CN112893137A - Activated carbon regeneration material dust separation system and method - Google Patents
Activated carbon regeneration material dust separation system and method Download PDFInfo
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- CN112893137A CN112893137A CN202110336580.1A CN202110336580A CN112893137A CN 112893137 A CN112893137 A CN 112893137A CN 202110336580 A CN202110336580 A CN 202110336580A CN 112893137 A CN112893137 A CN 112893137A
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- fine dust
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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 88
- 239000000463 material Substances 0.000 title claims abstract description 54
- 238000000926 separation method Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008929 regeneration Effects 0.000 title claims abstract description 23
- 238000011069 regeneration method Methods 0.000 title claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 23
- 239000003245 coal Substances 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 239000003575 carbonaceous material Substances 0.000 claims description 4
- 239000011362 coarse particle Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 238000011084 recovery Methods 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
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 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
- 230000002378 acidificating effect Effects 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
- 238000005452 bending Methods 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
- 239000003054 catalyst Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration 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
- 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
Images
Classifications
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- 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
Abstract
The invention discloses an active carbon regeneration material dust separation system and 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 material dust screen is arranged at the communication position 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, the air inlet 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 dust and fine dust separating baffle is arranged in the middle of the cavity of the fine dust recoverer; offer the entry of an export intercommunication draught fan on the blanking passageway, the export intercommunication power plant coal pulverizer back wind pipeline of dusty air outlet and draught fan, the device simple structure can effectively separate the dust powder that the active carbon produced in absorption and regeneration process, and separation efficiency is high, and the separation back high temperature dust powder can reuse, and is energy-conserving economize on material, the clean environmental protection of scene.
Description
Technical Field
The invention belongs to the technical field of flue gas pollutant purification, and particularly relates to an active carbon regeneration material dust separation system and method.
Background
The utilization mode of direct combustion of coal can generate a large amount of acidic waste gas pollutants, such as smoke dust and SO2NOx and the like seriously affect the balance of ecological environment and the physical health of people. NOx is mainly composed of NO and also contains a small amount of NO2. At present, the mainstream flue gas purification technology is to perform desulfurization, denitrification and dust removal by adopting the combination of SCR denitration, ESP electric precipitation and FGD wet desulphurization.
The traditional flue gas desulfurization and denitration adopt a separate treatment method, although a certain achievement is achieved, the equipment is huge, the technology is complex, the cost is overhigh, and great influence is caused to the development of a thermal power plant. For example, the FGD wet desulphurization technology occupies a large area, needs a large amount of limestone as an auxiliary absorbent, is easy to corrode and scale the inner wall of the equipment and has high maintenance difficulty. The SCR denitration technology has high initial investment cost, ammonia or urea needs to be continuously consumed as a reducing agent, an SCR catalyst is easy to be poisoned and invalid, the treatment difficulty is high, and the operation cost is high. Although the above-mentioned difficult problem has been solved to the integration flue gas pollutant desorption technique of current novel high-efficient low temperature, nevertheless in activated carbon adsorption and regeneration process, along with the adsorption regeneration circulation that the activated carbon adsorbent flows, can produce a large amount of dusts, the dust powder doping not only can increase the pipeline resistance in the activated carbon adsorbent, easily blocks up, and under the oxygen regeneration atmosphere of high temperature, activated carbon powder changes to catch fire in addition, causes the activated carbon loss, has the potential safety hazard of system. Therefore, there is a need for effectively separating dust generated during the adsorption and regeneration processes of activated carbon, so that the activated carbon adsorbent can be recycled safely and efficiently.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a system and a method for separating regenerated active carbon material dust, the device has a simple structure, can effectively separate dust generated in the adsorption and regeneration processes of the active carbon, has high separation efficiency, can reuse the separated dust, saves energy and materials, and is clean and environment-friendly in operation site.
In order to achieve the purpose, the invention adopts the technical scheme that: 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 feeding hole, the blanking channel is communicated with the dust bin, a material dust screen is arranged at the communication position of the blanking channel and the dust bin, the lower end of the blanking channel is communicated with the bin, and the material 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 an air 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 a 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; a coarse dust and fine dust separating baffle is arranged in the middle of the cavity of the fine dust recoverer; an outlet of the induced draft fan is communicated with a primary air pipeline behind a coal mill of a power plant, and an air inlet faces to the center of the fine dust recoverer.
The fine and fine dust separating baffle is arranged outside a blanking pipe of the fine dust collector, the flow area of the fine and fine dust separating baffle is gradually reduced from top to bottom, and downward bending is arranged on the upper end of the fine and fine dust separating baffle in a circle.
The distance between the thick and thin dust separating baffle and the outer side of the fine dust collector blanking pipe is 10-20cm, and the distance between the position with the largest diameter of the thick and thin dust separating baffle and the inner wall of the fine dust collector is 5-30 cm.
The dust distributor is arranged below the coarse and fine dust separating 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 arranged at 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 position of the dust-containing air outlet or at the top end of the coarse and fine dust separating baffle, and the size of the screen is 4-12 meshes;
the material dust screen is a pluggable screen, and the specification of the material dust screen is 8 meshes, 10 meshes, 12 meshes or 14 meshes.
A 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, and a blanking gap is reserved between the suspended end and the material dust screen.
The lower end of the stock bin is communicated with the blanking port, and a blanking valve is arranged between the lower end of the stock bin and the blanking port.
According to the method for separating the regenerated active carbon material dust based on the system, the regenerated active carbon enters the blanking channel, the dust is separated from the active carbon under the action of blanking vibration and negative pressure, the active carbon enters the material bin, and the dust enters the dust bin;
applying negative pressure to the blanking channel, and conveying raised dust generated in the blanking process of the activated carbon from the blanking channel to a primary air pipeline behind a coal mill of a power plant under the action of negative pressure airflow;
the dust enters a fine dust recovery device through a dust bin to be subjected to coarse and 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 a draught fan to enter a hearth boiler for combustion.
The dust is subjected to coarse-fine separation in a fine dust recovery device, air enters the fine dust recovery device 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 the lower end of the fine dust recovery device to a dust falling port.
Compared with the prior art, the invention has at least the following beneficial effects:
the system has a simple structure, can effectively separate dust generated in the adsorption and regeneration processes of the activated carbon, has high separation efficiency, can reuse the separated activated carbon material and the separated dust, saves energy and materials, and is clean and environment-friendly in operation site.
Further, thickness dirt powder separation baffle sets up in the outside of fine dust recoverer blanking pipe, and thickness dirt powder separation baffle reduces from last down flow area gradually, and upper end a week of thickness dirt powder separation baffle is equipped with decurrent buckling, and the fine powder is exported from the dusty air outlet along the clearance of thickness dirt powder separation baffle side under the air current effect, and the coarse grain is kept off at the fine dust recoverer by thickness dirt powder separation baffle, falls into the dust falling mouth of bottom fine dust recoverer below.
Furthermore, a 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, and a blanking gap is reserved between the suspended end and the material dust screen, so that the activated carbon falls down along the material dust screen, and the activated carbon is fully separated from dust.
The method effectively separates the material dust of the activated carbon regenerated at high temperature, the separated high-temperature dust directly sends the high-temperature fine dust to the coal mill through the blower and the fine dust recoverer, then the high-temperature fine dust enters the furnace for combustion through the primary air pipeline, and the raised dust in the blanking process is also sent to the coal mill through the induced draft fan, then the high-temperature dust enters the furnace for combustion.
Drawings
FIG. 1 is a schematic diagram of a structure in which the present invention can be implemented.
FIG. 2 is a schematic diagram of a dust screen that can be implemented.
The device comprises an air blower 1, an induced draft fan 2, a material dust screen 3, a material dust screen handle 4, a coarse dust and fine dust separating baffle 5, a dust distributor 6, a high-temperature feed inlet 7, a blanking port 8, a blanking port 9, a blanking valve 10, a blanking valve 11, an air inlet 12, an air outlet 13, a feeding baffle 14, a storage bin 15, a dust bin 16, a blanking channel 17, a fine dust recoverer 18 and a fine dust recoverer blanking pipe 19.
Detailed Description
The present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.
Referring to the attached drawings, the 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, a high-temperature feeding hole 7 is formed in the top end of the blanking channel 17, 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 material bin 15, the lower end of the material bin 15 is communicated with a blanking hole 8, and a blanking valve 10 is arranged between the lower end of the material bin 15 and the blanking; a blanking channel 17 is arranged above the material dust screen 3, a dust bin 16 is arranged below the material dust screen 3, the lower end of the dust bin 16 is connected 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 an 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 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; a fine dust separating baffle 5 is arranged in the middle of the inner cavity of the fine dust recoverer 18, and a dust distributor 6 is arranged below the fine dust separating baffle 5.
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 of the feeding baffle is a suspended end, and a blanking gap is reserved between the suspended end and the material dust screen 3, so that the activated carbon falls down along the material 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 inlet of an outlet communicated with an induced draft fan 2 is formed in the blanking channel 17, the induced draft fan 2 enables the blanking channel 17 to generate negative pressure air flow, lifted dust in the blanking channel 17 is taken out, the outlet of the induced draft fan 2 is communicated with a rear primary air pipeline of a coal mill of a power plant, and air flow of the induced draft fan 2 and air flow of a dust-containing air outlet 13 are mixed and then enter the rear primary air pipeline of the coal mill of the power plant.
The thick and thin dust separating baffle 5 is arranged outside the blanking pipe 19 of the fine dust collector, the through flow area of the thick and thin dust separating baffle 5 is gradually reduced from top to bottom, and a circle of the upper end of the thick and thin dust separating baffle 5 is bent downwards.
The distance between the thick and thin dust separating baffle 5 and the outer side of the fine dust collector blanking pipe 19 is 10-20cm, and the distance between the position with the largest diameter of the thick and thin dust separating baffle 5 and the inner wall of the fine dust collector 18 is 5-30 cm.
As an alternative, the coarse-fine dust separating baffle 5 is connected to the fine-dust collector down pipe 19 by a transverse link, or the coarse-fine dust separating baffle 5 is connected to the side wall of the fine-dust collector 18 by a transverse link.
The dust distributor 6 comprises a plurality of partition plates which are arranged at equal intervals in the circumferential direction, namely, the partition plates equally divide a cylinder in which the partition plates are arranged into a plurality of equal parts; as an example: when the number of the partition plates is two, the partition plates are spaced by 180 degrees, and the dust distributor 6 divides the lower part of the fine dust recoverer 18 into two parts; when the number of the clapboards is three, the clapboards are spaced at 120 degrees, and the dust distributor 6 divides the lower part of the fine dust recoverer 18 into three parts; when the partition plates are four, the partition plates are spaced 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 collector 18 is an open space, and the dust distributor 6 can make the dust fall more uniformly.
The lower part of the fine dust recoverer 18 is funnel-shaped, the upper part is straight cylinder-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 activated carbon quickly rolls to the bin 15 through the blanking channel 17, dust falls to the dust bin 16 from the dust screen 3 under the action of vibration and wind blowing.
A screen can be arranged at the dust-containing air outlet 13, and the screen and the dust-containing air outlet 13 are correspondingly arranged one by one;
the top end of the thick and thin dust separating baffle 5 can be provided with a screen, the screen is in a circular ring shape, the screen can be connected with the top end of the thick and thin dust separating baffle 5 and can also be connected and installed through the inner wall of the fine dust recoverer 18, and the size of the screen is 4-12 meshes.
Referring to fig. 2, a material dust screen handle 4 is arranged at the upper end of the material dust screen 3, the material dust screen 3 is in a pull type, a material dust screen groove is arranged on the blanking channel 17, and the material dust screen 3 passes through the material dust screen groove and is installed and convenient to replace.
The inlet of the draught fan 2 is connected with the upper section of the blanking channel 17, and the outlet of the draught fan 2 is connected with the outlet pipeline of the dust-containing air outlet 13 and then goes to the primary air pipeline behind the coal mill of the power plant.
The process and the principle of the invention are as follows:
the novel high-efficiency low-temperature integrated flue gas pollutant removal technology is characterized in that pollutants in flue gas are adsorbed by using activated carbon under a low-temperature working condition, the adsorbed activated carbon needs to be heated and regenerated, the regenerated and cooled activated carbon can be recycled, and the system is led to an outlet of the activated carbon after high-temperature regeneration.
Activated carbon regenerated at 250 +/-20 ℃ enters an activated carbon regeneration material dust separation system from a feed inlet 7, part of the activated carbon after feeding falls on a feeding baffle 14, a material dust screen 3 slides from the feeding baffle 14, the activated carbon screened by the material dust screen 3 falls through a blanking channel 17 and enters a storage bin 15, a blanking valve 10 is arranged at the lower end of the storage bin 15, and the material enters a subsequent cooling working section from a blanking port 8 through the blanking valve 10.
The screened dust enters 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 is uniformly distributed and falls down through a dust distributor 6, air is blown in through an air inlet 12 through an air blower 1, the air containing coarse dust and fine dust is separated through a coarse dust and fine dust separating baffle 5, the coarse dust falls down, and the fine dust is blown out from a dust-containing air outlet 13.
The material can produce a large amount of raise dusts in the blanking passageway 17 blanking, and the entry of draught fan 2 links to each other with the upper segment of blanking passageway 17, and the export of draught fan 2 links to each other the back with dust-laden air outlet 13 outlet pipe, and the air duct once comes behind the power plant's coal pulverizer, together sends into the boiler burning.
According to the method for separating the regenerated active carbon material dust based on the system, the active carbon subjected to high-temperature pyrolysis is cooled and then is sent into the blanking channel 17, the dust is separated from the active carbon under the action of blanking vibration, the active carbon enters the material bin 15, the dust enters the dust bin 16, and the raised dust generated in the blanking process of the active carbon is conveyed to a primary air pipeline behind a coal mill of a power plant from the blanking channel 17 by using air flow generated by the induced draft fan 2; the dust entering the dust bin 16 is subjected to coarse and fine separation, 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 the draught fan 2 to enter a hearth boiler for combustion, so that the active carbon is not influenced by the dust, the active carbon is recycled, and meanwhile, the dust is recycled.
The lower part of the material 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 dust and fine dust separating baffle 5, a dust distributor 6 and 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.
An air inlet 12 of the fine dust recoverer 18 is connected with an outlet of the air blower 1, and a dust-containing air outlet 13 of the fine dust recoverer 18 is communicated with a primary air pipeline behind a coal mill of a power plant.
The inlet of the draught fan 2 is connected with the upper section of the blanking channel 17, and the outlet of the draught fan 2 is connected with the outlet pipeline of the dust-containing air outlet 13 and then goes to the primary air pipeline behind the coal mill of the power plant.
The device effectively separates the material dust of the activated carbon regenerated at high temperature, the separated material goes to a cooling tower for cooling, the separated high-temperature dust is directly sent to a coal mill for primary air pipeline to enter the furnace for combustion through an air blower and a fine dust recoverer, the raised dust in the blanking process is also sent to the coal mill for primary air pipeline to enter the furnace for combustion through an induced draft fan, the device has a simple structure, the dust generated in the adsorption and regeneration processes of the activated carbon can be effectively separated, the separation efficiency is high, the separated high-temperature dust can be reused, the energy and the material are saved, and the operation site is clean and environment-friendly.
Claims (10)
1. The active carbon regeneration material dust separation 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 provided with a high-temperature feeding hole (7), the blanking channel (17) is communicated with the dust bin (16), a dust screen (3) is arranged at the communication position 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); a fine dust recoverer (18) is arranged at the lower end of the dust bin (16), an air inlet (12) is formed in the lower portion of the fine dust recoverer (18), the air inlet (12) is communicated with an outlet of the air 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 rear primary air pipeline of 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 a dust falling port (9) is formed in the lower end of the dust falling valve (11; a coarse dust and fine dust separating baffle (5) is arranged in the middle 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 a power plant, and the air inlet (12) faces to the center of the fine dust recoverer (18).
2. The activated carbon regeneration material dust separation system according to claim 1, wherein the coarse and fine dust separation baffle (5) is arranged outside the fine dust collector blanking pipe (19), the flow area of the coarse and fine dust separation baffle (5) is gradually reduced from top to bottom, and the upper end of the coarse and fine dust separation baffle (5) is bent downwards in a circle.
3. The activated carbon regeneration material dust separation system according to claim 1, wherein the distance between the thick and thin dust separation baffle (5) and the outer side of the fine dust collector blanking pipe (19) is 10-20cm, and the distance between the position where the diameter of the thick and thin dust separation baffle (5) is the largest and the inner wall of the fine dust collector (18) is 5-30 cm.
4. The activated carbon regeneration material dust separation system according to claim 1, wherein a dust distributor (6) is arranged below the coarse and fine dust separation baffle (5), the dust distributor (6) comprises vertical partition plates which are arranged at equal intervals in the vertical direction, and the number of the intervals is the same as that of the air inlets (12).
5. The system for separating the regenerated active carbon dust according to claim 1, wherein the dust-containing air outlets (13) are opened at the top end of the fine dust collector (18), and the number of the dust-containing air outlets (13) is the same as that of the air inlets (12).
6. The active carbon regeneration material dust separation system according to claim 1, wherein a screen is arranged at the dust outlet (13) or at the top end of the coarse and fine dust separation baffle (5), and the screen is 4-12 meshes;
the material dust screen (3) is a pluggable screen, and the specification of the material dust screen (3) is 8 meshes, 10 meshes, 12 meshes or 14 meshes.
7. The active carbon regeneration material dust separation system according to claim 1, wherein a 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 of the feeding baffle is a hanging end, and a blanking gap is reserved between the hanging end and the material dust screen (3).
8. The activated carbon regeneration material dust separation system according to claim 1, wherein the lower end of the storage bin (15) is communicated with the blanking port (8), and the blanking valve (10) is arranged between the lower end of the storage bin (15) and the blanking port (8).
9. The method for separating the regenerated active carbon material dust based on the system of the claims 1 to 8 is characterized in that the regenerated active carbon enters a blanking channel (17), the dust is separated from the active carbon under the action of blanking vibration and negative pressure, the active carbon enters a storage bin (15), and the dust enters a dust bin (16);
applying negative pressure to the blanking channel (17), and conveying raised dust generated in the blanking process of the activated carbon from the blanking channel (17) to a primary air pipeline behind a coal mill of a power plant under the action of negative pressure air flow;
the dust enters a dust bin (16) and enters a fine dust recoverer (18) for coarse and 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 a draught fan (2) to enter a hearth boiler for combustion.
10. The method for separating the regenerated active carbon dust according to claim 9, wherein the dust is coarsely and finely separated in a fine dust collector (18), the fine dust collector (18) is supplied with air from bottom to top, the separated fine dust is blown out from the dust-containing air outlet (13) along with the air flow, and the separated coarse particles are discharged from the lower end of the fine dust collector (18) to the dust outlet (9).
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