CN212288262U - Granulating water circulation system of indirect temperature control extrusion granulator - Google Patents
Granulating water circulation system of indirect temperature control extrusion granulator Download PDFInfo
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- CN212288262U CN212288262U CN202021218279.8U CN202021218279U CN212288262U CN 212288262 U CN212288262 U CN 212288262U CN 202021218279 U CN202021218279 U CN 202021218279U CN 212288262 U CN212288262 U CN 212288262U
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Abstract
The utility model provides a grain water circulating system is cut to indirect temperature control's extrusion granulator, include with the grain water tank and the extrusion granulator of cutting that the grain water pump links to each other, cut the grain water tank and splendid attire have grain water of cutting, still include: the heater can heat the granulating water in the granulating water tank; and the temperature-adjusting water pump is connected to the granulating water tank through a pipeline, can send granulating water in the granulating water tank to the heat exchanger for cooling, and sends the granulating water after cooling back to the granulating water tank. The utility model discloses a set up the temperature that whole grain water tank was controlled in the independent accuse temperature return circuit to the grain water tank, the temperature of the grain cavity of cutting under water of the indirect control extrusion granulator of the temperature through the grain water tank of direct control promptly has avoided directly using the undulant problem of flow that the heat exchanger accuse temperature leads to on cutting the grain water return circuit, can make and cut grain water return circuit and obtain stable flow and temperature.
Description
Technical Field
The utility model relates to a grain water circulating system's accuse temperature structure is cut to extrusion granulator.
Background
The large polyolefin extrusion granulator set usually adopts an underwater granulating mode for granulation, the temperature and flow of granulating water have very important effects on the quality of granular products, when the temperature and flow of the granulating water are too low, a large amount of fine powder can be generated in the granulating process, and meanwhile, the drying efficiency is reduced, so that the water content of the product is too high; when cutting grain temperature and flow when too high, can let granule cooling rate reduce, cause the sizing, form the pit on the particle surface easily simultaneously to too high temperature can bring the inflation of granule, along with the cooling shrinkage gradually of granule, with the moisture package in expecting, seriously influence the particle quality, consequently carry out the strict control to the temperature and the flow of cutting grain water and have the significance to the quality that improves the granule product.
At present, each big petrochemical company's polyolefin extrusion prilling granulator mainly adopts the direct entrance at grain cavity of cutting under water to set up the heat exchanger and carries out the accuse temperature to cutting grain water, and this kind of mode will arouse whole grain water system return circuit flow to descend when the heat exchanger is inside to produce the scale deposit or because of cutting the impurity such as the fine powder that carries in the grain aquatic, piece to block up the heat exchanger pipeline, leads to the temperature in the grain cavity of cutting under water to rise, influences the quality and the yield of granule product.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an indirect temperature control's extrusion granulator cuts grain water circulating system, through setting up the temperature of independent temperature control loop control whole grain water tank to the temperature of grain cavity is cut under water in indirect control, has avoided directly using the heat exchanger to control the temperature at the entrance of grain cavity under water, and the problem that the grain water flow that causes and temperature produced the fluctuation when the heat exchanger pipeline blockked up.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides an indirect temperature control's granule cutting water circulating system of extrusion granulator, includes with the continuous eager grain water tank and the extrusion granulator of eager grain water pump, the splendid attire has the eager grain water in the eager grain water tank, its characterized in that still includes:
the heater can heat the granulating water in the granulating water tank;
the thermoregulation water pump is connected with the granulating water tank through a pipeline, can send granulating water in the granulating water tank to the heat exchanger for cooling, and sends the granulating water after cooling back to the granulating water tank.
The indirect temperature control extrusion granulator grain cutting water circulation system is characterized in that: an outlet temperature transmitter is installed at an outlet of an underwater granulating cavity of the extrusion granulator and connected with a temperature controller, and the temperature controller can also control the heater and the temperature-adjusting water pump.
The indirect temperature control extrusion granulator grain cutting water circulation system is characterized in that: the heat exchanger uses externally connected cooling water as a cooling medium by virtue of a cooling water pipeline, and a cooling water flow control valve is arranged on the cooling water pipeline; the temperature controller is also capable of controlling the cooling water flow control valve.
The indirect temperature control extrusion granulator grain cutting water circulation system is characterized in that: still be equipped with and cut grain water three-way valve, cut the export of grain water pump with a work mouth of grain water three-way valve and be linked together, another work mouth is linked together with the underwater grain cutting cavity of extrusion granulator, and the third work mouth is linked together with cutting the grain water tank.
The indirect temperature control extrusion granulator grain cutting water circulation system is characterized in that: an overflow filter is arranged on an overflow pipeline of the granulating water tank, and an outlet of the overflow filter is connected to the granulating water tank through a third working port of the granulating water three-way valve and a return pipeline between the granulating water tanks.
The indirect temperature control extrusion granulator grain cutting water circulation system is characterized in that: an inlet flow control valve is installed in an underwater pelletizing chamber of the extrusion pelletizer.
The indirect temperature control extrusion granulator grain cutting water circulation system is characterized in that: the heater is an electric heater or a steam heater.
The indirect temperature control extrusion granulator grain cutting water circulation system is characterized in that: one is used and the other is used for preparing two heat exchangers.
The indirect temperature control extrusion granulator grain cutting water circulation system is characterized in that: the downstream of the extrusion granulator is sequentially connected with a particle-water separator and a centrifugal drier, and water liquid separated by the particle-water separator and water liquid removed by the centrifugal drier flow back to the granulating water tank through a granulating water filter.
The indirect temperature control extrusion granulator grain cutting water circulation system is characterized in that: the granulating water tank is connected with a desalted water inlet pipeline, and a desalted water replenishing valve is arranged on the desalted water inlet pipeline; and a grain cutting water tank liquid level meter is arranged on the grain cutting water tank and is in signal connection with the desalted water replenishing valve.
Compared with the prior art, the utility model discloses the beneficial effect who has is:
1) the indirect temperature control mode is adopted, the problems of water flow and temperature fluctuation of grain cutting caused by scaling or blockage in the heat exchanger are avoided, and the underwater grain cutting cavity can obtain stable water temperature and flow, so that the phenomenon of fine powder amount generated due to too low water temperature and flow or material sticking generated due to too high water temperature and flow is reduced, and the quality and yield of particle products are improved.
2) When the upstream extrusion speed and the pelletizing speed are changed, the temperature of the pelletizing water tank can be quickly and accurately controlled by the independent water tank temperature control loop according to the underwater pelletizing requirement, the temperature control time of a pelletizing water system is favorably shortened, and the productivity is improved.
3) The stable temperature and flow can reduce the sticky materials, fine powder and fragments generated during the granulation, which can help to prolong the service life of the cutter and the filter and reduce the blocking probability of the heat exchanger, thereby reducing the operation and maintenance cost of the equipment.
4) The utility model discloses overflow department still cutting grain water tank at grain has set up overflow filtration recovery system, helps reducing the consumption of demineralized water, reduces equipment running cost simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of a granulating water circulation system of an indirect temperature control extrusion granulator.
Fig. 2 is a schematic structural diagram of another embodiment of the present invention.
Detailed Description
As shown in fig. 1, for the utility model provides a pair of granule water circulating system is cut to indirect temperature control's extrusion granulator, include: cut grain water tank 1, cut grain water tank level gauge 2, electric heater 3, temperature controller 4, thermoregulation water pump 5, protection filter 6, heat exchanger 7, cooling water flow control valve 8, desalinized water moisturizing valve 9, overflow filter 10, cut grain water pump 11, cut grain water three-way valve 12, cut grain cavity entry flow control valve 13, extrusion granulator 14, cut grain cavity export temperature transmitter 15, granule and water separator 16, centrifugal drier 17, wet air draught fan 18, particle classification sieve 19, cut grain water filter 20, wherein:
the granulating water tank 1 is a container for containing granulating water, is made of stainless steel materials, is provided with a water inlet at the top and a drain outlet at the bottom, and is used for preventing halogen ions in common industrial water from corroding pollution particles of pipelines, and is generally used for taking desalted water as the granulating water, so that a desalted water inlet pipeline is connected with the granulating water tank, and a desalted water replenishing valve 9 is arranged on the granulating water tank;
the granulating water tank liquid level meter 2 is installed on the granulating water tank 1 and used for monitoring the liquid level in the granulating water tank 1, and when the liquid level is lower than a set value, the desalted water replenishing valve 9 is opened to replenish desalted water into the granulating water tank 1;
the electric heater 3 is arranged at the lower part of the granulating water tank 1 and is used for heating granulating water;
the temperature controller 4 is arranged at the bottom of the granulating water tank 1, can receive a temperature signal transmitted from an outlet temperature transmitter 15 arranged at an outlet of an underwater granulating cavity of the extrusion granulator 14, and controls and monitors the water temperature in the granulating water tank 1 according to the temperature signal;
the temperature-regulating water pump 5 is connected to the bottom of the granulating water tank 1 through a pipeline, can send the granulating water in the granulating water tank 1 to the heat exchanger 7 for cooling, and sends the cooled granulating water back to the granulating water tank 1 to form a circulation loop;
the protective filter 6 is arranged at an inlet of the heat exchanger 7 and used for filtering fine powder, chips and other impurities carried in the granulating water and preventing the heat exchange efficiency from being reduced due to the blockage of a pipeline inside the heat exchanger 7;
the heat exchanger 7 uses externally connected cooling water as a cooling medium by virtue of a cooling water pipeline;
a cooling water flow control valve 8 installed on the cooling water pipeline and capable of adjusting the flow of cooling water to adjust the cooling power of the heat exchanger 7 and regulate and control the water temperature of the grain cutting water tank 1;
the overflow filter 10 is installed on an overflow pipeline of the granulating water tank 1, an outlet of the overflow filter is connected to the granulating water tank 1 through a return pipeline of a granulating water three-way valve 12, and when the liquid level in the granulating water tank 1 exceeds a high water level to generate overflow, the overflow water can be subjected to impurity removal through the overflow filter 10 and then flows back to the granulating water tank 1;
the granulating water pump 11 is connected with the bottom of the granulating water tank 1 through an independent pipeline, and can continuously send the granulating water with the temperature controlled in the water tank to an underwater granulating cavity of the extrusion granulator 14;
a grain cutting water three-way valve 12, one working port of which is communicated with the outlet of the grain cutting water pump 11, the other working port is communicated with the underwater grain cutting cavity of the extrusion granulator 14, and the third working port is communicated with the grain cutting water tank 1; when the extruder is started, the granulating water can be sent to the position near the granulating cavity of the extruder in advance, and the starting of the granulator, the water inlet of the water chamber and the direct connection of materials are ensured. An extrusion granulator 14, wherein an inlet flow control valve 13 and an outlet temperature transmitter 15 are installed at the underwater pelletizing cavity, so that the flow and the temperature of the underwater pelletizing cavity can be monitored;
a pellet and water separator 16 disposed downstream of the pellet water of the extruder-granulator 14 for pre-dewatering the pellets;
a centrifugal drier 17 connected to the particle and water separator 16 for drying the pre-dehydrated particles, wherein a wet air draft fan 18 is provided at an outlet of the centrifugal drier 17 for pumping out wet air in the centrifugal drier 17 and sucking fresh air into the centrifugal drier 17;
a grading sieve 19 connected with the centrifugal drier 17 for sieving the dried particles, removing the particles with unqualified sizes and obtaining finished particles;
cut grain water filter 20, centrifugal drier 17 and granule and water separator 16 are connected to one end, grain water tank 1 is cut in the other end connection, follow granule and water separator 16 and centrifugal drier 17 and deviate from the higher grain water of temperature through cutting grain water filter 20 after removing the impurity in the aquatic, flow back to cutting grain water tank 1, and cut grain water that the temperature is lower in the grain water tank 1 and accomplish to become the qualified grain water of temperature after the heat exchange, get into the grain circulation of the next round afterwards.
The utility model discloses in the time of using, the temperature in the grain cutting water tank 1 is generally low on the low side at the start stage, can use electric heater 3 to heat it to suitable temperature, later cut grain water in the grain cutting water tank 1 through cutting grain water pump 11, cut grain water three-way valve 12 gets into extrusion granulator 14, cut the granule of cutting good and cool down, and send it into downstream granule and water separator 16, the granule of separating carries out drying process through centrifugal drier 17, the granule after the drying passes through the screening of classifying screen 19, the qualified granule of size is the finished product granule, and the water liquid that is separated out by granule and water separator 16 and the water liquid that centrifugal drier 17 got rid of pass through grain cutting water filter 20, flow back to grain cutting water tank 1 once more; in the process, the temperature of the granulating water in the granulating water tank 1 is increased by heat generated in the extrusion granulation process, so that the particle processing quality is influenced, and therefore, the granulating water in the granulating water tank 1 is led out by the temperature regulating water pump 5, exchanges heat with a cooling water pipeline in the heat exchanger 7, and flows back to the granulating water tank 1 after being cooled; the temperature information of the water flowing out of the extrusion granulator 14, measured by the outlet temperature transmitter 15, is transmitted to the temperature controller 4, and the temperature controller 4 coordinates and controls the power of the electric heater 3, the power of the temperature-adjusting water pump 5 and/or the opening of the cooling water flow control valve 8 (i.e., controls the flow of the cooling water pipeline) to adjust the water temperature in the granulating water tank 1.
Referring to fig. 2, another embodiment of the present invention is shown, which is different from the previous embodiment in that the electric heater 3 is replaced by a steam heater 3A, and the heat exchanger 7 is replaced by two heat exchangers 7A and 7B. The mode of adopting steam heating and increasing the outfit to the heat exchanger can improve the reliability of system, is applicable to the condition that has the steam conduit in the factory, needs the continuous operation simultaneously.
Compared with the prior art, the utility model, no longer directly set up heater (or called heat exchanger) at the entrance of the underwater grain cutting cavity of extrusion granulator 14, but through setting up the temperature of independent accuse temperature return circuit and controlling whole grain cutting water tank 1 to cutting grain water tank 1, the temperature of the underwater grain cutting cavity of indirect control extrusion granulator 14 of the temperature through the grain cutting water tank 1 of direct control promptly, the flow fluctuation problem that directly uses the heat exchanger to control the temperature and lead to on cutting grain water circuit has been avoided, can make and cut grain water circuit and obtain stable flow and temperature, its advantage is very obvious, mainly embody in following several aspects:
1) the indirect temperature control mode is adopted, the problems of water flow and temperature fluctuation of grain cutting caused by scaling or blockage in the heat exchanger are avoided, and the underwater grain cutting cavity can obtain stable water temperature and flow, so that the phenomenon of fine powder amount generated due to too low water temperature and flow or material sticking generated due to too high water temperature and flow is reduced, and the quality and yield of particle products are improved.
2) When the upstream extrusion speed and the pelletizing speed are changed, the temperature of the pelletizing water tank can be quickly and accurately controlled by the independent water tank temperature control loop according to the underwater pelletizing requirement, the temperature control time of a pelletizing water system is favorably shortened, and the productivity is improved.
3) The stable temperature and flow can reduce the sticky materials, fine powder and fragments generated during the granulation, which can help to prolong the service life of the cutter and the filter and reduce the blocking probability of the heat exchanger, thereby reducing the operation and maintenance cost of the equipment.
4) The utility model discloses overflow department still cutting grain water tank at grain has set up overflow filtration recovery system, helps reducing the consumption of demineralized water, reduces equipment running cost simultaneously.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides an indirect temperature control's granule cutting water circulating system of extrusion granulator, includes with the continuous eager grain water tank and the extrusion granulator of eager grain water pump, the splendid attire has the eager grain water in the eager grain water tank, its characterized in that still includes:
the heater can heat the granulating water in the granulating water tank;
the thermoregulation water pump is connected with the granulating water tank through a pipeline, can send granulating water in the granulating water tank to the heat exchanger for cooling, and sends the granulating water after cooling back to the granulating water tank.
2. The indirect temperature control pelletizing water circulation system of extrusion pelletizer as claimed in claim 1, characterized in that: an outlet temperature transmitter is installed at an outlet of an underwater granulating cavity of the extrusion granulator and connected with a temperature controller, and the temperature controller can also control the heater and the temperature-adjusting water pump.
3. The indirect temperature control pelletizing water circulation system of extrusion pelletizer as claimed in claim 2, characterized in that: the heat exchanger uses externally connected cooling water as a cooling medium by virtue of a cooling water pipeline, and a cooling water flow control valve is arranged on the cooling water pipeline; the temperature controller is also capable of controlling the cooling water flow control valve.
4. The indirect temperature control pelletizing water circulation system of extrusion pelletizer as claimed in claim 1, characterized in that: still be equipped with and cut grain water three-way valve, cut the export of grain water pump with a work mouth of grain water three-way valve and be linked together, another work mouth is linked together with the underwater grain cutting cavity of extrusion granulator, and the third work mouth is linked together with cutting the grain water tank.
5. The indirect temperature control pelletizing water circulation system of extrusion pelletizer as claimed in claim 4, characterized in that: an overflow filter is arranged on an overflow pipeline of the granulating water tank, and an outlet of the overflow filter is connected to the granulating water tank through a third working port of the granulating water three-way valve and a return pipeline between the granulating water tanks.
6. The indirect temperature control pelletizing water circulation system of extrusion pelletizer as claimed in claim 1, characterized in that: an inlet flow control valve is installed in an underwater pelletizing chamber of the extrusion pelletizer.
7. The indirect temperature control pelletizing water circulation system of extrusion pelletizer as claimed in claim 1, characterized in that: the heater is an electric heater or a steam heater.
8. The indirect temperature control pelletizing water circulation system of extrusion pelletizer as claimed in claim 1, characterized in that: one is used and the other is used for preparing two heat exchangers.
9. The indirect temperature control pelletizing water circulation system of extrusion pelletizer as claimed in claim 1, characterized in that: the downstream of the extrusion granulator is sequentially connected with a particle-water separator and a centrifugal drier, and water liquid separated by the particle-water separator and water liquid removed by the centrifugal drier flow back to the granulating water tank through a granulating water filter.
10. The indirect temperature control pelletizing water circulation system of extrusion pelletizer as claimed in claim 1, characterized in that: the granulating water tank is connected with a desalted water inlet pipeline, and a desalted water replenishing valve is arranged on the desalted water inlet pipeline; and a grain cutting water tank liquid level meter is arranged on the grain cutting water tank and is in signal connection with the desalted water replenishing valve.
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| CN202021218279.8U CN212288262U (en) | 2020-06-28 | 2020-06-28 | Granulating water circulation system of indirect temperature control extrusion granulator |
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| CN202021218279.8U CN212288262U (en) | 2020-06-28 | 2020-06-28 | Granulating water circulation system of indirect temperature control extrusion granulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114161631A (en) * | 2021-12-01 | 2022-03-11 | 江苏贝尔机械有限公司 | Novel energy-saving cooling water ring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114161631A (en) * | 2021-12-01 | 2022-03-11 | 江苏贝尔机械有限公司 | Novel energy-saving cooling water ring device |
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