Safe product drying equipment

Abstract

The utility model provides safe product drying equipment which comprises a boiling dryer, a heater, a circulating fan, a blowback dust remover, a secondary dust remover and a condenser, a feed hopper is arranged at the top of the boiling dryer, a first connecting port is formed in the bottom of the boiling dryer, a second connecting port is formed in the top of the boiling dryer, and an air outlet of the circulating fan is connected to the first connecting port through the heater. An air inlet of the blowback dust remover is connected with the first connecting port, an air inlet of the secondary dust remover is connected with the second connecting port, an air outlet of the secondary dust remover is connected with an inlet of the condenser, and an outlet of the condenser is connected with an inlet of the collecting tank and an air inlet of the circulating fan; an air outlet of the back-blowing dust remover is connected to the second connecting port, and an air outlet of the heater is further connected to the connecting position of the second connecting port. The utility model has the beneficial effects that the equipment is high in safety, the whole system runs in a closed manner, the feeding and discharging dust is reduced, the operation is simple, the drying efficiency is high, and the solvent recovery rate is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical product drying, in particular to safe product drying equipment. Background Art

[0002] During the production of azoxystrobin, it needs to be dried to remove the residual solvent after centrifugation. In existing operations, double-cone drying is used. Steam is introduced into the jacket of the double-cone dryer, material is added to the inner drum, and the material is dried by the rotation of the double-cone dryer. However, this drying method has the following disadvantages: the drying process is relatively long; if the melting point of the material is low, excessively high temperatures will cause the material to gel and deteriorate, and steam heating makes temperature control difficult due to changes in steam pressure and temperature; the structure of the jacket passing steam has a low safety factor, and overpressure is prone to safety accidents; because the cone is in a rotating state, the evaporated solvent will condense again as the drum rotates, resulting in a reduced solvent recovery rate; manual loading and unloading of materials and excessive dust in the operating environment pose a greater risk to operators. Utility Model Content

[0003] In view of this, the present invention aims to overcome the deficiencies of the above-mentioned problems in the prior art and provide a safe product drying device.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] A safe product drying equipment includes a boiling dryer, a heater, a circulating fan, a back-blowing dust collector, a secondary dust collector and a condenser. The boiling dryer is provided with a feed hopper on the top, a first connecting port on the bottom and a second connecting port on the top. The air outlet of the circulating fan is connected to the first connecting port through the heater, the air inlet of the back-blowing dust collector is connected to the first connecting port, the air inlet of the secondary dust collector is connected to the second connecting port, and the air outlet of the secondary dust collector is connected to the inlet of the condenser. The outlet of the condenser is respectively connected to the inlet of a collection tank and the air inlet of the circulating fan, and the air outlet of the back-blowing dust collector is connected to the second connecting port. The air outlet of the heater is also connected to the second connecting port. The first connecting port is also connected to a discharge pipe.

[0006] Furthermore, the air inlet of the circulating fan, the air inlet at the top of the boiling dryer and the air inlet at the top of the secondary dust collector are all connected to a nitrogen source.

[0007] Furthermore, the air outlet of the circulating fan and the air inlet of the heater are connected together through a first conduit, and a vent, a first switch valve and an oxygen content detector are provided on the first conduit.

[0008] Furthermore, the air outlet of the heater and the first connecting port are connected together through a second conduit, and a second switch valve and a temperature control valve are provided on the second conduit.

[0009] The air inlet and the first connecting port of the back-blowing dust collector are connected together through a third conduit, and a third switch valve is provided on the third conduit.

[0010] The second connecting port and the air inlet at the bottom of the secondary dust collector are connected together through a fourth conduit, and the air outlet of the back-blowing dust collector and the fourth conduit are connected together through a fifth conduit, and a fifth switch valve is provided on the fifth conduit.

[0011] The second conduit and the fourth conduit are connected through a sixth conduit, and a sixth switch valve is provided on the sixth conduit. A fourth switch valve is provided on the fourth conduit between the fifth conduit and the sixth conduit.

[0012] The second on-off valve is located on the second conduit between the first connection port and the sixth conduit.

[0013] Furthermore, a first differential pressure gauge is provided on the second conduit between the second switch valve and the sixth conduit and the second connecting port, and a first pressure relief valve is provided on the fourth conduit between the second connecting port and the fourth switch valve.

[0014] Furthermore, the air outlet at the top of the secondary dust collector is connected to the inlet of the condenser through the seventh duct, and a second differential pressure gauge is provided between the air inlet at the bottom of the secondary dust collector and the air outlet at the top, and a second pressure relief valve is provided on the seventh duct.

[0015] Furthermore, the air inlet of the circulating fan is connected to the nitrogen source through an eighth conduit, and a seventh switch valve is provided on the eighth conduit.

[0016] Furthermore, a plurality of spray pipes connected to a water source are provided inside the boiling dryer, and a manual valve is provided on the discharge pipe.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The safe product drying equipment described in the utility model uses a circulating fan to transport high-temperature airflow into a boiling dryer through a heater, thereby drying the material in the boiling dryer, and causing the solvent in the material to evaporate and be condensed in a condenser and recovered into a collection tank; the dried material is finally discharged through a discharge pipe at the first connecting port; and, during the drying process, the airflow carrying part of the material is dusted by a secondary dust collector, and the back-flushing operation of the bag in the boiling dryer is achieved by cooperating with the back-flushing dust collector, the fan, and the boiling dryer; the equipment has high safety, and the entire system is in a closed operation state, which reduces the dust of the input and output materials, thereby reducing the dust damage at the operation site, and is simple to operate, can be automatically controlled, and has high drying efficiency and solvent recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic structural diagram of a safe product drying device according to an embodiment of the present utility model.

[0021] Description of reference numerals:

[0022] 1. Fluidizing dryer; 2. Heater; 3. Circulating fan; 4. Back-blowing dust collector; 5. Secondary dust collector; 6. Condenser; 7. Collection tank; 8. First conduit; 9. Vent; 10. First on-off valve; 11. Oxygen content detector; 12. Second conduit; 13. Second on-off valve; 14. Temperature control valve; 15. Third conduit; 16. Third on-off valve; 17. Fourth conduit; 18. Fourth on-off valve; 19. Fifth conduit; 20. Fifth on-off valve; 21. Sixth conduit; 22. Sixth on-off valve; 23. First differential pressure gauge; 24. First pressure relief valve; 25. Seventh conduit; 26. Second differential pressure gauge; 27. Second pressure relief valve; 28. Third pressure relief valve; 29. Eighth conduit; 30. Seventh on-off valve; 31. Discharge pipe; 32. Manual valve; 33. Feed hopper. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0027] As shown in the figure, a safe product drying equipment includes a boiling dryer 1, a heater 2, a circulating fan 3, a back-blowing dust collector 4, a secondary dust collector 5 and a condenser 6. The boiling dryer 1 is provided with a feed hopper 33 on the top, a first connecting port on the bottom, and a second connecting port on the top. The air outlet of the circulating fan 3 is connected to the first connecting port through the heater 2, the air inlet of the back-blowing dust collector 4 is connected to the first connecting port, the air inlet of the secondary dust collector 5 is connected to the second connecting port, and the air outlet of the secondary dust collector 5 is connected to the inlet of the condenser 6. The outlet of the condenser 6 is respectively connected to the inlet of the collecting tank 7 and the air inlet of the circulating fan 3, and the air outlet of the back-blowing dust collector 4 is connected to the second connecting port. The air outlet of the heater 2 is also connected to the second connecting port, and the first connecting port is also connected to a discharge pipe 31. In this embodiment, a high-temperature airflow is transported into the boiling dryer 1 through the circulating fan 3 via the heater 2 to dry the material in the boiling dryer 1, so that the solvent in the material evaporates and is condensed in the condenser 6 and recovered into the collection tank 7; the dried material is finally discharged through the discharge pipe 31 of the first connection port; and during the drying process, the airflow carrying part of the material is dedusted by the secondary dust collector 5, and the back-blowing dust collector 4 cooperates with the fan and the boiling dryer 1 to realize the back-blowing operation of the bag in the boiling dryer 1.

[0028] The air inlet of the circulating fan 3, the air inlet at the top of the fluidized bed dryer 1, and the air inlet at the top of the secondary dust collector are all connected to a nitrogen source. In this embodiment, the nitrogen source not only fills the equipment with nitrogen before starting the drying process, creating a safe operating environment, but also backflushes the bags in the fluidized bed dryer 1 and the secondary dust collector.

[0029] The air outlet of the circulating fan 3 and the air inlet of the heater 2 are connected by a first conduit 8, which is equipped with a vent 9, a first on-off valve 10, and an oxygen content detector 11. In this embodiment, the residual airflow in the system can be discharged through the vent 9, and the oxygen content in the airflow within the system is detected by the oxygen content detector 11. This is because the residual solvent of azoxystrobin after centrifugation is methanol, which is flammable and explosive. Therefore, the oxygen content in the system needs to be controlled. The system can only be started when the oxygen content is below 5% of the total volume.

[0030] The air outlet of the heater 2 and the first connecting port are connected together through a second conduit 12, and a second switch valve 13 and a temperature control valve 14 are provided on the second conduit 12. The air inlet of the back-blowing dust collector 4 and the first connecting port are connected together through a third conduit 15, and a third switch valve 16 is provided on the third conduit 15. The second connecting port and the air inlet at the bottom of the secondary dust collector 5 are connected together through a fourth conduit 17. The air outlet of the back-blowing dust collector 4 and the fourth conduit 17 are connected together through a fifth conduit 19, and a fifth switch valve 20 is provided on the fifth conduit 19. The second conduit 12 and the fourth conduit 17 are connected through a sixth conduit 21, and a sixth switch valve 22 is provided on the sixth conduit 21. A fourth switch valve 18 is provided on the fourth conduit 17 between the fifth conduit 19 and the sixth conduit 21. The second switch valve 13 is located between the first connecting port and the sixth conduit 21 on the second conduit 12.

[0031] A first differential pressure gauge 23 is installed on the second conduit 12, corresponding to the area between the second on-off valve 13 and the sixth conduit 21, and between the second connection port. A first pressure relief valve 24 is installed on the fourth conduit 17, between the second connection port and the fourth on-off valve 18. In this embodiment, the pressure within the fluidized bed dryer 1 is monitored by the first differential pressure gauge 23 during the backflush process, and the pressure is promptly relieved through the first pressure relief valve 24. Furthermore, a third pressure relief valve 28 is provided on the fluidized bed dryer 1 to ensure its safety.

[0032] The air outlet at the top of the secondary dust collector 5 is connected to the inlet of the condenser 6 via a seventh conduit 25. A second differential pressure gauge 26 is provided between the air inlet at the bottom and the air outlet at the top of the secondary dust collector 5. A second pressure relief valve 27 is provided on the seventh conduit 25. In this embodiment, the pressure within the secondary dust collector 5 is monitored by the second differential pressure gauge 26, and the pressure is promptly relieved through the second pressure relief valve 27.

[0033] The air inlet of the circulating fan 3 is connected to the nitrogen source through the eighth conduit 29, and a seventh switch valve 30 is provided on the eighth conduit 29 for replenishing nitrogen into the system.

[0034] A plurality of spray pipes connected to a water source are provided inside the boiling dryer 1 for cleaning the inside of the boiling dryer 1 . A manual valve 32 is provided on the discharge pipe 31 for discharging the wastewater after cleaning in the boiling dryer 1 .

[0035] In this embodiment, the first on-off valve 10, the second on-off valve 13, the third on-off valve 16, the fourth on-off valve 18, the fifth on-off valve 20, the sixth on-off valve 22, and the seventh on-off valve 30 are all solenoid valves connected to a PLC, whose opening and closing are controlled by the PLC. Furthermore, each pressure relief valve, differential pressure gauge, and oxygen content detector 11 are also connected to the PLC, achieving automated control of the entire system. Since the innovation of this solution does not focus on PLC control, and this is a conventional technique within the skill of those skilled in the art, the specific connection structures will not be described here.

[0036] In this embodiment, the connections between the catheters are all made using three-way interfaces for connection.

[0037] The working process of this embodiment is as follows:

[0038] like Figure 1 As shown, the direction of the arrow in the figure is the direction of airflow. Nitrogen is filled into the entire set of equipment through a nitrogen source, and the oxygen content in the equipment is detected by an oxygen content detector 11 to determine whether the startup conditions are met. After startup, open the first switch valve 10 and the second switch valve 13, use the circulating fan 3 to generate power, heat the airflow through the heater 2, and blow it into the boiling dryer 1 through the first connection port, blow the material above the sieve plate in the boiling dryer 1 to boiling, and use the hot air to accelerate the evaporation of the solvent; after drying, open the fourth switch valve 18, and the evaporated solvent follows the airflow from the second connection port through the secondary dust collector 5 to remove part of the material entrained in the airflow, and then enters the condenser 6 for condensation and recovers methanol through the collection tank 7; the dried material can be discharged through the discharge pipe 31 at the first connection port;

[0039] When back-flushing the bags in the boiling dryer 1, the second on-off valve 13 and the fourth on-off valve 18 are closed, and the sixth on-off valve 22, the third on-off valve 16 and the fifth on-off valve 20 are opened. The airflow is blown out by the circulating fan 3 and enters the boiling dryer 1 through the second conduit 12, the sixth conduit 21 and the fourth conduit 17. After back-flushing the bags in the boiling dryer 1, the airflow enters the back-flushing dust collector 4 from the first connecting port through the third conduit 15, and then enters the secondary dust collector through the fifth conduit 19 and the fourth conduit 17 for dust removal, and finally enters the condenser 6 through the seventh conduit 25 for condensation and is recovered into the recovery tank.

[0040] The airflow after passing through the condenser 6 is then sucked in by the circulation fan 3 and passes through the heater 2 to form a cycle.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. 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 safe product drying device, characterized by: The utility model comprises a boiling dryer, a heater, a circulating fan, a back-blowing dust collector, a secondary dust collector and a condenser. The boiling dryer is provided with a feed hopper at the top, a first connecting port at the bottom and a second connecting port at the top. The air outlet of the circulating fan is connected to the first connecting port through the heater, the air inlet of the back-blowing dust collector is connected to the first connecting port, the air inlet of the secondary dust collector is connected to the second connecting port, and the air outlet of the secondary dust collector is connected to the inlet of the condenser. The outlet of the condenser is respectively connected to the inlet of the collecting tank and the air inlet of the circulating fan, and the air outlet of the back-blowing dust collector is connected to the second connecting port. The air outlet of the heater is also connected to the second connecting port. The first connecting port is also connected to a discharge pipe.

2. A safe product drying device according to claim 1, characterized in that: The air inlet of the circulation fan, the air inlet on the top of the boiling dryer and the air inlet on the top of the secondary dust collector are all connected to the nitrogen source.

3. A safe product drying device according to claim 1, characterized in that: The air outlet of the circulating fan and the air inlet of the heater are connected together through a first conduit, and a vent, a first switch valve and an oxygen content detector are provided on the first conduit.

4. A safe product drying device according to claim 2, characterized in that: The air outlet of the heater and the first connection port are connected together through a second conduit, and a second switch valve and a temperature control valve are provided on the second conduit. The air inlet and the first connecting port of the back-blowing dust collector are connected together through a third conduit, and a third switch valve is provided on the third conduit. The second connecting port and the air inlet at the bottom of the secondary dust collector are connected together through a fourth conduit, and the air outlet of the back-blowing dust collector and the fourth conduit are connected together through a fifth conduit, and a fifth switch valve is provided on the fifth conduit. The second conduit and the fourth conduit are connected through a sixth conduit, and a sixth switch valve is provided on the sixth conduit. A fourth switch valve is provided on the fourth conduit between the fifth conduit and the sixth conduit. The second on-off valve is located on the second conduit between the first connection port and the sixth conduit.

5. A safe product drying device according to claim 4, characterized in that: A first differential pressure gauge is provided on the second conduit between the second switch valve and the sixth conduit and the second connecting port, and a first pressure relief valve is provided on the fourth conduit between the second connecting port and the fourth switch valve.

6. A safe product drying device according to claim 1, characterized in that: The air outlet at the top of the secondary dust collector is connected to the inlet of the condenser through the seventh duct, and a second differential pressure gauge is provided between the air inlet at the bottom of the secondary dust collector and the air outlet at the top, and a second pressure relief valve is provided on the seventh duct.

7. A safe product drying device according to claim 2, characterized in that: The air inlet of the circulating fan is connected to the nitrogen source through an eighth conduit, and a seventh switch valve is provided on the eighth conduit.

8. The safe product drying equipment according to claim 1, characterized in that: There are multiple spray pipes connected to the water source inside the boiling dryer, and a manual valve is provided on the discharge pipe.

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