CN210495900U - High-efficient single-tower desulfurization is dust removal defogging device in coordination - Google Patents
High-efficient single-tower desulfurization is dust removal defogging device in coordination Download PDFInfo
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- CN210495900U CN210495900U CN201920876581.3U CN201920876581U CN210495900U CN 210495900 U CN210495900 U CN 210495900U CN 201920876581 U CN201920876581 U CN 201920876581U CN 210495900 U CN210495900 U CN 210495900U
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Abstract
The utility model relates to a high-efficiency single-tower desulfurization and dust and mist removal device, which comprises a slurry circulating tank, a pollutant absorption area and a dust and mist removal area which are arranged from bottom to top in sequence; one side of the pollutant absorption area is provided with an absorption tower flue gas inlet, a plurality of layers of spraying pipe networks are arranged in the pollutant absorption area, and each spraying pipe networkThe slurry circulating tank is communicated with the slurry circulating tank through a pipeline and a circulating pump, a layer of porous alloy synergistic plate is arranged below the bottommost spraying pipe network, and a layer of synergistic ring is arranged below each of the other spraying pipe networks; the collaborative dust removal demisting zone comprises a collaborative dust removal device and a high-efficiency demister, and a flue gas outlet of the absorption tower is arranged at the top part close to the collaborative dust removal demisting zone. The utility model provides a pair of high-efficient single-tower desulfurization is dust removal defogging device in coordination realizes dust removal defogging in coordination in high-efficient desulfurization, can satisfy desulfurization export SO2Concentration value below 35mg/Nm3The concentration value of the particles is lower than 5mg/Nm3The emission requirement is low, the cost is low, and the efficiency is high.
Description
Technical Field
The utility model relates to a desulfurization dust removal technical field especially relates to a high-efficient single-tower desulfurization is dust removal defogging device in coordination.
Background
At present, the flue gas desulfurization of over 90 percent of domestic coal-fired power plants adopts a limestone-gypsum wet desulfurization process, and a desulfurization tower of the process is used for SO2Has high removing efficiency. Aiming at the dust concentration in the pollutants discharged by the coal-fired power plant being less than 5mg/Nm3The emission standard of the system is that the two most mainstream technical routes at present are a wet electric dust removal technology and a desulfurization tower synergistic dust removal technology respectively, the wet electric dust remover has high smoke dust removal efficiency, and the ultra-low emission of smoke dust is realized more reliably, but the system has the defects of large floor area, high investment cost, high operating cost and the like; and the desulfurizing tower is dust removal technology in coordination, through increase high-efficient relevant facility that removes dust in the desulfurizing tower, also can gain higher dust desorption efficiency, does not need extra occupation of land, only increases to some extent in the direction of absorption tower height, and the working costs is low, overhauls and maintains the convenience. Therefore, how to improve the synergistic dust removal capability of the desulfurizing tower becomes a research hotspot in the technical field of the desulfurization and dust removal of the flue gas at present, and it is also necessary to develop a high-efficiency desulfurization synergistic dust removal demisting device which can effectively reduce the content of smoke dust and gypsum fog drops in the flue gas at the outlet of the desulfurizing tower.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned not enough of prior art, the utility model provides a high-efficient single-tower desulfurization is dust removal defogging device in coordination improves current absorption tower desulfurization dust removal ability, simultaneously reduce cost.
The utility model discloses a realize through following technical scheme:
a high-efficiency single-tower desulfurization and dust and mist removal device comprises a slurry circulating tank, a pollutant absorption area and a synergistic dust and mist removal area which are sequentially arranged from bottom to top, wherein a plurality of stirring devices and an oxidation air pipe network are arranged in the slurry circulating tank; an absorption tower flue gas inlet is formed in one side of the pollutant absorption area, a plurality of layers of spraying pipe networks are arranged in the pollutant absorption area, each spraying pipe network is communicated with the slurry circulating tank through a pipeline and a circulating pump, a layer of porous alloy synergistic plate is arranged below the spraying pipe network positioned at the bottommost layer, and a layer of synergistic ring is arranged below each of the rest spraying pipe networks; the collaborative dust removal demisting zone comprises a collaborative dust removal device arranged above the topmost spray pipe network and a high-efficiency demister arranged at the upper part of the collaborative dust removal device, and a flue gas outlet of an absorption tower is arranged at the top part close to the collaborative dust removal demisting zone.
Furthermore, the oxidation air pipe network is composed of a plurality of branch pipes, a plurality of gas distribution small holes are uniformly formed in the bottom of each branch pipe, the gas distribution small holes are arranged on two sides of the bottom of each branch pipe in a staggered mode, and the axis of each gas distribution small hole is 45 degrees to the vertical direction.
Further, the porous alloy synergistic plate is arranged on the cross section of the whole pollutant absorption area, and the total area of the openings on the porous alloy synergistic plate is 20-40% of the cross section of the pollutant absorption area.
Furthermore, the spraying pipe network is provided with 2-5 layers, each layer of the spraying pipe network is composed of a plurality of branch pipes and a plurality of efficient nozzles, the efficient nozzles of the spraying pipe network are made of SiC materials, and the distance between every two layers of the spraying pipe network is not less than 1.8 m.
Furthermore, the spraying pipe network at the topmost layer is provided with a circle of unidirectional solid cone nozzles of nozzles close to the tower wall, and the middle nozzles adopt unidirectional hollow cone nozzles; the nozzles of the other spraying pipe networks except the top layer, which are close to the tower wall, adopt one-way solid cone nozzles, and the middle nozzles adopt two-way hollow cone nozzles.
Further, the distance between each synergistic ring and the closest upper layer spraying pipe network is 800-1000mm, the width of the ring plate of each synergistic ring is 600-1000mm, and the included angle between the ring plate and the inner wall of the absorption tower is 50-60 degrees.
Further, the collaborative dust removal device is arranged on the cross section of the whole collaborative dust removal and mist removal area, a plurality of small holes are formed in the collaborative dust removal device, and the total area of the holes of the collaborative dust removal device is 20-40% of the cross section of the collaborative dust removal and mist removal area.
Furthermore, the high-efficiency demister adopts a two-stage or three-stage ridge type and one-stage tubular demister.
Furthermore, the distance between the central line of the spraying pipe network at the bottommost layer and the top plate of the flue gas inlet of the absorption tower is 3-3.5m, the distance between the central line of the spraying pipe network at the topmost layer and the synergistic dust removal device is not less than 1.5m, the distance between the synergistic dust removal device and the high-efficiency demister is not less than 3m, and the distance between the high-efficiency demister and the flue gas outlet of the absorption tower is not less than 2 m.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model provides a high-efficient single-tower desulfurization is dust removal defogging device in coordination, simple structure, through increasing a layer porous alloy increase plate at the absorption tower flue gas entry for the flue gas equipartition that gets into in the absorption tower, the flow field is better, increases desulfurization and scrubbing efficiency; for the guarantee export dust is up to standard, install one deck dust collector in coordination additional between pipe network and the high-efficient defroster spraying, carry out rectification, dust interception and entrapment for the second time to the flue gas, simultaneously, carry out rational design to each parts interval in the tower, improve the defogging effect, reduce the liquid drop secondary and smuggle secretly, realize high-efficient dust removal in coordination when high-efficient desulfurization, efficiency is higher and the cost is lower.
Drawings
Fig. 1 is the utility model discloses a high-efficient single-tower desulfurization is dust removal defogging device's structural schematic in coordination.
In the figure:
1. a slurry circulation tank; 2. a circulation pump; 3. spraying a pipe network; 4. a stirring device; 5. oxidizing an air pipe network; 6. a flue gas inlet of the absorption tower; 7. a porous alloy synergistic plate; 8. a synergistic ring; 9. a collaborative dust removal device; 10. a high-efficiency demister; 11. a flue gas outlet of the absorption tower; 12. a contaminant absorption zone; 13. and a dust and mist removing area is cooperated.
Detailed Description
The following examples are presented to illustrate certain embodiments of the invention and should not be construed as limiting the scope of the invention. The present disclosure may be modified from materials, methods, and reaction conditions at the same time, and all such modifications are intended to be within the spirit and scope of the present disclosure.
The efficient single-tower desulfurization and dust and mist removal device shown in fig. 1 comprises a slurry circulation tank 1, a pollutant absorption area 12 and a synergistic dust and mist removal area 13 which are sequentially arranged from bottom to top, wherein a plurality of stirring devices 4 and an oxidation air pipe network 5 are arranged in the slurry circulation tank 1; an absorption tower flue gas inlet 6 is arranged on one side of the pollutant absorption area 12, a plurality of layers of spraying pipe networks 3 are arranged in the pollutant absorption area 12, each spraying pipe network 3 is communicated with the slurry circulating pool 1 through a pipeline and a circulating pump 2, a layer of porous alloy synergistic plate 7 is arranged below the spraying pipe network 3 at the bottommost layer, and a layer of synergistic ring 8 is arranged below each layer of spraying pipe network 3 except the bottommost layer; the collaborative dust and mist removing area 13 comprises a collaborative dust removing device 9 arranged above the topmost spray pipe network 3 and a high-efficiency demister 10 positioned at the upper part of the collaborative dust removing device 9, and an absorption tower flue gas outlet 11 is arranged at the top part close to the collaborative dust and mist removing area 13.
In this embodiment, the oxidation air pipe network 5 is composed of a plurality of branch pipes, a plurality of gas distribution small holes are uniformly arranged at the bottom of each branch pipe, the gas distribution small holes are arranged on two sides of the bottom of each branch pipe in a staggered manner, and the axes of the gas distribution small holes are 45 degrees to the vertical direction respectively.
In the embodiment, the porous alloy synergy plate 7 is arranged on the whole cross section of the pollutant absorption area 12, and the total area of the openings on the porous alloy synergy plate 7 is 20-40% of the cross section of the pollutant absorption area 12.
In this embodiment, the spraying pipe network 3 is provided with 2-5 layers, each layer of the spraying pipe network 3 is composed of a plurality of branch pipes and a plurality of high-efficiency nozzles, the high-efficiency nozzles of the spraying pipe network 3 are made of SiC materials, the atomizing pressure is 50-80 kPa, and the total spraying coverage rate of the nozzles 1m below is not less than 300% of the inner sectional area of the absorption tower; the distance between every two layers of the spraying pipe networks 3 is not less than 1.8 m.
In the embodiment, the spraying pipe network 3 at the topmost layer is a circle of unidirectional (downward) solid cone nozzles with a spraying angle of 90 degrees close to the tower wall, and the middle nozzles are unidirectional (downward) hollow cone nozzles with a spraying angle of 120 degrees; the nozzles of the other spraying pipe networks 3 except the top layer, which are close to the tower wall, adopt one-way (downward) solid cone nozzles with a spraying angle of 90 degrees, the middle nozzles adopt two-way (up and down) hollow cone nozzles with a spraying angle of 120 degrees.
In this embodiment, the distance between each efficiency-enhancing ring 8 and the closest upper layer spraying pipe network 3 is 800-.
In this embodiment, the cooperative dust removing device 9 is disposed on the cross section of the entire cooperative dust removing and defogging region 13, a plurality of small holes are formed in the cooperative dust removing device 9, and the total area of the openings of the cooperative dust removing device 9 is 20-40% of the cross section of the cooperative dust removing and defogging region 13.
In this embodiment, the high efficiency demister 10 is a two-stage or three-stage ridge type plus one-stage pipe type demister.
In this embodiment, the distance between the central line of the spraying pipe network 3 at the bottom layer and the top plate of the flue gas inlet 6 of the absorption tower is 3-3.5m, the distance between the central line of the spraying pipe network 3 at the top layer and the synergistic dust removal device 9 is not less than 1.5m, the distance between the synergistic dust removal device 9 and the high-efficiency demister 10 is not less than 3m, and the distance between the high-efficiency demister 10 and the flue gas outlet 11 of the absorption tower is not less than 2 m.
In order to facilitate further understanding of the above technical solutions, specific use processes thereof will now be described in detail:
alkaline slurry containing an absorbent in the slurry circulating tank 1 is respectively conveyed to corresponding spraying pipe networks 3 through a plurality of circulating pumps 2, is sprayed out by high-efficiency nozzles which are uniformly distributed, is in reverse contact with flue gas, finally falls back to the slurry circulating tank 1 for collection, and is recycled through the circulating pumps 2, a layer of porous alloy synergistic plate 7 is arranged below the bottom spraying pipe network 3, and the uniform distribution of the flue gas and the formation of a slurry liquid film are ensured by adopting a corrosion-resistant alloy material; a layer of synergistic ring 8 is respectively arranged below the spraying pipe network 3 except the bottommost layer, and the synergistic ring 8 is made of corrosion-resistant alloy materials or carbon steel lined with glass flakes, so that the flue gas is effectively prevented from escaping along the tower wall; one layer of collaborative dust removal device 9 is arranged above the top layer spray pipe network 3, corrosion-resistant alloy materials are adopted, secondary rectification, interception and trapping are carried out on the flue gas after spray washing, and entrained liquid drops are removed through the high-efficiency demister 10, so that desulfurization collaborative dust removal is realized.
After the porous alloy synergistic plate 7 and the synergistic dust removal device 9 are added, the advantages of the hollow spraying tower are taken into consideration, and the self dust removal efficiency is high. Liquid sprayed by the spraying pipe network 3 is temporarily retained on the porous alloy synergistic plate 7 to form a layer of liquid film, flue gas forms a strong stirring effect in the process of passing through the liquid film, gas and liquid generate a large number of small bubbles through violent collision, contact between gas and liquid is increased, the contact between gas and liquid on the plate is stronger than that in the spraying layer, and dust is easier to gather and precipitate in the liquid film; the flue gas after washing continues upwards to pass through dust collector 9 in coordination, take place inertial collision when the secondary rectification, directly intercept, the secondary improves the equipartition nature of gas on the absorption tower cross-section and increases gas-liquid contact specific surface area and reaction time to reach and improve desulfurization efficiency under the condition that does not increase the volume of spraying, carry out the secondary simultaneously and wash dirt, whole absorption tower desulfurization efficiency can reach more than 99%, dust collection efficiency can reach more than 90%, the processing of follow-up high-efficient defroster is resumeed, guarantee absorption tower export SO2Concentration value below 35mg/Nm3The concentration value of the particles is lower than 5mg/Nm3The emission requirements of (2).
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (9)
1. The efficient single-tower desulfurization and dust and mist removal device is characterized by comprising a slurry circulating tank (1), a pollutant absorption area (12) and a synergistic dust and mist removal area (13) which are sequentially arranged from bottom to top, wherein a plurality of stirring devices (4) and an oxidation air pipe network (5) are arranged in the slurry circulating tank (1); an absorption tower flue gas inlet (6) is arranged on one side of the pollutant absorption area (12), a plurality of layers of spraying pipe networks (3) are arranged in the pollutant absorption area (12), each spraying pipe network (3) is communicated with the slurry circulating pool (1) through a pipeline and a circulating pump (2), a layer of porous alloy synergistic plate (7) is arranged below the spraying pipe network (3) at the bottommost layer, and a layer of synergistic ring (8) is arranged below each spraying pipe network (3) except the bottommost layer; the collaborative dust and mist removing area (13) comprises a collaborative dust removing device (9) arranged above the topmost spraying pipe network (3) and a high-efficiency demister (10) arranged at the upper part of the collaborative dust removing device (9), and an absorption tower flue gas outlet (11) is arranged at the top part close to the collaborative dust and mist removing area (13).
2. The efficient single-tower desulfurization, dust removal and mist removal device as claimed in claim 1, wherein the oxidation air pipe network (5) is composed of a plurality of branch pipes, a plurality of gas distribution small holes are uniformly formed in the bottom of each branch pipe, the gas distribution small holes are arranged on two sides of the bottom of each branch pipe in a staggered mode, and the axes of the gas distribution small holes are 45 degrees to the vertical direction respectively.
3. The device for desulfurizing, dedusting and demisting at high efficiency and in coordination with the single tower as recited in claim 1, wherein the porous alloy enhanced plate (7) is disposed on the whole cross section of the pollutant absorption zone (12), and the total area of the openings on the porous alloy enhanced plate (7) is 20-40% of the cross section of the pollutant absorption zone (12).
4. The device for desulfurizing, dedusting and demisting in coordination with the high-efficiency single tower as claimed in claim 1, wherein the spraying pipe network (3) is provided with 2-5 layers, each layer of the spraying pipe network (3) is composed of a plurality of branch pipes and a plurality of high-efficiency nozzles, the high-efficiency nozzles of the spraying pipe network (3) are made of SiC, and the distance between every two layers of the spraying pipe network (3) is not less than 1.8 m.
5. The device for desulfurizing, dedusting and demisting in synergy of the high-efficiency single tower as recited in claim 1, wherein the spray pipe network (3) at the topmost layer is close to a circle of unidirectional solid cone nozzles of nozzles on the tower wall, and the middle nozzles adopt unidirectional hollow cone nozzles; the nozzles of the spraying pipe network (3) except the top layer, which are close to the tower wall, adopt one-way solid cone nozzles, and the middle nozzles adopt two-way hollow cone nozzles.
6. The device as claimed in claim 1, wherein the distance between each synergistic ring (8) and the closest upper layer spray pipe network (3) is 800-1000mm, the width of the ring plate of the synergistic ring (8) is 600-1000mm, and the included angle between the ring plate and the inner wall of the absorption tower is 50-60 °.
7. The efficient single-tower desulfurization and dust and mist removal device as claimed in claim 1, wherein the synergistic dust removal device (9) is arranged on the cross section of the whole synergistic dust and mist removal area (13), the synergistic dust removal device (9) is provided with a plurality of small holes, and the total area of the holes of the synergistic dust removal device (9) is 20-40% of the cross section of the synergistic dust and mist removal area (13).
8. The device for desulfurizing, dedusting and demisting in coordination with the high-efficiency single tower as recited in claim 1, wherein the high-efficiency demister (10) is a two-stage or three-stage ridge-type demister with one-stage tubular demister.
9. The device for desulfurizing, dedusting and demisting in coordination with the high-efficiency single tower as recited in claim 1, wherein the distance between the center line of the spray pipe network (3) at the bottom layer and the top plate of the flue gas inlet (6) of the absorption tower is 3-3.5m, the distance between the center line of the spray pipe network (3) at the top layer and the dedusting device (9) at the top layer is not less than 1.5m, the distance between the dedusting device (9) at the top layer and the high-efficiency demister (10) is not less than 3m, and the distance between the high-efficiency demister (10) and the flue gas outlet (11) of the absorption tower is not less than 2 m.
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| CN201920876581.3U CN210495900U (en) | 2019-06-11 | 2019-06-11 | High-efficient single-tower desulfurization is dust removal defogging device in coordination |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113477013A (en) * | 2021-07-26 | 2021-10-08 | 国能龙源环保有限公司 | Novel compound wet dedusting and demisting tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113477013A (en) * | 2021-07-26 | 2021-10-08 | 国能龙源环保有限公司 | Novel compound wet dedusting and demisting tower |
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