KR200330576Y1 - Paper machine press part provided with roll side showering apparatus - Google Patents

Abstract

The present invention relates to a crimping part of a paper machine including a plurality of rolls through which the felt and the wetland are passed together for forced crimping and dewatering of the wetland supplied from the wire part, and the felt does not touch at both ends of each roll. A roll side showering device is provided to prevent the accumulation of contaminants such as marsh residues by spraying water at an appropriate pressure on the exposed surface, so that the hole of felt and product generated by dropping the contaminants into the felt or marsh during the process is generated. The present invention relates to a crimping part of a paper machine equipped with an improved roll side showering device, so that problems such as paper cutting and the like can be prevented.

Description

Paper machine press part provided with roll side showering apparatus}

The present invention relates to a crimping part of a paper machine equipped with a roll side showering device. The wetland is sprayed with a suitable pressure on a constantly exposed surface where felt is not contacted at both ends of the roll through which the felt and the wetland are passed together. The roll side showering device is provided to prevent the accumulation of contaminants such as debris, thereby improving problems such as hole formation, paper cutting, etc. of felt and products caused by contaminants falling into the felt or wetland during the process. It relates to the pressing part of the paper machine.

In general, in order to manufacture paper, a pulp manufacturing process using pulp or wood is used to produce a pulp that can be used as a raw material, and a papermaking process is performed using pulp produced in this pulp manufacturing process.

In the papermaking process, a paper machine is used. The paper machine uses a pulp fiber obtained from the pulp manufacturing process in water, cuts the long fibers into a suitable size, and incorporates raw materials to form a wetland. ), A press part for compressing and dewatering the wetland by mechanical force, and a dryer part forcibly drying the compressed wetland using a cylinder into which steam is injected.

Here, when looking at the papermaking process using a paper machine in more detail, when the paper material is sprayed into the wire portion of the paper machine, the suction filtration occurs, the natural and forced dehydration occurs to form a wetland as the first paper form.

The wetland is formed in the felt and enters the crimping part, where the crimping is performed by mechanical force as it passes between successive rolls, thereby removing the moisture contained in the paper.

Thereafter, the wetland is transferred to the drying unit along the felt, and drying occurs while passing through the dryers in which the dryer cylinders heated by steam are arranged in parallel.

In this drying process, by injecting steam into the cylinder of the dryer to heat exchange at the surface of the cylinder, the wetland, which has been forcibly dehydrated by mechanical force in the previous compression dehydration process, is forced to dry by heat. Is completed.

Thereafter, the sizing agent is evenly applied to the surface of the paper to increase the penetration resistance of ink and water, the calender process to polish the paper and smooth the surface by using heat and pressure, and the paper as the final stage of the paper machine. The process in the paper machine is finished through a reel process of winding the coil onto a spool roll.

On the other hand, the crimping portion in which the compression dehydration process is also performed in each part of the paper machine is generally a combination of a stone roll and a grooved roll, and the felt and the wetland are moved to the nip between the rolls and the rolls. Forced dehydration is achieved by passing the moisture contained in the wetland to be absorbed into the felt by the capillary phenomenon.

That is, since there is a limit to dehydration by vacuum in the wire part, the crimping part is subjected to forced crimping and dehydration by nip pressure. In this crimping part, it is important to dehydrate while maintaining the formation of the wire part.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the pressing portion of the paper machine.

FIG. 1 is an overall layout view showing an example of a typical crimping unit in a paper machine, and FIG. 2 is a schematic view showing only a transport path of a wetland in the crimping unit of FIG. 1, and the direction in which the wetland is transported in FIGS. 1 and 2. Represented by.

Usually, the crimping portion is composed of a large pick-up felt 20 portion, a 1P felt portion 30, a 3P felt portion 40, and a 4P felt portion 50, as shown in FIG. In each felt portion, the felt is circulated and conveyed while maintaining a predetermined tension state by a plurality of rolls.

Looking at the transfer path of the wetland in the configuration of this crimp section with reference to Figure 2, the wetland first transported along the felt in the wire portion is picked up by the pick-up roll (22) of the pick-up felt portion 20 Then, the first press (hereinafter referred to as 1P) formed by the press suction roll 24 of the pick-up felt part 20 and the 1P SYM-ZS roll 32 of the 1P felt part 30. The nip of the abbreviation) is first passed through the interposed state of the felt, and both sides are primarily dehydrated.

Since the dehydration is performed by the linear pressure formed by the roll 24 and the roll 32 at the 1P, a high linear pressure is used, and the amount of water falls into the hole of the compression suction roll 24 and the groove of the 1P groove roll 32. As it exits, the remainder is transferred to paper and felt, in particular the amount transferred to felt is dewatered in suction boxes 26 and 34 to allow for continuous circulation of the felt.

Thereafter, the wetland passes through the nip portion of the second press (hereinafter abbreviated as 2P) formed by the compression suction roll 24 and the center roll 41 of the pick-up felt portion 20 to perform secondary dehydration by nip pressure. .

In addition, the wetland passing through the nip of 2P is the third press (hereinafter, referred to as 3P) formed by the 3P SYM-ZS roll 42 of the center roll 41 and the 3P felt portion 40. Of the fourth press (hereinafter, abbreviated as 4P) formed by the 4P top roll 51 and the 4P SYM-ZS roll 52 of the nip portion of the 4P felt portion 50 and the 4P top roll 51 of the 4P felt portion 50). Passed through the nips one after another, further dewatered and then transferred to the drying section.

That is, the wetland supplied from the wire part passes through a position where forced crimping and dehydration is performed along the felt, that is, 1P → 2P → 3P → 4P, which is dehydrated into a proper amount of paper, and then is passed to the drying part.

Here, the less the amount of water after 4P, the better the running property of the paper in the drying unit.

However, the conventional crimping portion made as described above has the following problems.

In the crimping part, in particular, the 1P groove roll 32, the 3P groove roll 42, the 4P groove roll 52, and the like are rolls through which the felt and the wetland pass together. The rolls may be contaminated while the residues of wetlands accumulate on the surfaces exposed at both ends of the rolls.

In other words, while most of the center of the roll is in contact with the felt continuously, both ends of the roll are not in contact with the felt, so that contaminants such as residues from wetlands containing moisture can easily accumulate on the surface.

As such, pollutants such as wetland residue accumulated on the surfaces of both ends of the roll are formed to be blown dry by the centrifugal force of the high-speed rotating roll, and when such a mass of pollutants falls into the felt or the wetland, There are many problems, such as creating holes in the felt or holes and paper breaks in the product.

As a result, due to the above-mentioned problem, the process instability to stop the process or idle the machine is increased, as well as the cost and workability, such as the loss of the product due to the replacement of expensive felts, paper chips and holes, etc. As a result, measures to cope with this situation are urgently required.

Therefore, the present invention has been devised to solve the above problems, by spraying water of a suitable pressure on the exposed surface of the felt at both ends of the roll through which the felt and the wetland are passed together, such as wetland residues, etc. The roll side showering device is provided to prevent the accumulation of contaminants. Thus, the roll side has been improved to prevent problems such as hole generation, paper cutting, etc., caused by the contaminants falling into the felt or wetland during the process. It is an object to provide a crimping part of a paper machine equipped with a showering device.

1 is an overall layout of an example of a typical crimp unit in a paper machine,

Figure 2 is a schematic diagram showing only the transport path of the wetland in the crimping portion of Figure 1,

Figure 3 is a schematic diagram showing a position where the injection nozzle of the roll side showering device is installed in the crimping part of the paper machine according to the present invention,

Figure 4 is a schematic diagram showing the configuration of the roll side showering device in the pressing portion of the paper machine according to the present invention.

<Explanation of symbols for the main parts of the drawings>

20: pick-up felt section 22: pickup roll

24: compression suction roll 30: 1P felt part

32: 1P groove roll 40: 3P felt part

41: center roll 42: 3P groove roll

50: 4P felt part 51: 4P top roll

52: 4P groove roll 100: roll side showering device

110: washing water supply means 120: injection nozzle

130: washing water supply line 140: water pressure detection means

150 valve means 160 support means

162: clamp 164: bolt

170: vacuum suction unit 172: suction line

174; Vacuum suction means 176: suction line valve means

Hereinafter, the present invention will be described in detail.

The present invention provides a crimping part of a paper machine comprising a plurality of rolls through which felt and wetland are passed together for forced crimping and dewatering of the wetland supplied from the wire part.

A roll side showering device 100 is provided for spraying water of a proper pressure on a constantly exposed surface that is not in contact with felt at both ends of each roll, and the roll side showering device 100 supplies washing water. Washing water supply means 110, the spray nozzle 120 is installed near the end of the roll toward the nozzle outlet so as to spray the washing water on the normally exposed surface, the washing water supply means 110 and the spray nozzle ( Washing water supply line 130 connecting the 120, the hydraulic pressure detection means 140 and the flow rate control valve means 150 installed on the washing water supply line 130, the injection nozzle 120 and the washing water supply It characterized in that it comprises a support means 160 for supporting a portion of the end of the line 130 around the roll.

In particular, the washing water supply line 130 is fixed directly on the support means 160 arranged in parallel with the roll is a metal pipe 132, the injection nozzle 120 is mounted, the washing water supply means 110 and It consists of a flexible tube 134 connecting the metal pipe 132, the metal pipe 132 is removed by the clamp 162 is fastened to the bolt 164 on the support means 160 for the adjustment of the injection position. It is characterized in that it is fixed to the mounting.

In addition, the washing water supply line 130 further includes a vacuum suction unit 170 that strongly sucks and discharges the washing water therein through one side, and the vacuum suction unit 170 is at one side of the washing water supply line 130. And a branched suction line 172, a vacuum suction means 174 for sucking the washing water through the suction line 172, and a suction line valve means 176 installed on the suction line 172. It features.

In addition, the roll side showering device 100 is characterized in that installed in the 1P groove roll 32, 3P groove roll 42 and 4P groove roll (52).

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The present invention relates to a crimping part of a paper machine including a plurality of rolls through which felt and a wetland are passed together for forced crimping and dewatering of the wetland supplied from the wire part, and on a constantly exposed surface corresponding to both ends of each roll. It is provided with a roll side showering device for cleaning by spraying the water of the appropriate pressure, the present invention relates to a pressurized portion of the paper machine improved to prevent the accumulation of contaminants such as wetland residues on the normally exposed surface of the roll.

Referring to the configuration of the present invention in more detail as follows.

The pressing unit according to the present invention is provided with a roll side showering device configured to spray water of an appropriate pressure on a constant exposure surface of a predetermined section at both ends of the roll through which the felt and the wetland are passed together.

Here, the normally exposed surface refers to the exposed surface of both ends of the roll that the felt does not contact during the process, such that the contaminants such as wetland residues can easily accumulate.

Therefore, in the related art, contaminants accumulated on the constantly exposed surface drop into the felt and the wetland, so that holes, paper fractures, etc. of the felt and the wetland occurred. Roll side showering device is provided to prevent the accumulation of contaminants by spraying.

3 is a schematic view showing a position where the injection nozzle of the roll side showering device is installed in the crimping part of the paper machine according to the present invention as an example, which shows the position where the roll side showering device is installed in the preferred embodiment of the present invention. It shows well.

The wetland supplied from the wire part passes through the position where forced crimping and dehydration is performed along the felt, that is, 1P → 2P → 3P → 4P, which is dehydrated with an appropriate amount of paper and then passed to the drying part.

The roll side showering device according to the present invention should be installed on a roll having a high degree of contamination among the compressed parts in which a plurality of rolls are combined, and therefore, the roll side showering device should be installed on a roll through which felt and a wetland pass together.

The roll side showering device includes a spray nozzle 120 adapted to spray water onto both end surfaces of the rolls that are not in contact with the felt, i. Only spray nozzles are shown simply to clearly indicate which rolls can be installed.

As a preferred embodiment, as shown in Figure 3, the roll side showering device is a 1P groove roll 32, 3P groove roll (1P, 3P and 4P) to compress the felt and the wetland at positions of 1P, 3P and 4P in consideration of the installation space thereof. 42) and the 4P groove roll 52 may be applied and installed, and the installation position of the roll side showering device may be added or changed as necessary if it is a roll requiring cleaning of the exposed surface as described above. .

On the other hand, Figure 4 attached is a schematic view showing the configuration of the roll side showering device in the pressing portion of the paper machine according to the present invention, looking at the configuration as follows.

The roll side showering device 100 is a spray nozzle installed near the roll end so that the washing water supply means 110 for supplying the washing water and spray water can be sprayed on the exposed surface of the end of the roll that does not contact the felt 120, the washing water supply line 130 connecting the washing water supply means 110 and the spray nozzle 120, and the hydraulic pressure detecting means 140 and the flow rate control is provided on the washing water supply line 130 The valve means 150 and the support means 160 for supporting a part of the end of the injection nozzle 120 and the washing water supply line 130 around the roll.

As an example of the spray nozzle 120 that can be implemented, it is possible to use, as a spray type, the diameter of the nozzle outlet to which the washing water is sprayed is 0.6 to 0.8 mm, the distance between the nozzle outlet and the roll surface is 120 mm, and has a spray angle of 90 °. .

In addition, the pressure of the washing water supplied to the injection nozzle 120 through the washing water supply line 130 by adjusting the valve means 150, that is, the hydraulic pressure on the washing water supply line 130 detected through the water pressure detecting means 140 Is preferably maintained at 0.8 bar, and the water quality of the washing water is preferably used in order to prevent clogging of the injection nozzle 120.

The washing water supply line 130 is fixed on the support means 160, the part of the end of the injection nozzle 120 is installed is long parallel to the roll, while the injection nozzle 120 is installed as part of the end It consists of a metal pipe 132 directly fixed on the support means 160, and a flexible tube 134 connecting the washing water supply means 110 and the metal pipe 132, in particular the metal pipe ( 132 is preferably to be removable / mounted by the clamp 162 is fastened to the bolt 164 on the support means (160).

This is to adjust the injection position by properly moving the injection nozzle 120 in the longitudinal direction on the support means 160.

The spray nozzle 120 is installed to spray the washing water in a predetermined section with a high degree of contamination even at the regular exposure surface of the end of the roll. ) And then the injection nozzle 120 and the metal pipe 132 is properly moved on the length of the support means 160 and then bolted again to be fixed by the clamp 162.

On the other hand, in order to facilitate the opening work when the nozzle outlet is clogged, the roll side showering device 100 is a separate vacuum suction unit 170 for strongly sucking and discharging the washing water therein through one side of the washing water supply line 130. This includes a suction line 172 branched from one side of the washing water supply line 130, a vacuum suction means 174 for sucking the washing water through the suction line 172, and the suction line 172 It comprises a suction line valve means 176 is installed on.

The suction line valve means 176 is to allow the suction force provided from the vacuum suction means 174 to be selectively supplied to the wash water supply line 130 through the suction line 172, the opening of the nozzle outlet is The valve means 150 of the washing water supply line 130 is completely closed, the suction line valve means 176 is opened, and the vacuum suction means 174 is driven to keep foreign substances blocking the nozzle outlet of the spray nozzle 120 from the washing water. The suction and discharge is carried out toward the vacuum suction means 174 together.

Of course, the suction line valve means 176 should be closed in a state in which the washing water is supplied to the spray nozzle 120 through the washing water supply line 130 (the washing water is injected).

The roll side showering device 100 having the above-described configuration should be installed in each roll so that each roll can be washed separately at each end side of the normally exposed surface. The bay is shown.

In this way, the crimping part of the present invention is provided with a roll side showering device that sprays water at an appropriate pressure on the exposed surface where the felt does not contact at both ends of the roll through which the felt and the wetland are passed together. It is possible to prevent the accumulation of contaminants such as wetland residue on the normally exposed surface of the roll.

As described above, in the press section of the paper machine according to the present invention roll side showering device for spraying water of a suitable pressure on the exposed surface that the felt does not contact at both ends of the roll through which the felt and the wetland By being provided, it is possible to prevent the accumulation of contaminants such as wetland residues on the exposed surface of the roll, which is a hole in the existing felt and product that was generated by the contaminants falling into the felt or wetland from the exposed surface of the roll It can prevent problems such as problems and troubles.

In addition, as the occurrence of the above problems can be prevented, the stability of the process can be greatly improved, cost reduction can be expected by reducing the cost loss due to replacement of the felt and product damage, and workability can be improved. .

Claims (4)

In the crimping part of a paper machine comprising a plurality of rolls through which felt and wetland are passed together for forced crimping and dewatering of the wetland supplied from the wire part, A roll side showering device 100 is provided for spraying water of a proper pressure on a constantly exposed surface that is not in contact with felt at both ends of each roll, and the roll side showering device 100 supplies washing water. Washing water supply means 110, the spray nozzle 120 is installed near the end of the roll toward the nozzle outlet so as to spray the washing water on the normally exposed surface, the washing water supply means 110 and the spray nozzle ( Washing water supply line 130 connecting the 120, the hydraulic pressure detection means 140 and the flow rate control valve means 150 installed on the washing water supply line 130, the injection nozzle 120 and the washing water supply Pressing part of the paper machine equipped with a roll side showering device, characterized in that it comprises a support means 160 for supporting a portion of the end of the line 130 around the roll According to claim 1, wherein the washing water supply line 130 is fixed directly on the support means 160 is arranged long parallel to the roll and the metal pipe 132, the spray nozzle 120 is mounted, and the washing water supply means Consists of a flexible tube 134 connecting the 110 and the metal pipe 132, the metal pipe 132 is fastened by a bolt 164 on the support means 160 for adjusting the injection position The pressing unit of the paper machine provided with a roll side showering device, characterized in that is fixed to the removable / mounting. The washing water supply line 130 of claim 1, further comprising a vacuum suction unit 170 for strongly sucking and discharging the washing water therein through one side of the washing water supply line 130, and the vacuum suction unit 170 includes the washing water supply line 130. Suction line 172 branched from one side of the), a vacuum suction means 174 for sucking the wash water through the suction line 172, and the suction line valve means 176 installed on the suction line 172 Pressing part of the paper machine is provided with a roll side showering device comprising a. The roll side showering device 100 of claim 1, wherein the roll side showering device 100 is installed on the 1P groove roll 32, the 3P groove roll 42, and the 4P groove roll 52. part.