RU2335460C1 - Device for water media decontamination - Google Patents

Abstract

FIELD: chemistry; mechanics.

SUBSTANCE: device for water media decontamination includes sealed duct with inlet and outlet nipples and partitions dividing inner volume into a number of sections, with decontamination modules containing irradiation elements and positioned inside the sections. Decontamination modules feature sealed section caps and are positioned in each section, except the first and the last ones. The partitions feature bends directed along the flow course and are fastened in line to the duct bottom and section cap, with the last partition fixed hermetically on the inner duct surface. Ratio of the duct cross-section parts screened by partition and open for water flow is defined by relation of partition height h and open part height b by the formulae: b=(0.25÷1.50)×h; b+h=H, where H is the duct wall height.

EFFECT: increased decontamination efficiency at minimum head and hydraulic friction loss.

5 cl, 1 dwg

Description

The invention relates to devices for the treatment of domestic, industrial and wastewater using ultraviolet radiation and can be used for the treatment of natural and wastewater, in utilities, medicine, in the chemical industry, agriculture, etc.

A known installation for disinfecting water, including a housing with nozzles for supplying source water and discharging treated water, an ultraviolet germicidal lamp with a protective quartz cover and a spiral, in the housing of which an additional reflector is installed opposite the inlet pipe, and the spiral is made so that its outer diameter is equal to the inner diameter of the housing and with a step forming a passage section of at least the passage section of the inlet pipe, and mounted on guides mounted on a removable flange, with this inner diameter of the spiral is 1.5-1.7 times larger than the outer diameter of the quartz cover (RF patent No. 2182129, C02F 1/32, C02F 103: 02, publ. 2002.05.10).

The disadvantage of this device is that the practicality of its practical use is limited to single-tube installations. Therefore, it is unsuitable, in particular, for disinfection systems of large flows of water - 100 m ³ / h or more, at low pressures less than 0.05 MPa.

A device for disinfecting aqueous media is known, comprising a channel through which the disinfectable medium flows and UV radiation sources located therein; at least two transverse partitions are installed inside the channel, the first of which is installed so that it flows between its lower edge and there is a gap at the bottom of the channel, and the upper edge is above the level of the leaking disinfectable medium, and the second is set so that its upper edge is below the level of the disinfecting medium, and these partitions are broken the internal space of the channel into compartments consisting of active and passive compartments, so that in the active compartment, where the UV radiation sources are located, the disinfected stream moves from the bottom up, and in the passive compartment the specified stream rotates 180 °. At the same time, UV radiation sources are protected by casings made of a polymer film that is highly hydrophobic and permeable to UV radiation, and disinfectant flow turbulators are installed between the UV radiation sources in the active compartment, and their number depends on the number of sources and is determined by the ratio:

where t is the number of turbulators; n is the number of sources of UV radiation.

UV radiation sources and flow turbulators are mounted vertically and combined into blocks by fixing their ends in openwork plates. The turbulators are made in the form of screws (RF patent No. 2077497, C02F 1/32, publ. 1997.04.20).

The main disadvantage of the described device is the presence of passive compartments, which greatly complicates and increases the cost of using this device in practice. The device is intended for leaking water disinfection systems and therefore has limited applicability. An essential point of this invention is the availability of turbulators in the form of screws located between the irradiators. However, this complication of disinfection systems can only be justified for cases of a very low degree of wastewater treatment supplied to the disinfection unit. In general, when replacing polymer covers with quartz, this device can only be used in open channels for disinfection of wastewater with increased pollution.

The subject of this invention is a device for disinfecting aqueous media, which is a sealed channel with inlet and outlet nozzles. The channel is divided into sections by partitions, alternately overlapping part of the channel section from above and from below. The last partition is sealed at the bottom of the channel so that its upper edge is not lower than the upper level of the radiating surface of the radiating elements. This protects the lamps from failure due to overheating in the event of a possible stop of the movement of water in the channel. In each section, except the first and last, there is a disinfection module. The design of the sections provides sealing of the entire channel, which makes the installation pressure head. Bactericidal elements (lamps) in the module are located so that the axis of the elements of each next row in the plane perpendicular to the axis of the channel are located between the axes of the previous row. The combination of such an arrangement of bactericidal lamps and an arrangement of partitions, which sets an alternating change in the direction of flow from top to bottom and back, creates the conditions for complete mixing of the disinfected water and thereby the optimal use of the bactericidal flow of irradiators. The ratio between the part of the channel cross section closed by the partition and the part of the channel open for movement of water is determined by the ratio of the height of the partition h and the height of the open part b according to the formulas:

b = (0.25 ÷ 1.50) × h; b + h = H, where H is the height of the channel walls.

The boundaries of the range of numbers enclosed in parentheses are defined so that when the first number in parentheses decreases (0.25), a rapid increase in pressure losses will occur due to the overlap of the total cross-section of water movement in the installation case. With an increase in the second number (1.5), the mixing effect is lost. The first section does not contain a module and serves to stabilize the movement of water in the channel. The last section does not contain a module and protects the lamps from overheating during an emergency stop of the movement of water.

The solution to the technical problem is ensured by the fact that in the device for disinfecting aqueous media containing the inlet and outlet nozzles and a sealed channel for the flow of the disinfected medium with partitions dividing the internal space of the channel into a series of sections with disinfecting modules placed in them containing irradiating elements, the disinfecting modules are placed in each section, except the first and last; modules are made with sealed sections covers; partitions are made with bends in the direction of flow. Partitions are installed so that water flows around them alternately, from above and from below, while the last partition is sealed on the inner surface of the channel. The ratio between the part of the channel section closed by the partition and the part of the rocking section open for movement of water is determined by the ratio of the height of the partition h and the height of part b open for the movement of water according to the formulas:

b = (0.25 ÷ 1.50) × h; b + h = H,

where H is the height of the channel walls.

The irradiating elements (lamps) in the module are located so that the axis of the elements of each next row in the plane perpendicular to the axis of the channel are located between the axes of the previous row.

The height of the last partition, sealed at the bottom of the channel, is selected so that its upper edge is not lower than the upper level of the radiating surface of the radiating elements.

Partitions streamlined by water, except for the last along the course of the movement of water, have passageways at the attachment point for draining water from all sections except the last along the course of water.

The device has two nozzles for draining water: from all sections, except the last along the water, and separately from the last section.

The invention is illustrated in the drawing, which shows a diagram of the installation of disinfection of water.

The device comprises an inlet pipe (1), an inlet compartment (2) that does not contain bactericidal lamps, partitions (3), lamps (4) placed in quartz housings (5), an outlet compartment (9) and an outlet pipe (10). Quartz housings (5) are hermetically fixed to the covers (6). The covers (6) have a tight connection between themselves and with the walls of the housing (7) of the installation. On the surface of the covers are fixed power supply units (8) for bactericidal lamps. The device is equipped with a bactericidal radiation intensity sensor (11), nozzles with taps (12) for flushing the system, (13) for sampling, (14) for draining water. For a more thorough cleaning of the quartz housings, a separate flushing device is provided.

The device operates as follows. The flow of disinfected water is supplied to the inlet pipe (1). The inlet compartment (2), which does not contain bactericidal lamps, serves to exclude the influence of fluctuations in the water level in the inlet pipe on the operation of the device. Next, the water enters the working volume of the device. Alternately flowing around the partitions (3) and passing between the lamps (4) placed in quartz housings (5), the water constantly changes the direction of movement, so that on average all small volumes of water receive the same dose of bactericidal radiation. The fulfillment of this condition ensures the optimal use of the bactericidal energy of the irradiators (4). Quartz housings (5) are hermetically fixed to the covers (6). Covers (6) are hermetically sealed to the housing (7) of the installation. The bactericidal lamp power supply units (8) are mounted on the housing. After passing through the working volume, water enters the outlet compartment (9). The role of this compartment is to provide a level of water that closes bactericidal lamps, regardless of the mode of water supply from the external network. This prevents the lamps from overheating and premature failure. From the compartment (9) through the outlet pipe (10), disinfected water enters the external network. The device is equipped with a bactericidal radiation intensity sensor (11), nozzles with taps (12) for flushing the system, a tap (13) for sampling, nozzles with a plug (14) for draining water. For a more thorough cleaning of the quartz housings, a separate flushing device is provided.

Claims (5)

1. A device for disinfecting aqueous media, containing the inlet and outlet nozzles and a sealed channel for the flow of the disinfected medium with partitions dividing the internal space of the channel into a series of sections with disinfection modules containing irradiating elements, characterized in that the disinfecting modules are located in each sections, except the first and last; modules are made with sealed sections covers; the partitions are made with bends in the direction of flow and are attached alternately to the bottom of the channel and to the cover of the section, while the last partition is sealed on the inner surface of the channel; the ratio between the part of the channel section closed by the partition and the part of the channel section open for water movement is determined by the ratio of the height h of the partition and the height b of the part open for water movement according to the formulas b = (0.25 ÷ 1.50) × h; b + h = H, where H is the height of the channel walls. 2. The device according to claim 1, characterized in that the bactericidal elements in the module are located so that the axis of the elements of each next row in a plane perpendicular to the axis of the channel are located between the axes of the previous row, 3. The device according to claim 1, characterized in that the height of the last partition, sealed tightly to the bottom of the channel, is selected so that its upper edge is not lower than the upper level of the radiating surface of the radiating elements. 4. The device according to claim 1, characterized in that all partitions attached to the bottom of the channel, except the last along the course of the movement of water, have passageways at the attachment point for draining water from all sections except the last along the course of the water. 5. The device according to claim 1, characterized in that it has two nozzles for draining water from all sections, except the last along the water, and separately from the last section.