RU70510U1 - PLANT FOR FLOTATION-FILTRATION WATER TREATMENT - Google Patents

Abstract

The utility model relates to techniques for treating wastewater from petroleum products, surfactants, organic compounds, etc. and can be used in workshops of repair enterprises of mobile units.

Installation for flotation and filtration water purification contains a flotator, sump, a container for collecting foam product, a container of a chemical reagent for a flotator, a tank for the accumulation of purified water, filters. Two pumps, nine electrically operated valves, a flow meter, a pH meter, a chemical reagent tank for purified water, an electric mixer, a program control unit and two filters of the same design, which are connected in parallel and connected to the flotator, are installed on their connections, the first and the second is electrically operated valves, and each filter is made of upper, middle and lower parts, and the upper part of the filters is made with a cover, with an air valve and is rigidly connected to the middle part and the bottom the upper part of the filters is made at an angle of at least 30 degrees and is connected through the third and fourth electrically operated valves and the first pump with a flotator, the middle and lower parts of the filters are detachable, and the middle part of the filters is made with upper and lower metal grids, one of which is installed in a detachable part between the metal grids in the middle part of the filters there is an adsorbent, the lower part of the filters is made by a cone in which an elongated perforated spiral coil is placed, which connects en with compressor, the bottom of the filters is also connected through

the fifth and sixth electrically operated valves and a flow meter with a tank for collecting purified water, and the tops of the lower conical parts of the filters are connected through a second pump, the seventh and eighth electrically operated valves with a tank for collecting purified, in which a pH meter and an electric mixer are installed, and connected through the ninth electrically controlled a valve with a chemical reagent tank for purified water, and all electrically operated valves, a pH meter and a flow meter are connected to the program control unit.

The middle part of both filters is filled with a two-layer adsorbent, the first layer of expanded clay of two fractions with a grain size of not more than 10 mm with the direction of grain reduction from top to bottom, and the second layer of diatomite, modified.

Diatomite fraction 1-2 mm, modified with 0.3-0.5 percent solution of aluminum sulfate in the ratio T: W = 1: 10, precipitated with ammonia until pH = 7, followed by heat treatment at a temperature of 200 ° C for 2 hours.

The proposed utility model allows to increase the quality of water treatment up to 99%, due to the use of an adsorbent of modified diatomite for oil-containing wastewater, to improve the technological process of treatment, due to the automation of the installation, and to reduce operating costs by 30%.

Description

The utility model relates to techniques for treating wastewater from petroleum products, surfactants, organic compounds, etc. and can be used in workshops of repair enterprises of mobile units.

A known installation of water purification by filtration, containing a group of pressure filters with granular loading and piping with pipelines for supplying water for purification, removal of purified water, supply of washing water with shut-off valves with a drive, removal of washing water and the first filtrate, collectors for supplying raw water for cleaning, removal of purified water, supply and removal of washing water and removal of the first filtrate and an automatic control system. (RF patent No. 2264248 "Installation of water purification by filtration", IPC С02F 1/24, author Gladky A.I., published on November 20, 2005, BI No. 32).

The disadvantage of the installation is that the treatment of oily wastewater is not sufficiently carried out, since there is no flotation treatment.

A known installation for flotation-filtration water purification, containing in the upper part a technological unit including a flotation chamber and a filter placed in a single unit casing, in the lower part there is a container for the accumulation of purified water and a separately installed pump unit, an ejector with a pipe for supplying atmospheric air, the saturator and the piping system, flotation and filtration chamber of the technological unit are located in a horizontal plane, they are separate containers, the design clearly formed by

sequential placement along the axis of symmetry of a single body in the direction from the wall of the latter to the center of several structural elements, a dividing wall, made in the form of a ring with an element cut out along the entire height of the ring, providing the formation of a zone structure of the flotation chamber, a restrictive cylinder, forming together with the sectional walls installed between the outer surface of the latter and the surface of the body, the cavity of the flotation zones and the cavity for collecting the foam product made with the ability to ensure the flow of flotated water from the second zone of the flotation chamber into the transitional technological zone, due to the presence of holes in the lower part of the restriction cylinder, a separation and overflow partition separating the flotation chamber from the filtration chamber and made in the form of a cylindrical pipe with half-openings at the upper end, and having a vertically mounted plate inside, the height of which is less than the height of the cylindrical pipe, dividing the pipe cavity into small and large zones, a capacity for Accumulation of purified water is placed in a single unit casing and is connected to the process unit via an inlet pipe. (RF patent No. 2254297 "Installation for flotation-filtration water purification", IPC С02F 1/24, authors A. Lugovkin et al., Published on June 20, 2005 BI No. 17).

The disadvantage of this installation is the lack of an adsorbent regeneration system, which significantly increases operating costs.

The technical result is to increase the degree of wastewater treatment, due to the two-layer loading of the adsorbent, reducing operating costs, due to the regeneration of the adsorbent.

The technical result is achieved by the fact that two pumps, nine electrically operated valves, a flow meter, a pH meter, a chemical reagent tank for purified water, an electric mixer, a program control unit and two filters of the same design, which are connected in parallel and connected to the flotator, are added to them the connections are installed the first and second electrically operated valves, and each filter is made of upper, middle and lower parts, and the upper part of the filters is made with a cover, with an air valve and a gesture o connected to the middle part, and the bottom of the upper part of the filters is made at an angle of at least 30 degrees and connected through the third and fourth electrically operated valves and the first pump with a flotator, the middle and lower parts of the filters are detachable, and the middle part of the filters is made with upper and lower metal nets, one of which is installed in the detachable part between the metal nets in the middle part of the filters is an adsorbent, the lower part of the filters is made by a cone in which an elongated perforated with an ralike coil that is connected to the compressor, the lower part of the filters is also connected through the fifth and sixth electrically operated valves and a flow meter to the tank for collecting purified water, and the tops of the lower conical parts of the filters are connected through a second pump, the seventh and eighth electrically operated valves to the tank for collecting purified in which a pH meter and an electric mixer are installed, and connected through a ninth electrically controlled valve to a chemical reagent tank for purified water, all electrically controlled valves, pH-met and a flow meter connected to the program control unit.

The introduction to the installation of flotation-filtration water purification of two parallel-connected filters ensures continuity

the technological process of water treatment, which consists of water purification and adsorbent regeneration, and as a result, halving the purification time, and the presence of control over the water purification process in terms of volume and pH level will improve the quality of purification and reduce operating costs by 30%.

Development of the design of the filter with the upper part provides: sedimentation of coarse impurities, preventing contamination of the surface and pores of the adsorbent, thereby increasing the life of the filter and improving the quality of cleaning; creating a reduced pressure of the incoming water stream, as a result of which the contact time of the impurity with the surface of the adsorbent is significantly increased, which increases the efficiency of water purification; the inclined bottom at an angle of at least 30 degrees and the rounded corners of the upper part of the filter localize the precipitated coarse impurity near the outlet of regeneration water, which also positively affects the quality of water treatment. The implementation of the middle and lower parts of the filter detachable provides convenience when replacing the adsorbent. Favorable conditions for filtration are created due to the bubbling of the adsorbent, which is structurally provided by the presence of an air supply pipe made in the form of an elongated, perforated, spiral-shaped coil providing uniform distribution of air over the entire cross section of the filter, thereby increasing the efficiency of water purification by increasing the contact area of the adsorbent with water . The implementation of the middle part with metal grids, allows you to partially break the foamy emulsion of water, prevents the release of adsorbent in the upper part during regeneration and keeps the adsorbent from being ejected by streams of water into the cone during filtration, which improves the quality of water treatment.

The implementation of the tank for collecting purified water with a pH meter, an electric mixer connected to a supply tank of a chemical reagent,

on the connection of which an electrically controlled valve is installed, and the electrically controlled valve, a pH meter and an electric mixer are connected to a program control unit, which allows automating the process of neutralizing purified water and reducing labor costs.

Introduction to the installation of a program control unit, which is connected to nine electrically controlled valves, allows you to automate the control of the water treatment process and reduce labor costs.

The use of expanded clay of various fractions with a grain size of not more than 10 mm with the direction of grain reduction from top to bottom and diatomite, 1-2 mm fractions, modified with 0.3-0.5 percent solution of aluminum sulfate in the ratio T: W = 1: 10, precipitated with ammonia until pH = 7, followed by heat treatment at a temperature of 200 ° C for 2 hours, allows to achieve a degree of purification of effluents containing petroleum products, up to 99%.

Figure 1 presents the installation for flotation-filtration water treatment.

The installation consists of a flotator 1, two filters 2, 3, a container for collecting purified water 4, a program control unit 5. Each filter is made of three parts: the upper 6, 7, rigidly fastened to the middle part 8, 9, the lower part, presented in in the form of a cone 10, 11, metal mesh 12, 13, 14, 15, the filter cover 16, 17, the air valve of the filter 18, 19, an elongated, perforated, spiral coil of the conical part of the filter 20, 21, the compressor 22, 23, the capacity of the chemical reagent for flotator 24, pH meter 25, sump 26, chemical reagent tank for purified water 27, an electric mixer 28, a container for collecting foam product 29, the first and second pumps, respectively 30, 31, a flow meter 32, solenoid valves 33, 34, 35, 36, 37, 38, 39, 40, 41.

Installation works as follows:

Purified water contaminated with oil products from the sump 26 is fed into the flotator 1. Then the contaminated drain is mixed with a chemical reagent from the tank 24, fine air bubbles are formed that trap particles of contaminants and carry them to the surface of the water to be purified, where a foam product layer is formed. The foam product formed on the surface of the water to be cleaned is removed to a container for collecting the foam product 29. Further, the water to be purified, which has undergone effective flotation treatment, flows into the upper part of the filter 6, which has a cover 16 with an air exhaust valve 18, and flows down the inclined bottom to the end from the side surface, fills the upper part of the filter 6 until the water level reaches the upper retaining mesh 12 located at the top of the middle part of the filter 8, which partially breaks the foam emulsion, and flowing it penetrates into the middle a second part of the filter 8, the completed two-layer adsorbent (expanded clay, diatomite modified).

Expanded clay material of two fractions of 6-10 mm and 3-5 mm was used as the filtering material of the upper layer, with a direction of decreasing grain sizes from top to bottom, the bottom layer was diatomite, diatomite fraction 1-2 mm, modified with 0.3-0.5 percent solution of aluminum sulfate in the ratio of T: W = 1: 10, precipitated with ammonia to establish pH = 7, followed by heat treatment at a temperature of 200 ° C for 2 hours. Passing through the adsorbent layers in a downward flow, the purified water meets a countercurrent of fine air bubbles, which is supplied by the compressor 22 to the lower conical part of the filter 10, through an elongated, perforated, spiral-shaped coil of the conical part of the filter 20. The filtered water passing through the support grid 14 holding

the adsorbent from the ejection by streams of water into the cone 10 flows into the conical part of the filter 10, at the top of which the fine sorption charge is precipitated, washed by the streams of water during the filtration process, then the water passing through the flow meter 32, which measures the volume of purified water and transfers information to the block program control 5, which regulates the beginning of adsorbent regeneration, then gravity water enters the tank for collecting purified water 4, in which the pH level is controlled, through the control unit 5, which controls the flow of chemical reagent from the tank 27, through the electrically controlled valve 41 and the moment of switching on the mixer 28.

During the regeneration period, water from the container for collecting purified water 4 is supplied by the second pump 31 to the conical part of the first filter 10, passing through the layers of the sorption charge, the washing water flows into the upper part of the filter 6, washing away the coarse impurity deposited during the filtering process, and the metal mesh 12 prevents the release of porous adsorbent, water is removed through the outlet of regeneration water 35 by the first pump 30 to the flotator 1.

The program control unit 5 controls the processes of water purification and filter regeneration, based on measurements of the volume of purified water passing through the first or second filter, both processes are continuous, since two identical filters are installed in parallel in the installation.

When supplying water for cleaning to the first filter 2, and at the same time regenerating the second filter 3, the program control unit 5 opens the electrically operated valves 33, 36, 37, 40, and the electrically controlled valves 34, 35, 38, 39 closes; when water is supplied for cleaning to the second filter 3 and at the same time regeneration of the first filter 2, the control of 33, 34, 35, 36, 37, 38, 39, 40 by electrically controlled valves occurs in the reverse order.

The proposed utility model allows to increase the quality of water treatment up to 99%, due to the use of an adsorbent of modified diatomite for oil-containing wastewater, to improve the technological process of treatment, due to the automation of the installation, and to reduce operating costs by 30%.

Claims (3)

1. Installation for flotation-filtration water treatment, containing a flotator, sump, a container for collecting foam product, a container of a chemical reagent for a flotator, a tank for accumulating purified water, filters, characterized in that it is additionally introduced two pumps, nine electrically controlled valves, a flow meter, a pH meter, a chemical reagent tank for purified water, an electric mixer, a program control unit and two filters of the same design, which are connected in parallel and connected to the flotator, at their connection the first and second electrically operated valves are installed, and each filter is made of upper, middle and lower parts, the upper part of the filters made with a cover, with an air valve and rigidly connected to the middle part, and the bottom of the upper part of the filters is made at an angle of at least 30 degrees and connected through the third and fourth electrically operated valves and the first pump with a flotator, the middle and lower parts of the filters are detachable, and the middle part of the filters is made with upper and lower metal grids, one of which It is installed in a detachable part between metal grids, an adsorbent is located in the middle part of the filters, the lower part of the filters is made by a cone, in which an elongated perforated spiral coil is connected, which is connected to the compressor, the lower part of the filters is also connected through the fifth and sixth electrically operated valves and the flow meter to the tank for collecting purified water, and the tops of the lower conical parts of the filters are connected through a second pump, the seventh and eighth electrically operated valves with a container for collecting purified minutes, wherein the set pH-meter and mixer, and is connected via a ninth electrically controllable valve with a chemical reagent container for purified water, all electrically-controlled valves, a pH meter and a flow meter connected to a program control unit. 2. Installation for flotation-filtration water purification according to claim 1, characterized in that the middle part of both filters is filled with adsorbent bilayer, the first layer of expanded clay of two fractions with grain sizes of not more than 10 mm with the direction of grain reduction from top to bottom, and the second layer of diatomite modified. 3. Installation for flotation-filtration water purification according to claim 2, characterized in that the diatomite fraction 1-2 mm, modified with 0.3-0.5% solution of aluminum sulfate in a ratio of T: W = 1: 10, precipitated ammonia to establish a pH of 7, followed by heat treatment at a temperature of 200 ° C for 2 hours