WO2015048969A1 - An air cleaning system - Google Patents

An air cleaning system Download PDF

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Publication number
WO2015048969A1
WO2015048969A1 PCT/DK2014/000048 DK2014000048W WO2015048969A1 WO 2015048969 A1 WO2015048969 A1 WO 2015048969A1 DK 2014000048 W DK2014000048 W DK 2014000048W WO 2015048969 A1 WO2015048969 A1 WO 2015048969A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
box
separator
droplet
lamellae
Prior art date
Application number
PCT/DK2014/000048
Other languages
French (fr)
Inventor
Simon Granath
Torben Bech SØRENSEN
Malin Ylvén ENGMAN
Merete Lyngbye
Frank Sørensen
Lasse KIEL-MADSEN
Original Assignee
Munters A/S
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 Munters A/S filed Critical Munters A/S
Publication of WO2015048969A1 publication Critical patent/WO2015048969A1/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20927—Liquid coolant without phase change
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/79—Injecting reactants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/304—Hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/406—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0266—Other waste gases from animal farms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Definitions

  • the prior art relates to an air cleaning system, in particular for the cleaning of exhaust air from pig and poultry houses, said system being incorporated in a box, container, and in which a device for emitting liquid droplets in mist form is mounted in the first part, the air supply part.
  • Such systems are primarily used for remedying ammonia and odourjiui- sances and for providing an effective animal house ventilation, which results in a considerably reduction in the air pollution around the animal houses, while ensuring a suitably clean atmosphere for the animals in the animal house.
  • a liquid mist admixed with base/acid is emitted in order to capture odour/ammonia
  • a droplet separator is arranged subsequently, consisting of lamellae/pipes arranged in parallel which extend across the entire cross-section of the box to capture and precipitate liquid when the liquid droplets with the air pass the droplet separator via the gaps between the lamellae in an essentially horizontal direction of flow.
  • a very effective air cleaning system for animal houses or other dusty industries is achieved in this surprisingly simple manner, which does not suffer from the drawback of rapid clogging to any appreciable extent, as the use of liquid mist followed by droplet separators does not clog to the same degree, and, therefore, no increasing consumption of energy for the ventilation system will occur in operation.
  • the lamellae or the pipes will be effective droplet separators, since the liquid will be captured and passed down along the lamellae to the bot- torn, where the liquid may be collected in order to be used as a fertilizer.
  • the liquid is valuable since it contains fertilizing substance as regards collection of nitrogen from the ammonia-containing air, which has been neutralized with acid in the spray water.
  • the lamellae or the pipes are provided with projecting impact areas in the form of waves or bulges, an effective droplet separator is achieved, since all the sucked liquid-containing air will touch a point on one of the lamellae. This takes place without any tendency that dust/feathers will settle firmly on the lamellae and thereby limit the flow.
  • the lamellae/pipes are incorporated in a frame, it is easy to handle the droplet separator, and it is also ensured that the lamellae remain stable in the frames.
  • the system When, as stated in claim 5, the system is provided with a door at the droplet separator, the individual frames may be pulled out into the surroundings and be cleaned, e.g. by flushing or exchange.
  • This is a great advantage, since in connection with the cleaning of filters the user does not have to disassemble the air cleaner or stand inside the air cleaner in connection with the cleaning of filters.
  • fig. 1 shows an example of a system incorporated in a box
  • fig. 2 shows the system with an open door and two droplet separators during extraction. Description of an exemplary embodiment
  • the air cleaning system according to the invention may be incorporated in a box, pipe or container 2, as shown in fig. 1.
  • the left end of the box is connected with the exhaust openings of the animal house, which may be a pig or poultry house, via channels (not shown).
  • Means are mounted in the interior of the box to provide a liquid mist which the admitted animal house air passes on its way through the system, that is from the left to the right in the drawing.
  • the exhaustion of the ventilation air takes place via one or more ventilators 6 mounted at the opposite end of the box.
  • the liquid which is emitted in droplet form, creates, together with the air, a liquid mist which absorbs the substances which might be present in the animal house air during the passage through the liquid mist.
  • These substances may be ammonia and hydrogen sulphide as well as other chemical odour substances, which are to be removed from the animal house air before it is discharged to the surroundings.
  • ammonia acid is added to the water, while base is added in case of hydrogen sulphide/odour.
  • a droplet separator 4a, 4b, as shown in fig. 2 is mounted to capture and absorb the liquid in the mist containing these substances.
  • Fig. 2 shows two droplet separators, but, of course, there may be both fewer and more depending on the need.
  • Each droplet separator consists of a row of vertically arranged lamellae or pipes 9a, 9b, which extend vertically across the entire cross-sectional area of the box.
  • the first droplet separator 4b seen in the direction of flow, has its iamel- lae/pipes 9b mounted with a slightly greater distance between the individual lamellae/pipes, as shown in the drawing.
  • They may moreover be configured with waves, as indicated in the drawing, in order to better provide impact faces for the liquid-containing air during its passage between the lamellae.
  • projections in the form of bulges or the like may be provided in another manner, which will serve as droplet separators when the liquid mist strikes against the lamellae.
  • the lamellae/pipes 9a in the subsequent separator 4a may be slightly narrower and with a smaller mutual distance in order to better separate the last residues of liquid in the air at the passage through the separator.
  • the lamellae/pipes are shown incorporated in an annular frame 7a and 7b, which stabilize the separator and moreover allow it to be displaced, as will now be explained.
  • the box 2 is provided with a door 3 at the droplet separators 4a and 4b which may be opened by being folded down, as shown in fig. 2.
  • Slide guides 8a and 8b for guiding the droplet separators may be mounted on the internal side of the door, so that they may slide on the door with a view to extraction and insertion.
  • the precipitated liquid which may be used as a fertilizer, may be drawn off via a pipe stub 10, following which it may be conveyed to a container (not shown) or the like.
  • the door 3 may be closed by means of brackets 3a and may moreover rest on supports 5 mounted in the box, as shown in fig. 2.
  • the system according to the invention is very efficient and, owing to the easy possibility of cleaning the droplet separators, will operate with the lowest possible consumption of energy and time for maintenance as well as cleaning. Since only energy for the ventilator 6 is needed, this results in a high operational reliability with a minimal need for maintenance.

Abstract

The invention relates to an animal house ventilation system (1), in which animal house air, when passing horizontally through the system in a box (2), passes through a liquid mist, which may contain acid or base, and then passes through a droplet separator (4a and 4b), where the liquid in the air is precipitated by striking against droplet separators in the form of vertically mounted lamellae (9a and 9b), so that the liquid may be collected at the bottom of the box (2). The lamellae (9a and 9b) in the droplet separator may be provided with projections in the form of waves, bulges and the like in order to better form impact faces for the liquid in the air. Each droplet separator (4a and 4b) may be pulled out of the box; (2) via a door (3) with a view to cleaning by flushing for the removal of dust and feathers, etc. Following this, the cleaned droplet separators may be inserted into the box (2), and the door (3) is closed, and then cleaning may be resumed. This ensures simple and efficient cleaning, as the droplet separators may be cleaned easily.

Description

AN AIR CLEANING SYSTEM The prior art The invention relates to an air cleaning system, in particular for the cleaning of exhaust air from pig and poultry houses, said system being incorporated in a box, container, and in which a device for emitting liquid droplets in mist form is mounted in the first part, the air supply part. Such systems are primarily used for remedying ammonia and odourjiui- sances and for providing an effective animal house ventilation, which results in a considerably reduction in the air pollution around the animal houses, while ensuring a suitably clean atmosphere for the animals in the animal house.
It is known to use filter blocks which are sprayed with liquid, where the liquid runs from above and downwards.
This known solution, however, is vitiated by the drawback that the filter is rapidly clogged fully or partly, in particular with dust/feathers, which causes a considerably consumption of energy for ventilation, since the flow of air is limited in step with the clogging. Moreover, much time has to be spent on the cleaning of the filter block, and, consequently, it has not been possible to use the technology in poultry houses.
The object of the invention
It is the object of the invention to remedy these defects of known filters, and this is achieved according to the invention by a system, where a liquid mist admixed with base/acid is emitted in order to capture odour/ammonia, and a droplet separator is arranged subsequently, consisting of lamellae/pipes arranged in parallel which extend across the entire cross-section of the box to capture and precipitate liquid when the liquid droplets with the air pass the droplet separator via the gaps between the lamellae in an essentially horizontal direction of flow.
A very effective air cleaning system for animal houses or other dusty industries is achieved in this surprisingly simple manner, which does not suffer from the drawback of rapid clogging to any appreciable extent, as the use of liquid mist followed by droplet separators does not clog to the same degree, and, therefore, no increasing consumption of energy for the ventilation system will occur in operation.
Further, the lamellae or the pipes will be effective droplet separators, since the liquid will be captured and passed down along the lamellae to the bot- torn, where the liquid may be collected in order to be used as a fertilizer.
This is an extremely expedient solution, since it partly reduces the possibility of dust/feathers settling in the separator, partly collects liquid in an effective manner.
The liquid is valuable since it contains fertilizing substance as regards collection of nitrogen from the ammonia-containing air, which has been neutralized with acid in the spray water. When, as stated in claim 2, the lamellae or the pipes are provided with projecting impact areas in the form of waves or bulges, an effective droplet separator is achieved, since all the sucked liquid-containing air will touch a point on one of the lamellae. This takes place without any tendency that dust/feathers will settle firmly on the lamellae and thereby limit the flow.
When, as stated in claim 3, the lamellae/pipes are incorporated in a frame, it is easy to handle the droplet separator, and it is also ensured that the lamellae remain stable in the frames.
When, as stated in claim 4, several droplet separators are mounted in ex- tension of each other, an unprecedentedly high efficiency may be achieved, since the lamellae/pipes in the individual separators may be mounted with an increasing mutual distance in the direction of the air flow.
When, as stated in claim 5, the system is provided with a door at the droplet separator, the individual frames may be pulled out into the surroundings and be cleaned, e.g. by flushing or exchange. This is a great advantage, since in connection with the cleaning of filters the user does not have to disassemble the air cleaner or stand inside the air cleaner in connection with the cleaning of filters.
Finally, it is expedient, as stated in claim 6, to provide the door with a slide guide on the internal side in order to ensure that the door may serve as a slide guide for the frames when the individual droplet separators are pulled out and inserted.
The drawing
An example of the invention will be described more fully below with reference to the drawing, in which fig. 1 shows an example of a system incorporated in a box, and fig. 2 shows the system with an open door and two droplet separators during extraction. Description of an exemplary embodiment
The air cleaning system according to the invention may be incorporated in a box, pipe or container 2, as shown in fig. 1.
The left end of the box is connected with the exhaust openings of the animal house, which may be a pig or poultry house, via channels (not shown).
Means (not shown) are mounted in the interior of the box to provide a liquid mist which the admitted animal house air passes on its way through the system, that is from the left to the right in the drawing. The exhaustion of the ventilation air takes place via one or more ventilators 6 mounted at the opposite end of the box. The liquid, which is emitted in droplet form, creates, together with the air, a liquid mist which absorbs the substances which might be present in the animal house air during the passage through the liquid mist.
These substances may be ammonia and hydrogen sulphide as well as other chemical odour substances, which are to be removed from the animal house air before it is discharged to the surroundings. When ammonia is involved, acid is added to the water, while base is added in case of hydrogen sulphide/odour. A droplet separator 4a, 4b, as shown in fig. 2, is mounted to capture and absorb the liquid in the mist containing these substances.
Fig. 2 shows two droplet separators, but, of course, there may be both fewer and more depending on the need.
Each droplet separator consists of a row of vertically arranged lamellae or pipes 9a, 9b, which extend vertically across the entire cross-sectional area of the box.
The first droplet separator 4b, seen in the direction of flow, has its iamel- lae/pipes 9b mounted with a slightly greater distance between the individual lamellae/pipes, as shown in the drawing.
They may moreover be configured with waves, as indicated in the drawing, in order to better provide impact faces for the liquid-containing air during its passage between the lamellae.
Instead of waves, projections in the form of bulges or the like may be provided in another manner, which will serve as droplet separators when the liquid mist strikes against the lamellae.
The lamellae/pipes 9a in the subsequent separator 4a may be slightly narrower and with a smaller mutual distance in order to better separate the last residues of liquid in the air at the passage through the separator. To ensure the stability of the droplet separator, the lamellae/pipes are shown incorporated in an annular frame 7a and 7b, which stabilize the separator and moreover allow it to be displaced, as will now be explained.
The box 2 is provided with a door 3 at the droplet separators 4a and 4b which may be opened by being folded down, as shown in fig. 2.
Slide guides 8a and 8b for guiding the droplet separators may be mounted on the internal side of the door, so that they may slide on the door with a view to extraction and insertion.
Since some dust and in case of poultry houses also feathers may be pre- sent in the exhausted animal house air, there is a risk that dust and feather may settle on the lamellae. This will reduce the efficiency of the droplet separator and thereby the ability to capture liquid and convey it down into the bottom of the box, as the flow of air will be reduced in step with the settling of dust and feathers. This will cause the consumption of energy to be increased.
To ensure the most economic operation of the system, it is therefore desirable to be able to clean the separator, e.g. by means of a high pressure flusher, when the droplet separator is pulled out.
The precipitated liquid, which may be used as a fertilizer, may be drawn off via a pipe stub 10, following which it may be conveyed to a container (not shown) or the like.
The door 3 may be closed by means of brackets 3a and may moreover rest on supports 5 mounted in the box, as shown in fig. 2.
The system according to the invention is very efficient and, owing to the easy possibility of cleaning the droplet separators, will operate with the lowest possible consumption of energy and time for maintenance as well as cleaning. Since only energy for the ventilator 6 is needed, this results in a high operational reliability with a minimal need for maintenance.

Claims

PATENT CLAIMS
1. An air cleaning system, in particular for the cleaning of exhaust air from pig and poultry houses, said system being incorporated in a box, pipe, container, and wherein a mist chamber in the form of a device for emitting liquid droplets in mist form is provided in the first part, the air supply end, said system being novel in that a droplet separator (4a, 4b) is arranged after the mist chamber in the box (2), consisting of lamellae or pipes (9a, 9b) arranged in parallel which extend across the entire cross-section of the box (2) for collecting and precipitating liquid, when the liquid droplets with the air pass the droplet separator in an essentially horizontal direction of flow via the gap between the lamellae/pipes (9a, 9b).
2. An air cleaning system according to claim 1 , which is novel in that the lamellae or pipes (9a, 9b) of the droplet separator are dented and/or provided with waves to create protruding impact faces for the liquid-containing air, when it passes through the separator.
3. An air cleaning system according to claims 1 and 2, which is novel in that each droplet separator (4a, 4b) is incorporated in a frame (7a, 7b) so that each droplet separator forms a unit which may be pulled out and cleaned.
4. An air cleaning system according to claims 2 and 3, which is novel in that the individual droplet separators may have different distances between the lamellae/pipes (9a, 9b), so that the separator (7a) disposed closest to the inlet has a greater distance than the subsequent separator or separators (4b).
5. An air cleaning system according to claim 3, which is novel in that the box (2) is provided with a door (3) at the droplet separator (4a, 4b), which door (3) may be opened for the extraction of the droplet separator.
6. An air cleaning system according to claim 5, which is novel in that the door (3) may be folded down and form slide guides (8a, 8b) for the droplet separator (4a, 4b), when it is extracted with a view to cleaning and subsequent insertion into the box (2).
PCT/DK2014/000048 2013-10-01 2014-09-30 An air cleaning system WO2015048969A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK201300148U DK201300148U3 (en) 2013-10-01 2013-10-01 AIR PURIFICATION
DKBA201300148 2013-10-01

Publications (1)

Publication Number Publication Date
WO2015048969A1 true WO2015048969A1 (en) 2015-04-09

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PCT/DK2014/000048 WO2015048969A1 (en) 2013-10-01 2014-09-30 An air cleaning system

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WO (1) WO2015048969A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107413117A (en) * 2017-07-03 2017-12-01 合肥天翔环境工程有限公司 A kind of board-like demister
CN110038397A (en) * 2019-05-14 2019-07-23 北京市畜牧业环境监测站 Livestock and poultry cultivation house ammonia emission reduction device
US20230321587A1 (en) * 2022-04-07 2023-10-12 The United States Of America, As Represented By The Secretary Of Agriculture System for removing ammonia, dust and pathogens from air within an animal rearing/sheltering facility

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9203062U1 (en) * 1992-03-09 1993-07-15 Schoenhammer, Johann, 8317 Mengkofen, De
WO2006026818A1 (en) * 2004-09-10 2006-03-16 Malcolm Coleman Odour reduction apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9203062U1 (en) * 1992-03-09 1993-07-15 Schoenhammer, Johann, 8317 Mengkofen, De
WO2006026818A1 (en) * 2004-09-10 2006-03-16 Malcolm Coleman Odour reduction apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107413117A (en) * 2017-07-03 2017-12-01 合肥天翔环境工程有限公司 A kind of board-like demister
CN110038397A (en) * 2019-05-14 2019-07-23 北京市畜牧业环境监测站 Livestock and poultry cultivation house ammonia emission reduction device
CN110038397B (en) * 2019-05-14 2024-01-26 北京市畜牧总站 Ammonia emission reduction device for livestock and poultry raising house
US20230321587A1 (en) * 2022-04-07 2023-10-12 The United States Of America, As Represented By The Secretary Of Agriculture System for removing ammonia, dust and pathogens from air within an animal rearing/sheltering facility

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