Efficient nitrogen drying equipment for polyethylene

Abstract

The utility model relates to the technical field of polyethylene drying equipment, in particular to efficient polyethylene nitrogen drying equipment which comprises a drying cylinder, an electric heater is fixedly installed outside the drying cylinder, a conical cylinder is fixedly installed at the bottom end of the drying cylinder, and a nitrogen generator is arranged on one side of the drying cylinder. The gas outlet end of the nitrogen generator communicates with the conical barrel through a conveying pipe, a gas valve is fixedly installed on the conveying pipe, a nitrogen backflow device is arranged on the drying barrel and comprises a three-way pipe fixedly installed at the top of the drying barrel, and a three-way valve is fixedly installed on the three-way pipe. A return pipe is fixedly mounted at the tail end of the other pipe body of the three-way pipe, a fan is fixedly mounted on the inner wall of the return pipe, a moisture absorption barrel is fixedly mounted at the end of the return pipe, a molecular sieve is arranged in the moisture absorption barrel, and the moisture absorption barrel is communicated with the conical barrel through a return pipe. The nitrogen drying device is beneficial to drying operation and has the effect of recycling nitrogen.

Description

TECHNICAL FIELD

[0001] The utility model relates to polyethylene drying equipment technical field, specifically, relate to a kind of polyethylene high-efficiency nitrogen drying equipment. BACKGROUND

[0002] Polyethylene is widely used as a thermoplastic, often needs to be dried in the manufacturing process to remove moisture and volatile impurities on its surface, so as to improve the quality and performance of the product;Traditional drying equipment mostly uses air as drying medium, although it can play a certain drying effect, but because air contains oxygen, oxygen has oxidizing property, easy to cause polyethylene oxidation, affect normal drying.

[0003] In order to solve these problems, nitrogen drying equipment emerged as the times require, nitrogen as an inert gas, has high heat conduction performance, not easy to cause chemical reaction and other advantages, therefore is widely used in the drying process of polyethylene material, when using polyethylene high-efficiency nitrogen drying equipment for drying operation, traditional drying operation is generally through nitrogen generator to continuously deliver nitrogen, realize the flow of nitrogen to drive water vapor and other outward discharge, achieve the effect of drying, but continuous uninterrupted generation and delivery of nitrogen can cause large energy consumption, there is the defect that nitrogen cannot be recycled. In view of this, we provide a kind of polyethylene high-efficiency nitrogen drying equipment. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of polyethylene high-efficiency nitrogen drying equipment to solve the defect proposed in the above background art.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of polyethylene high-efficiency nitrogen drying equipment, including drying cylinder, the outside of the drying cylinder is fixedly installed with electric heater, the bottom end of the drying cylinder is fixedly installed with conical cylinder, one side of the drying cylinder is provided with nitrogen generator, the gas outlet of the nitrogen generator is connected with the conical cylinder by conveying pipe, gas valve is fixedly installed on the conveying pipe, nitrogen backflow device is arranged on the drying cylinder, the nitrogen backflow device includes three-way pipe fixedly installed on the top of the drying cylinder, three-way valve is fixedly installed on the three-way pipe, another pipe body end of the three-way pipe is fixedly installed with backflow pipe, fan is fixedly installed on the inner wall of the backflow pipe, the end of the backflow pipe is fixedly installed with moisture absorption cylinder, molecular sieve is arranged in the moisture absorption cylinder, the moisture absorption cylinder is connected with the conical cylinder by backfeed pipe.

[0007] Preferably, the inner wall of the conical cylinder is inclined downward by 45-60 degrees, the bottom end of the conical cylinder is fixedly installed with a discharge pipe, and the discharge pipe is fixedly installed with a discharge valve.

[0008] Preferably, the end of the conveying pipe and the return pipe near the conical cylinder is inclined downward by 45-60 degrees, and the return pipe is fixedly installed with a second valve.

[0009] Preferably, the remaining one of the three-way pipe is vertically upward, and the end of the return pipe is inserted into the moisture absorption cylinder near the bottom.

[0010] Preferably, the top of the drying cylinder is fixedly installed with a screw feeder, the feeding end of the screw feeder is fixedly installed with a feeding pipe, the discharging end of the screw feeder is communicated with the inside of the drying cylinder, and the feeding pipe is fixedly installed with a feeding valve.

[0011] Preferably, the top center of the drying cylinder is fixedly installed with a stirring motor, the output shaft of the stirring motor is fixedly installed with a stirring shaft, and the stirring shaft is fixedly installed with stirring blades in the drying cylinder.

[0012] Preferably, the bottom end of the moisture absorption cylinder is fixedly installed with a discharge hopper, the bottom end of the discharge hopper is fixedly installed with an exhaust pipe, and the exhaust pipe is fixedly installed with a first valve.

[0013] Preferably, the top of the moisture absorption cylinder is fixedly installed with a replenishment pipe, and the replenishment pipe is fixedly installed with a third valve.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] 1. The drying cylinder is provided, and the electric heater is used for heating, so that the drying operation is realized. The nitrogen backflow device is provided, and after all the air is discharged, the nitrogen is used to transport the water vapor to the moisture absorption cylinder for moisture absorption operation. The dried nitrogen can be continuously transported to the drying cylinder for use, so that the nitrogen can be recycled.

[0016] 2. The stirring motor and the stirring blades are provided, so that the stirring blades can be driven to rotate, the stirring operation is realized, the replenishment pipe and the exhaust pipe are provided, and the invalid molecular sieve can be replaced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0018] Figure 2 It is a schematic diagram of part of the structure of the present application.

[0019] Figure 3 It is the structure schematic view of the nitrogen backflow device of the utility model;

[0020] Figure 4 It is the partial structure schematic view of the nitrogen backflow device of the utility model;

[0021] The meaning of each reference numeral in the figure is as follows:

[0022] 1, drying cylinder; 10, screw feeder; 11, feeding pipe; 12, feeding valve; 13, conical cylinder; 14, discharge pipe; 141, discharge valve; 15, electric heater;

[0023] 2, nitrogen generator; 20, conveying pipe; 21, gas valve;

[0024] 3, stirring motor; 30, stirring shaft; 31, stirring blade;

[0025] 4, nitrogen backflow device; 40, tee; 401, tee valve; 41, backflow pipe; 411, fan; 42, moisture absorption cylinder; 43, discharge hopper; 431, exhaust pipe; 432, first valve; 44, molecular sieve; 45, backflow pipe; 451, second valve; 46, supplementary pipe; 461, third valve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a kind of polyethylene efficient nitrogen drying equipment, including drying cylinder 1, the outside of drying cylinder 1 is fixedly installed with electric heater 15, electric heater 15 is temperature control type electric heater, temperature can be controlled, and temperature control type electric heater is existing conventional technology, here no longer elaborates;

[0028] Specifically, the bottom end of drying cylinder 1 is fixedly installed with conical cylinder 13, one side of drying cylinder 1 is provided with nitrogen generator 2, the gas outlet end of nitrogen generator 2 is connected with conical cylinder 13 by conveying pipe 20, realizes conveying nitrogen and carries out air circulation operation;Conveying pipe 20 is fixedly installed with gas valve 21;

[0029] Specifically, as Figure 1 , Figure 2 and Figure 3As shown, the drying cylinder 1 is provided with a nitrogen backflow device 4, which includes a tee pipe 40 fixedly installed on the top of the drying cylinder 1, a tee valve 401 fixedly installed on the tee pipe 40, a backflow pipe 41 fixedly installed on the other end of the tee pipe 40, a fan 411 fixedly installed on the inner wall of the backflow pipe 41, a moisture absorption cylinder 42 fixedly installed on the end of the backflow pipe 41, and a molecular sieve 44 arranged in the moisture absorption cylinder 42. The end of the backflow pipe 41 is inserted into the moisture absorption cylinder 42 near the bottom position to realize moisture absorption by the molecular sieve 44. The moisture absorption cylinder 42 and the conical cylinder 13 are connected through a backflow pipe 45, and a second valve 451 is fixedly installed on the backflow pipe 45, so that the dried nitrogen gas can continue to flow back to the drying cylinder 1 through the backflow pipe 45, achieving the effect of recycling nitrogen gas.

[0030] In this embodiment, the plane of the inner wall of the conical cylinder 13 is inclined downward by 45°-60°, and the bottom end of the conical cylinder 13 is fixedly installed with a discharge pipe 14, and the discharge valve 141 is fixedly installed on the discharge pipe 14, so that the discharge valve 141 can be opened for discharging operation.

[0031] Specifically, the end of the conveying pipe 20 and the backflow pipe 45 near the side of the conical cylinder 13 is inclined downward by 45°-60°, so that the polyethylene to be dried is not easily accumulated in the conveying pipe 20 and the backflow pipe 45.

[0032] Further, the remaining one pipe of the tee pipe 40 is vertically upward, so that after the nitrogen gas is introduced into the drying cylinder 1, the air in the drying cylinder 1 can be discharged outward from the top of the tee pipe 40.

[0033] In addition, the top of the drying cylinder 1 is fixedly installed with a screw feeder 10, the feeding end of the screw feeder 10 is fixedly installed with a feeding pipe 11, the discharging end of the screw feeder 10 is connected with the inside of the drying cylinder 1, and the feeding valve 12 is fixedly installed on the feeding pipe 11, so as to realize the feeding operation by the screw feeder 10.

[0034] It is worth noting that the top center of the drying cylinder 1 is fixedly installed with a stirring motor 3, the output shaft of the stirring motor 3 is fixedly installed with a stirring shaft 30, and the stirring blade 31 is fixedly installed on the stirring shaft 30, which is located in the drying cylinder 1 to realize the stirring operation.

[0035] It is worth noting that the bottom end of the moisture absorption cylinder 42 is fixedly installed with a discharge hopper 43, the bottom end of the discharge hopper 43 is fixedly installed with an outer discharge pipe 431, the outer discharge pipe 431 is fixedly installed with a first valve 432, the top of the moisture absorption cylinder 42 is fixedly installed with a replenishment pipe 46, the replenishment pipe 46 is fixedly installed with a third valve 461, so that the invalid molecular sieve 44 can be discharged from the outer discharge pipe 431 and new molecular sieve 44 can be added from the replenishment pipe 46.

[0036] The polyethylene efficient nitrogen drying equipment of the utility model in use, utilize spiral feeder 10 to convey material to drying cylinder 1, at this moment, start nitrogen generator 2 and make it work, nitrogen generator 2 works, realize conveying nitrogen to drying cylinder 1, with nitrogen into drying cylinder 1, can realize the air in drying cylinder 1 from the top of three-way pipe 40 to the outside, make drying cylinder 1 in nitrogen environment, after air discharge, rotate three-way valve 401 to drying cylinder 1 and moisture absorption cylinder 42 are communicated, with drying cylinder 1 and moisture absorption cylinder 42 in storage have appropriate nitrogen, stop starting nitrogen generator 2, at this moment, start electric heater 15 and heat operation, start stirring motor 3 and make it work, stirring motor 3 works, drive stirring shaft 30 and stirring blade 31 rotation, realize stirring operation;

[0037] In the drying process, start fan 411, at this moment, fan 411 can drive nitrogen flow, make the nitrogen and water vapor in drying cylinder 1 enter molecular sieve 44 site and carry out moisture absorption operation, after moisture absorption, nitrogen continues to flow back to drying cylinder 1 along backflow pipe 45, realize the recycling operation of nitrogen;After drying, open discharge valve 141 and carry out discharge operation.

[0038] The basic principle, main features and advantages of the utility model are shown and described above.The skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the utility model and do not limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A polyethylene high-efficiency nitrogen drying device comprising a drying cylinder (1), characterized in that: The outer part of the drying cylinder (1) is fixedly installed with an electric heater (15), the bottom end of the drying cylinder (1) is fixedly installed with a conical cylinder (13), one side of the drying cylinder (1) is provided with a nitrogen generator (2), the outlet end of the nitrogen generator (2) is connected with the conical cylinder (13) through a conveying pipe (20), the conveying pipe (20) is fixedly installed with a gas valve (21), the drying cylinder (1) is provided with a nitrogen backflow device (4), the nitrogen backflow device (4) comprises a tee pipe (40) fixedly installed at the top of the drying cylinder (1), the tee pipe (40) is fixedly installed with a tee valve (401), the other pipe body end of the tee pipe (40) is fixedly installed with a backflow pipe (41), the inner wall of the backflow pipe (41) is fixedly installed with a fan (411), the end of the backflow pipe (41) is fixedly installed with a moisture absorption cylinder (42), the moisture absorption cylinder (42) is provided with molecular sieve (44), the moisture absorption cylinder (42) and the conical cylinder (13) are connected through a back feeding pipe (45).

2. The polyethylene high-efficiency nitrogen drying equipment according to claim 1, characterized in that: The plane where the inner wall of the conical cylinder (13) is located is arranged to be inclined downward by 45-60 degrees, the bottom end of the conical cylinder (13) is fixedly installed with a discharging pipe (14), the discharging pipe (14) is fixedly installed with a discharging valve (141).

3. The polyethylene high-efficiency nitrogen drying device according to claim 1, characterized in that: The end pipe body of the conveying pipe (20) and the back feeding pipe (45) near the conical cylinder (13) is arranged to be inclined downward by 45-60 degrees, the back feeding pipe (45) is fixedly installed with a second valve (451).

4. The polyethylene high-efficiency nitrogen drying device according to claim 1, characterized in that: The remaining one pipe body of the tee pipe (40) is arranged to be vertical upward, the end pipe body of the backflow pipe (41) is inserted into the moisture absorption cylinder (42) near the bottom position.

5. The polyethylene high-efficiency nitrogen drying apparatus according to claim 1, characterized in that: The top cylinder body of the drying cylinder (1) is fixedly installed with a spiral feeder (10), the feeding end of the spiral feeder (10) is fixedly installed with a feeding pipe (11), the discharging end of the spiral feeder (10) is connected with the inside of the drying cylinder (1), the feeding pipe (11) is fixedly installed with a feeding valve (12).

6. The polyethylene high-efficiency nitrogen drying apparatus according to claim 1, characterized in that: The top center position of the drying cylinder (1) is fixedly installed with a stirring motor (3), the output shaft end of the stirring motor (3) is fixedly installed with a stirring shaft (30), the stirring shaft (30) is fixedly installed with stirring blades (31), the stirring blades (31) are located in the drying cylinder (1).

7. The polyethylene high-efficiency nitrogen drying apparatus according to claim 1, characterized in that: The bottom end of the moisture absorption cylinder (42) is fixedly installed with a discharging hopper (43), the bottom end of the discharging hopper (43) is fixedly installed with an external discharge pipe (431), the external discharge pipe (431) is fixedly installed with a first valve (432).

8. The polyethylene high-efficiency nitrogen drying apparatus according to claim 1, characterized in that: The top of the moisture absorption cylinder (42) is fixedly installed with a supplement pipe (46), the supplement pipe (46) is fixedly installed with a third valve (461).

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