RU2799647C1 - Groundwater aerator with submersible pump - Google Patents

Abstract

FIELD: autonomous water supply.

SUBSTANCE: autonomous water supply of objects with low water consumption. Invention is intended for use in technological schemes for the purification of groundwater from dissolved gases (radon, carbon dioxide, hydrogen sulphide) and dissolved forms of iron and manganese. The aerator contains a column with a conical bottom with a capacity of 300-400 l, a diameter of 500-600 mm and a tight-fitting lid. In the upper part of the cover along the central axis, an air and gas outlet pipeline is connected. Under the cover on the source water inlet pipeline to the column, equipped with a control valve, a flow divider is installed along the column axis, containing an inverted parabolic bowl and a sleeve with a calibrated hole. An overflow device is installed under the cover on the pipeline for discharging water into the sewer, including a funnel and a water seal. In the lower part of the column on the air supply pipeline, a device for bubbling water in the form of a disk aerator is installed. The pipeline for draining water with sediment, equipped with a shut-off valve, is connected along the longitudinal axis to the bottom of the column. Inside the column, a plastic pipe with a diameter of 110 mm is fixed and fixed vertically along the column wall. The upper opening of the pipe is closed with a plastic cover, and the lower opening of the pipe is open and located under the device for bubbling water. A submersible borehole centrifugal pump with a lower water intake is installed inside the plastic pipe. A hole with a diameter of 32 mm is made in the pipe cover, equal to the diameter of the outlet pipe of the centrifugal submersible pump. The outlet pipe of the pump is rigidly fixed in the cover. The outlet of the pump is connected to the aerated water outlet pipeline with a check valve, and the pump suction is located at the level of the lower open hole of the plastic pipe.

EFFECT: reduced noise level from the second lift pump during water intake.

1 cl, 1 ex, 1 dwg

Description

The invention relates to the field of autonomous water supply for objects with low water consumption (for example, a cottage, a farm, a construction camp, a medical assistant's station, a roadside cafe, a hotel or a gas station). The groundwater aerator with a submersible pump, which has the function of supplying water to consumers, is intended for use in technological schemes for treating groundwater from the dissolved gases contained in them (radon, carbon dioxide, hydrogen sulfide) and dissolved forms of iron and manganese. In addition, the device has a water capacity of 300-400 liters and can serve as a water storage tank and ensure uniform water supply for further treatment or to the consumer. The plant is designed to work in technological schemes of water treatment with a flow rate of up to 2.5 m ³ /hour. Such consumption on average does not exceed that required for autonomous water supply of the cottage.

Known utility model RU 204563U1, "Groundwater aerator", IPC C02F 1/20 (2006.01), C02F 103/06 (2006.01), B01D 19/00 (2006.01), 31.05.2021 (prototype). The groundwater aerator is used in technological schemes of groundwater treatment of individual housing construction projects. At the same time, aerated water is taken from the aerator for supply to consumers by a second lift pump, which is a surface pump and is mounted next to the aerator. The noise level from a working surface pump can be 55-90 dB, depending on the brand. The maximum permissible noise level in a residential area is 55 dB during the daytime, and 45 dB at night (SanPiN 1.2.3685-21, approved by the Decree of the Chief State Sanitary Doctor of the Russian Federation of 01/28/2021 N 2). disadvantage Such a water intake system, consisting of a well-known aerator and a surface pump, is the increased noise level created by the pump of the second rise of water from the aerator, when installing a technological scheme for water purification in residential premises or adjacent to residential premises.

The technical objective of the invention is to reduce the noise level from the pump of the second rise when water is taken from the groundwater aerator.

The technical result is achieved due to the fact that a submersible borehole centrifugal pump is installed inside the well-known groundwater aerator, which has a low noise level compared to surface pumps. To do this, a plastic pipe with a diameter of 110 mm is installed vertically along the column wall in the aerator column, which imitates the well casing. A cover is installed on the pipe from above, through which the pipe from the pump with a diameter of 32 mm passes. In this case, the pipe from the pump and the cover are welded and the pump is fixed in the pipe. The submersible borehole centrifugal pump is used with a bottom water intake so that the suction of water is carried out at the bottom of the column under the water bubbling device. Thus, the noise level is reduced when water is taken from the groundwater aerator.

The technical problem is achieved due to the fact that the groundwater aerator with a submersible pump contains a column made of plastic, with a conical bottom with a capacity of 300-400 l, a diameter of 500-600 mm and a tight-fitting lid, in the upper part of which an outlet pipeline is connected along the central axis air and gases, under the cover on the source water inlet pipeline to the column, equipped with a control valve, a flow divider is installed along the axis of the column, containing an inverted bowl of a parabolic profile and a sleeve with a calibrated hole; under the cover on the water outlet pipeline into the sewer, located at the upper permissible water level, an overflow device is installed, including a funnel and a water seal; in the lower part of the column on the air supply pipeline, a device for bubbling water in the form of a disk aerator is installed using a threaded connection; the pipeline for draining water with sediment, equipped with a stopcock, is connected along the longitudinal axis to the bottom of the column, according to the invention, inside the column, a plastic pipe with a diameter of 110 mm is installed and fixed vertically along the wall of the column, the upper opening of the pipe is closed with a plastic cap, and the lower opening of the pipe is open and located under the device for bubbling water, a submersible borehole centrifugal pump with a lower water intake is installed inside the plastic pipe; a hole with a diameter of 32 mm is made in the pipe cover, equal to the diameter of the outlet pipe of the centrifugal submersible pump, and the pump outlet pipe is rigidly fixed in the cover, the pump outlet is connected to the aerated water supply pipeline with a check valve, and the suction hole of the pump is located at the level of the lower open hole of the plastic pipes.

The essence of the invention is illustrated by the diagram in the drawing, which shows a General view of the device.

The groundwater aerator, like the prototype, consists of: a column 2 with a diameter of 500-600 mm, having a conical bottom and a removable, tightly fitting top cover in the form of a truncated cone 1; flow divider 3 installed on the source water inlet pipeline under cover 1 along the axis of column 2; device for bubbling water 4, installed in the lower part of the column 2 on the air inlet pipeline; control valve 5 installed on the source water inlet pipeline; a check valve 6 installed on the aerated water outlet pipeline, a shut-off valve 7 installed on the pipeline for draining water with sediment into the sewer; overflow device 8 connected to the pipeline draining the sediment into the sewer. Unlike the prototype, inside the column 2, vertically along the wall of the column, a plastic pipe 9 with a diameter of 110 mm is installed and fixed, imitating a well with a diameter of 110 mm; the upper opening of the pipe 9 is closed with a plastic cover, and the lower opening of the pipe 9 is open and located under the device for bubbling water 4; a submersible borehole centrifugal pump 10 with a lower water intake is installed inside the plastic pipe 9; in the cover of the pipe 9 there is a hole with a diameter of 32 mm, equal to the diameter of the outlet pipe of the centrifugal submersible pump 10, and the outlet pipe of the pump is rigidly fixed in the cover, and the suction hole of the pump 10 is located at the level of the lower open hole of the plastic pipe 9. The outlet of the pump 10 is connected to the pipeline outlet of aerated water. The aerator also contains an air and gas outlet pipeline installed in the upper part of the removable cover 1. The divider 3 is an inverted parabolic bowl and a sleeve under the bowl with a calibrated hole, located in the upper part of the aerator under the cover and is never flooded with water. Water bubbling device 4 is a membrane disc aerator connected to the air supply pipeline through a ¾ inch thread and can be removed for repair or replacement. The overflow device 8 contains a funnel and a water seal installed inside the column 2 at the upper allowable water level. The construction material of the groundwater aerator is plastic.

The column diameter is chosen within 500-600 mm, which ensures efficient bubbling of the water volume and optimal opening of the dome. The column capacity of 300-400 l provides the minimum required supply of water for the own needs of the water treatment system (the minimum volume of water, the absence of stagnant zones, intensive water circulation in the column reduces the likelihood of bacterial contamination).

The device works as follows.

A jet of water is supplied under the divider 3. Water is sprayed in the form of a cone and flows down the walls of the column 2. The flow rate of the source water to the divider 3 is controlled by the valve 5. The water level in the device during drawdown can be any within the lower and upper levels and depends on the flow rate of the source water and the flow rate of aerated water. The upper and lower levels of water in column 2 are controlled by level sensors that are installed in the body of column 2. Water, having passed the aeration zone from the divider 3 to the bubbling device 4, enters the zone of precipitation of insoluble substances. Sediment descends into the sewer by opening tap 7. The volume of sediment depends on the quality of the source water, so the frequency of its descent is determined by calculation and refined by operating experience. The intake of aerated water is carried out during water intake by a submersible centrifugal pump 10 installed in the pipe 9, above the sediment accumulation zone, under the water bubbling device 4, through the aerated water outlet pipeline through the check valve 6. In case of column 2 overflow, excess water enters the funnel of the overflow device 8 and through a water trap merges into the sewer. The air supply to the bubbling device 4 is carried out continuously during drawdown.

The estimated flow rate of the source water is 0.5-1.5 m ³ / hour, the estimated flow rate of aerated water is 0.5-2.5 m ³ / hour, the estimated air flow rate is 20-160 l / min, with these parameters, water is purified from radon , hydrogen sulfide, carbon dioxide, dissolved forms of iron, manganese. Air is supplied by the compressor through the air inlet pipeline. The exact air flow rate is determined by calculation and depends on the concentration of pollutants in the source water. The compressor head required to overcome the air pressure loss during bubbling and air outlet outside the unit through the air and gas outlet pipeline in the lid is determined by calculation. Based on the obtained air flow and pressure, a compressor is selected. The pump and pipelines are selected according to the maximum consumption of aerated water 2.5 m ³ /hour. The maximum pressure developed by the pump should not exceed 60 m. The aerator device guarantees the removal of radon from the source water with a concentration of up to 400 Bq / kg.

Example. The proposed design of the device for aerating groundwater is used as a prototype in water treatment plants in cottages in the settlements of the Chelyabinsk region. The village of Babushkina, Chelyabinsk. The maximum water consumption of purified water is 1.8 m ³ /hour. The APV groundwater aerator receives softened iron-free water with a flow rate of 0.78 m ³ /hour, degassed water is supplied by a second lift pump with a flow rate of 1.8 m ³ /hour. Air consumption for aeration adopted 80 l/min or 4.8 m ³ /hour. The plant uses a submersible centrifugal pump with a maximum head of 50 m and a maximum flow rate of 3.3 m ³ /hour. The noise level in different operating modes of the installation does not exceed 20 dB. A decrease in the concentration of radon-222 was recorded, during aeration it decreases from 94±15 Bq/kg to a concentration of less than 8 Bq/kg by 91.5%, a decrease in free carbon dioxide during aeration from 22 mg/l to 2.3 mg/l by 89, 5% with aeration time of 30 min.

Claims (1)

Groundwater aerator with a submersible pump, containing a column made of plastic, with a conical bottom with a capacity of 300-400 l, a diameter of 500-600 mm and a tight-fitting lid, in the upper part of which, along the central axis, an air and gas outlet pipeline is connected, under the lid on the pipeline inlet of the source water into the column, equipped with a control valve, along the axis of the column there is a flow divider containing an inverted bowl of a parabolic profile and a sleeve with a calibrated hole; under the cover on the water outlet pipeline into the sewer, located at the upper permissible water level, an overflow device is installed, including a funnel and a water seal; in the lower part of the column on the air supply pipeline, a device for bubbling water in the form of a disk aerator is installed using a threaded connection; the pipeline for draining water with sediment, equipped with a stopcock, is connected along the longitudinal axis to the bottom of the column, characterized in that inside the column, vertically along the wall of the column, a plastic pipe with a diameter of 110 mm is installed and fixed, the upper opening of the pipe is closed with a plastic cover, and the lower opening of the pipe open and located under the device for sparging water; a submersible borehole centrifugal pump with a lower water intake is installed inside the plastic pipe; a hole with a diameter of 32 mm is made in the pipe cover, equal to the diameter of the outlet pipe of the centrifugal submersible pump, and the pump outlet pipe is rigidly fixed in the cover, the pump outlet is connected to the aerated water outlet pipeline, and the suction hole of the pump is located at the level of the lower open hole of the plastic pipe.

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