CN217781579U

CN217781579U - Paper web spraying and humidifying device

Info

Publication number: CN217781579U
Application number: CN202221327857.0U
Authority: CN
Inventors: 何建平; 黄勤龙; 应雪云; 黄美娟
Original assignee: Jiangxi Jiemei Electronic Information Material Co ltd
Current assignee: Jiangxi Jiemei Electronic Information Material Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-11-11
Anticipated expiration: 2032-05-31

Abstract

The utility model relates to a papermaking field especially relates to a paper web spraying humidification device. The utility model discloses a spraying mechanism that the inner tube constitutes is established to the outer pipe box, and at the humidification in-process of paper web, steam fills with the cavity between inner tube and the outer tube earlier after the through-hole blowout of inner tube, and along with the blowout that lasts of steam, cavity internal pressure improves and makes steam spray from the opening part to the paper web surface, to the even humidification of paper web. Compared with the prior art, the utility model discloses can not have the overlap and leave white region, guarantee the homogeneity of humidification.

Description

Paper web spraying and humidifying device

Technical Field

The utility model relates to a papermaking field especially relates to a paper web spraying humidification device.

Background

The base paper for electronic component storage carriers is generally formed by compounding a plurality of layers of wet paper sheets, and is generally formed by using bleached wood pulp, chemimechanical pulp and waste paper pulp as raw materials, performing processes such as pulping, purification and pulp refining, then performing web-fed papermaking compounding, wet paper pressing, surface sizing, drying and press polishing. In the production process, due to the influence of a plurality of factors such as pulp feeding mode, precision of a former area, difference of dewatering speed of different areas of a net surface and a blanket, concentration fluctuation, difference of drying strength of different areas of a drying part and the like, the paper or the paperboard has the phenomena of nonuniform moisture of a cross web, nonuniform thickness of the cross web and warping, so that the surface of the paper is rough and high, the defects of large surface tension, large fluff fluctuation and the like are easily caused, and the quality of the base paper is reduced.

In order to solve the problems, the publication number CN204849477U discloses a paper web spraying and humidifying device, which comprises a steam humidifying and mixing system and a spraying system, wherein an outlet of the steam humidifying and mixing system is connected with an inlet of the spraying system, the spraying system comprises a hot water pipe, a hot water branch pipe which is connected with the hot water pipe and is longitudinally arranged below a paper web, and a plurality of spraying nozzles which are connected with the upper part of the hot water branch pipe, the longitudinal dimension of the hot water branch pipe is consistent with the width dimension of the paper web, each spraying nozzle respectively corresponds to the corresponding width part of the sprayed paper web, and the plurality of spraying nozzles cover the whole paper web width area where the hot water branch pipe corresponds to the width of the paper web. The device adopts a plurality of fog nozzles to carry out humidification to the body paper.

It still has the following drawbacks: the spray range has overlapping and blank areas, and the humidification is easy to be uneven, so that the quality of the paper web is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough and provide a paper web spraying humidification device.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a web spray moistening device comprises a spraying mechanism located below a web, a steam generating mechanism continuously outputting steam to the spraying mechanism, and a control valve controlling the steam pressure.

The spraying mechanism is used for humidifying the whole width area of the paper web and consists of an outer pipe and an inner pipe arranged inside the outer pipe, and a cavity is formed between the outer pipe and the inner pipe. The outer tube is provided with an opening having a length corresponding to the width of the paper web and facing the surface of the paper web, and the inner tube is provided with a through hole for spraying steam into the cavity. Steam generation mechanism converts water into steam to carry the inner tube through the intake pipe, at the humidification in-process of paper web, steam from the through-hole blowout of inner tube and to the interior loss of cavity, treat that the cavity is filled with the back, along with the continuous blowout of steam, the cavity internal pressure improves and makes steam spray to the paper web surface from the opening part, to the even humidification of paper web. Compared with the prior art, the scheme has the advantages that overlapping and blank areas can not exist, and the humidifying uniformity is guaranteed.

In this scheme, the position relation of opening position and through-hole on the inner tube on the outer tube has two kinds: firstly, the through hole is opposite to the opening, the diameter ratio of the pressure of the steam and the outer pipe of the inner pipe needs to be controlled at the moment, the effect that the cavity is filled with the steam firstly and then the steam overflows is achieved, the diameter of the optional outer pipe is 2.2-4.3 times of the diameter of the inner pipe, the steam pressure is controlled to be 1-3Mpa by the control valve, and the steam supplemented into the inner cavity from the through hole and the steam sprayed to the surface of the paper web from the opening form effective circulation; secondly, the through hole is not right opposite to the opening, and at the moment, the effect that the cavity is filled with the steam firstly and then the steam overflows can be achieved without strictly controlling the pressure of the steam and the diameter ratio of the inner pipe to the outer pipe, so that the operation difficulty is reduced.

As an alternative, the through holes are spaced at intervals of 40-50mm and have diameters of 1.5-2.5mm. When the interval and the diameter of the through holes are in the range, the steam output by the through holes is not too sparse, so that the steam cannot be uniformly mixed in the cavity, and the humidification is non-uniform; the pressure in the cavity can not rise too fast because of not being too dense, and the steam can not be sprayed to the surface of the paper web from the opening of the outer tube after being completely and uniformly mixed in the cavity.

As an alternative, the distance between the opening of the outer tube and the paper surface is 40-60mm. At the moment, the width of the steam received by the paper web surface is equal to the width of the opening, the steam can uniformly humidify the paper web surface, and the residual steam can not be splashed due to the overlong distance to influence the recovery of the residual steam.

As an alternative, the width of the opening is 4-6mm, when the width of the opening is less than 4mm, the humidifying efficiency on the surface of the paper web is low, and the production efficiency is influenced; when the width of the opening is larger than 6mm, the steam in the cavity overflows from the opening before being filled, and the aim of uniform humidification cannot be achieved.

As an alternative, the steam generating means is provided with an inlet pipe which is connected to the inner pipe and which delivers steam into the inner pipe.

As an alternative, the steam generating mechanism is provided with a return pipe, and the return pipe is connected with the wall of the outer pipe and communicated with the cavity. The condensed water on the inner surface of the outer pipe is collected along the wall surface and then is guided into the steam generating mechanism through the return pipe, so that the water resource is recycled.

Has the advantages that: the utility model discloses a spraying mechanism that the inner tube constitutes is established to the outer pipe box, and at the humidification in-process of paper web, steam fills with the cavity between inner tube and the outer tube earlier after the through-hole blowout of inner tube, and along with the blowout that lasts of steam, cavity internal pressure improves and makes steam spray from the opening part to the paper web surface, to the even humidification of paper web. Compared with the prior art, the utility model discloses can not have the homogeneity of overlapping and leaving white region, guaranteeing the humidification.

Drawings

FIG. 1 shows a perspective block diagram of a spray mechanism;

FIG. 2 illustrates a top view of a spray mechanism under one embodiment;

FIG. 3 shows a diagram of the cooperation of a spray mechanism with a paper web under one embodiment;

description of reference numerals: the paper web forming machine comprises an outer pipe 1, an opening 11, an inner pipe 2, a through hole 21, a cavity 3, an air inlet pipe 4, a return pipe 5 and a paper web 6.

Detailed Description

The invention is further described with reference to the drawings and the specific embodiments. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. Furthermore, the embodiments of the invention described in the following description are generally only some embodiments, but not all embodiments of the invention. Therefore, all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention.

A paper web spraying and humidifying device comprises a spraying mechanism, a steam generating mechanism connected with the spraying mechanism through an air inlet pipe 4 and a return pipe 5, and a control valve arranged on the air inlet pipe 4.

The spraying mechanism consists of an outer pipe 1 and an inner pipe 2, the whole spraying mechanism is horizontally placed below the paper web 6, the outer pipe 1 is provided with an opening 11 which has a length corresponding to the width of the paper web and faces the surface of the paper web, the opening 11 faces the surface of the paper web, and the inner pipe 2 is provided with a plurality of through holes 21; after the steam is sprayed out from the through holes 21 of the inner pipe 2, the cavity 3 between the inner pipe 2 and the outer pipe 1 is filled, and then along with the continuous spraying of the steam, the pressure in the cavity 3 is increased to promote the steam to be sprayed to the surface of the paper web from the opening 11, so that the paper web is uniformly humidified.

In this embodiment, there are two types of positional relationships between the position of the opening 11 on the outer tube 1 and the through hole on the inner tube: firstly, the through hole 21 is opposite to the opening 11, the diameter ratio of the steam to the outer pipe 1 of the inner pipe 2 needs to be controlled at the moment, the effect that the cavity is filled with the steam and then the steam overflows is achieved, the diameter of the optional outer pipe 1 is 2.2-4.3 times of the diameter of the inner pipe 2, and the steam pressure is controlled to be between 1 and 3Mpa by a control valve, so that the steam supplemented to the inner cavity from the through hole 21 and the steam sprayed to the surface of the paper web from the opening 11 form effective circulation; secondly, the through hole 21 is not right opposite to the opening 11, and at this time, the effect that the steam firstly fills the cavity and then overflows can be achieved without strictly controlling the pressure of the steam and the diameter ratio of the outer pipe 1 of the inner pipe 2, and the operation difficulty is reduced.

In the embodiment, the width of the opening 11 is 4-6mm, and when the width of the opening is less than 4mm, the humidifying efficiency on the surface of the paper web is low, so that the production efficiency is influenced; when the width of the opening is larger than 6mm, the steam in the cavity overflows from the opening before being filled, and the aim of uniform humidification cannot be achieved. The distance between the opening 11 and the paper surface is 40-60mm. At this time, the width of the steam received by the paper web surface is equal to the width of the opening 11, and the steam can uniformly humidify the paper web surface and can not splash due to too long distance.

In this embodiment, the through holes 21 have a spacing of 40 to 50mm and a diameter of 1.5 to 2.5mm.

In this embodiment, an inlet pipe 4 penetrates from the outer pipe 1 and is connected to the end surface of the inner pipe 2, and a return pipe 5 is connected to the wall of the outer pipe 1.

In this embodiment, the steam generating mechanism includes a container having a heating device at the bottom thereof for heating water to generate steam.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

1. A web spray moistening device comprising a spray mechanism located below a web, a steam generating mechanism that continuously outputs steam to the spray mechanism, and a control valve that controls the steam pressure, characterized in that:

the spraying mechanism comprises an outer pipe (1) and an inner pipe (2) arranged inside the outer pipe (1), a cavity (3) is formed between the outer pipe (1) and the inner pipe (2), the inner pipe (2) is connected with a steam generating mechanism, a through hole (21) used for spraying steam into the cavity (3) is formed in the inner pipe (2), the outer pipe (1) is provided with an opening (11) with the length corresponding to the width of a paper web and facing the surface of the paper web, and in a working state, after the cavity (3) between the inner pipe (2) and the outer pipe (1) is filled with steam, the steam is continuously sprayed out along with the steam, and the pressure in the cavity (3) is improved to enable the steam to be sprayed to the surface of the paper web from the opening.

2. A web spray moistening device as claimed in claim 1, characterized in that: the interval between the through holes (21) is 40-50mm, and the diameter is 1.5-2.5mm.

3. A web spray moistening device as claimed in claim 1, characterized in that: the distance between the opening (11) of the outer tube (1) and the paper surface is 40-60mm.

4. A web spray moistening device as claimed in claim 1, characterized in that: the width of the opening (11) is 4-6mm.

5. A web spray moistening device as claimed in claim 1, characterized in that: the steam generating mechanism is provided with an air inlet pipe (4) and a return pipe (5), and is connected with the spraying mechanism through the air inlet pipe (4) and the return pipe (5).

6. A web spray moistening device according to claim 5, characterized in that: the air inlet pipe (4) is connected with the inner pipe (2) and conveys steam into the inner pipe (2).

7. A web spray moistening device according to claim 5, characterized in that: the return pipe (5) is connected with the pipe wall of the outer pipe (1) and communicated with the cavity (3).