in that: The oscillating screen is also provided with a sugar powder outlet, and the sugar powder outlet is communicated with the feeding end of the packaging machine.

4. The screening waste sugar recovery system according to claim 1, characterized in that: The height of the swing screen is higher than the sugar dissolving tank, the horizontal angle of the feed pipe is greater than 60°, and the waste sugar screened out by the swing screen falls into the dissolving tank along the feed pipe by its own weight to be dissolved.

5. The screening waste sugar recovery system according to claim 1, characterized in that: The diameter of the air duct is DN200-DN400.

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