876results about "Electrode constructions" patented technology

A gas-liquid contactor for capturing carbon dioxide (CO2) from atmospheric air includes an inlet; an outlet; a gas-sorbent interface disposed between the inlet and the outlet; a liquid distribution system configured to flow a CO2 capture solution along the gas-sorbent interface; a fan configured to flow the atmospheric air along a flow path from: the inlet, along the gas-sorbent interface, and to the outlet, to contact the atmospheric air with the CO2 capture solution and absorb CO2 from the atmospheric air into the CO2 capture solution to form a CO2-lean gas stream; and an electrostatic drift eliminator within the flow path downstream of the gas-sorbent interface and upstream of the outlet. The CO2-lean gas stream includes aerosols of the CO2 capture solution. The electrostatic drift eliminator is configured to ionize at least some of the aerosols of the CO2 capture solution to form ionized aerosols and collect the ionized aerosols.

Provides a dust collector capable of being installed even in small spaces and capable of collecting dust efficiently. A dust collector 1 includes a first electrode layer 12 formed of a conductor, a second electrode layer 14 formed of a conductor, having sufficient size to cover the first electrode layer 12 in planar view, having lacking parts (through holes 14H, slits 14S) piercing therethrough in a thickness direction, having sufficient size to cover the first electrode layer 12 in planar view, and placed interfacing the first electrode layer 12, and an insulating layer (a first insulating layer 13, a second insulating layer 15) formed of an insulative material, insulating the first electrode layer 12 and the second electrode layer 14, and forming a single merged layer structure with the first electrode layer 12 and the second electrode layer 14.

The invention provides an electrode plate, a dust collection assembly and air purification equipment, the electrode plate is used for the dust collection assembly, the electrode plate is a flexible electrode plate, the electrode plate comprises a flexible insulating layer, and a plurality of limiting parts arranged at intervals are arranged on the flexible insulating layer; and the conductive layer is arranged on one side of the flexible insulating layer and is connected with the flexible insulating layer. According to the electrode plate provided by the invention, enough spacing is provided between the adjacent conductive layers, the spacing between the adjacent conductive layers is ensured to be fixed, contact between the adjacent conductive layers is avoided, the stability of an electric field generated by the electrode plate is further ensured, adsorption of media such as dust is realized, and the electrode plate does not need to be fixed by additionally arranging a clamping strip or applying a hot melt adhesive; the process difficulty and the processing cost of the dust collection assembly are greatly reduced, the appearance of the dust collection assembly is not affected, meanwhile, the spacing between the adjacent conductive layers is increased due to the arrangement of the limiting parts, the dust collection area of the dust collection assembly is further increased, and the dust removal, sterilization and disinfection effects are improved.

The invention relates to a dry tar-containing tail gas treatment process which comprises the following steps: step 1, after tail gas is collected by a pipeline, granulating tail gas enters a pipeline degreaser under the air draft action of a tail gas fan at the tail end; the invention relates to the technical field of tar-containing granulation tail gas treatment. According to the dry tar-containing tail gas treatment process, tar larger than or equal to 10 microns is intercepted through a detachable filter screen in a pipeline degreaser, and blockage is prevented in cooperation with a steam / solvent flushing opening; the dry type preprocessor adopts three-stage gradient filtration of a G3 metal net, G4 glass fibers and G5 glass fibers, viscous particles below 5 microns are thoroughly removed, and automatic overload alarm is realized through pressure difference detection; submicron oil mist is adsorbed by the electric trapping oil remover through a high-voltage electric field, safety is guaranteed through an explosion venting sheet, and electrodes are continuously / discontinuously flushed through a spraying pipe; the cleaning system separates a mixing / circulating area through a partition plate, an oil separation net protects a flushing water pump, and long-term stable operation of the device is achieved. The problem that tar is difficult to clean due to adhesion is thoroughly solved.

The utility model discloses a cathode hanging dust remover, relates to the technical field of cathode hanging dust removal, solves the problem that dust is easy to deposit on the inner surface of a porcelain bushing in the prior art, and adopts the technical scheme that the cathode hanging dust remover comprises a supporting flange, the porcelain bushing and a supporting plate covering the top of the porcelain bushing, a supporting flange is arranged on the supporting plate, a cathode rod partially extending below the supporting flange is connected to the supporting plate, the bottom of the porcelain bushing is in sealed connection with the supporting flange, the top of the porcelain bushing is in sealed connection with the supporting plate, at least one air inlet is formed in the supporting plate, a rotatable adjusting cover is arranged on the supporting plate, and the adjusting cover is arranged on the supporting plate. The air inlet is partially or completely shielded by rotating the adjusting cover, so that the communication area between the air inlet and the outside is changed. The utility model is mainly used for solving the problem that dust is easy to deposit on the inner surface of the porcelain bushing.

An air filter for an air filter assembly in an air conditioner is provided, in particular for filtering out particles, preferably pollutants, from air. The air filter contains a filter element with an electrically conductive layer. The air filter also has a housing that partially encompasses a housing interior into which the filter element is inserted. The air filter also has a terminal on the housing that can be contacted from outside the housing interior, which is made of an electrically conductive material and is connected to the conductive layer of the filter element.

The application relates to the technical field of electrostatic dust removal equipment, in particular to an electrostatic dust collecting device, an electrostatic dust removal system and an electrostatic dust collecting device design method. The electrostatic dust collecting device comprises a first metal plate, a second metal plate, a first support column, a second support column, a first positioning sleeve and a second positioning sleeve. The first metal plate and the second metal plate are parallel and arranged alternately along a first direction. The first support column and the second support column penetrate through the first metal plate and the second metal plate along the first direction. The first support column is electrically connected with the first metal plate, and the second support column is electrically connected with the second metal plate. The first positioning sleeve is arranged on the outer side of the first support column, and two adjacent first metal plates are supported through the first positioning sleeve. The second positioning sleeve is arranged on the outer side of the second support column, and two adjacent second metal plates are supported through the second positioning sleeve. According to the electrostatic dust collecting device, the machining precision of the support structure is improved, and the uniformity of the spacing between two adjacent conductive plates of the electrostatic dust collecting device is ensured.

The invention discloses a cathode wire, a cylindrical electric field and an installation method, and the cathode wire comprises a spring section, a linear section and a clamping section which are connected in sequence, and the spring section, the linear section and the clamping section are of an integrated structure. The linear section penetrates through the spring section, and the top of the linear section is fixedly connected with the top of the spring section; the spring section is used for being mounted on one side of the cathode frame; the clamping section is used for being installed on the other side of the cathode frame. According to the cathode wire, the cylindrical electric field and the installation method, the spring section, the linear section and the clamping section of the cathode wire are of an integrally-formed structure, installation accessories do not need to be additionally arranged, the installation process is greatly simplified, the clamping section and the spring section are both hidden in the cathode frame after installation is completed, only the linear section is exposed in the anode cylinder, and the installation efficiency is improved. The two ends, with complex structures, of the cathode wire can be prevented from making direct contact with lampblack, oil contamination adhesion is reduced, and the discharge effect of the cathode wire in long-term use and the purification effect of a cylindrical electric field are ensured.

The invention discloses a macro-energy laser light path environment purification method, which specifically comprises the following steps that three stages of purifiers are arranged in a closed environment of a photoelectric same cabin, and the three stages of purifiers comprise a first-stage high-speed airflow purging module, a second-stage electrostatic adsorption module and a third-stage high-efficiency filtering module; a laser scattering type impurity sensor is arranged in a closed environment of the photoelectric same cabin for real-time monitoring; the method comprises the following steps: firstly, carrying out primary purification, and carrying out replacement purging on a closed environment of the photoelectric same bin by adopting high-purity inert gas; then a third-stage purifier is started for deep purification, and when the real-time impurity concentration monitored by the impurity sensor is lower than a set threshold value, the third-stage purifier is closed. According to the technical scheme, the light path can be efficiently, stably and dynamically regulated and controlled to be purified, deep removal of impurities in the light path is achieved, and stable transmission of high-energy laser is guaranteed.

The invention relates to the technical field of building waste recovery, in particular to waste crushing treatment equipment for hydraulic engineering construction, which comprises a crushing cylinder and a dust removal cylinder, crushing teeth are arranged on the inner side surface of the crushing cylinder, a rotating mechanism is connected to one side of the crushing cylinder, a sieving mechanism is connected to the other side of the crushing cylinder, and a crushing mechanism is arranged in the sieving mechanism. A crushing hammer is arranged on the crushing mechanism, and the crushing hammer is arranged in the crushing cylinder and used for crushing construction waste; and the rotating mechanism comprises a rotating supporting column and a rotating positioning block, sealing plates which are symmetrically distributed are arranged on the rotating positioning block, the crushing cylinder is rotated through the rotating mechanism, and the construction waste is crushed. According to the construction waste crushing device, the crushing barrel rotates through the rotating mechanism, construction waste is crushed, small-particle construction waste is sieved through the sieve holes in the sieve plate, the construction waste is circularly crushed and sieved till being thoroughly crushed, dust is removed in the crushing process, energy consumption is low, new resource consumption is saved, and the construction waste crushing device is suitable for popularization and application. And the carbon emission is reduced.

The invention relates to the technical field of coated white board thickness detection, and discloses a thickness detection device on a coated white board production line, which comprises a rack, a thickness detection mechanism is arranged above the rack, a coated white board body is arranged on the thickness detection mechanism, and the coated white board body is arranged on the rack. And an electrostatic dust collection mechanism is arranged below the coated white board body. According to the thickness detection device on the coated white board production line, chippings can be generated when a coated white board body is subjected to thickness measurement through the thickness detection mechanism, the chippings can be conveniently adsorbed through an electrostatic dust collection mechanism, and the distance between white board clamping plates can be conveniently controlled by clamping supporting plates through cooperation of adjusting sliding holes and moving sliding blocks; the coated white board body can be conveniently and flexibly clamped by the white board clamping plate and can be conveniently changed according to the change of the winding and unwinding height of the coated white board body, the distance between the two sides of the coated white board body can be conveniently measured by the laser probe, the thickness of the coated white board body can be further obtained, and convenience and rapidness are achieved.

To provide an air cleaner which can automatically activate an electric precipitation part 10 at the appropriate time to efficiently perform internal clean operation with ozone without deteriorating use feeling of a user, and which can prevent ozone concentration from exceeding an allowable range.SOLUTION: An air cleaner includes an automated internal clean operation control mechanism which performs internal clean operation with ozone generated by automatically activating an electric precipitation part 10 in an energization control part that activates the electric precipitation part 10 according to a detection status of a dust sensor with conditions of the internal clean operation for activation that a vehicle is in operation, cumulative operation time is a prescribed time or more, and a prescribed time or more passes after operating an operation start switch or an operation mode changeover switch.SELECTED DRAWING: Figure 2

The invention relates to the field of electrostatic dust collection, and discloses an electrostatic adsorption type dust collection device for a painting workshop, the electrostatic adsorption type dust collection device comprises a box body, and an exhaust hopper and an air inlet hopper which are fixedly connected to two sides of the box body, the bottom of the box body is fixedly connected with an ash hopper, a dust collection plate is arranged in the box body, and the front end of the dust collection plate is movably connected with a corona electrode through a connecting frame; a plate cleaning assembly for cleaning dust on the surface of the dust collecting plate is arranged inside and outside the box body; the plate cleaning assembly comprises a push rod slidably connected to the interior of the box body, the dust collecting plate is fixedly connected to the exterior of the push rod, a sliding rod is fixedly connected to the interior of the box body, the dust collecting plate is movably connected to the exterior of the sliding rod, and a cleaning and scraping unit is arranged outside the sliding rod; dust attached to the surface of the dust collecting plate is cleaned through the cleaning rod, and the dust is separated from the dust collecting plate and falls into the dust hopper in cooperation with swinging of the dust collecting plate.

This application relates to an electro-purification device and an air curtain machine. The electro-purification device includes a discharge assembly, comprising at least one discharge unit. Each discharge unit includes multiple linear corona discharge electrodes and a ring-shaped grounding electrode, all fixedly arranged. All corona discharge electrodes and the ring-shaped grounding electrode are arranged opposite each other along a first direction, and all corona discharge electrodes are arranged radially towards the side closest to the ring-shaped grounding electrode. An insulating back-corona element is also included, arranged along the first direction on the side of the ring-shaped grounding electrode facing away from the corona discharge electrodes. By arranging all corona discharge electrodes radially towards the side closest to the ring-shaped grounding electrode, not only can the area of ​​corona discharge be increased, but a cone-shaped electric field can also be formed, making the corona discharge area compact. Therefore, it can concentrate and rapidly treat pathogens such as smoke, odors, droplets, and aerosols in enclosed spaces. Furthermore, by using the insulating back-corona element to generate back-corona discharge, an even better purification effect can be achieved.

The invention belongs to the technical field of carbon dioxide trapping, and particularly relates to a fluidized bed device for direct air trapping of carbon dioxide and a using method thereof.The fluidized bed device comprises a flowing rail car, hollow supporting pipes are fixed to the four end corners of the top of the flowing rail car, and a shell is fixed to the tops of the multiple hollow supporting pipes; a discharging cavity and a material collecting cavity are formed in the shell, a plurality of trays are assembled at the upper end of the flowing rail car and are sequentially arranged in the direction of the positive vertical plane, adsorption media are placed in the trays, a plurality of supporting rods are fixed among the trays and are distributed in a linear shape, and the supporting rods are arranged in the shell. And a plurality of air holes are uniformly formed in the side wall of the tray. Unipolar charges are released to the dust collection coiled material through the discharging rod, so that the dust collection coiled material can adsorb dust close to the tray, and the situation that dust in air falls on the surface of an adsorption medium, and the carbon dioxide trapping efficiency of the adsorption medium is reduced is avoided.

An electrostatic air filter device (1) and a method for operating the electrostatic air filter device (1) are proposed. The electrostatic air filter device (1) is designed to filter air flowing through it and comprises an ionizer (2) for ionizing air particles (3) in an electrostatic field generated by applying an electrical voltage supplied by a controllable electrical power source (21) to the ionizer (2). The electrostatic air filter device (1) further comprises an electrical control circuit (20) for controlling the controllable electrical power source (21). The electrical control circuit is configured to detect at least one current power parameter of the ionizer (2) to determine its current state and to adjust the electrical power source at least partially based on the detected power parameter.

To efficiently collect fine particles included in a gas.SOLUTION: A dust collection system includes: a flow path route through which a gas flows; a droplet supply section for supplying droplets to the flow path route; an electrostatic agglomeration unit that is arranged in the flow path route downstream from the position at which droplets are supplied, forms an electric field in the flow path of the gas, electrostatically charges the droplets and fine particles included in the gas, and causes the fine particles and the droplets to collide (agglomerate); and a dust collection section that is arranged in the flow path route downstream from the electrostatic agglomeration unit and collects the droplets and fine particles.SELECTED DRAWING: Figure 1

The application discloses a dust collector with dust compression function and relates to the technical field of dust removal equipment. The dust collector comprises a collector main body, a wind collecting pipe fixedly connected and communicated with the outer wall of the collector main body, a connecting flange fixedly connected with the top of the wind collecting pipe, a connecting box fixedly connected with the bottom outer wall of the collector main body, a bottom box fixedly connected with the bottom outer wall of the connecting box and an ionization dust removal device arranged in the collector main body. The ionization dust removal device is arranged to collect the dust not completely collected in the collector main body. The wind mixed with the dust enters the collector main body through the wind collecting pipe, the small-particle dust is floated to the air deflector along the airflow and is limited in the ionization plate to be charged with the same electric charge, the dust is adsorbed through the opposite-charge adsorption plate, the dust falls after power-off after use, the dust is prevented from escaping outside the device body, and the collection effect is improved.

A blower device (1000) of an air conditioning system for a vehicle, comprising: a blower box (100) including a duct part (110) with an inside air inlet (111) and an outside air inlet (112), an air-blowing part (120) connected to an inlet of an air-conditioning box, and a connecting part (130) for connecting the duct part (110) to the air-blowing part (120), wherein the connecting part (130) has an insertion part (131) from which a specific area is hollowed out; an inside and outside air conversion door (200) arranged in the duct part (110) of the blower box (100) for opening and closing the inside air inlet (111) and the outside air inlet (112); a blower (300) arranged in the air-blowing part (120) of the blower box (100) is arranged to forcibly blow air;an electric dust collector (400) located at the connecting part (130) of the blower box (100);and a cover (500) for opening and closing the insertion part (131) of the blower box (100), wherein the blower device (1000) of the air conditioning system for the vehicle has an electric charger unit (420) attached to the blower box (100) separately from the electric dust collector (400), and the electric dust collector (400) has a filter unit (410) for collecting dust charged with electricity by the electric charger unit (420) and a high-voltage supply unit (430) for applying high voltage to the electric charger unit (420) and the filter unit (410).

The invention relates to the technical field of agricultural instruments, and discloses a pull-type straw high-density bundling machine which comprises a first rack, a second rack, a picking mechanism and a bundling mechanism, the picking mechanism and the bundling mechanism are arranged on the inner side of the first rack, the second rack is rotationally connected with the first rack, and a first air cylinder used for driving the second rack to rotate is installed on the first rack; lifting plates are arranged on the two sides of the first rack in a sliding mode. Through the arrangement of the first partition plate, the second partition plate, the first elastic sealing strip and the second elastic sealing strip, a semi-closed operation space is constructed, and smashed grass and tree chippings, dust and other impurities raised in the straw picking and compressing stage are effectively prevented from dispersing to the outside; meanwhile, by combining the matched design of the electrostatic generator and the electrostatic plate, stable electrostatic adsorption force is generated on the surface of the electrostatic plate, suspended impurities dispersed in the operation space are rapidly captured, flying dust diffusion is restrained from the source, and the technical problem that the flying dust pollutes the operation environment in the operation process of the pull-type straw bundling machine is successfully solved.

The utility model discloses an environment-friendly low-energy-consumption intelligent regulation and control type air filter, relates to the technical field of air filters, and aims at solving the problems that a shell structure used in an existing intelligent regulation and control type air filter is of a fixed structure, cannot be disassembled and assembled, cannot be recycled for secondary use in the later period and is low in practicability. According to the key points of the technical scheme, a fixing piece is included, a clamping groove is formed in the fixing piece, a through hole is formed in the face, located on the outer side of the clamping groove, of the interior of the fixing piece, a first threaded hole is formed in the other face, located on the outer side of the clamping groove, of the interior of the fixing piece, and a first bolt is inserted into the through hole; a mounting groove is reserved in the outer side of the fixing piece. And the effect of convenient installation and use is achieved.

The utility model discloses a mounting mechanism for a cathode suspender of a wet-type electrostatic dust collector, which relates to the technical field of wet-type electrostatic dust collectors and comprises a cathode H-shaped girder and a suspender, a central column is fixedly arranged at the bottom end of the suspender, a clamping block is fixedly arranged at the bottom end of the central column and clamped in the middle of the upper end of the cathode H-shaped girder, and a supporting plate is fixedly arranged on the outer side of the central column. Sliding blocks are symmetrically arranged in the two ends of the supporting plate, connecting rods are fixedly arranged on the side faces of the sliding blocks, inserting plates are fixedly arranged at the ends, away from the sliding blocks, of the connecting rods, first springs wrap the outer sides of the connecting rods, symmetrical rectangular boxes are fixedly arranged on the two sides of the upper end of the cathode H-shaped girder, L-shaped plates are fixedly arranged at the upper ends of the sliding blocks, and stand columns are fixedly arranged at the ends, away from the sliding blocks, of the L-shaped plates; arc-shaped grooves are symmetrically formed in the two sides in the circular ring, and the stand columns are in contact connection with the inner sides of the arc-shaped grooves; according to the utility model, the suspender and the cathode H-shaped girder can be quickly and mutually mounted, the operation is simple, the efficiency is high, and the stability is good.

An electrocatalytic filter apparatus is provided for use with one or more of a heating, ventilating, refrigerating or air conditioning unit and a power source, the electrocatalytic filter apparatus comprising: a frame including a first side and a second side, each side including at least one aperture; a water inlet which is retained by the frame; a water outlet which is retained by the frame; at least two functionalized filters which are retained by the water inlet and the water outlet, are in parallel relation and are spaced apart to define an interstitial space which is in fluid communication with the water inlet and the water outlet, the functionalized filters including fiberglass or carbon fibers, wherein the functionalized filters are functionalized with low iron oxide, iron-doped titanium dioxide nanoparticles; an anode wire mesh which is retained by the frame and is disposed between the first side of the frame and one functionalized filter; a hydrogen gas generator, which is a second wire mesh anode, is retained by the frame and is disposed beside the second side of the frame; and a cathode wire mesh which is retained by the frame and is disposed between the second wire mesh anode and the other functionalized filter and is in parallel relation with the second anode wire mesh to define a channel which is fluid communication with the water inlet and the water outlet.

The invention provides a pulverized coal concentration device based on a charge method and a control method of the pulverized coal concentration device, and belongs to the field of combustion of coal-fired boilers. The problems that a traditional inertia separation technology is low in separation efficiency and prone to abrasion in the low-load stable combustion process of the pulverized coal boiler are solved. Comprising a corona discharge device, a grounding device, a central discharge device, a concentrated pulverized coal pipeline and a light-phase pulverized coal pipeline, a guide plate is arranged at an inlet of the concentrated pulverized coal pipeline, one end of the light-phase pulverized coal pipeline is inserted into the concentrated pulverized coal pipeline, and the other end of the light-phase pulverized coal pipeline is located on the outer side of the concentrated pulverized coal pipeline; the corona discharge device is arranged on the outer side wall, corresponding to the insertion section of the light-phase pulverized coal pipeline, of the concentrated pulverized coal pipeline, the grounding device is of an annular structure and arranged on the outer side of the corona discharge device in a surrounding mode, and a wear-resistant lining is arranged on the inner wall of the concentrated pulverized coal pipeline. The device is mainly used for improving the pulverized coal concentration of the pulverized coal boiler during low-load operation.

A drift elimination system for evaporative heat rejection equipment. The drift elimination system includes a first and second set of electrodes positioned apart from one-another in the air flow downstream of the fill and spray system. The first set of electrodes, optionally in the form of needles or thin plates are energized with a positive or negative charge. The second set of electrodes, optionally in the form of wavy plates or a wire mesh are energized with the opposite charge. Water droplets passing over or through the first set of electrodes accept a charge from the first set of electrodes and are attracted to the second set of electrodes where they are collected, removing the charged droplets from the airflow, reducing water loss and abating plume formation.

The utility model relates to a dust remover of preventing secondary dust raising belongs to dust removal field, for solve the partial particle size and filter mesh eye similar, very easy to cause filter mesh eye block, once blocking, the negative pressure ability of negative pressure device will drop sharply, directly cause the dust absorption effect of dust remover to be greatly reduced, the cleaning device is difficult to touch all corners of filter screen, part blocked mesh eye cannot be effectively cleaned, undoubtedly increase manpower and material resources cost problem, a dust remover of preventing secondary dust raising, including shell, the air inlet pipe who is connected in the top of shell, the lower side of shell is provided with reciprocating mechanism, the top of reciprocating mechanism is provided with push mechanism, through setting reciprocating mechanism, discard filter screen, rely on the guiding effect of sealing plate to dust, orderly push dust to specific position, because of no filter screen structure, ensure that the dust remover can continue stable operation, need not frequent shutdown cleaning filter screen, greatly improve the operation efficiency and reliability of equipment.

The utility model relates to the technical field of waste gas purification, in particular to a wet-type electric dust remover which comprises a dust removal box main body, a plurality of electrode plates are installed in the dust removal box main body, a spraying assembly used for cleaning the electrode plates is arranged on the top of the inner wall of the dust removal box main body, and sweeping assemblies are further arranged on the electrode plates. And the cleaning assembly assists the spraying assembly in comprehensively cleaning the electrode plate. The device is provided with a self-cleaning system, after dust removal work is finished, water can be sprayed to the electrode plate through the water inlet pipe, dust attached to the electrode plate is washed off, meanwhile, the servo motor drives the cleaning plate to slide along the surface of the electrode plate, the electrode plate is further cleaned, and long-term stable operation of the dust remover is ensured; falling dust can be collected through the filtering assembly, water filtering holes are formed in the filtering plate, water drops falling together with the dust can be filtered out, effective separation of the dust and water is achieved, and the maintenance cost is reduced.

The invention provides an automatic control device for mine ventilation and dust falling, and belongs to the technical field of ventilation control, the automatic control device comprises a dust collection cover body, pulleys are mounted at the bottom of the dust collection cover body, the dust collection cover body can move along sliding rails, and a controller, an electrostatic dust collection device, a ventilation device and an air return assembly are mounted in the dust collection cover body; the ventilation device comprises a ventilation plate, a cooling fan is installed on the ventilation plate and used for ventilation and cooling, an air return assembly is used for keeping smooth ventilation, the purpose of mine ventilation and dust fall automation is achieved, and therefore the overall energy consumption of stope ventilation is reduced.

Disclosed is a system for treating air drawn from within a room or enclosed space for discharge back into a room or other enclosed space or elsewhere, wherein the air is passed through a plurality of treatment stages comprising: a UV treatment stage; an injection stage configured to introduce water, an oxidising agent, and / or a biocide into the airflow; an electrostatic precipitation stage further comprising particulate collection electrodes; and a second UV treatment stage. Ozone may be generated by UV light having the wavelength of 180-190nm prior to electrostatic precipitation, or the ozone may be supplied separately. Atomised water may be sprayed into the airflow, as well as the addition of aqueous oxidising agents. The electrostatic may contain two or more stages. The particulate collection electrodes may comprise nozzles which may dispense water or other oxidising agents from the electrodes, and the electrodes may be cooled for condensation. The ozone in the system may be decomposed by using UV light having a wavelength of 250-290nm or using photocatalysts. One or more sensors may be provided to control different stages of the air purification system.