CN110523169B - Movable granular bed dust removal device capable of adjusting thickness of filter material - Google Patents
Movable granular bed dust removal device capable of adjusting thickness of filter material Download PDFInfo
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- CN110523169B CN110523169B CN201910863420.5A CN201910863420A CN110523169B CN 110523169 B CN110523169 B CN 110523169B CN 201910863420 A CN201910863420 A CN 201910863420A CN 110523169 B CN110523169 B CN 110523169B
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- 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
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
- B01D46/32—Particle separators, e.g. dust precipitators, using loose filtering material the material moving during filtering
- B01D46/34—Particle separators, e.g. dust precipitators, using loose filtering material the material moving during filtering not horizontally, e.g. using shoots
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Abstract
The invention relates to the field of dust removal devices for dust-containing gas, in particular to a movable granular bed dust removal device capable of adjusting the thickness of a filter material. The device comprises a bed body, a filter material inlet (1), a baffle plate (3) capable of adjusting the thickness of a bed layer, a filter material outlet (4), a dust-containing gas inlet (5) and a clean gas outlet (6); the filter material inlet (1) is positioned at the top of the bed body, the filter material outlet (4) is positioned at the bottom of the bed body, the dust-containing gas inlet (5) is positioned at the upper part of the side wall of the bed body, and the clean gas outlet (6) is positioned at the lower part of the side wall of the bed body opposite to the dust-containing gas inlet; the adjustable bed thickness baffle (3) is positioned in the bed body and vertically arranged between the dust-containing gas inlet (5) and the filter material inlet (1). The device has the advantages of simple structure, high dust removal efficiency, uniform and adjustable bed layer thickness, good flowability of bed material particles and low filtration resistance.
Description
Technical Field
The invention relates to the field of dust removal devices for dusty gas, in particular to a movable granular bed filtering dust removal device for treating dusty gas, and particularly relates to an adjustable movable granular bed gas purifying dust removal device suitable for treating dusty gas with high temperature, high viscosity and oil content.
Background
In actual industrial production, a large amount of dust-containing gas is often generated, such as high-temperature dust-containing pyrolysis oil gas, industrial dust-containing waste gas and the like. The existing purification methods for high-temperature gas comprise wet dust removal, cyclone dust removal, electrostatic dust removal, bag type filtration dust removal, sintered porous metal filtration dust removal, porous ceramic filtration dust removal, particle bed dust removal and the like. The particle layer filtering and dedusting technology has the advantages of high dedusting efficiency, high temperature resistance, wide source of used filter materials, low price and the like, thereby being widely concerned.
The currently common particle layer filtration and dust removal modes include a fixed bed mode and a moving bed mode. The fixed bed filter usually adopts bed material replacement or fluidized back flushing for ash removal during a certain time of operation, and the single bed intermittent operation generally adopts double bed switching operation for continuous production. The fixed bed dust removing equipment has large occupied area and more investment. The moving bed granular layer filter operates by continuously moving and updating the granular filter material, is suitable for continuous production operation and occupies small area.
The invention of Chinese patent application discloses an inclined particle bed filter device and a method (with the publication number of CN 107096335A), wherein a static filter material layer is arranged on an inclined filter bed body of the device, and a movable filter material layer is arranged on the upper part of the static filter material layer. Because adopt fixed filter bed body, lead to the dust to pile up at the fixed grained layer in lower part easily, simultaneously, because different filter bed materials pile up the angle difference, lead to bed material to pile up in different positions easily, bed material thickness is uneven, is difficult to guarantee filter particle's continuous movement, influences the normal operating of granule bed. The invention patent application of Chinese announced "a moving bed granular layer continuous filtration system with adjustable filter layer thickness" (publication number is CN 106964217A), provides a moving bed granular layer continuous filtration system with adjustable filter layer thickness, including: the feeding channel, the first inclined filtering channel, the longitudinal filtering channel, the second inclined filtering channel and the material collecting channel are arranged in the longitudinal filtering channel, the bottom of the feeding channel is connected with the top of the first inclined filtering channel, the bottom of the first inclined filtering channel is connected with the top of the longitudinal filtering channel, the bottom of the longitudinal filtering channel is connected with the top of the second inclined filtering channel, and the bottom of the second inclined filtering channel is connected with the top of the material collecting channel; the top of the feed channel is provided with a filtered particle inlet, one side of the bottom of the feed channel, which is close to the longitudinal filtering channel, is provided with a particle thickness adjusting baffle, the side wall of the first oblique filtering channel and the side wall of the second oblique filtering channel are correspondingly provided with a first smoke filtering port and a second smoke filtering port, the bottom of the collecting channel is provided with a discharge channel, and a discharge valve is arranged in the discharge channel. The dust removal system can regulate the thickness of the bed material as a function of the longitudinal filter channels, i.e. the bed material must fill the longitudinal filter channels. Therefore, the thickness of the bed material of the system can be adjusted only in a small range. The filter surface of first and second slant filtration passageway receives the influence of granule pile angle, filters to adopting the less granule of pile angle and leads to the dust to pile up at the entrance easily, and accumulational dust is difficult to take out the dust remover by the filter material, and long-term the use will cause the gas inlet to block, and the pressure drop increases.
Disclosure of Invention
The invention aims to solve the technical problem of providing a movable granular bed dust removal device capable of adjusting the thickness of a filter material aiming at the current situation of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention relates to a movable granular bed dust removal device capable of adjusting the thickness of a filter material, which comprises a bed body, a filter material inlet 1, a baffle 3 capable of adjusting the thickness of a bed layer, a filter material outlet 4, a dust-containing gas inlet 5 and a clean gas outlet 6;
wherein, the filter material inlet 1 is positioned at the top of the bed body, the filter material outlet 4 is positioned at the bottom of the bed body, the dust-containing gas inlet 5 is positioned at the upper part of the side wall of the bed body, and the clean gas outlet 6 is positioned at the lower part of the side wall of the bed body opposite to the dust-containing gas inlet;
the baffle 3 with adjustable bed thickness is positioned in the bed body and is vertically arranged between the dust-containing gas inlet 5 and the filter material inlet 1.
The movable granular bed dust removal device further comprises an adjustable filter material baffle 2 positioned in the bed body and arranged between the filter material inlet 1 and the filter material outlet 4. The adjustable filter material baffle 2 is obliquely arranged.
According to the moving particle bed dust removal device, it is further preferable that the adjustable filter material baffle plate 2 is arranged to be one or more than two. The adjustable bed thickness baffle 3 can be arranged into one or more than two. When adjustable filter material baffle sets up to more than two, the shutter form can be constituteed to a plurality of adjustable filter material baffles, and adjustable filter material baffle is coaxial can dismantle, and adjustable filter material baffle connecting axle is connected with outside handle. According to the pile angle of different filter materials, the angle of the inner adjustable filter material baffle plate is adjusted by the outer handle. The angle of the adjustable filter material baffle is larger than or equal to the particle accumulation angle.
According to the moving particle bed dust removal device, as an option, the upper part of the baffle 3 with the adjustable bed thickness can be further provided with a baffle adjusting shaft 7, and the baffle adjusting shaft 7 is connected with an external handle. The height of the internal baffle is adjusted through the handle, so that the filtering height of the particle layer is controlled.
The moving particle bed dust removing device is characterized in that preferably, the filter material inlet 1 is arranged diagonally to the filter material outlet 4, and the dusty gas inlet 5 is arranged diagonally to the clean gas outlet 6.
The moving granular bed dust collector of the invention contains granular filter material, and the used filter material granules generally comprise spherical or non-spherical granules with the particle size of 0.5-8mm, such as ceramic balls, perlite, sand stones, activated carbon and the like. The thickness of the filter layer formed by the granular filter material is adjusted within the range of 5-2000 mm. Alternatively, the filter layer may have a thickness of 30mm to 500mm, such as in particular 200mm or 250mm, etc.
The baffle plate with adjustable bed thickness can be independently adjusted according to the required thickness of the filter material bed.
Furthermore, the invention does not limit the specific material of the baffle plate with adjustable bed thickness, and the baffle plate can be made of any material which can resist the temperature of the dust-containing gas. The material is not limited to a high temperature resistant metal material, but can be other high temperature resistant non-metal materials, such as high temperature resistant inorganic non-metal materials or organic materials.
The filter material used in the invention can move intermittently or continuously during the operation process.
The invention aims to solve the technical problems that in the prior art, due to uneven gas flow and particle flow caused by uneven bed layer thickness, the filtration resistance is increased, dust is accumulated in the bed material, the normal flow of bed material particles is influenced, and the industrial production is influenced. The existing granular bed filter baffle is fixed, when dust-containing gas, particularly high-temperature dust-containing oil-containing gas such as coal pyrolysis gas, is filtered, dust can be accumulated at the filter material baffle, bed material granule flowing is influenced, and corrosive substances in the dust can cause corrosion of the filter material baffle. According to the invention, the uniform distribution of dust in the bed layer can be realized by adjusting the thickness of the filter layer, and the dust collected by the bed material can be carried out of the granular bed in time. When dust is accumulated locally due to various reasons, the accumulation of the dust on the bed material baffle can be reduced by adjusting the angle of the bed material baffle, and the normal production is ensured. The device has the advantages of simple structure, high dust removal efficiency, uniform and adjustable bed layer thickness, good flowability of bed material particles and low filtration resistance. Solves the problems that the conventional moving bed has low dust removal efficiency, the bed material can not continuously and stably move and the like, which affect the industrial production.
Drawings
FIG. 1 is a schematic structural diagram of a moving granular bed dust collector with adjustable filter material thickness according to the present invention, in which arrows indicate the gas flow direction;
reference numerals
1. The filter material inlet 2, adjustable filter material baffle 3, adjustable bed thickness baffle, 4, filter material outlet 5, dusty gas inlet 6, clean gas outlet 7, baffle regulating shaft 8, bed material granule that does not have adjustable bed thickness baffle pile up the charge level.
Detailed Description
The device of the invention is described in further detail below with reference to the embodiments of the figures.
As shown in figure 1, the movable granular bed dust removal device capable of adjusting the thickness of the filter material comprises a bed body, a filter material inlet 1, a baffle plate 3 capable of adjusting the thickness of the bed layer, a filter material outlet 4, a dust-containing gas inlet 5 and a clean gas outlet 6; wherein, the filter material inlet 1 is positioned at the top of the bed body, the filter material outlet 4 is positioned at the bottom of the bed body, the dust-containing gas inlet 5 is positioned at the upper part of the side wall of the bed body, and the clean gas outlet 6 is positioned at the lower part of the side wall of the bed body opposite to the dust-containing gas inlet; the baffle 3 with adjustable bed thickness is positioned in the bed body and is vertically arranged between the dust-containing gas inlet 5 and the filter material inlet 1.
The movable particle bed dust removal device also comprises an adjustable filter material baffle 2 positioned in the bed body and arranged between the filter material inlet 1 and the filter material outlet 4. The number of the adjustable filter material baffles 2 can be one or more than two (13 adjustable filter material baffles are provided in the figure for illustration and not limitation). The adjustable bed thickness baffle 3 can be arranged into one or more than two (4 adjustable bed thickness baffles are provided in the figure for illustration and not limitation). When adjustable filter material baffle sets up to more than two, the shutter form can be constituteed to a plurality of adjustable filter material baffles, and adjustable filter material baffle is coaxial can dismantle, and adjustable filter material baffle connecting axle is connected with outside handle.
The upper part of the baffle 3 with the adjustable bed thickness can be also provided with a baffle adjusting shaft 7 which is connected with an external handle through the baffle adjusting shaft 7. The height of the internal baffle is adjusted through the handle, so that the filtering height of the particle layer is controlled.
The filter material inlet 1 and the filter material outlet 4 are arranged diagonally, and the dusty gas inlet 5 and the clean gas outlet 6 are arranged diagonally.
When the movable granular bed dust removal device with the adjustable filter layer thickness is used for treating dust-containing gas, selected granular filter materials enter the device from the filter material inlet 1 to form the filter layer, and the adjustable filter material baffle 2 is adjusted to a certain angle which is consistent with or larger than the filter material accumulation angle; according to the thickness of the filter material, the baffle 3 with the adjustable bed thickness is adjusted to a certain height by the baffle adjusting shaft 7. The dust-containing gas enters from the dust-containing gas inlet 6, passes through the filter layer from top to bottom, and the granular filter material leaves the device through the filter material outlet 4. The filtered clean gas exits the apparatus through clean gas outlet 6.
Example 1
Taking a 3000t/a coal pyrolysis pilot plant as an example, the temperature of pyrolysis gas generated by pyrolysis is 550-650 ℃, and the dust content in the pyrolysis gas is 15.3g/Nm3The device shown in figure 1 (4 bed layer thickness baffles 3, 13 adjustable filter material baffles 2) is adopted, the height of the bed body is 3m, the width of the bed body is 1.5m, and the inclination angle of the bed material baffles is 28 degrees. The bed material adopts high temperature resistant ceramic balls with average particle diameter of 2mm, sphericity of 0.95 and density of 2873kg/m3. If the adjustable bed thickness baffle is not arranged, the bed material stacking level is shown as a bed material particle stacking level 8 without the adjustable bed thickness baffle in fig. 1, the material layer thickness is 200mm at the bed material inlet, but the material layer thickness reaches 500mm at the bed material outlet, and the filtering resistance is 1.2kPa, so that the continuous movement of the filtering particles is difficult and the gas inlet is easily blocked. Through the adjustment of the metal dust collecting baffle plate capable of adjusting the thickness of the bed layer, the thickness of the bed layer of the bed material at each part inside the bed body can be about 200mm, through continuous 72-hour pilot test, the dust filtering efficiency reaches more than 99.5 percent, and the filtering resistance is only0.5kPa。
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. The utility model provides a removal granule bed dust collector of adjustable filter material thickness, includes the bed body, its characterized in that: the movable granular bed dust removal device also comprises a filter material inlet (1), a baffle plate (3) capable of adjusting the thickness of the bed layer, a filter material outlet (4), a dust-containing gas inlet (5) and a clean gas outlet (6);
the filter material inlet (1) is positioned at the top of the bed body, the filter material outlet (4) is positioned at the bottom of the bed body, the dust-containing gas inlet (5) is positioned at the upper part of the side wall of the bed body, and the clean gas outlet (6) is positioned at the lower part of the side wall of the bed body opposite to the dust-containing gas inlet;
the adjustable bed thickness baffles (3) are positioned in the bed body and vertically arranged between the dust-containing gas inlet (5) and the filter material inlet (1), and more than two adjustable bed thickness baffles (3) are arranged;
the movable granular bed dust removal device further comprises an adjustable filter material baffle (2) positioned in the bed body and arranged between the filter material inlet (1) and the filter material outlet (4), and the number of the adjustable filter material baffle (2) is more than two.
2. A moving particle bed dust collector as claimed in claim 1, characterised in that the adjustable filter media baffles (2) are arranged obliquely.
3. The moving particle bed dust collector as claimed in claim 1 or 2, wherein the baffle plate adjusting shaft (7) is arranged at the upper part of the baffle plate (3) with adjustable bed thickness, and is connected with an external handle through the baffle plate adjusting shaft (7).
4. The moving granular bed dust collector as claimed in claim 1, wherein the moving granular bed dust collector contains granular filter material, and the thickness of the filter layer formed by the granular filter material is regulated within the range of 5-2000 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910863420.5A CN110523169B (en) | 2019-09-09 | 2019-09-09 | Movable granular bed dust removal device capable of adjusting thickness of filter material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910863420.5A CN110523169B (en) | 2019-09-09 | 2019-09-09 | Movable granular bed dust removal device capable of adjusting thickness of filter material |
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| CN110523169A CN110523169A (en) | 2019-12-03 |
| CN110523169B true CN110523169B (en) | 2021-02-02 |
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| CN201910863420.5A Active CN110523169B (en) | 2019-09-09 | 2019-09-09 | Movable granular bed dust removal device capable of adjusting thickness of filter material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110940195A (en) * | 2019-12-27 | 2020-03-31 | 中冶焦耐(大连)工程技术有限公司 | Upper material layer height adjusting device and method of rotary lime kiln preheater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5238659A (en) * | 1989-05-23 | 1993-08-24 | Kawasaki Jukogyo Kabushiki Kaisha | Moving granular bed dust removal and reaction apparatus |
| CN102716628A (en) * | 2012-06-04 | 2012-10-10 | 冀州中科能源有限公司 | Grain de-dusting filter and de-dusting filtering method |
| CN106237751A (en) * | 2016-08-29 | 2016-12-21 | 宁波大学 | A kind of grain bed dedusting catalytic unit |
| CN107096335A (en) * | 2017-05-09 | 2017-08-29 | 北京科技大学 | One kind tilts Bed Filtration device and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3770388A (en) * | 1971-05-24 | 1973-11-06 | F Zenz | Granular bed filter reactor |
| CN106964217B (en) * | 2017-05-11 | 2019-02-26 | 北京科技大学 | A kind of adjustable continuous filtration system of moving bed stratum granulosum of thickness of filter bed |
| CN107511009A (en) * | 2017-09-18 | 2017-12-26 | 北京科技大学 | A kind of high-temperature dust-containing flue gas moving granular bed purification and residual neat recovering system |
| CN110052093B (en) * | 2019-04-03 | 2020-05-08 | 北京科技大学 | Movable granular bed dust filtering device with automatic grain diameter layering and filter material layering replacement functions |
-
2019
- 2019-09-09 CN CN201910863420.5A patent/CN110523169B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5238659A (en) * | 1989-05-23 | 1993-08-24 | Kawasaki Jukogyo Kabushiki Kaisha | Moving granular bed dust removal and reaction apparatus |
| CN102716628A (en) * | 2012-06-04 | 2012-10-10 | 冀州中科能源有限公司 | Grain de-dusting filter and de-dusting filtering method |
| CN106237751A (en) * | 2016-08-29 | 2016-12-21 | 宁波大学 | A kind of grain bed dedusting catalytic unit |
| CN107096335A (en) * | 2017-05-09 | 2017-08-29 | 北京科技大学 | One kind tilts Bed Filtration device and method |
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