RU182087U1 - FILTER FOR SEWAGE TREATMENT FROM MOLYBDENUM IONS - Google Patents

Abstract

The invention relates to devices for treating water, in particular, to devices for treating industrial wastewater from molybdenum ions. Such devices can be used in wastewater treatment facilities of the mineral resource complex.

A filter for treating wastewater from molybdenum ions, consisting of a housing with inlet and outlet, limited to two layers of filter material. The case is made in the form of a cylindrical tank and is rigidly fixed to the support, technological holes are made in the lower part of the tank through which a pipe made of chemically resistant polyethylene, for example a two-layer corrugated pipe, at the end of which a universal adapter of chemically resistant low pressure polyethylene with rubber gaskets is installed, as filter materials, pre-treated metal waste from unalloyed steel with a specific surface area of 20 to 50 cm ² / g, for example, oxidized unalloyed steel shavings, and quartz sand with a particle diameter of 1 to 2 mm in a ratio of 1: 2.5 by weight, a stand is fixed on the lid of the cylindrical tank, on which is mounted using bolted connections a sandblasting pump connected to a sandblasting tank and an airlift located in the thickness of the tank, equipped with a funnel with a grill, and to the sandblasting device from both devices can be used for wastewater treatment of mineral resources.

Description

The invention relates to devices for treating water, in particular, to devices for treating industrial wastewater from molybdenum ions. Such devices can be used in wastewater treatment facilities of the mineral resource complex.

A known filter for the treatment of natural and wastewater (patent SU No. 1805993, publ. March 30, 1993), the essence of which is that before the purified water is fed to the filter in the direction from top to bottom in the upper part of the charge, comprising 0.05- 0.6 layer heights, profiled elements are placed, the sections of which are made by decreasing wedges, and after contamination of this part of the load, profiled elements are removed and the filtering process continues until the end of the filter cycle.

The disadvantage of the filter is the inability to use it for wastewater treatment with a high content of heavy metals, as well as the significant duration of the proposed filter cycles.

A known filter for water purification (patent RU No. 2043166, publ. 09/10/1995), which includes sequentially connected cassettes with activated carbon and ion exchanger, nodes for supplying contaminated and discharging purified liquid, an electrical circuit with electrodes, and the cassettes are placed in a common housing, moreover, the ion exchanger cassette is equipped with a nozzle for supplying a regenerating medium, and the activated carbon cassette is made of a rectangular shape of dielectric material and is equipped with longitudinal dielectric partitions separating it into insulated cells E, clamped in an alternating sequence in opposite walls of the cassette, wherein the inside of these walls has electrodes interrupted at the trapping partitions.

The disadvantage of the filter is the high energy consumption for the regeneration of activated carbon and cation exchange resin and the inability to use the filter for industrial conditions.

A known filter for the treatment of natural and wastewater with a downward flow of liquid (patent RU No. 2262374, publ. 10/20/2005), including a housing, a granular filter load, a drain load, a distribution and prefabricated system, a grill, separation nets, also granular the filter load has two successive layers, the first of which contains a mixture of conductive electropositive and electronegative particles in a ratio of 10: 1, the second is made of anthracite with a ratio of layer heights 1: 3, while the top Thread separator protective mesh is made of iron or aluminum, and an interlayer isolation mesh is made of copper, and in the upper part of the housing is an air valve. As electropositive particles used graphite, coke or carbon-containing waste.

The disadvantage of the filter is the design complexity, the regeneration process or filter life is not described, as well as the efficiency of cleaning from high concentrations of heavy metals.

A known filter for the treatment of natural and wastewater (utility model patent RU No. 149629, published January 10, 2015), including the lower and upper tiers separated by a perforated partition, distribution and prefabricated system, supporting layer and granular filter material, distribution system air, located between the tiers, while in the filter material of the lower tier there are rod electrodes of electropositive and electronegative material, forming alternating rows, all electrodes of the same polarity connected by a current lead, the filtering material of the upper tier is made of a metal complex catalyst AOK 7541 of a fraction of 3 mm, the lower tier is of a granular filtering material of silicified calcite of a fraction of 2-5 mm, characterized in that in the catalytic material of the upper tier there is an additional electrode system identical to the system of electrodes of the lower tier .

The disadvantage of the filter is the high energy consumption of the catalyst, high air consumption and the ability to use only from suspended particles and oil products.

Known filter for wastewater treatment from heavy metal ions (patent RU! No. 26548, published December 10, 2002), adopted as a prototype consisting of a housing with an inlet and an outlet, in which a layer of ion-exchange material with cationic materials (ONa or SO _{4 is} installed ^2- ) and anionic (-NH ₂ , -NHR, -NR ₂ ) groups, characterized in that the ion-exchange material is polyacrylonitrile-based ion-exchange fiber with a ratio of cationic and anionic groups (1-4) :( 4-1) in the form of a comb with a density of 160-180 kg / m ³ and under which an additional layer of granular active is installed coal with a granule size of 1.0-3.5 mm and a bulk density of 420-470 kg / m, limited to two layers of filter material in the form of a comb of polyacrylonitrile fibers with a surface density of 180-200 g / m ² with the following ratio of layers: filter material : activated carbon: filter material: ion-exchange material - 1: (4-7): 1: (25-30).

The disadvantage of the filter is the use of expensive filtering and ion-exchange materials requiring additional production, high energy consumption of the catalyst, high air consumption and low efficiency of diluting molybdenum from diluted solutions.

The technical result is the creation of a filter for treating wastewater and diluted solutions of molybdenum ions with a combined filter load of quartz sand and chemisorbent, the possibility of repeated regeneration and cleaning of the filter, as well as low power consumption of the filter.

The technical result is achieved by the fact that the casing is made in the form of a cylindrical tank rigidly mounted on a support, technological holes are made in the lower part of the tank for installing a pipe made of chemically resistant polyethylene, at the end of which a universal adapter of chemically resistant low pressure polyethylene with rubber gaskets is fixed, as filter materials use pre-treated metal waste from unalloyed steel with a specific surface area of 20 to 50 cm ² / g and quartz sand with a particle diameter of 1 to 2 mm in a ratio of 1: 2.5 by weight, a stand is fixed on the lid of the tank to which a sandblasting pump is installed using a detachable fixed connection, connected to the sandblasting tank and an airlift installed inside the tank , in the lower part of which a funnel with a grate is installed, and pipes are welded to the sand washer on both sides.

The filter for wastewater treatment of molybdenum ions is illustrated by the following figure:

FIG. 1 - filter for wastewater treatment from molybdenum ions, where:

1 - cylindrical tank;

2 - conical bottom;

3 - stable support;

4 - removable cover;

5 - corrugated pipe;

6 - universal adapter for pipes of various diameters;

7 - the supply pipe of the solution to be cleaned

8 - radial distributor of water supply;

9 - pressure gauge;

10 - sand cushion;

11 - filter material;

12 - outlet pipe of the filtrate;

13 - sand washer;

14 - sandblasting pump;

15 - stand for the pump;

16 - airlift;

17 - airlift funnel

18 - grate for separating sand from the reagent;

19 - outlet window for regenerated sand;

20 - pipe for supplying washing water;

21 - drain wash water;

22 - outlet window with a lid, to remove the load from the filter.

The filter housing for treating wastewater from molybdenum ions is made of a cylindrical metal chemically resistant tank 1, which is connected to a conical bottom 2 made of the same material as the tank 1, using a welded joint and connected to a power source (in FIG. not shown). The device casing is fixed by a detachable fixed connection on a stable support 3 made of steel. At the top of the tank 1 is equipped with a removable cap 4, bolted through chemically-resistant gaskets and made of the same material as the tank 1. To supply the solution to be cleaned, a pipe 7 is welded to the hole in the tank 1, on which a pressure gauge 9 is screwed to control inlet pressure. Inside the tank 1, a radial distributor is connected to the pipe 7 by means of a welded joint

8. Outside the tank 1, a two-layer corrugated pipe made of chemically resistant polyethylene 5 is attached to the pipe 7 by a screw connection, equipped with a universal adapter for pipes of various diameters 6, made of chemically resistant low-pressure polyethylene with rubber gaskets to ensure the tightness of the connection. In the conical bottom of the device there is a sand cushion 10, represented by quartz sand with a particle diameter of 1 to 2 mm. The filter material 11, represented by a mixture of quartz sand and chemisorbent, represented by pre-treated metal waste from unalloyed steel, is placed in the tank. The filtrate is discharged from the tank through a welded pipe 12. To regenerate the load, a sand washer 13 is attached to the lid 4 using a detachable fixed connection, equipped with a pump 14 using a detachable fixed bolt connection through a stand 15. The sand washer 13 is connected to the airlift 16 for supplying quartz sand. Airlift 16 is equipped with a welded funnel 17 with a bolt 18 attached, for separating quartz sand from chemisorbent. An exhaust window 19 is welded to the sand washer 13 to return to the combined loading layer of purified quartz sand; a pipe 20 for supplying water and a drain pipe 21 for draining the wash water along with the separated pollutants. The loading of quartz sand and chemisorbent is carried out through the cover 4. The lower part of the filter is equipped with a bolt connection with an exhaust window 22 to remove spent quartz sand.

The filter for wastewater treatment from molybdenum ions is carried out as follows: the purified water is supplied to the tank 1 from the bottom up through a universal adapter for pipes of various diameters 6 through a two-layer corrugated pipe 5, which allows connecting the device to different outlets located at a short distance from each other; then, through the pipe 7 through the radial distributor 8, it passes through the combined load 11, which is a mixture of quartz sand and chemisorbent, and the purified filtrate is discharged through the pipe 12. The pipe 7 that is being cleaned is equipped with a pressure gauge 9, by which the input pressure is controlled. If the preset pressure value is exceeded, the process of loading regeneration begins without stopping the operation of the filter itself. Quartz sand containing trapped particles and chemisorption products is supplied from the sand cushion 10 by means of a pump 14 located on the support 15, airlift 16 to the sand washer 13 located at the top. To avoid getting chemisorbent into the sand washer, the airlift is equipped with a funnel 17 with a grid 18 for separating quartz sand from chemisorbent. The cleaning of quartz sand begins in the airlift itself, in which impurities are separated from the sand grains by vortex mixing. Contaminated quartz sand wakes up from the outlet of the pump into the labyrinth of the sand washer 13, where it is washed with a small countercurrent of clean water, which is used as a filtrate that flows through the nozzle 20. The separated solid particles and suspensions are discharged through the outlet nozzle 21 together with the washing water, and the purified quartz sand returns to the combined load 11 through the outlet window 19. As a result, the silica sand in the combined load 11 is in a slow, constant downward movement through the chemisorbent. Thus, both water purification and washing of quartz sand occur continuously, allowing the filter to work without shutting down. The change of loading is performed using the outlet window 22, through which it is removed from the filter, and a removable cover 4, through which filling of the new load takes place. The filter housing for treating wastewater from molybdenum ions is fixed by a detachable fixed connection on a stable support 3.

The chemisorbent is represented by pre-treated metal waste from unalloyed steel with a specific surface area of 20-50 cm ² / g, for example, oxidized shavings from unalloyed steel. Pretreatment consists in wetting metal waste with deionized water and keeping it in the open air for three days to intensify the formation of iron oxides on their surface.

The proposed filter for wastewater treatment from molybdenum ions relates to continuous installations with an upward flow of the liquid being cleaned and countercurrent regeneration and can be effectively used for treating industrial wastewater from molybdenum ions.

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Claims (1)

A filter for treating wastewater from molybdenum ions, consisting of a casing with an inlet and an outlet, limited by a mixture of filter materials, characterized in that the casing is made in the form of a cylindrical tank, rigidly fixed to a support, technological holes for installing the pipe from chemically made in the lower part of the tank resistant polyethylene, at the end of which is attached a universal adapter of chemically resistant low-pressure polyethylene with rubber gaskets, pre-filter materials are used variably processed metal waste from unalloyed steel with a specific surface area of 20 to 50 cm ² / g and quartz sand with a particle diameter of 1 to 2 mm in a ratio of 1: 2.5 by weight, a stand is fixed on the tank lid, which is mounted on using a detachable fixed connection, a sandblasting pump connected to a sandblasting tank and an airlift installed inside the tank, in the lower part of which a funnel with a grill is installed, and pipes are welded to the sandblasting on both sides.

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