CA2629553A1 - Tank fluids treatment system and method - Google Patents
Tank fluids treatment system and method Download PDFInfo
- Publication number
- CA2629553A1 CA2629553A1 CA 2629553 CA2629553A CA2629553A1 CA 2629553 A1 CA2629553 A1 CA 2629553A1 CA 2629553 CA2629553 CA 2629553 CA 2629553 A CA2629553 A CA 2629553A CA 2629553 A1 CA2629553 A1 CA 2629553A1
- Authority
- CA
- Canada
- Prior art keywords
- gas
- tank
- gas treatment
- head space
- treatment unit
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000012530 fluid Substances 0.000 title description 3
- 238000009434 installation Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims description 10
- 235000019645 odor Nutrition 0.000 claims description 4
- 244000052769 pathogen Species 0.000 claims description 3
- 238000000855 fermentation Methods 0.000 claims description 2
- 230000004151 fermentation Effects 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 52
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 7
- 238000006303 photolysis reaction Methods 0.000 description 6
- 230000015843 photosynthesis, light reaction Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000001699 photocatalysis Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical class O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000000937 inactivator Effects 0.000 description 1
- 229910052500 inorganic mineral Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000012421 spiking Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/18—Radiation
- A61L9/20—Ultraviolet radiation
-
- 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
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4516—Gas separation or purification devices adapted for specific applications for fuel vapour recovery systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Treating Waste Gases (AREA)
Abstract
A method for treating tank head space gases includes evacuating a gas from the head space, passing the gas through a UV emitter in a gas treatment chamber and returning the gas to the head space. A tank installation for operation of the method includes a liquid storage tank having a head space, and a gas treatment unit having a UV
emitter, where the gas treatment unit is adjacent the tank, and where the installation further includes intake and return pipes for respectively conveying the head space gas to and from the gas treatment unit.
emitter, where the gas treatment unit is adjacent the tank, and where the installation further includes intake and return pipes for respectively conveying the head space gas to and from the gas treatment unit.
Description
Tank Fluids Treatment System and Method ound Background In liquid storage tanks, the head space fluids can create problems regarding disposal and facility maintenance.
Summary:
In accordance with aspects of the invention there is provided:
(1) A method for treating tank head space gasses, the method comprising:
evacuating a gas from a head space of a tank;
passing the gas through a gas treatment chamber wherein the gas passes through a chamber including a UV emitter to obtain treated gas; and returning the treated gas to the head space of the tank.
and/or (2) A tank installation comprising:
D M S Le ga I\051995 \00014\Z 8 5 65 5 6v 1 a tank for storing a liquid, the tank including an upper enclosure;
a gas treatment unit positioned adjacent the tank, the gas treatment unit including a UV
emitter;
an intake pipe including an inlet end and an outlet end, the inlet end positioned and opening into the tank adjacent the upper enclosure and the outlet end opening into the gas treatment unit; and a return pipe extending from the gas treatment unit to a discharge end positioned and opening into the tank adjacent the upper enclosure.
It is to be understood that other aspects of the present invention will become readily apparent to those skilled in the art from the following detailed description, wherein various embodiments of the invention are shown and described by way of illustration. As will be realized, the invention is capable for other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
Accordingly the drawings and detailed description are to be regarded as illustrative in nature and not as restnctive.
Brief Description of the Drawings Referring to the drawings, several aspects of the present invention are illustrated by way of example, and not by way of limitation, in detail in the figures, wherein:
Figures la and lb are a schematic side elevation and top plan view, respectively, of a tank installation according to one aspect of the present invention.
Detailed Description of Various Embodiments The description that follows, and the embodiments described therein, is provided by way of illustration of an example, or examples, of particular embodiments of the principles of various aspects of the present invention. These examples are provided for the purposes of explanation, and not of limitation, of those principles and of the invention in its various aspects. In the description, similar parts are marked throughout the specification and the drawings with the same DM S Lega 1A051995 ,00014128565 56v 1 respective reference numerals. The drawings are not necessarily to scale and in some instances proportions may have been exaggerated in order more clearly to depict certain features.
With reference to Figures IA and 1B, a tank installation is shown including a tank for storing a liquid, the tank including an upper enclosure; a gas treatment unit positioned adjacent the tank, the gas treatment unit including a UV emitter; an intake pipe including an inlet end and an outlet end, the inlet end positioned and opening into the tank adjacent the upper enclosure and the outlet end opening into the gas treatment unit; and a return pipe extending from the gas treatment unit to a discharge end positioned and opening into the tank adjacent the upper enclosure.
The tank may take various forms, including for example, submersible media pump station, a wet well, oil storage tank, waste water storage tank, fermentation tank, etc. The tank may be above ground or fully or partially buried, as shown.
By positioning the inlet end and the discharge end in the tank adjacent the upper enclosure, these ends may be positioned in the head space of the tank above any liquids contained therein.
The gas treatment unit may include any of various units for treatment of gases by UV emissions.
Such a gas treatment unit may effect photocatalytic oxidation, which is a process of gas oxidization that utilizes photon energy emitted from ultraviolet (alternatively referred to herein as UV) light lamps, either of the low pressure or of the medium pressure variety, operating at wavelengths ranging roughly between 170 and 255 nanometers, but favoring the former end (also known as the UV-Vacuum range). Photon energy catalyses a chain of photochemical reactions that lead to four contemporaneous processes: the photolysis of oxygen in the form of 02; the photolysis of the oxidizing agent 03 (ozone) formed during the UV
irradiation of oxygen; the photolysis of water molecules (H20); and the photolysis of pollutant molecules and decay products. The ozone that is produced during the first photolytic reaction, the photolysis of oxygen, occurs with the intervention of UV light at the 185 nm frequency. This ozone acts then more as a catalyst for further reactions than as an oxidant itself, and ultimately most remaining ozone is degraded back to stable 02 by the action of UV light at 254 nm. The intervening ozone in tandem with the photolysis of water molecules in the ambient air together lead to the production of hydroxyl radicals (OH-) thusly: O+ H20 --> OH- and 03 + H20 + hv --> 02+
H202 followed by H202 + hv - OH- (where hv stands for the energy from UV
light).
DMSLegal\05 ] 995\00014`2856556v1 Hydroxyl radicals are highly efficient oxidants, more so than ozone, and react more quickly with volatile molecules. The molecules of contaminant gases that make up nuisance odors (including a broad range of compounds such as hydrocarbons or VOCs, solvents, ammonia, sulfurous and chlorinated compounds) are degraded in two ways: First, contaminated gases are degraded directly by the action of UV photons, to the extent that their particular UV
absorption coefficient allows as different gasses break down at different wavelength and energy levels. Second, contaminant gases are degraded under the oxidizing effect of the hydroxyl radicals, which break down the odorous compounds by attacking the molecular bonds, starting with double bonds.
Each breakdown process itself releases a number of OH- active radicals, which in turn go to work on the next degrading reaction, in a self-reinforcing mechanism that ultimately leads to the complete mineralization of the pollutant molecules into carbon dioxide, water vapor and mineral acids or elemental forms of sulfur, chlorine and nitrogen.
A variation of photocatalytic oxidation, dubbed Advanced Photocatalytic Oxidation (APO) has been also applied. It is defined by the complementary utilization of any of ozone, hydrogen peroxide H202 or reactive material surfaces such as titanium dioxide Ti02 in tandem with the UV energy. While APO is deemed to yield higher oxidation performance, it comes also with higher costs to operate and bulkiness to the apparatus.
Applicant has suggested various gas treatment units employing UV emitters such as those described in US 2001/0043887 and US 2004/0071589, incorporated herein by reference. Such a unit may include a housing containing ultraviolet lamps and means for motivating the airflow through the housing so as to generate hydroxyl radicals in the airflow as the airflow passes through the housing. The lamps may be a single such lamp or an array of such lamps. In one embodiment, the apparatus includes a housing containing an array of ultraviolet lamps mounted within an enclosure in the housing. The enclosure has an intake aperture and an exhaust aperture. The housing and the array form an airflow processor such that uncontaminated air entering the intake aperture passes through the array before exiting the exhaust aperture. An airflow motivator, which maybe a fan, urges the airflow through the housing and the array from the intake aperture and out through the exhaust aperture.
DMSLegalA05199510001412856556v1 The gas treatment unit can be positioned outside the tank at various spacings and positionings therefrom.
The installation may allow certification for high risk areas. For example, Class 1 DIV 2, (Groups B, C & D) CSA or equivilant ratings may be obtained.
The installation may include a further gas treatment system. In one embodiment, this further gas treatment system may be positioned along the return line. In such an installation the further gas treatment system may include for example chemical deodorizers, chemical inactivators, etc.
Such systems may include water or chemical misters, charcoal, biological media, etc. to deodorize or otherwise treat the gas.
The tank installation may include a vent opening from the upper enclosure of the tank to vent head space gasses to the atmosphere.
The gas treatment unit may be operated to regularly or continuously recirculate gas from the head space such that undesired components of the gas are removed. As such, for example, H2S
and other corrosive gas concentrations may be controlled effectively, significantly reducing corrosion in the tank head space. This installation may maintain the concentration of any H2S
emissions to low levels, eliminating the spiking of H2S at unsafe concentrations. In other tank systems, the gas treatment unit may be useful to destroy pathogens in the tank head space, which may otherwise be exhausted from the tank. The installation may avoid the need for a water supply, chemicals and the use of activated carbon based or other odor control media. If other media are used in the installation, the operation of the UV emitter in the system may extend the life of chemical media, which can be installed downstream of the UV emitter.
The invention provides a method for treating tank head space gasses, the method comprising:
evacuating a gas from a head space of a tank; passing the gas through a gas treatment unit wherein the gas passes through a chamber including a UV emitter to obtain treated gas; and returning the treated gas to the head space of the tank.
The gas treatment unit may be operated to reduce odors, to reduce concentrations of H2S, corrosive chemicals and/or pathogens in the gas.
DM S Lega I\051995\000142856556v 1 After the gas treatment unit, the treated gas may be passed through a further gas treatment system including for example one or more of a chemical extractor, a chemical eliminator, etc.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to those embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the full scope consistent with the claims, wherein reference to an element in the singular, such as by use of the article "a" or "an" is not intended to mean "one and only one"
unless specifically so stated, but rather "one or more". All structural and functional equivalents to the elements of the various embodiments described throughout the disclosure that are know or later come to be known to those of ordinary skill in the art are intended to be encompassed by the elements of the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. No claim element is to be construed under the provisions of 35 USC 112, sixth paragraph, unless the element is expressly recited using the phrase "means for" or "step for".
DMSLega1\051995100014\2856556v 1
Summary:
In accordance with aspects of the invention there is provided:
(1) A method for treating tank head space gasses, the method comprising:
evacuating a gas from a head space of a tank;
passing the gas through a gas treatment chamber wherein the gas passes through a chamber including a UV emitter to obtain treated gas; and returning the treated gas to the head space of the tank.
and/or (2) A tank installation comprising:
D M S Le ga I\051995 \00014\Z 8 5 65 5 6v 1 a tank for storing a liquid, the tank including an upper enclosure;
a gas treatment unit positioned adjacent the tank, the gas treatment unit including a UV
emitter;
an intake pipe including an inlet end and an outlet end, the inlet end positioned and opening into the tank adjacent the upper enclosure and the outlet end opening into the gas treatment unit; and a return pipe extending from the gas treatment unit to a discharge end positioned and opening into the tank adjacent the upper enclosure.
It is to be understood that other aspects of the present invention will become readily apparent to those skilled in the art from the following detailed description, wherein various embodiments of the invention are shown and described by way of illustration. As will be realized, the invention is capable for other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
Accordingly the drawings and detailed description are to be regarded as illustrative in nature and not as restnctive.
Brief Description of the Drawings Referring to the drawings, several aspects of the present invention are illustrated by way of example, and not by way of limitation, in detail in the figures, wherein:
Figures la and lb are a schematic side elevation and top plan view, respectively, of a tank installation according to one aspect of the present invention.
Detailed Description of Various Embodiments The description that follows, and the embodiments described therein, is provided by way of illustration of an example, or examples, of particular embodiments of the principles of various aspects of the present invention. These examples are provided for the purposes of explanation, and not of limitation, of those principles and of the invention in its various aspects. In the description, similar parts are marked throughout the specification and the drawings with the same DM S Lega 1A051995 ,00014128565 56v 1 respective reference numerals. The drawings are not necessarily to scale and in some instances proportions may have been exaggerated in order more clearly to depict certain features.
With reference to Figures IA and 1B, a tank installation is shown including a tank for storing a liquid, the tank including an upper enclosure; a gas treatment unit positioned adjacent the tank, the gas treatment unit including a UV emitter; an intake pipe including an inlet end and an outlet end, the inlet end positioned and opening into the tank adjacent the upper enclosure and the outlet end opening into the gas treatment unit; and a return pipe extending from the gas treatment unit to a discharge end positioned and opening into the tank adjacent the upper enclosure.
The tank may take various forms, including for example, submersible media pump station, a wet well, oil storage tank, waste water storage tank, fermentation tank, etc. The tank may be above ground or fully or partially buried, as shown.
By positioning the inlet end and the discharge end in the tank adjacent the upper enclosure, these ends may be positioned in the head space of the tank above any liquids contained therein.
The gas treatment unit may include any of various units for treatment of gases by UV emissions.
Such a gas treatment unit may effect photocatalytic oxidation, which is a process of gas oxidization that utilizes photon energy emitted from ultraviolet (alternatively referred to herein as UV) light lamps, either of the low pressure or of the medium pressure variety, operating at wavelengths ranging roughly between 170 and 255 nanometers, but favoring the former end (also known as the UV-Vacuum range). Photon energy catalyses a chain of photochemical reactions that lead to four contemporaneous processes: the photolysis of oxygen in the form of 02; the photolysis of the oxidizing agent 03 (ozone) formed during the UV
irradiation of oxygen; the photolysis of water molecules (H20); and the photolysis of pollutant molecules and decay products. The ozone that is produced during the first photolytic reaction, the photolysis of oxygen, occurs with the intervention of UV light at the 185 nm frequency. This ozone acts then more as a catalyst for further reactions than as an oxidant itself, and ultimately most remaining ozone is degraded back to stable 02 by the action of UV light at 254 nm. The intervening ozone in tandem with the photolysis of water molecules in the ambient air together lead to the production of hydroxyl radicals (OH-) thusly: O+ H20 --> OH- and 03 + H20 + hv --> 02+
H202 followed by H202 + hv - OH- (where hv stands for the energy from UV
light).
DMSLegal\05 ] 995\00014`2856556v1 Hydroxyl radicals are highly efficient oxidants, more so than ozone, and react more quickly with volatile molecules. The molecules of contaminant gases that make up nuisance odors (including a broad range of compounds such as hydrocarbons or VOCs, solvents, ammonia, sulfurous and chlorinated compounds) are degraded in two ways: First, contaminated gases are degraded directly by the action of UV photons, to the extent that their particular UV
absorption coefficient allows as different gasses break down at different wavelength and energy levels. Second, contaminant gases are degraded under the oxidizing effect of the hydroxyl radicals, which break down the odorous compounds by attacking the molecular bonds, starting with double bonds.
Each breakdown process itself releases a number of OH- active radicals, which in turn go to work on the next degrading reaction, in a self-reinforcing mechanism that ultimately leads to the complete mineralization of the pollutant molecules into carbon dioxide, water vapor and mineral acids or elemental forms of sulfur, chlorine and nitrogen.
A variation of photocatalytic oxidation, dubbed Advanced Photocatalytic Oxidation (APO) has been also applied. It is defined by the complementary utilization of any of ozone, hydrogen peroxide H202 or reactive material surfaces such as titanium dioxide Ti02 in tandem with the UV energy. While APO is deemed to yield higher oxidation performance, it comes also with higher costs to operate and bulkiness to the apparatus.
Applicant has suggested various gas treatment units employing UV emitters such as those described in US 2001/0043887 and US 2004/0071589, incorporated herein by reference. Such a unit may include a housing containing ultraviolet lamps and means for motivating the airflow through the housing so as to generate hydroxyl radicals in the airflow as the airflow passes through the housing. The lamps may be a single such lamp or an array of such lamps. In one embodiment, the apparatus includes a housing containing an array of ultraviolet lamps mounted within an enclosure in the housing. The enclosure has an intake aperture and an exhaust aperture. The housing and the array form an airflow processor such that uncontaminated air entering the intake aperture passes through the array before exiting the exhaust aperture. An airflow motivator, which maybe a fan, urges the airflow through the housing and the array from the intake aperture and out through the exhaust aperture.
DMSLegalA05199510001412856556v1 The gas treatment unit can be positioned outside the tank at various spacings and positionings therefrom.
The installation may allow certification for high risk areas. For example, Class 1 DIV 2, (Groups B, C & D) CSA or equivilant ratings may be obtained.
The installation may include a further gas treatment system. In one embodiment, this further gas treatment system may be positioned along the return line. In such an installation the further gas treatment system may include for example chemical deodorizers, chemical inactivators, etc.
Such systems may include water or chemical misters, charcoal, biological media, etc. to deodorize or otherwise treat the gas.
The tank installation may include a vent opening from the upper enclosure of the tank to vent head space gasses to the atmosphere.
The gas treatment unit may be operated to regularly or continuously recirculate gas from the head space such that undesired components of the gas are removed. As such, for example, H2S
and other corrosive gas concentrations may be controlled effectively, significantly reducing corrosion in the tank head space. This installation may maintain the concentration of any H2S
emissions to low levels, eliminating the spiking of H2S at unsafe concentrations. In other tank systems, the gas treatment unit may be useful to destroy pathogens in the tank head space, which may otherwise be exhausted from the tank. The installation may avoid the need for a water supply, chemicals and the use of activated carbon based or other odor control media. If other media are used in the installation, the operation of the UV emitter in the system may extend the life of chemical media, which can be installed downstream of the UV emitter.
The invention provides a method for treating tank head space gasses, the method comprising:
evacuating a gas from a head space of a tank; passing the gas through a gas treatment unit wherein the gas passes through a chamber including a UV emitter to obtain treated gas; and returning the treated gas to the head space of the tank.
The gas treatment unit may be operated to reduce odors, to reduce concentrations of H2S, corrosive chemicals and/or pathogens in the gas.
DM S Lega I\051995\000142856556v 1 After the gas treatment unit, the treated gas may be passed through a further gas treatment system including for example one or more of a chemical extractor, a chemical eliminator, etc.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to those embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the full scope consistent with the claims, wherein reference to an element in the singular, such as by use of the article "a" or "an" is not intended to mean "one and only one"
unless specifically so stated, but rather "one or more". All structural and functional equivalents to the elements of the various embodiments described throughout the disclosure that are know or later come to be known to those of ordinary skill in the art are intended to be encompassed by the elements of the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. No claim element is to be construed under the provisions of 35 USC 112, sixth paragraph, unless the element is expressly recited using the phrase "means for" or "step for".
DMSLega1\051995100014\2856556v 1
Claims (8)
1. A method for treating tank head space gasses, the method comprising:
evacuating a gas from a head space of a tank; passing the gas through a gas treatment chamber wherein the gas passes through a chamber including a UV emitter to obtain treated gas; and returning the treated gas to the head space of the tank.
evacuating a gas from a head space of a tank; passing the gas through a gas treatment chamber wherein the gas passes through a chamber including a UV emitter to obtain treated gas; and returning the treated gas to the head space of the tank.
2. The method of claim 1 wherein gas treatment chamber reduces odors in the gas.
3. The method of claim 1 wherein the gas treatment chamber reduces concentrations of H2S
in the gas.
in the gas.
4. The method of claim 1 wherein the gas treatment chamber reduces concentrations of corrosive chemicals in the gas.
5. The method of claim 1 wherein the gas treatment chamber reduces concentrations of pathogens in the gas.
6. The method of claim 1 wherein the treated gas is passed through a chemical extractor.
7. The method of claim 1 wherein the tank is part of a submersible media pump station, wet well, oil tank, waste water tanks, fermentation tanks.
8. A tank installation comprising:
a tank for storing a liquid, the tank including an upper enclosure;
a gas treatment unit positioned adjacent the tank, the gas treatment unit including a UV
emitter;
an intake pipe including an inlet end and an outlet end, the inlet end positioned and opening into the tank adjacent the upper enclosure and the outlet end opening into the gas treatment unit; and a return pipe extending from the gas treatment unit to a discharge end positioned and opening into the tank adjacent the upper enclosure.
a tank for storing a liquid, the tank including an upper enclosure;
a gas treatment unit positioned adjacent the tank, the gas treatment unit including a UV
emitter;
an intake pipe including an inlet end and an outlet end, the inlet end positioned and opening into the tank adjacent the upper enclosure and the outlet end opening into the gas treatment unit; and a return pipe extending from the gas treatment unit to a discharge end positioned and opening into the tank adjacent the upper enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2629553 CA2629553A1 (en) | 2008-04-21 | 2008-04-21 | Tank fluids treatment system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2629553 CA2629553A1 (en) | 2008-04-21 | 2008-04-21 | Tank fluids treatment system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2629553A1 true CA2629553A1 (en) | 2009-10-21 |
Family
ID=41212271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2629553 Abandoned CA2629553A1 (en) | 2008-04-21 | 2008-04-21 | Tank fluids treatment system and method |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2629553A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1025868B1 (en) * | 2017-12-29 | 2019-07-31 | Europem Technologies Nv | VAPOR TREATMENT UNIT |
-
2008
- 2008-04-21 CA CA 2629553 patent/CA2629553A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1025868B1 (en) * | 2017-12-29 | 2019-07-31 | Europem Technologies Nv | VAPOR TREATMENT UNIT |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9408937B2 (en) | Photo-catalyzing fluid mobilizing system and method | |
| CN102641644B (en) | Waste gas treatment air purification device | |
| KR101044810B1 (en) | Volatile organic compounds treatment apparatus and odor treatment apparatus using the same | |
| KR101066709B1 (en) | High concentration odor gas or industrial waste disposal method and apparatus | |
| CN104258726B (en) | A kind of device of photocatalysis treatment volatile organic matter | |
| CN108246097A (en) | A kind of method and device based on low-temperature plasma, microwave and photo catalysis oxidation processes organic exhaust gas | |
| JP2008036513A (en) | Unit and system for gas treatment | |
| JP4923435B2 (en) | Hazardous substance treatment equipment | |
| CN110813052A (en) | Comprehensive treatment system and treatment method for VOC (volatile organic compound) organic waste gas | |
| CA2417346C (en) | Odor control through air-facilitated injection of hydroxyl radicals | |
| JP2005205094A (en) | Air purification system | |
| KR20190105823A (en) | Offensive odor treatment apparatus using dual UV ramp and adsorbent | |
| CN204337990U (en) | A kind of UV photodissociation cleaning equipment processing petrifaction sewage stench | |
| CA2629553A1 (en) | Tank fluids treatment system and method | |
| CN111013384A (en) | Dual-band photocatalytic purification ultraviolet lamp tube and air purification device | |
| CN105617828A (en) | System for purifying VOC waste gas generared by Cigarette packaging and printing | |
| CN205461722U (en) | Low cigarette package printing VOC processing apparatus that pollutes | |
| CN211800043U (en) | Dual-waveband photocatalytic purification ultraviolet lamp tube air purification device | |
| KR100478803B1 (en) | Processing methode for air purification and equipment therefor | |
| TWM457859U (en) | Air purifying system | |
| KR100372535B1 (en) | the Apparatus and Method for Decomposing Volatile Gaseous Organic Compound | |
| KR102666451B1 (en) | Wet and dry type scrubber cleaning system for removing high concentration discharge gas | |
| KR102659361B1 (en) | Malodorous gas treatment system | |
| KR102570464B1 (en) | System for cleaning discharge gas and polluted cleaning water in scrubber | |
| WO2000069477A1 (en) | Process for preventing air pollution by using ultraviolet ray |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDC | Correction of dead application (reinstatement) | ||
| EEER | Examination request |
Effective date: 20140422 |
|
| FZDE | Dead |
Effective date: 20181025 |