CN210969537U

CN210969537U - Pre-crystallization device for polyester chips

Info

Publication number: CN210969537U
Application number: CN201921558989.2U
Authority: CN
Inventors: 蔡青高; 张勇; 陈志伟
Original assignee: Oerlikon Barmag Huitong Yangzhou Engineering Co Ltd
Current assignee: Oerlikon Barmag Huitong Yangzhou Engineering Co Ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-07-10
Anticipated expiration: 2029-09-19

Abstract

The utility model relates to a pre-crystallization device of polyester slices, which comprises a raw material bin and a pre-crystallizer, wherein the inner cavity of the cylinder body of the pre-crystallizer is provided with a stirring screw which is arranged on a rotor shaft, two ends of the rotor shaft are supported on a front end plate and a rear end plate through bearings, the periphery of the cylinder body is coated with a heating jacket, the lower part of the heating jacket is provided with a heat medium inlet, and the top of the heating jacket is provided with a heat medium outlet; a feed inlet is arranged at the circumferential top of the cylinder body close to the front end plate and is connected with an outlet of the raw material bin through a rotary regulating valve; the rear end plate is provided with a discharge port, and the axis of the discharge port is positioned on one side of the axis of the rotor shaft and in the same horizontal plane; the front end plate is provided with a hot air inlet, the center line of the hot air inlet is higher than the axis of the rotor shaft and is connected with an air inlet pipe which is bent upwards, the middle section of the air inlet pipe is provided with an air heater, and the upper end opening of the air inlet pipe is connected with the outlet of the air blower. The pre-crystallization device has the advantages of small volume, high yield, low operation cost and uniform heating of slices.

Description

Pre-crystallization device for polyester chips

Technical Field

The utility model relates to a sliced crystallization device in advance of polyester belongs to chemical industry equipment technical field.

Background

The polyester feedstock produced by polymerization is typically processed into flake-like particles of about 4 x 5 x 2 mm, commonly referred to as polyester chips. The proportion of crystalline domains in the polymer is expressed in terms of crystallinity, which varies widely, generally from 30% to 80%. After the polyester chips are pretreated, the polyester chips are extruded by a screw to be melted, and then the polyester chips are sprayed out of spinneret orifices of a spinneret plate and cooled to obtain the polyester fibers.

The important content of the pretreatment of the polyester chip is pre-crystallization, and the chip with certain crystallinity is obtained by heating and raising the temperature, so that the spinning suitability of the chip is improved, and the spinning process requirement is met.

Conventionally, polyester chips are heated by a fluidized bed and fluidized by hot air blowing. The volume of the equipment is large, the occupied area is large, the operation cost is high, and the slices are unevenly heated and are easy to bond.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a sliced pre-crystallization device of polyester, it is small, output is high, and the running cost is low, and sliced heating is even.

In order to solve the technical problem, the utility model discloses a pre-crystallization device of polyester chip, including raw materials feed bin and pre-crystallizer, the pre-crystallizer includes the horizontal barrel of axis, the inner chamber of barrel is equipped with the stirring screw who shares the axis with the barrel, the stirring screw is installed on the rotor shaft, the both ends of rotor shaft are supported on front end plate and rear end plate through the bearing, the periphery cladding of barrel has the heating jacket, the lower part of heating jacket is equipped with the jacket heat medium import, the top of heating jacket is equipped with the jacket heat medium export; a feed inlet is formed in the circumferential top of the cylinder body close to the front end plate and is connected with an outlet of the raw material bin through a rotary regulating valve; the rear end plate is provided with a discharge hole, and the axis of the discharge hole is positioned on one side of the axis of the rotor shaft and is positioned in the same horizontal plane with the axis of the rotor shaft; the front end plate is provided with a hot air inlet, the central line of the hot air inlet is higher than the axis of the rotor shaft and is connected with an air inlet pipe which is bent upwards, the middle section of the air inlet pipe is provided with an air heater, and the upper port of the air inlet pipe is connected with the outlet of an air blower.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: polyester chip raw materials in the raw material bin are discharged by a rotary adjusting valve and enter an inner cavity of the pre-crystallizer from a feeding hole, and the rotary adjusting valve controls the feeding amount and the material level in the pre-crystallizer; the rotor shaft drives the stirring screw to rotate, the polyester chip is stirred while being pushed to move backwards, the high-temperature heat medium enters the inner cavity of the heating jacket from the jacket heat medium inlet, the polyester chip is heated through the cylinder wall, and the heat medium after heat release flows out from the jacket heat medium outlet. The temperature of the polyester chips rises to complete partial pre-crystallization, and the chips are continuously turned and conveyed by the stirring screw, so that the polyester chips can be prevented from being bonded. Air blown out by the blower is heated by the air heater and then is blown into the inner cavity of the cylinder from the hot air inlet of the feeding end, on one hand, the air has the auxiliary heating effect on polyester chips, on the other hand, dust and small molecular components generated in the pre-crystallization process are blown to the discharging end and are discharged from the discharging port on the rear end plate along with materials. Small molecular components are blown off in time, which is favorable for the smooth pre-crystallization of the polyester chips; the discharge port is positioned in the middle of the height direction of the rear end plate, so that higher material quantity can be kept in the cylinder, and the crystallinity of discharged polyester chips is more stable and uniform.

As the utility model discloses an improvement, the discharge gate is connected with downwardly extending's ejection of compact standpipe of pre-crystallization, and the upper portion of ejection of compact standpipe of pre-crystallization links to each other with the demineralized water inlet tube through the Y shape tee bend, the lower extreme of ejection of compact standpipe of pre-crystallization links to each other with the entry of desiccator, the export of desiccator passes through the entry that soft joint and shale shaker and links to each other, the undersize thing export of shale shaker links to each other with the finished product feed bin, the bottom outlet of desiccator links to each other with the demineralized water outlet pipe, the top gas vent of desiccator links to each other with the entry of draught fan, the export of draught. The dryer and the pre-crystallizer have larger height difference, the pre-crystallized polyester chips enter the pre-crystallization discharge vertical pipe from the discharge hole, and the desalted water flowing out of the desalted water inlet pipe enters the pre-crystallization discharge vertical pipe from top to bottom, so that the polyester chips are washed and cooled while the downward flow of the polyester chips is facilitated. Then the polyester slices enter a dryer for drying, the polyester slices flow upwards while being dehydrated and dried under the action of the suction force of a top induced draft fan and the centrifugal force of the dryer, and the separated desalted water flows out through a desalted water outlet pipe after being discharged from a water outlet at the bottom of the dryer; and (4) screening the dried polyester slices by using a vibrating screen, and storing screened undersize products in a finished product bin.

As a further improvement, the front end of the rotor shaft is connected with the output end of the stirring speed reducer, the input end of the stirring speed reducer is driven by the stirring motor, and the rear end of the stirring speed reducer is fixed on the front end plate through the hollow round support. Stirring motor passes through stirring speed reducer drive rotor shaft and rotates, and the rotor shaft drives stirring screw and rotates, and stirring screw stirs polyester chip while, carries out the propelling movement.

As the utility model discloses a further improvement, the heating jacket is separated along the axial and is held the cover heating chamber for several mutually independent, and each presss from both sides the cover heating chamber and is equipped with respectively and presss from both sides the cover heat medium import and presss from both sides the cover heat medium export, and each presss from both sides the cover heat medium import and links to each other with the heat medium supply pipe through heat medium import valve respectively, and each presss from both sides the cover heat medium export and links to each other with the heat medium back flow through the heat medium outlet valve respectively. The heating jacket is axially divided into a plurality of jacket heating cavities, the heat medium flowing out of the heat medium supply pipe enters each jacket heating cavity through the heat medium inlet valve in a parallel connection mode, and flows out of each jacket heating cavity and then flows into the heat medium return pipe through the heat medium outlet valve to flow out, so that the heating intensity of the barrel body along the axial direction is more uniform, and the temperature difference of the heat medium in the head section and the tail section is avoided.

As a further improvement, the lower part of the front end plate is provided with a detachable purging port, and the lower part of the rear end plate is provided with a detachable evacuation port. After each batch of polyester chips is processed, the blowing port and the emptying port are opened, compressed air can be blown in from the blowing port, the chips at the bottom of the cylinder body are blown clean and discharged from the emptying port, and residues in the equipment are avoided.

As a further improvement of the utility model, the upper portions of the front end plate and the rear end plate are respectively provided with a detachable inspection door.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

FIG. 1 is a flow chart of a pre-crystallization device for polyester chips according to the present invention.

Fig. 2 is a front view of the pre-crystallizer of fig. 1.

Fig. 3 is a top view of fig. 2 with the rotary damper, blower and air inlet duct removed.

Fig. 4 is a view taken along direction a of fig. 2.

Fig. 5 is a view from direction B of fig. 2.

In the figure: 1. a raw material bin; 2. a rotary regulating valve; 3. a pre-crystallizer; 3a. a rotor shaft; 3b, a feed inlet; 3c, discharging holes; 3d, a hot air inlet; 3e, heating a jacket; 3e1. jacket heating medium inlet; 3e2. jacket heating medium outlet; 3f, stirring a speed reducer; 3g, a stirring motor; 3h, hollowing out the round support; 3j, a purge port; 3m, emptying; 3n. an inspection door; 4. a blower; 5. an air inlet pipe; 6. an air heater; 7. a dryer; 8. an induced draft fan; 9. a soft joint; 10. vibrating screen; 11. a finished product bin; v1, a heating medium inlet valve; v2. a heating medium outlet valve; G1. a heat medium supply pipe; G2. a heat medium return pipe; G3. pre-crystallizing a discharge vertical pipe; G4. a demineralized water inlet pipe; G5. and a demineralized water outlet pipe.

Detailed Description

As shown in fig. 1 to 5, the pre-crystallization device for polyester chip of the present invention comprises a raw material bin 1, a pre-crystallizer 3, a dryer 7, a vibrating screen 10 and a finished product bin 11. The pre-crystallizer 3 comprises a cylinder body with a horizontal axis, a stirring screw coaxial with the cylinder body is arranged in an inner cavity of the cylinder body, the stirring screw is installed on a rotor shaft 3a, two ends of the rotor shaft 3a are supported on a front end plate and a rear end plate through bearings, a heating jacket 3e is coated on the periphery of the cylinder body, a jacket heat medium inlet 3e1 is arranged at the lower part of the heating jacket 3e, and a jacket heat medium outlet 3e2 is arranged at the top of the heating jacket 3 e; a feed inlet 3b is formed in the circumferential top of the cylinder body close to the front end plate, and the feed inlet 3b is connected with an outlet of the raw material bin 1 through a rotary regulating valve 2; a discharge port 3c is arranged on the rear end plate, and the axis of the discharge port 3c is positioned on one side of the axis of the rotor shaft 3a and is positioned in the same horizontal plane with the axis of the rotor shaft; the front end plate is provided with a hot air inlet 3d, the central line of the hot air inlet 3d is higher than the axis of the rotor shaft and is connected with an air inlet pipe 5 which is bent upwards, the middle section of the air inlet pipe 5 is provided with an air heater 6, and the upper port of the air inlet pipe 5 is connected with the outlet of the air blower 4. The upper parts of the front end plate and the rear end plate are respectively provided with a detachable inspection door 3n.

Polyester chip raw materials in the raw material bin 1 are discharged by a rotary adjusting valve 2 and enter an inner cavity of a pre-crystallizer 3 from a feeding hole 3b, and the rotary adjusting valve 2 controls feeding amount and material level in the pre-crystallizer 3; the rotor shaft 3a drives the stirring screw to rotate, the polyester chips are stirred and pushed to move backwards, the high-temperature heat medium enters an inner cavity of the heating jacket 3e from the jacket heat medium inlet 3e1, the polyester chips are heated through the cylinder wall, and the heat medium after heat release flows out from the jacket heat medium outlet 3e2. The temperature of the polyester chips rises to complete partial pre-crystallization, and the chips are continuously turned and conveyed by the stirring screw, so that the polyester chips can be prevented from being bonded. Air blown out by the air blower 4 is heated by the air heater 6 and then blown into the inner cavity of the cylinder body from the hot air inlet 3d at the feeding end, on one hand, the air has the auxiliary heating effect on polyester chips, on the other hand, dust and micromolecule components generated in the pre-crystallization process are blown to the discharging end and are discharged from the discharging port 3c on the rear end plate along with the materials. Small molecular components are blown off in time, which is favorable for the smooth pre-crystallization of the polyester chips; the discharge port 3c is positioned in the middle of the height direction of the rear end plate, so that higher material quantity can be kept in the cylinder, and the crystallinity of discharged polyester chips is more stable and uniform.

The discharge gate 3c of crystallizer 3 in advance is connected with downwardly extending's ejection of compact standpipe G3 in advance, the upper portion of ejection of compact standpipe G3 in advance links to each other with demineralized water inlet tube G4 through Y shape tee bend, the lower extreme of ejection of compact standpipe G3 in advance links to each other with the entry of desiccator 7, the export of desiccator 7 links to each other with the entry of shale shaker 10 through soft joint 9, the screen underflow export of shale shaker 10 links to each other with finished product feed bin 11, the bottom outlet of desiccator 7 links to each other with demineralized water outlet pipe G5, the top gas vent of desiccator 7 links to each other with the entry of draught fan 8, the export of draught fan 8 communicates with each other with the atmosphere. The drier 7 and the pre-crystallizer 3 have a larger height difference, the pre-crystallized polyester chips enter the pre-crystallization discharge vertical pipe G3 from the discharge port 3c, and the desalted water flowing out of the desalted water inlet pipe G4 enters the pre-crystallization discharge vertical pipe G3 from top to bottom, so that the polyester chips are washed and cooled while flowing downwards. Then the polyester slices enter a dryer 7 for drying, the polyester slices flow upwards while realizing dehydration and drying under the action of the suction force of a top induced draft fan 8 and the centrifugal force of the dryer 7, and the separated desalted water flows out through a desalted water outlet pipe G5 after being discharged from a bottom water outlet of the dryer 7; and (3) screening the dried polyester slices by using a vibrating screen 10, and storing screened undersize products in a finished product bin 11.

The front end of the rotor shaft 3a is connected with the output end of the stirring speed reducer 3f, the input end of the stirring speed reducer 3f is driven by the stirring motor 3g, and the rear end of the stirring speed reducer 3f is fixed on the front end plate through the hollow round support 3h. Stirring motor 3g drives rotor shaft 3a through stirring speed reducer 3f and rotates, and rotor shaft 3a drives the stirring spiral and rotates, and the stirring spiral stirs polyester chip while carrying out the propelling movement.

The heating jacket 3e is divided into a plurality of mutually independent jacket heating cavities along the axial direction, each jacket heating cavity is respectively provided with a jacket heating medium inlet 3e1 and a jacket heating medium outlet 3e2, each jacket heating medium inlet 3e1 is respectively connected with a heating medium supply pipe G1 through a heating medium inlet valve V1, and each jacket heating medium outlet 3e2 is respectively connected with a heating medium return pipe G2 through a heating medium outlet valve V2. The heating jacket 3e is axially divided into a plurality of jacket heating cavities, the heat medium flowing out of the heat medium supply pipe G1 enters each jacket heating cavity through a heat medium inlet valve V1 in parallel connection, and after flowing out of each jacket heating cavity, the heat medium flows into a heat medium return pipe G2 through a heat medium outlet valve V2 to flow out, so that the heating intensity of the cylinder body along the axial direction is more uniform, and the temperature difference of the heat medium in the first section and the tail section is avoided being overlarge.

The lower part of the front end plate is provided with a detachable purging port 3j, and the lower part of the rear end plate is provided with a detachable emptying port 3m. After each batch of polyester chips is processed, the blowing port 3j and the emptying port 3m are opened, compressed air can be blown in from the blowing port 3j, the chips at the bottom of the cylinder body are blown clean, and the chips are discharged from the emptying port 3m, so that the residues in the equipment are avoided.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.

Claims

1. The utility model provides a polyester chip's crystallization device in advance, includes raw materials feed bin and crystallizer in advance, its characterized in that: the pre-crystallizer comprises a cylinder body with a horizontal axis, wherein a stirring screw coaxial with the cylinder body is arranged in an inner cavity of the cylinder body, the stirring screw is installed on a rotor shaft, two ends of the rotor shaft are supported on a front end plate and a rear end plate through bearings, a heating jacket is coated on the periphery of the cylinder body, a jacket heat medium inlet is formed in the lower part of the heating jacket, and a jacket heat medium outlet is formed in the top of the heating jacket; a feed inlet is formed in the circumferential top of the cylinder body close to the front end plate and is connected with an outlet of the raw material bin through a rotary regulating valve; the rear end plate is provided with a discharge hole, and the axis of the discharge hole is positioned on one side of the axis of the rotor shaft and is positioned in the same horizontal plane with the axis of the rotor shaft; the front end plate is provided with a hot air inlet, the central line of the hot air inlet is higher than the axis of the rotor shaft and is connected with an air inlet pipe which is bent upwards, the middle section of the air inlet pipe is provided with an air heater, and the upper port of the air inlet pipe is connected with the outlet of an air blower.

2. The apparatus for pre-crystallizing polyester chips as defined in claim 1, wherein: the discharge gate is connected with downwardly extending's ejection of compact standpipe of pre-crystallization, and the upper portion of ejection of compact standpipe of pre-crystallization links to each other with the demineralized water inlet tube through Y shape tee bend, the lower extreme of ejection of compact standpipe of pre-crystallization links to each other with the entry of desiccator, the export of desiccator passes through the entry of soft joint and shale shaker and links to each other, the undersize thing export of shale shaker links to each other with the finished product feed bin, the bottom outlet of desiccator links to each other with the demineralized water outlet pipe, the top gas vent of desiccator links to each other with the entry of draught fan, the export of draught fan communicates.

3. The apparatus for pre-crystallizing polyester chips as defined in claim 1, wherein: the front end of the rotor shaft is connected with the output end of the stirring speed reducer, the input end of the stirring speed reducer is driven by a stirring motor, and the rear end of the stirring speed reducer is fixed on the front end plate through a hollow round support.

4. The apparatus for pre-crystallizing polyester chips as defined in claim 1, wherein: the heating jacket is divided into a plurality of jacket heating cavities which are mutually independent along the axial direction, each jacket heating cavity is respectively provided with a jacket heating medium inlet and a jacket heating medium outlet, each jacket heating medium inlet is respectively connected with a heating medium supply pipe through a heating medium inlet valve, and each jacket heating medium outlet is respectively connected with a heating medium return pipe through a heating medium outlet valve.

5. The apparatus for pre-crystallizing polyester chips as defined in claim 1, wherein: the lower part of the front end plate is provided with a detachable purging port, and the lower part of the rear end plate is provided with a detachable emptying port.

6. The apparatus for pre-crystallizing polyester chips as defined in any one of claims 1 to 5, wherein: and the upper parts of the front end plate and the rear end plate are respectively provided with a detachable inspection door.