RU2238782C2 - Device for water treatment - Google Patents

Abstract

FIELD: purification of water in power engineering.

SUBSTANCE: the invention is dealt with a device for a water treatment and may be used for purification of water from dissolved impurities in power engineering. The device includes two sealed tanks for degassing and a container for collection of the treated water, placed vertically one over another. The pump delivers untreated water through a shutter into the upper tank for degassing. Withdrawal of the vented steam is exercised using a branch pipe through a shutter located above the upper tank for degassing. The tanks for degassing as well as the container for collection of treated water are fused among themselves by pipelines, on which shutters are mounted. The surface of water in the container for collection of purified water is covered by a flexible film. The purified water is removed from the container used for collection of treated water with the help of a pump. The device also contains a pipeline, on which there is a pump for transmission of water from the lower tank for degassing into the upper tank for degassing. The technical result of the device is maintenance of deep degassing of water at small power consumption.

EFFECT: the invention allows to provide a deep degassing of water at small power consumption.

2 cl, 4 dwg

Description

The invention is intended to purify water from dissolved impurities and may find application in the energy sector.

Known vacuum deaerator (AS USSR No. 861329), containing a horizontally mounted cylindrical body with nozzles for supplying a heating medium, in the upper part of which there is a collector of deaerated water. The collector is separated from the downstream mixing chamber and the vaporization compartment adjacent to the side walls of the housing and the chamber by means of a perforated sheet. In the housing on the other side of the chamber, a second vaporization compartment is made adjacent to the side wall of the housing.

The disadvantage of this deaerator is the high energy costs of creating a vacuum, insufficient removal of dissolved gases and the inability to remove salts dissolved in it from water.

Known deaerator (AS USSR No. 992430), containing cylindrical columns mounted on the storage tank, each of which has a water supply pipe. The deaerator is equipped with cylindrical columns and a separation compartment, which is formed by vertical partitions installed between the columns.

The disadvantages of this deaerator are that it does not provide the removal of salts dissolved in water and the deaeration process is associated with high energy costs associated with the need to use a heating medium with a relatively high temperature.

The closest in essence to the claimed is a deaerator (RF patent No. 2078047), containing a storage tank associated with columns, each of which has a pipe located in the tank. Each nozzle is equipped with valves. The pump delivers untreated water to the tank through a pipeline. Purified water is pumped out of the tank using a pump. The storage tank is provided with at least one hopper. The column is made with the formation of the hopper. A heat exchanger is placed in the volume of the storage tank above the hopper. The deaerator also contains a steam ejector, a nozzle for supplying an active medium, a branch pipe for venting the vapor, an additional compartment and a separation compartment, the lower parts of the compartments are equipped with valves and are located in the tanks. A heat exchanger is located in the steam volume of the compartment.

The disadvantage of the prototype is the relative complexity of the design and the need for energy to remove the vapor from the degassing tank.

The present invention eliminates the noted disadvantages. This is achieved by the fact that in the proposed device for water treatment, containing at least two sealed tanks for degassing and a container for collecting purified water, a source pipe for supplying raw water and a pipe for removing purified water, as well as an outlet pipe for vapor removal, installed on it a valve according to the invention, degassing tanks and a container for collecting purified water are arranged vertically one above the other and connected by pipelines to the valves. Untreated water is supplied to the upper tank for degassing through a pipeline using a pump through a valve. On the surface of the water in the tank, there is a flexible film. The distance between the water level in the upper degassing tank and the water level in the tank for collecting purified water corresponds to the atmospheric pressure, expressed in meters of water column. The purified water is removed from the tank for collecting purified water through a pipeline using a pump.

The proposed device also contains a pipeline on which a pump is installed for pumping water from the lower tank for degassing to the upper, for deeper degassing.

The invention is illustrated graphically in figures 1-4.

Figure 1 schematically shows the proposed device for water treatment.

Figure 2 schematically shows the proposed device, which also includes a pipeline with a pump installed on it.

Figure 3 graphically shows the water level in the proposed device in a state of starting operation.

Figure 4 shows the water level in the proposed device in the state of the beginning of the degassing process.

The device includes two sealed tanks for degassing 1 and 2 and a container for collecting purified water 3, located vertically above each other. A pump 4 is installed on the pipeline supplying the source water, a pump 5 is installed on the pipeline for removing purified water. The outlet of the vapor is carried out through a pipe through a valve 6. The degassing tanks 1 and 2, as well as the container for collecting purified water 3 are connected by pipelines, on which the valves 7 and 8 are installed, respectively. The feed water is supplied through the valve 9. The surface of the water, which is located in the container for collecting purified water 3, is closed by a flexible film 10 (Fig. 1).

The device also includes a pipeline on which a pump 11 is installed for pumping water from the degassing tank 2 to the degassing tank 1 (FIG. 2).

The device can work as follows.

With open valves, the entire system is filled with water. After filling the container for collecting purified water 3, the valve 8 closes and the degassing tanks 1 and 2 are filled. The air in the system is removed through the valve 6 (Fig. 3). Then the valves 6 and 9 are closed, and the valves 7 and 8 are opened. From the degassing tank 1, water is discharged to the required level (Fig. 4). When the water level in the degassing tank 1 drops below the 10 meter mark (counted from the surface of the water in the tank for collecting purified water 3), a “torichel void” is formed above the water surface in the degassing tank 1, filled with saturated water vapor. Since the temperature of this vapor is close to the ambient temperature (the walls of the tank are thermally conductive), the saturation temperature is approximately equal to the ambient temperature. Therefore, for example, at an ambient temperature of 28.6 ° C, the saturation pressure will be 0.04 bar. It is known that, in accordance with Henry's law, the solubility of gases is directly proportional to pressure. Since when the valve 6 is opened, the pressure decreases by a factor of 250, the solubility of gases in water decreases, so the gases are released from the water volume and move into the volume of saturated steam above the surface of the liquid.

After that, the valve 8 closes and the valves 6 and 9 open. The water entering the degassing tank 1 displaces the mixture of gases and steam into the atmosphere. The process is then repeated.

The device can also work as follows.

After intensive evolution of gases that accumulate together with saturated water vapor in the degassing tank 1 above the surface of the water, the valve 8 closes and the valve 6 opens. The degassing tank 1 is filled with water from the degassing tank 2 with pump 11 and air 2 is removed from the system through the valve 6 The degassing process proceeds according to the above scheme.

The principle of operation of the device is based on the fact that any system when changing any parameters necessarily comes into equilibrium.

Therefore, the “toricellum void” formed in the degassing tank 1 will be filled with saturated steam with a pressure corresponding to the saturation temperature, i.e. essentially ambient temperature.

The device provides deep degassing of water at low energy costs, due to which a technical and economic effect is achieved.

Claims (2)

1. A device for treating water, comprising at least two tanks for degassing and a container for collecting purified water, a branch pipe for evaporating, pipelines for supplying raw water and removing purified water with valves installed on them and pumps for pumping water, characterized in that the tanks for degassing and a container for collecting purified water are arranged vertically one above the other, while the water is introduced into a tank for degassing, placed in a vertical plane above other tanks for degassing and a container for collecting purified water, Water from the upper degassing tank is connected to the entrance to the degassing tank located underneath, and the water outlet from the last degassing tank is connected to the entrance to the treated water collection tank, on the surface of the water, a flexible film is placed on the purified water collection tank , on the pipelines connecting the degassing tanks and the tank for collecting purified water, valves are installed, and the outlet pipe of the vapor is placed on the cover of the upper degassing tank. 2. The water treatment device according to claim 1, characterized in that the degassing tanks are additionally connected by a pipe on which a pump is installed for pumping water from the lower degassing tank to the upper.

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