RU2778527C1 - Water aeration device in membrane tank - Google Patents

Abstract

FIELD: water saturarion.

SUBSTANCE: invention is intended to saturate water with atmospheric oxygen in iron removal and water treatment systems. The device contains a distribution head 4, which includes an interconnected mounting pipe 5, a safety group pipe 9, an air removal pipe 7 connected to an air separation valve 8, and a separate air pipe 13 with an air duct connected to it for supplying air from the compressor. The air duct is made in the form of a tube 10 with an atomizer 14 at the end. The tube 10 is placed coaxially with the mounting pipe 5 and passes through it and the upper pipe 6 of the membrane tank 1 with a gap 12, which ensures free passage of air between the walls of the tube 10 and the pipe 6. The atomizer 14 has a shape with smoothed corners, which excludes damage to the membrane 15 in the tank. The atomizer 14 is located in the lower quarter of the internal cavity of the membrane tank 1. The distribution head 4 is installed on the upper branch pipe 6 of the membrane tank 1. The compressor is electrically connected in parallel with the water pump. Saturation of water with air oxygen is carried out in a membrane tank and the use of a separate aeration column and a water flow switch is not required in the water iron removal system.

EFFECT: improving the efficiency of the device.

1 cl, 1 dwg

Description

Technical field

The device is designed to saturate water with air oxygen in iron removal and water treatment systems.

State of the art

Known pressure systems for iron removal and water treatment designed to purify water with a high content of dissolved ferrous iron (Zolotova E.F., Les G.Yu. Purification of water from iron, manganese, fluorine and hydrogen sulfide. M., Stroypedat, 1975, 176 s, chapter 3 "Aeration methods of water iron removal", p. 13). Such systems, in particular, are used to supply water to individual households that are not connected to the central water supply. A typical system includes a water pump, an aeration column (aeration unit), a filter and a membrane tank connected in series (according to the water flow), while air is pumped into the aeration column by a compressor. The compressor is turned on at the command of the flow sensor (water flow switch), which is installed in the water supply pipeline to the consumer. The compressor works when there is a flow of water in the pipeline. The water pump is switched on by the command of the pressure switch when the water pressure in the pipeline drops below the set minimum value and turns off when the set maximum pressure in the water supply system is reached.

In the aeration column, water is saturated with atmospheric oxygen to increase the efficiency of the filter; in the filter, ferrous iron dissolved in water is oxidized, it passes into a suspended state and mechanical purification (filtration) of water from suspended particles.

The membrane tank is used to accumulate water and maintain pressure in the autonomous water supply system (Orekhov A.N. Application of membrane tanks in engineering systems. Sanitary engineering, No. 2, 2016, pp. 46-49). A membrane tank is a hermetic spherical or cylindrical metal case, inside of which there is an elastic membrane in the form of a sleeve attached from above and below with the help of flanges to the body. A working pipe for supplying and discharging water is fixed on the lower flange. The upper branch pipe serves to connect to it a safety group consisting of a pressure gauge, an air vent and a safety valve. The membrane forms an internal cavity filled with water. An inert gas or air is pumped into the space between the housing and the membrane to pressurize the housing. Thus, when the water pump is operating, water is injected into the internal cavity of the membrane, after the water pump stops working, the water pressure in the water supply system is maintained by the gas pressure in the tank body on the water inside the membrane, and the water supply is carried out due to the flow of water accumulated in the membrane tank. If air enters the internal cavity of the membrane from the pipeline, it is removed through the air vent.

The need to use three independent devices: an aeration column, a filter and a membrane tank requires additional space for their placement and increases the cost of the system as a whole, which limits its use, in addition, the use of two relays to control the compressor and water pump complicates the system.

Known water treatment systems that use water-air ejectors to saturate the water with oxygen from the air. Such devices are installed at the inlet of the filter and have small dimensions, however, they introduce a large pressure drop into the water supply system (Zolotova E.F., Les G.Yu. Purification of water from iron, manganese, fluorine and hydrogen sulfide. M., Stroypedat, 1975, 176 p., p. 21).

The prototype of the proposed device is the UniFLOW ХХХХ-АР2 aeration unit (UniVOD LLC, [found on 2022-02-20]. Found in <https://univod.ru/wp-content/uploads/2017/01/Air_Block_UniFLOW_АР2_RX.pdf> ).

The device contains a compressor with a check valve, a body of the contact chamber, a distribution head mounted on the upper part of the body of the contact chamber, a flow sensor installed on the outlet pipeline, a divider that mixes water and air, an air separation valve for separating and venting air from the water, and a distribution system designed to lead oxygenated water from the contact chamber to the filter. The check valve in the compressor is designed to protect the compressor from water ingress from the pipeline.

The distribution head contains a mounting pipe for connecting it to a membrane tank, an inlet pipe for connecting an inlet water pipeline and supplying it through a splitter to the body of the contact chamber, an outlet pipe for connecting an outlet water pipeline, an air pipe for supplying air from the compressor and a pipe for removing air from the body contact chamber. Inside the head, the air pipe is connected to the inlet pipe, the outlet pipe is connected to the distribution system, and the air removal pipe is connected by a tube to the air-separating valve, which is structurally located inside the body of the contact chamber.

The device works as follows. When water passes through the pipeline, the water flow sensor turns on the compressor, which pumps air into the water at the inlet of the distribution head. This water-air mixture, under the influence of the movement of water in the water supply, enters the divider, in which the water is intensively mixed with air and saturated with oxygen. Oxygenated water accumulates in the lower part of the body of the contact chamber, from where, through the distribution system and the outlet pipe, it enters the external filter. Air and other volatile impurities released from the water during aeration are removed from the body of the contact chamber through the air-separating valve and the air removal pipe. When the flow of water through the pipeline stops, the water flow sensor turns off the compressor and no air is blown.

In this device, saturation of water with oxygen is possible only during periods of water movement in the water supply system, because. in the absence of water movement, even when the compressor is running, the water-air mixture from the inlet pipe will not enter the divider. This limits the oxygen saturation time and reduces the efficiency of the device.

The technical result of the proposed device for aerating water in a membrane tank is to reduce the amount of installed equipment by excluding a separate contact chamber (aeration column) and a flow sensor (water flow switch) from its composition, reducing the cost of the system as a whole and increasing the efficiency of the aeration device when water is saturated with oxygen .

Disclosure of the essence of the invention

The membrane tank is standardly installed in front of the filter in the direction of water movement in the pipeline. The water aeration device in the membrane tank contains a compressor with a check valve, a distribution head mounted on the upper branch pipe of the membrane tank, and an air-separating valve. Distribution head contains interconnected mounting pipe, safety group pipe, air removal pipe, which is connected to the air separation valve. Also, the distribution head has an air pipe for air supply from the compressor. The device is distinguished by the fact that an air duct is introduced into it, which is placed in the lower quarter in the internal cavity of the membrane tank. The air duct is made in the form of a tube with a sprayer at the end, the other end of the tube is connected inside the distribution head to the air supply pipe, while the air duct tube is placed coaxially with the mounting pipe and passes through it with a gap for free passage of air between the walls of the tube and the pipe. The atomizer has a shape with smoothed corners, which excludes damage to the membrane in the tank. The compressor is electrically connected to a pressure switch in parallel with the water pump.

Thus, the saturation of water with air oxygen is carried out in a membrane tank, and a flow sensor is not required to control the operation of the compressor.

Brief description of the drawings

The figure shows a general view of the device in a section along the vertical plane of symmetry.

Implementation of the invention

The basis of the device is a typical membrane tank 1 (see, for example, UNIGIBI LLC, [retrieved 2022-02-20]. Found in <https://unigb.ru/dokumientatsiia>), which is normally a working branch pipe 2 through a fitting tee 3 is connected to the water supply system in front of the water purification filter (not shown in the figure). The distribution head 4 is installed with a mounting pipe 5 on the upper pipe 6 of the membrane tank 1. It is connected to the distribution head 4 through the air removal pipe 7 - air separation valve 8, and through the pipe of the safety group 9 - the safety group (not shown in the figure). The air duct tube 10 passes into the internal cavity 11 of the membrane tank 1 coaxially through the upper branch pipe 6 of the membrane tank 1 forming an annular gap 12 with it and through the distribution cap 4 is connected to the air pipe 13, to which the compressor is connected (not shown in the figure). At the second end of the tube there is an atomizer 14, which has a shape with smoothed corners, which excludes damage to the membrane 15, and can be made, for example, from a fine mesh or in the form of a perforation at the end of the air duct tube 10. The transverse dimension of the atomizer 14 does not exceed the inner diameter of the upper nozzle 6, which allows you to enter it inside the membrane 15 through this nozzle. The length of the air duct tube 10 should allow placement of the atomizer 14 in the lower quarter of the membrane tank 1. The compressor is electrically connected in parallel to the water pump (not shown in the figure).

The device works as follows. When the water pressure in the water supply system drops below the set value, the pressure switch (not shown in the diagram) turns on the water pump and compressor. Water is pumped through the working pipe 2 into the internal cavity 11 of the membrane tank 1, at the same time air is injected into it from the compressor through the air duct 10. Atomizer 14 improves the saturation of water with air oxygen. The air entering the internal cavity 11 rises and is removed through the air separation valve 8, passing to it through the gap 12 between the air duct tube 10 and the upper pipe 6, and the air removal pipe 7. Thus, the injected air does not create additional pressure and does not occupy a volume in membrane tank 1. I.e. membrane tank 1 fully fulfills its original purpose and additionally performs the functions of an aeration column. When the set pressure in the water supply system is reached, the water pump is switched off by the command of the pressure switch. The compressor can be turned off at the same time as the water pump is turned off or with a timer delay, which will provide additional oxygenation of the water and increase the efficiency of the device. The selection of water in the water supply system comes from the membrane tank 1, thus oxygenated water through the working pipe 2 enters the filter, and after it the purified water is supplied to the consumer.

The figure shows a distribution head 4 made of metal, but it can also be made of plastic, or assembled from separate elements, for example, tee fittings or otherwise. The distribution head 4 may have a shape different from that shown in the figure. All nozzles shown in the figure are made, as an example, on the basis of threaded connections, however, they can have a different design, for example, flanged, collet, etc.

Claims (1)

A water aeration device in a membrane tank, containing an air-separating valve and a distribution head, including an interconnected mounting pipe, a safety group pipe, an air removal pipe connected to an air-separating valve, as well as a separate air pipe for air supply from the compressor, characterized in that the distribution the head is attached with a mounting pipe to the upper pipe of the membrane tank, and the compressor is electrically connected in parallel with the water pump, an air duct is inserted into the device, located in the lower quarter of the internal cavity of the membrane tank, which is made in the form of a tube with a spray at the end, the other end of the tube is connected inside the distribution head with an air supply pipe, the air duct pipe is placed coaxially with the mounting pipe and passes through it and the upper pipe of the membrane tank with a gap and ensures free passage of air between the walls of the pipe and the pipe, while the atomizer It has a shape with smoothed corners, which excludes damage to the membrane in the tank.

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