RU2230596C2 - Filter for purification of liquid - Google Patents

Abstract

FIELD: filters for purification of liquids from suspended substances.

SUBSTANCE: the invention presents a filter intended for purification of liquids from suspended substances, coloration, turbidity, ions of heavy metals, an ammonium, oil products. The filter may be also used at the solution of problems of preservation of the environment. The filter for purification of liquids contains a housing, branch-pipes for delivery and withdrawal of liquids, branch-pipes for feeding of regeneration solutions, the fixed partitions executed from geotextiles with density of 50-150 kg / m³ and a located between them layer of a sorption-filtration material made on a base of granulouse zeolite with fineness of granules of 2-4 mm. In the capacity of the regeneration solution they use sodium chloride with concentration of 2-10 %. The filter ensures high efficiency of purification of a liquid, has a simple design and capability to work in purification and regeneration modes.

EFFECT: the invention ensures high efficiency of purification of liquids, has a simple design and purification and regeneration modes of operation.

1 dwg

Description

The invention relates to a device for cleaning liquids from suspended solids, color, turbidity, heavy metal ions, ammonium, petroleum products and can be used in solving environmental issues.

A device for cleaning solutions containing a housing, nozzles for supplying the source liquid and draining the filtrate, support perforated plates with filter material placed between them (AC 1613139 USSR, class B 01 D 39/00).

A disadvantage of the known device is the lack of efficiency in cleaning liquids from suspended solids, heavy metal ions, due to the use of flexible nets as perforated plates, as well as filter material with insufficient sorption capacity.

The closest in technical essence to the claimed device is a sorption filter selected as a prototype, comprising a housing with two nets placed in it in layers with alternating coarse and fine fractions with a sorbent based on zeolite, nozzles for supplying and discharging the liquid to be cleaned (floor mod. No. 15174 , 01 D 24/00, published in BI No. 27, 2000).

The disadvantage of the prototype device is the low efficiency of wastewater treatment with a high concentration of suspended solids.

The technical result of the invention is to increase the cleaning efficiency, providing high dirt capacity and performance of the sorption-filtering material.

The essence of the invention lies in the fact that the filter for cleaning liquid, containing a cylindrical body with nozzles for supplying and discharging liquid, the upper and lower fixed partitions installed in the housing, and a layer of sorption-filtering material based on zeolite placed between them, is equipped with nozzles for supplying regeneration solutions, fixed partitions are made of geotextile material with a density of 50-150 kg / m ³ , and the layer of sorption-filtering material is made of granular zeolite.

The use of geotextile material with a density of 50-150 kg / m ³ as fixed partitions provides a high degree of purification of liquid from suspended solids due to the presence of a homogeneous structure of synthetic fibers with a pore size comparable with the size of suspended particles penetrating into them, which practically prevents the flow of suspended solids into the area of location of the sorption-filtering material increases the duration of the filter cycle and the dirt capacity of the filter.

Granular zeolite loading with a granule size of 2-4 mm has several advantages compared to zeolite crushed to a certain size, namely:

- high adsorption ability;

- open porosity;

- sufficient specific surface area;

- mechanical strength;

- heat resistance.

This fact predetermines the high efficiency of their action when cleaning liquids from ions of heavy metals, ammonium, color, turbidity, and petroleum products.

The supply of regeneration solutions, carried out through nozzles located on the housing, ensures the cleaning of the sorption-filter load and geotextile material from contaminants and extends the filter life.

The drawing shows a structural diagram of a filter for cleaning liquid. The device comprises a housing 1, nozzles for supplying the initial liquid 2, for discharging the filtrate 3, for supplying solutions for regeneration 4, 5, a layer of sorption-filtering material 6, located between the fixed partitions - the upper 7 and lower 8, a pipe 9 connected to a liquid injection 10 The valves 11, 12 are located in the upper and lower parts of the pipeline 9. The nozzle for supplying the liquid to be cleaned is connected to the drainage channel 13, in which the valve 14 is mounted. The drainage nozzle 3 is connected to the channel 15, in which valve 16, nozzles for supplying solutions to the regeneration filter are connected to channels 17, 18, in which there are valves 19, 20.

The upper part of the pipeline 9 is connected to the reservoir 21, into which the sodium chloride solution enters for regeneration through the valve 11. The regeneration solution is supplied from the reservoir 21 through the nozzle 22. The fluid injection pipe 10 is equipped with a valve 23.

The device operates as follows.

In the cleaning mode, valves 19, 11, 14 are closed, valves 23, 12, 16 are open. The liquid through pipelines 10, 9 through the nozzle 2 enters the lower partition 8, passes through a layer of sorption-filtering material 6, the upper partition 7, is directed to the outlet of the filtrate 3 and is removed from the filter through channel 15. Suspended substances contained in the liquid, heavy ions metals, ammonia, petroleum products are retained by fixed partitions made of geotextile material and sorption-filtering loading from granular zeolite. This achieves a cleaning efficiency of 85-98%.

During regeneration, a solution of sodium chloride is used.

In the sodium chloride regeneration mode, valves 12, 19, 16 are closed, valves 23, 11, 20, 14 are open.

A regeneration solution of sodium chloride with a concentration of 2-10% comes from pipeline 10, goes through pipeline 9 to reservoir 21, from where it enters through pipe 18 through duct 18 to channel 4. The sodium chloride solution is supplied at a speed of 4 m / h for 18-20 hours, which is regulated by valve 20. At the same time, almost complete removal of heavy metal ions, ammonium from the zeolite load and restoration of its adsorption capacity is achieved.

The inventive device provides high efficiency of liquid purification from suspended solids, color, turbidity, heavy metal ions, ammonium and has a simple design, the ability of the filter to work in cleaning and regeneration modes, which ensures ease of maintenance.

Claims (1)

A filter for cleaning liquid, comprising a cylindrical body with nozzles for supplying and discharging liquid, upper and lower fixed partitions installed in the housing, and a layer of sorption-filtering material based on zeolite placed between them, characterized in that the housing is equipped with nozzles for supplying regeneration solutions , the fixed partitions are made of geotextile material with a density of 50-150 kg / m ³ , the layer of sorption-filtering material is made of granulated zeolite with a particle size of 2-4 mm, and as reg irrational solution using sodium chloride with a concentration of 2-10%.