SU1704813A1 - Filtering plate of thermoplastic material - Google Patents

Abstract

The invention relates to thermoplastic filter plates and allows an increase in power while decreasing the dimensions. The filter plate consists of douh symmetrical half-shells 1. rigidly connected in place of a planar joint, for example by means of ultrasonic welding, expanding on the sides to form a hollow shaped profile 2 filled with polyurethane rigid foam. In the middle of the half-shell 1, there is a hole in which a two-part ointment fastener 4 is mounted, which holds the filter cloth 3. The screw fastener has a feed hole 5 through which the filtered suspension enters the filtration chambers 6. The drain channel 7 of the semicircular profile is provided in place transition of the shaped profile 2 to the base of the slab, and transverse holes 8 emerge from the drainage channel 7 for unhindered drainage of waste water. 1 hp f-ly. 2 Il. ate with mj 4J O Ј CO -4 04

Description

And jjjprTenno refers to filter thermoplastic pl re for filter presses, for example, day ceramic ceramic suspensions; -; i, sludge wastewater and others that are used in the rj ceramic industry.

A filter plate consisting of profiled, perforated, stacked other DRUZ sheets. connected by means of BINT mounting of filtering fabric between the sheets, forming cavities for the drain of the hearth. The peripheral edges of the sheets are designed in the form of trays, and a ring made of an elastic material is placed in the half-chambers formed by such an orbit (German Patent No. 827351, class 12 d 5/01. 1941).

The disadvantage of this solution is the relatively high production costs of perforated and profiled sheets, and the implementation of these filter plates in practice has not become known. The probability of the formation of variously large filter plates is caused by the geometry of the sheets and the associated differential pressures between the chambers.

A filter plate is known, consisting of two plane-arallel sheets, which are maintained by means of elastic inner and outer rings. The inner ring has radial holes through which the suspension is fed into the cavity formed by the sheets. The hydrostatic pressure inside the filter plate arising during the filling of the filter press compensates for differential pressures (GDR patent No. 73759. class 12 d 9. 1970).

The suspension in the cavity, with holdings during pressing at several hours, will mix and, therefore, after one or several pressing processes, the principle of action can no longer occur.

The closest in technical essence and the achieved result to the proposed one is a thermoplastic filtering plate, for example, polypropylene. consisting of a base and a shaped profile (GDR patent N: 129373. CL E 01 D 25/12, 1935). However, the known solution provides the necessary strength of the filter plates with a lack of homogeneity, as well as the fracture of such filter plates is very high.

The purpose of the invention is to increase the power while reducing the size.

FIG. Figure 1 shows the filter plate, extended: incision; nl figure 2 - "MD And on fg.1.

Filter plate composed of two

symmetric half-shells 1. The latter are transformed by a thermoplastic method in the form and thus an outer contour corresponding to the filter plate is obtained. The material used is a mineral-reinforced polyvinyl chloride sheet material with a thickness of 5-8 mm. The sides of the half-shells 1 facing each other have a smooth surface in the filtering zone and are rigidly connected (welded) at the place of a planar connection by welding, for example ultrasonic welding. On the sides of the half-shell 1 are expanded and form the corresponding hollow shaped profile 2, which

For its part, it is filled with polyurethane rigid foam. Thus, the filter plate gains sufficient strength. For reasons of high dimensional accuracy, the filling of the hollow shaped

profile 2 with foam is carried out in a suitable foam making tool. In the middle of the half-shell 1 is made with a hole in which is mounted a two-part screw fastening

4 holding filter cloth 3.

This screw fixture has a feed hole 5 through which the filtered suspension enters the filtration chambers 6. At the junction of the shaped profile 2 into the base of the plate is placed the drain channel 7 of the semicircular profile, made already during the hot deformation of the half-shells 1. The waste channel 7 has an exit t transverse holes 8 for unimpeded flow of waste water,

Claims (2)

1. A thermoplastic filtering plate consisting of a base and a shaped profile, characterized in that. what with the purpose increase in power with decreasing dimensions, the plate is made of two symmetrical half-shells of mineral-reinforced polypinyl chloride material, welded in the place of a planar junction, mainly by ultrasonic welding, while the plate is provided with polyurethane rigid foam placed inside the profile. 2. The stove according to claim 1. Thank you so much for that. what is done ;; the drainage channel of the semicircular profile with transverse rings leaving it, while the drainage channel is located at the transition of the shaped pro / m to the base of the slab. hp No im i j / i and L  ; Gt7g GGt;.: 5.:g- lig; 2: X- :: 7 eight and Ф Ј $ ЈЈ && ®ig.1