RU2349366C1 - Filtering element - Google Patents

Abstract

FIELD: water treatment.

SUBSTANCE: invention relates to filtration for the removal of mechanical impurities from liquids and gases. A filtering element comprises a holed frame with a filtering baffle formed by spiral wound wire being mounted on its surface. The frame is cone-shaped, the holes are made on its generating surface as inclined spiral slots, two wire layers are wound over the holes. The first winding layer forms the first filtering baffle controlling the filtration rating while the second winding layer forms the second filtering baffle providing for prefiltration and protection of the first baffle from abrasive wear and mechanical damage.

EFFECT: improving operation characteristics along with increasing filtration capacity and operational reliability of the element.

1 dwg

Description

The present invention relates to the field of filtering for the purification of liquids and gases from mechanical impurities.

A device of a filter element is known that contains a hollow perforated frame in the form of a cylinder, on the outer side of which a coil is wound to a coil of wire, on the surface of which protrusions and recesses are located at a certain distance, forming filter slots filled with mineral powder (copyright certificate No. 986454, 01/01/1983 , IPC B01D 29/48).

Closest to the proposed device is a filter element containing a tubular frame with perforation in the form of longitudinal slots, on the surface of which there is a filter membrane formed by spirally wound thread (RF patent No. 2232620, July 20, 2007, IPC B01D 29/48).

However, the known device has low operational reliability.

The technical result of using the proposed device of the filter element is to increase the technical and operational characteristics while increasing the productivity of the filtering process and the operational reliability of the device of the filter element.

To implement the technical result, a filter element device is proposed, comprising a frame with perforation in the form of slots, on the surface of which a filter membrane formed by spirally wound wire is placed. In this case, the frame has a conical shape, along the generatrix of which the perforation is made in the form of oblique-spiral slots, and two layers of wire winding are placed on top of the perforation. In this case, the first layer of wire winding forms a filtering wall, which determines the fineness of the filtering process, and the second layer carries out preliminary filtering, protects the first layer from mechanical damage, providing a washing process of the filtering element with a counter flow of the filtered medium.

 The drawing shows a diagram of the proposed filter element, where 1 is the frame of the filter element, 2 is the perforation on the frame in the form of oblique-spiral slots, 3 is the first layer of wire winding on the frame, 4 is the second layer of wire winding on the frame.

The proposed device of the filter element consists of a cone-shaped frame 1 (the taper angle is from 5 to 45 °). Perforation in the form of oblique-spiral slots 2 is made along the generatrix of the carcass surface, which increases the area of the filtration partition and increases productivity, i.e. volume of filtered medium per unit time. In this case, the conical shape of the frame provides effective removal of filtering sediments formed on the surface of the filter element. To improve the quality of the filtering process, two layers of corrosion-resistant wire (for example, stainless steel - 03X18H10T) were wound on the surface of the filter element.

The first filter layer of the wire winding on the frame 3 forms a filter membrane that determines the fineness of the filtering process.

The second layer of wire winding 4 performs the following functions: pre-filtering the filtered media, protecting the first layer of the wire winding from mechanical damage, abrasion, and provides a process for washing the filter element with a counter flow of the filtered medium.

As a result of the above functions of the second layer of wire winding, the technical and operational characteristics of the filter element, such as the performance and operational reliability of the device, are significantly increased.

In addition, the diameter of the wire of the first layer is from 10.0 to 100.0 μm, and the diameter of the wire of the second layer is 2-10 times the diameter of the wire of the first layer.

The work of the proposed device

The process of the proposed device is as follows: the filtered medium, passing sequentially through the second and first layer of the wire winding, is cleaned of mechanical particles and impurities. During the filtering process, a gradual contamination of the filtering layers of the filtering element by filtered mechanical particles and impurities occurs, which leads to a decrease in filtering performance. To restore the technical and operational characteristics of the device, the filter element is flushed with an oncoming flow of the filtered medium. In this case, the filtered medium is directed into the internal cavity of the filter element. As a result of this process, the filtered medium, sequentially passing the first and second layer of wire winding, removes filter cake deposited on their surface, which, for example, is removed into the storage tank.

Due to the conical shape of the filter element and inclined-spiral slots on its surface, the washing process allows you to restore the original filtration ability of the filter element by 90-95%. After the washing process of the filter element, the filtered medium from the inner cavity of the filter element is sent to the second and first filter layers of the wire winding. Thus, the process of filtering liquid or gaseous media, i.e. the operation of the proposed device is cyclical in nature, namely the filtration cycle and the washing cycle of the filter element.

Information sources

1. Auto USSR No. 986454 dated January 7, 1983, IPC B01D 29/48.

2. RF patent No. 2232620 C1 of November 14, 2002, IPC B01D 29/48.

Claims (1)

A filter element comprising a frame with perforation, on the surface of which there is a filter baffle formed by spirally wound wire, characterized in that the frame has a conical shape, perforation is made along its forming surface in the form of oblique-spiral slots, and two layers of wire winding are placed on top of the perforation wherein the first layer of wire winding forms a first filter baffle that determines the fineness of the filtering process, and the second layer of wire winding forms a second filter uyuschuyu partition which provides pre-filtering and protecting the first filter septum from abrasion and mechanical damage.