CN113144771A - Flue gas deacidification dust removal integrated device based on dense-phase dry tower - Google Patents
Flue gas deacidification dust removal integrated device based on dense-phase dry tower Download PDFInfo
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- CN113144771A CN113144771A CN202110335017.2A CN202110335017A CN113144771A CN 113144771 A CN113144771 A CN 113144771A CN 202110335017 A CN202110335017 A CN 202110335017A CN 113144771 A CN113144771 A CN 113144771A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000003546 flue gas Substances 0.000 title claims abstract description 83
- 239000000428 dust Substances 0.000 title claims description 59
- 238000005192 partition Methods 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 28
- 239000000779 smoke Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010410 dusting Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 18
- 239000002245 particle Substances 0.000 description 15
- 238000001914 filtration Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
- B01D46/0041—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for feeding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
A flue gas deacidification and dedusting integrated device based on a dense-phase dry tower comprises a dense-phase dry tower deacidification device and a special deacidification deduster, wherein the dense-phase dry tower deacidification device comprises a flue gas inlet, a deacidification device body ash bucket feeder, an ash conveying device, a humidifier and a stirrer; the deacidification device comprises a deacidification device body, a deacidification device body and a deacidification device body, wherein the deacidification device body is divided into an air inlet side and an air outlet side by a partition plate, the lower ends of the air inlet side and the air outlet side are communicated with each other, and the lower ends of the air inlet side and the air outlet side are provided with a deacidification device body ash bucket and a deacidification device body ash bucket feeder; the deacidification device body ash bucket feeder is connected with the ash conveying device; the flue gas inlet is arranged on the upper portion of the air inlet side, the top of the air inlet side is further connected with a discharge hole of the humidifier, and a stirrer is arranged on the top of the air inlet side. The invention has the beneficial effects that: the flow field distribution is more uniform and reasonable; the land occupation and investment can be reduced; has high deacidification efficiency and obviously reduces the operation cost.
Description
Technical Field
The invention relates to a flue gas deacidification and dust removal integrated device based on a dense-phase drying tower, and belongs to the field of industrial flue gas deacidification and dust removal treatment.
Background
Flue gas deacidification using a dense phase dry column has shown increasingly significant advantages. At present, the dense phase drying tower and the bag-type dust remover are combined to perform the deacidification treatment of the flue gas, and the application is more and more popular, such as Chinese patents: ZL201020232657.8 'is a horizontal dense-phase circulation fluidization dry tower desulfurization device'. The disclosed combined use example of the circulating fluidization chamber, the dense phase chamber and the bag-type dust remover has the defects of large occupied area, unreasonable flue gas flow field and the like.
Disclosure of Invention
The invention aims to provide a flue gas deacidification and dedusting integrated device based on a dense-phase dry tower, which mainly solves the problems of flow field optimization and deacidification stroke extension.
In order to achieve the purpose, the technical scheme of the invention is realized by the following modes:
a flue gas deacidification and dedusting integrated device based on a dense-phase dry tower comprises a dense-phase dry tower deacidification device and a special deacidification deduster, wherein the dense-phase dry tower deacidification device comprises a flue gas inlet 10, a deacidification device body 9, a deacidification device body ash bucket 11, a deacidification device body ash bucket feeder 15, an ash conveying device 13, a humidifier 12 and a stirrer 8; the deacidification device body 9 is divided into an air outlet side 9-1 and an air inlet side 9-2 by a partition plate, the lower ends of the air inlet side 9-2 and the air outlet side 9-1 are communicated with each other, and the lower ends of the air inlet side 9-2 and the air outlet side 9-1 are provided with a deacidification device body ash hopper 11 and a deacidification device body ash hopper feeder 15; the ash conveying device 13 is connected between an ash hopper feeder of the deacidification device body and a deacidification agent circulating inlet 13-1 arranged at the upper part of the air inlet side 9-2; the flue gas inlet 10 is arranged at the upper part of the gas inlet side 9-2, the top of the gas inlet side 9-2 is also connected with a discharge hole of a humidifier 12, and the top of the gas inlet side is provided with a stirrer 8;
the special deacidification dust collector comprises a special deacidification dust collector ash bucket 7, a special deacidification dust collector ash bucket feeding machine 71, a special deacidification dust collector middle box body, a special deacidification dust collector air purifying chamber 1 and a flue gas outlet, wherein the special deacidification dust collector ash bucket feeding machine 71 is connected with the top of the air inlet side 9-2 through a humidifier 12.
Further, the deacidification agent circulation inlet 13-1 may be provided at a plurality of positions on different faces and at different heights of the upper part of the gas inlet side 9-2.
Furthermore, in the air inlet side 9-2, the surface of the baffle plate facing the flue gas inlet is in a wave shape, and meanwhile, in the air outlet side 9-1, the surface of the inner wall of the bottom of the air outlet side 9-1 facing the flow direction of the flue gas is in a wave shape.
Further, the height of the deacidification device body 9 is 10-50 m.
Further, the ash conveying device 13 adopts a pneumatic conveying mode, the conveying pressure is 1-80KP, and the conveying air volume is 1-300m3/min。
Furthermore, the stirrer 8 adopts a chain type distributor, the distribution diameter is 0.2-10m, and the rotating speed is 100-.
Further, the humidifier 12 employs a single shaft humidifier.
The invention has the beneficial effects that: by utilizing the deacidification and dedusting integrated device in the scheme, the emission of acidic waste gas and particulate matters in industrial waste gas is reduced, the environmental pollution is greatly reduced, the purpose of emission reduction is achieved, and the pollution discharge cost is saved for enterprises; the technical proposal is that the dust remover is arranged at the upper part of the deacidification tower, thus greatly reducing the occupied area and the investment (5 to 30 percent); the deacidification agent is in a dense phase state in the system, so that the deacidification efficiency is high (up to more than 95%), and meanwhile, the use of the stirrer improves the utilization efficiency of the deacidification agent, so that the operation cost can be obviously reduced. The flow field distribution of the technical scheme is more uniform and reasonable; the middle box body and the lower box body of the special de-acidification dedusting device can realize de-acidification function, thereby prolonging the de-acidification stroke and increasing the de-acidification reaction time; meanwhile, the problems of wastewater, corrosion, blockage, white smoke plume of a chimney, high water content of deacidification by-products and the like in a wet process technology are effectively solved.
The technical solution of the present invention is further described with reference to the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of a flue gas deacidification and dedusting integrated device based on a dense phase dry tower;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a partial enlarged view I of fig. 1.
The reference numbers in the figures illustrate:
1: a gas purifying chamber of a special de-dusting device for deacidification; 5: a bag filtering chamber; 6: a middle box body baffle plate; 7: an ash bucket of a special de-dusting device for deacidification; 71: a special de-dusting device for deacidification is provided with an ash bucket feeder; 8: a stirrer; 9: a deacidification device body; 9-1: a gas outlet side; 9-2: an air intake side; 10: a flue gas inlet; 11: an ash bucket of a deacidification device body; 12: a humidifier; 13: an ash conveying device; 13-1: a deacidification agent circulation inlet; 15: deacidifying device body ash bucket batcher.
Detailed Description
The following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as limiting or restricting the technical aspects of the present invention in any way.
Example one
The flue gas deacidification and dust removal integrated device based on the dense phase dry tower is used for deacidifying sintering flue gas of certain iron and steel enterprises, and the flue gas amount of the flue gas is 100 multiplied by 104m3H, SO before entering deacidification device2The concentration is 1000mg/m3。
A flue gas deacidification and dust removal integrated device based on a dense-phase dry tower is formed by combining a flue gas deacidification device of the dense-phase dry tower and a special deacidification dust removal device.
The flue gas deacidification device of the dense phase dry tower comprises a flue gas inlet 10, a deacidification device body 9, a deacidification device body ash bucket 11, a deacidification device body ash bucket feeder 15, an ash conveying device 13, a humidifier 12 and a stirrer 8.
The deacidification device body 9 described in this embodiment is divided into an air outlet side 9-1 and an air inlet side 9-2 by a partition plate, the lower ends of the air inlet side 9-2 and the air outlet side 9-1 are communicated with each other, and the lower ends of the air inlet side 9-2 and the air outlet side 9-1 are respectively provided with a deacidification device body ash hopper 11 and a deacidification device body ash hopper feeder 15.
The flue gas inlet 10 is arranged at the upper part of the gas inlet side 9-2, the top of the gas inlet side 9-2 is also connected with a discharge hole of a humidifier 12, and the top of the gas inlet side 9-2 is provided with a stirrer 8.
The upper part of the gas inlet side 9-2 is provided with three deacidification agent circulating inlets 13-1 which are respectively arranged at the upper parts of three side walls which are not adjacent to the gas outlet side 9-1, the heights of the three deacidification agent circulating inlets 13-1 are not completely the same, and the ash conveying device 13 is respectively connected between the deacidification device body ash hopper feeder and the three deacidification agent circulating inlets 13-1, which is shown in the attached figure 1.
In the air inlet side 9-2, the surface of the baffle plate facing the flue gas inlet 10 is in a wave shape, meanwhile, in the air outlet side 9-1, the surface of the inner wall of the bottom of the air outlet side (9-1) facing the flow direction of the flue gas is in a wave shape, referring to the attached figure 3, in order to avoid dust accumulation, the inclination angle of any part of the wave-shaped surface needs to be larger than the repose angle. The effect of the design is to generate turbulent flow in the system and ensure the full contact and mixing of the flue gas and the deacidification agent.
The special de-dusting device for deacidification comprises a special de-dusting device ash bucket 7 for deacidification, a special de-dusting device ash bucket feeder 71 for deacidification, a special de-dusting device middle box body for deacidification, a special de-dusting device air purifying chamber 1 for deacidification and a flue gas outlet. The special deacidification dust collector is characterized in that a gas purifying chamber is arranged above the middle box body of the special deacidification dust collector, bag filtering chambers 5 are respectively arranged on two sides of the middle box body, a dust collector ash hopper 7 is arranged below each bag filtering chamber 5, the special deacidification dust collector is installed at the top of the deacidification tower, a flue gas outlet of the deacidification tower positioned at the top end of the deacidification tower is directly connected to the bottom of the middle box body of the special deacidification dust collector, a middle box body baffle plate 6 is respectively installed on two sides between the two bag filtering chambers 5, the lower edge of the middle box body baffle plate 6 is fixedly connected with the top of the deacidification tower, and two sides of the middle box body are fixedly connected with two side walls of the middle box body. Because the innermost row of filter bags of filter bag room 5, be located the air inlet side or be the one row of filter bags of windward side promptly, the vertical impact that receives dusty air current most easily, in order to avoid dusty air current vertical impact filter bag, install the water conservancy diversion grid tray between the top edge of well box baffle 6 and card, the water conservancy diversion grid tray constitute by the grid that the multichannel set up along the vertical direction, each grid parallel arrangement, the quantity of grid and the position of each grid align with the innermost filter bag one by one in the filter bag room 5 respectively.
The special dust collector of deacidification include a plurality of special dust collector ash buckets 7 of deacidification, and every special dust collector ash bucket 7 lower extreme of deacidification all is equipped with special dust collector ash bucket batcher 71 of deacidification, and each special dust collector ash bucket batcher 71 of deacidification is connected to the top of admitting air side 9-2 through humidification machine 12 respectively, refers to fig. 2.
In this embodiment, the height of the deacidification device body 9 is 24 m; the ash conveying device 13 adopts a pneumatic conveying mode, the conveying pressure is 39.2KP, and the conveying air quantity is 1-300m3Min; the stirrer 8 adopts a vertical chain type distributor, the distribution diameter is 8m, and the rotating speed is 100-; the humidifier 12 is a single shaft humidifier.
After entering the air inlet side 9-2 from the flue gas inlet, the flue gas is immediately mixed with deacidification agents from the humidifier 12 and each ash conveying device 13, the mixture of the flue gas and the deacidification agents passes through the air inlet side from top to bottom and then enters the air outlet side from the bottom, passes through the air outlet side from bottom to top and enters the special dedusting device for deacidification.
Deacidifying material particles with larger particle size (more than 10 mu m) fall into an ash hopper 11 of the deacidifying device under the action of gravity and are circulated through a deacidifying agent circulating device 13, deacidifying material particles with smaller particle size (less than 10 mu m) enter a dedusting device along with flue gas and are distributed to two sides, so that gas-solid separation is realized;
in the embodiment, the material concentration is 500g/m by controlling the material quantity and the material circulating device3So that the deacidification material particles are always in a dense phase state in the device, and the full contact between the acid-containing flue gas and the deacidification agent is realized; can realize the control of SO2、SO3One or more of acid gases such as HCl, HF, HBr and the like are effectively removed;
the arrangement not only utilizes the middle box body and the lower box body of the dust remover to realize the deacidification function, but also really realizes the integration of deacidification and dust removal, so that the flow field distribution is more uniform and reasonable, as shown in the figure, and the occupied area and the construction cost can be reduced by 5-30%.
Example two
The flue gas deacidification and dust removal integrated device based on the dense phase dry tower is used for deacidifying the flue gas of a chemical enterprise, and the flue gas amount is 40 multiplied by 104m3The HF concentration before entering the deacidification device is 2000mg/m3。
A flue gas deacidification and dust removal integrated device based on a dense-phase dry tower is formed by combining a flue gas deacidification device of the dense-phase dry tower and a special deacidification dust removal device.
The flue gas deacidification device of the dense phase dry tower comprises a flue gas inlet 10, a deacidification device body 9, a deacidification device body ash bucket 11, a deacidification device body ash bucket feeder 15, an ash conveying device 13, a humidifier 12 and a stirrer 8.
The deacidification device body 9 described in this embodiment is divided into an air outlet side 9-1 and an air inlet side 9-2 by a partition plate, the lower ends of the air inlet side 9-2 and the air outlet side 9-1 are communicated with each other, and the lower ends of the air inlet side 9-2 and the air outlet side 9-1 are respectively provided with a deacidification device body ash hopper 11 and a deacidification device body ash hopper feeder 15.
The flue gas inlet 10 is arranged at the upper part of the gas inlet side 9-2, the top of the gas inlet side 9-2 is also connected with a discharge hole of a humidifier 12, and the top of the gas inlet side 9-2 is provided with a stirrer 8.
The upper part of the gas inlet side 9-2 is provided with two deacidification agent circulating inlets 13-1 which are respectively arranged on the upper parts of two side walls which are not adjacent to the gas outlet side 9-1, the heights of the two deacidification agent circulating inlets 13-1 are the same, and the ash conveying device 13 is respectively connected between the deacidification device body ash hopper feeder and the three deacidification agent circulating inlets 13-1, which is shown in the attached figure 1.
In the air inlet side 9-2, the surface of the baffle plate facing the flue gas inlet 10 is in a wave shape, and meanwhile, in the air outlet side 9-1, the surface of the inner wall of the bottom of the air outlet side (9-1) facing the flow direction of the flue gas is in a wave shape, referring to the attached figure 3, in order to avoid dust accumulation, the inclination angle of any part of the wave-shaped surface is ensured to be larger than the repose angle. The effect of this design is flow field turbulence, more suitable for dense phase operation.
The special de-dusting device for deacidification comprises a special de-dusting device ash bucket 7 for deacidification, a special de-dusting device ash bucket feeder 71 for deacidification, a special de-dusting device middle box body for deacidification, a special de-dusting device air purifying chamber 1 for deacidification and a flue gas outlet. The special deacidification dust collector is characterized in that a gas purifying chamber is arranged above the middle box body of the special deacidification dust collector, bag filtering chambers 5 are respectively arranged on two sides of the middle box body, a dust collector ash hopper 7 is arranged below each bag filtering chamber 5, the special deacidification dust collector is installed at the top of the deacidification tower, a flue gas outlet of the deacidification tower positioned at the top end of the deacidification tower is directly connected to the bottom of the middle box body of the special deacidification dust collector, a middle box body baffle plate 6 is respectively installed on two sides between the two bag filtering chambers 5, the lower edge of the middle box body baffle plate 6 is fixedly connected with the top of the deacidification tower, and two sides of the middle box body are fixedly connected with two side walls of the middle box body. Because the innermost row of filter bags of filter bag room 5, be located the air inlet side or be the one row of filter bags of windward side promptly, the vertical impact that receives dusty air current most easily, in order to avoid dusty air current vertical impact filter bag, install the water conservancy diversion grid tray between the top edge of well box baffle 6 and card, the water conservancy diversion grid tray constitute by the grid that the multichannel set up along the vertical direction, each grid parallel arrangement, the quantity of grid and the position of each grid align with the innermost filter bag one by one in the filter bag room 5 respectively.
The special dust collector of deacidification include a plurality of special dust collector ash buckets 7 of deacidification, and every special dust collector ash bucket 7 lower extreme of deacidification all is equipped with special dust collector ash bucket batcher 71 of deacidification, and each special dust collector ash bucket batcher 71 of deacidification is connected to the top of admitting air side 9-2 through humidification machine 12 respectively, refers to fig. 2.
In this embodiment, the height of the deacidification device body 9 is 42 m; the ash conveying device 13 adopts a pneumatic conveying mode, the conveying pressure is 78.4KP, and the conveying air quantity is 1-300m3Min; the stirrer 8 adopts a vertical chain type distributor, the distribution diameter is 4m, and the rotating speed is 100-; the humidifier 12 is a single shaft humidifier.
After entering the air inlet side 9-2 from the flue gas inlet, the flue gas is immediately mixed with deacidification agents from the humidifier 12 and each ash conveying device 13, the mixture of the flue gas and the deacidification agents passes through the air inlet side from top to bottom and then enters the air outlet side from the bottom, passes through the air outlet side from bottom to top and enters the special dedusting device for deacidification.
Deacidifying material particles with larger particle size (more than 10 mu m) fall into an ash hopper 11 of the deacidifying device under the action of gravity and are circulated through a deacidifying agent circulating device 13, deacidifying material particles with smaller particle size (less than 10 mu m) enter a dedusting device along with flue gas and are distributed to two sides, and gas-solid separation is realized.
In the embodiment, the material concentration is 800g/m by controlling the material quantity and the material circulating device3So that the deacidification material particles are always in a dense phase state in the device, and the full contact between the acid-containing flue gas and the deacidification agent is realized; can realize the control of SO2、SO3One or more of acid gases such as HCl, HF, HBr and the like are effectively removed.
EXAMPLE III
The flue gas deacidification and dust removal integrated device based on the dense phase dry tower is used for deacidifying flue gas of a certain enterprise, and the flue gas amount is 10 multiplied by 104m3The HCl concentration before entering the deacidification device is 300mg/m3。
A flue gas deacidification and dust removal integrated device based on a dense-phase dry tower is formed by combining a flue gas deacidification device of the dense-phase dry tower and a special deacidification dust removal device.
The flue gas deacidification device of the dense phase dry tower comprises a flue gas inlet 10, a deacidification device body 9, a deacidification device body ash bucket 11, a deacidification device body ash bucket feeder 15, an ash conveying device 13, a humidifier 12 and a stirrer 8.
The deacidification device body 9 described in this embodiment is divided into an air outlet side 9-1 and an air inlet side 9-2 by a partition plate, the lower ends of the air inlet side 9-2 and the air outlet side 9-1 are communicated with each other, and the lower ends of the air inlet side 9-2 and the air outlet side 9-1 are respectively provided with a deacidification device body ash hopper 11 and a deacidification device body ash hopper feeder 15.
The flue gas inlet 10 is arranged at the upper part of the gas inlet side 9-2, the top of the gas inlet side 9-2 is also connected with a discharge hole of a humidifier 12, and the top of the gas inlet side 9-2 is provided with a stirrer 8.
The upper part of the gas inlet side 9-2 is provided with a deacidification agent circulating inlet 13-1 which is arranged at the lower side of the flue gas inlet 10, and the ash conveying device 13 is respectively connected between an ash hopper feeder of a deacidification device body and the deacidification agent circulating inlet 13-1.
In the air inlet side 9-2, the surface of the baffle plate facing the flue gas inlet 10 is in a wave shape, and meanwhile, in the air outlet side 9-1, the surface of the inner wall of the bottom of the air outlet side 9-1 facing the flow direction of the flue gas is in a wave shape, referring to the attached drawing 3, in order to avoid dust accumulation, the inclination angle of any part of the wave-shaped surface is ensured to be larger than the repose angle. The effect of this design is flow field turbulence, more suitable for dense phase operation.
The special de-dusting device for deacidification comprises a special de-dusting device ash bucket 7 for deacidification, a special de-dusting device ash bucket feeder 71 for deacidification, a special de-dusting device middle box body for deacidification, a special de-dusting device air purifying chamber 1 for deacidification and a flue gas outlet. The special deacidification dust collector is characterized in that a gas purifying chamber is arranged above the middle box body of the special deacidification dust collector, bag filtering chambers 5 are respectively arranged on two sides of the middle box body, a dust collector ash hopper 7 is arranged below each bag filtering chamber 5, the special deacidification dust collector is installed at the top of the deacidification tower, a flue gas outlet of the deacidification tower positioned at the top end of the deacidification tower is directly connected to the bottom of the middle box body of the special deacidification dust collector, a middle box body baffle plate 6 is respectively installed on two sides between the two bag filtering chambers 5, the lower edge of the middle box body baffle plate 6 is fixedly connected with the top of the deacidification tower, and two sides of the middle box body are fixedly connected with two side walls of the middle box body. Because the innermost row of filter bags of filter bag room 5, be located the air inlet side or be the one row of filter bags of windward side promptly, the vertical impact that receives dusty air current most easily, in order to avoid dusty air current vertical impact filter bag, install the water conservancy diversion grid tray between the top edge of well box baffle 6 and card, the water conservancy diversion grid tray constitute by the grid that the multichannel set up along the vertical direction, each grid parallel arrangement, the quantity of grid and the position of each grid align with the innermost filter bag one by one in the filter bag room 5 respectively.
The special dust collector of deacidification include a plurality of special dust collector ash buckets 7 of deacidification, and every special dust collector ash bucket 7 lower extreme of deacidification all is equipped with special dust collector ash bucket batcher 71 of deacidification, and each special dust collector ash bucket batcher 71 of deacidification is connected to the top of admitting air side 9-2 through humidification machine 12 respectively, refers to fig. 2.
In this embodiment, the height of the deacidification device body 9 is 12 m; the ash conveying device 13 adopts a pneumatic conveying mode, the conveying pressure is 29.4KP, and the conveying air quantity is 1-300m3Min; the stirrer 8 adopts a vertical chain type distributor, the distribution diameter is 1m, and the rotating speed is 100-; the humidifier 12 is a single shaft humidifier.
After entering the air inlet side 9-2 from the flue gas inlet, the flue gas is immediately mixed with deacidification agents from the humidifier 12 and each ash conveying device 13, the mixture of the flue gas and the deacidification agents passes through the air inlet side from top to bottom and then enters the air outlet side from the bottom, passes through the air outlet side from bottom to top and enters the special dedusting device for deacidification.
Deacidifying material particles with larger particle size (more than 10 mu m) fall into an ash hopper 11 of the deacidifying device under the action of gravity and are circulated through a deacidifying agent circulating device 13, deacidifying material particles with smaller particle size (less than 10 mu m) enter a dedusting device along with flue gas and are distributed to two sides, and gas-solid separation is realized.
In the embodiment, the material concentration is 200g/m by controlling the material quantity and the material circulating device3So that the deacidification material particles are always in a dense phase state in the device, and the full contact between the acid-containing flue gas and the deacidification agent is realized; can realize the control of SO2、SO3One or more of acid gases such as HCl, HF, HBr and the likeEffective removal of several.
The above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope and application of the present invention. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (7)
1. The utility model provides a flue gas deacidification dust removal integrated device based on dense phase dry tower, includes dense phase dry tower deacidification device and special dust remover of deacidification, its characterized in that: the dense phase dry tower deacidification device comprises a flue gas inlet (10), a deacidification device body (9), a deacidification device body ash bucket (11), a deacidification device body ash bucket feeder (15), an ash conveying device (13), a humidifier (12) and a stirrer (8); the deacidification device comprises a deacidification device body (9) and is characterized in that the deacidification device body (9) is divided into an air outlet side (9-1) and an air inlet side (9-2) by a partition plate, the lower ends of the air inlet side (9-2) and the air outlet side (9-1) are communicated with each other, and the lower ends of the air inlet side (9-2) and the air outlet side (9-1) are respectively provided with a deacidification device body ash hopper (11) and a deacidification device body ash hopper feeder (15); the ash conveying device (13) is connected between a deacidification device body ash bucket feeder (15) and a deacidification agent circulating inlet (13-1) arranged at the upper part of the air inlet side (9-2); the flue gas inlet (10) is arranged at the upper part of the air inlet side (9-2), the top of the air inlet side (9-2) is also connected with a discharge hole of a humidifier (12), and the top of the air inlet side is provided with a stirrer (8);
the special dedusting device for deacidification comprises a special dedusting device ash bucket (7) for deacidification, a special dedusting device ash bucket feeding machine (71) for deacidification, a special dedusting device middle box body for deacidification, a special dedusting device air purifying chamber (1) for deacidification and a flue gas outlet, wherein the special dedusting device ash bucket feeding machine (71) for deacidification is connected with the top of the air inlet side (9-2) through a humidifier (12).
2. The flue gas deacidification and dedusting integrated device based on the dense phase dry tower as claimed in claim 1, is characterized in that: the deacidification agent circulating inlet (13-1) is arranged at a plurality of positions on different surfaces and different heights of the upper part of the gas inlet side (9-2).
3. The flue gas deacidification and dedusting integrated device based on the dense phase dry tower as claimed in claim 1, is characterized in that: in the air inlet side (9-2), the surface of the clapboard facing the smoke inlet is in a wave shape, and meanwhile, in the air outlet side (9-1), the surface of the inner wall of the bottom of the air outlet side (9-1) facing the flow direction of the smoke is in a wave shape.
4. The flue gas deacidification and dedusting integrated device based on the dense phase dry tower as claimed in claim 1, is characterized in that: the height of the deacidification device body (9) is 10-50 m.
5. The flue gas deacidification and dedusting integrated device based on the dense phase dry tower as claimed in claim 1, is characterized in that: the ash conveying device (13) adopts a pneumatic conveying mode, the conveying pressure is 1-80KP, and the conveying air quantity is 1-300m3/min。
6. The flue gas deacidification and dedusting integrated device based on the dense phase dry tower as claimed in claim 1, is characterized in that: the stirrer (8) adopts a chain type distributor, the distribution diameter is 0.2-10m, and the rotating speed is 100-1000 revolutions/min.
7. The flue gas deacidification and dedusting integrated device based on the dense phase dry tower as claimed in claim 1, is characterized in that: the humidifier (12) adopts a single-shaft humidifier.
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| CN113144771B (en) | 2024-06-04 |
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