SU850146A2 - Noutch filter - Google Patents

Description

(54) NUTCH-FILTER

The invention relates to filtration, namely, a suction filter for separating suspensions, preferably with a low content of amorphous precipitates, and can be used in the chemical industry. According to the main auth. N 383454 is known an i-fi interface comprising a housing with a bottom, a B connector between which a filter partition is installed, made in the form of a grid. A part of the body, located above the filter septum, is hollowed out with holes and is equipped with a vacuum chamber. The cavities of the bottom and the vacuum chamber are supplied through pipes to the filtrate drain line (11. However, when such a filter is operated, the level of suspension in the apparatus must be maintained constantly above the vacuum chamber, so the perforated portion of the housing decreases to the filtering part of the housing due to the air penetration into the holes in the lateral surface of the filter housing, the pressure in the vacuum chambers rises and the speed of the filters decreases sharply. This requires constant monitoring of the process filtering. In addition, only a part of the body is provided with holes, it is not fully used for filtering the side surface of the filter body. The IsoTine chain is an increase in reliability of operation, and it is possible to filter the suspension through the side and horizontal surfaces without changing the vacuum in the chambers in case of level of the solution along the height of the filtering body of the suction filter and an increase in the filtering surface. This tsesh is achieved by the fact that the filter is a hollow ring element, Kolxia; n | BUT, which is installed in the cortus above the previous partition with a partition on the upper level of the porous body. In addition, the ring is equipped with a flange mounted on its upper end. The drawing shows the suck-fklGr, general view.

The night filter comprises a housing I with a bottom 2, in the connector between which a filter septum 3 is installed, made in the form of a lattice covered with filter cloth or paper. A part of the body up to the upper edge above the horizontal filter partition 3 is made with holes, covered with filter cloth or paper and equipped with a vacuum chamber 4. Inside the body 1, a hollow element 5 in the form of a cylinder (or a cylindrical body) is coaxially mounted, forming a chamber 6 with a collar channel 7 for the passage of the suspension from the bottom, at the top, the element 5 is tightly connected to the housing 1 by a flanged connector. It is advisable that the lower part of the element 5 and the non-opening part of the body located between the side and horizontal filtering surfaces, B3ai} MHO, be overlapped in height, as shown in the drawing.

The cavities of the bottom 2 and the vacuum chamber 4 are connected by means of nozzles 8 and 9 to the vacuum line for draining the filtrate. To clean the side filtering surface of the casing from the sediment, the chamber 4 is provided with a nozzle 10 for supplying air, filtrate or water under pressure.

During the period of operation, the initial suspension enters the filter housing and fills it up to the upper edge of the housing. Under the influence of vacuum, the suspension enters the chamber 6 and when passing through the filtering material 4, the openings of the horizontal filter partition 3 and the lateral surface of the housing 1, the solution is cleaned of precipitation and enters the cavity 2 and chamber 4, respectively, and through the nozzles 8 and 9 of the vacuum line of the filtrate drainage into the collector (not shown). As the filtration rate decreases, the suspension supply is stopped and sion in the housing 1 reaches the lower edge of element 5, perekrgoayut closure at the nozzle 9, and part ostavschuyus dofiltrovyvayut slurry through a horizontal partition 3.

In the process, through the side surface of the suction filter, the main mass of the solution, clarified due to a considerable part of sediment falling out of it onto the horizontal partition 3, is cleaned. The sediment located on the side filtering surface can be removed by supplying air under pressure to the chamber 4, cleaned

filtrate or water through the pipe 10.

The direction of gravity and the movement of the filtrate inside the plug-in element with respect to the horizontal filter septum coincide, and in the chamber between the body

and the plug-in element varies in height perpendicular to the opposite. Because of the height of the side filtering surface, the thickness of the sediment layer, and hence its resistance, decreases from

bottom of the casing to the top, and the filtration rate increases.

The use of the proposed Nutsche filter will improve the reliability of operation, provide the possibility of continuous filtering.

slurry through the side and horizontal surfaces of the filter in a large fluctuation of the slurry level across the entire height of the filtering part of the housing, up to the lower edge of the insert, increase the filtering surface by about 10-15% and increase the filtration rate.:

Claims (2)

Formula and the formula . Night filter on auth. No. 383454, which means that, in order to increase the reliability of the operation and to enable the suspension to be filtered through the side and horizontal surfaces in case the suspension level fluctuates along the entire height of the filtering part of the housing, the filter is provided with a hollow element coaxially installed below the horizontal partition the upper level of the perforated part of the body. 2. A net filter, characterized in that the annular element is provided with a flange mounted on its upper end. Sources of information taken into account in the examination 1. USSR author's certificate N «383454, cl. B 01 D 29/04, 10.03.71.