CN111420648A - Dust purification method and dust purification device - Google Patents

Dust purification method and dust purification device Download PDF

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Publication number
CN111420648A
CN111420648A CN202010250237.0A CN202010250237A CN111420648A CN 111420648 A CN111420648 A CN 111420648A CN 202010250237 A CN202010250237 A CN 202010250237A CN 111420648 A CN111420648 A CN 111420648A
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China
Prior art keywords
air
fluidization
plate
dust
screen
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CN202010250237.0A
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Chinese (zh)
Inventor
傅旭明
肖中元
王跃飞
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Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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Priority to CN202010250237.0A priority Critical patent/CN111420648A/en
Publication of CN111420648A publication Critical patent/CN111420648A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
    • 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
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
    • B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • 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
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

The invention discloses a dust purification method and a dust purification device, wherein the dust purification method comprises the following steps: a1, removing particles of the activated carbon through a vibrating screen, wherein an air knife is arranged on the vibrating screen; a2, carrying out active carbon particle removal treatment by a winnowing dust removal process at the downstream of the vibrating screen; and A3, collecting the removed dust of the vibrating screen and the air screen through a dust collecting device. In the dust purification method that this application provided, get rid of the tiny granule that is less than 1.2mm in the active carbon through setting up the shale shaker, use the air knife to get rid of the remaining part fine dust in large granule active carbon surface at the shale shaker back end, get rid of the remaining fine dust in large granule active carbon surface through the shale shaker export air screen degree of depth again, consequently, the dust purification method that this application provided has reduced active carbon gas cleaning's dust emission concentration effectively.

Description

Dust purification method and dust purification device
Technical Field
The invention relates to the technical field of dust purification, in particular to a dust purification method. The invention also relates to a dust purification device.
Background
The classification of ordinary powder in activated carbon is generally performed by a sieving method, but the current finest mesh size is only about 20 μm (i.e., about 600 mesh), and particles with a diameter of 1 μm or more can be captured by a direct interception effect. And less than 1 μm particles are captured by inertial impaction and diffusion interception effects.
According to the process principle of the activated carbon, after the activated carbon from the adsorption tower is adsorbed, a large amount of fine particles such as dust are mixed on the surface and in pores of the activated carbon through the processes of direct interception, inertial impact, diffusion interception and the like. After entering the desorption tower, a large amount of activated carbon ultrafine particles, such as particles with the particle size less than 1 μm, can be generated through the high-temperature desorption effect. After the analysis, a part of fine particles (the pores of the screen are 1.2mm) are removed by screening, but the ultrafine particles attached to the surface and in the pores of the activated carbon are difficult to remove under the adsorption action of the activated carbon, so that the dust emission concentration of the flue gas purification of the activated carbon is high.
Therefore, how to reduce the dust emission concentration of activated carbon flue gas purification is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a dust purification method for reducing the dust emission concentration of activated carbon flue gas purification. Another object of the present invention is to provide a dust cleaning apparatus.
In order to achieve the above object, the present invention provides a dust purification method, comprising the steps of:
a1, removing particles of the activated carbon through a vibrating screen, wherein an air knife is arranged on the vibrating screen;
a2, carrying out active carbon particle removal treatment by a winnowing dust removal process at the downstream of the vibrating screen;
and A3, collecting the removed dust of the vibrating screen and the air screen through a dust collecting device.
Preferably, in the step a2, the air separation dedusting process includes an air screen for air separation dedusting.
The utility model provides a dust purification device, include dust collection device, air knife, shale shaker and with the air sieve that the shale shaker discharge gate is connected, dust collection device is used for collecting the shale shaker with the dust of air sieve, the air knife is installed on the shale shaker.
Preferably, at least one row of the air knives is arranged on the vibrating screen.
Preferably, the air screen comprises:
the screen box is provided with an air suction opening and an air inlet;
the fluidization plate is arranged in the screen box, air outlet screen holes blown out by air sent from the air supply device are distributed on the fluidization plate, and the air inlet guides the air sent from the air supply device to the air outlet screen holes;
the material distribution device is arranged at the top end of the screen box, and the air suction opening is communicated with the dust collection device.
Preferably, the fluidization plate comprises a first fluidization plate which is obliquely arranged and a first air inlet chamber which is hermetically connected with the bottom edge of the first fluidization plate and is formed with the lower surface of the first fluidization plate, the first fluidization plate is provided with the air outlet sieve holes, the number of the first fluidization plate is at least one, the top end of the first fluidization plate is opposite to the outlet of the distributing device, and the bottom end of the first fluidization plate is far away from the distributing device relative to the top end of the first fluidization plate;
the air inlet comprises a first air inlet used for conveying air to the first air inlet chamber;
the first fluidization plates are arranged in an inverted V shape, the top ends of the first fluidization plates are connected to form the pointed ends of the inverted V-shaped structures, and the pointed ends formed by the two first fluidization plates are opposite to the outlet center of the distributing device.
Preferably, the fluidization plate further comprises a second fluidization plate which is obliquely arranged, the second fluidization plate is provided with the air outlet sieve holes, the second fluidization plate is arranged below the first fluidization plate, the number of the second fluidization plate is at least one, the bottom end of the second fluidization plate is arranged close to the lower part of the outlet of the distributing device, and the top end of the second fluidization plate is arranged far away from the distributing device relative to the bottom end of the second fluidization plate; the two second fluidization plates are arranged in an inverted-splayed shape, a material outlet is formed between the bottom ends of the two second fluidization plates, the top ends of the two second fluidization plates are hermetically connected with the side wall, opposite to the sieve box, of the sieve box to form two second air inlet chambers which are independently arranged, and the air inlet comprises a second air inlet for conveying air to the second air inlet chambers;
the second air inlet is arranged on the bottom wall of the screen box, a first access door is arranged on the screen box and on the wall surface right opposite to the first air inlet cavity, and a second access door is arranged on the screen box and on the wall surface right opposite to the second air inlet cavity.
Preferably, the distributing device comprises an outer cylinder and a plurality of first reflecting plates arranged in a feeding channel of the outer cylinder, upward flanges are arranged on the edges of the first reflecting plates, and a blanking channel is formed between every two adjacent first reflecting plates;
the first reflecting plates are multiple, all the first reflecting plates are distributed in a multi-layer mode from top to bottom, and are adjacent to each other in a two-layer mode.
Preferably, the fluidization plate is a silicon carbide porous plate, a punching plate or a pipe orifice plate with an air outlet end protruding outwards.
Preferably, a Roots blower is further included for providing an air source to the air screen.
In the above technical solution, the dust purification method provided by the present invention comprises the steps of: a1, removing particles of the activated carbon through a vibrating screen, wherein the vibrating screen is provided with an air knife; a2, carrying out active carbon particle removal treatment by a winnowing dust removal process at the downstream of the vibrating screen; and A3, collecting the removed dust of the vibrating screen and the wind screen through a dust collecting device.
According to the above description, in the dust purification method provided by the application, the vibrating screen is arranged to remove small particles smaller than 1.2mm in the activated carbon, the air knife is used to remove the residual part of fine dust on the surface of the large-particle activated carbon at the rear section of the vibrating screen, and the residual fine dust on the surface of the large-particle activated carbon is deeply removed through the air screen at the outlet of the vibrating screen, so that the dust purification method provided by the application effectively reduces the dust emission concentration of activated carbon flue gas purification.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dust purification apparatus according to an embodiment of the present invention;
fig. 2 is a side view of a dust cleaning apparatus according to an embodiment of the present invention;
fig. 3 is a flow chart of a dust purification apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an air screen provided in an embodiment of the present invention;
FIG. 5 is a side view of an air screen provided by an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a fluidization plate provided in accordance with an embodiment of the present invention;
fig. 7 is a view illustrating an installation position of an air knife according to an embodiment of the present invention;
fig. 8 is a view showing an installation position of the spray gun according to the embodiment of the present invention.
Wherein in FIGS. 1-8: wherein in FIGS. 1-3: 1-sieve box, 2-distributing device, 3-first fluidization plate, 4-second fluidization plate, 5-material outlet, 6-second reflection plate, 7-first access door, 8-second access door, 9-second air inlet, 10-first air inlet, 11-first reflection plate, 12-first air inlet chamber, 13-second air inlet chamber, 14-air suction opening, 15-air duct, 16-tube plate, 17-air knife, 18-Roots blower, 19-bag dust collector, 20-fan-shaped spray surface and 21-slot nozzle.
Detailed Description
The core of the invention is to provide a dust purification method to reduce the dust emission concentration of activated carbon flue gas purification. The other core of the invention is to provide a dust purification device.
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Please refer to fig. 1 to 8.
In one embodiment, a method for purifying dust according to an embodiment of the present invention includes:
a1, removing particles of the activated carbon through a vibrating screen, wherein the vibrating screen is provided with an air knife 17. Specifically, at least one row of air knives 17 is arranged on the vibrating screen, and specifically, two rows of air knives 17 or at least three rows of air knives 17 may be arranged.
Preferably, the air outlet of the air knife 17 is provided with a slotted nozzle 21. As shown in fig. 8, specifically, the outlet end of the slot nozzle 21 is a convex spherical surface, the outlet slots are arranged on the spherical surface in a strip shape, the spraying surface of the slot nozzle 21 forms a fan-shaped spraying surface 20, specifically, the fan-shaped spraying surface 20 is a fan shape with 30-90 degrees, and preferably, the center of the outlet slot coincides with the bottom end of the spherical surface. Through setting up fan-shaped spray face 20, the gas curtain angle is great, conveniently sweeps, and slot formula nozzle 21 can be dismantled the connection, specifically can be fixed through the spiro union, and slot formula nozzle 21's upper reaches can set up the filter screen, improves the quality of giving vent to anger, makes things convenient for slot formula nozzle 21 to install and change.
A2, carrying out active carbon particle removal treatment by an air separation dedusting process at the downstream of the vibrating screen.
A3, carrying out active carbon particle removal treatment by an air separation dedusting process at the downstream of the vibrating screen. Specifically, the dust collecting device is a bag-type dust collector 19, and the removed dust-containing gas is collected by the bag-type dust collector 19.
Specifically, the winnowing dust removal process comprises an air screen for winnowing dust removal.
The air screen comprises a screen box 1, a fluidization plate arranged in the screen box 1 and a material distribution device 2 arranged at the top end of the screen box 1.
Specifically, the distributing device 2 comprises an outer barrel and a plurality of first reflecting plates 11 arranged in a feeding channel of the outer barrel, upward flanges are arranged on the edges of the first reflecting plates 11, a blanking channel is formed between every two adjacent first reflecting plates 11, the outer barrel can be of a square pipe body structure, preferably, the end portions of the first reflecting plates 11 on the edges are fixedly connected with the inner wall of the outer barrel, one end far away from the outer barrel is upward flanged to form an L-shaped structure, and two opposite ends of the first reflecting plates 11 in the middle position are provided with flanges to form a U-shaped structure.
As shown in fig. 4, preferably, the first reflective plates 11 are multiple, all the first reflective plates 11 are distributed in multiple layers from top to bottom, and the reflective plates of the adjacent two layers of the first reflective plates 11 are distributed in a staggered manner. Specifically, the vertical direction of the flanges of the two adjacent layers of the first reflection plates 11 is coplanar.
In one embodiment, the bottom end of the screen box 1 is provided with a material outlet 5, and preferably, the material outlet 5 and the material distribution device 2 are arranged opposite to each other in the vertical direction. In order to realize uniform blanking, preferably, the inner channel of the material outlet 5 is provided with a second reflecting plate 6, and the second reflecting plate 6 has a structure which can be the same as that of the first reflecting plate 11, and preferably, two adjacent layers of the second reflecting plates 6 are distributed in a staggered manner in the vertical direction.
The screen box 1 is provided with an air suction opening 14 and an air inlet, specifically, preferably, the air suction opening 14 is arranged at the top end of the screen box 1 or at two opposite sides of the vertical surface of the screen box 1, and the number of the air suction openings 14 can be one or at least two.
The fluidization plate is provided with air outlet sieve pores blown out by air sent from the air supply device, and the air inlet guides the air sent from the air supply device to the air outlet sieve pores. In order to facilitate uniform air outlet, preferably, the air outlet sieve holes are arranged on the fluidization plate in an array manner, and specifically, the air outlet sieve holes can be arranged in a matrix manner. Preferably, the air outlet sieve pore is of a circular pore structure. The fluidization plate body can be of a flat plate structure and can also be arranged in other forms according to actual needs. Specifically, the fluidization plate can be a silicon carbide porous plate or a punching plate for directly processing an air outlet sieve pore.
As shown in fig. 6, the fluidization plate may be a pipe orifice plate protruding from the air outlet end, specifically, the fluidization plate includes a pipe plate 16 and an air duct 15 installed on the pipe plate 16, an air outlet sieve hole is formed inside the air duct 15, the air duct 15 is fixedly connected with the pipe plate 16, the air duct 15 is preferably a branch pipe, and is a round pipe, which is convenient for processing the air duct 15.
In order to prolong the service life of the fluidization plate, preferably, the air inlet surface and the air outlet surface of the fluidization plate are both provided with an anti-abrasion device. Specifically, the air inlet face and the air outlet face of the fluidization plate are both provided with an anti-abrasion layer.
As shown in fig. 3, in a specific embodiment, the fluidization plate includes a first fluidization plate 3 disposed obliquely, an air outlet mesh is disposed on the first fluidization plate 3, specifically, an included angle between the first fluidization plate 3 and a horizontal plane is an acute angle, specifically, an included angle between the first fluidization plate 3 and the horizontal plane is 45 °, the number of the first fluidization plate 3 is at least one, a top end of the first fluidization plate 3 is directly opposite to an outlet of the distributing device 2, and a bottom end of the first fluidization plate 3 is disposed far away from the distributing device 2 relative to a bottom end of the first fluidization plate 3. Preferably, the number of the first fluidization plates 3 is at least two.
Preferably, the number of the first fluidization plates 3 is two, the two first fluidization plates 3 are arranged in an inverted V shape, the top ends of the two first fluidization plates 3 are connected to form a tip end of the inverted V-shaped structure, and the tip end formed by the two first fluidization plates 3 is opposite to the outlet center of the distributing device 2. Preferably, the two first fluidization plates 3 are arranged symmetrically at an angle. In particular, two first fluidization plates 3 may be arranged vertically.
As shown in fig. 3, in an embodiment, the air screen further includes a first air intake chamber 12 connected with the bottom edge of the first fluidization plate 3 in a sealing manner and formed with the air intake surface of the first fluidization plate 3, and the air intake includes a first air intake 10 for delivering air to the first air intake chamber 12. The first air inlet 10 is located at the lower part of the first air inlet chamber 12, and the connection position of the first air inlet 10 may be a flange structure. High-pressure gas is input into the first air inlet chamber 12 through the first air inlet 10, so that the gas is uniformly discharged from each air outlet sieve hole on the first fluidization plate 3.
In a specific embodiment, preferably, the fluidization plate further includes a second fluidization plate 4 disposed in an inclined manner, an air outlet sieve hole is formed in the second fluidization plate 4, the second fluidization plate 4 is disposed below the first fluidization plate 3, the second fluidization plate 4 is at least one, the bottom end of the second fluidization plate 4 is disposed near the outlet below the distributing device 2, and the top end of the second fluidization plate 4 is disposed far away from the distributing device 2 relative to the bottom end of the second fluidization plate 4. Preferably, the number of the second fluidization plates 4 is at least two.
Specifically, the number of the second fluidization plates 4 is two, the two second fluidization plates 4 are in an inverted splayed shape, a material outlet 5 is formed between the bottom ends of the two second fluidization plates 4, the top ends of the two second fluidization plates 4 are connected with the side wall of the sieve box 1 in a sealing mode to form two second air inlet chambers 13 which are independently arranged, and the air inlet comprises a second air inlet 9 used for conveying air to the second air inlet chambers 13. Preferably, the first fluidization plate 3 and the second fluidization plate 4 are arranged vertically.
In a specific embodiment, the second air inlets 9 are disposed on the bottom wall of the sieve box 1, the number of the second air inlets 9 is two, the two second air inlets 9 correspond to the second fluidization plate 4 one by one, the second air inlet chamber 13 may be two independent cavities, and the second air inlets 9 correspond to the second air inlet chamber 13 one by one.
Specifically, the air outlet sieve pores on the first fluidization plate 3 and the second fluidization plate 4 are arranged in an array, and the specifications of the air outlet sieve pores can be the same or different.
The wall surface opposite to the first air inlet chamber 12 on the screen box 1 is provided with a first access door 7, specifically, the first access door 7 can be one or at least two, preferably, the number of the first access door 7 and the first fluidization plate 3 is equal, and the access doors correspond to each other one by one. Specifically, the first access door 7 may be provided on the upper surface of the sieve box 1.
The wall surface of the screen box 1 right opposite to the second air inlet cavity 13 is provided with a second access door 8, specifically, the second access door 8 can be arranged on the vertical surface of the screen box 1, and preferably, the second access door 8 corresponds to the second air inlet cavity 13 one by one.
When the air screen works, activated carbon enters an inlet of the distributing device 2 from a discharge port of the vibrating screen, is limited in the middle of a first reflecting plate 11 of a first layer by the reflecting action of the first reflecting plate 11 of the first layer and enters a first reflecting plate 11 of a second layer, the first reflecting plate 11 of the second layer is composed of three independent reflecting plates, the activated carbon enters the first reflecting plate 11 of the second layer from the first reflecting plate 11 of the first layer, and is discharged from channels on two sides of the first reflecting plate 11 in the middle under the action of the first reflecting plates 11 in the middle and on two sides. Under the combined action of the first layer of first reflecting plate 11 and the second layer of first reflecting plate 11, the activated carbon which is uniformly distributed can be uniformly distributed in any direction from the feed inlet of the material distribution device 2, and the activated carbon which is uniformly distributed enters the fluidizing plate from the middle under the action of the third layer of first reflecting plate 11, so that the material is uniformly distributed to the first fluidizing plates 3 at two sides.
The active carbon uniformly enters the upper surface of the fluidization plate, specifically, the active carbon firstly enters the upper surface of the first fluidization plate 3, simultaneously, the fluidization air enters the first air inlet chamber 12 of the first fluidization plate 3 from the first air inlet 10, and is a uniform air curtain under the distribution of the first fluidization plate 3, and the active carbon is firstly fluidized to form a suspended fluidized bed. The air has a certain speed, the active carbon is supported by the uniform air curtain at a certain speed, the impact and the abrasion of the active carbon on the fluidization plate are reduced, the large-particle active carbon continuously flows downwards under the action of gravity and wind power according to the winnowing principle, the active carbon continuously rolls under the action of the air speed, and meanwhile, the active carbon is in strong contact and friction with the air flow, so that fine particles attached to the active carbon are separated from the surface and the pores of the active carbon. According to the principle of air segregation, after the ultrafine particles are separated from the activated carbon, the activated carbon powder with the fine particles is carried away by the airflow under the action of the air draft due to the difference of density and particle size. The active carbon through the first winnowing continues to flow downwards to enter the upper surface of the second disulfide plate, fluidized air enters the second air inlet chamber 13 of the second fluidization plate 4 from the two second air inlets 9, an even air curtain is formed under the distribution of the second fluidization plate 4, a certain speed is achieved, the active carbon is supported by the even air curtain at the certain speed, the active carbon powder with fine particles is further separated from the active carbon powder with large particles, and the active carbon is taken away by air flow under the action of air draft.
According to the principle of air separation, after the superfine particles are separated from the activated carbon, the superfine particles are taken out of the large particles of the activated carbon under the action of airflow due to the difference of density and particle size, so that the aim of separation is fulfilled.
In the air sieve that this application embodiment provided, activated carbon passes through distributing device 2 and gets into in sieve case 1, and the air current through fluidization plate exhaust realizes the superfine particle separation in the activated carbon, consequently, the air sieve that this application provided has got rid of the superfine particle in the activated carbon flue gas effectively.
The dust cleaning method further includes a roots blower 18 for supplying an air source to the air screen, or a high pressure air source may be supplied by compressed air.
As can be seen from the above description, in the dust purification method provided in the embodiment of the present application, the vibrating screen is arranged to remove small particles smaller than 1.2mm in the activated carbon, the air knife 17 is used to remove part of the fine dust remaining on the surface of the large-particle activated carbon at the rear stage of the vibrating screen, and the air screen at the outlet of the vibrating screen is used to deeply remove the fine dust remaining on the surface of the large-particle activated carbon, so that the dust purification method provided in the present application effectively reduces the dust emission concentration of the activated carbon flue gas purification.
The application provides a pair of dust purification device includes dust collection device, air knife 17, shale shaker and the air sieve of being connected with the shale shaker discharge gate, and dust collection device is used for collecting the dust of shale shaker and air sieve, and air knife 17 installs on the shale shaker. Specifically, the removed dust-containing gas is collected by a bag-type dust collector 19.
It can be known from the above description that the dust purification device that this application embodiment provided gets rid of the tiny particle that is less than 1.2mm in the active carbon through setting up the shale shaker, uses air knife 17 to get rid of the remaining part fine dust in large granule active carbon surface at the shale shaker back end, gets rid of the remaining fine dust in large granule active carbon surface through shale shaker export air screen degree of depth again, consequently, the dust purification device that this application provided has reduced active carbon flue gas purification's dust emission concentration effectively.
In particular, the vibrating screen is preferably provided with at least one row of air exhaust knives 17. Specifically, two rows of air knives 17 or at least three rows of air knives 17 may be provided.
Preferably, the air outlet of the air knife 17 is provided with a slotted nozzle 21. As shown in fig. 8, specifically, the outlet end of the slot nozzle 21 is a convex spherical surface, the outlet slots are arranged on the spherical surface in a strip shape, the spraying surface of the slot nozzle 21 forms a fan-shaped spraying surface 20, specifically, the fan-shaped spraying surface 20 is a fan shape with 30-90 degrees, and preferably, the center of the outlet slot coincides with the bottom end of the spherical surface. Through setting up fan-shaped spray face 20, the gas curtain angle is great, conveniently sweeps, and slot formula nozzle 21 can be dismantled the connection, specifically can be fixed through the spiro union, and slot formula nozzle 21's upper reaches can set up the filter screen, improves the quality of giving vent to anger, makes things convenient for slot formula nozzle 21 to install and change.
The air screen comprises a screen box 1, a fluidization plate arranged in the screen box 1 and a material distribution device 2 arranged at the top end of the screen box 1.
Specifically, the distributing device 2 comprises an outer barrel and a plurality of first reflecting plates 11 arranged in a feeding channel of the outer barrel, upward flanges are arranged on the edges of the first reflecting plates 11, a blanking channel is formed between every two adjacent first reflecting plates 11, the outer barrel can be of a square pipe body structure, preferably, the end portions of the first reflecting plates 11 on the edges are fixedly connected with the inner wall of the outer barrel, one end far away from the outer barrel is upward flanged to form an L-shaped structure, and two opposite ends of the first reflecting plates 11 in the middle position are provided with flanges to form a U-shaped structure.
As shown in fig. 4, preferably, the first reflective plates 11 are multiple, all the first reflective plates 11 are distributed in multiple layers from top to bottom, and the reflective plates of the adjacent two layers of the first reflective plates 11 are distributed in a staggered manner. Specifically, the vertical direction of the flanges of the two adjacent layers of the first reflection plates 11 is coplanar.
In one embodiment, the bottom end of the screen box 1 is provided with a material outlet 5, and preferably, the material outlet 5 and the material distribution device 2 are arranged opposite to each other in the vertical direction. In order to realize uniform blanking, preferably, the inner channel of the material outlet 5 is provided with a second reflecting plate 6, and the second reflecting plate 6 has a structure which can be the same as that of the first reflecting plate 11, and preferably, two adjacent layers of the second reflecting plates 6 are distributed in a staggered manner in the vertical direction.
The screen box 1 is provided with an air suction opening 14 and an air inlet, specifically, preferably, the air suction opening 14 is arranged at the top end of the screen box 1 or at two opposite sides of the vertical surface of the screen box 1, and the number of the air suction openings 14 can be one or at least two.
The fluidization plate is provided with air outlet sieve pores blown out by air sent from the air supply device, and the air inlet guides the air sent from the air supply device to the air outlet sieve pores. In order to facilitate uniform air outlet, preferably, the air outlet sieve holes are arranged on the fluidization plate in an array manner, and specifically, the air outlet sieve holes can be arranged in a matrix manner. Preferably, the air outlet sieve pore is of a circular pore structure. The fluidization plate body can be of a flat plate structure and can also be arranged in other forms according to actual needs. Specifically, the fluidization plate can be a silicon carbide porous plate or a punching plate for directly processing an air outlet sieve pore.
As shown in fig. 6, the fluidization plate may be a pipe orifice plate protruding from the air outlet end, specifically, the fluidization plate includes a pipe plate 16 and an air duct 15 installed on the pipe plate 16, an air outlet sieve hole is formed inside the air duct 15, the air duct 15 is fixedly connected with the pipe plate 16, the air duct 15 is preferably a branch pipe, and is a round pipe, which is convenient for processing the air duct 15.
In order to prolong the service life of the fluidization plate, preferably, the air inlet surface and the air outlet surface of the fluidization plate are both provided with an anti-abrasion device. Specifically, the air inlet face and the air outlet face of the fluidization plate are both provided with an anti-abrasion layer.
As shown in fig. 3, in a specific embodiment, the fluidization plate includes a first fluidization plate 3 disposed obliquely, an air outlet mesh is disposed on the first fluidization plate 3, specifically, an included angle between the first fluidization plate 3 and a horizontal plane is an acute angle, specifically, an included angle between the first fluidization plate 3 and the horizontal plane is 45 °, the number of the first fluidization plate 3 is at least one, a top end of the first fluidization plate 3 is directly opposite to an outlet of the distributing device 2, and a bottom end of the first fluidization plate 3 is disposed far away from the distributing device 2 relative to a bottom end of the first fluidization plate 3. Preferably, the number of the first fluidization plates 3 is at least two.
Preferably, the number of the first fluidization plates 3 is two, the two first fluidization plates 3 are arranged in an inverted V shape, the top ends of the two first fluidization plates 3 are connected to form a tip end of the inverted V-shaped structure, and the tip end formed by the two first fluidization plates 3 is opposite to the outlet center of the distributing device 2. Preferably, the two first fluidization plates 3 are arranged symmetrically at an angle. In particular, two first fluidization plates 3 may be arranged vertically.
As shown in fig. 3, in an embodiment, the air screen further includes a first air intake chamber 12 connected with the bottom edge of the first fluidization plate 3 in a sealing manner and formed with the air intake surface of the first fluidization plate 3, and the air intake includes a first air intake 10 for delivering air to the first air intake chamber 12. The first air inlet 10 is located at the lower part of the first air inlet chamber 12, and the connection position of the first air inlet 10 may be a flange structure. High-pressure gas is input into the first air inlet chamber 12 through the first air inlet 10, so that the gas is uniformly discharged from each air outlet sieve hole on the first fluidization plate 3.
In a specific embodiment, preferably, the fluidization plate further includes a second fluidization plate 4 disposed in an inclined manner, an air outlet sieve hole is formed in the second fluidization plate 4, the second fluidization plate 4 is disposed below the first fluidization plate 3, the second fluidization plate 4 is at least one, the bottom end of the second fluidization plate 4 is disposed near the outlet below the distributing device 2, and the top end of the second fluidization plate 4 is disposed far away from the distributing device 2 relative to the bottom end of the second fluidization plate 4. Preferably, the number of the second fluidization plates 4 is at least two.
Specifically, the number of the second fluidization plates 4 is two, the two second fluidization plates 4 are in an inverted splayed shape, a material outlet 5 is formed between the bottom ends of the two second fluidization plates 4, the top ends of the two second fluidization plates 4 are connected with the side wall of the sieve box 1 in a sealing mode to form two second air inlet chambers 13 which are independently arranged, and the air inlet comprises a second air inlet 9 used for conveying air to the second air inlet chambers 13. Preferably, the first fluidization plate 3 and the second fluidization plate 4 are arranged vertically.
In a specific embodiment, the second air inlets 9 are disposed on the bottom wall of the sieve box 1, the number of the second air inlets 9 is two, the two second air inlets 9 correspond to the second fluidization plate 4 one by one, the second air inlet chamber 13 may be two independent cavities, and the second air inlets 9 correspond to the second air inlet chamber 13 one by one.
Specifically, the air outlet sieve pores on the first fluidization plate 3 and the second fluidization plate 4 are arranged in an array, and the specifications of the air outlet sieve pores can be the same or different.
The wall surface opposite to the first air inlet chamber 12 on the screen box 1 is provided with a first access door 7, specifically, the first access door 7 can be one or at least two, preferably, the number of the first access door 7 and the first fluidization plate 3 is equal, and the access doors correspond to each other one by one. Specifically, the first access door 7 may be provided on the upper surface of the sieve box 1.
The wall surface of the screen box 1 right opposite to the second air inlet cavity 13 is provided with a second access door 8, specifically, the second access door 8 can be arranged on the vertical surface of the screen box 1, and preferably, the second access door 8 corresponds to the second air inlet cavity 13 one by one.
When the air screen works, active carbon enters from an inlet of the material distribution device 2 through a discharge port of the vibrating screen, the active carbon is limited in the middle of a first reflecting plate 11 of a first layer through the reflecting action of the first reflecting plate 11 of the first layer and enters a first reflecting plate 11 of a second layer, the first reflecting plate 11 of the second layer is composed of three independent reflecting plates, the active carbon enters the first reflecting plate 11 of the second layer from the first reflecting plate 11 of the first layer, and the active carbon is discharged from channels on two sides of the first reflecting plate 11 in the middle under the action of the first reflecting plates 11 in the middle and on two sides. Under the combined action of the first layer of first reflecting plate 11 and the second layer of first reflecting plate 11, the activated carbon which is uniformly distributed can be uniformly distributed in any direction from the feed inlet of the material distribution device 2, and the activated carbon which is uniformly distributed enters the fluidizing plate from the middle under the action of the third layer of first reflecting plate 11, so that the material is uniformly distributed to the first fluidizing plates 3 at two sides.
The active carbon uniformly enters the upper surface of the fluidization plate, specifically, the active carbon firstly enters the upper surface of the first fluidization plate 3, simultaneously, the fluidization air enters the first air inlet chamber 12 of the first fluidization plate 3 from the first air inlet 10, and is a uniform air curtain under the distribution of the first fluidization plate 3, and the active carbon is firstly fluidized to form a suspended fluidized bed. The air has a certain speed, the active carbon is supported by the uniform air curtain at a certain speed, the impact and the abrasion of the active carbon on the fluidization plate are reduced, the large-particle active carbon continuously flows downwards under the action of gravity and wind power according to the winnowing principle, the active carbon continuously rolls under the action of the air speed, and meanwhile, the active carbon is in strong contact and friction with the air flow, so that fine particles attached to the active carbon are separated from the surface and the pores of the active carbon. According to the principle of air segregation, after the ultrafine particles are separated from the activated carbon, the activated carbon powder with the fine particles is carried away by the airflow under the action of the air draft due to the difference of density and particle size. The active carbon through the first winnowing continues to flow downwards to enter the upper surface of the second disulfide plate, fluidized air enters the second air inlet chamber 13 of the second fluidization plate 4 from the two second air inlets 9, an even air curtain is formed under the distribution of the second fluidization plate 4, a certain speed is achieved, the active carbon is supported by the even air curtain at the certain speed, the active carbon powder with fine particles is further separated from the active carbon powder with large particles, and the active carbon is taken away by air flow under the action of air draft.
According to the principle of air separation, after the superfine particles are separated from the activated carbon, the superfine particles are taken out of the large particles of the activated carbon under the action of airflow due to the difference of density and particle size, so that the aim of separation is fulfilled.
In the air sieve that this application embodiment provided, activated carbon passes through distributing device 2 and gets into in sieve case 1, and the air current through fluidization plate exhaust realizes the superfine particle separation in the activated carbon, consequently, the air sieve that this application provided has got rid of the superfine particle in the activated carbon flue gas effectively.
On the basis of the above solutions, the dust purification device further comprises a roots blower 18 for providing an air source to the air screen, or a high-pressure air source can be provided by compressed air.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A method of purifying dust, comprising the steps of:
a1, removing particles of the activated carbon through a vibrating screen, wherein the vibrating screen is provided with an air knife (17);
a2, carrying out active carbon particle removal treatment by a winnowing dust removal process at the downstream of the vibrating screen;
and A3, collecting the removed dust of the vibrating screen and the air screen through a dust collecting device.
2. The dust purification method as claimed in claim 1, wherein in the step A2, the air separation dedusting process comprises an air screen for air separation dedusting.
3. The utility model provides a dust purification device, its characterized in that, including dust collection device, air knife (17), shale shaker and with the air sieve that the shale shaker discharge gate is connected, dust collection device is used for collecting the shale shaker with the dust of air sieve, install air knife (17) on the shale shaker.
4. A dust cleaning apparatus according to claim 3, wherein at least one row of the air knives (17) is provided on the vibration sieve.
5. A dust purification apparatus as claimed in claim 3, wherein the air screen comprises:
the screen box (1), wherein the screen box (1) is provided with an air suction opening (14) and an air inlet;
the fluidization plate is arranged in the screen box (1), air outlet screen holes blown out by air sent from the air supply device are distributed on the fluidization plate, and the air inlet guides the air sent from the air supply device to the air outlet screen holes;
the distributing device (2) is arranged at the top end of the screen box (1), and the air suction opening (14) is communicated with the dust collecting device.
6. The dust purification device according to claim 5, wherein the fluidization plate comprises a first fluidization plate (3) which is obliquely arranged and a first air inlet chamber (12) which is connected with the edge of the bottom end of the first fluidization plate (3) in a sealing manner and is formed on the lower surface of the first fluidization plate (3), the first fluidization plate (3) is provided with the air outlet screen holes, the number of the first fluidization plate (3) is at least one, the top end of the first fluidization plate (3) is opposite to the outlet of the distribution device (2), and the bottom end of the first fluidization plate (3) is arranged far away from the distribution device (2) relative to the top end of the first fluidization plate (3);
the air inlet comprises a first air inlet (10) used for conveying air to the first air inlet chamber (12);
the first fluidization plates (3) are arranged in an inverted V shape, the top ends of the first fluidization plates (3) are connected to form the pointed end of the inverted V-shaped structure, and the pointed end formed by the first fluidization plates (3) is opposite to the outlet center of the distributing device (2).
7. The dust purification device according to claim 6, wherein the fluidization plate further comprises a second fluidization plate (4) obliquely arranged, the second fluidization plate (4) is provided with the air outlet mesh, the second fluidization plate (4) is arranged below the first fluidization plate (3), the number of the second fluidization plate (4) is at least one, the bottom end of the second fluidization plate (4) is arranged close to the lower part of the outlet of the distribution device (2), and the top end of the second fluidization plate (4) is arranged far away from the distribution device (2) relative to the bottom end of the second fluidization plate (4); the number of the second fluidization plates (4) is two, the two second fluidization plates (4) are arranged in an inverted splayed shape, a material outlet (5) is formed between the bottom ends of the two second fluidization plates (4), the top ends of the two second fluidization plates (4) are hermetically connected with the side wall, opposite to the sieve box (1), of the sieve box to form two second air inlet chambers (13) which are independently arranged, and the air inlet comprises a second air inlet (9) used for conveying air to the second air inlet chambers (13);
second air intake (9) set up the diapire of sieve case (1), sieve case (1) go up with first air inlet cavity (12) just right wall is equipped with first access door (7), sieve case (1) go up with second air inlet cavity (13) just right wall is equipped with second access door (8).
8. The dust purification device according to claim 6, wherein the distributing device (2) comprises an outer cylinder and a plurality of first reflecting plates (11) arranged in a feeding channel of the outer cylinder, the edges of the first reflecting plates (11) are provided with upturned edges, and a blanking channel is formed between two adjacent first reflecting plates (11);
first reflecting plate (11) are a plurality of, all first reflecting plate (11) are the multilayer distribution from top to bottom, and adjacent two-layer first reflecting plate (11) staggered distribution.
9. The dust purification device of claim 5, wherein the fluidization plate is a silicon carbide porous plate, a punching plate or a pipe orifice plate with a protruded gas outlet end.
10. Dust cleaning apparatus according to any of the claims 3-9, further comprising a roots blower (18) for providing a gas source to the wind screen.
CN202010250237.0A 2020-04-01 2020-04-01 Dust purification method and dust purification device Pending CN111420648A (en)

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Application Number Priority Date Filing Date Title
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CN112156984A (en) * 2020-09-21 2021-01-01 中冶南方都市环保工程技术股份有限公司 Active coke recycling separation system and separation method
CN113941216A (en) * 2020-07-17 2022-01-18 中冶长天国际工程有限责任公司 Centrifugal type active carbon dust purification system and purification method thereof

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CN109454001A (en) * 2018-12-11 2019-03-12 河南威猛振动设备股份有限公司 A kind of vibration winnowing device
CN109622373A (en) * 2019-01-31 2019-04-16 武汉华柏环保科技有限公司 A kind of activated carbon capillary ultrafine dust wind screening device

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JP2001276568A (en) * 2000-03-31 2001-10-09 Hitachi Zosen Corp Method for removing organic harmful matter in exhaust gas
CN101318180A (en) * 2008-07-22 2008-12-10 苏州宝化炭黑有限公司 Hydrocarbon black powder removing method and device
CN104249059A (en) * 2013-06-25 2014-12-31 湖北叶威粮油机械有限公司 Cleaning sieve
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CN113941216A (en) * 2020-07-17 2022-01-18 中冶长天国际工程有限责任公司 Centrifugal type active carbon dust purification system and purification method thereof
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CN112156984A (en) * 2020-09-21 2021-01-01 中冶南方都市环保工程技术股份有限公司 Active coke recycling separation system and separation method

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Application publication date: 20200717