CN219050785U - Dust-containing wet flue gas dust removal and demisting purification device for roller crushing slag treatment process - Google Patents
Dust-containing wet flue gas dust removal and demisting purification device for roller crushing slag treatment process Download PDFInfo
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- CN219050785U CN219050785U CN202223292186.1U CN202223292186U CN219050785U CN 219050785 U CN219050785 U CN 219050785U CN 202223292186 U CN202223292186 U CN 202223292186U CN 219050785 U CN219050785 U CN 219050785U
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Abstract
The utility model discloses a dust-containing wet flue gas dust-removing and demisting purification device used in a roller crushing slag treatment process, which comprises a gas collecting assembly, a primary dust removing mechanism, a fan, a secondary dust removing mechanism and a circulating water tank assembly, wherein the primary dust removing mechanism is arranged on the gas collecting assembly; the utility model has the advantages that the installation construction period of the primary purification and the secondary purification is short, the occupied area of equipment is small, the ultra-clean dedusting and demisting tower adopts the cyclone coupling ultra-clean dedusting and demisting technology, the dedusting and demisting efficiency is far higher than that of wet electricity, the ultra-low discharge of dust and fog drops at the outlet of the system can be stably realized, the operation is safe and reliable, the possibility of explosion caused by the increase of the wet electricity at the tail end is avoided, and the phenomenon that wet electric cathode line scale is wrapped and no current is generated due to the fact that the content of alkaline substances such as Ca (OH) 2 in flue gas dust is too high is avoided.
Description
Technical Field
The utility model relates to the technical field of flue gas purification, in particular to a dust-containing wet flue gas dust removal and demisting purification device used in a roller crushing slag treatment process.
Background
The rolling crushing process is a process route widely adopted for slag treatment, slag is crushed and granulated by forward and reverse rotation of a rolling crusher, and meanwhile, cooling water is sprayed to realize rapid cooling of steel slag, and a large amount of dust-containing wet flue gas is generated in the process, and has the following characteristics:
1) The original dust emission concentration is high: up to 3000mg/Nm3, on average 500mg/Nm;
2) The humidity of the flue gas is high (10-20%);
3) The flue gas contains a large amount of Ca (OH) 2, is alkaline, and is easy to cause scaling of pipelines and equipment.
The existing flue gas purification technology route is as follows: purification by spray scrubber, cyclone dehydrator and wet electrostatic precipitator, but it has the following drawbacks:
1) The occupied area of the equipment is large, an independent spray washing tower, a rotational flow dehydrating tower, a wet electric dust collector, a fan and the like are needed, and the operation energy consumption of the equipment is high;
2) The wet electric dust remover has high construction cost and operation energy consumption, the anode pipe and the cathode wire are required to be overhauled and maintained regularly, a flushing blind area exists, the problems of internal blockage, scaling and the like are easy to cause, and dust is temporarily out of standard in the flushing process;
3) The wet electric dust collector has low dust collection efficiency, and the dust concentration at the inlet is required to be ensured to be less than 80mg/Nm 3 The ultra-low discharge of the outlet dust can be satisfied.
Disclosure of Invention
In view of the above, the main object of the present utility model is to provide a dust-containing wet flue gas dust-removing and demisting purification device for use in a roller crushing slag treatment process.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
the embodiment of the utility model provides a dust-containing wet flue gas dust removal and demisting purification device for a roller crushing slag treatment process, which comprises a gas collection assembly, a primary dust removal mechanism, a fan, a secondary dust removal mechanism and a circulating water tank assembly, wherein the output end of the gas collection assembly is connected with the input end of the primary dust removal mechanism and is used for primary dust removal of dust-containing wet flue gas, the output end of the primary dust removal mechanism is connected with the input end of the secondary dust removal mechanism through the fan and is used for secondary dust removal of dust-containing wet flue gas, and the circulating water tank assembly is used for supplying water to the secondary dust removal mechanism.
Preferably, the gas collecting assembly comprises a gas collecting hood and a smoke output end, wherein the gas collecting hood is arranged at the top of the slag roller crushing area and is used for collecting dust-containing wet smoke, one end of the smoke output end is connected with the gas collecting hood, and the other end of the smoke output end is connected with the primary dust removing mechanism.
The first-stage dust removal mechanism comprises a high-efficiency spray dehydration tower, a dehydrator, a first-stage water washing spray layer, a first circulating water tank, a first water washing pump and a first spray water collecting tank, wherein the first-stage water washing spray layer is arranged in the middle of the high-efficiency spray dehydration tower and is connected with the first circulating water tank arranged on the outer side of the high-efficiency spray dehydration tower through the first water washing pump, the first spray water collecting tank is arranged at the bottom of the high-efficiency spray dehydration tower, the dehydrator is arranged at the top of the high-efficiency spray dehydration tower, and the top of the high-efficiency spray dehydration tower is connected with the input end of the second-stage dust removal mechanism through a fan.
Preferably, the first-stage water washing spray layer comprises spray water pipes and spray heads, wherein the spray water pipes comprise a plurality of spray water pipes which are sequentially and longitudinally arranged in the middle of the efficient spray dehydration tower, four spray heads are uniformly arranged on two spray water pipes positioned at the bottom respectively, and one spray head is arranged on the rest spray water pipes.
In the utility model, preferably, a first air inlet end is arranged on the outer wall of the efficient spray dehydration tower, the first air inlet end is positioned above the first spray water collecting tank, and the first air inlet end is connected with the smoke output end.
The utility model is characterized in that the secondary dedusting mechanism comprises an ultra-clean dedusting and demisting tower, a cyclone coupling ultra-clean dedusting and demisting assembly, a high-efficiency turbulence booster, a secondary water washing spray layer, a flat plate demister, a secondary cyclone dedusting and demisting device and a second spray water collecting tank, wherein the high-efficiency turbulence booster is arranged at the middle lower part of the ultra-clean dedusting and demisting tower, the second spray water collecting tank is arranged at the bottom of the ultra-clean dedusting and demisting tower, the secondary water washing spray layer is arranged at the middle part of the ultra-clean dedusting and demisting tower, the flat plate demister is arranged in the ultra-clean dedusting and demisting tower and is positioned above the secondary water washing spray layer, the cyclone coupling ultra-clean dedusting and demisting assembly comprises a plurality of cyclone dedusting and demisting devices which are all arranged in the ultra-clean dedusting and demisting tower and are positioned above the flat plate demister, and the secondary cyclone dedusting and demisting device is arranged at the top of the ultra-clean dedusting and demisting tower.
The cyclone coupling ultra-clean dust removal defogging assembly comprises a first cyclone plate, a cyclone cylinder, a liquid guide groove, a flow guide pipe and a second cyclone plate, wherein the first cyclone plate and the second cyclone plate are respectively arranged at the middle part and the bottom of the cyclone cylinder, the liquid guide groove comprises a plurality of liquid guide grooves which are uniformly arranged in the cyclone cylinder, the bottom of the cyclone cylinder is provided with the flow guide pipe, and the flow guide pipe is arranged at the outer side of the second cyclone plate and is communicated with the inner wall of the cyclone cylinder.
Preferably, the circulating water tank assembly comprises a second circulating water tank and a second water washing pump, and the second circulating water tank is connected with the second water washing spray layer through the second water washing pump.
In the utility model, preferably, a second air inlet end is arranged on the outer wall of the ultra-clean dedusting and demisting tower, the second air inlet end is positioned above a second spray water collecting tank, and the top of the high-efficiency spray dehydrating tower is connected.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model has the advantages that the installation construction period of the primary purification and the secondary purification is short, the occupied area of equipment is small, the ultra-clean dedusting and demisting tower adopts the cyclone coupling ultra-clean dedusting and demisting technology, the dedusting and demisting efficiency is far higher than that of wet electricity, the ultra-low discharge of dust and fog drops at the outlet of the system can be stably realized, the operation is safe and reliable, the possibility of explosion caused by the increase of the wet electricity at the tail end is avoided, and the phenomenon that wet electric cathode line scale is wrapped and no current is generated due to the fact that the content of alkaline substances such as Ca (OH) 2 in flue gas dust is too high is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic diagram of a dust-containing wet flue gas dust removal and demisting purification device for a roller crushing slag treatment process according to an embodiment of the utility model;
FIG. 2 is a schematic view of a gas collecting assembly according to an embodiment of the present utility model;
FIG. 3 is a schematic structural diagram of a primary dust removing mechanism according to an embodiment of the present utility model;
FIG. 4 is a schematic structural diagram of a secondary dust removing mechanism according to an embodiment of the present utility model;
FIG. 5 is a schematic structural diagram of a cyclone coupled ultra-clean dust and mist removal assembly according to an embodiment of the present utility model;
fig. 6 is a schematic view illustrating a structure of a circulating water pond assembly according to an embodiment of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the devices or elements being referred to must have specific directions, be constructed and operated in specific directions, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration, are not to be construed as limitations of the present patent, and the specific meanings of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, article or apparatus that comprises the element.
The first embodiment of the utility model provides a dust-containing wet flue gas dedusting and demisting purification device for a roller crushing slag treatment process, which is shown in fig. 1-6 and comprises a gas collecting assembly 1, a first-stage dedusting mechanism 2, a fan 3, a second-stage dedusting mechanism 4 and a circulating water tank assembly 5, wherein the output end of the gas collecting assembly 1 is connected with the input end of the first-stage dedusting mechanism 2 and is used for carrying out first-stage dedusting on dust-containing wet flue gas, the output end of the first-stage dedusting mechanism 2 is connected with the input end of the second-stage dedusting mechanism 4 through the fan 3 and is used for carrying out second-stage dedusting on dust-containing wet flue gas, and the circulating water tank assembly 5 is used for supplying water to the second-stage dedusting mechanism 4.
As shown in fig. 1 and fig. 2, the gas collecting assembly comprises a gas collecting hood 11 and a flue gas output end 13, wherein the gas collecting hood 11 is arranged at the top of the steel slag rolling crushing zone 12 and is used for collecting dust-containing wet flue gas, one end of the flue gas output end 13 is connected with the gas collecting hood 11, and the other end of the flue gas output end 13 is connected with the primary dust removing mechanism 2.
As shown in fig. 1-3, the primary dust removing mechanism 2 comprises a high-efficiency spray dehydrating tower 21, a dehydrator 22, a primary water washing spray layer, a first circulating water tank 25, a first water washing pump 26 and a first spray water collecting tank 27, wherein the primary water washing spray layer is arranged in the middle of the high-efficiency spray dehydrating tower 21 and is connected with the first circulating water tank 25 arranged on the outer side of the high-efficiency spray dehydrating tower 21 through the first water washing pump 26, the first spray water collecting tank 27 is arranged at the bottom of the high-efficiency spray dehydrating tower 21, the dehydrator 22 is arranged at the top of the high-efficiency spray dehydrating tower 21, and the top of the high-efficiency spray dehydrating tower 21 is connected with the input end of the secondary dust removing mechanism 4 through a fan 3.
As shown in fig. 1-3, the primary water-washing spray layer comprises spray water pipes 23 and spray headers 24, the spray water pipes 23 comprise a plurality of spray water pipes which are sequentially and longitudinally arranged in the middle of the efficient spray dehydration tower 21, four spray headers 24 are uniformly arranged on two spray water pipes 23 positioned at the bottom respectively, and one spray header 24 is arranged on the rest of spray water pipes 23.
As shown in fig. 1-3, a first air inlet end 28 is disposed on the outer wall of the efficient spray dehydration tower 21, the first air inlet end 28 is located above the first spray water collection tank 27, and the first air inlet end 28 is connected with the flue gas output end 13.
As shown in fig. 1-4, the secondary dust removal mechanism 4 includes ultra-clean dust removal defogging tower 42, cyclone coupling ultra-clean dust removal defogging subassembly 41, high-efficient turbulent flow multiplier 43, secondary washing spray layer 44, dull and stereotyped defroster 45, secondary cyclone dust removal defogger 46, second sprays water catch bowl 47, high-efficient turbulent flow multiplier 43 sets up in the well below of ultra-clean dust removal defogging tower 42, the second sprays water catch bowl 47 sets up in the bottom of ultra-clean dust removal defogging tower 42, secondary washing spray layer 44 sets up in the middle part of ultra-clean dust removal defogging tower 42, dull and stereotyped defroster 45 sets up in ultra-clean dust removal defogging tower 42, and is located the top of secondary washing spray layer 44, cyclone coupling ultra-clean dust removal defogging subassembly 41 includes a plurality of, and is located the top of dull and stereotyped defroster 45, secondary cyclone defogger 46 sets up in the top of ultra-clean dust removal defogging tower 42.
As shown in fig. 1-5, the cyclone coupling ultra-clean dust and mist removing assembly 41 includes a first cyclone plate 411, a cyclone cylinder 412, a liquid guiding groove 413, a flow guiding pipe 414, and a second cyclone plate 415, wherein the first cyclone plate 411 and the second cyclone plate 415 are respectively disposed at the middle and bottom of the cyclone cylinder 412, the liquid guiding groove 413 includes a plurality of cyclone cylinders 412, is uniformly disposed in the cyclone cylinder 412, is disposed at the bottom of the cyclone cylinder 412, and is disposed at the outer side of the second cyclone plate 415, and the flow guiding pipe 414 is communicated with the inner wall of the cyclone cylinder 412.
As shown in fig. 1 to 6, the circulating water tank assembly 5 includes a second circulating water tank 51 and a second water washing pump 52, and the second circulating water tank 51 is connected to the second water washing spray layer 44 through the second water washing pump 52.
As shown in fig. 1-6, a second air inlet end 48 is arranged on the outer wall of the ultra-clean dedusting and demisting tower 42, the second air inlet end 48 is positioned above a second spray water collecting tank 47, and the top of the efficient spray dehydrating tower 21 is connected.
The working principle of the utility model is as follows:
as shown in fig. 1-6, wet dust and gas generated in the steel mill slag rolling and crushing treatment process is collected by a gas collecting hood 11 and a pipeline, and then enters a high-efficiency spray dehydration tower 21, a first water washing pump 26 pumps circulating water of a first circulating water tank 25 to a first-stage water washing spray layer, and after the gas passes through the first-stage water washing spray layer and the high-efficiency dehydrator, the concentration of dust and mist drops in the gas is greatly reduced, and then enters an ultra-clean dust and mist removing tower 41 through a dust removing fan 3.
The flue gas passes through the synergy area of the high-efficiency turbulence synergistic device 43 at first, the high-efficiency mass transfer of gas-liquid two phases is realized on the surface of the high-efficiency turbulence synergistic device 43, a large amount of fine dust in the flue gas is continuously coagulated and removed, then the flue gas passes through the secondary water washing spray layer 44, the circulating water in the second circulating water tank 51 is pumped by the second water washing pump 52 to be sent to the secondary water washing spray layer 44, the flue gas is reversely contacted with atomized liquid drops sprayed out by the spray header 24 in a reverse manner, the dust in the flue gas is captured, and the purified flue gas enters the cyclone coupling ultra-clean dust removal defogging assembly 41 for deep purification after defogging and flow equalization of the flat dust remover 45, so that the ultra-low emission requirements of dust and fog drops are finally met.
When the cyclone coupling ultra-clean dust removal defogging component 41 adopts a coupling cyclone dust removal defogging process, the flue gas enters an ultra-clean dust removal defogging area, firstly, the second cyclone plate 414 is used for carrying out flow equalization on the flue gas and enters the cyclone cylinder 412, the cyclone blades on the second cyclone plate 414 are used for cutting the flue gas to accelerate, the flue gas flow speed is improved under the minimum resistance condition, the speed requirement of rotating and separating the flue gas is met, the flue gas enters the first cyclone plate 411 after accelerating, intense rotation and disturbance are formed on the inner wall of the cyclone cylinder 412 to generate centrifugal force, tiny particles such as tiny liquid drops, dust and aerosol in the flue gas are mutually collided and condensed into large liquid drops, the large liquid drops are captured by the inner surface of the cyclone cylinder and then are timely led into an interlayer between the inner cylinder and the outer cylinder through the liquid guide groove 413, finally, the small particles are timely discharged into the tower through the liquid guide groove, the secondary carrying is avoided, the aim of removing the tiny particles is achieved, a flushing water device is arranged in the wall of the cyclone cylinder 412, the inner wall is regularly flushed, scaling is avoided, and the system is ensured to reach the standard and stably run for a long term.
After the flue gas passes through the ultra-clean dedusting and demisting tower, the flue gas is discharged through the tower top direct-discharge chimney, the bottom of the direct-discharge chimney is provided with the secondary cyclone dedusting and demisting device 46, the design of the aerodynamic principle is adopted, when the flue gas rises to enter the secondary cyclone dedusting and demisting device 46 area, the flue gas is continuously accelerated and swirled by utilizing the self kinetic energy due to the guiding and relay effect of the cyclone blades on the first cyclone plate 411, fine particles and fog drops carried in the flue gas are continuously collided through generating centrifugal force, are condensed into large particles, are thrown into the chimney, and return into the tower through dead weight, so that the dust and fog drops are ensured to reach the emission standards, and white smoke and rain are eliminated.
The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model.
Claims (9)
1. The dust-containing wet flue gas dedusting and demisting purification device is used for a roller crushing slag treatment process and is characterized by comprising a gas collecting assembly, a primary dedusting mechanism, a fan, a secondary dedusting mechanism and a circulating water tank assembly, wherein the output end of the gas collecting assembly is connected with the input end of the primary dedusting mechanism and is used for primary dedusting of dust-containing wet flue gas, the output end of the primary dedusting mechanism is connected with the input end of the secondary dedusting mechanism through the fan and is used for secondary dedusting of dust-containing wet flue gas, and the circulating water tank assembly is used for supplying water to the secondary dedusting mechanism.
2. The dust-containing wet flue gas dedusting and demisting purification device for a roller crushing slag treatment process according to claim 1, wherein the gas collecting assembly comprises a gas collecting hood and a flue gas output end, the gas collecting hood is arranged at the top of the slag roller crushing zone and is used for collecting dust-containing wet flue gas, one end of the flue gas output end is connected with the gas collecting hood, and the other end of the flue gas output end is connected with the primary dedusting mechanism.
3. The dust-containing wet flue gas dedusting and demisting purification device for the roller crushing slag treatment process according to claim 2, wherein the primary dedusting mechanism comprises a high-efficiency spray dehydrating tower, a dehydrator, a primary water washing spray layer, a first circulating water tank, a first water washing pump and a first spray water collecting tank, the primary water washing spray layer is arranged in the middle of the high-efficiency spray dehydrating tower and is connected with the first circulating water tank arranged on the outer side of the high-efficiency spray dehydrating tower through the first water washing pump, the first spray water collecting tank is arranged at the bottom of the high-efficiency spray dehydrating tower, the dehydrator is arranged at the top of the high-efficiency spray dehydrating tower, and the top of the high-efficiency spray dehydrating tower is connected with the input end of the secondary dedusting mechanism through a fan.
4. The dust-containing wet flue gas dedusting and demisting purification device for the roller crushing slag treatment process according to claim 3, wherein the primary water washing spray layer comprises spray water pipes and spray heads, the spray water pipes comprise a plurality of spray water pipes which are sequentially and longitudinally arranged in the middle of the efficient spray dehydration tower, four spray heads are uniformly arranged on two spray water pipes positioned at the bottom respectively, and one spray head is arranged on the rest spray water pipes.
5. The dust-containing wet flue gas dedusting and demisting purification device for a roller crushing slag treatment process according to claim 4, wherein a first air inlet end is arranged on the outer wall of the efficient spray dehydration tower, the first air inlet end is positioned above a first spray water collecting tank, and the first air inlet end is connected with a flue gas output end.
6. The dust-containing wet flue gas dust removal and demisting purification device for a roller crushing slag treatment process according to claim 5, wherein the secondary dust removal mechanism comprises an ultra-clean dust removal and demisting tower, a cyclone coupling ultra-clean dust removal and demisting assembly, a high-efficiency turbulence booster, a secondary water washing spray layer, a flat plate demister, a secondary cyclone dust removal and demisting device and a second spray water collecting tank, the high-efficiency turbulence booster is arranged below the ultra-clean dust removal and demisting tower, the second spray water collecting tank is arranged at the bottom of the ultra-clean dust removal and demisting tower, the secondary water washing spray layer is arranged at the middle part of the ultra-clean dust removal and demisting tower, the flat plate demister is arranged in the ultra-clean dust removal and demisting tower and is positioned above the secondary water washing spray layer, the cyclone coupling ultra-clean dust removal and demisting assembly comprises a plurality of water washing spray layers, the water washing spray layer is arranged in the ultra-clean dust removal and demisting tower and is positioned above the flat plate demister, and the secondary cyclone dust removal and demister is arranged at the top of the ultra-clean dust removal and demisting tower.
7. The dust-containing wet flue gas dust and mist removal purification device for a roller crushing slag treatment process according to claim 6, wherein the cyclone coupling ultra-clean dust and mist removal assembly comprises a first cyclone plate, a cyclone cylinder, a liquid guide groove, a flow guide pipe and a second cyclone plate, the first cyclone plate and the second cyclone plate are respectively arranged at the middle part and the bottom of the cyclone cylinder, the liquid guide groove comprises a plurality of liquid guide grooves which are uniformly arranged in the cyclone cylinder, the bottom of the cyclone cylinder is positioned at the outer side of the second cyclone plate, and the flow guide pipe is communicated with the inner wall of the cyclone cylinder.
8. The dust and mist removal purification device for wet dust-laden flue gas in a roller crushing slag treatment process according to claim 7, wherein the circulating water tank assembly comprises a second circulating water tank and a second water washing pump, and the second circulating water tank is connected with the secondary water washing spray layer through the second water washing pump.
9. The dust-containing wet flue gas dedusting and demisting purification device for the roller crushing slag treatment process according to claim 8, wherein a second air inlet end is arranged on the outer wall of the ultra-clean dedusting and demisting tower, the second air inlet end is positioned above a second spraying water collecting tank, and the top of the efficient spraying dehydrating tower is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223292186.1U CN219050785U (en) | 2022-12-08 | 2022-12-08 | Dust-containing wet flue gas dust removal and demisting purification device for roller crushing slag treatment process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223292186.1U CN219050785U (en) | 2022-12-08 | 2022-12-08 | Dust-containing wet flue gas dust removal and demisting purification device for roller crushing slag treatment process |
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| CN219050785U true CN219050785U (en) | 2023-05-23 |
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| CN202223292186.1U Active CN219050785U (en) | 2022-12-08 | 2022-12-08 | Dust-containing wet flue gas dust removal and demisting purification device for roller crushing slag treatment process |
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| CN (1) | CN219050785U (en) |
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Inventor after: Zhu Wen Inventor after: Ding Xiaoyong Inventor after: Liu Chao Inventor after: Chen Yong Inventor after: He Minpeng Inventor after: Bai Jiaxin Inventor after: Bai Pengshihan Inventor before: Zhu Wen Inventor before: Ding Xiaoyong Inventor before: Liu Chao Inventor before: Chen Yong Inventor before: He Minpeng |
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