CN215692953U - Oil fume adsorption catalytic purification device - Google Patents
Oil fume adsorption catalytic purification device Download PDFInfo
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- CN215692953U CN215692953U CN202120989103.0U CN202120989103U CN215692953U CN 215692953 U CN215692953 U CN 215692953U CN 202120989103 U CN202120989103 U CN 202120989103U CN 215692953 U CN215692953 U CN 215692953U
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Abstract
The utility model provides an oil fume adsorption and catalytic purification device, which comprises an organic waste gas inlet, an adsorption and catalytic outer shell and an organic waste gas outlet according to the flowing direction of oil fume; the adsorption catalysis outer shell comprises an adsorption module and a catalysis module; the adsorption module comprises at least 2 adsorbent-filled mesh sheets; the catalytic module comprises a metal honeycomb loaded with a catalyst, a PTC heating system and a fan. The purification method of the device comprises an adsorption stage and a catalytic decomposition stage. The oil fume adsorption and catalytic purification device provided by the utility model has a simple structure, and can realize efficient decomposition and purification of organic waste gas in oil fume; the volume is small, and the device can be suitable for purifying organic waste gas in oil smoke discharged by a household range hood and a commercial small range hood; when the temperature of the catalyst is 140 ℃, the purification efficiency of the organic waste gas in the range hood can reach more than 90%.
Description
Technical Field
The utility model belongs to the technical field of waste gas treatment and environmental protection, and relates to a gas adsorption catalytic purification device, in particular to an oil fume adsorption catalytic purification device.
Background
Oil fume pollution is a serious environmental pollution, and long-term troubles are caused in the construction and development of many towns. The oil fume component generated by cooking food is complex, edible oil and food can generate a series of complex changes under the condition of high temperature, a large amount of thermal oxidation decomposition products are generated, and partial decomposition products are emitted into the air in the form of smoke to form the tobacco tar. For example, when edible oil is heated to 170 ℃, a small amount of smoke decomposed in the initial stage can appear, the decomposition speed is accelerated along with the continuous increase of the temperature, and when the temperature reaches 250 ℃, a large amount of oil smoke can appear. In the food cooking process, the formation routes of oil smoke are mainly as follows: thermal oxidative decomposition of lipids contained in fats and oils and foods themselves; carbohydrate, protein, amino acid and the like in the food undergo a Maillard reaction; secondary reaction products of the interaction between the intermediate or final products of the above reaction. Chinese residents have the traditional habit of high-temperature cooking, and the oil fume pollution generated by cooking is very serious.
The traditional kitchen oil fume treatment method always focuses on indoor ventilation, such as methods of arranging an exhaust fan, a range hood and the like in a kitchen. Good ventilation is effective in reducing pollution, but the treatment method only discharges the oil smoke generated in the kitchen to the atmosphere without treatment, and the oil smoke can still seriously pollute the environment and harm the health of human bodies. At present, domestic and foreign oil fume treatment technologies mainly comprise inertial separation, electrostatic deposition, filtration, washing and the like. The inertial separation is to separate oil mist particles from the air flow by means of inertia through changing the direction of the air flow, and the technology has the advantages of simple required equipment, small pressure drop, low purification efficiency and low requirement on oil fume pretreatment and oil fume purification effect; the electrostatic deposition adopts a double-zone electrodeposition or double-zone flushing electric precipitation mode and the like, and the principle is that when oil fume enters a high-voltage electric field, oil mist particles are charged on power plant action equipment, the technology has high purification efficiency and small pressure drop, but a polar plate of the equipment is difficult to clean, the daily maintenance is very complicated, and when a flushing method is adopted, the problem of waste liquid treatment also exists; the filtering is carried out by filter cloth filtering, fiber filtering and the like, and the principle is that when oil smoke passes through a filtering layer, the oil smoke is removed by the action of power capture and the like, the technology has high purification efficiency, reliable operation and large pressure drop, but the single-layer protection action time is short; the washing is provided with a Venturi washing tower, a spray tower and the like, the oil smoke is transferred from gas phase to liquid phase through gas-liquid contact, and the oil smoke smell can be removed simultaneously according to the property of washing liquid, but the technology has low purification efficiency on submicron-grade oil smoke particles and also has the problem of treatment of the washing liquid. Moreover, the above-mentioned various technologies have the problems of high operation cost and secondary pollution, which makes them difficult to be popularized and applied for a long time.
CN 101406787a discloses a catalytic bed, a catalyst and a catalytic adsorption device of a high-efficiency oil smoke purification system of a range hood. The device is arranged at a smoke discharge air outlet of the range hood, and is purified by utilizing a catalytic bed, a catalyst and a catalytic adsorption device to treat oil smoke waste gas generated by the range hood. The device is complex in composition and inconvenient to maintain, and is only suitable for kitchens of large restaurants.
1999 forest and et al propose a water mist and water film type kitchen lampblack purification device, which comprises a purification type fume exhaust hood, a low-noise induced draft fan, a circulating pump and a circulating water tank; the purification type smoke exhaust hood is used for removing oil mist and peculiar smell. The device mainly transfers oil smoke from a gas phase to a liquid phase through gas-liquid contact, and the method has the problem of secondary pollution (refer to a water mist and water film type kitchen oil smoke purification device, forest bin and the like, environmental protection science, volume 25, phase 2, pages 27-30).
CN 212987335U discloses a low noise oil smoke purifier, the device includes clarifier casing, fan and rotating fan, install the amortization shell of making by the abatvoix in the clarifier casing, the amortization shell covers rotating electrical machines, centrifuge box and fan, the flue gas pipeline intercommunication in the clarifier casing is on the centrifuge box, the both sides of centrifuge box are flue gas input pipeline and flue gas output pipeline respectively in the clarifier casing, the entry of flue gas input pipeline is equipped with the dust separation net, the inside of flue gas input pipeline is provided with except that oil net and first amortization net, be connected with the tube-shape filter screen on the output shaft in the centrifuge box. The device adopts the inertial separation method to remove the oil smoke, but the method has low purification efficiency and is only suitable for the oil smoke pretreatment and occasions with low requirements on the oil smoke purification effect.
Therefore, providing a simple, compact and efficient device to decompose and treat organic waste gas in oil smoke has become one of the problems to be solved in the field.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide an oil fume adsorption catalytic purification device. The oil fume adsorption and catalytic purification device provided by the utility model has a simple structure, and can realize high-efficiency decomposition and purification of organic waste gas in oil fume; and the volume is small, and the device can be used for purifying organic waste gas in oil smoke discharged by household range hoods and small commercial range hoods.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides an oil fume adsorption and catalytic purification device, which comprises an organic waste gas inlet, an adsorption and catalytic outer shell and an organic waste gas outlet according to the flowing direction of oil fume;
the adsorption catalysis outer shell comprises an adsorption module and a catalysis module;
the adsorption module comprises at least 2 adsorbent-filled mesh sheets;
the catalytic module comprises a metal honeycomb loaded with a catalyst, a PTC heating system and a fan;
the PTC heating system is used for controlling the catalytic temperature of the catalyst;
the fan is used for realizing the circulation of hot air flow inside the adsorption and catalysis outer shell and sweeping the oil fume adsorbed on the adsorption template.
The utility model controls the catalytic temperature of the catalyst by using the PTC heating system, can realize rapid temperature rise and temperature reduction by direct electric heating, has low energy consumption, and is very suitable for convenient treatment of organic waste gas in the range hood.
The oil fume catalytic purification device is simple in structure, and can realize efficient decomposition and purification of organic waste gas in oil fume; and the volume is small, and the device can be used for purifying organic waste gas in oil smoke discharged by household range hoods and small commercial range hoods. The oil fume adsorption and catalytic purification device provided by the utility model utilizes the organic waste gas inlet and the organic waste gas outlet to be arranged on the discharge pipeline of the range hood, and oil fume pumped by the range hood is conveyed to the oil fume adsorption and catalytic purification device provided by the utility model through the discharge pipeline, so that the high-efficiency decomposition and purification of the oil fume are realized.
Preferably, the bottom ends of the at least two mesh plates are respectively and independently obliquely arranged inside the adsorption and catalysis outer shell, and the tops of the at least two mesh plates are closed.
Preferably, the top convergence position of the at least two mesh plates is located at the central position of the organic waste gas outlet.
Preferably, the catalytic module is arranged in an area enclosed by the two mesh plates and the bottom of the adsorption catalytic outer shell.
Preferably, the PTC heating system is disposed between the fan and the catalyst-loaded metal honeycomb.
Preferably, the mesh of the mesh sheet has an equivalent diameter of 0.02-2cm, for example, 0.02cm, 0.04cm, 0.06cm, 0.08cm, 0.10cm, 0.12cm, 0.14cm, 0.16cm, 0.18cm or 2.0cm, but not limited to the values recited, and other values not recited in the range of values are equally applicable.
Preferably, the mesh sheet has a length of 25-30cm, for example 25cm, 25.5cm, 26cm, 26.5cm, 27cm, 27.5cm, 28cm, 28.5cm, 29cm, 29.5cm or 30cm, but is not limited to the values listed, and other values not listed in the numerical range are equally applicable.
Preferably, the mesh plate has a thickness of 1 to 10cm, and may be, for example, 1cm, 2cm, 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, 9cm or 10cm, but is not limited to the recited values, and other values not recited within the range of values are equally applicable.
Preferably, the width of the mesh plate is the same as the width of the adsorption catalytic outer shell.
The amount of the fume adsorbed by the adsorbent of the present invention is 40-160mg/g, for example, 40mg/g, 50mg/g, 60mg/g, 70mg/g, 80mg/g, 90mg/g, 100mg/g, 110mg/g, 120mg/g, 130mg/g, 140mg/g, 150mg/g or 160mg/g, but is not limited to the values listed, and other values not listed in the range of values are also applicable.
The adsorbent of the present invention is a conventional adsorbent, and exemplarily includes any one or a combination of at least two of activated carbon particles, molecular sieve particles, activated carbon honeycombs, molecular sieve honeycombs, activated carbon cellucotton, natural clay, MOF adsorbent, diatomaceous earth or vermiculite, and typical but non-limiting combinations include a combination of activated carbon particles and molecular sieve particles, a combination of molecular sieve particles, activated carbon honeycombs and molecular sieve honeycombs, a combination of activated carbon cellucotton, natural clay and MOF adsorbent, or a combination of MOF adsorbent, diatomaceous earth and vermiculite, and a combination of activated carbon particles, molecular sieve particles, activated carbon honeycombs, molecular sieve honeycombs, activated carbon cellucotton and natural clay.
The adsorbent of the present invention may be charged in a total amount of 1kg or less, for example, 1kg, 0.9kg, 0.8kg, 0.7gk, 0.6kg, 0.5kg, 0.4kg, 0.3kg, 0.2kg or 0.1kg, but is not limited to the values listed, and other values not listed in the numerical range are also applicable. The total filling amount is the total amount of the adsorbent in the adsorption module.
Preferably, the material of the metal honeycomb comprises FeCrAl alloy.
Preferably, the specific surface area of the metal honeycomb is 25-40m2/cm3For example, it may be 25m2/cm3、28m2/cm3、30m2/cm3、32m2/cm3、34m2/cm3、36m2/cm3、38m2/cm3Or 40m2/cm3But not limited to the recited values, other values not recited within the numerical range are equally applicable.
Preferably, the mesh number of the metal honeycomb is 200 meshes 600 meshes, for example, 200 meshes, 220 meshes, 240 meshes, 260 meshes, 280 meshes, 300 meshes, 320 meshes, 340 meshes, 360 meshes, 380 meshes, 400 meshes, 440 meshes, 460 meshes, 500 meshes, 540 meshes, 580 meshes or 600 meshes, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable.
Preferably, the metal honeycomb has a length of 10 to 20cm, for example 10cm, 11cm, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm, 18cm, 19cm or 20cm, but is not limited to the values listed, and other values not listed in the range of values are equally applicable.
Preferably, the metal honeycomb has a diameter of 4 to 10cm, for example 4cm, 5cm, 6cm, 7cm, 8cm, 9cm or 10cm, but is not limited to the recited values, and other values not recited in the range of values are equally applicable.
Illustratively, the catalyst of the utility model comprises Pt/CeZr/Al2O3、PtPd/CeZr/Al2O3、PtRu/CeZr/Al2O3、LaMnO3、NiCo2O4Or MnCoCuOxAny one or a combination of at least two of the above, typical but not limiting combinations include Pt/CeZr/Al2O3And PtPd/CeZr/Al2O3Combination of (1), PtPd/CeZr/Al2O3And PtRu/CeZr/Al2O3Combination of (1), LaMnO3、NiCo2O4And MnCoCuOxCombination of (1), Pt/CeZr/Al2O3、PtPd/CeZr/Al2O3And PtRu/CeZr/Al2O3Or PtRu/CeZr/Al2O3、LaMnO3、NiCo2O4And MnCoCuOxCombinations of (a) and (b).
Illustratively, the metal honeycomb supported catalyst of the present invention is 1.0 to 5.0 wt% of the metal honeycomb, and for example, may be 1.0 wt%, 1.5 wt%, 2.0 wt%, 2.5 wt%, 3.0 wt%, 3.5 wt%, 4.0 wt%, 4.5 wt%, or 5.0 wt%, but is not limited to the recited values, and other values not recited in the range of values are equally applicable.
Preferably, the PTC heating system comprises a PTC heating plate and a catalyst temperature detection controller;
preferably, the length of the PTC heating panel is 10 to 15cm, and may be, for example, 10cm, 10.5cm, 11cm, 11.5cm, 12cm, 12.5cm, 13cm, 13.5cm, 14cm, 14.5cm or 15cm, but is not limited to the enumerated values, and other unrecited values within the numerical range are also applicable.
Preferably, the ratio of the width to the length of the PTC heating plate is (0.8-1):1, and may be, for example, 0.8:1, 0.82:1, 0.84:1, 0.86:1, 0.88:1, 0.9:1, 0.92:1, 0.94:1, 0.96:1, 0.98:1 or 1:1, but is not limited to the recited values, and other values not recited within the range of values are equally applicable.
Preferably, the thickness of the PTC heating plate is 18 to 30mm, and may be, for example, 18cm, 19cm, 20cm, 21cm, 22cm, 23cm, 24cm, 25cm, 26cm, 27cm, 28cm, 29cm or 30cm, but is not limited to the values recited, and other values not recited within the range of values are also applicable.
Preferably, the diameter of the organic waste gas inlet is 14-18cm, for example, 14cm, 14.5cm, 15cm, 15.5cm, 16cm, 16.5cm, 17cm, 17.5cm or 18cm, but is not limited to the values recited, and other values not recited in the range of values are equally applicable.
Preferably, the organic waste gas inlet is connected with an organic waste gas inlet pipeline.
Preferably, the organic waste gas inlet duct is provided with a duct cover.
Preferably, the organic waste gas inlet duct has a length of 8-15cm, for example 8cm, 9cm, 10cm, 11cm, 12cm, 13cm, 14cm or 15cm, but is not limited to the values listed, and other values not listed in the range of values are equally applicable.
Preferably, the diameter of the organic waste gas outlet is 14-18cm, for example, 14cm, 14.5cm, 15cm, 15.5cm, 16cm, 16.5cm, 17cm, 17.5cm or 18cm, but is not limited to the values listed, and other values not listed in the range of values are equally applicable.
Preferably, the organic waste gas outlet is connected with an organic waste gas outlet pipeline.
Preferably, the organic waste gas outlet duct is provided with a pipe cap.
Preferably, the organic waste gas outlet duct has a length of 8-15cm, which may be, for example, 8cm, 9cm, 10cm, 11cm, 12cm, 13cm, 14cm or 15cm, but is not limited to, other values in the range of values not listed are equally applicable.
Preferably, the organic waste gas outlet pipeline is further provided with an organic waste gas outlet concentration detector.
Preferably, the length of the outer shell of the adsorption catalyst is 25-35cm, for example 25cm, 26cm, 27cm, 28cm, 29cm or 30cm, but is not limited to the recited values, and other values not recited in the range of values are equally applicable.
Preferably, the ratio of the width, length and height of the outer shell of the adsorption catalyst is (0.6-1):1: (0.7-1), and may be, for example, 0.6:1:0.7, 0.6:1:1, 0.7:1:0.8, 0.8:1:0.8, 0.9:1:0.8, 1:1:0.9 or 1:1:1, but is not limited to the recited values, and other values not recited in the range of values are equally applicable.
By using the oil fume adsorption and catalysis purification device provided by the utility model, the purification method of the oil fume adsorption and catalysis purification device comprises an adsorption stage and a catalysis stage.
The adsorption phase comprises the following steps:
respectively opening pipe covers of the organic waste gas inlet pipeline and the organic waste gas outlet pipeline, enabling oil smoke to enter the interior of the adsorption catalysis outer shell through the organic waste gas inlet, and after being adsorbed by the adsorption module, the oil smoke is discharged through the organic waste gas outlet;
the catalytic decomposition stage comprises the following steps:
(1) closing the organic waste gas inlet and the organic waste gas outlet, starting the PTC electric heating system to heat the catalyst, and controlling the temperature of the catalyst at 100-140 ℃;
(2) starting a fan, wherein the fan generates hot air flow by sweeping the PTC electric heating plate, and the hot air flow circularly sweeps the oil fume adsorbed on the adsorption module to enter the metal honeycomb loaded with the catalyst, so that the oil fume is decomposed into carbon dioxide and water;
(3) detecting the outlet concentration of the organic waste gas by an organic waste gas outlet detection device, and opening an organic waste gas outlet to discharge waste gas after the outlet concentration of the organic waste gas reaches the standard;
the standard for the transition from the adsorption phase to the catalytic decomposition phase is: the adsorption breakthrough of the adsorption module is saturated.
The inside of the adsorption and catalysis outer shell is divided into two areas by at least 2 mesh plates, and a catalysis module is arranged in a closed area enclosed by the mesh plates and the bottom of the adsorption and catalysis outer shell. After the fan is started, hot air flow is sucked into the fan after passing through the screen plate filled with the adsorbent and is exhausted through the catalytic module again, so that circulation of the hot air flow is realized inside the adsorption and catalysis outer shell.
Preferably, the period of replacement of the adsorbent on the adsorption module is 7-30 days, for example, 7 days, 10 days, 13 days, 16 days, 19 days, 22 days, 25 days, 28 days or 30 days, but not limited to the values listed, and other values not listed in the range of values are also applicable.
Preferably, the emission standard of the organic waste gas is 2-10mg/m3For example, it may be 2mg/m3、3mg/m3、4mg/m3、5mg/m3、6mg/m3、7mg/m3、8mg/m3、9mg/m3Or 10mg/m3But not limited to the recited values, other values not recited within the numerical range are equally applicable.
Compared with the prior art, the utility model has the beneficial effects that: the oil fume adsorption and catalytic purification device provided by the utility model has a simple structure, and can realize efficient decomposition and purification of organic waste gas in oil fume; the volume is small, and the device can be suitable for purifying organic waste gas in oil smoke discharged by a household range hood and a commercial small range hood; when the temperature of the catalyst is 140 ℃, the purification efficiency of the organic waste gas in the range hood can reach more than 90%.
Drawings
Fig. 1 is a schematic structural diagram of the oil fume adsorption catalytic purification device in embodiment 2.
Wherein: 1 is the absorption catalysis shell body, 2 is organic waste gas import, 3 is organic waste gas export, 4 is the otter board of filling the adsorbent, 5 is the metal honeycomb who has the catalyst of load, 6 is the PTC hot plate, 7 is organic waste gas export concentration detector, 8 is catalyst temperature detection controller, 9 is the fan.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
Example 1
The embodiment provides an oil fume adsorption and catalytic purification device as shown in fig. 1, which comprises an organic waste gas inlet 2, an adsorption and catalytic outer shell 1 and an organic waste gas outlet 3 according to the flowing direction of oil fume; the adsorption catalysis outer shell comprises an adsorption module and a catalysis module; the adsorption module comprises 2 screen plates 4 filled with adsorbent; the catalytic module comprises a metal honeycomb 5 loaded with a catalyst, a PTC heating system and a fan 9; the PTC heating system is used for controlling the catalytic temperature of the catalyst; the fan 9 is used for realizing the circulation of hot air flow inside the adsorption and catalysis outer shell and purging the oil fume adsorbed on the adsorption template.
The bottom ends of the 2 mesh plates 4 are respectively and independently obliquely arranged inside the adsorption and catalysis shell body 1, and the top parts of the two mesh plates are closed; the top closing position of the 2 mesh plates 4 is positioned at the central position of the organic waste gas outlet 3; the catalytic module is arranged in an area enclosed by the 2 mesh plates 4 and the bottom of the adsorption and catalysis outer shell 1; the PTC heating system is disposed between the fan 9 and the metal honeycomb 5 loaded with the catalyst.
The equivalent diameter of the screen plate 4 filled with the adsorbent is 0.02 cm; the length of the screen plate is 25 cm; the thickness of the mesh plate is 1 cm; the width of the screen plate is the same as that of the adsorption and catalysis outer shell; the oil fume adsorption amount of the adsorbent is 40 mg/g; the adsorbent comprises activated carbon particles, molecular sieve particles, activated carbon honeycombs and natural clay; the total amount of adsorbent charged was 0.3 kg.
The metal honeycomb is made of FeCrAl alloy; the surface area of the metal honeycomb is 40m2/cm3(ii) a The mesh number of the metal honeycomb is 200 meshes; the length of the metal honeycomb is 10 cm; the diameter of the metal honeycomb is 4 cm; the catalyst comprises Pt/CeZr/Al2O3、PtPd/CeZr/Al2O3And PtRu/CeZr/Al2O3(ii) a The metal honeycomb supported catalyst was 1.0 wt% of the metal honeycomb.
The PTC heating system comprises a PTC heating plate 6 and a catalyst temperature detection controller 8; the length of the PTC heating plate 6 is 10 cm; the ratio of the width to the length of the PTC heating plate 6 is 0.8: 1; the thickness of the PTC heating plate 6 is 18 cm.
The diameter of the organic waste gas inlet 2 is 14 cm; the organic waste gas inlet 2 is connected with an organic waste gas inlet pipeline; the organic waste gas inlet pipeline is provided with a pipe cover; the length of the organic waste gas inlet pipeline is 8 cm; the diameter of the organic waste gas outlet 3 is 14 cm; the organic waste gas outlet 3 is connected with an organic waste gas outlet pipeline; the organic waste gas outlet pipeline is provided with a pipe cover; the length of the organic waste gas outlet pipeline is 15 cm; the organic waste gas outlet pipeline is also provided with an organic waste gas outlet concentration detector 7.
The length of the adsorption catalysis outer shell is 25 cm; the ratio of the width, the length and the height of the adsorption and catalysis outer shell is 0.6:1: 0.7.
The oil fume adsorption catalytic purification device provided by the embodiment has a simple structure, and can realize high-efficiency decomposition and purification of organic waste gas in oil fume.
Example 2
The embodiment provides an oil fume adsorption catalytic purification device, which comprises an organic waste gas inlet 2, an adsorption catalytic outer shell 1 and an organic waste gas outlet 3 according to the flowing direction of oil fume; the adsorption catalysis outer shell comprises an adsorption module and a catalysis module; the adsorption module comprises 2 screen plates 4 filled with adsorbent; the catalytic module comprises a metal honeycomb 5 loaded with a catalyst, a PTC heating system and a fan 9; the PTC heating system is used for controlling the catalytic temperature of the catalyst; the fan 9 is used for realizing the circulation of hot air flow inside the adsorption and catalysis outer shell and purging the oil fume adsorbed on the adsorption template.
The bottom ends of the 2 mesh plates 4 are respectively and independently obliquely arranged inside the adsorption and catalysis shell body 1, and the top parts of the two mesh plates are closed; the top closing position of the 2 mesh plates 4 is positioned at the central position of the organic waste gas outlet 3; the catalytic module is arranged in an area enclosed by the 2 mesh plates 4 and the bottom of the adsorption and catalysis outer shell 1; the PTC heating system is disposed between the fan 9 and the metal honeycomb 5 loaded with the catalyst.
The equivalent diameter of the screen plate 4 filled with the adsorbent is 2 cm; the length of the screen plate is 35 cm; the thickness of the mesh plate is 10 cm; the width of the screen plate is the same as that of the adsorption and catalysis outer shell; the oil fume adsorption amount of the adsorbent is 120 mg/g; the adsorbent comprises activated carbon particles, molecular sieve particles, activated carbon honeycombs and natural clay; the total amount of adsorbent charged was 1 kg.
The metal honeycomb is made of FeCrAl alloy; the surface area of the metal honeycomb is 25m2/cm3(ii) a The mesh of the metal honeycombThe number is 400 meshes; the length of the metal honeycomb is 20 cm; the diameter of the metal honeycomb is 10 cm; the catalyst comprises Pt/CeZr/Al2O3、PtPd/CeZr/Al2O3And MnCoCuOx(ii) a The metal honeycomb supported catalyst was 5.0 wt% of the metal honeycomb.
The PTC heating system comprises a PTC heating plate 6 and a catalyst temperature detection controller 8; the length of the PTC heating plate 6 is 15 cm; the ratio of the width to the length of the PTC heating plate 6 is 1: 1; the thickness of the PTC heating plate 6 was 30 cm.
The diameter of the organic waste gas inlet 2 is 18 cm; the organic waste gas inlet 2 is connected with an organic waste gas inlet pipeline; the organic waste gas inlet pipeline is provided with a pipe cover; the length of the organic waste gas inlet pipeline is 15 cm; the diameter of the organic waste gas outlet 3 is 18 cm; the organic waste gas outlet 3 is connected with an organic waste gas outlet pipeline; the organic waste gas outlet pipeline is provided with a pipe cover; the length of the organic waste gas outlet pipeline is 15 cm; the organic waste gas outlet pipeline is also provided with an organic waste gas outlet concentration detector 7.
The length of the adsorption catalysis outer shell is 35 cm; the ratio of the width, the length and the height of the adsorption and catalysis outer shell is 0.8:1: 1.
The oil fume adsorption catalytic purification device provided by the embodiment has a simple structure, and can realize high-efficiency decomposition and purification of organic waste gas in oil fume.
Example 3
The embodiment provides an oil fume adsorption catalytic purification device, which comprises an organic waste gas inlet 2, an adsorption catalytic outer shell 1 and an organic waste gas outlet 3 according to the flowing direction of oil fume; the adsorption catalysis outer shell comprises an adsorption module and a catalysis module; the adsorption module comprises 3 adsorbent-filled mesh plates 4; the catalytic module comprises a metal honeycomb 5 loaded with a catalyst, a PTC heating system and a fan 9; the PTC heating system is used for controlling the catalytic temperature of the catalyst; the fan 9 is used for realizing the circulation of hot air flow inside the adsorption and catalysis outer shell and purging the oil fume adsorbed on the adsorption template.
The bottom ends of the 3 mesh plates 4 are respectively and independently obliquely arranged in the adsorption and catalysis shell body 1, and the tops of the 2 mesh plates are closed; the top closing position of the 2 mesh plates 4 is positioned at the central position of the organic waste gas outlet 3; the catalytic module is arranged in an area enclosed by the 2 mesh plates 4 and the bottom of the adsorption and catalysis outer shell 1; the PTC heating system is disposed between the fan 9 and the metal honeycomb 5 loaded with the catalyst.
The equivalent diameter of the screen plate 4 filled with the adsorbent is 2 cm; the length of the screen plate is 35 cm; the thickness of the mesh plate is 10 cm; the width of the screen plate is the same as that of the adsorption and catalysis outer shell; the oil fume adsorption amount of the adsorbent is 120 mg/g; the adsorbent comprises activated carbon particles, molecular sieve particles, activated carbon honeycombs and natural clay; the total amount of adsorbent charged was 1 kg.
The metal honeycomb is made of FeCrAl alloy; the surface area of the metal honeycomb is 30m2/cm3(ii) a The mesh number of the metal honeycomb is 600 meshes; the length of the metal honeycomb is 20 cm; the diameter of the metal honeycomb is 10 cm; the catalyst comprises Pt/CeZr/Al2O3、PtPd/CeZr/Al2O3And MnCoCuOx(ii) a The metal honeycomb supported catalyst was 2.0 wt% of the metal honeycomb.
The PTC heating system comprises a PTC heating plate 6 and a catalyst temperature detection controller 8; the length of the PTC heating plate 6 is 15 cm; the ratio of the width to the length of the PTC heating plate 6 is 1: 1; the thickness of the PTC heating plate 6 was 30 cm.
The diameter of the organic waste gas inlet 2 is 16 cm; the organic waste gas inlet 2 is connected with an organic waste gas inlet pipeline; the organic waste gas inlet pipeline is provided with a pipe cover; the length of the organic waste gas inlet pipeline is 15 cm; the diameter of the organic waste gas outlet 3 is 16 cm; the organic waste gas outlet 3 is connected with an organic waste gas outlet pipeline; the organic waste gas outlet pipeline is provided with a pipe cover; the length of the organic waste gas outlet pipeline is 15 cm; the organic waste gas outlet pipeline is also provided with an organic waste gas outlet concentration detector 7.
The length of the adsorption catalysis outer shell is 35 cm; the ratio of the width, the length and the height of the adsorption and catalysis outer shell is 1:1: 1.
The oil fume adsorption catalytic purification device provided by the embodiment has a simple structure, and can realize high-efficiency decomposition and purification of organic waste gas in oil fume.
Example 4
The embodiment provides an oil fume adsorption and catalytic purification device, which is the same as the embodiment 2 except that the width of a screen plate 4 is changed to be smaller than the width 4cm of an adsorption and catalytic outer shell body 1.
The oil fume adsorption catalytic purification device provided by the embodiment has a simple structure, and can realize high-efficiency decomposition and purification of organic waste gas in oil fume.
Comparative example 1
This comparative example provides an oil fume adsorption purification device which removes the catalytic module except the inside of the adsorption catalytic outer housing and is the same as example 2.
Comparative example 2
This comparative example provides a catalytic purification apparatus for flue gas from oil which is the same as that of example 2 except that the adsorption module inside the outer shell of the adsorption catalyst is removed.
Application example 1
The oil fume gas adsorption and catalytic purification device provided in the embodiment 1 is adopted in the application example, and the oil fume gas adsorption and catalytic purification device provided in the embodiment 1 is used for purifying organic waste gas in oil fume discharged by a household range hood. The purification process comprises an adsorption stage and a catalytic stage.
The adsorption phase comprises the following steps: the pipe covers of the organic waste gas inlet pipeline and the organic waste gas outlet pipeline are respectively opened, oil fume enters the inside of the adsorption catalysis shell body 1 through the organic waste gas inlet 2, and is exhausted through the organic waste gas outlet 3 after being adsorbed by the adsorption module.
The catalytic stage comprises the following steps:
(1) closing the organic waste gas inlet 2 and the organic waste gas outlet 3, starting the PTC electric heating system to heat the catalyst, and controlling the temperature of the catalyst to be 100 ℃;
(2) starting the fan 9, wherein the fan 9 generates hot air flow by sweeping the PTC electric heating plate 6, and the hot air flow circularly sweeps the oil fume adsorbed on the adsorption module to enter the metal honeycomb 5 loaded with the catalyst to decompose the oil fume into carbon dioxide and water;
(3) the organic waste gas outlet detection device 7 detects the outlet concentration of the organic waste gas, and the outlet concentration of the organic waste gas is less than or equal to 10mg/m3When the waste gas is exhausted, the organic waste gas outlet 3 is opened to discharge the waste gas;
the standard for the transition from the adsorption phase to the catalytic decomposition phase is: the adsorption breakthrough of the adsorption module is saturated.
When the oil fume adsorption and catalytic purification device provided by the application example is adopted to treat oil fume, when the temperature of the catalyst is 100 ℃, the purification efficiency of organic waste gas in the range hood is 50%.
Application example 2
This application example adopts an oil smoke gas adsorption catalysis purifier as provided in example 2, and this application example uses the oil smoke gas adsorption catalysis purifier provided in example 2 for purifying organic waste gas in the oil smoke discharged by the household range hood. The purification process comprises an adsorption stage and a catalytic stage.
The adsorption phase comprises the following steps: the pipe covers of the organic waste gas inlet pipeline and the organic waste gas outlet pipeline are respectively opened, oil fume enters the inside of the adsorption catalysis shell body 1 through the organic waste gas inlet 2, and is exhausted through the organic waste gas outlet 3 after being adsorbed by the adsorption module.
The catalytic stage comprises the following steps:
(1) closing the organic waste gas inlet 2 and the organic waste gas outlet 3, starting the PTC electric heating system to heat the catalyst, and controlling the temperature of the catalyst to be 100 ℃;
(2) starting the fan 9, wherein the fan 9 generates hot air flow by sweeping the PTC electric heating plate 6, and the hot air flow circularly sweeps the oil fume adsorbed on the adsorption module to enter the metal honeycomb 5 loaded with the catalyst to decompose the oil fume into carbon dioxide and water;
(3) the organic waste gas outlet detection device 7 detects the outlet concentration of the organic waste gas, and the outlet concentration of the organic waste gas is less than or equal to 10mg/m3When the temperature of the water is higher than the set temperature,opening the organic waste gas outlet 3 to discharge waste gas;
the standard for the transition from the adsorption phase to the catalytic decomposition phase is: the adsorption breakthrough of the adsorption module is saturated.
When the oil fume adsorption and catalytic purification device provided by the application example is adopted to treat oil fume, when the temperature of the catalyst is 100 ℃, the purification efficiency of organic waste gas in the range hood is 60%.
Application example 3
This application example adopts an oil smoke gas adsorption catalysis purifier as provided in example 2, and this application example uses the oil smoke gas adsorption catalysis purifier provided in example 2 for purifying organic waste gas in the oil smoke discharged by the household range hood. The purification process comprises an adsorption stage and a catalytic stage.
The adsorption phase comprises the following steps: the pipe covers of the organic waste gas inlet pipeline and the organic waste gas outlet pipeline are respectively opened, oil fume enters the inside of the adsorption catalysis shell body 1 through the organic waste gas inlet 2, and is exhausted through the organic waste gas outlet 3 after being adsorbed by the adsorption module.
The catalytic stage comprises the following steps:
(1) closing the organic waste gas inlet 2 and the organic waste gas outlet 3, starting the PTC electric heating system to heat the catalyst, and controlling the temperature of the catalyst to be 120 ℃;
(2) starting the fan 9, wherein the fan 9 generates hot air flow by sweeping the PTC electric heating plate 6, and the hot air flow circularly sweeps the oil fume adsorbed on the adsorption module to enter the metal honeycomb 5 loaded with the catalyst to decompose the oil fume into carbon dioxide and water;
(3) the organic waste gas outlet detection device 7 detects the outlet concentration of the organic waste gas, and the outlet concentration of the organic waste gas is less than or equal to 10mg/m3When the waste gas is exhausted, the organic waste gas outlet 3 is opened to discharge the waste gas;
the standard for the transition from the adsorption phase to the catalytic decomposition phase is: the adsorption breakthrough of the adsorption module is saturated.
When the oil fume adsorption and catalytic purification device provided by the application example is adopted to treat oil fume, when the temperature of the catalyst is 120 ℃, the purification efficiency of organic waste gas in the range hood is 73%.
Application example 4
This application example adopts an oil smoke gas adsorption catalysis purifier as provided in example 2, and this application example uses the oil smoke gas adsorption catalysis purifier provided in example 2 for purifying organic waste gas in the oil smoke discharged by the household range hood. The purification process comprises an adsorption stage and a catalytic stage.
The adsorption phase comprises the following steps: the pipe covers of the organic waste gas inlet pipeline and the organic waste gas outlet pipeline are respectively opened, oil fume enters the inside of the adsorption catalysis shell body 1 through the organic waste gas inlet 2, and is exhausted through the organic waste gas outlet 3 after being adsorbed by the adsorption module.
The catalytic stage comprises the following steps:
(1) closing the organic waste gas inlet 2 and the organic waste gas outlet 3, starting the PTC electric heating system to heat the catalyst, and controlling the temperature of the catalyst to be 140 ℃;
(2) starting the fan 9, wherein the fan 9 generates hot air flow by sweeping the PTC electric heating plate 6, and the hot air flow circularly sweeps the oil fume adsorbed on the adsorption module to enter the metal honeycomb 5 loaded with the catalyst to decompose the oil fume into carbon dioxide and water;
(3) the organic waste gas outlet detection device 7 detects the outlet concentration of the organic waste gas, and the outlet concentration of the organic waste gas is less than or equal to 10mg/m3When the waste gas is exhausted, the organic waste gas outlet 3 is opened to discharge the waste gas;
the standard for the transition from the adsorption phase to the catalytic decomposition phase is: the adsorption breakthrough of the adsorption module is saturated.
When the oil fume adsorption and catalytic purification device provided by the application example is adopted to treat oil fume, when the temperature of the catalyst is 140 ℃, the purification efficiency of organic waste gas in the range hood is 93%.
Application example 5
This application example adopts an oil smoke gas adsorption catalysis purifier as provided in embodiment 3, and this application example uses the oil smoke gas adsorption catalysis purifier as provided in embodiment 3 for purifying organic waste gas in the oil smoke discharged by the household range hood. The purification process comprises an adsorption stage and a catalytic stage.
The adsorption phase comprises the following steps: the pipe covers of the organic waste gas inlet pipeline and the organic waste gas outlet pipeline are respectively opened, oil fume enters the inside of the adsorption catalysis shell body 1 through the organic waste gas inlet 2, and is exhausted through the organic waste gas outlet 3 after being adsorbed by the adsorption module.
The catalytic stage comprises the following steps:
(1) closing the organic waste gas inlet 2 and the organic waste gas outlet 3, starting the PTC electric heating system to heat the catalyst, and controlling the temperature of the catalyst to be 120 ℃;
(2) starting the fan 9, wherein the fan 9 generates hot air flow by sweeping the PTC electric heating plate 6, and the hot air flow circularly sweeps the oil fume adsorbed on the adsorption module to enter the metal honeycomb 5 loaded with the catalyst to decompose the oil fume into carbon dioxide and water;
(3) the organic waste gas outlet detection device 7 detects the outlet concentration of the organic waste gas, and the outlet concentration of the organic waste gas is less than or equal to 10mg/m3When the waste gas is exhausted, the organic waste gas outlet 3 is opened to discharge the waste gas;
the standard for the transition from the adsorption phase to the catalytic decomposition phase is: the adsorption breakthrough of the adsorption module is saturated.
When the oil fume adsorption and catalytic purification device provided by the application example is adopted to treat oil fume, when the temperature of the catalyst is 120 ℃, the purification efficiency of organic waste gas in the range hood is 67%.
Application example 6
This application example adopts an oil smoke gas adsorption catalysis purifier as provided in embodiment 4, and this application example uses the oil smoke gas adsorption catalysis purifier provided in embodiment 4 for organic waste gas purification in the oil smoke that domestic lampblack absorber discharges. The purification process comprises an adsorption stage and a catalytic stage.
The adsorption phase comprises the following steps: the pipe covers of the organic waste gas inlet pipeline and the organic waste gas outlet pipeline are respectively opened, oil fume enters the inside of the adsorption catalysis shell body 1 through the organic waste gas inlet 2, and is exhausted through the organic waste gas outlet 3 after being adsorbed by the adsorption module.
The catalytic stage comprises the following steps:
(1) closing the organic waste gas inlet 2 and the organic waste gas outlet 3, starting the PTC electric heating system to heat the catalyst, and controlling the temperature of the catalyst to be 140 ℃;
(2) starting the fan 9, wherein the fan 9 generates hot air flow by sweeping the PTC electric heating plate 6, and the hot air flow circularly sweeps the oil fume adsorbed on the adsorption module to enter the metal honeycomb 5 loaded with the catalyst to decompose the oil fume into carbon dioxide and water;
(3) the organic waste gas outlet detection device 7 detects the outlet concentration of the organic waste gas, and the outlet concentration of the organic waste gas is less than or equal to 10mg/m3When the waste gas is exhausted, the organic waste gas outlet 3 is opened to discharge the waste gas;
the standard for the transition from the adsorption phase to the catalytic decomposition phase is: the adsorption breakthrough of the adsorption module is saturated.
When the oil fume adsorption and catalytic purification device provided by the application example is adopted to treat oil fume, when the temperature of the catalyst is 140 ℃, the purification efficiency of organic waste gas in the range hood is 77%. Compared with the application example 4, in the oil fume adsorption catalytic purification device provided in the embodiment 4, in the catalytic stage, when the hot air flow sweeps the oil fume, the hot air flow flows between the mesh plate and the gap between the adsorption catalytic outer shell, and the purification efficiency is reduced by 16%.
Comparative application example 1
The comparative application example adopts the oil fume adsorption and purification device as provided in the comparative example 1, and the comparative application example uses the oil fume adsorption and purification device provided in the comparative example 1 for purifying organic waste gas in oil fume discharged by a household range hood. The purification process comprises an adsorption stage.
The adsorption phase comprises the following steps: the pipe covers of the organic waste gas inlet pipeline and the organic waste gas outlet pipeline are respectively opened, oil fume enters the inside of the adsorption catalysis shell body 1 through the organic waste gas inlet 2, and is exhausted through the organic waste gas outlet 3 after being adsorbed by the adsorption module.
Compared with the application example 4, the oil fume adsorption and purification device provided in the comparative example 1 can only adsorb oil fume, and after the adsorption module is adsorbed and saturated, the adsorption module can not play a role in purifying oil fume, and the adsorption module can not be used for in-situ heating desorption regeneration, so that the oil fume can be continuously purified only by being replaced immediately.
Comparative application example 2
The comparative application example adopts the oil fume catalytic purification device as provided in the comparative example 2, and the comparative application example uses the oil fume catalytic purification device as provided in the comparative example 2 for purifying organic waste gas in oil fume discharged by a household range hood. The purification process comprises a catalytic stage.
The catalytic stage comprises the following steps:
(1) closing the organic waste gas inlet 2 and the organic waste gas outlet 3, starting the PTC electric heating system to heat the catalyst, and controlling the temperature of the catalyst to be 140 ℃;
(2) starting a fan 9, wherein the fan 9 generates hot air flow by sweeping the PTC electric heating plate 6, and the hot air flow circularly sweeps and adsorbs the oil fume in the catalysis outer shell 1 to enter the metal honeycomb 5 loaded with the catalyst, so that the oil fume is decomposed into carbon dioxide and water;
(3) the organic waste gas outlet detection device 7 detects the outlet concentration of the organic waste gas, and the outlet concentration of the organic waste gas is less than or equal to 10mg/m3When the organic waste gas outlet 3 is opened, the waste gas is discharged.
Compared with the application example 4, the oil fume catalytic purification device provided by the comparative example 2 needs to continuously keep the heating state of the catalytic module, so that the energy consumption is improved, in addition, the inlet and the outlet of the organic waste gas are in the closing state in the heating process, and in the process, the organic waste gas can not enter the oil fume catalytic purification device provided by the comparative example 2 through the inlet 2 of the organic waste gas. If in the catalytic purification process, oil fume gets into through organic waste gas import 2 oil fume catalytic purification device always, through organic waste gas export 3 evacuation, the catalytic temperature of catalyst can't be reached to the PTC heating system in the catalytic purification device, and purification efficiency is less than 10%.
In conclusion, the oil fume adsorption and catalytic purification device provided by the utility model has a simple structure, and can realize efficient decomposition and purification of organic waste gas in oil fume; the volume is small, and the device can be suitable for purifying organic waste gas in oil smoke discharged by a household range hood and a commercial small range hood; when the temperature of the catalyst is 140 ℃, the purification efficiency of the organic waste gas in the range hood can reach more than 90%.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The oil fume adsorption and catalytic purification device is characterized by comprising an organic waste gas inlet, an adsorption and catalytic outer shell and an organic waste gas outlet according to the flowing direction of oil fume;
the adsorption catalysis outer shell comprises an adsorption module and a catalysis module;
the adsorption module comprises at least 2 adsorbent-filled mesh sheets;
the catalytic module comprises a metal honeycomb loaded with a catalyst, a PTC heating system and a fan;
the PTC heating system is used for controlling the catalytic temperature of the catalyst;
the fan is used for realizing the circulation of hot air flow inside the adsorption and catalysis outer shell and sweeping the oil fume adsorbed on the adsorption template.
2. The oil fume adsorption and catalytic purification device according to claim 1, wherein the bottom ends of the at least 2 mesh plates are respectively and independently obliquely erected inside the adsorption and catalytic outer shell, and the top parts of the mesh plates are closed;
the top of the at least 2 screen plates is closed at the central position of the organic waste gas outlet.
3. The oil fume adsorption and catalytic purification device according to claim 2, wherein the catalytic module is arranged in an area enclosed by 2 mesh plates and the bottom of the adsorption and catalytic outer shell;
the PTC heating system is arranged between the fan and the metal honeycomb loaded with the catalyst.
4. The oil fume adsorption catalytic purification device according to claim 2, wherein the equivalent diameter of the mesh plate is 0.02-2 cm;
the length of the screen plate is 25-30 cm;
the thickness of the mesh plate is 1-10 cm;
the width of the mesh plate is the same as that of the adsorption and catalysis outer shell.
5. The adsorption catalytic purification device of claim 1, wherein the metal honeycomb is made of a FeCrAl alloy;
the specific surface area of the metal honeycomb is 25-40m2/cm3；
The mesh number of the metal honeycomb is 200-600 meshes;
the length of the metal honeycomb is 10-20 cm;
the diameter of the metal honeycomb is 4-10 cm.
6. The adsorption catalytic purification apparatus according to claim 1, wherein the PTC heating system comprises a PTC heating plate and a catalyst temperature detection controller;
the length of the PTC heating plate is 10-15 cm;
the ratio of the width to the length of the PTC heating plate is (0.8-1) 1;
the thickness of the PTC heating plate is 18-30 mm.
7. The adsorption catalytic purification apparatus according to claim 1, wherein the organic exhaust gas inlet has a diameter of 6-8 cm;
the organic waste gas inlet is connected with an organic waste gas inlet pipeline;
the organic waste gas inlet pipeline is provided with a pipe cover;
the length of the organic waste gas inlet pipeline is 8-15 cm.
8. The adsorption catalytic purification apparatus according to claim 1, wherein the organic exhaust gas outlet has a diameter of 6-8 cm;
the organic waste gas outlet is connected with an organic waste gas outlet pipeline;
the organic waste gas outlet pipeline is provided with a pipe cover;
the length of the organic waste gas outlet pipeline is 8-15 cm.
9. The adsorption catalytic purification apparatus according to claim 8, wherein the organic exhaust gas outlet conduit is further provided with an organic exhaust gas outlet concentration detector.
10. The adsorptive catalytic purification apparatus according to claim 1, wherein the adsorptive catalytic outer shell has a length of 25-35 cm;
the ratio of the width, the length and the height of the adsorption catalysis outer shell is (0.6-1) to 1 (0.7-1).
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| CN202120989103.0U CN215692953U (en) | 2021-05-10 | 2021-05-10 | Oil fume adsorption catalytic purification device |
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