CN215906460U

CN215906460U - Long, short-staple switching pipeline of fiberizer feed

Info

Publication number: CN215906460U
Application number: CN202121888805.6U
Authority: CN
Inventors: 王雪庆; 刘胜军; 蔺玉刚
Original assignee: Vinda Paper Shandong Co Ltd
Current assignee: Vinda Paper Shandong Co Ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-02-25
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses a long and short fiber switching pipeline for feeding of a pulping machine, which comprises a short fiber grinding forebay and a long fiber grinding forebay; the short fiber pre-milling pool and the long fiber pre-milling pool are respectively connected to the inlet of the pulping machine through a gate valve and a material pump; the outlet of the pulping machine is respectively connected with a first butterfly valve and a second butterfly valve; the first butterfly valve is connected to a short fiber grinding pool; the second butterfly valve is respectively connected with the long fiber pool flowmeter and the backflow pool flowmeter; the long fiber pool flowmeter and the backflow pool flowmeter are connected to a long fiber grinding rear pool and a long fiber grinding front pool; a first pneumatic regulating valve is arranged between the long fiber tank flowmeter and the long fiber grinding tank; and a second pneumatic regulating valve is arranged between the flow meter of the backflow tank and the long fiber grinding forebay. The utility model provides a long and short fiber feeding switching pipeline of a pulping machine, which is used for modifying a short fiber mill so that the short fiber mill can mill long fibers and also can mill short fibers; and the long/short fiber realizes one-key switching without switching the valve on and off on site, thereby reducing manual operation.

Description

Long, short-staple switching pipeline of fiberizer feed

Technical Field

The utility model relates to a pulp grinding system, in particular to a long and short fiber feeding switching pipeline of a pulp grinder, and belongs to the technical field of pulp grinding.

Background

The pulping machine is pulping equipment, belongs to the class of equipment accessories, is suitable for continuous pulping of chemical wood pulp, mechanical pulp and waste paper pulp, is suitable for the concentration of the pulp to be 2-5%, is provided with an automatic control system, realizes the pulping with constant energy consumption or constant power and has stable pulping effect; in the prior art, after the paper machine is generally added, due to the fact that the consumption of pulp is doubled, the situation of insufficient supply of long-fiber pulp occurs during pulping at high speed of the paper machine, the problem of insufficient pulp supply cannot be solved by simply improving the throughput or concentration of a pulp grinder, and therefore the pulp grinder needs to be added, but if one pulp grinder is added, the investment cost is huge, the supply period and the construction period are long, and the field installation environment is limited.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a long and short fiber feeding switching pipeline of a pulping machine, which is used for modifying a short fiber mill so that the short fiber mill can mill long fibers and also can mill short fibers; and the long/short fiber realizes one-key switching without switching the valve on and off on site, thereby reducing manual operation.

The utility model relates to a pulping machine feeding long and short fiber switching pipeline, which comprises a short fiber grinding forebay and a long fiber grinding forebay; the short fiber pre-milling pool and the long fiber pre-milling pool are respectively connected to the inlet of the pulping machine through a gate valve and a material pump; the outlet of the pulping machine is respectively connected with a first butterfly valve and a second butterfly valve; the first butterfly valve is connected to a short fiber grinding pool; the second butterfly valve is respectively connected with the long fiber pool flowmeter and the backflow pool flowmeter; the long fiber pool flowmeter and the backflow pool flowmeter are connected to a long fiber grinding rear pool and a long fiber grinding front pool; a first pneumatic regulating valve is arranged between the long fiber tank flowmeter and the long fiber grinding tank; a second pneumatic regulating valve is arranged between the flow meter of the backflow tank and the long fiber pre-grinding tank, and a certain pulping machine is improved, so that long fiber grinding and short fiber grinding can be switched by using the pulping machine, the pulping machine continuously works, and when the feeding of a short fiber post-grinding tank or a long fiber post-grinding tank is not enough lower than a threshold value, auxiliary pulping is realized through a switching pipeline, so that the pulping requirement is met; modifying the pipeline, and adding an inlet long fiber pipeline, an outlet to a long fiber grinding pond and a backflow pipeline; when the improvement is carried out, the pipeline is modified, an inlet long fiber pipeline is added, and an outlet to a long fiber grinding pond and a backflow pipeline are added; after improvement, the long and short fiber pulping pipelines are switched to prevent abnormal actions by adding interlocking protection; if the interlocking between the inlet valves of the pulping pump is increased, only one gate valve can be opened at the same time, the interlocking between the first butterfly valve and the second butterfly valve at the outlet of the pulping machine is increased, only one butterfly valve can be opened at the same time, and the butterfly valves are interlocked, so that the butterfly valves are ensured to be correctly switched, and the pulping machine can be opened; the outlet flow and the reflux flow linkage of the pulping machine are increased, and after switching, the flow signals are automatically switched.

Furthermore, the short fiber post-milling tank and the long fiber post-milling tank are respectively provided with an independent short fiber refiner and an independent long fiber refiner, and the refiners of the utility model are used as a supplement pipeline.

Further, the gate valve, the material pump, the pulping machine, the first butterfly valve, the second butterfly valve, the long fiber pool flowmeter, the backflow pool flowmeter, the first pneumatic regulating valve and the second pneumatic regulating valve are connected to the PLC; the PLC is in communication connection with a control screen for switching long and short fibers.

Furthermore, a password protection module is arranged on the control screen, and misoperation is prevented by adding password protection; after the correct password is input, long fibers or short fibers can be selected, and related valves are interlocked; after 10s, the password is cleared. If the slurry is switched, the password needs to be input again.

Compared with the prior art, the pulping machine provided by the utility model has the advantages that the long and short fiber feeding switching pipeline is used for transforming the short fiber mill, so that the long fiber mill can mill long fibers and the short fiber mill can mill short fibers; the long/short fiber realizes one-key switching without switching the valve on and off on site, thereby reducing manual operation; during operation, any hand valve does not need to be operated, and only the password protection module of the operation interface needs to input password verification and click a button, so that switching among pictures, valves and chains is automatically completed; the operation is simple and convenient, and the system is more flexible.

Drawings

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

Fig. 2 is a schematic structural diagram of a password protection module on a control screen according to the present invention.

Detailed Description

Example 1:

the refiner shown in figure 1 feeds long and short fiber switching lines, which comprise a short fiber refining front pool 1 and a long fiber refining front pool 2; the short fiber grinding forebay 1 and the long fiber grinding forebay 2 are respectively connected to an inlet of a pulping machine 5 through a gate valve 3 and a material pump 4; the outlet of the pulping machine 5 is respectively connected with a first butterfly valve 6 and a second butterfly valve 7; the first butterfly valve 6 is connected to a short fiber grinding tank 8; the second butterfly valve 7 is respectively connected with a long fiber pool flowmeter 9 and a backflow pool flowmeter 10; the long fiber pool flowmeter 9 and the reflux pool flowmeter 10 are connected to the long fiber grinding rear pool 11 and the long fiber grinding front pool 2; a first pneumatic regulating valve 12 is arranged between the long fiber tank flowmeter 9 and the long fiber grinding tank 11; a second pneumatic adjusting valve 13 is arranged between the backflow pool flowmeter 10 and the long fiber pre-grinding pool 2, and through improvement on a certain pulping machine, long fiber grinding and short fiber grinding can be switched by using the pulping machine, the pulping machine continuously works, and when the feeding of a short fiber post-grinding pool or a long fiber post-grinding pool is not enough than a threshold value, auxiliary pulping is realized through a switching pipeline, so that the pulping requirement is met, for example, 3 pulping machines, 1 long fiber grinding and 2 short fiber grinding are adopted at present, and through improvement on one of the short fiber grinding, short fiber grinding and long fiber grinding are realized, and the effect of directly grinding the long fiber and the short fiber can be realized through the switching pipeline; modifying the pipeline, and adding an inlet long fiber pipeline, an outlet to a long fiber grinding pond and a backflow pipeline; when the improvement is carried out, the pipeline is modified, an inlet long fiber pipeline is added, and an outlet to a long fiber grinding pond and a backflow pipeline are added; after improvement, the long and short fiber pulping pipelines are switched to prevent abnormal actions by adding interlocking protection; if the interlocking between the inlet valves of the pulping pump is increased, only one gate valve can be opened at the same time, the interlocking between the first butterfly valve and the second butterfly valve at the outlet of the pulping machine is increased, only one butterfly valve can be opened at the same time, and the butterfly valves are interlocked, so that the butterfly valves are ensured to be correctly switched, and the pulping machine can be opened; the outlet flow and the reflux flow linkage of the pulping machine are increased, and after switching, the flow signals are automatically switched.

Wherein the short fiber post-milling tank 8 and the long fiber post-milling tank 11 are respectively provided with an independent short fiber refiner 14 and an independent long fiber refiner 15, and the refiners of the utility model are used as a supplement pipeline. The gate valve 3, the material pump 4, the pulping machine 5, the first butterfly valve 6, the second butterfly valve 7, the long fiber pool flowmeter 9, the reflux pool flowmeter 10, the first pneumatic regulating valve 12 and the second pneumatic regulating valve 13 are connected to the PLC; the PLC is in communication connection with a control screen 16 for switching long and short fibers.

As shown in fig. 2, a password protection module is arranged on the control screen 16, and by adding password protection, misoperation is prevented; after the correct password is input, long fibers or short fibers can be selected, and related valves are interlocked; after 10s, the password is cleared. If the slurry is switched, the password needs to be input again.

The above-described embodiments are merely preferred embodiments of the present invention, and all equivalent changes or modifications of the structures, features and principles described in the claims of the present invention are included in the scope of the present invention.

Claims

1. A long, short fiber switching pipeline of fiberizer feed, its characterized in that: comprises a short fiber grinding forebay and a long fiber grinding forebay; the short fiber pre-milling pool and the long fiber pre-milling pool are respectively connected to the inlet of the pulping machine through a gate valve and a material pump; the outlet of the pulping machine is respectively connected with a first butterfly valve and a second butterfly valve; the first butterfly valve is connected to a short fiber grinding pool; the second butterfly valve is respectively connected with the long fiber pool flowmeter and the backflow pool flowmeter; the long fiber pool flowmeter and the backflow pool flowmeter are connected to a long fiber grinding rear pool and a long fiber grinding front pool; a first pneumatic regulating valve is arranged between the long fiber tank flowmeter and the long fiber grinding tank; and a second pneumatic regulating valve is arranged between the flow meter of the backflow tank and the long fiber grinding forebay.

2. A refiner feed long and short fiber switch line according to claim 1, characterized in that: and the short fiber post-milling tank and the long fiber post-milling tank are respectively provided with an independent short fiber pulping machine and an independent long fiber pulping machine.

3. A refiner feed long and short fiber switch line according to claim 1, characterized in that: the gate valve, the material pump, the pulping machine, the first butterfly valve, the second butterfly valve, the long fiber pool flowmeter, the backflow pool flowmeter, the first pneumatic regulating valve and the second pneumatic regulating valve are connected to the PLC; the PLC is in communication connection with a control screen for switching long and short fibers.

4. A refiner feed long and short fiber switch line according to claim 3, characterized in that: and a password protection module is arranged on the control screen.