CN106621616B - Gas dust removal device and dust removal method and application thereof - Google Patents
Gas dust removal device and dust removal method and application thereof Download PDFInfo
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- CN106621616B CN106621616B CN201510419155.3A CN201510419155A CN106621616B CN 106621616 B CN106621616 B CN 106621616B CN 201510419155 A CN201510419155 A CN 201510419155A CN 106621616 B CN106621616 B CN 106621616B
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Abstract
The invention provides a gas dust removal device and a dust removal method and application thereof, wherein the device comprises ceramic particles, a plurality of ceramic plate groups and a discharge valve; the device further comprises a vibrating screen, a ceramic particle pushing device, a dust pushing device and a ceramic particle conveying device. The method comprises the following steps that dust-containing airflow passes through ceramic particles filled in gaps among ceramic plate groups for dust removal, the ceramic particles adsorbing dust are discharged onto a vibrating screen, the vibrating screen removes the dust on the ceramic particles through the vibrating screen, the ceramic particles with the dust removed through screening are pushed to a ceramic particle conveying device through a ceramic particle pushing device, then conveyed to the top of a gas dust removal device, and then poured into the gaps among the ceramic plate groups; the dust sieved through the vibrating screen is pushed out of the gas dust removal device by the dust pushing device. The dust removal device adopts ceramic as a main device material, can resist high temperature, has small air resistance and high dust removal efficiency, and is very suitable for treating industrial dust-containing waste gas with the temperature higher than 400 ℃, particularly more than 1000 ℃.
Description
Technical Field
The invention belongs to the field of environmental protection and waste heat recovery, relates to a gas dust removal device and a dust removal method and application thereof, and particularly relates to a high-temperature gas dust removal device and a dust removal method and application thereof.
Background
With the rapid development of economy in China, the energy problem is increasingly prominent. At present, a plurality of high energy consumption industries such as metallurgy, electric power and the like in China start to comprehensively implement energy saving and consumption reduction technical transformation such as waste heat recovery. At the present that energy is increasingly in short supply, waste heat of waste gas at the temperature of about 350 ℃ is worth recovering, and therefore, waste heat recovery is one of important ways for saving energy and reducing consumption in industrial industries in China. However, most of the exhaust gases containing recoverable waste heat contain dust particles, and the existence of the dust has serious damage to the waste heat recovery boiler, especially in the occasions where the dust is high in corrosivity and the temperature of the exhaust gas is high. Therefore, how to remove the dust in the exhaust gas without reducing the temperature of the exhaust gas (in order to ensure the grade of the waste heat) becomes a technical problem which is widely concerned in the field of waste heat recovery at present.
It is known that the operation of dedusting industrial waste gas is an old industrial operation, and the method and the process are very various. For dust with larger particles, the gravity settling chamber and the cyclone separator can effectively remove the dust in the airflow, and the operation mainly utilizes the density difference of the dust and the gas to separate the particles from the airflow through the change of the streamline. However, these techniques are inefficient for particles having a particle size of less than 2 microns because such small particle diameters make it difficult for the particles to settle and separate inertly, and even if separated, they can easily escape through secondary dust. The wet dust removal is also a very mature and common dust removal mode, the technical scheme elutes dust in air flow by methods of a venturi tube, water mist or a water curtain and the like, sometimes, water spraying operation is combined with a baffle type dust remover, the dust removal performance is reliable, but the wet dust removal method cannot be used for dust removal of high-temperature and ultrahigh-temperature waste gas because water is used as a dust removal medium. The fiber bag dust removal is a very common high-efficiency dust removal means at present, particles with the diameter smaller than 1 micron can be effectively removed through gaps among fiber fabrics, and the bag-type dust remover can be regenerated through vibration or back blowing, so that the bag-type dust remover is very suitable for removing tiny dust with the particle diameter smaller than 2 microns in industrial waste gas. However, the bag-type dust collector cannot be used for tail gas with the temperature higher than 300 ℃ because the bag-type dust collector cannot resist high temperature.
Electric dust removal is also a well established and reliable technique in the field of dust removal by applying an electric charge to dust particles through a corona electrode and then removing the dust particles through a dust collecting electrode having an opposite electric charge. The technology can successfully finish dust removal under the condition of reasonable gas atmosphere and proper dust specific resistance under the condition of extremely low pressure drop requirement, but for particles with the particle size of less than 2 microns, the efficiency of the electric dust remover is not high, and the particles with the particle size of less than 2 microns are just in an area with less effective energy expansion charge and electric field charge, so the dust removal effect is not high. However, the design of electric dust removal at operating temperatures above 400 ℃ is special because metal plates are easily deformed during rapping at temperatures of 400 ℃ or higher, the equipment box is also easily ventilated, and the charge performance of dust at high temperatures is different from that at lower temperatures. At present, in order to reach the national increasingly strict emission standard of tail gas dust concentration, many enterprises adopt an electric-bag composite dust removal scheme, namely, large particles are removed by electric dust removal, tiny dust is coagulated, and then tiny particles in the dust are removed by a bag-type dust remover. However, as mentioned above, this dust removal solution is also not effective in removing dust from exhaust gases having temperatures above 300 ℃ because the bag-type dust remover cannot reach this use temperature.
In 2004, Yangzhou, in patent CN 1647847A, disclosed a new technique for dust removal using two or more diameter sizes of pellets stacked as a granular bed. In the technical scheme, the lower layer of the dust remover piles big balls, the upper layer piles small balls, and the dust-containing gas passes through the dust removal bed layer from top to bottom, so that dust particles are removed, and the bed layer saturated by the dust particles can blow dust out through reverse fluidized airflow, so that the regeneration of the bed layer is realized. The technical scheme avoids the problem that high-temperature flue gas cannot be treated by using a cloth bag, and the dust containing space between the small balls is large, so that the dust containing capacity of the device is greatly increased, the device has important industrial value, and has already obtained practical industrial application. However, the technology has a certain problem, firstly, the back flushing regeneration process of the dust removal particle layer through fluidization actually drives the dust from a deposition state into airflow again to be in a pneumatic transmission state, and the operation of dust settling and collecting is inevitably required again, although the airflow is greatly reduced, the dust concentration is very high, and if the bag is not added, the fine dust in the dust collection particle layer can easily escape. Secondly, the technical scheme still can not be used for the dust removal operation of the waste gas with ultra-high temperature (>1000 ℃), because at such high temperature, the grate plate of the lower layer supporting the large balls can only use ceramic materials, but the ceramic materials are not easy to meet the requirements on bending resistance and machine shaping.
In conclusion, how to remove dust in ultrahigh-temperature exhaust gas (1000 ℃) containing a large amount of high-grade heat energy is a technical problem which is not solved at present.
Disclosure of Invention
Aiming at the problem of removing dust in ultrahigh-temperature waste gas (1000 ℃) containing a large amount of high-grade heat energy in the prior art, the invention aims to provide a high-temperature gas dust removal device and a dust removal method and application thereof.
The invention aims to adopt ceramic particles as a heat carrier, a plurality of groups of ceramic plate groups which are arranged in an inverted splayed shape are arranged, the ceramic particles are filled in gaps among the ceramic plate groups to form a ceramic particle wall, and high-temperature waste gas (more than or equal to 400 ℃, particularly more than or equal to 1000 ℃) passes through the ceramic particle wall, so that dust particles in the waste gas are removed.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a gas dedusting apparatus comprising ceramic particles, a plurality of ceramic plate sets, and a discharge valve; wherein, the ceramic plate group consists of two ceramic plates which are placed in an inverted splayed shape; the ceramic plate groups are longitudinally arranged by taking the central axis as an axis, and the ceramic plate surfaces on the same side in each ceramic plate group are in a parallel state; the ceramic plate group arranged at the lowermost layer is connected with a discharge valve; the ceramic particles are filled in the gaps between the ceramic plate groups.
The term "a plurality" in the "a plurality of ceramic plate groups" means that the number of ceramic plate groups is not less than 2, preferably 2 to 20, for example, 2, 4, 6, 8, 10, 12, 14, 16, 18 or 20, and more preferably 2 to 10; which is determined according to the specific production needs, the actual equipment dimensions and the load bearing limits of the lowermost ceramic plate package.
Ceramic particles are filled in gaps among the ceramic plate groups to form ceramic particle walls, and high-temperature exhaust gas passes through the ceramic particle walls, so that dust particles in the exhaust gas are removed. The ceramic particles are preferably filled in such an amount that the gas completely passes through the particle walls, and if the filling amount is too small, the gas directly flows away without passing through the particle walls.
Preferably, the device further comprises a vibrating screen, a ceramic particle pushing device, a dust pushing device and a ceramic particle conveying device.
Wherein, the discharge valve below is arranged in to the shale shaker, and ceramic granule pusher arranges the shale shaker below in, and ceramic granule pusher arranges ceramic granule pusher below in, and ceramic granule pusher's export links to each other with ceramic granule conveyor.
Preferably, the ceramic particle pushing device is an auger.
Preferably, the dust pushing device is an auger.
Preferably, the ceramic particle conveying device is a lifter.
Preferably, the ceramic plate group of the gas dust removal device is fixed in the airflow duct; the ceramic plate group of the gas dust removal device and the ceramic particles filled in the ceramic plate group obstruct an airflow channel and are forced to flow through a ceramic particle wall formed by the ceramic particles.
Preferably, the two ceramic plates of the ceramic plate group are square ceramic plates having the same shape and size.
Preferably, the square ceramic plate is a rectangular ceramic plate.
Preferably, the short side of the rectangular ceramic plate is 8-50 cm, such as 8cm, 10cm, 13cm, 15cm, 17cm, 20cm, 23cm, 25cm, 27cm, 30cm, 33cm, 35cm, 37cm, 40cm, 43cm, 45cm, 47cm or 50 cm.
Preferably, the material of the ceramic plates of the ceramic plate group is any one or a combination of at least two of cordierite, mullite, silicon carbide quartz ceramic, alumina ceramic, zirconia ceramic or common ceramic, and the combination is exemplified by, typically but not limited to: cordierite and mullite combination, mullite and silicon carbide quartz ceramic combination, silicon carbide quartz ceramic and alumina ceramic combination, zirconia ceramic and common ceramic combination, cordierite, mullite and silicon carbide quartz ceramic combination, alumina ceramic, zirconia ceramic and common ceramic combination, cordierite, mullite, silicon carbide quartz ceramic, alumina ceramic, zirconia ceramic and common ceramic combination, and the like.
Preferably, the two ceramic plates of the ceramic plate group are placed in an inverted splayed shape, and the distance between the bottom edges of the two ceramic plates is 5-50 cm, such as 5cm, 8cm, 10cm, 13cm, 15cm, 17cm, 20cm, 23cm, 25cm, 27cm, 30cm, 33cm, 35cm, 37cm, 40cm, 43cm, 45cm, 47cm or 50 cm.
Preferably, two ceramic plates of the ceramic plate group are placed in an inverted-splayed shape, and an included angle between each ceramic plate and a plane where the bottom edge of each ceramic plate is located is 30-60 degrees, such as 30 degrees, 33 degrees, 35 degrees, 37 degrees, 40 degrees, 43 degrees, 45 degrees, 47 degrees, 50 degrees, 53 degrees, 55 degrees, 57 degrees or 60 degrees.
Preferably, the plane of the bottom of each group of ceramic plate groups is in the same plane as the plane of the top of the ceramic plate group arranged below the group of ceramic plate groups.
Preferably, the ceramic particles are inorganic ceramic spheres.
Preferably, the inorganic ceramic spheres comprise ceramic spheres with the particle size of 8-30 mm and ceramic spheres with the particle size of 3-6 mm; wherein the ceramic spheres with the particle size of 8-30 mm can have the particle size of 8mm, 10mm, 13mm, 15mm, 17mm, 20mm, 23mm, 25mm, 27mm or 30mm and the like; the ceramic spheres with the particle size of 3-6 mm can have the particle size of 3mm, 3.3mm, 3.5mm, 3.7mm, 4mm, 4.3mm, 4.5mm, 4.7mm, 5mm, 5.3mm, 5.5mm, 5.7mm or 6mm, etc.
Preferably, the ratio of the volume of the ceramic spheres having a particle size of 8 to 30mm to the volume of the ceramic spheres having a particle size of 3 to 6mm is (2 to 9): (8 to 1), for example, 2:8, 2.5:7.5, 3:7, 3.5:6.5, 4:6, 4.5:5.5, 5:5, 5.5:4.5, 6:4, 6.5:3.5, 7:3, 7.5:2.5, 8:2, 8.5:1.5 or 9:1, and more preferably (6 to 8): 4 to 2. The ratio of the volume of the ceramic spheres with the particle size of 8-30 mm to the volume of the ceramic spheres with the particle size of 3-6 mm is 2-9: 8-1, so that the airflow can be well controlled, and the dust removal efficiency is improved; the bulk volume is the apparent bulk volume.
Preferably, the material of the inorganic ceramic sphere is any one or a combination of at least two of cordierite ceramic, mullite ceramic, silicon carbide ceramic, quartz ceramic, alumina ceramic, zirconia ceramic or common ceramic; typical but non-limiting examples of such combinations are: a combination of cordierite ceramic and mullite ceramic, a combination of mullite ceramic and silicon carbide ceramic, a combination of silicon carbide ceramic and quartz ceramic, a combination of alumina ceramic and zirconia ceramic, a combination of zirconia ceramic and common ceramic, a combination of cordierite ceramic, mullite ceramic, silicon carbide ceramic and quartz ceramic, a combination of silicon carbide ceramic, quartz ceramic, alumina ceramic and zirconia ceramic, a combination of silicon carbide ceramic, quartz ceramic, alumina ceramic, zirconia ceramic and common ceramic, a combination of cordierite ceramic, mullite ceramic, silicon carbide ceramic, quartz ceramic, alumina ceramic, zirconia ceramic and common ceramic, and the like.
In a second aspect, the present invention provides a dust removing method for the gas dust removing device, the method comprising:
the method comprises the following steps that dust is removed by air flow containing dust penetrating through ceramic particles filled in gaps among ceramic plate groups, after the dust adsorbed by the ceramic particles reaches a saturated state, a discharge valve is opened, the ceramic particles are discharged onto a vibrating screen, the vibrating screen removes the dust on the ceramic particles through the vibrating screen, the ceramic particles with the dust removed through screening are pushed to a ceramic particle conveying device through a ceramic particle pushing device, then are conveyed to the top of a gas dust removal device through the ceramic particle conveying device, and then are poured into the gaps among the ceramic plate groups; the dust sieved through the vibrating screen is pushed out of the gas dust removal device by the dust pushing device.
Preferably, the temperature of the dust-containing gas stream is at least 400 ℃, such as at least 400 ℃, 450 ℃, 500 ℃, 550 ℃, 600 ℃, 650 ℃, 700 ℃, 750 ℃, 800 ℃, 850 ℃, 900 ℃, 950 ℃, 1000 ℃, 1050 ℃, 1100 ℃, 1150 ℃, 1200 ℃, 1250 ℃ or 1300 ℃ and higher, more preferably at least 1000 ℃.
In a third aspect, the present invention provides the use of the gas dust removing device, which is applied to the technical field of dust removal.
Compared with the prior art, the invention has the following beneficial effects:
(1) the dust filtering modules of the gas dust removal device are all made of ceramic materials, a plurality of groups of ceramic plate groups which are arranged in an inverted splayed shape are arranged, and ceramic particles are filled in gaps formed by the ceramic plate groups to form ceramic particle walls, so that the traditional technical scheme that ceramic balls are laid on a porous plate is avoided, the ceramic devices with pore passages or slits do not need to be processed, and the dust removal device is easy to realize through ceramic parts with common shapes.
(2) The gas dust removal device provided by the invention can resist high-temperature tail gas, has a stable and efficient dust removal effect on waste gas at the temperature of 400-1000 ℃, also has a good dust removal effect on ultrahigh-temperature tail gas at the temperature of more than or equal to 1000 ℃, and can reach a dust removal rate of more than 95% for dust with the particle size of more than 5 microns in tail gas at the temperature of more than 1000 ℃.
(3) The gas dust removal device can be completely prepared by adopting ceramic devices, so that the damage of high temperature to metal materials can be avoided; and the ceramic particles after dust collection are easy to recycle, and have good economic benefit and application prospect.
Drawings
FIG. 1 is a side view of a ceramic particle and a plurality of ceramic plate sets in a gas dedusting apparatus according to the present invention;
FIG. 2 is an oblique view of ceramic particles and a plurality of ceramic plate groups in the gas dust removing apparatus according to the present invention;
FIG. 3 is a side view of a ceramic plate pack in the gas dedusting apparatus of the present invention;
FIG. 4 is a schematic structural view of a gas dust removing apparatus according to the present invention;
the method comprises the following steps of 1-ceramic particles, 2-ceramic plate groups, 3-dust-containing airflow, 4-dust-removed airflow, 5-vibrating screens, 6-ceramic particle pushing devices, 7-dust outlets, 8-dust pushing devices, 9-ceramic particle conveying devices, 10-discharge valves, a-the distance between the bottom edges of two ceramic plates, b-the length of the short edge of a rectangular ceramic plate, and c-the included angle between the ceramic plate and the plane where the bottom edge of the rectangular ceramic plate is located.
Detailed Description
For the purpose of facilitating an understanding of the present invention, the present invention will now be described by way of examples. It should be understood by those skilled in the art that the examples are only for the purpose of facilitating understanding of the present invention and should not be construed as specifically limiting the present invention.
The invention provides a gas dust removal device as shown in figure 4, which comprises ceramic particles 1, a plurality of ceramic plate groups 2 and a discharge valve 10; wherein, the ceramic plate group 2 is composed of two ceramic plates which are placed in an inverted splayed shape as shown in fig. 3; the ceramic plate groups 2 are arranged longitudinally with the central axis as the axis, and the ceramic plate surfaces on the same side in each ceramic plate group 2 are parallel, as shown in fig. 1 and 2; the ceramic plate group 2 arranged at the lowermost layer is connected with a discharge valve 10; the ceramic particles 1 are filled in the gaps between the ceramic plate package 2.
The device also comprises a vibrating screen 5, a ceramic particle pushing device 6, a dust pushing device 8 and a ceramic particle conveying device 9; wherein, shale shaker 5 is arranged in discharge valve 10 below, and ceramic granule pusher 6 is arranged in shale shaker 5 below, and ceramic granule pusher 6 below is arranged in to dust pusher 8, and ceramic granule pusher 6's export links to each other with ceramic granule conveyor 9.
Example 1:
arranging 10 groups of ceramic plate groups 2 with two ceramic plates arranged in an inverted splayed shape in a high-temperature airflow air channel from bottom to top, filling ceramic particles 1 into the ceramic plate groups 2 from top to bottom to form a ceramic particle wall, and removing dust by the aid of dust-containing high-temperature airflow through the ceramic particle wall; wherein the particle size of the large-particle ceramic particle sphere is 8mm, the particle size of the small-particle ceramic particle sphere is 3mm, the ratio of the accumulation volume of the large-particle ceramic particle sphere to the apparent accumulation volume of the small-particle ceramic particle sphere is 2:8, and the ceramic particle 1 is made of cordierite ceramic; the two ceramic plates of the ceramic plate group 2 are rectangular ceramic plates, the short side length of the two ceramic plates is 8cm, the long side length of the two ceramic plates is 1m, the distance between the bottom edges of the two ceramic plates is 5cm, and the included angle between each ceramic plate and the plane where the bottom edge is located is 60 degrees.
When the ceramic particles 1 are saturated by dust, the ceramic particles are discharged onto the vibrating screen 5 at the lower part through the discharge valve 10 at the lower part, the dust is screened out through vibration, the ceramic particles with the dust screened out are pushed to the elevator 9 through the known ceramic particle spiral pusher 6, then are lifted to the top end of the dust remover through the elevator 9, are dumped into gaps among ceramic plate groups again, the dust removal operation is continued, the dust screened out by the vibrating screen 4 is pushed to the dust outlet 7 through the other known dust spiral pusher 8, and is discharged out of the high-temperature dust removal device.
The dust removal rate of the dust removal device to 10 microns in the tail gas at 1000 ℃ is 95%.
Example 2:
the number of the ceramic plate groups 2 is 8; the particle size of the large-particle ceramic particle sphere is 20mm, the particle size of the small-particle ceramic particle sphere is 4mm, the ratio of the accumulation volume of the large-particle ceramic particle sphere to the apparent accumulation volume of the small-particle ceramic particle sphere is 9:1, and the component of the ceramic particle 1 is mullite ceramic; the other steps of the two ceramic plates of the ceramic plate group 2 were the same as those of example 1 except that the two ceramic plates were rectangular ceramic plates, the short side length thereof was 10cm, the bottom side interval of the two ceramic plates was 10cm, and the included angle between each ceramic plate and the plane on which the bottom side thereof is located was 45 °.
The dust removal rate of the dust removal device to 5 microns in tail gas at 1000 ℃ is 97%.
Example 3:
the number of the ceramic plate groups 2 is 5; the particle size of the large-particle ceramic particle sphere is 30mm, the particle size of the small-particle ceramic particle sphere is 5mm, the ratio of the accumulation volume of the large-particle ceramic particle sphere to the apparent accumulation volume of the small-particle ceramic particle sphere is 6:4, and the component of the ceramic particle 1 is SiC ceramic; the other steps of the two ceramic plates of the ceramic plate group 2 were the same as those of example 1 except that the two ceramic plates were rectangular ceramic plates having a short side length of 50cm, the bottom side interval of the two ceramic plates was 50cm, and the included angle between each ceramic plate and the plane where the bottom side is located was 60 °.
The dust removal rate of the dust removal device to 5 microns in tail gas at 1000 ℃ is 97%.
Example 4:
except that the particle size of the large-particle ceramic particle sphere is 10mm, the particle size of the small-particle ceramic particle sphere is 3mm, the ratio of the accumulation volume of the large-particle ceramic particle sphere to the apparent accumulation volume of the small-particle ceramic particle sphere is 8:2, and the component of the ceramic particle 1 is SiC ceramic; the other steps are the same as those in example 1 except that the two ceramic plates of the ceramic plate group 2 are rectangular ceramic plates, the short side length is 20cm, the long side length is 2m, the distance between the bottom edges of the two ceramic plates is 20cm, and the included angle between each ceramic plate and the plane where the bottom edge is located is 45 degrees.
The dust removal rate of the dust removal device to 10 microns in tail gas at 1000 ℃ is 97%.
Example 5:
the particle size of the ceramic particle ball except the large particle is 10mm, the particle size of the small particle is 3mm, the ratio of the accumulation volume of the large particle to the apparent accumulation volume of the small particle is 5:5, and the ceramic particle 1 is made of alumina ceramic; the other steps are the same as those in example 1 except that the two ceramic plates of the ceramic plate group 2 are rectangular ceramic plates, the short side length is 20cm, the long side length is 2m, the distance between the bottom edges of the two ceramic plates is 30cm, and the included angle between each ceramic plate and the plane where the bottom edge is located is 45 degrees.
The dust removal rate of the dust removal device to the tail gas with the temperature of 1100 ℃ of 10 microns is 98%.
Example 6:
except that the particle size of the large-particle ceramic particle sphere is 10mm, the particle size of the small-particle ceramic particle sphere is 3mm, the ratio of the accumulation volume of the large-particle ceramic particle sphere to the apparent accumulation volume of the small-particle ceramic particle sphere is 7:3, and the ceramic particle 1 is made of quartz ceramic; the other steps of the two ceramic plates of the ceramic plate group 2 were the same as those of example 1 except that the two ceramic plates were rectangular ceramic plates, the short side length was 20cm, the long side length was 2m, the bottom side interval of the two ceramic plates was 10cm, and the included angle between each ceramic plate and the plane where the bottom side is located was 50 °.
The dust removal rate of the dust removal device to the tail gas of 1100 ℃ of 10 microns is 94%.
Example 7:
except that the particle size of the large-particle ceramic particle sphere is 10mm, the particle size of the small-particle ceramic particle sphere is 3mm, the ratio of the accumulation volume of the large-particle ceramic particle sphere to the apparent accumulation volume of the small-particle ceramic particle sphere is 5:5, and the component of the ceramic particle 1 is zirconia ceramic; the other steps are the same as those in example 1 except that the two ceramic plates of the ceramic plate group 2 are rectangular ceramic plates, the short side length of each ceramic plate is 30cm, the long side length of each ceramic plate is 2m, the distance between the bottom edges of the two ceramic plates is 20cm, and the included angle between each ceramic plate and the plane where the bottom edge is located is 45 degrees.
The dust removal rate of the dust removal device to 10 microns in tail gas at 1100 ℃ is 95%.
Example 8:
the procedure was as in example 1 except that the spheres of the small ceramic particles had a particle size of 6mm and the angle between each ceramic plate in the ceramic plate group 2 and the plane on which the bottom edge thereof was located was 30 °.
The dust removal rate of the dust removal device to 10 microns in tail gas at 400 ℃ is 98%.
Example 9:
the apparatus of example 1 was used to treat the 700 ℃ dusty tail gas, which had a dust removal rate of 97% at 10 μm.
From the results of the above embodiments, it can be seen that the dust filtration modules of the gas dust removal device described in the present invention all use ceramic devices, multiple groups of ceramic plate groups placed in an inverted-splayed shape are provided, and ceramic particles are filled in the gaps formed by the ceramic plate groups to form a ceramic particle wall, thereby avoiding the conventional technical scheme of laying ceramic pellets on a porous plate, and the dust removal device is easily implemented by ceramic components of common shapes without processing ceramic devices having ducts or slits. The gas dust removal device provided by the invention can resist high-temperature tail gas, has a stable and efficient dust removal effect on waste gas at the temperature of 400-1000 ℃, also has a good dust removal effect on ultrahigh-temperature tail gas at the temperature of more than or equal to 1000 ℃, and can reach a dust removal rate of more than 95% for dust with the particle size of more than 5 microns in tail gas at the temperature of more than 1000 ℃. The gas dust removal device can be completely prepared by adopting ceramic devices, so that the damage of high temperature to metal materials can be avoided; and the ceramic particles after dust collection are easy to recycle, and have good economic benefit and application prospect.
The applicant states that the present invention is illustrated by the above examples to show the detailed process equipment and process flow of the present invention, but the present invention is not limited to the above detailed process equipment and process flow, i.e. it does not mean that the present invention must rely on the above detailed process equipment and process flow to be implemented. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (16)
1. A gas dust removal device, characterized in that the device comprises ceramic particles (1), a plurality of ceramic plate groups (2) and a discharge valve (10);
wherein the ceramic plate group (2) is composed of two ceramic plates which are placed in an inverted splayed shape; the ceramic plate groups (2) are longitudinally arranged by taking the central axis as an axis, and the ceramic plate surfaces on the same side in each ceramic plate group (2) are in a parallel state; the ceramic plate group (2) arranged at the lowest layer is connected with a discharge valve (10); the ceramic particles (1) are filled in gaps among the ceramic plate groups (2); the distance between the bottom edges of the two ceramic plates is 5-50 cm; the included angle between each ceramic plate and the plane where the bottom edge of each ceramic plate is located is 30-60 degrees; dust-containing airflow passes through the ceramic particles (1) filled in gaps among the ceramic plate groups (2) for dust removal, and after dust adsorbed by the ceramic particles (1) reaches a saturated state, a discharge valve (10) is opened;
the ceramic particles (1) are inorganic ceramic spheres, and the inorganic ceramic spheres comprise ceramic spheres with the particle size of 8-30 mm and ceramic spheres with the particle size of 3-6 mm; the ratio of the volume of the ceramic spheres with the grain size of 8-30 mm to the volume of the ceramic spheres with the grain size of 3-6 mm is (2-9) to (8-1);
the plane formed by the bottom of each group of ceramic plate group (2) and the plane formed by the top of the ceramic plate group (2) arranged below the ceramic plate group (2) are in the same plane.
2. A gas dedusting apparatus according to claim 1, characterized in that the apparatus further comprises a vibrating screen (5), a ceramic particle pushing device (6), a dust pushing device (8) and a ceramic particle conveying device (9);
the ceramic particle conveying device comprises a vibrating screen (5), a ceramic particle pushing device (6), a dust pushing device (8), a ceramic particle conveying device (9) and a dust pushing device (6), wherein the vibrating screen (5) is arranged below a discharge valve (10), the ceramic particle pushing device (6) is arranged below the vibrating screen (5), and an outlet of the ceramic particle pushing device (6) is connected with the ceramic particle conveying device (9).
3. A gas dusting device according to claim 2, characterized in that said ceramic particle pushing device (6) is an auger.
4. A gas dusting arrangement according to claim 2, characterized in that the dust pushing device (8) is an auger.
5. A gas dusting device according to claim 2, characterized in that said ceramic particle transferring means (9) is a lifter.
6. A gas dusting device according to claim 1, characterized in that the ceramic plate pack (2) of the gas dusting device is fixed in the gas flow duct.
7. A gas dusting device according to claim 1, characterized in that the two ceramic plates of the ceramic plate group (2) are square ceramic plates of the same shape and size.
8. A gas dusting device according to claim 7, whereby the square ceramic plate is a rectangular ceramic plate.
9. A gas dedusting apparatus as in claim 8, wherein the short side of the rectangular ceramic plate is 8-50 cm long.
10. A gas dedusting apparatus as defined in claim 1, characterized in that the ceramic plates of the ceramic plate group (2) are made of common ceramic;
the ceramic plates of the ceramic plate group (2) are made of any one or a combination of at least two of cordierite, mullite, silicon carbide quartz ceramic, alumina ceramic and zirconia ceramic.
11. The gas dust removing device according to claim 1, wherein the ratio of the volume of the ceramic spheres having a particle size of 8 to 30mm stacked to the volume of the ceramic spheres having a particle size of 3 to 6mm stacked is (6 to 8): 4 to 2.
12. The gas dust collector of claim 1, wherein the inorganic ceramic spheres are made of common ceramic;
the material of the inorganic ceramic sphere is any one or the combination of at least two of cordierite ceramic, mullite ceramic, silicon carbide ceramic, quartz ceramic, alumina ceramic or zirconia ceramic.
13. A method of dedusting a gas dedusting apparatus as recited in any one of claims 1-12, wherein the method is:
dust-containing airflow passes through the ceramic particles (1) filled in gaps among the ceramic plate groups (2) for dust removal, after the dust adsorbed by the ceramic particles (1) reaches a saturated state, a discharge valve (10) is opened, the ceramic particles (1) are discharged onto a vibrating screen (5), the vibrating screen (5) removes the dust on the ceramic particles (1) through the vibrating screen, the ceramic particles (1) with the dust removed are pushed to a ceramic particle conveying device (9) through a ceramic particle pushing device (6), then conveyed to the top of a gas dust removal device through the ceramic particle conveying device (9), and then poured into the gaps among the ceramic plate groups (2); the dust sieved by the vibrating screen (5) is pushed out of the gas dust removal device by the dust pushing device (8).
14. A dedusting method as set forth in claim 13 wherein the temperature of the dust-laden air stream is greater than or equal to 400 ℃.
15. A dedusting method as set forth in claim 14 wherein the temperature of the dust-laden air stream is greater than or equal to 1000 ℃.
16. Use of a gas dedusting apparatus according to any of claims 1-12 in dedusting technology.
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Effective date of registration: 20210804 Address after: 224001 group 1, village committee of the people's Federation of China, Tinghu New District, Yancheng City, Jiangsu Province (28) Patentee after: JIANGSU ZHONGKE RUISAI POLLUTION CONTROL ENGINEERING Co.,Ltd. Patentee after: Institute of Process Engineering, Chinese Academy of Sciences Address before: Room 811 and 817, green nest building, environmental protection science and Technology City, Tinghu District, Yancheng City, Jiangsu Province, 224001 Patentee before: JIANGSU ZHONGKE RUISAI POLLUTION CONTROL ENGINEERING Co.,Ltd. |