阅读说明：本技术 闭路循环干燥装置 (Closed cycle drying device ) 是由 万立立 徐久华 葛仕福 韦诗伦 徐霞 叶敏明 于 2020-05-07 设计创作，主要内容包括：本发明提出一种闭路循环干燥装置,包括加料组件、与加料组件连接的分级粉碎干燥装置、旋风分离器、布袋除尘器、冷凝器、除雾器、引风机以及换热器,换热器、分级粉碎干燥装置连接、旋风分离器、布袋除尘器、冷凝器、除雾器、引风机依次连接,且引风机与换热器连接,形成干燥介质闭路循环系统。本发明所述的闭路循环干燥装置具有有效降低了成本、提高了安全性、解决了干燥时VOC排放难题、提升了干燥介质的有效使用率的优点。(The invention provides a closed-loop circulation drying device which comprises a feeding assembly, a grading crushing drying device, a cyclone separator, a bag-type dust collector, a condenser, a demister, an induced draft fan and a heat exchanger, wherein the grading crushing drying device, the cyclone separator, the bag-type dust collector, the condenser, the demister and the induced draft fan are connected in sequence, and the induced draft fan is connected with the heat exchanger to form a closed-loop circulation system of a drying medium. The closed cycle drying device has the advantages of effectively reducing the cost, improving the safety, solving the problem of VOC emission during drying and improving the effective utilization rate of a drying medium.)

1. The utility model provides a closed cycle drying device, a serial communication port, including reinforced subassembly, the hierarchical crushing drying device who is connected with reinforced subassembly, cyclone (8), sack cleaner (11), condenser (13), defroster (15), draught fan (16) and heat exchanger (1), the hierarchical crushing drying device is connected, cyclone (8), sack cleaner (11), condenser (13), defroster (15), draught fan (16) connect gradually, and draught fan (16) are connected with heat exchanger (1), form dry medium closed cycle system.

2. The closed cycle drying apparatus of claim 1, wherein the drying medium is an inert gas.

3. The closed cycle drying device according to claim 1, wherein the feeding assembly comprises a positive pressure bin (7) and a screw feeder (6), and a first discharge port of the positive pressure bin (7) is connected with the classification crushing drying device through the screw feeder (6).

4. The closed-loop circulation drying device according to claim 3, wherein the classification crushing drying device comprises a main drying machine (2) and a drying tower (4), the main drying machine (2) is connected with the drying tower (4), a crusher (3) and a classifier (5) are arranged in the drying tower (4), and a spiral feeder (6) is connected with the main drying machine (2).

5. The closed cycle drying device according to claim 1, wherein a second discharge port is arranged at the bottom of the cyclone separator (8), a blower is arranged on the second discharge port, a third discharge port is arranged at the bottom of the bag-type dust collector (11), the second discharge port and the third discharge port are both connected with a gathering auger (10), and the gathering auger is connected with a dry product bin (9).

6. The closed cycle drying device according to claim 1 or 5, wherein the bag-type dust collector (11) is connected with a back suction fan (12), an eighth air inlet of the back suction fan (12) is communicated with a fourth air outlet of the bag-type dust collector (11), and an eighth air outlet of the back suction fan (12) is connected with the bag-type dust collector (11) and is used for guiding the drying medium discharged from the bag-type dust collector (11) into the bag-type dust collector (11) again for dust collection.

7. The closed cycle drying unit according to claim 1, wherein the condenser (13) and the demister (15) are both connected to a condensation tank (14).

8. A closed cycle drying unit according to claim 1, characterized in that the heat exchanger (1) is a steam heat exchanger.

Technical Field

The invention relates to the field of drying equipment, in particular to a closed-loop circulating drying device.

Background

The dryer is a common device in the production field of solid preparations such as pharmacy, chemical industry, food and the like, in the drying process, the dried materials are lost along with the transmission of a drying medium, and when the materials of anaerobic materials or flammable and explosive solvents are dried, oxygen exists in the traditional dryer, the phenomenon of combustion or oxidation can occur, and the danger in the drying process is enhanced. Meanwhile, the drying medium of the existing dryer is generally discharged as waste gas after drying, so that the environment is polluted, and meanwhile, the waste of resources is also caused.

Disclosure of Invention

It is an object of the present invention to provide a closed cycle drying apparatus which solves one or more of the above mentioned problems of the prior art.

The invention provides a closed-loop circulation drying device which comprises a feeding assembly, a grading crushing drying device, a cyclone separator, a bag-type dust collector, a condenser, a demister, an induced draft fan and a heat exchanger, wherein the grading crushing drying device, the cyclone separator, the bag-type dust collector, the condenser, the demister and the induced draft fan are connected in sequence, and the induced draft fan is connected with the heat exchanger to form a closed-loop circulation system of a drying medium.

In certain embodiments, the drying medium employs an inert gas.

In certain embodiments, the feeding assembly comprises a positive pressure bin and a spiral feeder, and the first discharge port of the positive pressure bin is connected with the graded crushing and drying device through the spiral feeder.

In some embodiments, the grading crushing and drying device comprises a drying main machine and a drying tower, the drying main machine is connected with the drying tower, a crusher and a classifier are arranged in the drying tower, and the spiral feeder is connected with the drying main machine.

In some embodiments, a second discharge port is arranged at the bottom of the cyclone separator, a fan is arranged on the second discharge port, a third discharge port is arranged at the bottom of the bag-type dust collector, the second discharge port and the third discharge port are both connected with a material collecting auger, and the material collecting auger is connected with a dry product bin.

In some embodiments, the bag-type dust collector is connected with a reverse suction fan, an eighth air inlet of the reverse suction fan is communicated with a fourth air outlet of the bag-type dust collector, and an eighth air outlet of the reverse suction fan is connected with the bag-type dust collector and used for guiding the drying medium discharged by the bag-type dust collector into the bag-type dust collector again for dust removal.

In certain embodiments, the condenser and demister are both connected to a condensing tank.

In certain embodiments, the heat exchanger is a steam heat exchanger.

The closed cycle drying device has the advantages that:

1) inert gas is used as a drying medium, so that the problem of oxidation in the material drying process is effectively avoided, and the effective content of the material is ensured;

2) inert gas is used as a drying medium, so that the phenomenon of deflagration during drying is avoided;

3) the drying medium closed-loop circulating system is adopted, so that the drying medium is recycled in the closed-loop circulating drying device, the problem of VOC (volatile organic compound) emission during drying is solved, the effective utilization rate of the drying medium is effectively improved, and resource waste is avoided;

4) the grading crushing and drying device integrating drying, crushing and grading is used as the main equipment of the closed-loop circulating drying device, so that the operation cost is effectively reduced, and the materials are more refined.

Drawings

Fig. 1 is a schematic structural view of a closed cycle drying apparatus according to an embodiment of the present invention.

Detailed Description

As shown in figure 1, the closed cycle drying device comprises a feeding assembly, a grading crushing drying device connected with the feeding assembly, a cyclone separator 8, a bag-type dust collector 11, a condenser 13, a demister 15, an induced draft fan 16 and a heat exchanger 1,

the feeding assembly comprises a positive pressure bin 7 and a spiral feeder 6,

the grading crushing and drying device comprises a drying main machine 2 and a drying tower 4,

a first discharge hole of the positive pressure bin 7 is connected with a drying main machine 2 through a spiral feeder 6, the drying main machine 2 is connected with a drying tower 4, a crusher 3 and a classifier 5 are arranged in the drying tower 4,

the bottom of the cyclone separator 8 is provided with a second discharge port, the second discharge port is provided with a blower, the bottom of the bag-type dust collector 11 is provided with a third discharge port, the second discharge port and the third discharge port are both connected with a gathering auger 10, the gathering auger is connected with a dry product bin 9,

the bottoms of the condenser 13 and the demister 15 are both provided with drain pipes and are both connected with the condensation storage tank 14 through the drain pipes,

the first air outlet of the heat exchanger 1 is connected with the second air inlet of the drying main machine 2, the drying main machine 2 is connected with the drying tower 4, the second air outlet on the drying tower 4 is connected with the third air inlet of the cyclone separator 8, the third air outlet of the cyclone separator 8 is connected with the fourth air inlet of the bag-type dust collector 11, the fourth air outlet of the bag-type dust collector 11 is connected with the fifth air inlet of the condenser 13, the fifth air outlet of the condenser 13 is connected with the sixth air inlet of the demister 15, the sixth air outlet of the demister 15 is connected with the seventh air inlet of the induced draft fan 16, the seventh air outlet of the induced draft fan 16 is connected with the first air inlet of the heat exchanger 1 to form a closed circulation system of drying media,

wherein the drying medium adopts inert gas,

the bag-type dust collector 11 is connected with a reverse suction fan 12, an eighth air inlet of the reverse suction fan 12 is communicated with a fourth air outlet of the bag-type dust collector 11, and an eighth air outlet of the reverse suction fan 12 is connected with the bag-type dust collector 11 and used for guiding the drying medium discharged by the bag-type dust collector 11 into the bag-type dust collector 11 again for dust collection.

In the present embodiment, the heat exchanger 1 is a steam heat exchanger.

In the present embodiment, the drying main machine 2 is a rotary boiling drying main machine.

In the embodiment, the spiral feeder 6 adopts a flat spiral auger.

The working principle of the closed cycle drying apparatus described in this embodiment is as follows:

the method comprises the steps of directly feeding a required drying material into a positive pressure bin 7, feeding the wet material into a drying main machine 2 by a spiral feeding machine 6, directly contacting the wet material with hot inert gas (obtained by heating through a heat exchanger 1) in the drying main machine 2, rapidly drying the wet material (the rapid drying refers to drying can be completed within one to two seconds), crushing the dried material by a crusher 3 arranged in a drying tower 4, classifying by a classifier 5 arranged in the drying tower 4 to meet the fineness requirement (the fineness requirement is generally 325 and 500 meshes), centrifugally separating the dried and classified material by a cyclone separator 8 along with the inert gas, discharging the dry material by a blowing-off fan arranged at a second discharge port, dedusting the gas subjected to cyclone separation by a bag-type dust collector 11, and collecting and conveying the material discharged by the cyclone separator 8 and the bag-type dust collector 11 to a dry material bin 9 by a collecting auger 10. Then the inert gas after passing through the bag-type dust collector 11 is condensed by a condenser 13 to remove gasified water in the inert gas, the condensed inert gas is demisted and dehumidified by a demister 15, the condensed water is discharged into a condensation storage tank 14 through a drain pipe, the condensed demisted inert gas is introduced into the heat exchanger 1 again under the action of an induced draft fan 16 for heating, and then the condensed demisted inert gas enters the drying main machine 2 for recycling.

When the content of the materials in the inert gas discharged by the bag-type dust collector 11 exceeds a set index, the back suction fan 12 can be started, and the inert gas discharged by the bag-type dust collector 11 is introduced into the bag-type dust collector 11 again for dust collection.

The foregoing is only a preferred form of the invention and it should be noted that several similar variations and modifications could be made by one skilled in the art without departing from the inventive concept and these should also be considered within the scope of the invention.