SU827666A1 - Convection dryer of webs - Google Patents

Description

Union of Soviet

Socialist

Republic) 827666

USSR State Committee for Inventions and Discoveries

DESCRIPTION

INVENTION IYA

TO AUTHOR'S CERTIFICATE (61) Additional to author. certificate-wu - (22) Declared 09.02.79 (21) 2723349 / 29-12 with application joining - (23) Priority - (43) Published on 05/07/81. Bulletin No. 17 (45) Date of publication of the description 03.08.81 (51) M.Kl. ³ D21 F 5/18 (53) UDC 676.2.052.7 (088.8) (72) Inventors M.D. Lotvinov, Μ. M. Fernov, L. L. Libman,

I. I. Bulgakov, L. I. Rendel, G. G. Chudner, A.’D. Panov and V. M. Pestrikov (71) Applicant Central Research and Design Institute for the Designing of Equipment for the Pulp and Paper Industry (54) CONVECTIVE DRYER OF ROLL MATERIAL

2

The convective dryer is designed to intensify the drying of roll material and can be used in pulp and paper and other industries.

Known convective dryer of roll materials, mainly paper, including a thermally insulated body with a bottom, channels that divert the steam-air mixture, inlet channels with jet pairs and a material-bearing surface [1].

The purpose of the invention is the improvement of aerodynamic characteristics and simplification of manufacturing technology.

This is achieved by the fact that the bottom of the dryer is made of zigzag-shaped sheets connected by jumpers forming the box-shaped supply channels, the sheet jumpers are provided with openings and form channels for removing the vapor-air mixture with the walls of the box section channels, the axes of each jet pair of adjacent supply channels intersecting with the axis of the hole jumpers at a point located on the surface bearing the rolled material.

In FIG. 1 shows a convective dryer, a longitudinal section; in FIG. 2 - bottom of the dryer, section; in FIG. 3 - convective dryer, cross section; in FIG. 4 - installation for the production of roll materials, which includes a convective dryer, type 5 range.

A convective dryer is a thermally insulated casing 1 with a bottom 2 made of sheets of zigzag profile 4 and 5 connected by jumpers 3, forming supply ducts of box section 6.

Inclined walls of the supply channels formed from a sheet of zigzag profile 5 with holes 7 for the exit of hot air to the dried material, form a jet pair 8.

The jumpers 3 are provided with holes 9 and form channels with the walls of the channels of the box section for the removal of the vapor-air mixture. The axis of each jet pair of 8 adjacent supply channels intersect with the axis of the hole 9 of the jumper 3 at a point located on the surface bearing the rolled material (see Fig. 2).

In the center of the casing, a fan 10 with an engine is installed on top. On two opposite sides of the casing there are 1J heaters, under which there are side cavities .12.

An exhaust cavity 13 is formed in the central part of the housing, which communicates with the suction pipe 14 of the fan 10. At the end of the housing there is an air duct 15.

Convective dryer works as follows.

The drying agent (hot air) is pumped by the fan J0 through the heaters 11 into the side cavities 12 of the dryer, fed into the supply ducts of the box section 6, from where it goes obliquely to the surface of the dried material through openings 7.

The resulting steam-air mixture through the holes 9 is discharged into the exhaust cavity 12 of the dryer, then it is taken up by the suction pipe 14 of the fan and again pumped into the supply ducts 6. Excess steam-air mixture is discharged into the atmosphere by the air duct 15.

Claims (1)

In the central part of the housing, an exhaust cavity 13 is formed, which communicates with the suction inlet 14 of the fan 10. There is an air duct 15 in the end of the housing. The convective holder works in a similar manner. The drying agent (hot air) is blown by the fan 10 through the heaters // into the side cavities 12 of the desiccant, fed into the supply channels of the box section 6, from where it passes through the holes 7 gently to the surface of the existing material. The vapor-air mixture formed through the openings 9 is withdrawn into the exhaust cavity d2 of the dryer, then taken up by the suction nozzle 14 of the fan and re-injected into the supply channels 6. The excess of the vapor-air mixture is vented to the atmosphere with an air duct i / 5. Formula invented Convective roll-on material drying dryer, mainly paper, including 2 J 7- Cywu / iuu Momeflvai Nopra eng / e .f C / U / UftOZO / fff / 77ef7l / iy / fa FIG. I / J G, ii. A heat-insulating body with a bottom, a channel that diverts the vapor-air mixture, supply channels with jet pairs and a roll bearing material surface, characterized in that, in order to improve the aerodynamic characteristics and simplify the manufacturing technology, the bottom of the drying edge is made of zigzag sheets connected by jumpers. profiles forming box feed channels, sheet lintels are provided with openings and form channels for removal of steam-air mixture with the walls of box section channels and, the axes of each jet pair of adjacent supply channels intersect with the axis of the opening of the bridges and at a point located on the carrier web material. The source and information taken into account during the examination: 1. French Patent No. 1154765, D 21 F 5/00, 1975. KoHSEffmi / SHb / ij cffu / / me / S Cy-aufib / u ffy / T / effi / a / Os & ED /: