SU961567A3 - Device for dehydrating webs of fibrous materials - Google Patents

Abstract

The unit to extract water from a fibrous web, such as in paper making, using paired pressure rollers or pressure plates, has a loose felting layer inserted between the meshed sieves and the pressure bodies. Pref. there are grooves on the outer surface of the pressure rollers in the running direction of a continuous mesh. The meshes and the grooves have about the same capillary suction level, while the felting layer has a capillary suction level which is 10-1000 times greater than that of the meshes and grooves. The design allows the capillary diameter to be increased at small capillary volumes at the separating layer between the filter cakes and the covering.

Description

The invention relates to the textile industry. namely, devices for dewatering fibrous webs.

A device for dewatering fibrous material webs is known, comprising two pressure rollers arranged one above the other with a gap for material passage and having radial channels, and two felt webs, each of which is in contact with a corresponding pressure roller and is located symmetrically with respect to the direction of movement of the web 1.

A disadvantage of this device is insufficient dehydration of the material webs.

The aim of the invention is to increase the efficiency of dewatering.

This goal is achieved by the fact that a device for dehydrating cloths made of fibrous materials., Containing two pressure pads, arranged one for the other f.)) 1m

for the passage of material and having radial channels, and two felt webs, each of which is in contact with a respective pressure roller and 5 is located symmetrically with the direction of movement of the web, also has two mesh webs in contact with the felt webs, and the mesh webs and pressure rollers have

10 is the same capillary suction height, and the capillary suction height of the felt webs exceeds the capillary nature of the mesh webs or pressure rollers 10-100 times.

15 In FIG. 1 shows the proposed device, a general view; in fig. 2 - the same cross section; in fig. 3 is a capillary circuit of a dewatering device.

20 The device comprises two pressure rollers 1 and 2 arranged one above the other with a gap for the passage of material. Felt l and 5 are located symmetrically with respect to the direction of movement of the blade 3.) E

39615674

of which is in contact with the corresponding- the proposed device is significant

This pressure roller 1 or 2. Sno increases the efficiency of dewatering cloths A and 5 contact. netting the webs 6 and 7. Mesh webs 6 and 7 and pressure rollers 1 and 2 5

Claims (2)

have the same capillary height. The invention claims suction, and the capillary suction height of felt cloths A and 5 is a pre-treatment unit. The dewatering device increases the capillary nature of the mesh floor of fibrous materials, hundreds of 6 and 7, or pressure rollers 1 and 2, two supporting rollers, 10-100 rasp time. The felt webs k laid one above the other with a gap 5 are guided by the rollers 8 and 9 and the net for the passage of material and having the radial webs 6 and 7 - by the rollers 10 and the channels and two felt webs 11. Felt blades and 5 and netting, each of which is in contact (left blades 6 and 7 are in contact with each other 15c with a corresponding pressure roller and with the other only within the limits of the action of the press is located symmetrically with respect to the connecting rollers 1 and 2. Spots 1 and 2 have 12l radial channels, so that, with a price of 13. to increase the efficiency of dehydration, by means of a strong pressure on the 20th century, it has two mesh polotkazyvaemye pressure rollers 1 and 2, on the contact with felt canvas 3 y water is squeezed, while the mesh sheets and namyayutsya in the capillaries to the outside, where the pressure rollers have the same surface as the mesh sheets 6 and 7, the suction height of the capillary, and the capillary masks J and 5 and the suction height of 25 through channels 12 and 13 of pressure val-blades exceeds the capillary nature of the nets 1 and 2. Re-suction of water, chatting cloths or pressure rollers located in the pores of felt polo 10-100 times. ten and 5j in sheet 3 is prevented by decompression at the exit from the zone. Sources of information pressing the gap through the capillaries are taken into account during the examination of the diameter, but a small volume of network 1. Copyright certificate of the USSR. No. 255128, cl . F 2b On 13/04, 1968.