JP2009062634A - Auxiliary cleaning device for diffusion washer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary cleaning device for efficiently carrying out an operation by considering that when a diffusion washer is cleaned in periodic inspection, an operator riding on a screen plate holds a cleaning nozzle, sprays cleaning water on the screen plate, however, the operator has an operation in an unstable state by reaction force by cleaning water spray. <P>SOLUTION: The auxiliary cleaning device 20 mainly consist of a frame part 21 mounted over and fixed on adjacent screen plates of concentrically arranged screen plates 4a, 4b, 4c and 4d and leg parts 22 is detachably arranged and cleaning nozzles 30 are retained in the auxiliary cleaning device. Upper guide rollers rolling on the top surfaces of the screen plates 4 are installed on the lower side of the frame part 21. Cleaning water is sprayed from the cleaning nozzles 30 and an operator sprays cleaning water on the screen plates 4 and cleans them while moving the auxiliary cleaning device 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a washing assist device for a diffusion washer that can easily perform a washing operation by reliably holding a washing nozzle when washing a screen plate of a diffusion washer used for washing pulp raw materials during inspection and cleaning. .

  In the process of producing pulp as a papermaking raw material, the pulp raw material boiled in the digester is discharged together with the black liquor from the digester and discharged together with bleaching chemicals from the bleaching equipment. For this reason, it is necessary to dilute the pulp raw material to separate the chemical solution, and a diffusion washer is used for the separation of the chemical solution. As shown in FIG. 5, in the diffusion washer 1, when the pulp material is blown from the lower end portion of the inverted conical diffusion box 2, the blown pulp material rises and rises in the diffusion box 2, and this diffusion The screen zone 3 arranged at the top of the box 2 is reached. In the screen zone 3, a plurality of cylindrical screen plates 4 are arranged concentrically at regular intervals in the radial direction, and diluted water is sprayed onto the pulp material to be diluted and washed, so that The chemical solution is separated. The chemical solution that has passed through the screen plate 4 is discharged from the outer peripheral portion of the screen zone 3 through the liquid collection pipe 5. When the diluted pulp raw material moves up the screen zone 3 and reaches above the screen plate 4, the upper part of the screen plate 4 is scraped off by a scraper 6 that rotates in the circumferential direction along the screen plate 4. Then, the scraped pulp raw material is supplied from the raw material pipe 7 to the next process.

  The screen plate 4 rises slightly faster than the pulp ascending speed, and moves up and down rapidly. The screen is prevented from being clogged by backflushing during the descent. However, since the diffusion washer 1 is a part of a pulp manufacturing process that is continuously operated, the diffusion washer 1 is continuously operated for a long period of time. For this reason, it may not be sufficiently washed by backflushing, and scale components in the chemical solution may adhere and cause clogging. In the pulp manufacturing process, there is a period in which the factory is stopped and repairs are carried out all at once. The diffusion washer 1 is inspected during this period, and the screen plate 4 is washed to remove clogging. Has been done.

  Cleaning at the time of inspection is performed by an operator inserting a cleaning water nozzle between the screen plates 4 from above the screen plate 4 and spraying the cleaning water toward the screen plates 4. At this time, the worker performs the work while holding the cleaning nozzle by using the plate material hung on the upper part of the screen plate 4 as a scaffold.

  As described above, the washing of the diffusion washer 1 is performed by an operator riding on a plate material for a scaffold. Since the scaffold is at a high position, the work is performed at a high place. Since the washing water is jetted with a strong force, the worker must hold the washing nozzle securely and not to step off the scaffold due to the reaction force of the washing water jet. In addition, the plate material of the scaffold gets wet with the cleaning water and is slippery, and the workers at the time of cleaning are strained. Therefore, a considerable amount of time is required for the cleaning work.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a diffusion washer cleaning auxiliary device that reduces the burden on workers when cleaning is performed at the time of checking a diffusion washer so that a safe cleaning operation can be performed.

  As a technical means for achieving the above-mentioned object, the washing washer of the diffusion washer according to the present invention is a pulp manufacturing process, in which a chemical solution is separated by spraying dilution water onto a pulp raw material, and the separated chemical solution has a concentric diameter. Cleaning of the diffusion washer used for cleaning by spraying the cleaning water from the cleaning nozzle to the screen plate during inspection and cleaning of the diffusion washer that passes through the screen plate arranged at equal intervals in the direction and is discharged to the outside. In the auxiliary device, the nozzle holding means is mounted on the upper end of the screen plate and has a nozzle holding portion for holding a cleaning nozzle for injecting the cleaning water, and the nozzle holding means is the screen plate. The screen plate can be attached to and detached from the screen. It is characterized in that by moving in the circumferential direction along the preparative guiding the cleaning nozzle.

  In a state where the cleaning nozzle is held in the nozzle holding portion of the nozzle holding means, cleaning water is sprayed from the cleaning nozzle. At this time, the worker does not need to hold the cleaning nozzle. If the cleaning water is sprayed while moving the nozzle holding means along the screen plate, the entire area of the screen plate can be cleaned.

  Further, in the diffusion washer cleaning auxiliary device according to the invention of claim 2, the nozzle holding means is joined to a gantry part spanned between a pair of adjacent screen plates of the screen plate, and the gantry part, A leg portion connected to each of the pair of screen plates; a nozzle holding portion formed in the pedestal portion and having a through hole through which the cleaning nozzle is inserted; and provided on a lower surface of the pedestal portion; An upper guide roller that rolls on the upper end surface of the screen, and a lower guide roller that is provided on the leg and rolls when contacting the cylindrical surface of the screen plate.

  When the leg portion is positioned at a position sandwiching adjacent screen plates, the pedestal portion is stretched over the screen plates. When the cleaning nozzle is inserted into the nozzle holding portion, the cleaning nozzle is held by the nozzle holding means, and the screen plate can be cleaned by spraying cleaning water from the cleaning nozzle. Further, when the nozzle holding means is moved in the circumferential direction along the screen plate, the cleaning position can be changed. Since this movement is guided by the upper guide roller and the lower guide roller, it can be moved smoothly.

  According to the washing assist device for a diffusion washer according to the present invention, the screen plate of the diffusion washer can be washed in a state where the washing nozzle is held, so that an operator does not need to hold the washing nozzle. For this reason, an operator does not receive the reaction force by the injection of cleaning water, and a stable cleaning operation can be performed. Moreover, the cleaning position can be easily changed by moving the nozzle holding means at the upper end of the screen plate, and the entire area of the screen plate can be reliably cleaned. In addition, although a nozzle holding means can be moved by an operator's manual power, it can also be moved by transmitting the output of drive devices, such as a motor, via a transmission mechanism.

  Further, according to the diffusion washer cleaning auxiliary device according to the second aspect of the present invention, the cleaning nozzle can be reliably held by the nozzle holding means having a simple structure. Moreover, since the movement of the nozzle holding means is guided by the guide roller, the nozzle holding means can be moved smoothly, and the cleaning operation can be performed more smoothly. Therefore, the cleaning operation can be completed in a short time during the inspection of the diffusion washer, and a smooth inspection operation can be performed.

  Hereinafter, based on the preferred embodiment shown in the drawings, a washing assist device for a diffusion washer according to the present invention will be specifically described.

  FIG. 1 is a schematic perspective view showing a state where a cleaning nozzle 30 is held in a cleaning auxiliary device 20 of a diffusion washer according to the present invention, with a part omitted. 2 is a schematic perspective view showing a state where the cleaning auxiliary device 20 is mounted on the screen plate 4 of the diffusion washer 1 with a part omitted, FIG. 3 is a plan view, and FIG. 4 is a front sectional view. FIG. As shown in FIG. 3, four cylindrical screen plates 4 are attached to the attachment arm 11 at substantially equal intervals in the radial direction. These screen plates 4 are referred to as screen plates 4a, 4b, 4c and 4d in order from the inner side. A nozzle 10 for injecting dilution water is disposed between the screen plates 4a, 4b, 4c, and 4d. These nozzles 10 are supported while being suspended from a scraper 6 disposed above the screen plate 4, and rotate together with the scraper 6 about the axis of the screen plate 4.

  The cleaning auxiliary device 20 is attached to the adjacent screen plates 4a, 4b, 4c, 4d among the screen plates 4a, 4b, 4c, 4d. For this reason, the cleaning auxiliary device 20 includes a gantry portion 21 disposed above the adjacent screen plate 4 and an end portion of the gantry portion 21 that is opposite to the gantry portion 21, and an end portion in the radial direction of the screen plate 4. It is comprised mainly by the leg part 22 joined to each of these.

  The end of the pedestal 21 is extended to a position where it passes through the adjacent screen plate 4 so that the leg 22 is positioned at a position sandwiching each of the adjacent screen plates 4. A lower guide roller 23 that is rotatable about a direction parallel to the axial direction of the screen plate 4 is provided at the tip of each leg portion 22. An upper guide roller 24 that is rotatable about a direction parallel to the radial direction of the screen plate 4 is provided on the lower surface of the gantry 21. The portion 21 is placed on each upper end surface of the pair of screen plates 4 over which the portion 21 is stretched.

  As shown in FIG. 2, a through hole 25 is formed at a position corresponding to a position between the pair of screen plates 4 that are spanned over a part of the gantry 21. Thus, as shown in FIG. 1, a nozzle bracket 26 is provided extending upward. A nozzle bracket 26 is provided on the upper surface of one end of the gantry 21 so as to extend upward. A cylindrical nozzle holder 31 formed of a short tube or the like is attached to these nozzle brackets 26 using fixing means such as U bolts 32. The nozzle holder 31 attached to the nozzle bracket 26 facing the through hole 25 is loosely inserted into the through hole 25. These nozzle holders 31 are provided with a fixing screw 31a penetrating the side wall of the nozzle holder 31. As shown in FIG. 1, it is preferable that the fixing screw 31a is a thumbscrew because the operability is improved. As shown in FIG. 1, the cleaning nozzle 30 can be loosely inserted into the nozzle holder 31, and the fixing screw 31a is tightened while the cleaning nozzle 30 is loosely inserted. The cleaning nozzle 30 is fixed to the nozzle holder 31. The cleaning nozzle 30 is connected to a hose 33 for circulating cleaning water. In addition, as shown in FIG.1 and FIG.2, as for this washing | cleaning auxiliary | assistance apparatus 20, it is preferable to make it the weight which becomes convenient for handling by joining and assembling a strip board material by welding etc. As shown in FIG.

  The operation of the washing assist device for a diffusion washer according to the present invention configured as described above will be described below.

  When the pulp manufacturing process is stopped due to periodic inspection or the like, the diffusion washer 1 is also stopped. At this time, the diffusion washer 1 is washed. At this time, in order to remove clogging of the screen plate 4, washing is performed by spraying washing water.

  The cleaning auxiliary device 20 is installed over a pair of adjacent screen plates 4 to be cleaned. At this time, the pedestal 21 is positioned so that the leg 22 is positioned outside the screen plate 4b outside the pair of adjacent screen plates 4a, 4b and inside the screen plate 4a inside. The screen plates 4a and 4b are straddled. At this time, the upper guide roller 24 is placed on the upper end surfaces of the screen plates 4a and 4b. In this state, the lower guide rollers 23 are positioned so as to face the inner side surface of the screen plate 4a and the outer side of the screen plate 4b.

  The cleaning nozzle 30 is loosely inserted into the nozzle holder 31 fixed to each of the nozzle brackets 26 attached to the gantry 21 of the cleaning auxiliary device 20, and the cleaning screw 30 is tightened with the fixing screw 31a. Is held by the nozzle holder 31, and the tip of the cleaning nozzle 30 is positioned between the screen plates 4a and 4b. In this state, the cleaning nozzle 30 is held by the cleaning auxiliary device 20 with the tip positioned between the screen plates 4a and 4b. While spraying the cleaning water from the cleaning nozzle 30, the operator adjusts the spraying direction of the cleaning nozzle 30 so that the cleaning water is sprayed onto the screen plates 4a and 4b.

  The screen plates 4a and 4b are cleaned while the cleaning auxiliary device 20 is moved along the screen plates 4a and 4b. This movement is performed by an operator pushing the cleaning auxiliary device 20, but the upper guide roller 24 rolls on the upper end surfaces of the screen plates 4a and 4b, so that the cleaning auxiliary device 20 is smoothly moved. Can be moved to. In addition, if the upper guide roller 24 is moved from the upper end surface because the lower guide roller 23 comes into contact with either of the screen plates 4a, 4b when trying to shift from the upper end surface of the screen plates 4a, 4b during the movement. It will not come off. As will be described below, the motor can be moved using the power of the motor without depending on the human power of the worker.

  The nozzle 10 hangs down from the scraper 6 of the diffusion washer 1, and this nozzle 10 is rotated in the diffusion washer 1 by a motor. For this reason, if the cleaning auxiliary device 20 is connected to the nozzle 10 using a bracket or the like, the cleaning auxiliary device 20 can be turned by turning the nozzle 10. At this time, it is preferable to move the cleaning auxiliary device 20 at a lower speed than the turning speed of the nozzle 10 during the operation of the diffusion washer 1. Even if the output shaft of the motor that rotates the nozzle 10 is manually rotated, the cleaning auxiliary device 20 can be moved and the moving speed of the cleaning auxiliary device 20 can be reduced. It is also preferable to rotate the shaft.

  If the cleaning auxiliary device 20 is moved within a range of 360 °, the height position of the cleaning nozzle 30 is changed to change the cleaning range, and the screen plates 4a and 4b are cleaned in the same manner as described above. By repeating this operation, the screen plates 4a and 4b facing the cleaning nozzle 30 at that time are cleaned.

  In addition, when the cleaning of the screen plates 4a and 4b is completed, the cleaning auxiliary device 20 is installed again so as to be passed over the screen plates 4c and 4d, and the cleaning water is sprayed from the cleaning nozzle 30 in the same manner as described above. Then, the screen plates 4c and 4d are washed to eliminate clogging.

  When cleaning the screen plate 4, the operator does not need to hold the cleaning nozzle 30. For this reason, the cleaning operation can be performed more safely without receiving a reaction force due to the injection of the cleaning water. In addition, since the cleaning auxiliary device 20 can be moved smoothly, the work efficiency can be improved and the cleaning operation can be performed in a short time.

  According to the diffusion washer cleaning auxiliary device according to the present invention, the cleaning operation can be performed more easily and safely, and the cleaning operation can be made more efficient and contributes to the reduction of the time required for the inspection operation.

It is a schematic perspective view which abbreviate | omits one part and shows the state which hold | maintained the nozzle for washing | cleaning of the washing | cleaning auxiliary device of the diffusion washer concerning this invention. FIG. 3 is a perspective view of the diffusion washer cleaning auxiliary device according to the present invention mounted on the screen plate of the diffusion washer, showing a state where the cleaning nozzle is not held. FIG. 3 is a plan view of the state shown in FIG. 2. FIG. 3 is a front view of the state shown in FIG. 2, partially cut away. It is a figure explaining schematic structure of a diffusion washer, and is a perspective view which fractures and shows a part.

Explanation of symbols

1 Diffusion Washer 2 Diffusion Box 3 Screen Zone 4 Screen Plate 6 Scraper
10 nozzles
20 Cleaning aid
22 legs
23 Lower guide roller
24 Upper guide roller
25 Through hole
26 Nozzle bracket
30 Cleaning nozzle
31 Nozzle holder
31a Fixing screw
32 U bolt
33 hose

Claims (2)

In the pulp manufacturing process, diluting water is sprayed on the pulp raw material to separate the chemicals, and the separated chemicals are inspected and cleaned through the screen plates that are concentrically arranged at regular intervals in the radial direction and discharged to the outside. Sometimes, in the washing assist device for the diffusion washer used when washing is performed by spraying washing water from the washing nozzle onto the screen plate,
Nozzle holding means mounted on the upper end of the screen plate and having a nozzle holding part for holding a cleaning nozzle for injecting the cleaning water,
A cleaning auxiliary device for a diffusion washer characterized in that the nozzle holding means is detachable from the screen plate and moves in the circumferential direction along the screen plate in a mounted state to guide the cleaning nozzle. The nozzle holding means includes a pedestal portion that spans between a pair of adjacent screen plates of the screen plates;
Legs joined to the gantry and connected to each of the pair of screen plates;
A nozzle holding part formed of a through hole that is formed in the gantry and allows the cleaning nozzle to be inserted therethrough;
An upper guide roller provided on a lower surface of the gantry, and rolling on an upper end surface of the screen plate;
The diffusion washer cleaning auxiliary device according to claim 1, further comprising a lower guide roller that is provided on the leg portion and rolls when contacting the cylindrical surface of the screen plate.

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