RU2663746C1 - Water purification plant - Google Patents

Abstract

FIELD: water and air purification technology.SUBSTANCE: invention relates to the field of water purification and water treatment, and can be used for purification of drinking, technical and waste water for drinking and household, industrial and agricultural water supply on filtering plants, jointly using the ozone treatment and sorption processes. Water purification plant comprises contact-filtering vessel 1 with the activated carbon 2 granular charge and drainage-distribution system 4, ozone-water mixture ejector 6, level sensors unit 7, ozone destructor 8, water for purification supply pipeline 13, water for rinsing supply pipeline 16, purified water discharge pipeline 23, bypass pipeline 20, pump 21 and shut-off devices 15, 17, 19, 22, 24, rinse water discharge pipeline 26, ozone generator 9 with ozone supply pipeline 10 and electrically connected to the level sensors unit 7, ozone generator 9, pump 21 and shut-off devices 15, 17, 19, 22, 24 control unit 27. Contact-filtering vessel 1 under the activated carbon 2 granular charge is provided with supporting gravel layer 3 and rinsing ejector 5. Drainage distribution system 4 is located in the gravel layer 3. In the upper part the contact-filtering vessel 1 is provided with the residual ozone 11 return line connected to the ozone supply pipeline 10, and connected to the rinsing ejector 5 air discharge line 12. Rinsing water supply pipeline 16 is provided with the discharge pipeline 18 with shut-off device 19. Discharge pipeline 18 is connected to the rinsing ejector 5.EFFECT: invention allows to increase the ozone use degree and the filtering charge regeneration degree while reducing the rinsing water flow rate.6 cl, 1 dwg

Description

The invention relates to the field of water purification and water treatment and can be used for the treatment of drinking, industrial and wastewater for domestic, industrial, and agricultural water supply in filtering plants using jointly ozonation and sorption processes.

One of the most effective methods for removing hardly oxidizable organic compounds from water is the joint use of ozone and activated carbon. In the process of working with activated carbon filters, which is used as a granular charge, a biofilm is formed on the surface of granular activated carbon during ozonation of the water being treated, and carbon filters actually start working as active carbon biofilters. It is known that with the combined use of ozone and activated carbon, the sorption capacity of coal and its duration before regeneration significantly increase. In addition, preliminary ozonation of water can increase the filtration rate / Methodological recommendations for ensuring compliance with sanitary rules and norms SANPIN 2.1.4.559-96 “Drinking water. Hygienic requirements for water quality of centralized drinking water supply systems. Quality Control ”at waterworks during the purification of natural waters. Gosstroy of Russia. Scientific research institute of municipal water supply and water purification, under the guidance of Doctor of Technical Sciences V.L. Draginsky, MDS 40-3.2000, p. 24-26 /.

However, over time, which depends on the degree of contamination and the amount of water being treated, the filtration capacity of activated carbon decreases, which leads to the need for its regeneration. The better the regeneration of the granular filter load, the higher the service life of the water treatment plants using them.

A known method of regenerating a granular filter load, according to which the wash water stream is saturated with an ozone-air mixture, the granular load is fed by pulsed water saturated with pulses of water, followed by the removal of washed out contaminants. The known method is implemented in the installation for water purification with an open quick filter, which includes a housing with a granular load located in it with a supporting gravel layer with a drainage distribution system located in it, pipelines for the treatment of treated water, supply of washing water, gas-liquid emulsion, filtrate discharge and drainage of wash water. To obtain an ozone-air mixture, an ozone generator is used, to create pulses of a saturated ozone-air mixture of washing water, a pulsator is used to loosen the granular load, and a washing pump and storage tank are provided for washing it / USSR Author's Certificate No. 1472090, B01D 23/24, 1989 / .

The disadvantages of this installation are the high flow rate of the wash water, as well as the unjustified energy costs of producing the ozone-air mixture due to the discharge into the atmosphere of that part of it that did not react with the wash water.

Closest to the proposed one is a water treatment plant comprising a water supply pipe for purification, a purified water discharge pipe, an ozone pipe from an ozone generator, a wash water pipe, a bypass pipe with a non-return valve, a pump, a contact filter container containing an ejector, located in its upper part, activated carbon granular filter located in its lower part, drainage system located under the carbon filter, level sensor block, four locking devices and installed on the pipelines for supplying water for purification and in the ejector, on the bypass and piping for treating purified water, a control unit connected to the level sensor block and to the control circuits of the ozone generator, pump and shut-off devices, the ozone supply pipeline from the ozone generator is connected to an ejector, an ozone destructor installed in the upper part of the contact filter tank, the wash water discharge pipe is connected to a drain from the upper part of the contact filter tank through a water seal / RF Patent Handy model №94968, C02F 1/78, 2010 /.

The disadvantages of the known installation are the high consumption of washing water, the low efficiency of the regeneration of the granular charge from activated carbon, as well as the low degree of use of ozone.

The technical problem is to create an economical installation with a high degree of water purification and an increased duration of the filter cycle.

The technical result from the use of the proposed installation for water purification is to increase the degree of utilization of ozone and the degree of regeneration of the filter load while reducing the flow rate of wash water.

The technical problem is solved, and the technical result is achieved due to the fact that in the installation for water purification containing a contact filter tank with a granular charge of activated carbon and a drainage distribution system located in its lower part, with an ozone-water ejector located in the upper part of the tank mixture, a block of level sensors and an ozone destructor, a water supply pipe for cleaning with a shut-off device installed on it, connected to an ozone-water mixture ejector, a water supply pipe for flushing with a shut-off device installed on it and connected to the purification water supply pipe and drainage distribution system, a purified water drain pipe with a shut-off device installed on it, a bypass pipeline with a pump and shut-off device installed on it, connected to the drainage-distribution system , a purified water discharge pipe and an ozone-water ejector, a wash water removal pipe, an ozone generator with an ozone supply pipe connected to an ozone-water ejector mixtures, and the control unit, connected by electrical connections to the level sensor block, ozone generator, pump and shut-off devices, the contact-filter tank under the granular activated carbon charge is equipped with a supporting gravel layer and a washing ejector, the drainage distribution system is located in the gravel layer, contact -the filter tank is equipped in the upper part with a residual ozone return line connected to the ozone supply line and an air exhaust line connected to the ezek Oromo rinsing and the water supply line is provided for washing the discharge duct mounted with a shut-off device and connected with an ejector washing, while in use electromagnetic valves as locking devices.

It is preferable that flexible silicone hoses are used as the lines for returning the residual ozone and air exhaust.

Preferably, the installation is performed in block execution.

The drawing shows a schematic representation of the installation for water treatment.

The filtering water purification installation comprises a contact-filter container 1 with a granular layer of activated carbon 2 and a support layer of gravel 3, in which a drainage distribution device 4 and a washing ejector 5 are located. An ozone-water mixture ejector 6 is located in the upper part of the contact-filter tank 1 , a level sensor 7 and an ozone destructor 8. The installation contains an ozonizer 9, which is connected through an ozone supply line 10 to an ejector 6. In the upper part of the contact-filter tank 1 are located excess ozone return line 11 connected to the ozone supply line 10, and an air exhaust line 12 connected to the flushing ejector 5. The installation includes a purification water supply line 13 with a valve 14 and a shut-off device 15 connected thereto, connected to the ozone-water mixture ejector 6 and a water supply pipe for flushing 16 with a shut-off device 17 mounted thereon, connected to a drainage distribution device 4 and provided with an outlet pipe 18 with a shut-off device 19 mounted thereon and connected ennym washing with ejector 5.

A bypass pipe 20 with a pump 21 and a shut-off device 22 is connected to a drainage-distributing device 4, an ozone-water mixture ejector 6 and a purified water drain pipe 23 with a shut-off device 24 and a valve 25 installed on it. In the upper part, a contact-filter tank 1 is connected to the pipeline rinse water 26. The control unit of the installation 27 is connected by electrical connections with the level sensor block 7, an ozone generator 9, a pump 21 and shut-off devices 15, 17, 19, 22 and 24 installed on the pipelines water supply for purification 13, water supply for flushing 16, bypass pipe 18, bypass pipe 20 and purified water drain pipe 23, respectively. Solenoid valves are used as shut-off devices, and the excess ozone return line 11 connected to the ozone supply line 10 and the air exhaust line 12 connected to the flushing ejector 5 are made of a flexible silicone hose.

Installation works as follows.

In the mode of water treatment - filtration - the control unit of the installation 10 includes an ozonizer 9 and a shut-off device - an electromagnetic valve 15, on the water supply pipe for treatment 13 open the valve 14. All other shut-off devices are closed. The source water through the water supply pipe for purification 13 is supplied to the ozone-water mixture ejector 6, creating a vacuum in it, due to which the ozone-air mixture formed during its operation enters the ozone-water mixture ejector 6 from it. In the ejector of the ozone-water mixture 6, the initial water supplied for purification is mixed with ozone, the obtained ozone-water mixture enters the contact-filter tank 1 and fills it to the upper level adjuster of the level 7 sensor block, when it closes, the electromagnetic valve 15 closes and the ozonizer 9 turns off .

In the contact-filter tank 1, due to the interaction of ozone with chemical compounds contained in the initial water supplied for purification, the oxidation of metal cations (iron, manganese, etc.) takes place, their transition into water-insoluble compounds, degradation of organics, and disinfection of pathogenic microflora . When you turn on the consumption of purified water, open the tap 25 and turn on the solenoid valve 24 on the purified water discharge pipe 23 and pump 20, while the ozonated water passes sequentially a layer of granular load from activated carbon 2 and a supporting layer of gravel 3 and through a drainage distribution device 4 through a pipeline drainage of purified water 23 is supplied to the consumer.

Filtration through a layer of granular charge from activated carbon allows you to remove suspended particles of water-insoluble compounds, in particular salts of heavy metals, and remove excess unreacted ozone from the ozone-water mixture. Unreacted ozone through the return ozone return line 11 enters the ozone supply line 10 and into the ozone-water mixture ejector 6 to increase the ozone concentration in the ozone-water mixture at the outlet of the ejector 6, as well as to the ozone destructor 8, from where it is emitted to the atmosphere. When the water level in the contact-filter tank 1 decreases to the lower level master of the level sensor block 7, the electromagnetic valve 15 is opened, the ozonizer 9 is turned on, the electromagnetic valve 24 is closed, the filling cycle of the contact-filter tank 1 is repeated and a new portion of the source water is again contacted with ozone with the purpose of cleaning and disinfection.

Due to the recycling of residual ozone and its repeated involvement in the process, the oxidation depth of the chemical compounds contained in the source water increases, which leads to an increase in their ability to linger during subsequent filtration.

As the quality of purified water decreases due to a decrease in the filtration capacity of activated carbon, it becomes necessary to regenerate it. Regeneration is carried out by two-stage washing - reverse and direct - as follows.

Backwash. The solenoid valves 15 and 24 are closed, the ozonizer 9 is turned off. The solenoid valve 17 is opened. The source water through the water supply pipe for purification 13 and the water supply pipe for flushing 16 connected to it is fed through a solenoid valve 17 to a drainage distribution system 4. The solenoid valve 17 operates in a cyclic mode (open - closed), during which it increases periodically during closing pressure in front of the drainage distribution system 4, and when opened due to high pressure, pulsed shaking of the packed layer of activated carbon 2 occurs, which increases the efficiency of regeneration. Wash water by gravity is removed from the contact-filter tank 1 through the pipe drain water 26. Then carry out air-water washing. The solenoid valve 17 on the flush water supply pipe 16 is closed, and the solenoid valve 19 on the bypass pipe 18 is opened. The source water supplied to the flushing passes through the solenoid valve 19 and enters the flushing ejector 5, in which a vacuum is created, due to which from the upper part of the contact-filter tank 1 to the flushing ejector 5 along the air exhaust pipe 12 made of a flexible silicone hose air comes in. An intensive washing of the activated carbon layer occurs, in which the water level in the contact-filter tank 1 rises and the wash water, along with washed flakes of iron, manganese and other contaminants, is gravity removed from the contact-filter tank 1 through the wash water discharge pipe 26.

After the backwash, a direct flush is carried out, since the source water remains in the contact-filter tank 1, which must be replaced with ozonized water before being supplied to the consumer. In this case, the electromagnetic valve 19 is closed, the electromagnetic valve 22 mounted on the bypass pipe 20 is opened. The solenoid valves 15 and 17 are closed. Ozonator 9 include. A pump 21 mounted on a bypass pipe 20 connected to a drainage distribution device 4 through an activated carbon layer 2, a support layer of gravel 3 and a drainage distribution device 4 delivers water from the contact-filter tank 1 through an electromagnetic valve 22 and an ozone-water mixture ejector 6 into it. Moreover, in the ejector 6 there is a mixture of circulating water with ozone. In the process of direct washing, the removal of washing water from the contact-filter tank 1 is not performed, which reduces the total amount of water going to the washing. After direct flushing is completed, the installation is ready for operation, which means bringing all its elements to the position for filling the contact-filter tank 1.

The block design of the installation allows you to mount it on one frame, which greatly simplifies and speeds up its installation.

The use in the proposed installation of pulsed regeneration of the granular charge from activated carbon 2 due to the cyclic mode of operation of the electromagnetic valve 17, as well as the washing ejector 5, installed below the granular charge from activated carbon 2 and providing intensive air-to-air flushing due to recirculation of the air extracted during the flushing, allows increase the degree of regeneration of the filter load while reducing the flow rate of wash water. In addition, due to the recycling of ozone initially unreacted with the treated water, the costs of its production are reduced.

Thus, the claimed installation for water purification with a high degree of water purification due to the recirculation of residual ozone and its re-involvement in the oxidation process, followed by filtration of the ozonized purified water and a high degree of regeneration of the filter charge due to the effective restoration of the (filtration) sorption properties of activated carbon while profitability due to recirculation of ozone and reducing the consumption of flushing water.

Claims (6)

1. Installation for water purification, comprising a contact-filter container with a granular loading of activated carbon and a drainage distribution system located in its lower part, with an ozone-water mixture ejector located in the upper part of the tank, a block of level sensors and an ozone destructor, a water supply pipeline for cleaning with a shut-off device installed on it, connected to an ozone-water mixture ejector, a flushing water supply pipe with a shut-off device installed on it, connected to a pipeline m of water supply for treatment and a drainage distribution system, a purified water drainage pipe with a locking device installed on it, a bypass pipe with a pump and a locking device installed on it, connected to a drainage distribution system, a purified water drainage pipe and an ozone-water ejector, a drainage pipe washing water, an ozone generator with an ozone supply pipe connected to an ozone-water mixture ejector, and a control unit connected by electrical connections to the level sensor unit, ozone generator, pump and shut-off devices, characterized in that the contact-filter tank under the granular activated carbon charge is equipped with a supporting gravel layer and a washing ejector, the lower drainage-distribution system is located in the gravel layer, the contact-filter tank is equipped with a return line in the upper part residual ozone connected to the ozone supply pipe and an air exhaust pipe connected to the washing ejector, and the washing water supply pipe wives a bypass pipe with a shut-off device mounted on it, connected to a flushing ejector. 2. Installation for water purification according to claim 1, characterized in that solenoid valves are used as shut-off devices. 3. Installation for water purification according to claim 1, characterized in that a flexible hose is used as a return line for residual ozone. 4. Installation for water purification according to claim 1, characterized in that a flexible hose is used as an air exhaust pipe. 5. Installation for water purification according to claim 3 or 4, characterized in that the flexible hose is made of silicone. 6. Installation for water purification according to claim 1, characterized in that it is made in block execution.

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