CN201974013U

CN201974013U - PET (Polyethylene Terephthalate) bottle-flake hot-air circulating and continuous-drying system

Info

Publication number: CN201974013U
Application number: CN 201120055123
Authority: CN
Inventors: 杜芳; 杜红立
Original assignee: Ningbo Dafa Chemical Fiber Co Ltd
Current assignee: Ningbo Dafa Chemical Fiber Co Ltd
Priority date: 2011-03-04
Filing date: 2011-03-04
Publication date: 2011-09-14
Anticipated expiration: 2021-03-04

Abstract

The utility model relates to a recovery processing system of waste plastic bottle flakes, in particular to a PET (Polyethylene Terephthalate) bottle-flake hot-air circulating and continuous-drying system. The PET bottle-flake hot-air circulating and continuous-drying system comprises three drying systems; each stage of drying system comprises a cyclone separator, a heat-preserving hopper, a high-pressure fan and a discharging pipeline, wherein a discharging opening of the cyclone separator is communicated with a feeding opening of the heat-preserving hopper, a discharging opening of the heat-preserving hopper is led to the discharging pipeline, one end of the discharging pipeline is connected with an air outlet of the high-pressure fan, and the other end of the discharging pipeline is communicated with a feeding opening of the cyclone separator of the next stage of drying system; the air inlets of the three high-pressure fans are communicated with an air outlet of a hot-air supplying system; an exhaust opening of a first-stage cyclone separator is led to the atmosphere; and the exhaust openings of a second-stage cyclone separator and a third-stage cyclone separator are communicated with an air inlet of the hot-air supplying system after passing through a filter. The utilized hot air is circularly utilized after being filtered through the filter, the energy consumption is reduced, and the air pollution is avoided.

Description

A kind of PET bottle sheet hot air circulation continuous drying system

Technical field

The utility model relates to a kind of recovery and processing system of waste plastic bottle sheet, relates in particular to a kind of PET bottle sheet hot air circulation continuous drying system.

Background technology

Recycle in the industry at PET bottle sheet, the bottle sheet needs to carry out predrying after cleaning, the predrying technology of existing P ET bottle sheet, and what generally adopt is rotary-drum vacuum seasoning and hot blast continuous drying method.In hot blast continuous drying technology, traditional method is with air exhauster air to be pumped to heater, by heater with air heat to the purpose temperature, deliver to drying device again and the bottle sheet is carried out drying handle, the hot-air after having utilized is discharged into atmosphere through air-introduced machine.

There are two aspect defectives in this continuous drying mode: the one, have a large amount of undesirable substances such as dust in the hot-air that has utilized, and directly be discharged in the air, cause thermal waste also to pollute air ambient simultaneously; The 2nd, direct extracting air heating, the heat of consumption is huge, is unfavorable for energy-saving and emission-reduction.

The utility model content

The utility model provides a kind of PET bottle sheet hot air circulation continuous drying system, can recycle the hot-air of discharge, and is recycling, avoided air pollution when cutting down the consumption of energy.In order to realize the foregoing invention purpose, the utility model has adopted following technological means:

A kind of PET bottle sheet hot air circulation continuous drying system comprises one-level drying system, secondary drying system and three-stage drying system; Described one-level drying system comprises primary cyclone, one-level insulation hopper, one-level high pressure positive blower and one-level discharge pipe, described secondary drying system comprises secondary cyclone, secondary insulation hopper, secondary high pressure positive blower and secondary discharge pipe, and described three-stage drying system comprises three-stage cyclone separator, three grades of insulation hoppers, three grades of high pressure positive blowers and three grades of discharge pipes; The charging aperture of the discharging opening of cyclone separator at the same level and insulation hopper is connected, and the discharging opening of insulation hopper leads to discharge pipe, and an end of discharge pipe connects the air outlet of high pressure positive blower, and the other end is communicated with the charging aperture of next stage drying system cyclone separator; The air inlet of three high pressure positive blowers is communicated with the air outlet of hot blast feeding system; The exhaust outlet of primary cyclone leads to atmosphere; The exhaust outlet of secondary cyclone and three-stage cyclone separator is through being communicated with the air inlet of hot blast feeding system behind the filter.

All be provided with the stirring auger in described one-level discharge pipe, secondary discharge pipe and three grades of discharge pipes;

Described hot blast feeding system comprises heater and air exhauster; The air outlet of described air exhauster is communicated with the air inlet of heater; The exhaust outlet of described secondary cyclone and three-stage cyclone separator is through leading to the air inlet of air exhauster behind the filter;

Be communicated with an air preheater that is installed in the boiler flue on the air inlet of described air exhauster, the air inlet of described air preheater leads to atmosphere.

The beneficial effects of the utility model are: deliver to the air inlet of air exhauster after two, the intact hot-air of three-stage drying system utilization filters through filter, make and the hot air circulate utilization reduced energy consumption, but also avoided air pollution; The air that air exhauster extracts is through preheating, and pre-heater is arranged in the boiler flue, has further reduced energy consumption.

Description of drawings

Fig. 1 is the structural representation of a kind of PET bottle of the utility model sheet hot air circulation continuous drying system.

The specific embodiment

Below in conjunction with accompanying drawing, the preferred implementation of a kind of PET bottle of the utility model sheet hot air circulation continuous drying system is made detailed description:

As shown in Figure 1, native system is made up of one-level drying system, secondary drying system, three-stage drying system and hot blast feeding system.The one-level drying system comprises primary cyclone 11, one-level insulation hopper 12, one-level high pressure positive blower 13 and one-level discharge pipe 14; Primary cyclone 11 is positioned at the top of one-level insulation hopper 12, and the charging aperture of its discharging opening and one-level insulation hopper 12 is communicated with; One-level insulation hopper 12 is positioned at the top of one-level discharge pipe 14, and one-level discharge pipe 14 is horizontally disposed with, and the wall of the discharging opening break-through one-level discharge pipe 14 of one-level insulation hopper 12 is connected the two; The left part of one-level discharge pipe 14 connects the air outlet of one-level high pressure positive blower 13.

The secondary drying system comprises secondary cyclone 21, secondary insulation hopper 22, secondary high pressure positive blower 23 and secondary discharge pipe 24; The three-stage drying system comprises three-stage cyclone separator 31, three grades of insulation hoppers 32, three grades of high pressure positive blowers 33 and three grades of discharge pipes 34; Two, the mounting means of three-stage drying system and one-level drying system are identical.

When three drying systems were assembled mutually, the right part of one-level discharge pipe 14 was communicated with the charging aperture of secondary cyclone 21, and the right part of secondary discharge pipe 24 is communicated with the charging aperture of three-stage cyclone separator 31; All be provided with the stirring auger in one-level discharge pipe 14, secondary discharge pipe 24 and three grades of discharge pipes 34.

The hot blast feeding system comprises heater 2 and air exhauster 3, and the air inlet of the air outlet of air exhauster 3 and heater 2 is communicated with, and the air outlet of heater 2 is communicated with the air inlet of one-level high pressure positive blower 13, secondary high pressure positive blower 23 and three grades of high pressure positive blowers 33 respectively; The exhaust outlet of primary cyclone 11 leads to atmosphere through behind the filter 1, and the exhaust outlet of secondary cyclone 21 and three-stage cyclone separator 31 is communicated with the air inlet of air exhauster 3 through filter 1 back; Connect an air preheater 4 on the air inlet of air exhauster 3, air preheater 4 is installed in the flue of boiler, has utilized the waste heat of boiler like this, has reduced energy consumption, and the air inlet of air preheater 4 leads to atmosphere.

In the time of native system work, the PET bottle sheet that has cleaned is sent into from the charging aperture of primary cyclone 11, effect through primary cyclone 11, isolated steam and dust etc., discharge from exhaust outlet, being filtered device 1 filters out, cleaned air is arranged to atmosphere, moist bottle sheet enters into one-level insulation hopper 12, an assurance bottle sheet was not lowered the temperature before heat drying, bottle sheet in the one-level insulation hopper 12 falls into one-level discharge pipe 14 from discharging opening, simultaneously, be evacuated to heating in the heater 2 through the air of air preheater 4 preheatings by air exhauster 3, heater via 2 is heated to the hot-air of purpose temperature and delivers to one-level high pressure positive blower 13 through pipeline, compression through one-level high pressure positive blower 13, Hot air quilt quickens to blow into one-level discharge pipe 14, and in the heating of hot-air with stir under the stirring of auger, the moisture that the bottle sheet carries is heated evaporation, bottle sheet and steam etc. move right under the promotion of hot-air to secondary cyclone 21, repeat to begin the heat drying of a new round again.The mode of operation of secondary drying system and three-stage drying system is the same substantially with the one-level drying system, its difference is that secondary cyclone 21 and three-stage cyclone separator 31 isolated steam and dust etc. are filtered device 1 and filter out, clean hot-air is sent back to the air inlet of air exhauster 3 again, recycling has reduced the power consumption of producing.Through behind three heat dryings, PET bottle sheet is fully dry, finishes discharging from three grades of discharge pipes 34 at last.

Claims

1. a PET bottle sheet hot air circulation continuous drying system comprises one-level drying system, secondary drying system and three-stage drying system; Described one-level drying system comprises primary cyclone (11), one-level insulation hopper (12), one-level high pressure positive blower (13) and one-level discharge pipe (14), described secondary drying system comprises secondary cyclone (21), secondary insulation hopper (22), secondary high pressure positive blower (23) and secondary discharge pipe (24), and described three-stage drying system comprises three-stage cyclone separator (31), three grades of insulation hoppers (32), three grades of high pressure positive blowers (33) and three grades of discharge pipes (34); The charging aperture of the discharging opening of cyclone separator at the same level and insulation hopper is connected, and the discharging opening of insulation hopper leads to discharge pipe, and an end of discharge pipe connects the air outlet of high pressure positive blower, and the other end is communicated with the charging aperture of next stage drying system cyclone separator; The air inlet of three high pressure positive blowers is communicated with the air outlet of hot blast feeding system; It is characterized in that: the exhaust outlet of primary cyclone (11) leads to atmosphere; The exhaust outlet of secondary cyclone (21) and three-stage cyclone separator (31) is communicated with the air inlet of hot blast feeding system through filter (1) back.

2. a kind of PET bottle sheet hot air circulation continuous drying according to claim 1 system is characterized in that: all be provided with the stirring auger in described one-level discharge pipe (14), secondary discharge pipe (24) and the three grades of discharge pipes (34).

3. according to claim 1 or 2 each described a kind of PET bottle sheet hot air circulation continuous drying systems, it is characterized in that: described hot blast feeding system comprises heater (2) and air exhauster (3); The air outlet of described air exhauster (3) is communicated with the air inlet of heater (2); The air inlet that leads to air exhauster (3) behind the exhaust outlet process filter (1) of described secondary cyclone (21) and three-stage cyclone separator (31).

4. a kind of PET bottle sheet hot air circulation continuous drying according to claim 3 system, it is characterized in that: be communicated with an air preheater (4) that is installed in the boiler flue on the air inlet of described air exhauster (3), the air inlet of described air preheater (4) leads to atmosphere.