• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method and apparatus for purifying VOC-containing gases. In the process, a gas containing VOCs is passed through an inlet pipe (9) to an inlet zone from where the gas is transferred to a first catalyst zone where most of the VOCs are oxidized, followed by a gas to a second catalyst zone where the remainder of the VOCs are oxidized. The purified gas is removed by means of an exhaust pipe (10). According to the invention, each catalyst zone is arranged in its own chamber (1, 1 ') and the inlet zone and the outlet zone, respectively, are arranged in an intermediate space (2, 3) which separates the catalyst zones from each other. The heat released during the oxidation of the VOCs is recovered by heat exchangers arranged in at least the second catalyst zone and the gas flow from the inlet zone to the first catalyst zone is controlled by a directional valve. The solution can reduce the size of the equipment and reduce the emissions caused by the reversal of the gas supply.
    公开号:FI20195017A1
    申请号:FI20195017
    申请日:2019-01-11
    公开日:2020-07-12
    发明作者:Reijo Lylykangas
    申请人:Vocci Oy；
    IPC主号:
    专利说明:

    The invention relates to a method for manufacturing a VOC gas treatment apparatus. The invention also relates to an apparatus manufactured by this method and to the use of such apparatus. EU solvent emissions are regulated by legislation based on the so-called VOC Directive EC1999 / 13. The Directive incorporates the Best Available Technology (BAT) principle, which obliges public authorities to use more stringent standards than those laid down in the Directive, provided that affordable and reliable technology is commercially available to achieve them. The Directive lays down industry- and emission-specific standards for industrial solvent emissions (VOCs) ranging from 50 to 150 mg C / nm '. As emission abatement technology has advanced, authorities are setting much stricter requirements for all direct and indirect greenhouse gases due to new global warming data. - Many of the VOCs are greenhouse gases with GWP (Global Warming Potential) values a few times more than 3,000 times more harmful than carbon dioxide (CO). As an indirect value, the IPCC, the Intergovernmental Panel on Climate Change, has reported that VOCs are 11 times worse than CO. This is due to the combined production of ground-level ozone by VOC-> emissions and NOx emissions. 5 25 = There are several ways to reduce VOC emissions. Paints and varnishes containing z water or less solvents can be used. The general trend in a N emissions is towards lower concentrations, which places new demands on emission treatment equipment 3.
    O S 30 VOC emissions are characterized by their concentration in the gas being so low and still going lower that it is not enough to produce the energy needed for combustion, but combustion requires very efficient heat recycling or concentration of VOC gases. The most commonly used technique for disposing of VOCs is thermal combustion and - followed by catalytic oxidation. Both can use a recuperative or regenerative heat exchanger to preheat the gas entering the incinerator. The recuperative heat exchanger has an efficiency of 65% at best and regenerative up to 95%. The prior art is represented by FI 10329, CN 203642204 and WO 2011067471. The main difference between catalytic and thermal combustion is the combustion temperature, which is about 800 ° C in thermal combustion and about 300 ° C in catalytic combustion. This means that thermal combustion requires almost three times more energy to heat the gas stream to the reaction temperature than catalytic combustion. The solvent content of thermal regenerative combustion to produce the energy required for combustion is 2-3 g / nm '. In catalytic combustion, it is 0.5 to 1.0 g / nm ', respectively. This concentration is called the autothermal point (ATP).
    The weakness of regenerative combustion plants is that the gas flow direction must be reversed between two storage / preheating units (beds). In this case, during the reversal, a smaller amount of crude gas enters the exhaust pipe, which reduces the efficiency of the combustion plant. The so - called two - bed thermal incineration plant achieves a purification efficiency of about 96% 5 25, which is still too low to meet the above - mentioned emission - specific I standards. The object of the present invention is to eliminate at least some of the disadvantages associated with the prior art and to provide a novel solution for the treatment and purification of VOC-containing gases.
    The invention is based on the idea that a gas containing VOCs is subjected to a catalytic treatment in at least two catalyst zones for the oxidation and combustion of VOCs.
    Each catalyst zone is located in its own chamber and the gas inlet zone and the outlet zone, respectively, are located in an intermediate space separating the catalyst zones. The heat released during the oxidation of the VOCs is recovered by heat exchangers arranged in at least one other catalyst zone. The gas flow from the inlet zone to the first catalyst zone is controlled - by a directional valve, which minimizes emissions from reversing the gas flow direction. In the apparatus according to the invention, the first and second catalyst chambers are connected to an intermediate space separating them, the first part of which is provided with a purge gas inlet pipe and the second part of which is provided with a purge gas outlet pipe, the purge gas inlet pipe being connected to the desired chamber. In particular, the solution can reduce the size of the equipment and reduce emissions from gas reversal. More specifically, the method according to the invention and the apparatus o, respectively, are mainly characterized by what is set forth in the> characterizing parts of the independent claims. 5 25 = The invention provides considerable advantages. i N The present VOC gas treatment equipment and treatment method are technically very advantageous. In the new hardware, the chambers have been moved apart. Gas differs from previous solutions 2 30 - enters and exits through the space between the chambers. The intermediate space is divided from the middle N into a gas inlet part and an outlet part. The height of the intermediate space is preferably limited by a ‘canopy’,
    whereby additional heat sources can be placed here, with which heat can be introduced into the gas during the use of the equipment. A regenerative heat exchanger is the most efficient heat collector.
    With a catalytic combustion plant, due to its smaller size, the loss of reversal is in principle lower, so the efficiency is higher. The present solution can further improve the efficiency of such an incinerator and achieve new emission limits (default 5 mg / nm ”) that cannot be achieved with existing equipment. For example, compared to the solutions presented in FI 10329 and WO 2011067471, the present invention achieves significant improvements in precisely these aspects. The present invention achieves an emission limit of up to 5 mg / nm 'in situations where the autothermal point is as low as 0.5 g / nm'.
    The risks of incorrect combustion are substantially reduced when the burner and catalyst are separated into a different space.
    Controlling the gas flow in such a way that it changes direction, for example in a maximum of 0.1 second, significantly reduces the emissions caused by the gas flow reversal. In this case, a valve with a short stroke length is preferably used as the directional valve. This allows for a substantial increase in speed and the use of a double-acting cylinder.
    o In a thermal and catalytic combustion plant, the gas flow in both the heat exchanger and the catalyst is laminar. At the 5 25 flow rates used in the reactors in the RTO direct channels, the Nusselt and Sherwood figures are about 3.
    - They grow slowly almost linearly as the speed increases. In the X-flow channels that mix at the respective flow rates E, the numbers are 9-12, respectively. That is, the relative efficiency of heat and mass transfer N increases 3 to 4 times.
    3 S 30 Typically, incinerators are custom-made for each site and N are installed and commissioned by supplier personnel. The present new equipment can be used to produce a standard product series for several, eg seven,
    which can be easily installed and commissioned in the same way as many other devices. This makes a clear difference compared to current installations, which, due to their large size, are always installed on site.
    5 In one application, the hardware is plug and play in nature. The start-up and its control are then preferably carried out via the Internet. The devices can be connected to a network, through which it is possible to monitor and report the continuous use of the devices.
    - In summary, the following advantages of the invention can thus be presented: - the container is not needed for the plant but only for transport; this halves the volume, the calculated weight and the cost by up to about 30%; - the separation of the catalysts and the heat exchangers avoids the burner used for the start-up of the plant and the production of auxiliary energy from the catalysts; and - with the solution presented, only two valve actuating cylinders are needed instead of the previous four; this speeds up and simplifies control and reduces emissions during reversals.
    - By controlling the operation of the directional control valves by means of the actuator (s) installed or installed in the intermediate chamber, the size of the equipment can be further reduced compared to conventional plants.
    It has been possible to further reduce the size of the apparatus, in preferred embodiments of the invention, by shortening the stroke length of the directional valves. In conventional plants, the stroke length of the valves is typically the same as the diameter of the valve orifice. The cross-sectional area E of the outer circumference is unnecessarily large therein. It must be the same as the cross-sectional area of the valve orifice. This K allows a substantial increase in speed and the use of a double-acting cylinder.
    3> 30 - Embodiments of the invention will now be examined in more detail with the aid of the accompanying drawing.
    In the present context, “gases containing VOCs” or “VOCs” generally refer to gases containing low-boiling volatile organic compounds (VOCs). They typically have a boiling point below 250 ° C and a vapor pressure at 20 ° C of 0.01 kPa or more. Some of the compounds are gases already at room temperature. VOCs include e.g. aliphatic and aromatic hydrocarbons, chlorinated hydrocarbons, and alcohols, glycols, ethers and esters, and organic acids, ketones and aldehydes. Specific examples include hexane, butane, benzene, xylene, styrene, methylene chloride, dichloroethane, trichloromethane, trichloroethane and ethyl acetate. In addition, flammable inorganic compounds, such as carbon monoxide (CO), may accompany the gas, which - should also be oxidized. Typical examples of gases containing VOCs are gases containing solvents (solvent vapors) from industrial processes. In particular, VOCs can come from industrial processes that produce and use coatings, detergents, adhesives and printing inks. The gases to be treated in the present context typically contain at least 25 mg of VOCs, in particular at least 50 mg C / nm ', but the method and apparatus are also suitable for the treatment of gases with lower concentrations.
    In one preferred embodiment, the treatment apparatus comprises at least one gas supply section, at least two regenerative heat exchangers and at least one gas discharge section. At least one gas distribution section and at least one gas distribution valve are connected to the treatment apparatus for changing the flow direction of the feed gas between the regenerative heat exchangers. An exhaust valve is connected to the degassing section to control the flow of gas to the exhaust section. In one preferred embodiment, a stirring regenerative heat exchanger made of sheet metal 3 is used as the heat exchanger. The efficiency of such is very high (over 90 20). S 30 - VOC concentrations are usually so low that they do not produce enough energy. A heat exchanger and a low temperature catalyst with an efficiency of more than N 90% are required,
    so that the consumption of auxiliary energy does not increase or so that the plant can operate without auxiliary energy autothermically. At the same time, the new structure also makes the structure of the heat exchanger elements simpler and speeds up their manufacture. In total, equipment manufacturing costs are reduced by more than 30%. Figure 1 shows the layout of the base of one embodiment of the new hardware solution as a schematic diagram.
    An apparatus for purifying VOC-containing gases according to an embodiment of the drawing comprises at least two chambers, 1 and 1 ”, each containing a catalyst (not shown) and a heat exchanger. The heat exchangers in the catalyst chambers are typically regenerative. Heat recovery is described in more detail below.
    The chambers contain a treated gas supply connection 6, 6 ”and a treated gas outlet connection 7, 7”. Chambers 1 and 1 is connected to each other in one chamber (e.g. chamber 1) - to conduct oxidized gas to another chamber (1 °). In the drawing, the gas flow is indicated by an arrow running from left to right. The outlet is marked with a reference number
    8. o> In chambers 1 and 1 the heat exchangers and catalysts are arranged in a cascade so that the flow of VOC gas to be purified passes first through the heat exchanger and then through the catalyst. i N The first chamber 1 and the second chamber 1 ”are connected to the intermediate space 2, 3 separating them. 3 The first part of the space, i.e. the inlet zone 2, is equipped with a purge gas 2 inlet pipe 8 and the second part is provided with a purged gas outlet pipe 9. In the space 2 , 3 is a wall, especially a roof wall, equipped with a heat source,
    which can produce heat. Heat is typically needed to start the combustion process. Heat is usually also needed for driving below the autothermal point. In one application, an additional heat source comprising electrical resistors or a gas burner or a combination thereof is placed in the intermediate space of the equipment. The inlet pipe 9 of the gas to be cleaned (inlet gas) is connected to the supply connection 6 of the gas to be cleaned to supply the gas to the desired chamber. The supply connections 6 and 6 of the chambers can be opened and closed by a directional valve 4, i.e. a gas distribution valve. Correspondingly, the purified gas outlet pipe 10 is connected to the treated gas outlet connection 7, whereby the outlet connections 7 and 7 ”of the chambers can be opened and closed by a directional valve 5, i.e. a gas distribution valve.
    As can be seen from the figure, the catalyst chambers 1, 1 are separate units that can be manufactured separately and can be connected to each other via an intermediate space. The intermediate space 2, 3 can also be manufactured as a separate unit. The inlet zone 2 and the outlet zone 3 are part of the same housing-like device part, whereby they are separated from each other by a partition wall 11.
    The equipment can thus be assembled from three separate equipment parts. The reactor body in which all the functions described above are located can be made of two welded parts. o> The compact reactor design allows for a freer lay-out design. VOC-5 25 - incinerators can be loaded into transport containers open at one end and achieve - thus a freight advantage. Sea freight costs up to 70% when new products can be z transported by container.
    K 3 As stated above, the gas flow from the gas inlet pipe 8 through the inlet zone 2 2 to the first catalyst chamber 1 and from the second catalyst chamber 1 ”N to the outlet zone 3 and the outlet pipe 9, respectively, is controlled by a valve, in particular a directional valve.
    In one application, a directional valve is used, the reversal of which takes place in less than 0.5 seconds, in particular in less than 0.25 seconds, preferably in less than 0.15 seconds, preferably in less than 0.1 second or even in less than 0.075 seconds.
    One application uses a short-stroke valve. In a particularly preferred embodiment, a valve is used whose outer circumferential cross-sectional area is one quarter of the diameter of the valve, i.e. the area of the valve opening is [| x D% / 4 and the area of the gap in the outer circumference of the valve is | x D / 4 x D. In particular, such a solution enables a substantial increase in speed and the use of a double-acting cylinder. In one application, the operation of the directional valves is controlled, for example, by actuators 5, 5 ”mounted in the intermediate chamber 2, 3, for example by two actuators mounted inside the intermediate chamber.
    In one application, a direct-acting valve actuated by a compressed air cylinder is used as the gas distribution valve. One application uses a directional valve operated by a double-acting cylinder, such as a double-acting pneumatic cylinder. In another application, the gas distribution valve is a directional valve actuated by a stepper motor, in particular an electromechanical stepper motor. & = 25 Preferably, the directional control valves are operated electromechanically by a stepper motor. This is a quick way and is particularly advantageous if the intermediate temperature rises above 150 ° C. x a N In both of the above applications, the reversal of the valves occurs in less than 3 0.1 seconds when it is slower with conventional long stroke cylinders. 2 30 In one application, a directional valve is used, the actuator of which is arranged inside the inlet and outlet zones, respectively.
    The VOC-containing gas to be cleaned is preferably introduced alternately into the chambers of the equipment by means of a gas distribution valve.
    Correspondingly, the purified gas is removed alternately from the chambers of the apparatus.
    In practice, the purified gas is removed from a different (i.e. opposite) chamber from which the gas to be purified is fed.
    Thus, in one embodiment, the gas containing VOCs is passed to the first catalyst chamber for a first period of time and to the second catalyst chamber for a second period of time, with gas flow reversal from the first to the catalyst chamber to the directional valve and less than 0.1 second.
    Correspondingly, the purified gas is removed during the first period from the second catalyst chamber and during the second period from the first catalyst chamber, wherein the reversal of the gas flow from the first catalyst chamber to the second is performed by a directional valve and the reversal takes place in less than 0.1 second.
    As a result of the reversal of the gas supply direction, the “first” catalyst chamber defined in the present process, in which most of the oxidation takes place, is one of the chambers described above, and the “second” catalyst chamber in which heat is recovered is the other of these chambers, respectively. o Rapid reversal of valves is very important, as in regenerative combustion plants> almost all emissions are generated during reversals.
    In known solutions it is difficult to reach 20 mg / nm ', especially at higher emissions.
    The present technology has - it is possible to reach the 5 mg / nm ”limit without any exhaust gas after-treatment. x a N “Reversal” means that the gas flow is changed to take place in 3 different zones, ie different chambers.
    In this case, the flow of gas to one zone 2 30 - (chamber) stops and the flow to the other zone (chamber) begins.
    The gas flow N is preferably controlled by a directional valve.
    In particular, the reversal time is the time taken for the valve to close, i.e. the time taken for the valve to be fully (100%) open to be fully (100%) closed. At the same time, the passage to the second chamber is opened, whereby the opening takes the same time, but especially with separate cylinders, the opening usually takes place a little faster than - closing, which is due to the pressure of the flowing gas. Oxidation, or combustion, of a gas containing VOCs releases heat. This is preferably recovered. In one application, the equipment is equipped with heat exchangers. In one application, the heat exchangers are arranged in connection with at least one, - preferably in connection with both catalyst zones. In one application, most of the heat from the combustion of the gas containing VOCs is recovered by heat exchangers in a second catalyst zone (1 or 1 Depending on the flow direction). "Main part" then means more than 50%, in particular more than 60%, - preferably 70-100%, for example about 75-100% of the amount of heat released during the oxidation of the VOCs. The hardware according to the above application is used as follows. The VOC-containing gas is typically introduced into the inlet zone of the equipment by a fan (not shown), especially a fan in front of which a particulate filter is arranged. The gas, controlled by valve 4, passes through a heat storage (not shown) to the first catalyst 1, where most of the VOC emissions are oxidized. The gas then passes through a second catalyst 2 where the rest of the VOC emissions are oxidized. Catalytic combustion 5 25 - is carried out at approx. 300 ° C. The gas then passes through a heat accumulator (not shown) and - transfers most of the heat to it. The gas then passes through the outlet valve 4 ”and z the rear chamber 3 to the outlet pipe.
    N 3 Commercial oxidation catalysts, such as S 30 noble metal catalysts, for example with Pt or Pd carbon, are suitable catalysts for catalytic combustion. Various N Honeycomb solutions and other multilayer catalyst structures can also be used.
    One application uses Pt / Pd catalysts, especially metal cell Pt / Pd catalysts with a mixed cross-flow cell structure. These operate for most hydrocarbons at a temperature of about 300 ° C. The precious metal charge is, for example, 30 g / ft ”.
    A particular advantage of precious metal catalysts is that they oxidize the combustible inorganic compounds contained in the gases to be treated, such as carbon monoxide. This can already take place at around 150 ° C, which contributes to the oxidation of the actual VOC emissions.
    - The present solution reduces VOC emissions by more than 99.5%. The equipment can be used to purify VOC gases so that the VOC content of the exhaust gas is less than about 5 mg / nm ”. Preferably, the present solution achieves this emission limit of 5 mg / nm 'even in situations where the autothermal point is 0.5 g / nm' or less.
    - The equipment is suitable for handling gases containing industrial solvent emissions. One application deals with gases having a VOC content of at least 25 mg, e.g. at least 50 mg C / nm '.
    - The hardware structure significantly reduces the total volume of the hardware. This is also influenced by the use of electrically or pneumatically actuated actuators (such as cylinders) inside the chamber, which avoids the long-arm o pneumatic cylinders of conventional combustion plants 4-6. Any changes made to the prior art will reduce the> device size by more than 50%.
    5 25 I Thus, an apparatus with a capacity greater than E 20,000 nm '/ h according to the above structure can be manufactured with a volume of less than 15 m ”.
    N 3 For comparison, it can be mentioned that a conventional technology plant 2 30 - with a volume of 37 m ”with a capacity of 16,000 nm” / h.
    The new equipment is thus 60% smaller despite the higher capacity. As a result, the weight of the equipment is reduced by more than 30% compared to the previous ones. The main advantages over previous models are: - The container is not needed for the plant but only for transport. This halves the volume, the calculated weight and the cost by approx. 30% - The catalysts and heat exchangers have been moved apart. This avoids the burner used in the start-up of the plant and in the production of support energy from the catalysts.
    - Only two drive cylinders are needed instead of the previous four. Control is speeded up and simplified, and emissions during reversal are reduced. It should also be noted that although a structure consisting of two chambers has been described above, it is of course possible to implement the structure shown in several chambers (e.g. 3-6 chambers). Such multiple chambers may be arranged in a cascade or in parallel. Reference number list 1, 1 regenerative heat exchanger and catalysts 2 gas inlet chamber 3 gas outlet chamber 4.4 directional valve o 5.5 directional valve actuator 2 6, 6 chamber inlet connection 5 25 77 chamber outlet connection = 8 chamber outlet E 9 gas inlet pipe N 10 gas outlet pipe 3 11 partition> O 30
    Reference publications FI 10329 CN 203642204 WO 2011067471 p O
    N>
    I a a OF O LO O O OF
    权利要求:
    Claims (18)
    [1]
    A method for purifying VOC-containing gases, characterized in that - a gas containing VOCs is passed through an inlet pipe to an inlet zone from where the gas is transferred to a first catalyst zone where most of the VOCs are oxidized, and the resulting gas is passed to a second catalyst zone oxidizing, - after which the gas is led to an exhaust zone from which the gas is removed by means of an exhaust pipe, - wherein - each catalyst zone is located in its own chamber and the inlet zone and the discharge zone are located in an intermediate space separating the catalyst zones; with heat exchangers arranged in at least the second catalyst zone, and - the flow of gas from the inlet zone to the first catalyst zone is controlled by a directional valve.
    [2]
    Process according to Claim 1, characterized in that the gas flow - from the second catalyst zone to the outlet zone is controlled by a directional valve.
    [3]
    Method according to Claim 1 or 2, characterized in that a directional valve is used, the reversal of which takes place in less than 0.25 seconds, in particular in less than 0.1 N seconds. 5 25 —-
    [4]
    Method according to one of the preceding claims, characterized in that E is a directional control valve actuated by a pneumatic cylinder, such as a double-acting N pneumatic cylinder, or a stepper motor, in particular an electromechanical stepper motor. 3 S 30 -
    [5]
    Method according to one of the preceding claims, characterized in that a short-stroke directional valve is used.
    [6]
    Method according to one of the preceding claims, characterized in that a directional valve is used, the actuator of which is arranged inside the inlet and outlet zones, respectively.
    [7]
    Process according to one of the preceding claims, characterized in that the gas containing VOCs is introduced for a first period of time into the first catalyst zone and for a second period of time to the second catalyst zone, the gas flow from the first catalyst zone to the second In 1 second.
    [8]
    Process according to one of the preceding claims, characterized in that the purified gas is removed from the second catalyst zone for a first period and from the first catalyst zone for a second period, wherein - reversing the gas flow from the first catalyst zone to the second is carried out by a directional valve and less than 0.1 per second.
    [9]
    Method according to one of the preceding claims, characterized in that the intermediate space has a wall, in particular a roof wall, which is provided with a heat source which - can produce the heat required, for example, to start the combustion process or drive below an autothermal point. o
    [10]
    Process according to one of the preceding claims, characterized in that the heat released from the oxidation of the gas containing> VOCs is mainly recovered by heat exchangers in the second catalyst zone. z
    [11]
    Method according to one of the preceding claims, characterized in that the N VOC-containing gas is introduced into the inlet zone by a fan, in particular a fan 3, in front of which a particulate filter is arranged. 2 30
    [12]
    Process according to one of the preceding claims, characterized in that the VOC content of the exhaust gas is less than about 5 mg / nm '.
    [13]
    13. An apparatus for purifying VOC-containing gases, the apparatus comprising - at least two chambers containing a catalyst arranged to oxidize VOCs from a gas fed to the chamber, the chambers comprising a treated gas supply connection and a treated gas outlet connection, - the chambers being connected to each other in a chamber for conducting oxidized gas to a second chamber, wherein - the chambers have heat exchangers for recovering the heat released in the oxidation of VOCs, characterized in that - the first and second chambers are connected to a separating space, a first part provided with a gas inlet with a gas outlet pipe, wherein - the gas inlet pipe to be cleaned is connected by a directional valve to supply the gas to be cleaned to the desired chamber.
    [14]
    Apparatus according to claim 12, characterized in that the purified gas outlet pipe is connected to a gas outlet connection treated with a directional valve.
    [15]
    Apparatus according to claim 12 or 13, characterized in that the directional valve actuator is a pneumatic cylinder, such as a double-acting pneumatic cylinder, or a stepper motor, in particular an electromechanical stepper motor, said actuator being preferably arranged inside the apparatus.
    [16]
    Apparatus according to one of Claims 12 to 14, characterized in that - the heat exchangers of the catalyst chambers are regenerative.
    [17]
    Tr a N 17. Apparatus according to one of Claims 12 to 15, characterized in that the intermediate space 3 has a wall, in particular a roof wall, which is provided with a heat source> 30 - capable of generating the heat required, for example .
    [18]
    Apparatus according to one of Claims 12 to 16, characterized in that the total volume of the apparatus with a capacity of more than 20,000 nm '/ h is less than 15 m'.
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    类似技术:
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    同族专利:
    公开号 | 公开日
    WO2020144409A3|2020-09-17|
    EP3908394A2|2021-11-17|
    FI128603B|2020-08-31|
    WO2020144409A2|2020-07-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CA2192534C|1996-12-10|2002-01-29|Danilo Klvana|Process and apparatus for gas phase exothermic reactions|
    FI20096286A|2009-12-04|2011-06-05|Formia Emissions Control Oy|VOC gas treatment equipment|
    CA2689004A1|2009-12-22|2011-06-22|Hristo Sapoundjiev|Method and apparatus for a hybrid flow reversal catalytic reactor|
    FI10329U1|2013-08-05|2013-12-12|Formia Smart Flow Hong Kong Ltd|gas treatment|
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    FI20195017A|FI128603B|2019-01-11|2019-01-11|Apparatus for treatment of VOC gases|FI20195017A| FI128603B|2019-01-11|2019-01-11|Apparatus for treatment of VOC gases|
    EP20715939.3A| EP3908394A2|2019-01-11|2020-01-10|Method and apparatus for treatment of voc gases|
    PCT/FI2020/050020| WO2020144409A2|2019-01-11|2020-01-10|Apparatus for treatment of voc gases|
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