CN204080536U - A kind of drying unit of glossy paper paper machine - Google Patents

Abstract

The utility model discloses a kind of drying unit of glossy paper paper machine, comprise drying cylinder, dry net and dry net drying unit, described dry net drying unit comprises U-type groove and air-heater, described U-type groove closed at both ends, dry net is close to along moving in U-type groove, and air-heater is communicated with U-type groove by airduct.The utility model, by arranging dry net drying unit, effectively can be removed the moisture content in dry net, thus ensure drying effect, for follow-up top sizing provides better condition.By arranging dividing plate in U-type groove, dividing plate having airflow hole, can air-flow velocity be increased, thus strengthen drying effect.

Description

A kind of drying unit of glossy paper paper machine

Technical field

The utility model belongs to papermaking equipment field, is specifically related to a kind of drying unit of glossy paper paper machine.

Background technology

Paper machine is formed primarily of the portion such as net, pressing and drying.Mesh portions cylinder and fourdrinier wire two kinds.Press section is made up of pressure roller and papermaker's felt etc.Drying section is made up of one or several drying cylinder.Some fourdrinier also equips calender, to improve the smoothness and tightness etc. of paper.The type of paper machine is a lot, as manufacture machine glazing paper MG. machine (also known as Yankee machine), manufacture paper fourdrinier wire many drying cylinders paper machine, manufacture the thin-paper machine of typing paper and cigarette paper etc., manufacture the board machine etc. of cardboard.

The pulp-water suspended substance meeting papermaking requirement is copied through processes such as filter screen drainage and formation, mechanical presses dehydration and dryings and is made paper by paper machine.Paper machine has comprised the shaping of above technical process, squeezing, oven dry 3 major parts, and be furnished with necessary ornamenting, batch and transmission device, and for slurry, slurry and plain boiled water circulation, vacuum, vented exhaust, broke treatment and the accessory system such as lubrication, automatic control.One-tenth paper web wide (abbreviation is copied wide), copper mesh fabric width and preferred operation speed of machine that the specification Chang Yiqi of paper machine manufactures paper with pulp represent.Copying of modern large-scale paper machine widely reaches 11m, and operation speed of machine reaches more than 1000m/min, and daily output paper amount reaches hundreds of ton, and whole mechanical weight reaches more than dry ton, reaches over one hundred rice.Using more in the production of General development Chinese Home and some speciality papers is sheet machine, and it copies wide 1 ~ 3m, tens meters to 200 meters per minute of operation speed of machine.

Forming section: be made up of head box, breast roll, forming net, suction box and couch roll etc.Spray feed is on forming net equably for the pulping sent here by approach system of head box pulp distributor, and slurry speed should match with network speed.Controlling slurry speed is the principal element selecting head box box with network speed.Totally-enclosed hydraulic pulp flowing box regulates the slurry pressure that send of fan pump to adjust slurry speed, is applicable to high-speed paper machine; Air-cushioned head box regulates air cushion pressure to carry out speed governing, and the high-order head box of open type then highly carrys out speed governing with adjusting tank entoplasm position, is applicable to middling speed paper machine; Open type compartment head box is then applicable to low speed paper machine.Forming net is endless loops net, and between breast roll and couch roll, formed a level or slightly gradient straight wire side, as the active section of dewatering of pulp, custom claims it to be forming table, is thus called fourdrinier wire.If will for no reason be placed on circular cylinder mould by forming net, become the active section of the drainage and formation of arc, be called cylinder.If with the perforated steel net drum of brill, from axle head aspiration vacuum, be then called vacuum rotary screen or vacuum forming net with the dewatering of pulp accelerated on forming net wire side.If paper pulp is under two fourdrinier wires clamp mutually, two nets carry out drainage and formation simultaneously and are then called Aladdin former.These formers have employed multi-form dewatering elements, make online paper pulp accelerate dehydration.Element divide have static, rotate and 3 classes such as both dual-purposes.Stationary element is as dewatering plate, cambered surface vacuum tank etc., and rotating element is as table roll, vacuum forming roller etc.Form except long mesh paper making machine, cylinder mould machine, foudrinier except with single form former, the forming section of the also hybrid former combination of useful multilength net, many cylinders, many folder nets and the oval net of various ways.

Press section: the l Water Paper page after being shaped is dewatered further in the mode of pressurization.It is by hard and soft two rollers of roll surface, as stone roll and rubber roll match composition one group squeezing.Press section is made up of same form or multi-form squeezing group, is wherein also comprising vacuum suction device traditionally.During squeezing, with the felt support page of suitable specification, it can even cloth moulding pressure take away part and be squeezed the moisture squeezed out, and can strengthen the pressure of pressurization, improve press dewatering ability.The linear pressure of the many employing 20 ~ 60kN/m of low speed paper machine, high-speed paper machine adopts up to 210kN/m linear pressure, when adopting heavy impulse squeezing, as presse-pate squeezing can up to 350kN/m linear pressure, rubber covered roll is made vacuum pressure roller, rill pressure roller, lining net pressure roller, blind drilled press roll etc., more effectively squeeze water is taken away nip, since these are all the fifties, adopt the new technology improving press dewatering efficiency.Compound squeezing structure is adopted again to form closed pick up afterwards.It is made up of two groups or three groups of squeezing merging, by vacuum suction roller, l Water Paper is peeled off from forming net, send into unipress by felt support, later page transmits between each pressure roller, thus the page of eliminating over is subject to the draw of the factors such as deadweight to cause the phenomenon of broken end between squeezing.Since the eighties, there is wide nip press technology, tough rubber strip or rubber roll, be out of shape when powerful pressurized, thus have up to 750kN/m linear pressure and wider contact surface, have the dewatering time of obviously prolongation and substantially increase press dewatering ability, on high-speed paper machine, effect is more outstanding.The web dryness going out squeezing now can bring up to 43 ~ 45% from 30 ~ 37% of past, and what have even reaches 50%.Page contacts the number of times of smooth hard roll surface or the number of the number of times in coarse glue face and the dehydrating amount of each, all can affect the surface quality of page.Process rationally then obviously can reduce the difference of page smoothness for two sides, otherwise smoothness for two sides difference also can be caused to increase.

Drying section: drive several drying cylinders to be one group by gear drive or by felt, some groups of drying cylinders form drying section.The linear velocity of each group of drying cylinder can adjust respectively, keeps trace speed between each group of drying cylinder poor to compensate the contraction of page in dry run.Go out the web dryness of drying section generally about 92 ~ 94%.At drying section end, be generally furnished with cooling cylinder, aqueous vapor can be condensed on cooling cylinder face.Condensed water can be beneficial in ornamenting, obtain preferably surface smoothness by moistening page surface.Drying cylinder diameter is best with the effect of 1.5m.One-side glazed paper can obtain higher one-side finish degree by the major diameter drying cylinder in employing high rigidity, best bright finish cylinder face, and major diameter drying cylinder diameter generally adopts 3 ~ 7.5m.

Surface finish portion: with multiple operation process to obtain good surface quality.Most of paper all through calender press polish, makes paper unanimously smooth after paper machine.Calender is made up of several chilled iron rolls, is flattened by paper with the deadweight of each roller or another pressurization.If desired higher surface smoothness then uses supercalender press polish.It is generally made up of alternately paper calender roll and chilled iron roll.According to requirements different, some kinds will improve surface quality through top sizing; What have will be coated with through surface, to improve presentation quality or printing quality.Top sizing, coating can be processed by sizing applicator and coating machine outside paper machine with one-tenth paper, also sizing applicator and coating apparatus can be combined in paper machine and carry out processing in machine.

Transmission system: each for paper machine position is connected run-in synchronism, mechanical electric is integrally formed.Be made up of mechanical deceleration device, governing speed and steady speed controlled device, branch's transmission device etc., all adopt electric power to be power source.

White-water system: be the recovery to the dehydration of paper machine forming section, process and reclaiming system.Comprise the collection of plain boiled water, conveying, filtration or the equipment such as precipitation, air supporting, with separation and recovery fiber and filler multiplexing, and by the whole system of peace and quiet plain boiled water recycle in papermaking process.

Accessory system: be made up of to exhauster system, broke treatment, compressed air system, steam supply water supply drainage system etc. the electrical system supporting with paper machine, vacuum system, lubricating system, workshop.

Glossy paper, in production technology, before applying glue, needs to dry paper surface, but existing drying unit is after operation a period of time, and the moisture content of dry net is cumulative, causes drying effect to be had a greatly reduced quality, can not meet the needs of applying glue.

Utility model content

The utility model object is to provide a kind of drying unit of glossy paper paper machine, solves the problem of the drying effect difference of existing paper machine.

The technical solution of the utility model is: a kind of drying unit of glossy paper paper machine, comprise drying cylinder, dry net and dry net drying unit, described dry net drying unit comprises U-type groove and air-heater, described U-type groove closed at both ends, dry net is close to along moving in U-type groove, and air-heater is communicated with U-type groove by airduct.

Further, in described U-type groove, there is dividing plate, described dividing plate has airflow hole.

Further, the aperture of described airflow hole is 0.5-1cm, and hole density is 2000-4000/cm ².

The utility model compared with prior art tool has the following advantages:

1, the utility model is by arranging dry net drying unit, effectively can remove the moisture content in dry net, thus ensure drying effect, for follow-up top sizing provides better condition.

2, by arranging dividing plate in U-type groove, dividing plate having airflow hole, can air-flow velocity be increased, thus strengthen drying effect.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

In figure, Reference numeral is: 1-air-heater, 2-dividing plate, the dry net of 3-, 4-drying cylinder, 5-U type groove.

Detailed description of the invention

As shown in Figure 1, a kind of drying unit of glossy paper paper machine, drying unit comprises drying cylinder 4, dry net 3 and dry net drying unit, described dry net drying unit comprises U-type groove 5 and air-heater 1, described U-type groove 5 closed at both ends, dry net 3 is close to along moving in U-type groove 5, and air-heater 1 is communicated with U-type groove 5 by airduct.This kind of structure, dry net 3 and U-type groove 5 form cavity, and the hot blast that air-heater 1 produces enters cavity, and from top blowout, thus take away the moisture content on dry net 3, add rapid-curing cutback net 3 dry, thus ensure drying effect, for follow-up top sizing provides better condition.

In order to increase drying efficiency, need the flow velocity ensureing updraft.Therefore, can arrange dividing plate 2 in U-type groove 5, airflow hole opened by dividing plate 2, hot blast upwards produces larger impulse force by airflow hole, thus accelerates rate of drying.Through repeatedly Optimal Experimental, the aperture of airflow hole is 0.5-1cm, and hole density is 2000-4000/cm ²time there is good drying effect.

The above embodiment only have expressed the detailed description of the invention of the application, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the application's protection domain.It should be pointed out that for the person of ordinary skill of the art, under the prerequisite not departing from technical scheme design, can also make some distortion and improvement, these all belong to the protection domain of the application.

Claims (1)

1. the drying unit of a glossy paper paper machine, it is characterized in that: comprise drying cylinder, dry net and dry net drying unit, described dry net drying unit comprises U-type groove and air-heater, described U-type groove closed at both ends, dry net is close in U-type groove along moving, air-heater is communicated with U-type groove by airduct, has dividing plate in described U-type groove, and described dividing plate has airflow hole.