CN114471001B - Combined high-temperature ceramic filtering device and application method thereof - Google Patents
Combined high-temperature ceramic filtering device and application method thereof Download PDFInfo
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- CN114471001B CN114471001B CN202210058402.1A CN202210058402A CN114471001B CN 114471001 B CN114471001 B CN 114471001B CN 202210058402 A CN202210058402 A CN 202210058402A CN 114471001 B CN114471001 B CN 114471001B
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- 239000000919 ceramic Substances 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims description 31
- 238000001914 filtration Methods 0.000 title claims description 13
- 238000007664 blowing Methods 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims description 58
- 238000007789 sealing Methods 0.000 claims description 19
- 239000000428 dust Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 13
- 238000009423 ventilation Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 4
- 239000003546 flue gas Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 239000002956 ash Substances 0.000 description 13
- 238000005192 partition Methods 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4218—Influencing the heat transfer which act passively, e.g. isolations, heat sinks, cooling ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
Abstract
A combined high-temp ceramic filter unit is composed of a bottom air inlet and ash outlet section, a middle filter section, and an upper gas preheating and blowing section.
Description
Technical Field
The utility model belongs to the field of environmental protection, and particularly relates to a combined high-temperature ceramic filter device and a use method thereof.
Background
Dust is generated in thermochemical utilization processes such as pyrolysis, gasification, combustion and the like, and is carried out by high-temperature gas, and a large amount of dust enters tar in the condensation process of pyrolysis volatile products in the pyrolysis and gasification processes, so that the quality of the tar is affected; in the combustion process, a large amount of dust can be discharged along with the flue gas, and in the subsequent waste heat utilization and flue gas purification processes, a large amount of harmful substances such as heavy metals and dioxin can be enriched in the pore structure of the dust, and then dangerous wastes are formed, so that in the thermochemical utilization process, if the dust in the gas can be removed in the high-temperature process, the quality of partial products can be improved, and the generation of dangerous wastes such as fly ash can be effectively stopped.
The high-temperature ceramic membrane material is a filtering material with excellent filtering performance, high mechanical strength, excellent thermal performance and chemical corrosion resistance, has high filtering precision, high purifying efficiency up to more than 99.99 percent and the impurity concentration in the purified gas can be controlled at 1mg/m 3 In the following, the gas is very simple in the subsequent recycling process, and is environment-friendly.
However, the use temperature of the high-temperature ceramic filter which operates throughout the year is below 700 ℃, firstly, the ceramic filter is generally fixed in a mode of fixing the head and the tail of high-temperature resistant stainless steel, and because the expansion coefficients of the high-temperature resistant stainless steel and the ceramic are different, ceramic materials are easily broken due to different expansion values in the high-temperature process, secondly, the injection mode of the current ceramic filter is generally adopted, namely, a low-temperature medium (the temperature is lower than 300 ℃), the injection is carried out at the high-temperature background temperature, and ceramic pipes are damaged due to uneven heat and cold, so that the internal arrangement form of the ceramic filter and the injection mode of the ceramic filter are changed, and the method is a prerequisite for facilitating the application of the ceramic filter under the high-temperature condition.
The Chinese patent application (application number: 201510571531.0) provides a square ceramic honeycomb carrier, the inner cylinder body of the square ceramic honeycomb carrier is densely provided with air holes along the axial direction, one end of each air hole is an opening, the other end of each air hole is provided with a plugging surface, the plugging surface is arranged with the openings at intervals, a partition wall is arranged between every two adjacent air holes, micropores which are arranged in a honeycomb shape are formed in the partition wall, a catalyst coating is coated on the partition wall, the filtering area is increased to the maximum extent in a limited space, the square ceramic honeycomb carrier is convenient to install, black smoke particles in waste gas can be effectively filtered, the purifying effect is good, the ceramic honeycomb carrier is mainly used for an automobile exhaust purifier for burning oil raw materials, the using temperature is generally set below 600 ℃, the equivalent diameter is small, if the ceramic honeycomb carrier is used for burning organic solids, serious blocking problems are easily caused by precipitation of a large amount of ash, the safety of a system is further influenced, backwashing is difficult, and the integral structure of the honeycomb ceramic is also used, when the integral structure is locally broken, the whole using effect is influenced, and the economical efficiency of the whole process is further influenced. The same problem exists in the chinese patent application (201811375065.9) and chinese utility model patent (CN 205895366U).
Disclosure of Invention
In order to overcome the defects of the existing production process, the utility model provides the combined high-temperature ceramic filter device and the use method thereof, and the combined ceramic filter tube attaching structure and the high-temperature blowing process are adopted, so that the high-efficiency dust removal of the organic solid at the temperature of more than 700 ℃ is realized, the running cost consumption in the subsequent recycling treatment process is greatly reduced, and the device is convenient to apply in industry.
The technical scheme of the utility model is as follows:
the combined high-temperature ceramic filter device comprises a bottom air inlet and ash outlet section, a middle filter section and an upper gas preheating and blowing section, wherein the bottom air inlet and ash outlet section is provided with an ash outlet 1 and a high-temperature gas inlet 2; the middle filtering section is provided with a ceramic filtering pipe 5, a high-temperature resistant sealing gasket 4 and a water cooling support 3; the upper gas preheating blowing section is provided with a high-temperature gas outlet 10, a blowing box 6, a preheating pipe 7, a self-regulating valve 8 and a blowing port 9 arranged at the tail end of the preheating pipe 7 which are connected in sequence; the arrangement of the ceramic filter tube 5 comprises two forms:
form one: the cross section of the ceramic filter tube 5 is square, one end surface of the ceramic filter tube 5 is a sealing ceramic surface 11, and the other end surface is an open ventilation end surface 12; the ceramic filter pipes 5 are arranged in sequence without gaps to form a ceramic filter pipe array, and the sealing ceramic surfaces 11 and the ventilation end surfaces 12 are alternately arranged in a black-white chessboard manner on the same bottom surface or the same top surface of the ceramic filter pipe array; the bottom end of the wall surface of the ceramic filter tube 5 is sequentially provided with a high-temperature-resistant sealing gasket 4 and a water-cooling support 3;
form two: in order to further reduce the number of the ceramic filter tubes 5, the cross sections of the ceramic filter tubes 5 are in any shape, one end face of each ceramic filter tube 5 is a sealing ceramic face 11, and the other end face is an open ventilation end face 12; the ceramic filter pipes 5 are arranged in a clearance way to form a ceramic filter pipe array, the sealing ceramic surfaces 11 of all the ceramic filter pipes 5 are used as the bottom surfaces of the ceramic filter pipe array, the lower parts of the ceramic filter pipes are sequentially provided with a high-temperature-resistant sealing gasket 4 and a water-cooling support 3, and the ventilation end surfaces 12 of all the ceramic filter pipes 5 are used as the top surfaces of the ceramic filter pipe array; the interval between two adjacent ceramic filter pipes 5 is the equivalent diameter of one ceramic filter pipe 5; the top ends of two adjacent ceramic filter pipes 5 are connected through buckles;
further, the medium flowing in the water-cooling support 3 is water, and the water-cooling support 3 and the high-temperature-resistant sealing gasket 4 are cooled in the flowing process.
Further, when the ceramic filter pipes 5 are in the second form, the top ends of two adjacent ceramic filter pipes 5 are connected through buckles, and then the splicing part is secondarily sealed by adopting high-temperature resistant castable.
The application method of the combined high-temperature ceramic filter device comprises the following steps: the high-temperature dust-containing gas is sent into the device from a high-temperature gas inlet 2 of the bottom air inlet ash outlet section, and enters the inside of the ceramic filter tube array from a ventilation end face 12 at the bottom of the ceramic filter tube 5 in the first mode or from a gap between the ceramic filter tubes 5 in the second mode; due to the effect of the pressure difference, the dust-containing gas gradually enters the ceramic filter tube 5 with the sealing ceramic surface 11 at the bottom adjacent to the first mode, or the ceramic filter tube 5 in the second mode; the gas is filtered by the ceramic filter element in the flowing process, the dust is removed, the gas is discharged from the high-temperature gas outlet 10 after reaching the standard through the middle filter section, the gas is preheated in the preheating pipe 7 in the discharging process, when the pressure difference of the inlet and outlet of the middle filter section exceeds the set pressure, the blowing box 6 and the self-regulating valve 8 of the upper gas preheating blowing section are opened, the high-temperature gas in the preheating pipe 7 is blown out from the blowing opening 9 and carries out back blowing cleaning on the ceramic filter pipe 5, ash cakes formed on the ceramic filter pipe 5 are periodically removed, the online regeneration of the ceramic filter pipe 5 is realized, and the ash after back blowing is discharged through the ash outlet 1.
Further, the gas quantity stored in the preheating pipe 7 at least meets the gas quantity required by one injection, and the gas temperature in the preheating pipe 7 is more than or equal to 400 ℃.
Further, the gas sprayed from the spraying and blowing port 9 is one of nitrogen, combustible gas or flue gas.
Further, the use temperature of the ceramic filter tube 5 is 700-1500 ℃, the equivalent diameter of the ceramic filter tube 5 is 50-200 mm, and the length of the ceramic filter tube 5 is 800-2500 mm.
The utility model has the beneficial effects that:
the lower water-cooling support is adopted for sealing, the middle part limits a gas flow path, and the upper part is free to expand, so that the phenomenon that the ceramic filter tube is broken in the high-temperature process is effectively avoided, and the ceramic filter tube is convenient to apply in a high-temperature environment.
2, a combined ceramic filtering mode is adopted, and when the local ceramic filtering pipe is broken, the ceramic filtering pipe can be replaced at any time.
And 3, a regenerative type blowing process is adopted, and the blown medium is in a high-temperature state, so that the fracture phenomenon of the ceramic filter tube caused by uneven heating of cold and hot is effectively prevented.
Drawings
FIG. 1 is a schematic diagram of the structure of the whole device of the present utility model.
FIG. 2 is a cross-sectional view of the apparatus of the present utility model.
FIG. 3 is a cross-sectional view A-A of the apparatus of the present utility model using a top profiled ceramic filter tube.
FIG. 4 is an elevation view of a combination of shaped ceramic filter tubes in the present utility model when the apparatus is used with a top shaped ceramic filter tube.
FIG. 5 shows the arrangement of the top preheating pipes of the whole set of the device according to the utility model.
FIG. 6 shows the arrangement of the blowing pipe of the whole device of the present utility model.
In the figure: 1 ash outlet; 2 high temperature gas inlet; 3, water-cooling support; 4, a high-temperature-resistant sealing gasket; 5 ceramic filter tubes; 6 blowing a bellows; 7 preheating pipes; 8, self-regulating valve; 9, a blowing opening; 10 high temperature gas outlet; 11 sealing the ceramic surface; 12 ventilation end face.
Detailed Description
The following describes the embodiments of the present utility model further with reference to the drawings and technical schemes.
Examples
The high-temperature dust-containing gas is sent into the device from a high-temperature gas inlet 2 of the bottom air inlet ash outlet section, and enters the inside of the ceramic filter tube array from a ventilation end face 12 at the bottom of the ceramic filter tube 5 in the first mode or from a gap between the ceramic filter tubes 5 in the second mode; due to the effect of the pressure difference, the dust-containing gas gradually enters the ceramic filter tube 5 with the sealing ceramic surface 11 at the bottom adjacent to the first mode, or the ceramic filter tube 5 in the second mode; the gas is filtered by the ceramic filter element in the flowing process, the dust is removed, the gas is discharged from the high-temperature gas outlet 10 after reaching the standard through the middle filter section, the gas is preheated in the preheating pipe 7 in the discharging process, when the pressure difference of the inlet and outlet of the middle filter section exceeds the set pressure, the blowing box 6 and the self-regulating valve 8 of the upper gas preheating blowing section are opened, the high-temperature gas in the preheating pipe 7 is blown out from the blowing opening 9 and carries out back blowing cleaning on the ceramic filter pipe 5, ash cakes formed on the ceramic filter pipe 5 are periodically removed, the online regeneration of the ceramic filter pipe 5 is realized, and the ash after back blowing is discharged through the ash outlet 1.
The medium circulating in the water-cooling support 3 is water, and the water-cooling support 3 and the high-temperature-resistant sealing gasket 4 are cooled in the circulating process.
The gas quantity stored in the preheating pipe 7 at least meets the gas quantity required by one-time injection, and the temperature of the gas in the preheating pipe 7 is more than or equal to 400 ℃.
The gas ejected from the ejection port 9 is nitrogen.
The service temperature of the ceramic filter tube 5 is 700-1500 ℃, the equivalent diameter of the ceramic filter tube 5 is 100mm, and the length is 1000mm.
This saves half of square ceramic filter tubes as shown in figures 3 and 4.
The present utility model includes, but is not limited to, the present embodiment, and it should be noted that it will be apparent to those skilled in the art that other alternatives can be employed without departing from the technical principles of the present utility model, and these alternatives should also be considered as the protective scope of the present utility model.
Claims (6)
1. The combined high-temperature ceramic filter device is characterized by comprising a bottom air inlet and ash outlet section, a middle filter section and an upper gas preheating and blowing section, wherein the bottom air inlet and ash outlet section is provided with an ash outlet (1) and a high-temperature gas inlet (2); the middle filtering section is provided with a ceramic filtering pipe (5), a high-temperature-resistant sealing gasket (4) and a water-cooling support (3); the upper gas preheating blowing section is provided with a high-temperature gas outlet (10), a blowing box (6), a preheating pipe (7), a self-regulating valve (8) and a blowing port (9) arranged at the tail end of the preheating pipe (7) which are connected in sequence; the ceramic filter tube (5) is arranged as follows:
the section of the ceramic filter tube (5) is of any shape, one end surface of the ceramic filter tube (5) is a sealing ceramic surface (11), and the other end surface is an open ventilation end surface (12); the ceramic filter pipes (5) are arranged in a clearance way to form a ceramic filter pipe array, the sealing ceramic surfaces (11) of all the ceramic filter pipes (5) are used as the bottom surfaces of the ceramic filter pipe array, the lower parts of the ceramic filter pipes are sequentially provided with a high-temperature-resistant sealing gasket (4) and a water-cooling support (3), and the ventilation end surfaces (12) of all the ceramic filter pipes (5) are used as the top surfaces of the ceramic filter pipe array; the distance between two adjacent ceramic filter pipes (5) is equal to the equivalent diameter of one ceramic filter pipe (5); the top ends of two adjacent ceramic filter pipes (5) are connected through a buckle; and after the top ends of two adjacent ceramic filter pipes (5) are connected through buckles, the spliced part is secondarily sealed by adopting high-temperature resistant castable.
2. The combined high-temperature ceramic filter device according to claim 1, wherein the medium flowing in the water-cooling support (3) is water, and the water-cooling support (3) and the high-temperature-resistant sealing gasket (4) are cooled in the flowing process.
3. A method of using a combined high temperature ceramic filter device according to any one of claims 1-2, characterized in that it comprises the following specific steps: high-temperature dust-containing gas is sent into the device from a high-temperature gas inlet (2) of the bottom gas inlet ash outlet section and enters the inside of the ceramic filter tube array from a gap between the ceramic filter tubes (5); due to the effect of the pressure difference, the dust-containing gas gradually enters the ceramic filter tube (5); the gas flow process can be filtered by a ceramic filter element to achieve the purpose of dust removal, the gas is discharged from a high-temperature gas outlet (10) after reaching the standard through a middle filter section, the gas is preheated in a preheating pipe (7) in the gas discharge process, when the pressure difference of an inlet and an outlet of the middle filter section exceeds a set pressure, a blowing box (6) and a self-regulating valve (8) of an upper gas preheating blowing section are opened, high-temperature gas in the preheating pipe (7) is blown out from a blowing opening (9) and is subjected to back blowing cleaning on the ceramic filter pipe (5), ash cakes formed on the ceramic filter pipe (5) are periodically removed, the on-line regeneration of the ceramic filter pipe (5) is realized, and ash after back blowing is discharged through an ash outlet (1).
4. A method of using a modular high temperature ceramic filter assembly as defined in claim 3,
the gas quantity stored in the preheating pipe (7) at least meets the gas quantity required by one-time injection, and the gas temperature in the preheating pipe (7) is more than or equal to 400 ℃.
5. A method of using a combined high temperature ceramic filter device according to claim 3, wherein the gas emitted from the injection port (9) is one of nitrogen, combustible gas or flue gas.
6. The use method of the combined high-temperature ceramic filter device according to claim 3, wherein the use temperature of the ceramic filter tube (5) is 700-1500 ℃, the equivalent diameter of the ceramic filter tube (5) is 50-200 mm, and the length of the ceramic filter tube is 800-2500 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210058402.1A CN114471001B (en) | 2022-01-19 | 2022-01-19 | Combined high-temperature ceramic filtering device and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210058402.1A CN114471001B (en) | 2022-01-19 | 2022-01-19 | Combined high-temperature ceramic filtering device and application method thereof |
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| CN114471001A CN114471001A (en) | 2022-05-13 |
| CN114471001B true CN114471001B (en) | 2023-11-07 |
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| CN115400517A (en) * | 2022-08-15 | 2022-11-29 | 南京科赫科技有限公司 | High-temperature flue gas dust removal system and process |
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