RU2397801C2 - Device and method for collection of aerosol particles and their concentration definition - Google Patents

Device and method for collection of aerosol particles and their concentration definition Download PDF

Info

Publication number
RU2397801C2
RU2397801C2 RU2008125809/15A RU2008125809A RU2397801C2 RU 2397801 C2 RU2397801 C2 RU 2397801C2 RU 2008125809/15 A RU2008125809/15 A RU 2008125809/15A RU 2008125809 A RU2008125809 A RU 2008125809A RU 2397801 C2 RU2397801 C2 RU 2397801C2
Authority
RU
Russia
Prior art keywords
liquid
sorbing
cyclone
aerosol particles
air
Prior art date
Application number
RU2008125809/15A
Other languages
Russian (ru)
Other versions
RU2008125809A (en
Inventor
Александр Данилович Толчинский (RU)
Александр Данилович Толчинский
Юнвоо НАМ (KR)
Юнвоо НАМ
Киоунг Хо КАНГ (KR)
Киоунг Хо КАНГ
Владимир Иванович Сигаев (RU)
Владимир Иванович Сигаев
Александр Николаевич Варфоломеев (RU)
Александр Николаевич Варфоломеев
Алексей Антонович Мажинский (RU)
Алексей Антонович Мажинский
Павел Константинович Соловьев (RU)
Павел Константинович Соловьев
Вадим Викторович Бунин (RU)
Вадим Викторович Бунин
Original Assignee
Самсунг Электроникс Ко., Лтд.
Федеральное Государственное Учреждение Науки "Научно-Исследовательский Центр Токсикологии И Гигиенической Регламентации Биопрепаратов" Федерального Медико-Биологического Агентства Российской Федерации
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Самсунг Электроникс Ко., Лтд., Федеральное Государственное Учреждение Науки "Научно-Исследовательский Центр Токсикологии И Гигиенической Регламентации Биопрепаратов" Федерального Медико-Биологического Агентства Российской Федерации filed Critical Самсунг Электроникс Ко., Лтд.
Priority to RU2008125809/15A priority Critical patent/RU2397801C2/en
Priority claimed from US12/327,210 external-priority patent/US7964018B2/en
Publication of RU2008125809A publication Critical patent/RU2008125809A/en
Application granted granted Critical
Publication of RU2397801C2 publication Critical patent/RU2397801C2/en

Links

Images

Abstract

FIELD: mechanics.
SUBSTANCE: invention is intended for collection of aerosol particles and their concentration definition. The device contains a cyclone consisting of a turbulence chamber with a tangential intake nipple and a deposition chamber, the sorbent liquid reservoir, the recirculating sorbent liquid collector and a return pipe for delivery of the sorbent liquid collected in the collector to the reservoir. The intake nipple contains two cylindrical channels positioned vertically one under the other and having a common conic nozzle on the inlet side. The reservoir is represented by a detachable cartridge mounted on the cyclone outer wall. The method includes stages of delivery of clean sorbent liquid into the cartridge, collection of aerosol particles with the sorbent liquid, sampling the sorbent liquid contained in the cartridge, contamination level measurement, drain of sorbent liquid from the cartridge when the contamination level exceeds the value preset and replenishment of the cartridge with a new portion of clean sorbent liquid. The stage of aerosol particles collection includes mixture of sprayed sorbent liquid and air in the inlet nipple and delivery of the mixture into the cyclone, catching aerosol particles with a sorbent liquid film and collection of the letter, delivery of the collected sorbent liquid into the inlet nipple for re-mixture with air.
EFFECT: improved efficiency of aerosol particles collection and reduced loss of recirculating sorbent liquid.
36 cl, 6 dwg

Description

BACKGROUND OF THE INVENTION

FIELD OF THE INVENTION

The present invention relates to a device and method for collecting and determining the concentration of aerosol particles, in particular to a device for collecting aerosol particles, which uses the principle of "wet" cyclone, collecting aerosol particles from the inlet air stream to a rotating liquid film of a sorbing liquid, and determines the degree of contamination sorbing liquid, and to a method for implementing this process.

State of the art

The ambient air usually contains suspended particles, such as microorganisms, dust, etc., in suspension. ("aerosol particles") that can cause human disease. In particular, the air environment of crowded indoor spaces, such as spaces of office, administrative buildings, metro, etc., is characterized by high concentrations of aerosol particles of the most diverse nature. Therefore, for the purposes of operational control, it is imperative to measure the level and composition of air pollution in the interior. To ensure such control, it is necessary, first of all, to take a reliable sample of aerosol particles.

As is known, processes such as gravitational and inertial deposition, filtering, electrification, and condensation are used to collect aerosol particles.

The main principle used to create modern devices for collecting aerosol particles is the deposition due to inertial forces. There are many devices, such as impingers, impactors, and cyclones, which operate based on the principle of inertial particle capture. This principle makes it possible to very effectively and reliably capture aerosol particles in a wide range of sizes and concentrations both on solid substrates and in a liquid medium.

Known aerosol sampler that simulates the lungs of a person and designed to analyze aerosol particles that are sucked together with the external air flow into the bubbler using a vacuum pump.

An individual cyclone-based sampler, an automatic pulverized coal sampler, and others are known.

However, known samplers essentially do not collect aerosol particles into a liquid medium, since the principles of electrification, condensation, or filtration are used to measure the parameters of aerosol particles. Thus, the known samplers are not designed to collect aerosol particles in a liquid medium, as a result of which the efficiency of capture and the possibility of analysis, for example microbiological analysis, are usually low.

A device for collecting aerosol particles of microbiological origin using a cyclone. The basic principle of the device’s operation is based on the inertial deposition of aerosol particles from the vortex air stream onto a liquid film formed on the inner wall of the vortex chamber by recirculation of the sorbing liquid. The liquid film rises in a spiral along the inner wall of the collecting column, coaxially connected to the vortex chamber, and accumulates in the tank.

SUMMARY OF THE INVENTION

The present invention is intended to solve the aforementioned problems encountered in the prior art, and the aim of the invention is to provide a device for collecting aerosol particles, in particular microbes, in a liquid medium in which external air and a sorbing liquid efficiently enter a cyclone, and the sorbing liquid is reused At the same time, both the sorbing liquid in which the microbes are collected and the external air are effectively separated from each other, thus increasing the collection efficiency robov and minimize the use of absorbing fluid at maximizing the viability of collected microorganisms.

To achieve the above and other objectives of the present invention, in accordance with an aspect of the present invention, there is provided a device for collecting aerosol particles, comprising: a cyclone consisting of a vortex chamber with a tangentially introduced inlet intake pipe and a deposition chamber, the base of which is connected to the upper part of the vortex chamber, a recirculating collector sorbing liquid in the upper part of the cyclone, a reservoir for sorbing liquid connected by means of a suction fitting and a return pipe to the collector circulating fluid, in addition, having an outlet drain fitting; a sorbing liquid atomizer with a liquid ejector in the form of a nozzle in the first internal channel of the intake intake pipe, the first internal channel of the intake pipe having a stepwise change with a smaller diameter from the intake side of the intake pipe and an ejector liquid nozzle located in the part of the internal channel of the intake pipe with a large diameter at the point of stepwise diameter change and connected by a liquid ejector tube to the reservoir.

The intake intake pipe has a second internal channel located above the first; however, it has an identical step change with a smaller diameter from the inlet side of the intake pipe, and the nozzle-shaped air ejector is located at the step of the diameter change in the part of the channel with a large diameter and is connected via the air ejector tube to the reservoir.

Both internal channels of the intake pipe are connected by a common suction inlet nozzle in the form of a funnel.

Liquid and air ejector nozzles can be formed as openings in the inner walls of the channels of the intake pipe; wherein the geometric center of each nozzle hole is located at a distance of the radius of such a hole from the plane that forms the step in the corresponding internal channel of the intake pipe.

The vortex chamber may be shaped like a cylinder; and the deposition chamber is made in the form of a truncated cone, the larger base of which is connected to the vortex chamber.

The tank can be made in the form of a removable cartridge and is mounted on the outer wall of the cyclone.

The collector may include a separator located at some distance from the upper edge (cut) of the deposition chamber and serving to separate the air and liquid components on the cyclone cut, and a collection tank for the sorbing liquid separated by the separator and the cyclone cover.

The separator can be made in the form, annularly encircling the inner and outer walls of the deposition chamber in its upper part.

The upper part of the separator can be formed as a cylindrical exhaust pipe passing through the cyclone cover and designed to connect the device to an external vacuum pump.

There are openings around the perimeter of the cylindrical outlet pipe under the cyclone cover to divert part of the outlet air stream entering the internal volume of the collector through the gap between the separator and the slice of the deposition chamber.

The bottom of the collection tank can be connected to the return pipe, and the bottom surface can have an inclined groove around the perimeter of the base to drain the sorbing liquid, while the bottom point of the groove is located at the connection point with the return pipe.

A sensor for measuring the level of the sorbing liquid can be connected to the outlet of the tank (cartridge).

A sampling tube supplying an aliquot of the sorbing liquid from the cartridge to the detector, which determines the concentration of aerosol particles mixed in the sorbing liquid, can be connected to the outlet of the cartridge.

The valve regulating the selection of the sorbing liquid can be additionally installed on the sampling tube.

A drain pipe for draining contaminated sorbent liquid to the outside can be connected to the outlet of the cartridge.

Aerosol particles can be microbes.

In accordance with another aspect of the present invention, there is provided a method for collecting and determining aerosol particles, which comprises the following steps: supplying external air and a sorbing liquid to the inner space of the cyclone; mixing the external air and the sprayed sorbing liquid with each other by a cyclone and centrifugal deposition of aerosol particles from the vortex air stream onto a film of sorbing liquid; collecting sorbing liquid containing aerosol particles contained therein; dispersing the collected sorbent liquid for re-mixing with external air.

The liquid recirculation process can be carried out by creating pressure differences in the incoming air stream.

The method may further include the step of sampling an aliquot of the sorbent liquid, directed to determine the concentration of aerosol particles trapped in the sorbing liquid.

The method may further include the step of measuring the level of sorbent liquid in the cartridge.

To achieve the above objectives of the present invention, a system for collecting and determining aerosol particles. A system for collecting and determining the concentration of aerosol particles by trapping aerosol particles with a sorbent liquid comprises a cyclone in which a sampling nozzle for injecting the sorbing liquid and air is mounted tangentially on the inner wall, the cyclone being connected to an air pumping means (vacuum pump); a reservoir (cartridge) for containing sorbing liquid; a collector mounted on the upper part of the cyclone to collect a sorbing liquid poured through a slice of the film, which rises in a spiral manner along the inner wall of the cyclone, while the accumulated sorbing liquid flows back into the cartridge; auxiliary tank, which is connected to the cartridge and replenishes the loss of sorbing liquid in the cartridge; a drain tank that is connected to the cartridge and receives contaminated sorbent liquid from the cartridge; a detector that is connected to the cartridge and measures the level of contamination of the sorbing liquid by sampling the sorbing liquid contained in the cartridge.

The system for collecting and determining the concentration of aerosol particles further comprises a level sensor that is connected to the cartridge and detects the level of sorbing liquid inside the cartridge. The level sensor may be a membrane pressure sensor.

A three-piece supply pipe can be mounted on top of the cartridge. The first inlet connection of the supply pipe is connected to the return pipe, the second inlet connection of the supply pipe is connected by means of the supply pipe to the auxiliary tank, and the third inlet connection of the supply pipe is connected by the first control pipe to the upper inlet connection of the level sensor.

A three-piece drain pipe is installed on the bottom of the indicated cartridge. The first outlet nozzle of the drain pipe is connected by the second control tube to the lower inlet fitting of the level sensor, the second outlet nozzle of the drain pipe is connected by a sampling tube to the detector, and the third outlet nozzle of the drain pipe is connected by the drain pipe to the drain tank.

The system for collecting and determining aerosol particles further comprises a microcontroller that controls the operation of the vacuum pump, peristaltic filling pump, peristaltic drain pump and peristaltic sampling pump in response to electrical signals from the detector and level sensor.

The microcontroller comprises an analog-to-digital converter connected to a level sensor, a processor connected to a detector, keys connected to a peristaltic filling pump, a peristaltic drain pump, and a peristaltic sampling pump, respectively; relay connected to the vacuum pump, control keyboard and display.

A method for collecting and determining aerosol particles comprises the steps of supplying a clean sorbing liquid to a cartridge; collecting aerosol particles from the air using a sorbing liquid using a cyclone; sampling the sorbing fluid contained within the cartridge, measuring the level of contamination; draining the sorbent liquid contained in the cartridge when the level of contamination exceeds a predetermined value; and replenishing the cartridge with a new portion of clean sorbing liquid and flushing the interior of the cyclone with a clean sorbing liquid.

The step of collecting aerosol particles comprises the steps of mixing the sprayed sorbing liquid and air in the internal channel of the intake pipe and supplying this mixture to the inner space of the cyclone; collecting aerosol particles on the surface of the sorbent liquid film and collecting the sorbing liquid containing aerosol particles; and re-directing the collected sorbent liquid for re-mixing with air.

Brief Description of the Drawings

Figure 1 is a General front view of a device for collecting aerosol particles according to a variant embodiment of the invention.

Figure 2 is a sectional view of the device shown in Figure 1, in section, taken along the line I-I. The arrows show the movement of the sorbing fluid flow in the device.

Figure 3 is a General side view of a device for collecting aerosol particles according to a variant implementation of the present invention.

Figure 4 is a sectional view of the device shown in Figure 3, in section, taken along the line II-II. Dotted arrows indicate the movement of air flow in the device.

5 is a general diagram of a system for collecting and determining the concentration of aerosol particles, in which a device for collecting aerosol particles is used.

6 is a block diagram explaining the operation of the system for collecting and determining the concentration of aerosol particles.

Detailed Description of Illustrative Embodiments

Next, an illustrative embodiment of a device for collecting aerosol particles will be described with reference to the accompanying drawings.

Figure 1 shows a General front view of the device for collecting aerosol particles according to a variant implementation of the present invention, Figure 2 shows a sectional view of the device shown in Figure 1, in section, made along the line II, Figure 3 shows a General view on the side of this device, and Figure 4 shows a sectional view of the device shown in Figure 3, in section, made along the line II-II.

As shown in FIG. 1, a device 100 for collecting aerosol particles includes a cyclone 10 into which external air enters through an intake pipe 16; a reservoir (cartridge) 20 mounted on the outside of the cyclone 10 for supplying the sorbing liquid to the cyclone 10, and a collector 30 mounted on the top of the cyclone 10 to allow recirculation of the sorbing liquid inside the device 100.

The return pipe 40 is connected to the cartridge 20 through the intake pipe 26 for supplying sorbing fluid from the collector 30 to the cartridge 20.

As shown in FIGS. 2 and 4, the cyclone 10 includes a vortex chamber 12 having a cylindrical shape inside, and a deposition chamber 14 mounted on the upper part of the vortex chamber 12 and made in the form of a truncated cone. A negative pressure drop is created in the inner volume of the cyclone 10 by a vacuum pump, which forms a spiral vortex air flow inside the cyclone and a spiral strip of liquid film directly on the inner wall of the cyclone 10. The pressure drop is set so that the strip of liquid film can reach the upper cut of the deposition chamber 14 and overflow, entering collection 30.

The intake pipe 16 is located in the vortex chamber 12 in such a way that its output section forms a tangent (tangential) connection with the circumference of the cross section of the vortex chamber 12; while the output slice has a flat vertical shape with the holes of the output nozzles of two independent channels 162 and 164 (Figure 4). On the inlet side of the intake pipe 16, both channels 162 and 164 are combined into a common conical inlet nozzle 163, through which external air is sucked into the device 100. Both channels 162 and 164 are identical in the form of cylindrical tubes with a stepwise increase in the diameter of the channel near their entrance to the inner region vortex chamber 12. At the point of stepwise change in diameter are the nozzle holes; an upper air ejector 161 and a lower liquid ejector 165 connected by ejector tubes 22 and 24, respectively, to the inner region of the cartridge 20 (FIG. 2).

The cartridge 20 is detachably mounted on the outside of the vortex chamber 12 of the cyclone 10 and is filled with sorption liquid to collect aerosol particles present in the sampled external air. For example, the cartridge 20 may be snap mounted on the cyclone 10.

The cartridge 20 is connected to other nodes of the device 100 by means of a three-piece supply pipe 26 and a drain pipe 28 (Figure 2).

The first fitting of the supply pipe 26 is connected to the return pipe 40, the second fitting to the supply pipe 50, which through the electric valve V1 connects the cartridge 20 to an external reservoir for fresh sorbing liquid (not shown in Figs. 1-4). This reservoir serves to periodically replenish the sorbing liquid in the cartridge 20, lost as a result of evaporation and sampling for the detector.

The suction ejector tube 24 for supplying the sorbent liquid to the cyclone 10 passes through the side wall of the cartridge 20. The sorbing liquid sucked through the ejector suction tube 24 passes into the ejector nozzle 165 for the liquid of the suction pipe 16, is sprayed under the influence of a negative pressure drop arising in the area of the stepped changes in the diameter of the channel 164 during suction of the inlet air stream. The suction ejector tube 24 extends bent downward into the space of the tank so as to transmit the sorbing liquid even when the level of the sorbing liquid is lowered.

A sampling tube 60 is installed on the first fitting of the outlet outlet pipe 28 for supplying aliquots of the sorbing liquid to the detector (not shown in FIGS. 1-4). The detector determines the concentration of aerosol particles in the sorbing liquid. Valve V2 for regulating the volume of aliquots of the sorbing liquid supplied to the detector can be mounted on a sampling tube 60.

A drain pipe 80 is mounted on the second fitting of the outlet drain pipe 28 so as to discharge the contaminated sorbent liquid from the cartridge 20 into a waste container (not shown in FIGS. 1-4). Valve V3 for regulating the volume of waste sorbent liquid can be installed on the drain pipe 80.

In addition, the sensor SP measuring the level of sorbing liquid in the cartridge can be installed using the tube 70 and the third fitting of the drain pipe 28 in the cartridge 20. A pressure sensor can be used for this.

The collector 30 includes a collection tank 32 mounted on the cyclone 10 sedimentation chamber 14, a separator 34 located so as to be spaced slightly apart from the upper cut of the cyclone 10 deposition chamber 14, and a cover 36 for sealing the internal volume of the collection tank 32. The upper part of the separator 32 has the form of a cylindrical exhaust pipe passing through the cover 36 of the cyclone 10 and designed to connect the device 100 with an external vacuum pump (not shown in Fig.1-4).

Around the perimeter of the cylindrical outlet pipe under the cover 36 of the cyclone 10 are openings 38 for passing the air flow entering the interior of the collector 30 through the gap of the separator 34 (Figure 4).

The collection tank 32 is designed to collect a film of sorbing liquid flowing over the surface of the wall of the deposition chamber 14 and overflowing through its upper section. The bottom surface of the collection tank 32 has a perimeter inclined groove for collecting the sorbing liquid at the point of connection with the return pipe 40 to prevent the accumulation of sorbing liquid in the tank 32.

The separator 34 prevents the sorbing liquid from spraying upward on a section of the deposition chamber 14. The separator 34 may be formed so that it surrounds the inner and outer walls of the deposition chamber 14 in its upper part in an annular manner.

The return pipe 40 is connected to the bottom of the collection tank 32 and through the supply pipe 26 with the upper wall of the cartridge 20.

Next, operation of the aerosol particle collecting apparatus according to an embodiment of the present invention will be described with reference to FIGS. 2 and 4.

The vacuum pump connected to the exhaust pipe of the separator 34 is turned on and begins to pump air through the cyclone 10. The aerosol stream passes through the intake pipe 16 being divided into 2 flows by the internal channels 162 and 164 and enters the swirl chamber 12.

The nozzle 165 in the inner channel 164 of the intake pipe 16, located in the area of the stepwise change in the diameter of the inner channel, acts as an ejector element, since the step in the inner channel causes a significant decrease in air pressure above the nozzle, as a result of which the liquid is sucked from the cartridge 20 through the ejection tube 24. The energy of the air stream drawn into the channel 164 causes atomization of the suction stream of liquid in the ejector nozzle 165, thereby creating a liquid droplet aerosol stream. Consequently, in the area of the exit section of the channel 164 of the intake pipe 16, there is an interaction of two flows moving towards each other: intake air and liquid droplet aerosol, as a result of which aerosol particles are deposited from the inlet air stream on the surface of larger particles of the liquid droplet aerosol stream, which increases the capture efficiency of the device 100, since this process begins directly in the channel 164 of the intake pipe 16.

Since the intake pipe 16 enters the vortex chamber 12 tangentially, an aerohydro-sprayed vortex flow is formed in the chamber, the liquid component of which is deposited on the inner surface of the chamber and forms a continuous rotating film of sorbing liquid. The negative pressure in the device created by the external vacuum pump causes the liquid film to ascend along the inner wall of the deposition chamber 14 in the form of a wide spiral strip, as shown in FIG. With proper selection of the ratio of the volumetric flow rate of the inlet air stream, the geometric dimensions of the intake pipe 16, the vortex chamber 12, and the cyclone 10 deposition chamber 14, the spiral strip of liquid reaches the top of the deposition chamber 14 and gradually flows over the edge into the collector 30 and then enters the cartridge through the return pipe 40 20, thereby providing continuous recirculation of the sorbing liquid in the device 100.

Under the influence of the negative pressure difference inside the cyclone 10, the air vortex flow also rises in the form of a spiral flow, rotating around the axis of the cyclone, as shown in Fig. 4. Due to the significant difference in the density and viscosity of air and liquid, the speed of rotation and the number of revolutions of the two spiral flows - air flow and liquid flow - are significantly different from each other.

The main process of deposition of aerosol particles from the air stream is regulated by two mechanisms.

In the upper part of the vortex chamber 12 and in the lower part of the deposition chamber 14, the deposition is mainly provided by the collision (impact) of particles with the surface of the formed liquid film. Another deposition mechanism is determined by the tangential component of the vortex rotation speed in cyclone 10. Under the action of centrifugal forces, aerosol particles are thrown onto the walls of the cyclone, where they are captured by a rotating liquid film. The larger the tangential component of the rotation speed, the greater the centrifugal forces will be, and, as a result, the device will be able to capture aerosol particles of smaller diameter. To maintain a constant value of this component, the deposition chamber 14 is made in the form of a truncated cone along the axis of the vortex.

As mentioned above, the sorbent liquid collected at the bottom of the collection tank 32 flows down an inclined groove to the location of the return pipe 40, enters the collector 30 and then passes into the cartridge 20. If the sorbing liquid flows by gravity under the influence of gravity, the recirculating liquid accumulates at the bottom collection tank 32, thereby causing unpredictable fluid loss and inaccuracies in sample evaluation.

To eliminate this drawback, the second upper inner air channel 162 of the intake pipe 16 is connected to the ejector air tube 22 using the upper nozzle 161.

Due to the energy of the inlet air stream in the air channel 162 from the intake pipe 16 and the stage in the diameters of the channel 162, a negative pressure difference arises in the ejector tube 22 and in the upper air volume of the cartridge 20 at the junction of the supply pipe 26 and, thus, in the return pipe 40 creates a forced absorption of the recirculating fluid from the collection tank 32 into the cartridge 20, thereby preventing its accumulation.

The design of the outlet section of the intake pipe 16 through the use of two vertically arranged channels 162 and 164, one above the other, has a flat shape, close to rectangular, providing better aerosol capture, according to the theory of cyclones. Therefore, this design allows for a narrow and flat structure of the rotating air flow inside the cyclone 10. This flow structure, according to the theory of cyclones, provides better capture of aerosol particles from the air stream.

In addition, an air and liquid flow separator 34 is introduced into the device 100, which separates both flows near the upper cut of the precipitation chamber 14 of the cyclone 10, thereby preventing droplets of the recirculated liquid from falling off from the cut due to the energy of the air located upstream. The separator 34 encircles the upper section of the deposition chamber 14 with a certain gap, and the size of the gap is selected taking into account the smooth overflow of recirculated liquid through the upper section of the deposition chamber 14 without droplets.

A small portion of the outlet air stream passing through the gap of the separator 34 is returned to the total outlet air stream through the side openings 38 in the wall of the outlet pipe of the separator 32.

To take samples of the sorbing liquid for analysis of the composition and concentration of the selected aerosol, the sampling valve V2 installed in the sampling tube 60 is opened for a certain time. To ensure continuous operation of the device, in particular with the aim of replenishing the sorbing liquid in the cartridge 20, the valve V1 installed in the supply tube 50, and a predetermined volume of fresh sorbing liquid is supplied to the cartridge 20 from an external reservoir (not shown in the drawing). After completion of the operation of the device, the contaminated sorbing liquid from the cartridge 20 is discharged through a drain pipe 80 after valve V3 is turned on.

The level of the sorbing liquid in the cartridge 20 is controlled by a level sensor SP connected through a tube 70 and a drain pipe 28 to the bottom of the cartridge 20. This sensor converts the amount of liquid column in the cartridge into a proportional electrical signal. Assessment of the degree of liquid contamination in the cartridge can be carried out directly by the detector during the analysis of aliquots of the sorbing liquid.

Figure 5 shows a generalized diagram of a system for collecting and determining aerosol particles using the device for collecting aerosol particles described above.

As shown in FIG. 5, a system 200 for collecting and determining aerosol particles according to an embodiment of the present invention includes an aerosol particle collecting device 100, an auxiliary tank 110, a drain tank 120, a microbiological detector 130, a level sensor SP 90, and a microcontroller 140.

A peristaltic filling pump 52, a peristaltic sampling pump 62, and a peristaltic drain pump 82 are mounted on the supply pipe 50, the sampling pipe 60, and the drain pipe 80, respectively. If the level of sorbing liquid in the cartridge 20 drops, the auxiliary tank 110 maintains this level by supplying a clean sorbing liquid to the cartridge 20. The auxiliary tank 110 is connected to the cartridge 20 through the supply pipe 50. A peristaltic filling pump 52 mounted on the supply pipe 50 delivers the sorbing liquid from auxiliary tank 110 to cartridge 20.

The drain tank 120 is connected to the cartridge 20 through a drain pipe 80, and it receives the contaminated sorbing liquid from the cartridge 20 when the contamination of the sorbing liquid reaches a certain level. A peristaltic drain pump 82 mounted on the drain pipe 80 delivers contaminated sorbent liquid from the cartridge 20 to the drain tank 120.

The microbiological detector 130 takes a sample of the contaminated sorbing liquid in the cartridge 20 and measures the level of contamination of the sorbing liquid with microbes, regardless of their species. The microbiological detector 130 is connected to the cartridge 20 through a sampling tube 60 and a peristaltic sampling pump 62 mounted on the sampling tube 60 to supply an aliquot of the contaminated sorbing liquid from the cartridge 20 to the microbiological detector 130.

In addition, the level sensor 90 detects the level of sorbent liquid in the cartridge 20. The first inlet fitting of the level sensor 90 is connected to the upper part of the cartridge 20 using the first control tube 91, and the second inlet connection is connected to the lower part of the cartridge 20 using the second control tube 70. The membrane pressure sensor can be used as a SP 90 level sensor.

The microcontroller 140 controls the operation of the peristaltic filling pump 52, the peristaltic sampling pump 62, the peristaltic drain pump 82 and the vacuum pump 150, which is a means of pumping air through the device 100, in response to electrical signals from the level sensor 90 and the detector 130. The microcontroller 140 contains an analog- a digital converter 141, a processor 142, keys 143, a relay 144, a keyboard 145 for manually entering commands, and a display 146.

An analog-to-digital converter 141 is connected to the level sensor 90 and converts the electrical signals from the level sensor 90 into a digital code. The processor 142 issues instructions to the appropriate unit of the device according to the results of the pollution level measurements made by the microbiological detector 130. The keys 143 are connected to the peristaltic filling pump 52, the peristaltic drain pump 82 and the peristaltic sampling pump 62 and the peristaltic filling pump 52, the drain pump 82 and are turned off. a peristaltic sampling pump 62 in accordance with the instructions of the processor 142. The relay 144 is connected to the vacuum pump 150 and turns on / off the vacuum pump 150 in accordance with processor instruction 142.

6 is a flowchart illustrating the operation of a system for collecting and determining aerosol particle concentration.

As shown in FIGS. 5 and 6, when the “Start” command button on the keyboard is manually pressed, the microcontroller 140 drives the peristaltic filling pump 52 and fills the empty cartridge 20 with clean sorbing liquid. Upon reaching a predetermined liquid level in the cartridge, the peristaltic filling pump 52 is turned off (S1).

After the peristaltic filling pump 52 is stopped, a short waiting period is performed to stabilize the system. Then, the microcontroller 140 drives the vacuum pump 150 and drives the collection device 100. Aerosol particles from the air are captured by the sorbing liquid during operation of the device 100. The device 100 stops working after a predetermined time of one air sampling cycle (for example, 10 minutes) (S2).

After the device 100 has stopped operating, a short waiting period is performed to stabilize the system. Then, the microcontroller 140 drives a peristaltic sampling pump 62 to take an aliquot of the contaminated sorbent liquid contained in the cartridge 20 and directs it to the microbiological detector 130 (S3).

Meanwhile, the level sensor 90 detects the current level of the sorbing liquid in the cartridge 20 and sends the measurement result data to the processor 142. If the measurement result is lower than the set value, the processor 142 activates the peristaltic filling pump 52 using the key 143 and delivers the clean sorbing liquid from auxiliary tank 110 into cartridge 20 (S4).

The microbiological detector 130 measures the level of contamination of the sample of the sorbing liquid and sends the measurement result to the processor 142. The processor 142 determines whether the result of the measurement of the level of contamination of the selected sorbing liquid is a predetermined limit value or above it (S5).

If the level of contamination of the sorbing liquid is equal to or higher than the set value, the processor 142 drives the peristaltic drain pump 82 using a key 143 and supplies all the sorbing liquid from the cartridge 20 to the drain tank 120 (S6). If the level of contamination of the sorbing liquid is lower than a predetermined value, the processor 142 will repeat the air sampling cycle of the device 100 until the level of contamination of the taken sorbing liquid reaches a predetermined limit value.

When all of the sorbing liquid in the cartridge 20 is completely drained, the microcontroller 140 drives the peristaltic filling pump 52 and supplies a certain amount of clean sorbing liquid to the cartridge 20. The amount of sorbing liquid supplied at this time is intended to flush the device 100. When the sorbing liquid is filled in cartridge 20, microcontroller 140 drives a vacuum pump 150 (S7). After cleaning the device 100 for some time, the microcontroller 140 turns off the vacuum pump 150 and turns on the peristaltic drain pump 82 for draining the sorbing liquid for cleaning, and thus, the operation of the system 200 for collecting and determining the concentration of aerosol particles is completed.

The aerosol particle collection and determination system described above allows users to automatically collect and detect aerosol particles in the air in a convenient manner.

Although an illustrative embodiment of the present invention has been described for illustrative purposes, those skilled in the art will understand that various modifications, additions, and substitutions are possible without departing from the scope and spirit of the invention set forth in the appended claims.

Claims (36)

1. A device for collecting aerosol particles, containing a cyclone into which external air and a sorbing liquid are introduced through the intake pipe to select aerosol particles contained in the external air by a sorbing liquid; a reservoir containing a sorbing liquid that is sprayed into the cyclone; a collector collecting a film of sorbing fluid flowing along the inner wall of the cyclone; and a return tube conducting the sorbing liquid collected in the collector into the tank, while the intake pipe contains two identical cylindrical channels located vertically one below the other and having a common conical nozzle from the inlet side.
2. The device according to claim 1, in which the cyclone consists of a vortex chamber and a deposition chamber.
3. The device according to claim 2, in which the vortex chamber inside has the shape of a cylinder.
4. The device according to claim 2, in which the deposition chamber has the shape of a truncated cone, the lower part of which is coaxially connected to the upper cut of the vortex chamber.
5. The device according to claim 3, in which the intake pipe is tangentially connected to the inner diameter of the vortex chamber.
6. The device according to claim 1, in which each channel has a cylindrical shape with a stepwise increase in diameter near the output slice.
7. The device according to claim 6, in which in each channel in the place of a stepwise change in diameter from the side of the larger diameter there is an opening - an ejector nozzle; in the upper channel there is a nozzle of an air ejector and in the lower channel a nozzle of a liquid ejector.
8. The device according to claim 1, in which the reservoir is formed by a cartridge with the possibility of separation mounted on the outer wall of the cyclone.
9. The device according to claim 1, in which the collector contains a separator located so that it is spaced from the upper part of the cyclone deposition chamber for separating liquid and air flows moving inside the cyclone; and a collection tank collecting sorbing liquid separated by a separator.
10. The device according to claim 9, in which the separator is made in the form, annularly surrounding the inner and outer walls of the cyclone deposition chamber in its upper part.
11. The device according to claim 9, in which the return pipe is connected to the bottom surface of the collection tank, in the bottom surface of which there is an inclined spiral-shaped groove, the lower point of which is located at the point of attachment of the return pipe.
12. The device according to claim 8, in which a supply pipe with three inlet fittings is inserted into the cartridge cover.
13. The device according to item 12, in which the first fitting of the supply pipe through a return pipe is connected to the bottom surface of the collection tank.
14. The device according to item 12, in which the second fitting of the supply pipe is connected to a supply pipe for a clean sorbing liquid supplied to the cartridge.
15. The device according to 14, in which the valve regulating the flow of sorbing liquid from an external reservoir for clean sorbing liquid into the cartridge can be additionally mounted on the supply tube.
16. The device of claim 8, in which a drain pipe having three outlet fittings is introduced into the lower surface of the cartridge.
17. The device according to clause 16, in which a sampling tube, feeding an aliquot of the sorbent liquid to the detector, which determines the concentration of aerosol particles collected by the sorbing liquid, is connected to the first fitting of the drain pipe.
18. The device according to 17, in which the detector for measuring the level of the sorbing liquid is connected to a sampling tube.
19. The device according to p. 18, in which the valve regulating the flow of the sorbing liquid in the detector can be additionally mounted on the sampling tube.
20. The device according to clause 16, in which the drain pipe discharging the sorbing liquid is connected to the second fitting of the drain pipe.
21. The device according to claim 20, in which the valve that regulates the flow of the sorbing liquid into the waste container can be additionally installed on the drain pipe.
22. The device according to claim 1, in which the aerosol particles are microbes.
23. A method for collecting aerosol particles, comprising the steps of supplying external air and a sorbing liquid through an intake pipe into the inner space of the cyclone; mixing the external air and the sprayed sorbing liquid with each other by a cyclone and trapping the aerosol particles contained in the external air with a film of sorbing liquid formed on the inner wall of the cyclone; collecting a film of sorbing liquid in which aerosol particles are collected; and spraying and re-mixing the sorbent liquid with the air inlet in the intake pipe, the intake pipe comprising two identical cylindrical channels located vertically one below the other and having a common conical nozzle from the inlet side.
24. The method according to item 23, in which the step of supplying and spraying the sorbing liquid is carried out due to the pressure drop of the air flow created inside the channel of the intake pipe.
25. The method according to item 23, further comprising the step of selecting an aliquot of the sorbent liquid supplied to determine the concentration of aerosol particles collected by the sorbing liquid.
26. The method according to item 23, further comprising the step of measuring the level and degree of contamination of the sorbing liquid in the tank.
27. A system for collecting and determining the concentration of aerosol particles by trapping aerosol particles with a sorbent liquid, comprising a cyclone in which vortex mixing of the inlet air stream and a small drop stream of the sorbing liquid and deposition of aerosol particles from the air stream onto the surface of the liquid film formed on the inner surface of the cyclone, raising and overflow of the liquid film through the upper section of the cyclone, which is connected to the means for pumping air; a reservoir for containing a sorbent liquid sucked into the cyclone; a collector mounted on the upper part of the cyclone, which collects a film of sorbing liquid passing through the inner wall of the cyclone chamber, and directs the sorbing liquid back into the tank; an auxiliary tank, which is connected to the tank and replenishes the sorbing liquid, decreasing in the tank; a drain tank that is connected to the tank and receives the sorbing fluid contained in the tank; and a detector that is connected to the reservoir for containing the sorbing liquid and measures the level of contamination of the sorbing liquid by taking samples of the sorbing liquid contained in the reservoir for containing the sorbing liquid.
28. The system of claim 27, further comprising a level sensor that is coupled to the reservoir for containing the sorbent liquid and determines a level of the sorbent liquid in the reservoir.
29. The system of claim 28, wherein the level sensor is a membrane pressure sensor.
30. The system according to p, in which the third inlet fitting of the supply pipe is connected to the first control tube, which is connected to the upper fitting of the level sensor.
31. The system according to p. 28, in which the third outlet fitting of the drain pipe is connected to the second control tube connected to the lower fitting of the level sensor.
32. The system of claim 28, further comprising a microcontroller that controls the operation of the air pump, peristaltic filling pump, peristaltic drain pump, and peristaltic sampling pump in response to electrical signals from the detector and level sensor.
33. The system of claim 32, wherein the microcontroller comprises an analog-to-digital converter connected to a level sensor, a processor connected to a detector, keys connected to a peristaltic filling pump, a peristaltic drain pump and a peristaltic sampling pump, respectively, a relay connected to the means air pumping, input device and display.
34. A method for collecting and determining the concentration of aerosol particles, comprising the steps of supplying a sorbing liquid to a reservoir; collecting aerosol particles from the air using a sorbing liquid using a cyclone; sampling the sorbing fluid contained within the tank to measure the level of contamination; draining the sorbent liquid contained in the tank when the level of contamination exceeds a predetermined value; and replenishing a new sorbing liquid into the tank and cleaning the interior using a new sorbing liquid, while the external air passes through the intake pipe into the cyclone, and the intake pipe contains two identical cylindrical channels located vertically one below the other and having a common conical nozzle from the inlet side .
35. The method according to clause 34, in which the step of collecting aerosol particles includes the steps of mixing the sorbing liquid and air using the intake pipe and feeding the mixture into the inner space of the cyclone; trapping aerosol particles with a sorbing liquid and collecting a sorbing liquid that contains aerosol particles; and re-directing the collected sorbent liquid to the intake pipe for re-mixing with air.
36. The method according to clause 34, further comprising the step of measuring the level of sorbent liquid in the tank and supplying additional sorbent liquid to the tank when the level is reduced.
RU2008125809/15A 2008-06-24 2008-06-24 Device and method for collection of aerosol particles and their concentration definition RU2397801C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2008125809/15A RU2397801C2 (en) 2008-06-24 2008-06-24 Device and method for collection of aerosol particles and their concentration definition

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
RU2008125809/15A RU2397801C2 (en) 2008-06-24 2008-06-24 Device and method for collection of aerosol particles and their concentration definition
KR20080069902A KR101510254B1 (en) 2008-06-24 2008-07-18 System and method for collecting and detecting airborne particles
US12/327,210 US7964018B2 (en) 2007-12-03 2008-12-03 Apparatus and method for collecting and detecting airborne particles

Publications (2)

Publication Number Publication Date
RU2008125809A RU2008125809A (en) 2009-12-27
RU2397801C2 true RU2397801C2 (en) 2010-08-27

Family

ID=41642640

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2008125809/15A RU2397801C2 (en) 2008-06-24 2008-06-24 Device and method for collection of aerosol particles and their concentration definition

Country Status (2)

Country Link
KR (1) KR101510254B1 (en)
RU (1) RU2397801C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2491349C2 (en) * 2011-10-14 2013-08-27 Федеральное бюджетное учреждение науки "Московский научно-исследовательский институт эпидемиологии и микробиологии имени Г.Н. Габричевского" Федеральной службы по надзору в сфере защиты прав потребителей и благополучия человека (ФБУН МНИИЭМ им. Г.Н. Габричевского Роспотребнадзора) Method of express forecast of total bacterial content of air environment

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011247609A (en) 2010-05-24 2011-12-08 Nissan Motor Co Ltd Aerial particle detecting device
RU2453356C1 (en) * 2011-05-31 2012-06-20 Эдуард Владимирович Юрьев Air cleaning unit
KR101635321B1 (en) * 2015-08-28 2016-07-01 이해동 Mobile atmosphere solution equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2709677B1 (en) 1993-09-10 1995-12-15 Sgn Soc Gen Tech Nouvelle Purification process of a gas by washing - Venturi column for its implementation.
GB9911336D0 (en) * 1999-05-15 1999-07-14 Graseby Dynamics Ltd Separation and collection of analyte materials
JP3525154B2 (en) 2001-11-28 2004-05-10 独立行政法人 科学技術振興機構 Continuous concentration equipment and concentration measurement equipment for atmospheric trace components
KR20030064456A (en) * 2002-01-28 2003-08-02 김용곤 Air Cleaning Device and Method for Cleaning Contaminated Air

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2491349C2 (en) * 2011-10-14 2013-08-27 Федеральное бюджетное учреждение науки "Московский научно-исследовательский институт эпидемиологии и микробиологии имени Г.Н. Габричевского" Федеральной службы по надзору в сфере защиты прав потребителей и благополучия человека (ФБУН МНИИЭМ им. Г.Н. Габричевского Роспотребнадзора) Method of express forecast of total bacterial content of air environment

Also Published As

Publication number Publication date
KR20100002010A (en) 2010-01-06
RU2008125809A (en) 2009-12-27
KR101510254B1 (en) 2015-04-08

Similar Documents

Publication Publication Date Title
NL1022500C2 (en) Device for collecting dust of the cyclone type for vacuum cleaner.
ES2228893T3 (en) Improved air / particle separator.
US20150028126A1 (en) Fragrance Nebulizer with Drainage System
US5908493A (en) Filtering system for cleaning air
CN103934122B (en) Vortex waste separator apparatus
US7749310B2 (en) Device and method for cleaning a centrifugal separator
AU2007243057B2 (en) Passive grease trap using separator technology
US7261008B2 (en) Air sampler
KR100251826B1 (en) Process and device for purifying sewage
RU2340388C2 (en) Device for collection and separation of ambient air particles and microorganisms
DE60117306T2 (en) Improved dust / particle collection device for cyclone separators
TW508260B (en) Liquid filtration device
CN101730495B (en) Cyclonic utility vacuum
US7998251B2 (en) Vortex waste separator apparatus
KR100841358B1 (en) Flowing-down rainwater filtration device and rainwater storage device using the same
EP1545317B1 (en) Liquid sampler and method
KR101227893B1 (en) Wet type dust collector
JP4274957B2 (en) Wet and dry vacuum cleaner
ES2253120A1 (en) Cyclone dust collecting apparatus and vacuum cleaner using the same
KR100745810B1 (en) Dust collector
JP2010505611A (en) Vacuum line cleaning separation system
FR2870140A1 (en) Multi-speaker dust collection device for a vacuum cleaner
CA2464907A1 (en) Method and apparatus for separating immiscible phases with different densities
US5367716A (en) Automatic flush toilet detergent and perfume dispenser
CN205287953U (en) Multistage spiral -flow type water -bath deduster