Cooling system of granulator

Abstract

The utility model provides a cooling system of a granulator, which is used for cooling a screw rod and comprises a cooling flow channel, a circulating soft water pipeline, a circulating freezing water pipeline and a heat exchange unit, the cooling runner is arranged in the screw rod and is provided with a water inlet and a water outlet; the circulating soft water pipeline is connected with the water inlet and the water outlet, and a soft water cooling medium is introduced into the circulating soft water pipeline; a chilled water cooling medium is introduced into the circulating chilled water pipeline; the heat exchange unit is connected with the circulating soft water pipeline and the circulating chilled water pipeline so that heat exchange can be conducted between the soft water cooling medium and the chilled water cooling medium, soft water is used for conducting circulating cooling on the screw, scaling in the pipeline is avoided, and the problem that the pipeline is blocked due to the fact that the chilled water cooling medium scales in the pipeline is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of granulator cooling equipment, and more particularly to a granulator cooling system. Background Art

[0002] In a pelletizer, a screw is generally required to transport the material, and the material moves as the screw rotates. In some working conditions, it is necessary to increase the screw speed to increase the feeding speed. As the screw speed increases, the shear and friction of the material in the barrel will increase, and the resulting heat may sometimes far exceed the level required for plasticization of the material. In order to prevent the material from deteriorating due to overheating in this situation, it is very important to install a good cooling device on the extruder.

[0003] Current cooling devices generally pass chilled water directly into the water jacket of the screw to cool the screw. However, there are many minerals in the chilled water. During the repeated heating and cooling process, scale is easily formed on the inner wall of the pipe, causing pipe blockage. Utility Model Content

[0004] (1) Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is that the pipelines of the existing cooling device are easily blocked by scale.

[0006] (2) Technical solution

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] The utility model provides a granulator cooling system, which is used for cooling a screw, and comprises a cooling flow channel, a circulating soft water pipeline, a circulating chilled water pipeline and a heat exchange unit; the cooling flow channel is arranged in the screw, and has a water inlet and a water outlet; the circulating soft water pipeline is connected to the water inlet and the water outlet, and a soft water cooling medium is introduced into the circulating soft water pipeline; a chilled water cooling medium is introduced into the circulating chilled water pipeline; the heat exchange unit is connected to the circulating soft water pipeline and the circulating chilled water pipeline, so that the soft water cooling medium and the chilled water cooling medium can perform heat exchange.

[0009] Preferably, it further comprises a soft water replenishment pipeline, which is connected to the circulating soft water pipeline.

[0010] Preferably, the soft water replenishment pipeline includes a first pipe, a first filter, a first ball valve and a first check valve. Along the flow direction of soft water in the first pipe, the first ball valve, the first filter and the first check valve are sequentially arranged on the first pipe.

[0011] Preferably, the soft water replenishment pipeline further includes an air pressure tank, which is arranged on the first pipeline and has a buffer air bag arranged inside the air pressure tank.

[0012] Preferably, the circulating soft water pipeline includes a second pipe, a third pipe, a first water supply pipe, a second water supply pipe, a first water pump and a second water pump; the second pipe is connected to the water outlet, the third pipe is connected to the water inlet, the two ends of the first water supply pipe are respectively connected to the second pipe and the third pipe, the two ends of the second water supply pipe are respectively connected to the second pipe and the third pipe, and the first water supply pipe and the second water supply pipe are arranged in parallel, the first water pump is arranged on the first water supply pipe, and the second water pump is arranged on the second water supply pipe.

[0013] Preferably, a second filter is provided on the first water supply pipe, and / or a third filter is provided on the second water supply pipe.

[0014] Preferably, a second ball valve and a second check valve are provided on the first water supply pipe.

[0015] Preferably, the second water supply pipe is provided with a third ball valve and a third check valve.

[0016] Preferably, the granulator cooling system further comprises a control module, the circulating soft water pipeline is provided with a temperature sensor and a pressure sensor, and the control module is electrically connected to the temperature sensor, the pressure sensor, the first water pump and the second water pump respectively.

[0017] Preferably, the heat exchange unit is a plate heat exchanger.

[0018] (3) Beneficial effects

[0019] The above technical solution of the present utility model has at least the following advantages:

[0020] The utility model is modified on the basis of existing equipment, and the original chilled water direct cooling cooling system is transformed into a soft water cooling screw, and a heat exchange unit is used to realize secondary heat exchange between soft water and chilled water. It can utilize the existing chilled water direct cooling cooling system without adding other cooling equipment, so as to reduce the modification cost. At the same time, since the soft water is used to cool the screw, it will not scale inside the pipeline, thereby solving the pipeline blockage problem caused by scaling of the cooling medium in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of the screw provided in an embodiment of the utility model.

[0023] Figure 2 It is a structural schematic diagram of a granulator cooling system provided by an embodiment of the present utility model.

[0024] The reference numerals in the figures are:

[0025] 100. Screw; 1. Cooling channel; 2. Circulating soft water pipeline; 3. Circulating chilled water pipeline; 4. Heat exchange unit; 5. Soft water make-up pipeline; 6. Control module; 11. Water inlet; 12. Water outlet; 21. Second pipeline; 22. Third pipeline; 23. First water supply pipeline; 24. Second water supply pipeline; 25. First water pump; 26. Second water pump; 27. Temperature sensor; 28. Pressure sensor; 29. ​​Metal flexible joint; 31. First solenoid valve; 32. Fourth filter; 33. Third ball valve; 51. First pipeline; 52. Filter; 53. First ball valve; 54. First check valve; 55. Air pressure tank; 56. Second solenoid valve; 231. Second filter; 232. Second ball valve; 233. Second check valve; 241. Third filter; 242. Third ball valve; 243. Third check valve. DETAILED DESCRIPTION

[0026] 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 with reference to 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.

[0027] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate relative importance or the number of technical features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined. The following is a more detailed description of the specific implementation of this utility model in conjunction with specific embodiments:

[0030] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a pelletizer cooling system for cooling a screw 100, comprising a cooling channel 1, a circulating soft water pipeline 2, a circulating chilled water pipeline 3, and a heat exchange unit 4. The cooling channel 1 is disposed within the screw 100 and has a water inlet 11 and a water outlet 12. The circulating soft water pipeline 2 connects the water inlet 11 and the water outlet 12, and a soft water cooling medium flows into the circulating soft water pipeline 2. The circulating chilled water pipeline 3 flows into a chilled water cooling medium. The heat exchange unit 4 connects the circulating soft water pipeline 2 and the circulating chilled water pipeline 3 to enable heat exchange between the soft water cooling medium and the chilled water cooling medium. Furthermore, the circulating chilled water pipeline 3 can be connected to a chiller to achieve circulating cooling of the chilled water cooling medium.

[0031] As one of the optional implementations of this embodiment, a soft water replenishment pipeline 5 is further included, which is connected to the circulating soft water pipeline 2. When the soft water cooling medium in the circulating soft water pipeline 2 is lost or needs to be replaced, the soft water cooling medium can be introduced through the soft water replenishment pipeline 5 for replenishment.

[0032] As one of the optional implementations of this embodiment, the soft water replenishment pipeline 5 includes a first pipe 51, a first filter 52, a first ball valve 53, and a first check valve 54. The first ball valve 53, the first filter 52, and the first check valve 54 are sequentially arranged on the first pipe 51 along the flow direction of the soft water in the first pipe 51. The first filter 52 is used to filter impurities entrained in the first pipe 51. The first check valve 54 is used to prevent the backflow of the cooling medium entering the first pipe 51. The first ball valve 53 is used to manually control the opening and closing of the first pipe 51.

[0033] As an optional implementation of this embodiment, the soft water replenishment pipeline 5 further includes an air pressure tank 55, which is arranged on the first pipe 51 and has a buffer air bag inside the air pressure tank 55. The buffer air bag inside the air pressure tank 55 can be used to maintain a stable pressure in the pipe, thereby stabilizing the water pressure.

[0034] As one of the optional implementations of this embodiment, the circulating soft water pipeline 2 includes a second pipe 21, a third pipe 22, a first water supply pipe 23, a second water supply pipe 24, a first water pump 25 and a second water pump 26; the second pipe 21 is connected to the water outlet 12, the third pipe 22 is connected to the water inlet 11, the two ends of the first water supply pipe 23 are connected to the second pipe 21 and the third pipe 22 respectively, the two ends of the second water supply pipe 24 are connected to the second pipe 21 and the third pipe 22 respectively, and the first water supply pipe 23 and the second water supply pipe 24 are arranged in parallel, the first water pump 25 is arranged on the first water supply pipe 23, and the second water pump 26 is arranged on the second water supply pipe 24. Of the first water supply pipe 23 and the second water supply pipe 24, one pipe serves as a working pipe and the other as a backup pipe to prevent the entire system from malfunctioning when one of the pipes fails. Specifically, the first water pump 25 and the second water pump 26 are connected to the corresponding pipes through a metal flexible joint 29.

[0035] As an optional implementation of this embodiment, a fourth filter 32 and a third ball valve 33 are provided on the circulating chilled water pipeline 3. The fourth filter 32 is used to filter impurities in the circulating chilled water pipeline 3 to reduce impurities entrained in the chilled water cooling medium. The third ball valve 33 is used to manually control the on / off of the circulating chilled water pipeline 3.

[0036] As an optional implementation of this embodiment, a second filter 231 is provided on the first water supply pipe 23, and / or a third filter 241 is provided on the second water supply pipe 24. The second filter 231 is used to filter impurities in the first water supply pipe 23; the third filter 241 is used to filter impurities in the second water supply pipe 24.

[0037] As an optional implementation of this embodiment, a second ball valve 232 and a second check valve 233 are provided on the first water supply pipe 23. The second ball valve 232 is used to manually control the on-off of the first water supply pipe 23.

[0038] As an optional implementation of this embodiment, a third ball valve 242 and a third check valve 243 are provided on the second water supply pipe 24. The third ball valve 242 is used to manually control the on-off of the second water supply pipe 24.

[0039] As an optional embodiment of this embodiment, the pelletizer cooling system further includes a control module 6. The circulating soft water pipeline 2 is equipped with a temperature sensor 27 and a pressure sensor 28. The control module 6 is electrically connected to the temperature sensor 27, the pressure sensor 28, the first water pump 25, and the second water pump 26, respectively. Furthermore, a first solenoid valve 31 is provided on the circulating chilled water pipeline 3, and a second solenoid valve 56 is provided on the soft water supply pipeline 5. The first solenoid valve 31 and the second solenoid valve 56 are electrically connected to the control module 6. The temperature and pressure data transmitted by the temperature sensor 27 and the pressure sensor 28 are used to monitor the temperature and pressure of the cooling medium within the pipelines, and the on / off states and operating power of the first and second water pumps 25, 26 are adjusted based on actual conditions. The first solenoid valve 31 is used to remotely control the on / off state of the circulating chilled water pipeline 3, and the second solenoid valve 56 is used to remotely control the on / off state of the soft water supply pipeline 5.

[0040] As one of the optional implementations of this embodiment, the heat exchange unit 4 is a plate heat exchanger.

[0041] Specifically, when this embodiment is in use, soft water (deionized water) cooling medium is introduced into the circulating soft water pipeline 2, and the water supply temperature is preferably 20°C. It flows into the cooling channel 1 through the water inlet 11, and heat exchange cooling is performed on the screw 100. The soft water cooling medium returns to the heat exchange unit 4 at a temperature of 25°C. The 25°C soft water cooling medium in the circulating soft water pipeline 2 is heat exchanged with the 7°C chilled water cooling medium introduced into the circulating chilled water pipeline 3, so that the 25°C soft water cooling medium is cooled to 20°C, the 7°C chilled water cooling medium is heated to 12°C, and the 20°C soft water cooling medium is introduced into the cooling channel 1 again to circulate cooling on the screw 100. This embodiment is modified on the basis of existing equipment, and the original chilled water direct cooling cooling system is modified to use soft water to cool the screw 100, and the heat exchange unit 4 is used to realize secondary heat exchange between soft water and chilled water. It can use the existing chilled water direct cooling cooling system without adding other cooling equipment, so as to reduce the modification cost. At the same time, since the cooling screw 100 is soft water, it will not scale inside the pipeline, thereby solving the pipeline blockage problem caused by scaling of the cooling medium in the pipeline.

[0042] The utility model has at least the following advantages:

[0043] 1. Low construction and operation costs, small pressure loss, and low energy consumption for equipment operation;

[0044] 2. Fully automatic control, working around the clock, only requires personnel inspection, stable and reliable operation;

[0045] 3. The heat exchange effect is obvious, and the use of desalted water can completely avoid structural risks;

[0046] 4. Simple operation and maintenance, small footprint;

[0047] 5. It can start and stop with the granulation system, and the start time period is more flexible.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A granulator cooling system for cooling a screw, characterized in that: include: A cooling channel is provided in the screw and has a water inlet and a water outlet; A circulating soft water pipeline, connecting the water inlet and the water outlet, wherein soft water cooling medium flows into the circulating soft water pipeline; A circulating chilled water pipeline, wherein a chilled water cooling medium is introduced into the circulating chilled water pipeline; A heat exchange unit is connected to the circulating soft water pipeline and the circulating chilled water pipeline to enable the soft water cooling medium to exchange heat with the chilled water cooling medium.

2. The granulator cooling system according to claim 1, characterized in that: It also includes a soft water replenishment pipeline, which is connected to the circulating soft water pipeline.

3. The granulator cooling system according to claim 2, characterized in that: The soft water replenishment pipeline includes a first pipe, a first filter, a first ball valve and a first check valve. Along the flow direction of soft water in the first pipe, the first ball valve, the first filter and the first check valve are sequentially arranged on the first pipe.

4. The granulator cooling system according to claim 3, characterized in that: The soft water replenishment pipeline further comprises an air pressure tank, which is arranged on the first pipeline and has a buffer air bag arranged in the air pressure tank.

5. The granulator cooling system according to claim 1, characterized in that: The circulating soft water pipeline includes a second pipeline, a third pipeline, a first water supply pipeline, a second water supply pipeline, a first water pump and a second water pump; the second pipeline is connected to the water outlet, the third pipeline is connected to the water inlet, the two ends of the first water supply pipeline are respectively connected to the second pipeline and the third pipeline, the two ends of the second water supply pipeline are respectively connected to the second pipeline and the third pipeline, and the first water supply pipeline and the second water supply pipeline are arranged in parallel, the first water pump is arranged on the first water supply pipeline, and the second water pump is arranged on the second water supply pipeline.

6. The granulator cooling system according to claim 5, characterized in that: A second filter is provided on the first water supply pipe, and / or a third filter is provided on the second water supply pipe.

7. The granulator cooling system according to claim 5, characterized in that: The first water supply pipe is provided with a second ball valve and a second check valve.

8. The granulator cooling system according to claim 5, characterized in that: The second water supply pipe is provided with a third ball valve and a third check valve.

9. The granulator cooling system according to claim 5, characterized in that: The granulator cooling system further includes a control module. The circulating soft water pipeline is provided with a temperature sensor and a pressure sensor. The control module is electrically connected to the temperature sensor, the pressure sensor, the first water pump, and the second water pump, respectively.

10. The granulator cooling system according to claim 1, characterized in that: The heat exchange unit is a plate heat exchanger.

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