CN112893137B - System and method for separating regenerated active carbon dust - Google Patents
System and method for separating regenerated active carbon dust Download PDFInfo
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- CN112893137B CN112893137B CN202110336580.1A CN202110336580A CN112893137B CN 112893137 B CN112893137 B CN 112893137B CN 202110336580 A CN202110336580 A CN 202110336580A CN 112893137 B CN112893137 B CN 112893137B
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- 239000000428 dust Substances 0.000 title claims abstract description 295
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 22
- 239000003245 coal Substances 0.000 claims abstract description 25
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 230000008929 regeneration Effects 0.000 claims abstract description 18
- 238000011069 regeneration method Methods 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims description 13
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 239000011362 coarse particle Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 12
- 238000001179 sorption measurement Methods 0.000 abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 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
- 230000018109 developmental process Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- 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
- 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
- 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
- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/20—Feeding/conveying devices
- F23K2203/201—Feeding/conveying devices using pneumatic means
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combined Means For Separation Of Solids (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses an active carbon regeneration dust separation system and a method, wherein the system comprises a blanking channel and a dust bin, the blanking channel is obliquely arranged, and the dust bin is vertically arranged; the top end of the blanking channel is provided with a high-temperature feeding hole, the blanking channel is communicated with the dust bin, a dust screen is arranged at the communication part of the blanking channel and the dust bin, and the lower end of the blanking channel is communicated with the bin; the lower end of the dust bin is provided with a fine dust recoverer, the lower part of the fine dust recoverer is provided with an air inlet which is communicated with an outlet of the air blower, the fine dust recoverer is provided with a dust-containing air outlet, and the lower end of the fine dust recoverer is provided with a dust falling port; a coarse and fine dust separating baffle is arranged in the middle part of the fine dust recoverer cavity; an outlet of the blanking channel is communicated with an inlet of the induced draft fan, a dust-containing air outlet and an outlet of the induced draft fan are communicated with a rear primary air pipeline of a coal mill of the power plant, the device is simple in structure, dust and powder generated in the adsorption and regeneration processes of active carbon can be effectively separated, separation efficiency is high, high-temperature dust and powder after separation can be reused, energy and materials are saved, and the device is clean and environment-friendly on site.
Description
Technical Field
The invention belongs to the technical field of flue gas pollutant purification, and particularly relates to an active carbon regeneration dust separation system and method.
Background
The utilization of coal by direct combustion will produce a large amount of acid waste gas pollutants, such as smoke dust, SO 2 NOx, etc., seriously affect the balance of ecological environment and the physical health of people. The main component of NOx is NO, and also contains a small amount of NO 2 . At present, the mainstream flue gas purification technology adopts the combination of SCR denitration, ESP electric precipitation and FGD wet desulfurization to carry out desulfurization and denitration and dust removal.
The traditional flue gas desulfurization and denitration adopts a separate treatment method, and has the disadvantages of huge equipment, complex technology and high cost although certain results are achieved, thus greatly influencing the development of a thermal power plant. For example, FGD wet desulfurization technology occupies a large area, needs a large amount of limestone as an auxiliary absorbent, and has the disadvantages of easy corrosion and scaling of the inner wall of equipment and high maintenance difficulty. The SCR denitration technology has high initial investment cost, needs to continuously consume ammonia or urea as a reducing agent, is easy to poison and lose efficacy, has high treatment difficulty and high operation cost. The existing novel high-efficiency low-temperature integrated flue gas pollutant removal technology solves the problems, but in the adsorption and regeneration process of the activated carbon, a large amount of dust powder can be generated along with the adsorption regeneration cycle of the flowing activated carbon adsorbent, the dust powder is doped in the activated carbon adsorbent, so that the pipeline resistance is increased, the blockage is easy, in addition, under the high-temperature oxygen-containing regeneration atmosphere, the activated carbon powder is easier to catch fire, the activated carbon loss is caused, and the potential safety hazard of a system exists. Therefore, dust generated in the adsorption and regeneration processes of the activated carbon needs to be effectively separated, so that the activated carbon adsorbent can be safely and efficiently recycled.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the active carbon regeneration dust separation system and the method, the device has a simple structure, dust generated in the adsorption and regeneration processes of the active carbon can be effectively separated, the separation efficiency is high, the separated dust can be reused, the energy and the materials are saved, and the operation site is clean and environment-friendly.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: an active carbon regeneration material dust separation system comprises a blanking channel and a dust bin, wherein the blanking channel is obliquely arranged, and the dust bin is vertically arranged; the top end of the blanking channel is provided with a high-temperature feed inlet, the blanking channel is communicated with the dust bin, a dust screen is arranged at the communication part of the blanking channel and the dust bin, the lower end of the blanking channel is communicated with the bin, and the dust screen is arranged along the channel wall of the blanking channel; the lower end of the dust bin is provided with a fine dust recoverer, the lower part of the fine dust recoverer is provided with an air inlet, the air inlet is communicated with an outlet of a blower, the fine dust recoverer is provided with a dust-containing air outlet, the dust-containing air outlet is communicated with a primary air pipeline behind a coal mill of the power plant, the lower end of the fine dust recoverer is connected with a dust falling valve, and the lower end of the dust falling valve is provided with a dust falling opening; a coarse and fine dust separating baffle is arranged in the middle part of the fine dust recoverer cavity; an outlet of the blanking channel is communicated with an inlet of the induced draft fan, an outlet of the induced draft fan is communicated with a primary air pipeline behind a coal mill of the power plant, and an air inlet faces the center of the fine dust recoverer.
The coarse and fine dust separating baffle is arranged on the outer side of the blanking pipe of the fine dust recoverer, the flow area of the coarse and fine dust separating baffle is gradually reduced from top to bottom, and the periphery of the upper end of the coarse and fine dust separating baffle is provided with downward bends.
The distance between the coarse and fine dust separating baffles and the outer side of the blanking pipe of the fine dust recoverer is 10-20cm, and the distance between the position with the largest diameter of the coarse and fine dust separating baffles and the inner wall of the fine dust recoverer is 5-30cm.
The dust distributor is arranged below the coarse and fine dust and powder separation baffle and comprises vertical partition plates, the vertical partition plates are arranged at equal interval angles in the vertical direction, and the number of the intervals is the same as that of the air inlets.
The dust-containing air outlets are formed in the top end of the fine dust recoverer, and the number of the dust-containing air outlets is the same as that of the air inlets.
A screen is arranged at the dust-containing air outlet or at the top end of the coarse and fine dust powder separation baffle, and the specification of the screen is 4-12 meshes;
the dust screen is a pluggable screen, and the specification of the dust screen is 8 meshes, 10 meshes, 12 meshes or 14 meshes.
A feeding baffle plate is arranged below the high-temperature feeding hole, one end of the feeding baffle plate is connected with the blanking channel, the other end of the feeding baffle plate is a suspended end, and a blanking gap is reserved between the suspended end and the dust screen.
The lower end of the feed bin is communicated with the blanking port, and a blanking valve is arranged between the lower end of the feed bin and the blanking port.
According to the method for separating the regenerated active carbon dust based on the system, the regenerated active carbon enters a blanking channel, dust is separated from the active carbon under the actions of blanking vibration and negative pressure, the active carbon enters a bin, and the dust enters a dust bin;
negative pressure is applied to the blanking channel, and raised dust generated in the process of blanking the activated carbon is conveyed to a rear primary air pipeline of a coal mill of a power plant from the blanking channel under the action of negative pressure air flow;
the dust enters a fine dust recoverer through a dust bin to be subjected to coarse-fine separation, and the fine dust is conveyed to a primary air pipeline behind a coal mill of a power plant and is mixed with dust airflow of an induced draft fan to enter a hearth boiler for combustion.
The dust is subjected to coarse-fine separation in a fine dust recoverer, the fine dust recoverer is subjected to air inlet from bottom to top, the separated fine powder is blown out from a dust-containing air outlet along with air flow, and the separated coarse particles are removed from a dust falling port from the lower end of the fine dust recoverer.
Compared with the prior art, the invention has at least the following beneficial effects:
according to the invention, the regenerated active carbon dust is effectively separated, the separated active carbon dust is recovered, the separated dust enters the fine dust recoverer through the dust bin, the fine dust is separated in a coarse and fine mode under the action of the blower and the coarse and fine dust separation baffle, the fine dust is blown out from the dust-containing air outlet under the drive of the air flow, the fine dust is directly sent to the coal mill, and finally enters the boiler through the rear primary air pipeline, and the raised dust in the blanking process is sent to the coal mill, and finally enters the boiler through the rear primary air pipeline under the action of the induced draft fan.
Further, the coarse and fine dust separating baffle is arranged on the outer side of the blanking pipe of the fine dust recoverer, the flow area of the coarse and fine dust separating baffle is gradually reduced from top to bottom, a circle of the upper end of the coarse and fine dust separating baffle is provided with downward bending, fine powder is output from the dust-containing air outlet along a gap on the side surface of the coarse and fine dust separating baffle under the action of air flow, coarse particles are blocked at the fine dust recoverer by the coarse and fine dust separating baffle, and fall into a dust dropping port below the fine dust recoverer at the bottom.
Further, the feeding baffle is arranged below the high-temperature feeding hole, one end of the feeding baffle is connected with the blanking channel, the other end of the feeding baffle is a suspended end, a blanking gap is reserved between the suspended end and the dust screen, so that the activated carbon falls down along the dust screen, and the activated carbon is fully separated from the dust.
According to the method, the active carbon dust subjected to high-temperature regeneration is effectively separated, the separated high-temperature dust is directly conveyed to a secondary air pipeline of a coal mill to enter a furnace for combustion through a blower and a fine dust recoverer, and the raised dust in the blanking process is also conveyed to the secondary air pipeline of the coal mill to enter the furnace for combustion through a draught fan.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
FIG. 2 is a schematic diagram of a dust screen that may be implemented.
Wherein, 1 is the air-blower, 2 is the draught fan, 3 is the material dirt screen cloth, 4 is the material dirt screen cloth handle, 5 is thick and thin dirt separation baffle, 6 is the dust distributor, 7 is the high temperature feed inlet, 8 is the blanking mouth, 9 is the dust fall mouth, 10 is the blanking valve, 11 is the dust fall valve, 12 is the air intake, 13 is the air outlet, 14 is the feeding baffle, 15 is the feed bin, 16 is the dust bin, 17 is the blanking passageway, 18 is the thin dirt recoverer, 19-thin dirt recoverer blanking pipe.
Detailed Description
The invention will be described in more detail below with reference to the drawings and the detailed description.
Referring to the drawings, an active carbon regeneration material dust separation system comprises a blanking channel 17 and a dust bin 16, wherein the blanking channel 17 is obliquely arranged, the dust bin 16 is vertically arranged, the top end of the blanking channel 17 is a high-temperature feed port 7, the blanking channel 17 is communicated with the dust bin 16, a material dust screen 3 is arranged at the communication position of the blanking channel 17 and the dust bin 16, the upper end of the material dust screen 3 is connected with the blanking channel 17, the lower end of the blanking channel 17 is communicated with a storage bin 15, the lower end of the storage bin 15 is communicated with a blanking port 8, and a blanking valve 10 is arranged between the lower end of the storage bin 15 and the blanking port 8; a blanking channel 17 is arranged above the dust screen 3, a dust bin 16 is arranged below the dust screen 3, the lower end of the dust bin 16 is connected with a fine dust recoverer 18, an air inlet 12 is formed in the lower part of the fine dust recoverer 18, the air inlet 12 is communicated with the outlet of the blower 1, a dust-containing air outlet 13 is formed in the fine dust recoverer 18, the dust-containing air outlet 13 is communicated with a primary air pipeline behind a coal mill of a power plant, the lower end of the fine dust recoverer 18 is connected with a dust falling valve 11, and the lower end of the dust falling valve 11 is provided with a dust falling opening 9; the middle part in the cavity of the fine dust recoverer 18 is provided with a coarse and fine dust separating baffle 5, and a dust distributor 6 is arranged below the coarse and fine dust separating baffle 5.
The feeding baffle 14 is arranged below the high-temperature feeding hole 7, one end of the feeding baffle 14 is connected with the blanking channel 17, the other end is a suspended end, and a blanking gap is reserved between the suspended end and the dust screen 3, so that the activated carbon falls down along the dust screen 3, and the activated carbon is fully separated from dust.
The feed baffle 14 is a rigid plate, preferably a steel plate.
An outlet of the blanking channel 17 is communicated with an inlet of the induced draft fan 2, the induced draft fan 2 enables the blanking channel 17 to generate negative pressure air flow, raised dust in the blanking channel 17 is carried out, an outlet of the induced draft fan 2 is communicated with a rear primary air pipeline of a coal mill of a power plant, and the air flow of the induced draft fan 2 and the air flow of the dust-containing air outlet 13 are mixed and then enter the rear primary air pipeline of the coal mill of the power plant.
The coarse and fine dust separating baffle 5 is arranged outside the blanking pipe 19 of the fine dust recoverer, the flow area of the coarse and fine dust separating baffle 5 is gradually reduced from top to bottom, and the upper end of the coarse and fine dust separating baffle 5 is provided with downward bending at one circle.
The distance between the coarse and fine dust separating baffle 5 and the outer side of the blanking pipe 19 of the fine dust recoverer is 10-20cm, and the distance between the position with the largest diameter of the coarse and fine dust separating baffle 5 and the inner wall of the fine dust recoverer 18 is 5-30cm.
As an alternative embodiment, the coarse and fine dust separating baffles 5 are connected to the fine dust collector blanking pipe 19 by transverse links, or the coarse and fine dust separating baffles 5 are connected to the fine dust collector 18 side walls by transverse links.
The dust distributor 6 comprises a plurality of partition boards which are arranged at equal intervals in the circumferential direction, namely the partition boards equally divide a cylinder where the partition boards are positioned into a plurality of equal parts; as an example: when the partition plates are two, the partition plates are separated by 180 degrees, and the dust distributor 6 divides the lower part of the fine dust recoverer 18 into two halves; when the number of the partition boards is three, the partition boards are separated by 120 degrees, and the dust distributor 6 divides the lower part of the fine dust recoverer 18 into three parts; when the number of the partition plates is four, the partition plates are separated by 90 degrees, and the dust distributor 6 divides the lower part of the fine dust recoverer 18 into four parts; of course, the lower part of the equally divided fine dust recoverer 18 is an open space, and the dust distributor 6 can make the dust fall more uniform.
The lower part of the fine dust recoverer 18 is funnel-shaped, the upper part is straight barrel-shaped, and the lower part of the fine dust recoverer 18 is provided with at least two air inlets 12.
The angle between the axis of the blanking channel 17 and the axis of the dust bin 16 is an acute angle, and in the process that the active carbon rapidly rolls down to the bin 15 through the blanking channel 17, the dust falls down to the dust bin 16 from the dust screen 3 under the action of vibration and wind blowing.
A screen mesh can be arranged at the dust-containing air outlet 13, and the screen mesh is arranged in one-to-one correspondence with the dust-containing air outlet 13;
the top end of the coarse and fine dust separating baffle 5 can be provided with a screen, the screen is in a circular ring, the screen can be connected with the top end of the coarse and fine dust separating baffle 5, and also can be connected and installed through the inner wall of the fine dust recoverer 18, and the screen is 4-12 meshes in specification.
Referring to fig. 2, a dust screen handle 4 is arranged at the upper end of the dust screen 3, the dust screen 3 is in a drawing type, a dust screen groove is arranged on a blanking channel 17, and the dust screen 3 is installed through the dust screen groove, so that replacement is convenient.
The inlet of the induced draft fan 2 is connected with the upper section of the blanking channel 17, and the outlet of the induced draft fan 2 is connected with the outlet pipeline of the dust-containing air outlet 13 and then goes to the back primary air pipeline of the coal mill of the power plant.
The technological process and principle of the invention are as follows:
the novel high-efficiency low-temperature integrated flue gas pollutant removal technology is characterized in that activated carbon is used for adsorbing pollutants in flue gas under a low-temperature working condition, the adsorbed activated carbon needs to be heated and regenerated, the regenerated and cooled activated carbon can be reused, and the system is connected to an outlet of the regenerated activated carbon at a high temperature.
The activated carbon regenerated at the temperature of 250+/-20 ℃ enters an activated carbon regeneration dust separation system from a feed inlet 7, part of the activated carbon after feeding falls on a feed baffle 14, then slides into a dust screen 3 from the feed baffle 14, the activated carbon screened by the dust screen 3 falls down through a blanking channel 17 and enters a feed bin 15, a blanking valve 10 is arranged at the lower end of the feed bin 15, and the material enters a subsequent cooling section from a blanking port 8 through the blanking valve 10.
The screened dust enters into a dust bin 16, the lower end of the dust bin 16 is connected with a fine dust recoverer 18, the dust falls into the fine dust recoverer 18 from the lower end of the dust bin 16, the dust falls down through the dust distributor 6 in an even distribution manner, air is blown in through an air inlet 12 by a blower 1, the air containing coarse and fine dust is separated by a coarse and fine dust separation baffle 5, the coarse dust falls down, and the fine dust is blown out from a dust-containing air outlet 13.
When the material is blanked in the blanking channel 17, a large amount of dust can be generated, the inlet of the induced draft fan 2 is connected with the upper section of the blanking channel 17, the outlet of the induced draft fan 2 is connected with the outlet pipeline of the dust-containing air outlet 13, and then the material is sent to the back primary air pipeline of the coal mill of the power plant and is sent to the boiler for combustion.
According to the method for separating the activated carbon reclaimed dust based on the system, after the temperature of the activated carbon subjected to high-temperature pyrolysis is reduced, the activated carbon is sent into the blanking channel 17, dust is separated from the activated carbon under the action of blanking vibration, the activated carbon enters the storage bin 15, the dust enters the dust bin 16, and raised dust generated in the blanking process of the activated carbon is conveyed to a rear primary air pipeline of a coal mill of a power plant from the blanking channel 17 by adopting air flow generated by the induced draft fan 2; the dust entering the dust bin 16 is subjected to coarse-fine separation, fine dust is conveyed to a primary air pipeline after a coal mill of a power plant, and is mixed with dust airflow of the induced draft fan 2 to enter a hearth boiler for combustion, so that activated carbon is not affected by the dust, the activated carbon is recovered, and meanwhile, the dust is recovered and reused.
The lower part of the dust screen 3 is connected with a dust bin 16, the lower end of the dust bin 16 is connected with a fine dust recoverer 18, the fine dust recoverer 18 comprises a dust-containing air outlet 13, a coarse and fine dust separating baffle 5, a dust distributor 6, an air inlet 12, the lower end of the fine dust recoverer 18 is connected with a dust falling valve 11, and the lower end of the dust falling valve 11 is provided with a dust falling port 9.
The air inlet 12 of the fine dust recoverer 18 is connected with the outlet of the blower 1, and the dust-containing air outlet 13 of the fine dust recoverer 18 is connected with a rear primary air pipeline of a coal mill of the power plant.
The inlet of the induced draft fan 2 is connected with the upper section of the blanking channel 17, and the outlet of the induced draft fan 2 is connected with the outlet pipeline of the dust-containing air outlet 13 and then goes to the back primary air pipeline of the coal mill of the power plant.
According to the invention, the active carbon dust subjected to high-temperature regeneration is effectively separated, the separated active carbon dust is sent to the cooling tower for cooling, the separated high-temperature dust is directly sent to the rear primary air pipeline of the coal mill for combustion through the blower and the fine dust recoverer, the raised dust in the blanking process is also sent to the rear primary air pipeline of the coal mill for combustion through the induced draft fan, the device has a simple structure, dust generated in the adsorption and regeneration processes of the active carbon can be effectively separated, the separation efficiency is high, the separated high-temperature dust can be reused, the energy and the materials are saved, and the operation site is clean and environment-friendly.
Claims (4)
1. The active carbon regeneration dust separating system is characterized by comprising a blanking channel (17) and a dust bin (16), wherein the blanking channel (17) is obliquely arranged, and the dust bin (16) is vertically arranged; the top end of the blanking channel (17) is a high-temperature feed inlet (7), the blanking channel (17) is communicated with the dust bin (16), a dust screen (3) is arranged at the communication part of the blanking channel (17) and the dust bin (16), the lower end of the blanking channel (17) is communicated with the storage bin (15), and the dust screen (3) is arranged along the channel wall of the blanking channel (17); the lower end of the dust bin (16) is provided with a fine dust recoverer (18), the lower part of the fine dust recoverer (18) is provided with an air inlet (12), the air inlet (12) is communicated with the outlet of the air blower (1), the fine dust recoverer (18) is provided with a dust-containing air outlet (13), the dust-containing air outlet (13) is communicated with a primary air pipeline behind a coal mill of the power plant, the lower end of the fine dust recoverer (18) is connected with a dust falling valve (11), and the lower end of the dust falling valve (11) is provided with a dust falling port (9); a coarse and fine dust separating baffle (5) is arranged in the middle part of the cavity of the fine dust recoverer (18); an outlet of the blanking channel (17) is communicated with an inlet of the induced draft fan (2), an outlet of the induced draft fan (2) is communicated with a rear primary air pipeline of a coal mill of the power plant, and an air inlet (12) faces to the center of the fine dust recoverer (18); the coarse and fine dust separating baffle (5) is arranged at the outer side of the blanking pipe (19) of the fine dust recoverer, the flow area of the coarse and fine dust separating baffle (5) is gradually reduced from top to bottom, and the periphery of the upper end of the coarse and fine dust separating baffle (5) is provided with downward bends; a feeding baffle (14) is arranged below the high-temperature feeding hole (7), one end of the feeding baffle (14) is connected with a blanking channel (17), the other end is a suspension end, and a blanking gap is reserved between the suspension end and the dust screen (3); the distance between the coarse and fine dust separating baffle (5) and the outer side of the blanking pipe (19) of the fine dust recoverer is 10-20cm, and the distance between the maximum diameter position of the coarse and fine dust separating baffle (5) and the inner wall of the fine dust recoverer (18) is 5-30cm; a dust distributor (6) is arranged below the coarse and fine dust and powder separation baffle (5), the dust distributor (6) comprises vertical partition plates, the vertical partition plates are arranged at equal interval angles in the vertical direction, and the number of the intervals is the same as that of the air inlets (12); a screen is arranged at the dust-containing air outlet (13) or at the top end of the coarse and fine dust separating baffle (5), and the specification of the screen is 4-12 meshes; the dust screen (3) is a pluggable screen, and the specification of the dust screen (3) is 8 meshes, 10 meshes, 12 meshes or 14 meshes.
2. The activated carbon regeneration dust separation system according to claim 1, wherein dust-containing air outlets (13) are formed at the top end of the fine dust recoverer (18), and the number of the dust-containing air outlets (13) is the same as the number of the air inlets (12).
3. The activated carbon regeneration dust separation system according to claim 1, wherein the lower end of the bin (15) is communicated with the blanking port (8), and a blanking valve (10) is arranged between the lower end of the bin (15) and the blanking port (8).
4. A method for separating regenerated dust from activated carbon based on the system of any one of claims 1 to 3, characterized in that the regenerated activated carbon enters a blanking channel (17), dust is separated from the activated carbon under the action of blanking vibration and negative pressure, the activated carbon enters a bin (15), and the dust enters a dust bin (16);
negative pressure is applied to the blanking channel (17), and flying dust generated in the active carbon blanking process is conveyed to a rear primary air pipeline of the coal mill of the power plant from the blanking channel (17) under the action of negative pressure air flow;
the dust enters a dust bin (16) and enters a fine dust recoverer (18) for coarse-fine separation, and the fine dust is conveyed to a primary air pipeline behind a coal mill of a power plant and mixed with dust airflow of an induced draft fan (2) to enter a hearth boiler for combustion; the dust is coarsely and finely separated in a fine dust recoverer (18), the fine dust recoverer (18) is used for air inlet from bottom to top, the separated fine powder is blown out from a dust-containing air outlet (13) along with air flow, and the separated coarse particles are removed from a dust falling port (9) from the lower end of the fine dust recoverer (18).
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