RU162039U1 - FILTER - Google Patents

Abstract

1. A filter comprising a storage hopper, in which discs are mounted at intervals and rotatably on a horizontal shaft, on which filter elements are attached, flushing nozzles located on the inlet side of the filter elements, the supply and exhaust filtrate pipelines, characterized in that additional filtering elements are introduced into it, disks are arranged in pairs with the formation of cavities between them, filtering elements are located on the outer sides of each pair of disks, additional filtering The measuring elements are located on the inner sides of each pair of discs, the ratio of the hole sizes of the filtering elements on the outer and inner sides of the pair of discs is 1: 20-1: 25, the horizontal shaft is hollow, the openings are made in it, open in the cavity between the discs of each pair, and connected to the filtrate discharge pipe, the source drain pipes are open in the cavity between the pairs of disks. 2. The filter according to claim 1, characterized in that the filtering elements and additional filtering elements are made of a solid filter cloth.

Description

The invention relates to equipment for separating suspended solids from liquids, in particular to storage bins, and can be used to dewater the pulp.

A known filter for separating suspended solids from liquids, containing storage bins, clarified water chambers, a shut-off device for condensed slag discharge and pulp supply pipelines, in which each storage bunker is equipped with a drainage disk filter mounted in the lower part of the hopper perpendicular to the inclined surface, and locking device. The filter can be equipped with a purge unit. (RF patent 2014289, Ml. C02F 11/12, publ. 06/15/1994).

In this device, in the settling hoppers, the accumulation of sediment slag pulp. Slag, having a high density, settles on the pyramid-shaped bottom of the hopper. Water is drained through the top of the hopper, and slag sediment fills the hopper. When the hopper is full of sludge, the pulp is stopped. Slag, having a glassy structure, easily gives off moisture, so it’s enough to open the hole in the lower part of the hopper, which lets only water through, as it exits from the hopper by gravity. Only then is slag produced. The filter during operation of the device may become clogged with slag particles, it is cleaned by blowing after each cycle.

The disadvantages of this technical solution are low productivity and frequency of operation, which leads to the need to increase the overall dimensions of the device, to increase the number of settling storage bins for a given capacity, and also limits the possibility of use, since the sediment must have a glassy structure.

Closest to the proposed technical solution is a filter containing a storage hopper, in which disks are mounted on the horizontal shaft at intervals, one after another, to rotate the disks, on which filtering cloths, feed and discharge filtrate pipelines are connected, connected to different sections of the hopper drive, flushing nozzles located on the inlet side of the filter elements that wash out the growth on the filter material. (U.S. Patent Application US 20140124461, Ml. B01D 33/50, B01D 33/804, publ. May 08, 2014)

The disadvantage of this technical solution is the possibility of sediment getting into the filtered liquid, since the filtrate is drained and the infiltrate is removed from one storage bin.

The technical problem solved by the proposal is to improve the quality of the filter.

The technical result of the proposal is to improve the quality of fluid filtration.

To solve this technical problem, a filter is proposed that contains a storage hopper in which discs are mounted at intervals and rotatably on a horizontal shaft, on which filter elements are fixed, flushing nozzles located on the inlet side of the filter elements, the source drain and filtrate discharge pipelines, the disks are arranged in pairs with the formation of cavities between them, the filter elements are located on both sides of each pair of disks, the size ratio of the holes of the filter elements nt on the outer and inner sides of the pairs of disks is 1:20 - 1:25, the horizontal shaft is hollow, the holes are made in it, open in the cavity between the disks of each pair and connected to the filtrate discharge pipe, the source drain pipelines are open between the pairs drives.

The proposed filter can be manufactured on existing equipment from known materials. The applicant did not find other technical solutions of a similar purpose with similar essential features when conducting a search in scientific and technical literature and patent documentation. Therefore, the applicant believes that the proposal for this application meets the eligibility criteria of the utility model “novelty” and “industrial applicability”.

The essence of the utility model is illustrated by drawings of a non-exclusive example of filter execution. The figures show various sections of the filter.

In the figures, 1 — storage hopper, 2 — horizontal shaft, 3 — intervals between discs 4 forming cavities 11, 5 — filter elements, 6 — flushing nozzles, 7 — inlet sides of filter elements, 8 — feed source supply pipelines, 9 — 9. - a pipeline for removal of clean filtrate, 10 - additional filtering elements, 11 - cavities, 12 - holes of a horizontal shaft, 13 - a cavity of a horizontal shaft, 14 - a pipeline for supplying washing water, 15 - a drive, 16 - a pipeline for removing washing water, 17 - supports. The filtering elements 5 are made in the form of solid webs with holes of 5 μm, mounted on the input sides 7 of the disks 4, additional filtering elements 10, are also made in the form of solid webs with holes of 100 μm and are fixed on the output sides of the disks 4.

The device operates as follows

Water for filtration is directed through the pipelines 8 for supplying the initial drain to the storage hopper 1 in the intervals between the pairs of disks 4 forming the filter disk chambers 11, passes through the filtering elements 5 fixed on the input sides 7 of the disks 4, additional filtering elements 10, which are fixed on the output sides of the disks 4, into the filter disk chambers 11. Through the openings 12 and the cavity 13 of the hollow horizontal shaft 2, the filtrate is discharged through the filtrate discharge pipe 9 by gravity or pressure of the suction pump (not shown). The disks 4 remain motionless. Suspended substances accumulate on the outer surface of the filter elements 5. When, as the filter elements 5 become dirty, the water level in the tank 1 rises, the horizontal drive 2 rotates 15, drives the horizontal shaft 2, on which the disks 4 are located, and rinse water is supplied under pressure through the pipe 14 for supplying washing water to the washing nozzles 6. Water jets from the nozzles 6 wash off the accumulated sediment from the inlet sides 7 of the filter elements 5 into the piping 16 for the removal of washing water. For washing, use a purified filtrate (up to 5%) of the total flow rate with constant washing, supplied to the nozzles 6 by a pump (not shown) under a pressure of up to 7 atm. Since the additional filtering elements 10 are made with holes (pores) of 100 μm, they grow many times slower than colonies of bacteria that carry out biological treatment of water and practically do not create pressure differences. Therefore, additional filter elements 10 are washed only once every six months or a year when servicing the device.

The movement of water in the device at nominal conditions occurs by gravity, without pumping equipment for pumping purified water. However, as the filter elements 5 (filter cloth) become dirty, pumping equipment can be used to pump purified water. In this case, a vacuum is created in the pipe 9 of the drain of the clean filtrate and in the horizontal shaft 2, which increases the filtration rate, the adhering suspension serves as an additional filter layer and can increase the degree of purification, below 5 microns.

The filter device allows you to make it in the form of a modular design and use flocculants to reduce the phosphorus content in the filtrate to 50%.

The applicant manufactured and tested prototypes of the proposed filter with the following specifications

Productivity is 2500 m3 / h, the filter cloth is polyester, there is no contact of the initial effluent with the filtrate and there is no need to prepare or supply washing water from the outside, reliable observance of the cleaning quality of less than 5 mg / l at the outlet, maximum hydraulic losses of less than 30 cm, exclusion from the filtrate eggs of parasites.

Although the present proposal has been demonstrated and described with reference to an embodiment thereof, it will be understood by those skilled in the art that various other changes may be made to it regarding materials, shapes and details, without departing from the essence and scope of this technical solution, as defined below. the formula.

Claims (2)

1. A filter comprising a storage hopper, in which discs are mounted at intervals and rotatably on a horizontal shaft, on which filter elements are attached, flushing nozzles located on the inlet side of the filter elements, the supply and exhaust filtrate pipelines, characterized in that additional filtering elements are introduced into it, disks are arranged in pairs with the formation of cavities between them, filtering elements are located on the outer sides of each pair of disks, additional filtering The components are located on the inner sides of each pair of discs, the ratio of the hole sizes of the filter elements on the outer and inner sides of the pair of discs is 1: 20-1: 25, the horizontal shaft is hollow, holes are made in it, open in the cavity between the discs of each pair, and connected to the filtrate discharge pipe, the source drain pipes are open in the cavity between the pairs of disks. 2. The filter according to claim 1, characterized in that the filtering elements and additional filtering elements are made of a solid filter cloth.

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