CN212383490U

CN212383490U - Dust removal catalysis coupling tube subassembly reaches dust removal catalysis coupling device including it

Info

Publication number: CN212383490U
Application number: CN202020202017.6U
Authority: CN
Inventors: 陈运法; 刘海弟; 李伟曼
Original assignee: Institute of Process Engineering of CAS
Current assignee: Institute of Process Engineering of CAS
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2021-01-22
Anticipated expiration: 2030-02-24

Abstract

The utility model provides a dust removal catalysis coupling pipe subassembly reaches including its dust removal catalysis coupling device, dust removal catalysis coupling pipe subassembly include that the ceramic pipe and the axial that the bottom sealed set up in the inside wire net pipe of ceramic pipe, ceramic pipe and wire net pipe between the column annulus in fill and have the catalyst granule. The utility model provides a dust removal catalysis coupling device utilizes current catalyst granule and simple cylindrical wire mesh pipe internals to successfully realize the coupling of catalytic function in ceramic pipe inside, simultaneously because the pressure drop on pellet form granule catalyst layer is very little, can not show the influence to the blowback regeneration production of ceramic pipe, can successfully realize the coupling of catalysis and dust removal.

Description

Dust removal catalysis coupling tube subassembly reaches dust removal catalysis coupling device including it

Technical Field

The utility model belongs to the technical field of exhaust-gas treatment, a dirty exhaust-gas treatment subassembly reaches processing apparatus including it is related to, especially relate to a dust removal catalysis coupling pipe subassembly and including its dust removal catalysis coupling device.

Background

The high-efficiency dust removal is an unusual basic industrial operation in many industrial fields such as metallurgy, energy, chemical industry, waste incineration and the like, and the electric dust removal, the cloth bag dust removal and the electric bag composite dust removal are common technical schemes of large-scale industrial dust removal at present. The electric dust removal is to capture charged dust on a dust collection polar plate by utilizing the action of an electric field force, the technical scheme has the advantages of low pressure drop, low power consumption and capability of removing dust at high temperature, however, the technical scheme has low efficiency in removing particles with particle diameters of PM2.5 or even lower, and the reason is that when the particle diameters of the dust are less than 2 microns, the charge mechanism of the dust is converted to diffusion charge, so that the particles loaded with reversed charges are increased, and the dust removal efficiency is reduced. The bag-type dust collection is a technical scheme of filtering and collecting dust by using a bagged fiber fabric, has high filtering precision and good effect of capturing PM2.5 and even finer particles, but because the fiber fabric is difficult to bear high temperature (lower than 250-280 ℃), the bag-type dust collection has to be cooled firstly and then can be completed when being used for high-temperature flue gas, so that the bag-type dust collection has the risk of bag pasting when the flue gas contains easily-condensable components, and in addition, when smoldering particles (such as hot coal ash, coke and the like) are contained in the flue gas, bag burning accidents often occur, so the bag-type dust collection is difficult to deal with dust collection occasions with high flue gas temperature or complicated flue gas components. The electric-bag composite dust removal combines the advantages of electric dust removal and bag dust removal, has the advantages of stable operation, high dust removal efficiency and the like, but can not be used for collecting dust of high-temperature flue gas due to the temperature resistance limitation of the bag.

The porous inorganic ceramic tube has been greatly improved as a novel dust removal medium at present, the porosity of the current fiber-based ceramic tube can reach 70 percent, the dead weight is less than 1g/mL, the no-load pressure drop is only 100-200 Pa, the breaking strength is more than 8MPa, the temperature resistance is as high as 600 ℃, the filtration precision is extremely high, and the concentration of outlet dust is less than 5mg/m³. Meanwhile, due to the coupling of the dust charging technology, the problem of pore channel blockage of the ceramic tube in the dust removal process is also solved.

CN103961962A discloses a dust-containing gas purification device compounded by static electricity and an inorganic porous ceramic tube, which comprises a dust-containing gas inlet, a high-voltage electrostatic charge module, a dust removal box, a clean gas box, a porous SiC ceramic filter tube, an electrode guide frame, a dust collection bin, a high-pressure air back flushing port and a clean gas outlet; a dust-containing gas inlet is arranged at an inlet of the equipment, dust-containing gas flow is introduced into the high-voltage electrostatic charge module, particles in the dust-containing gas flow are loaded with the same charges as a corona electrode in the high-voltage electrostatic charge module, then the dust-containing gas flow enters the dust removal box, a porous SiC ceramic filter tube is arranged in the dust removal box, the porous SiC ceramic filter tube is connected with the corona electrode in the high-voltage electrostatic charge module through an electrode guide frame, the particles in the dust-containing gas flow reside on the surface of the porous SiC ceramic filter tube due to strong electrostatic repulsion force of the porous SiC ceramic filter tube to form a loose powder cake layer, gas passes through micro-pores on the wall of the porous SiC ceramic filter tube and enters the clean gas box from the inside of the porous SiC ceramic filter tube, the clean gas box is arranged at the upper part of the dust removal box, the clean gas box is separated from the dust removal box by a flower plate, and the flower plate fixes a tube bundle, an insulating sealing ring is padded between the pattern plate and the porous SiC ceramic filter tube bundle, a clean air flow outlet is arranged on the side surface of the clean air box, a high-pressure air back-blowing port is also arranged on one side of the clean air box and used for back-blowing regeneration of the porous SiC ceramic filter tube bundle, and dust collection bins are arranged at the lower parts of the high-pressure electrostatic charge module and the dust removal box and used for collecting dust particles collected by the high-pressure electrostatic charge module and the porous SiC ceramic tube.

CN105327578A discloses a method for purifying dust-containing gas, the device adopts a pre-charging device to charge the dust in the air flow, and then the charged dust-containing gas is introduced into a dust removing box, a plurality of groups of conductive porous ceramic filter tubes are arranged in the dust removing box, the conductive porous ceramic filter tubes are connected with each other, high voltage with the same electrical property as the electrical property of the dust is loaded on the conductive porous ceramic filter tubes, the conductive property of the conductive porous ceramic tubes is realized by coating a porous ceramic coating containing a conductive medium, gas sealing and electrical insulation are realized between the conductive porous ceramic tubes and a pattern plate through an insulating sealing gasket, the charged dust in the gas can not enter the fine pore channels on the wall surface of the conductive porous ceramic filter tubes, and dust removal is easy. The pre-charging device at the front end works at a high voltage to realize the sufficient charging of dust, and the conductive porous ceramic filter pipe at the rear end is easy to realize the electrical insulation among the conductive porous ceramic filter pipe, the equipment card and the outer cylinder body through another power supply with a low voltage.

Therefore, the ceramic tube dust removal becomes an important technical scheme in the field of high-temperature deep dust removal at present, however, with the improvement of the current environmental protection consciousness and the continuous reduction of the exhaust emission limit value in China, dust and NO are generated_xAnd various pollutants such as VOCs and the like face increasingly severe emission requirements, and the original technical scheme for respectively treating each pollutant has shown over-high initial investment and low operation efficiency, so that the technical scheme for simultaneously removing two or even more pollutants is urgently needed in the field of industrial tail gas treatment, for example, a biomass boiler is often required to simultaneously remove VOCs and PM, and a coal-fired boiler, waste incineration, cement and glass flue gas are often required to simultaneously remove NO_xAnd PM.

In the aspects, a plurality of technical schemes have appeared at home and abroad, Taiwan Fulikang company mixes and pulps ceramic fiber and SCR catalyst, then carries out vacuum pumping and forming, and then utilizes steam curing to obtain the ceramic tube with the functions of dust removal and denitration. The danish tobuo company prepares a catalyst layer by using a special device in the ceramic tube, so that the separation of catalyst components and dust particles is realized, and the dust removal and denitration integrated ceramic tube with good performance is also obtained.

In addition, catalyst particles are dispersed in a liquid phase for pulping, and then the ceramic tube is soaked in the slurry to enable the catalyst particles to be loaded in pore channels of the tube wall of the ceramic tube, so that the feasible method for manufacturing the ceramic tube with catalyst performance is also provided, but researches show that the pore channels of the ceramic tube are tortuous interparticle pores, so that the catalyst particles have extremely high permeation resistance in the pore channels, are often gathered in the range of 1-2 mm on the surface of the ceramic tube, and cause huge gas resistance under the condition of small catalyst loading capacity, thereby not only greatly losing the air permeability of the porous ceramic tube, but also being incapable of tolerating higher air flow airspeed due to the lower catalyst loading capacity.

Therefore, how to obtain a ceramic tube material with catalytic performance by using a simple method and further obtain a dust removal/catalysis integrated ceramic tube medium has urgent technical requirements.

SUMMERY OF THE UTILITY MODEL

The utility model provides a be not enough to prior art existence, the utility model aims at providing a dust removal catalysis coupling pipe subassembly reaches including its dust removal catalysis coupling device, the utility model provides a dust removal catalysis coupling device utilizes current catalyst granule and simple cylindrical wire mesh pipe inner member to successfully realize the coupling of catalysis function in ceramic pipe inside, simultaneously because the pressure drop on pellet form particle catalyst layer is very little, can not show the influence to the blowback regeneration production of ceramic pipe, can successfully realize the coupling of catalysis and dust removal.

To achieve the purpose, the utility model adopts the following technical proposal:

in a first aspect, the utility model provides a dust removal catalysis coupling pipe subassembly, dust removal catalysis coupling pipe subassembly include that the ceramic pipe and the axial that the bottom sealed set up in the inside wire mesh pipe of ceramic pipe, ceramic pipe and wire mesh pipe between the column annular gap in fill and have the catalyst granule.

The utility model provides a dust removal catalysis coupling device utilizes current catalyst granule and simple cylindrical wire mesh pipe internals to successfully realize the coupling of catalytic function in ceramic pipe inside, simultaneously because the pressure drop on pellet form granule catalyst layer is very little, can not show the influence to the blowback regeneration production of ceramic pipe, can successfully realize the coupling of catalysis and dust removal. Furthermore, the utility model provides a dust removal catalysis coupling device has also effectively realized the alternate segregation between ceramic pipe and the catalyst granule, and this has important meaning to the recovery and the processing of catalyst, and SCR catalyst has been listed as the danger by the country at present and useless, and this technical scheme can pour out after the catalyst deactivation and carry out recovery processing as the danger is useless, and the ceramic pipe then can continue to use or handle as ordinary solid useless.

As an optimized technical proposal of the utility model, the bottom of the metal wire mesh tube is sealed.

The metal wire mesh pipe and the ceramic pipe are coaxially arranged.

The ceramic pipe comprises a pipe body, and a ceramic pipe flange is arranged at one end of the pipe body.

And one end of the dedusting catalytic coupling pipe assembly close to the ceramic pipe flange is provided with a sealing element, and the sealing element is used for plugging the opening of the columnar annular gap to prevent the leakage of catalyst particles filled in the columnar annular gap.

As an optimal technical scheme, the sealing member include the nozzle stub and be located the circumference of nozzle stub one end and follow outward, nozzle stub pipe diameter and wire mesh pipe diameter cooperate, thereby the nozzle stub inserts the opening of the ceramic pipe flange shutoff column annulus is hugged closely to the circumference epitaxy that its one end set up behind the wire mesh pipe.

It should be noted that the utility model provides a sealing member mainly used shutoff column annular gap's opening prevents that the catalyst granule of the intussuseption of annular gap intussuseption from revealing in the use, therefore even if the utility model discloses further limited the concrete structure of sealing member, and including nozzle stub and circumference outer edge, nevertheless also can understand, other arbitrary structural seal spare that can realize shutoff annular gap open-ended all can be used in the utility model discloses in, exemplary such as conventional sealing member such as annular rubber ring, piston.

In addition, it should be further explained that the present invention only limits the structural features of the dust-removing catalytic coupling pipe assembly, and the assembling method of the dust-removing catalytic coupling pipe assembly is not particularly limited, but can be known based on the conventional reasoning, and the dust-removing catalytic coupling pipe assembly defined by the present invention needs to be assembled through the following steps:

(1) inserting a cylindrical wire mesh tube with a diameter smaller than the inner diameter of the ceramic tube into the ceramic tube;

(2) catalyst particles are filled into a columnar annular space formed between the ceramic tube and the metal wire mesh tube, and the particle size of the filled catalyst particles is larger than or equal to that of the wire mesh holes of the metal wire mesh tube, so that the catalyst particles are prevented from entering the interior of the metal wire mesh tube through meshes;

(3) when the throat of the ceramic pipe is filled, a short pipe with an outer edge is arranged at the opening of the ceramic pipe, the short pipe is pressed downwards, the outer edge of the short pipe is attached to the upper surface of the flange of the ceramic pipe, and therefore the opening of the columnar annular gap is blocked.

Of course, the above-mentioned manufacturing method is not the limitation of the claims of the present invention, and therefore, it should be understood that other dust-removing catalytic coupling devices similar to the structure of the dust-removing catalytic coupling tube assembly as claimed in the present invention, which are manufactured by the above-mentioned exemplary conventional manufacturing method or other non-conventional manufacturing method which is not easy to be exemplified, also fall within the protection scope and disclosure of the present invention.

In a preferred embodiment of the present invention, the inner diameter of the ceramic tube is 2 to 25cm, and may be, for example, 2cm, 4cm, 6cm, 8cm, 10cm, 12cm, 14cm, 16cm, 18cm, 20cm, 22cm or 24cm, but is not limited to the above-mentioned values, and other values not mentioned in the above-mentioned range of values are also applicable.

The outer diameter of the ceramic tube is 5 to 30cm, and may be, for example, 5cm, 7cm, 9cm, 11cm, 13cm, 15cm, 17cm, 19cm, 21cm, 23cm, 25cm, 27cm or 29cm, but is not limited to the above-mentioned values, and other values not mentioned in the above-mentioned range are also applicable.

The thickness of the ceramic tube is 2 to 5cm, for example, 2cm, 2.5cm, 3cm, 3.5cm, 4cm, 4.5cm or 5cm, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.

The diameter of the wire mesh tube is 3-20 cm, for example, 3cm, 5cm, 7cm, 9cm, 11cm, 13cm, 15cm, 17cm or 19cm, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.

The width of the columnar annular space formed between the ceramic tube and the metal wire mesh tube is 1-3 cm, for example, 1.0cm, 1.2cm, 1.4cm, 1.6cm, 1.8cm, 2.0cm, 2.2cm, 2.4cm, 2.6cm, 2.8cm or 3.0cm, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.

The length of the ceramic tube is more than or equal to that of the metal wire mesh tube.

The length of the ceramic tube is 150 to 250cm, for example, 150cm, 160cm, 170cm, 180cm, 190cm, 200cm, 210cm, 220cm, 230cm, 240cm or 250cm, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable.

The length of the wire mesh tube is 160-200 cm, for example, 160cm, 165cm, 170cm, 175cm, 180cm, 185cm, 190cm, 195cm or 200cm, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.

In a preferred embodiment of the present invention, the porosity of the ceramic tube is 60 to 80%, and may be, for example, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79% or 80%, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned numerical range are also applicable.

The diameter of the ceramic tube is 10 to 25 μm, for example, 10 μm, 11m, 12m, 13m, 14m, 15m, 16m, 17m, 18m, 19m, 20m, 21m, 22m, 23m, 24m or 25m, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.

The apparent density of the ceramic tube is 0.8 to 1.0g/mL, and may be, for example, 0.8g/mL, 0.81g/mL, 0.82g/mL, 0.83g/mL, 0.84g/mL, 0.85g/mL, 0.86g/mL, 0.87g/mL, 0.88g/mL, 0.89g/mL, 0.90g/mL, 0.91g/mL, 0.92g/mL, 0.93g/mL, 0.94g/mL, 0.95g/mL, 0.96g/mL, 0.97g/mL, 0.098g/mL, 0.99g/mL, or 1.0g/mL, but is not limited to the recited values, and other values not recited in the recited values are also applicable.

As an optimized technical proposal of the utility model, the mesh size of the metal wire mesh tube is less than or equal to the particle size of the catalyst particles.

The mesh size of the wire mesh tube is 0.1-3 mm, for example, 0.1cm, 0.5cm, 1.0cm, 1.5cm, 2.0cm, 2.5cm or 3.0cm, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.

The catalyst particles have a particle size of 0.5 to 5mm, and may be, for example, 0.5cm, 1cm, 1.5cm, 2cm, 2.5cm, 3cm, 3.5cm, 4cm, 4.5cm or 5cm, but are not limited to the values listed, and other values not listed in the range of the values are also applicable.

The utility model discloses in, the material of ceramic pipe can be selected for any one in cordierite, mullite, SiC or ceramic fibre, and the material of wire net pipe can be selected for any one in stainless steel, aluminum alloy, aluminium, copper or the iron. The catalyst particles comprise a catalyst carrier and active components loaded on the surface of the catalyst carrier, wherein the mass of the active components accounts for 5-10 wt% of the mass of the catalyst particles, and the active components are low-temperature SCR catalysts or VOCs degradation catalysts. The low-temperature SCR catalyst contains one or the combination of at least two of copper element, iron element or manganese element. The low-temperature SCR catalyst can also be selected from V-W-TiO₂A type SCR catalyst. The VOCs degradation catalyst is a Mn/Ce composite type or Co/Ce composite type VOCs degradation catalyst. The VOCs degrading catalyst can also be selected from LaMnO₃A VOCs degradation catalyst. The catalyst particles employ a catalyst support having a spherical structure. The material of the catalyst carrier can be selected from active alumina, SiC and porous SiO₂One or a combination of at least two of ceramic fiber, cordierite, mullite, sepiolite or diatomite. The porosity of the catalyst carrier is 60-80%, and the apparent density of single pellets of the catalyst carrier is 0.4-1.5 g/mL.

Adopt the utility model provides a dust removal catalysis coupling device handles dusty waste gas, processing method include:

dust-containing waste gas at 300-400 ℃ passes through the wall of the ceramic tube from the outside of the ceramic tube at a flow speed of 0.5-1.5 m/min to remove dust, and then passes through catalyst particles to form catalystThe catalyst layer completes catalysis, the gas is discharged from the top of the metal wire mesh pipe, and the concentration of dust in the purified gas discharged from the top of the metal wire mesh pipe is 5-6 mg/m³。

In a second aspect, the present invention provides a dust removal catalytic coupling device, comprising a card and at least one dust removal catalytic coupling tube assembly as described in the first aspect; one end of the dust removal catalysis coupling pipe assembly is fixedly connected with the pattern plate.

As an optimal technical scheme, the diameter of ceramic pipe flange be greater than the through-hole aperture of seting up on the card, make dust removal catalysis coupling pipe subassembly hang in the card below through putting up ceramic pipe flange on the through-hole.

And a first sealing gasket is arranged between the ceramic pipe flange and the pattern plate.

The first sealing gasket is an annular fiber gasket.

As an optimal technical scheme of the utility model, dust removal catalysis coupling device still including the fixed subassembly that is located the card top, fixed subassembly be used for compressing tightly the upper surface at the card with ceramic pipe flange subsides in fact for dust removal catalysis coupling tube subassembly realizes fixed connection with the card.

As an optimal technical scheme of the utility model, fixed subassembly include gland, bolt and nut, the gland is located ceramic pipe flange top, screws up the nut and compresses tightly between with gland, ceramic pipe flange and card three and seal.

And a second sealing gasket is arranged between the gland and the ceramic pipe flange.

The second sealing gasket is an annular fiber gasket.

It should be noted that the utility model provides a concrete spare part that contains in the fixed subassembly to limited the assembly relation between each spare part, but should understand, the utility model discloses do not do special requirement and specifically inject to concrete part, fixed mode and assembly relation class structural characteristic that the fixed subassembly contained, the utility model discloses a main utility model point also is not here, can realize the utility model discloses the fixed subassembly that has disclosed or has not yet disclosed at present among the arbitrary prior art of the fixed sealed effect that the requirement reaches all can be used to the utility model discloses in. Therefore, although the utility model discloses it is still further limited to adopt the seal assembly including top gland, bolt and nut to carry out fixed seal between dust removal catalysis coupling pipe subassembly and the card, nevertheless not right the utility model discloses the technical scheme who claims requires protection constitutes fundamental limitation, and gland and seal gasket can also be that many ceramic tubes a set of compresses tightly simultaneously and seal, and any reasonable compresses tightly does not influence with sealed form the utility model discloses technical scheme's realization.

The system refers to an equipment system, or a production equipment.

Compared with the prior art, the beneficial effects of the utility model are that:

Drawings

Fig. 1 is a schematic view of an overall structure of a dust removal catalytic coupling device according to an embodiment of the present invention;

fig. 2 is an exploded view of a dust removal catalytic coupling device according to an embodiment of the present invention.

Wherein, 1-ceramic tube; 2-wire mesh tube; 3-catalyst particles; 4-pattern plate; 5-ceramic pipe flange; 6-pressing the cover; 7-a nut; 8-a first sealing gasket; 9-a second sealing gasket; 10-sealing element.

Detailed Description

It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly, and may for example be 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 solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

In a specific embodiment, the utility model provides a dust removal catalysis coupling tube subassembly, dust removal catalysis coupling tube subassembly as shown in fig. 1 and fig. 2, set up in the inside wire net pipe 2 of ceramic pipe 1 including ceramic pipe 1 and axial, ceramic pipe 1 and the coaxial setting of wire net pipe 2, it has catalyst granule 3 to fill in the column annular gap between ceramic pipe 1 and the wire net pipe 2.

The ceramic tube 1 comprises a tube body, a ceramic tube flange 5 is arranged at one end of the tube body, a sealing element 10 is arranged at one end of the dust removal catalytic coupling tube assembly close to the ceramic tube flange 5, and the sealing element 10 is used for plugging an opening of a columnar annular gap to prevent leakage of catalyst particles 3 filled in the sealing element. Specifically, the sealing element 10 comprises a short pipe and a circumferential outer edge positioned at one end of the short pipe, the diameter of the short pipe is matched with the diameter of the metal wire mesh pipe 2, and the circumferential extension arranged at one end of the short pipe after the short pipe is inserted into the metal wire mesh pipe 2 is tightly attached to the ceramic pipe flange 5 so as to plug the opening of the columnar annular gap.

The size parameters of the ceramic tube 1, the metal wire mesh tube 2 and the catalyst particles 3 can be selected as follows: the inner diameter of the ceramic tube 1 is 2-25 cm, the outer diameter is 5-30 cm, and the thickness is 2-5 cm; the diameter of the metal wire mesh pipe 2 is 3-20 cm, and the width of a columnar annular gap formed between the ceramic pipe 1 and the metal wire mesh pipe 2 is 1-3 cm. The length of the ceramic tube 1 is greater than or equal to that of the metal wire mesh tube 2, further, the length of the ceramic tube 1 is 150-250 cm, and the length of the metal wire mesh tube 2 is 160-200 cm. The porosity of the ceramic tube 1 is 60-80%, the pore diameter of the ceramic tube 1 is 10-25 μm, and the apparent density of the ceramic tube 1 is 0.8-1.0 g/mL. The mesh size of the metal wire mesh pipe 2 is smaller than or equal to the particle size of the catalyst particles 3, further, the mesh size of the metal wire mesh pipe 2 is 0.1-3 mm, and the particle size of the catalyst particles 3 is 0.5-5 mm.

The ceramic tube 1 can be made of any one of cordierite, mullite, SiC or ceramic fiber, and the wire mesh tube 2 can be made of any one of stainless steel, aluminum alloy, aluminum, copper or iron.

The catalyst particles 3 comprise catalyst carriers and active components loaded on the surfaces of the catalyst carriers, the mass of the active components accounts for 5-10 wt% of the mass of the catalyst particles 3, and the active components comprise low-temperature SCR catalysts or VOCs degradation catalysts. Wherein the low-temperature SCR catalyst contains one or the combination of at least two of copper element, iron element or manganese element, and the low-temperature SCR catalyst can be selected from V-W-TiO₂A type SCR catalyst. The VOCs degrading catalyst is Mn/Ce composite or Co/Ce composite VOCs degrading catalyst, and VOCs is reducedThe catalyst can be selected from LaMnO₃A VOCs degradation catalyst. The catalyst carrier is spherical structure, and the material can be selected from active alumina, SiC and porous SiO₂Any one of ceramic fiber, cordierite, mullite, sepiolite or diatomite; the porosity of the catalyst carrier is 60-80%, and the apparent density of single pellets of the catalyst carrier is 0.4-1.5 g/mL.

The dust removal catalytic coupling pipe assembly provided by the above specific embodiment is used for treating dust-containing waste gas, and the treatment method specifically comprises the following steps:

dust-containing waste gas at 300-400 ℃ passes through the pipe wall of the ceramic pipe 1 from the outside of the ceramic pipe 1 at the flow speed of 0.5-1.5 m/min to realize dust removal, then passes through a catalyst layer formed by catalyst particles 3 to complete catalysis, is discharged from the top of the metal wire mesh pipe 2, and the dust concentration in the discharged purified gas is 5-6 mg/m³。

In another embodiment, the present invention provides a dust removal catalytic coupling device, which comprises a faceplate 4 and at least one dust removal catalytic coupling tube assembly as shown in fig. 1, wherein one end of the dust removal catalytic coupling tube assembly is fixedly connected to the faceplate 4.

The diameter of the ceramic pipe flange 5 is larger than the aperture of the through hole formed in the pattern plate 4, the dedusting catalytic coupling pipe assembly is hung below the pattern plate 4 by erecting the ceramic pipe flange 5 on the through hole, a first sealing gasket 8 is arranged between the ceramic pipe flange 5 and the pattern plate 4, and optionally, the first sealing gasket 8 is an annular fiber gasket.

The dust removal catalysis coupling device further comprises a fixing component located above the flower plate 4, and the ceramic pipe flange 5 is tightly attached to the upper surface of the flower plate 4 through the fixing component, so that the dust removal catalysis coupling pipe component and the flower plate 4 are fixedly connected. Specifically, the fixing assembly comprises a gland 6, a bolt and a nut 7, the gland 6 is positioned above the ceramic pipe flange 5, and the gland 6, the ceramic pipe flange 5 and the flower plate 4 are compressed and sealed by tightening the nut 7. A second sealing gasket 9 is arranged between the gland 6 and the ceramic pipe flange 5, and optionally, the second sealing gasket 9 is an annular fiber gasket.

Example 1

The embodiment provides a dust removal catalysis coupling pipe assembly, which is shown in fig. 1 and 2 and comprises a ceramic pipe 1 and a metal wire mesh pipe 2 axially arranged inside the ceramic pipe 1, wherein the bottom of the metal wire mesh pipe 2 is sealed and coaxially arranged with the ceramic pipe 1, and a columnar annular gap between the ceramic pipe 1 and the metal wire mesh pipe 2 is filled with catalyst particles 3.

The ceramic pipe 1 comprises a pipe body, a ceramic pipe flange 5 is arranged at one end of the pipe body, a sealing element 10 is arranged at one end, close to the ceramic pipe flange 5, of the dust removal catalytic coupling pipe assembly, the sealing element 10 comprises a short pipe and a circumferential outer edge located at one end of the short pipe, the diameter of the short pipe is matched with the diameter of the metal wire mesh pipe 2, and the circumferential outer edge arranged at one end of the short pipe is inserted into the metal wire mesh pipe 2 and clings to the ceramic pipe flange 5 so as to seal an opening.

The dimensional parameters of the ceramic tube 1, the metal wire mesh tube 2 and the catalyst particles 3 specifically include: the inner diameter of the ceramic tube 1 is 2cm, the outer diameter is 5cm, the thickness is 1.5cm, the length is 150cm, the porosity of the ceramic tube 1 is 60%, the pore diameter of the ceramic tube 1 is 10 μm, and the apparent density of the ceramic tube 1 is 0.8 g/mL. The wire mesh tube 2 has a diameter of 3cm and a length of 160 cm. The width of the columnar annular gap formed between the ceramic tube 1 and the metal wire mesh tube 2 is 1 cm. The mesh size of the wire mesh tube 2 is 0.1mm, and the particle size of the catalyst particles 3 is 0.5 mm.

The ceramic tube 1 is made of cordierite fibers, and the metal wire mesh tube 2 is made of 316L stainless steel.

The catalyst particles 3 comprise a catalyst carrier and an active component supported on the surface of the catalyst carrier, and the mass of the active component accounts for 5 wt% of the mass of the catalyst particles 3. The active component is V-W-TiO₂Type SCR catalyst, WO₃Content 5 wt%, V₂O₅The content is 1 wt%. The catalyst carrier is active alumina globule. The porosity of the catalyst support was 60% and the individual pellets of the catalyst support had an apparent density of 0.4 g/mL.

The dust-removing catalytic coupling pipe assembly is adopted to treat dust-containing waste gas, and the treatment method specifically comprises the following steps:

dust at 300 DEG CThe waste gas passes through the pipe wall of the ceramic pipe 1 from the outside of the ceramic pipe 1 at the flow velocity of 0.5m/min to realize dust removal, then passes through a catalyst layer formed by catalyst particles 3 to complete catalysis, and is discharged from the top of the metal wire mesh pipe 2, and the dust concentration in the discharged purified gas is 5mg/m³For 400mg/m³NO of_xAnd 95% denitration efficiency is realized.

The embodiment further provides a dust removal catalytic coupling device, which comprises a flower plate 4 and at least one dust removal catalytic coupling tube assembly according to the above embodiment as shown in fig. 1, wherein one end of the dust removal catalytic coupling tube assembly is fixedly connected with the flower plate 4.

The diameter of ceramic pipe flange 5 is greater than the through-hole aperture of seting up on the card 4, makes dust removal catalysis coupling tube subassembly hang in card 4 below through building ceramic pipe flange 5 on the through-hole, is provided with first seal gasket 8 between ceramic pipe flange 5 and the card 4, and first seal gasket 8 is annular fibre gasket.

The dust removal catalysis coupling device also comprises a fixing component positioned above the flower plate 4, the fixing component comprises a gland 6, a bolt and a nut 7, the gland 6 is positioned above the ceramic pipe flange 5, and the gland 6, the ceramic pipe flange 5 and the flower plate 4 are compressed and sealed by screwing the nut 7. A second sealing gasket 9 is arranged between the gland 6 and the ceramic pipe flange 5, and the second sealing gasket 9 is an annular fiber gasket.

Example 2

The dimensional parameters of the ceramic tube 1, the metal wire mesh tube 2 and the catalyst particles 3 specifically include: the ceramic tube 1 had an inner diameter of 10cm, an outer diameter of 20cm, a thickness of 5cm and a length of 160cm, the porosity of the ceramic tube 1 was 65%, the pore diameter of the ceramic tube 1 was 13 μm, and the apparent density of the ceramic tube 1 was 0.85 g/mL. The wire mesh tube 2 has a diameter of 10cm and a length of 170 cm. The width of the columnar annular gap formed between the ceramic tube 1 and the metal wire mesh tube 2 is 5 cm. The mesh size of the wire mesh tube 2 is 1mm, and the particle size of the catalyst particles 3 is 1.5 mm.

The ceramic tube 1 is made of mullite fiber, and the metal wire mesh tube 2 is made of 304 stainless steel.

The catalyst particles 3 comprise a catalyst carrier and an active component loaded on the surface of the catalyst carrier, the mass of the active component accounts for 6 wt% of the mass of the catalyst particles 3, and the active component is V-W-TiO₂Type SCR catalyst, WO₃Content 3 wt%, V₂O₅The content is 3 wt%. . The catalyst carrier is porous SiO₂And (4) a small ball. The porosity of the catalyst support was 65% and the individual pellets of the catalyst support had an apparent density of 0.9 g/mL.

the 330 ℃ dust-containing waste gas passes through the pipe wall of the ceramic pipe 1 from the outside of the ceramic pipe 1 at the flow speed of 0.7m/min to realize dust removal, then passes through a catalyst layer formed by catalyst particles 3 to complete catalysis, and is discharged from the top of the metal wire mesh pipe 2, and the dust concentration in the discharged purified gas is 3mg/m³For 600mg/m³NO of_x94% denitration efficiency is realized.

Example 3

The dimensional parameters of the ceramic tube 1, the metal wire mesh tube 2 and the catalyst particles 3 specifically include: the inner diameter of the ceramic tube 1 is 14cm, the outer diameter is 20cm, the thickness is 3mm, the length is 200cm, the porosity of the ceramic tube 1 is 70%, the aperture of the ceramic tube 1 is 16 μm, and the apparent density of the ceramic tube 1 is 0.9 g/mL. The wire mesh tube 2 has a diameter of 15cm and a length of 180 cm. The width of the columnar annular gap formed between the ceramic tube 1 and the metal wire mesh tube 2 is 2.5 cm. The mesh size of the wire mesh tube 2 is 2mm, and the particle size of the catalyst particles 3 is 2.5 mm.

The ceramic tube 1 is made of SiC fibers, and the metal wire mesh tube 2 is made of aluminum alloy.

The catalyst particles 3 comprise a catalyst carrier and an active component loaded on the surface of the catalyst carrier, the mass of the active component accounts for 7 wt% of the mass of the catalyst particles 3, and the active component is a Mn/Ce composite VOCs degradation catalyst (the molar ratio of Mn to Ce is 6: 4). The catalyst carrier is cordierite pellets. The porosity of the catalyst support was 70% and the individual pellets of the catalyst support had an apparent density of 1 g/mL.

dust-containing waste gas at 350 ℃ passes through the pipe wall of the ceramic pipe 1 from the outside of the ceramic pipe 1 at the flow speed of 1m/min to realize dust removal, then passes through a catalyst layer formed by catalyst particles 3 to complete catalysis, and is discharged from the top of the metal wire mesh pipe 2, and the dust concentration in the discharged purified gas is 5mg/m³For example, 400mg/m³The xylene of (a) achieves a removal efficiency of 95%.

Example 4

The dimensional parameters of the ceramic tube 1, the metal wire mesh tube 2 and the catalyst particles 3 specifically include: the inner diameter of the ceramic tube 1 is 18cm, the outer diameter is 26cm, the thickness is 4mm, the length is 230cm, the porosity of the ceramic tube 1 is 75%, the aperture of the ceramic tube 1 is 20 μm, and the apparent density of the ceramic tube 1 is 0.95 g/mL. The wire mesh tube 2 has a diameter of 18cm and a length of 190 cm. The width of the columnar annular gap formed between the ceramic tube 1 and the metal wire mesh tube 2 is 4 cm. The mesh size of the wire mesh tube 2 is 2.5mm, and the particle size of the catalyst particles 3 is 3.5 mm.

The ceramic tube 1 is made of ceramic fiber, and the metal wire mesh tube 2 is made of copper.

The catalyst particles 3 comprise a catalyst carrier and an active component loaded on the surface of the catalyst carrier, the mass of the active component accounts for 9 wt% of the mass of the catalyst particles 3, and the active component is LaMnO₃A VOCs degradation catalyst. The catalyst carrier is in a spherical structure, and the material of the catalyst carrier can be selected from mullite spheres. The porosity of the catalyst support was 75% and the individual beads of the catalyst support had an apparent density of 1.2 g/mL.

dust-containing waste gas at 380 ℃ passes through the pipe wall of the ceramic pipe 1 from the outside of the ceramic pipe 1 at the flow speed of 1.2m/min to realize dust removal, then passes through a catalyst layer formed by catalyst particles 3 to complete catalysis, is discharged from the top of the metal wire mesh pipe 2, and the discharged purificationThe dust concentration in the post gas is 6mg/m³For example, 400mg/m³The ethanol of (3) achieves a denitration efficiency of 96%.

Example 5

The dimensional parameters of the ceramic tube 1, the metal wire mesh tube 2 and the catalyst particles 3 specifically include: the inner diameter of the ceramic tube 1 is 25cm, the outer diameter is 30cm, the thickness is 2.5mm, the length is 250cm, the porosity of the ceramic tube 1 is 80%, the pore diameter of the ceramic tube 1 is 25 μm, and the apparent density of the ceramic tube 1 is 1.0 g/mL. The wire mesh tube 2 has a diameter of 20cm and a length of 200 cm. The width of the columnar annular gap formed between the ceramic tube 1 and the metal wire mesh tube 2 is 5 cm. The mesh size of the wire mesh tube 2 is 3mm, and the particle size of the catalyst particles 3 is 5 mm.

The ceramic tube 1 is made of mullite fiber, and the metal wire mesh tube 2 is made of iron.

The catalyst particles 3 comprise a catalyst carrier and an active component loaded on the surface of the catalyst carrier, the mass of the active component accounts for 10 wt% of the mass of the catalyst particles 3, and the active component is a Co/Ce composite VOCs degradation catalyst (the molar ratio of Co to Ce is 7: 3). The catalyst carrier is diatomite pellets. The porosity of the catalyst support was 80% and the individual pellets of the catalyst support had an apparent density of 1.5 g/mL.

dust-containing waste gas at 400 ℃ passes through the pipe wall of the ceramic pipe 1 from the outside of the ceramic pipe 1 at the flow speed of 1.5m/min to realize dust removal, then passes through a catalyst layer formed by catalyst particles 3 to complete catalysis, is discharged from the top of the metal wire mesh pipe 2, and the dust concentration in the discharged purified gas is 6mg/m³For example, 400mg/m³The xylene of (a) achieves a removal efficiency of 96%.

The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.

Claims

1. The dust removal catalysis coupling pipe assembly is characterized by comprising a ceramic pipe with a sealed bottom and a metal wire mesh pipe axially arranged in the ceramic pipe, wherein catalyst particles are filled in a columnar annular gap between the ceramic pipe and the metal wire mesh pipe.

2. The dust extraction catalytic coupling tube assembly of claim 1, wherein said wire mesh tube bottom is sealed;

the metal wire mesh pipe and the ceramic pipe are coaxially arranged;

the ceramic pipe comprises a pipe body, and a ceramic pipe flange is arranged at one end of the pipe body;

3. The assembly of claim 2, wherein the sealing member comprises a short tube and a circumferential outer edge at one end of the short tube, the short tube has a diameter matching the diameter of the wire mesh tube, and the circumferential outer edge at one end of the short tube is tightly attached to the ceramic tube flange after the short tube is inserted into the wire mesh tube so as to seal the opening of the cylindrical annular gap.

4. The dust removal catalytic coupling tube assembly of claim 3, wherein the ceramic tube has an inner diameter of 2-25 cm;

the outer diameter of the ceramic tube is 5-30 cm;

the thickness of the ceramic tube is 2-5 cm;

the diameter of the metal wire mesh pipe is 3-20 cm;

the width of a columnar annular gap formed between the ceramic tube and the metal wire mesh tube is 1-3 cm;

the length of the ceramic tube is more than or equal to that of the metal wire mesh tube;

the length of the ceramic tube is 150-250 cm;

the length of the metal wire mesh pipe is 160-200 cm.

5. The dust removal catalytic coupling tube assembly of claim 4, wherein the ceramic tube has a porosity of 60-80%;

the aperture of the ceramic tube is 10-25 mu m;

the apparent density of the ceramic tube is 0.8-1.0 g/mL.

6. The assembly of claim 5, wherein the wire mesh tube has a mesh size equal to or less than a particle size of the catalyst particles;

the mesh size of the metal wire mesh pipe is 0.1-3 mm;

the particle size of the catalyst particles is 0.5-5 mm.

7. A dust removal catalytic coupling device, wherein the dust removal catalytic coupling device comprises a faceplate and at least one dust removal catalytic coupling tube assembly as set forth in any one of claims 2-6; one end of the dust removal catalysis coupling pipe assembly is fixedly connected with the pattern plate.

8. The dust-removing catalytic coupling device of claim 7, wherein the diameter of the ceramic pipe flange is larger than the diameter of the through hole formed in the faceplate, and the dust-removing catalytic coupling pipe assembly is suspended below the faceplate by mounting the ceramic pipe flange on the through hole;

a first sealing gasket is arranged between the ceramic pipe flange and the pattern plate;

the first sealing gasket is an annular fiber gasket.

9. The coupling device of claim 8, further comprising a fixing component above the faceplate, wherein the fixing component is used for tightly pressing the ceramic pipe flange on the upper surface of the faceplate so that the coupling tube component is fixedly connected with the faceplate.

10. The dust extraction catalytic coupling device of claim 9, wherein the securing assembly comprises a gland, a bolt and a nut, the gland is located above the ceramic tube flange, and tightening the nut compresses and seals the gland, the ceramic tube flange and the faceplate;

a second sealing gasket is arranged between the gland and the ceramic pipe flange;

the second sealing gasket is an annular fiber gasket.