Wet air purifier with successive filtration

Abstract

The invention relates to equipment for the wet treatment of gases using periodic discreet processes rather than continuous processes, and can therefore be used primarily in domestic appliances, such as air purifiers and humidifiers, but also in industrial ventilation and air conditioning. The present invention addresses the problem of providing more efficient air purification. A wet air purifier with successive filtration comprises a housing, a reservoir containing a liquid, an inlet pipe for a contaminated air stream, and an outlet pipe for clean air, the reservoir being comprised of N filter units, wherein a filter unit is in the shape of a parallelogram and consists of an inlet chamber and an outlet chamber separated by a barrier that is mounted with clearance from the bottom of the reservoir, the bottom edges of said barrier have slots, the inlet chamber has a filtering mesh mounted horizontally therein, and the inlet and outlet chambers have identically sized rectangular ports, wherein the filter units are arranged in succession, one after another, such that the port of an outlet chamber constitutes the port of the inlet chamber of the next unit, and the air to be purified flows successively from one liquid-containing unit to the next.

Description

[0001] Wet air purifier with sequential filtration.

[0002] Field of technology.

[0003] The invention relates to the technology of liquid processing of gases using not continuous, but periodic discrete processes, and therefore can be used mainly for household devices, such as air purifiers and humidifiers, as well as for ventilation and air conditioning systems of industrial facilities.

[0004] State of the art.

[0005] A device for air purification is known, containing a dust collector in a housing and an electronic membrane drive [1]

[0006] A vacuum cleaner is known, comprising a housing, a motor with main and additional fans and a filter, which is made in the form of a chamber with openings adjoining the wall of a partition [2]. The disadvantages of known devices are that they cannot ensure the quality of air purification from foreign impurities and are complex in design; the electromagnetic membrane drive creates noise, operates in cycles, is complex in design and the coordinated operation of its mechanisms is questionable.

[0007] A device for purifying air is known, comprising a housing with pipes and a transport pipeline for the input of dusty air, a bath for liquid in the housing serving as a dust collector, a draft inducer and a filter mounted on the housing [3]. However, this device does not eliminate the aforementioned shortcomings. In [4], a system for treating indoor air is disclosed, which uses a preliminary dust-collecting filter (a sheet of cellular foam), a first carbon filter, a second double honeycomb carbon filter (having a design similar to the first carbon filter) and an air blower. A HEPA filter for fine particles, as well as a fine filter, are located downstream from the air blower.

[0008] [5] discloses a humidifier and air purifier. It has a filter structure comprising a pre-filter, a medium filter, an activated carbon filter, a deodorizing filter, a HEPA filter, and a humidifying filter. The medium filter uses an antibacterial material and removes medium-sized dust, pet hair, etc. The deodorizing filter, for example, removes cigarette smoke or volatile organic compounds.

[0009] The disadvantages of known devices include their inability to purify the air of impurities. Another drawback is the complexity of the design.

[0010] A method for wet gas cleaning is known, which includes feeding a gas stream into a cylindrical body of a gas cleaner, the interaction of the gas stream with a counter-current liquid while passing through an annular gap in a wide range of speeds. The method is implemented in a device for wet gas cleaning, comprising a cylindrical body, gas inlet and outlet pipes located coaxially with the body above the gas supply pipe to form an annular gap with respect to the wall of the body, a dispenser of a rinsing liquid with a pipe for feeding the rinsing liquid located above it, an annular vane swirler. [6]. A disadvantage of the method and the device is insufficient productivity, which is confirmed by the low value of the gas velocity at the outlet of the working space (foam layer), i.e. in the full cross-section of the device, which is 2.0-2.5 m / s, instability of the foam layer and a low degree of gas cleaning.

[0011] The known method involves feeding a contaminated air stream through an inlet pipe into a liquid-containing tank, a cylindrical casing at least partially immersed in the liquid and designed to create an annular gap between the opposing side walls, forming a siphon. At least one separating baffle for coarse particles is located at the base of the cylindrical casing and immersed in water. A first funnel-shaped deflector is suspended within the cylindrical casing above the water level, and a second deflector, shaped like a funnel and inverted relative to the first deflector, is positioned above it. The second deflector is connected to the outlet pipe.

[0012] Through the inlet pipe, the contaminated air flow passes through a water siphon, where bubbling occurs, moves upward, where suspended water droplets are separated from the air by funnel-shaped reflectors and is directed to the outlet pipe [7].

[0013] A disadvantage of the known method and the device used to implement it is that when contaminated air is bubbling through the liquid, bubbles form. Some dust settles on the bubble wall, while the majority remains within the bubble. When the bubble rises to the surface of the liquid, it bursts, and the dust trapped within is ejected into the cylindrical housing, where it is placed next to funnel-shaped reflectors for additional purification. It is impossible to separate the reflected air flow from the funnel-shaped reflectors from the constantly rising air flow from the water siphon. They mix and are directed into the outlet pipe, resulting in insufficient air purification. Furthermore, the air purification process and the device used to implement this method are complex due to the design complexity.

[0014] A method for wet cleaning of air from dust is known, which includes feeding a contaminated air flow to the surface of a cleaning liquid, capturing and mixing under the influence of aerodynamic forces the contaminated air flow and the calculated volume of cleaning liquid, and then separating the captured cleaning liquid from the cleaned air flow [8].

[0015] The disadvantage of this method is the large dimensions and complexity of the design of the device implementing the method.

[0016] The closest technical solution to the claimed object is a method of air purification with internal circulation of liquid, which consists in the fact that the contaminated gas flow is fed through an inlet pipe located in the housing, and one of the ends of the pipe is positioned with a gap above the surface of the liquid located in the tank, and an impact of the gas flow on the surface of the liquid is created, forming a gas-liquid suspension, and then the gas-liquid suspension is removed to a liquid phase separator, the gas flow is freed from liquid droplets and removed through the outlet pipe [9].

[0017] A method and device for cleaning air are known, comprising a housing, a branch pipe for introducing dusty air and a branch pipe for exiting purified air, a reservoir with liquid, inside the reservoir with liquid with a gap from the bottom of the reservoir with liquid a hollow module with slots in its lower part is installed, inside the hollow module a frame is fixed, consisting of two fine-mesh nets, the space between which is filled with a nozzle or without it, above the frame of fine-mesh nets with a nozzle a frame with a large-mesh net is fixed, and the outlet branch pipe is equipped with a splash-proof net

[0010] .

[0018] The disadvantages of the known device are that it does not provide high-quality air purification from impurities.

[0019] The essence of the invention.

[0020] The objective of the present invention is to improve the efficiency of air purification.

[0021] The stated problem is solved due to the fact that in a wet air purifier with sequential filtration, comprising a housing, a reservoir with liquid, a branch pipe for supplying contaminated air flow, a branch pipe for discharging purified air, at the bottom of the reservoir with liquid a partition with a gap from the bottom of the reservoir is installed, the lower edges of which have slots, according to the invention, the reservoir is made in the form of N filter blocks, the filter block is made in the form of a parallelogram consisting of an inlet and outlet chambers, separated by a partition with a gap from the bottom of the reservoir, the lower edges of which have slots, a filter mesh is installed horizontally in the outlet chamber, the windows of the inlet and outlet chambers are rectangular in shape and have the same dimensions, the filter blocks are installed sequentially one after another so that the window of the outlet chamber is the window of the inlet chamber of the next block, and the air being purified sequentially flows from one block with liquid to another.The distinguishing features of the claimed device include a reservoir consisting of N filter blocks. The filter block is a parallelogram consisting of an inlet and outlet chamber separated by a partition with a gap from the reservoir bottom, the lower edges of which are slit. A filter mesh is installed horizontally in the outlet chamber. The rectangular windows of the inlet and outlet chambers are identical in size. The filter blocks are installed sequentially one after another so that the outlet chamber window is the inlet chamber window of the next block. The purified air flows sequentially from one liquid-containing block to the next. Air enters the liquid-containing reservoir, where a liquid layer forms between the upper liquid level and the slits, through which gas bubbles bubble, escaping from the slits.Gas bubbles escaping through the partition's slits coalesce into streams that pass through the liquid layer, causing the liquid to pseudo-boil, forming a gas-liquid suspension. And so on sequentially through all N filter blocks of the liquid reservoir.

[0022] The gas-liquid suspension is then directed through a fine-mesh frame secured within the outlet chamber of each filter unit and liquid reservoir, thereby ensuring high levels of purification of the contaminated air flow. The resulting layer of moving foam has a highly developed surface area for absorbing the smallest particles and purifying the air flow.

[0023] Brief description of the drawings.

[0024] Fig. 1, 2, 3 show a schematic representation of the claimed device. Fig. 1 shows a schematic representation of the device before switching on. Fig. 2 shows a schematic representation of the device after switching on. Fig. 3 shows a 3D model of the final filter unit, where:

[0025] 1 - liquid tank,

[0026] 2 - filter block,

[0027] 3 - inlet chamber, b 4 - outlet chamber,

[0028] 5 - partition with slots,

[0029] 6 - inlet pipe,

[0030] 7 - outlet pipe,

[0031] 8 - splash guard,

[0032] 9 - fine mesh frame

[0033] 10 - foam layer,

[0034] 11 - lid.

[0035] A wet air purifier with sequential filtration comprises a tank with liquid 1, made of filter blocks 2, at the bottom of which a partition with slots 5 is placed in all N filter blocks 2 of the tank with liquid 1. In the body of the tank with liquid 1 in the first filter block 2, in the inlet chamber 3, an inlet pipe 6 is mounted and an outlet pipe 7 in the N filter block 2 of the outlet chamber 4. In the tank with liquid 1, above the liquid layer, frames 9 with a fine-mesh net are placed in each of the N filter blocks 2. In the N filter block 2, in the outlet chamber 4 of the tank with liquid 1, a splash guard 8 is installed at the outlet in front of the outlet pipe 7. A cover 11 is put on top of the tank with liquid 1. In addition, for example, an air suction unit (not shown) is installed on the outlet pipe 7 for stable operation of the device. It is also possible to operate the device without splash guard 8.

[0036] The device works as follows.

[0037] When a contaminated air flow is supplied through the inlet pipe 6, the air enters the filtering unit 2 of the inlet chamber 3 into the space of the partition with slots 5 in the first filtering unit 2 of the tank with liquid 1. A portion of the liquid in the outlet chamber 4 is squeezed out and is located above the frame with a fine-mesh net 9. Between the upper level of the liquid and the slots, a liquid layer is formed through which gas bubbles escaping from the slots bubble. The gas bubbles escaping through the slots of the partition 5 merge into streams that pass through the liquid layer and cause pseudo-boiling of the liquid, forming a gas-liquid suspension. After this, the flow of the gas-liquid suspension is directed through the frame 9 with a fine-mesh net, fixed in each of the N filtering units 2 of the inlet chamber 3 of the tank with liquid 1, thereby ensuring high purification of the contaminated air flow.The resulting layer of moving foam 10 has a highly developed surface area for absorbing the smallest particles and purifying the airflow. The airflow is then dried through splash guard 8. Thus, the purified air flows sequentially from one filter block 2 with liquid to another and is then discharged through outlet pipe 7. Water is replaced after removing cover 11 into reservoir 1.

[0038] Additionally, for industrial ventilation and air conditioning systems, a system for supplying and replenishing water to tanks and draining contaminated water can be integrated into the device. For this purpose, additional feeder pipes and a contaminated water drainage system can be installed in the tanks, allowing for periodic draining and refilling with clean water.

[0039] This ensures an increase in the efficiency of air purification due to multi-level preliminary purification of the contaminated air flow in a tank with liquid by feeding the contaminated air flow through N partitions with slots with the formation of a pseudo-boiling gas-liquid suspension in each chamber and subsequent additional purification when the air passes after the chambers through frames consisting of a fine-mesh net.

[0040] Sources of information:

[0041] 1. Author's certificate SU No. 1664276.

[0042] 2. Copyright certificate SU No. 1673037.

[0043] 3. US Patent No. 2102353.

[0044] 4. US Patent No. 4,737,173.

[0045] 5. Application KR No. 2011 0001624.

[0046] 6. A.s. No. 1212515,

[0047] 7. Patent of the Russian Federation No. 2140761,

[0048] 8. Russian Federation Patent No. 218696

[0049] 9. Russian Federation Patent No. 2803732 - prototype.

Claims

Invention formula. A wet air purifier with sequential filtration, comprising a housing, a reservoir with liquid, a pipe for supplying contaminated air flow, a pipe for discharging purified air, a partition with a gap from the bottom of the reservoir, the lower edges of which have slots, is installed at the bottom of the reservoir with liquid, characterized in that the reservoir is made in the form of N filter blocks, the filter block is made in the form of a parallelogram consisting of an inlet and outlet chambers, separated by a partition with a gap from the bottom of the reservoir, the lower edges of which have slots, a filter mesh is installed horizontally in the outlet chamber, the windows of the inlet and outlet chambers are rectangular in shape and have the same dimensions, the filter blocks are installed sequentially one after another so that the window of the outlet chamber is the window of the inlet chamber of the next block, and the air to be purified sequentially flows from one block with liquid to another.

Images