CN212974385U

CN212974385U - Anti-washing system of granulator demineralized water filter screen rotary drum

Info

Publication number: CN212974385U
Application number: CN202020587000.7U
Authority: CN
Inventors: 沈建伦; 范校华; 赵刚强
Original assignee: Tongkun Group Zhejiang Hengchao Chemical Fiber Co ltd
Current assignee: Tongkun Group Zhejiang Hengchao Chemical Fiber Co ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2021-04-16
Anticipated expiration: 2030-04-20

Abstract

The utility model discloses a reverse washing system for a rotary drum of a desalted water filter screen of a granulator, which comprises a filter box, wherein the filter screen rotary drum is arranged above the filter box, and an ultrafiltration net cylinder, a first water pump, a check valve and an underwater granulator are sequentially connected in series at the side of the filter box through a main pipeline; the liquid outlet end of the underwater granulator extends to the upper part of the filter screen rotary drum through a main pipeline; a spray head which is opposite to the surface of the filter screen rotary drum is arranged on the outer side of the filter screen rotary drum, the liquid inlet end of the spray head is connected with a switching mechanism, the switching mechanism is also respectively communicated with a first backwashing pipe and a second backwashing pipe, and the first backwashing pipe is communicated with a main pipeline from a check valve to an underwater granulator; the second backwash pipe is in communication with an external source of desalinated water. Through the utility model provides a switching mechanism has realized the nimble switching between demineralized water and the outside demineralized water in this system to the excessive and excessive extravagant phenomenon of overflow that leads to of demineralized water increase in having avoided current back flush system.

Description

Anti-washing system of granulator demineralized water filter screen rotary drum

Technical Field

The utility model relates to a chemical production equipment, especially a pelleter demineralized water filter screen rotary drum back flush system.

Background

In the chemical fiber industry, the pelleter is mainly used for slicing polyester, and the convenience of subsequent polyester processing can be effectively improved. However, in the slicing process of the polyester, some powder and impurities are attached to the surface of the polyester slice, and the powder on the surface of the polyester slice needs to be cleaned by desalted water. After cleaning, the desalted water with a large amount of powder needs to be filtered by a filter screen drum for convenient recycling. After the filter screen rotary drum is used for a long time, the surface of the filter screen rotary drum can be attached by a large amount of powder, and then the water permeability of the filter screen rotary drum is influenced. Therefore, the screen bowl requires a backwash of the surface with demineralized water. The existing backwashing operation mode is to reintroduce a path of desalted water outside the filter screen rotary drum to backwash the filter screen rotary drum. Although the mode is simple, the total amount of the desalted water used by backwashing is introduced from the outside, so that the total amount of the desalted water in the system is increased by a speed higher than the evaporation speed, and the desalted water overflows after exceeding the bearing capacity of the filter tank, and finally the waste of resources is caused.

SUMMERY OF THE UTILITY MODEL

In view of the above insufficiency, the utility model aims to provide a pelleter demineralized water filter screen rotary drum back flush system, can be in keeping the system in the case that the total amount of demineralized water is certain, the introduction of fresh demineralized water of furthest reduction.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a backwashing system for a rotary drum of a desalted water filter screen of a granulator comprises a filter box, wherein the filter screen rotary drum is arranged above the filter box, and an ultrafiltration net drum, a first water pump, a check valve and an underwater granulator are sequentially connected in series at the side of the filter box through a main pipeline; the liquid outlet end of the underwater granulator extends to the upper part of the filter screen rotary drum through a main pipeline; a spray head which is opposite to the surface of the filter screen rotary drum is arranged on the outer side of the filter screen rotary drum, the liquid inlet end of the spray head is connected with a switching mechanism, the switching mechanism is also respectively communicated with a first backwashing pipe and a second backwashing pipe, and the first backwashing pipe is communicated with a main pipeline from a check valve to an underwater granulator; the second backwash pipe is in communication with an external source of desalinated water.

Furthermore, the switching mechanism comprises a body, wherein a first liquid inlet pipe, a second liquid inlet pipe and a liquid outlet pipe are arranged on the body, the first liquid inlet pipe is connected with the first backwashing pipe, the second liquid inlet pipe is connected with the second backwashing pipe, and the liquid outlet pipe is connected with the spray head; a valve plate is arranged in the body in a turnover manner, a rotating shaft on the valve plate is arranged close to the intersection of the first liquid inlet pipe and the second liquid inlet pipe, two side surfaces of the valve plate are provided with inclined blocks, and the inclined blocks are gradually increased along the advancing direction of the desalted water; and a second water pump is also arranged on the second backwashing pipe.

Furthermore, a plurality of grooves are uniformly distributed on the inclined surface of the inclined block, and the grooves are arranged along the width direction of the inclined block.

Further, a hollow cavity is arranged inside the inclined block.

Furthermore, a sealing groove is formed in the end face of the inner portion of the first liquid inlet pipe and the end face of the inner portion of the second liquid inlet pipe, and a sealing strip is embedded in the sealing groove.

Furthermore, an overflow pipe is also arranged on the filter box.

The working principle is as follows: when the total amount of the demineralized water in the utility model is sufficient, the demineralized water for back washing the filter screen roller does not need to be introduced from the outside. At the moment, through the control of the switching mechanism, the demineralized water for backwashing the filter screen roller is introduced through the first backwashing pipe connected with the main pipe, the total amount of the demineralized water in the system is not increased, and the resource waste phenomenon that the demineralized water overflows from the filter tank can not occur. And when the total amount of the desalted water in the filter tank is reduced due to evaporation, the switching mechanism is reactivated to enable the spray head to be communicated with the second backwashing pipe, and the desalted water is introduced from the outside, and the desalted water introduced from the outside can supplement the reduced part.

Has the advantages that: the utility model discloses a switching mechanism has realized the nimble switching between demineralized water and the outside demineralized water in this system to the excessive and excessive extravagant phenomenon of overflow that leads to of demineralized water increase in having avoided current back flush system.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of a switching mechanism;

FIG. 3 is a state diagram of the present invention when the system is in use with the original demineralized water;

FIG. 4 is a state diagram of the present invention when external demineralized water is used;

FIG. 5 is a schematic structural view of the body;

fig. 6 is a schematic structural view of the valve plate.

Reference numerals: 1. the filter box 2, the filter screen rotating cylinder 3, the main pipeline 4, the ultrafiltration screen cylinder 5, the first water pump 6, the check valve 7, the underwater granulator 8, the spray head 9, the switching mechanism 901, the body 902, the first liquid inlet pipe 903, the second liquid inlet pipe 904, the liquid outlet pipe 905, the valve plate 906, the rotating shaft 907, the sloping block 908, the groove 909, the cavity 910, the sealing groove 911, the sealing strip 10, the first backwashing pipe 11, the second backwashing pipe 12, the second water pump 13 and the overflow pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-6, a back flushing system for a drum of a desalted water filter screen of a granulator comprises a filter box 1, wherein the filter box is used for collecting desalted water in a system, a drum 2 of the filter screen is arranged above the filter box, and the drum of the filter screen is used for filtering and cleaning a large amount of powder and impurities in desalted water after polyester chips are cut. The lower part of the filter box is connected with a main pipeline 3, and the liquid outlet end of the main pipeline extends to the upper part of the filter screen rotary drum. And an ultrafiltration net cylinder 4, a first water pump 5, a check valve 6 and an underwater pelletizer 7 are connected in series on the main pipeline in sequence along the advancing direction of the demineralized water in the main pipeline. The desalted water enters the underwater granulator from the main pipeline, then the cut polyester chips are cleaned, and then the powder on the surfaces of the polyester chips is taken away and discharged into a filter screen rotary drum for filtering. In order to prevent the filter holes of the strainer drum from being blocked, a spray head 8 facing the surface of the strainer drum is arranged outside the strainer drum, a switching mechanism 9 is connected to the liquid inlet end of the spray head, and a first backwash pipe 10 and a second backwash pipe 11 are connected to the switching mechanism. Wherein, the liquid inlet end of the first back flushing pipe is connected with the main pipeline 3 between the check valve 6 and the underwater granulator 7, the second back flushing pipe is communicated with an external desalted water source, and desalted water is sprayed onto the filter screen rotary drum through the spray head to realize back flushing.

In a specific embodiment, the switching mechanism can realize the communication switching between the spray head and the first backwashing pipe or the second backwashing pipe in various ways. However, most of the switching needs to be accomplished by a solenoid valve. The solenoid valve is compared in mechanical structure, and the reliability is lower relatively, and then has promoted the utility model discloses an uncertainty. And in order to promote the utility model discloses especially switching mechanism's reliability, switching mechanism 9 includes body 901, and the body is T type structure, goes up and establishes first feed liquor pipe 902, second feed liquor pipe 903 and drain pipe 904. first feed liquor pipe and first backwash pipe looks UNICOM, and second feed liquor pipe then and second backwash pipe looks UNICOM. And the liquid outlet pipe is connected with the spray head 8. In addition, still be provided with valve plate 905 in this body, the upper end of this valve plate has pivot 906, through pivot valve plate and body rotatable coupling, the reprint is through rotating around the pivot in order to realize sealed to first feed liquor end or second feed liquor intraductal side-measuring. And in order to ensure the sealing effect of the valve plate, the valve plate is provided at both sides thereof with blocks 907 which are gradually raised along the proceeding direction of the demineralized water, respectively. When the desalted water flows, pressure is generated on the inclined block contacted with the desalted water, and the component force of the pressure drives the valve plate to be tightly pressed against the end face of the first liquid inlet pipe or the second liquid inlet pipe in a sealing mode. And a second water pump 12 is arranged on the second backwashing pipe in order to enable the valve plate to turn up and down. When the total amount of the desalted water in the system needs to be supplemented, a worker starts the second water pump, the external desalted water is pumped into the second backwashing pipeline under the action of the second water pump, and the high-pressure desalted water jacks the valve plate and rises to the end face of the inner side of the first liquid inlet pipe to be blocked. At the moment, the first liquid inlet pipe is blocked, and external demineralized water backwashes the surface of the filter screen rotary drum and supplements the demineralized water in the system incidentally.

As a further improvement of the above embodiment, a plurality of grooves 908 are uniformly distributed on the inclined surface of the inclined block 907, and specifically, the grooves are arranged along the width direction of the inclined block.

As a further improvement of the above embodiment, the swash block is provided with a cavity 909 inside in order to reduce resistance when the push valve plate is flipped.

As a further improvement of the above embodiment, in order to improve the sealing performance of the valve plate 905 with respect to the first liquid inlet pipe 902 or the second liquid inlet pipe 903, a sealing groove 910 is provided on the inner end surface of the first liquid inlet pipe or the second liquid inlet pipe, and a sealing strip 911 is embedded in the sealing groove.

As a further improvement of the above embodiment, when the amount of the desalted water in the replenishing channel in the filter box is too large, an overflow pipe 13 is further provided in the filter box in order to prevent the overflowed desalted water from overflowing randomly.

Claims

1. The utility model provides a pelleter demineralized water filter screen rotary drum back flush system which characterized in that: the filter comprises a filter box, wherein a filter screen rotating cylinder is arranged above the filter box, and an ultrafiltration screen cylinder, a first water pump, a check valve and an underwater granulator are sequentially connected in series on the side of the filter box through a main pipeline; the liquid outlet end of the underwater granulator extends to the upper part of the filter screen rotary drum through a main pipeline; a spray head which is opposite to the surface of the filter screen rotary drum is arranged on the outer side of the filter screen rotary drum, the liquid inlet end of the spray head is connected with a switching mechanism, the switching mechanism is also respectively communicated with a first backwashing pipe and a second backwashing pipe, and the first backwashing pipe is communicated with a main pipeline from a check valve to an underwater granulator; the second backwash pipe is in communication with an external source of desalinated water.

2. The system of claim 1, wherein the backwash system comprises: the switching mechanism comprises a body, wherein a first liquid inlet pipe, a second liquid inlet pipe and a liquid outlet pipe are arranged on the body, the first liquid inlet pipe is connected with the first backwashing pipe, the second liquid inlet pipe is connected with the second backwashing pipe, and the liquid outlet pipe is connected with the spray head; a valve plate is arranged in the body in a turnover manner, a rotating shaft on the valve plate is arranged close to the intersection of the first liquid inlet pipe and the second liquid inlet pipe, two side surfaces of the valve plate are provided with inclined blocks, and the inclined blocks are gradually increased along the advancing direction of the desalted water; and a second water pump is also arranged on the second backwashing pipe.

3. The system of claim 2, wherein the backwash system comprises: a plurality of grooves are uniformly distributed on the inclined plane of the inclined block and are arranged along the width direction of the inclined block.

4. The system of claim 2, wherein the backwash system comprises: a hollow cavity is arranged in the inclined block.

5. The system of claim 2, wherein the backwash system comprises: and sealing grooves are formed in the inner end faces of the first liquid inlet pipe and the second liquid inlet pipe, and sealing strips are embedded in the sealing grooves.

6. The system of claim 1, wherein the backwash system comprises: an overflow pipe is further arranged on the filter box.