CN218358396U - Wet flue gas desulfurization device - Google Patents
Wet flue gas desulfurization device Download PDFInfo
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- CN218358396U CN218358396U CN202221365257.3U CN202221365257U CN218358396U CN 218358396 U CN218358396 U CN 218358396U CN 202221365257 U CN202221365257 U CN 202221365257U CN 218358396 U CN218358396 U CN 218358396U
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- desulfurization
- desulfurizing tower
- flue gas
- waste water
- desulfurization mechanism
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Abstract
The utility model discloses a wet flue gas desulfurization device, which comprises a flue, a discharge chimney, a primary desulfurization mechanism and a secondary desulfurization mechanism, wherein the primary desulfurization mechanism and the secondary desulfurization mechanism are arranged between the flue and the discharge chimney; the primary desulfurization mechanism and the secondary desulfurization mechanism are both provided with an air inlet communicated with the flue, and a flue gas outlet of the primary desulfurization mechanism is communicated with an air inlet of the secondary desulfurization mechanism; the one-level desulfurization mechanism includes first desulfurizing tower, second grade desulfurization mechanism includes the second desulfurizing tower, just first desulfurizing tower bottom is provided with and communicates the waste water intercommunication passageway of second desulfurizing tower, just the emission chimney of the gas outlet intercommunication of second desulfurizing tower.
Description
Technical Field
The utility model belongs to the technical field of chemical production, concretely relates to wet flue gas desulfurization device.
Background
The wet desulphurization technology carries out desulphurization on the flue gas, has high desulphurization efficiency and stable system operation, and is one of the flue gas desulphurization processes which are most applied and have the most mature technology in the industry at present.
In the prior art, mainly generated after wet desulphurization is acidic wastewater and water vapor to be discharged, and the water vapor to be discharged needs to be reheated to the dew point and then discharged from a chimney. The wastewater is required to be collected again for treatment, the wastewater is wholly weakly acidic and contains a large amount of corrosive substances, and the direct discharge causes serious pollution to the environment, so that the desulfurized wastewater is required to be recycled.
But the waste water is recycled and reprocessed, on one hand, the waste water is too large, which causes waste water accumulation. The method is carried out by heating the desulfurization waste water, crystallizing and evaporating for multiple times in a crystallization evaporator to completely evaporate liquid water, and crystallizing and separating out other substances in a crystallization mode successively and separating and recycling. The method has the advantages that no waste water is discharged, zero discharge is completely realized, and various salts can be classified and recycled.
However, the method is hardly accepted by most enterprises due to very high investment, huge energy consumption, high operating cost and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a wet flue gas desulfurization device through combining waste water recovery and evaporation treatment technology, improves waste water treatment efficiency, saves economic cost.
In order to realize the purpose, the utility model discloses a technical scheme specifically do:
a wet flue gas desulfurization device comprises a flue, an exhaust chimney, a primary desulfurization mechanism and a secondary desulfurization mechanism, wherein the primary desulfurization mechanism and the secondary desulfurization mechanism are arranged between the flue and the exhaust chimney; the primary desulfurization mechanism and the secondary desulfurization mechanism are both provided with an air inlet communicated to a flue, and a flue gas outlet of the primary desulfurization mechanism is communicated to an air inlet of the secondary desulfurization mechanism; the one-level desulfurization mechanism includes first desulfurizing tower, second grade desulfurization mechanism includes the second desulfurizing tower, just first desulfurizing tower bottom is provided with and communicates the waste water intercommunication passageway of second desulfurizing tower, just the emission chimney of the gas outlet intercommunication of second desulfurizing tower.
Furthermore, the waste water connecting channel is also connected with a waste water storage tank.
Furthermore, a pressurizing device is further arranged on the waste water storage tank, and the waste water storage tank is further provided with a branch pipe leading to the discharge chimney.
Further, a heating device is arranged in the discharge chimney.
Furthermore, demisters are arranged in the first desulfurizing tower and the second desulfurizing tower.
Further, the bottom of the second desulfurization tower is provided with a wastewater outlet, and a slurry pump is connected to the wastewater outlet and is connected to the filter and the evaporative crystallization device.
Compared with the prior art, the utility model has the advantages of: first, the utility model discloses a two sets of desulfurization mechanisms to be provided with the retaining storage tank of reaction waste water between two sets of desulfurization mechanisms, do the collection with the waste water after the one-level reaction on the one hand, and the storage tank communicates second grade desulfurization mechanism or even to the chimney through pressure device respectively again, and partly waste water evaporates in the flue of chimney through the pressure-heating, and another part filters the evaporation after second grade desulfurization mechanism recycles, and the efficiency of overall treatment waste water is higher and practice thrift certain economic cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to these drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a wet flue gas desulfurization device provided by the present invention.
Reference numerals are as follows: 1-boiler, 2-dust remover, 3-induced draft fan, 4-first desulfurizing tower, 5-waste water storage tank, 6-second desulfurizing tower, 7-slurry pump, 8-filter, 9-evaporative crystallization device, 10-chimney.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and thus, cannot be understood as a limitation of the present invention.
Furthermore, the appearances of the terms "first," "second," "third," etc. in this specification are not intended to be limiting, but rather are merely to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "installed," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
As shown in fig. 1, a wet flue gas desulfurization device includes a flue, a discharge chimney 10, a primary desulfurization mechanism and a secondary desulfurization mechanism disposed between the flue and the discharge chimney 10; the primary desulfurization mechanism and the secondary desulfurization mechanism are both provided with an air inlet communicated with the flue, and a flue gas outlet of the primary desulfurization mechanism is communicated with an air inlet of the secondary desulfurization mechanism; one-level desulfurization mechanism includes first desulfurizing tower 4, and second grade desulfurization mechanism includes second desulfurizing tower 6, and first desulfurizing tower 4 bottom is provided with the waste water intercommunication passageway that communicates second desulfurizing tower 6, and the emission chimney 10 of the gas outlet intercommunication of second desulfurizing tower 6.
Compared with the prior art, in the prior art, after the wet desulphurization device or the wet desulphurization equipment basically adopts the boiler 1 to supply gas, the gas firstly passes through the dust remover 2 and is preheated and recycled to a heat exchanger by the draught fan 3 to a certain extent and then is introduced into the absorption tower or called the desulphurization tower to be sprayed and desulfurized, the general desulphurization medium can adopt limestone slurry, the desulphurization medium can be recycled for a certain time, finally obtained wastewater is conveyed to a next treatment unit through the slurry pump 7 to be heated and dehydrated, gypsum is obtained by dehydration, and the dehydrated water is crystallized and evaporated. The whole process is complex and troublesome for the treatment of the wastewater, and the waste water treatment by crystallization and evaporation consumes time and energy, and is high in cost. And the utility model discloses in, through setting up one-level desulfurization mechanism and second grade desulfurization mechanism, and every level desulfurization mechanism equally divide and do not set up the desulfurizing tower, one-level desulfurizing tower and second grade desulfurizing tower all have the air inlet that is connected to the flue, and the exhanst gas outlet of one-level desulfurizing tower links back to the flue gas import of second grade desulfurizing tower again, flue gas and former flue gas after once the desulfurization let in the second grade desulfurizing tower after mixing, and the second grade desulfurizing tower adopts the one-level desulfurizing tower to make used desulfurization medium circulate, do the secondary desulfurization to flue gas after once the desulfurization and the mixed flue gas of former flue gas, cyclic utilization has effectively reduced the production of waste water.
The waste water connecting channel is also connected with a waste water storage tank 5. A pressurizing device is also arranged on the waste water storage tank 5, and the waste water storage tank 5 is also provided with a branch pipe leading to the discharge chimney 10. A heating device is provided in the exhaust stack 10. The exhaust chimney 10 needs a heating device to maintain a certain temperature, so that the temperature is prevented from being below 50 ℃, the humidity is in a saturated state, when the temperature of flue gas is reduced in the conveying process of the flue and the chimney 10, a large amount of condensed water is separated out, the separated condensed water contains a large amount of acidic substances such as sulfuric acid and the like, the corrosivity is extremely high under the condition of 50 ℃, and a plurality of unit power plants rebuild the chimney 10 or regularly perform anticorrosion operation on the flue and the chimney 10 due to the corrosion. When waste water collected in the waste water storage tank 5 enters the discharge chimney 10 through pressurization, the pressurized waste water is also heated by the chimney 10 during heating, the pressurized and heated waste water can be sprayed into a flue gas channel of the chimney 10 through atomization, the fog drops of the waste water are in an overheat state and are instantaneously evaporated in a flue, and part of the fog drops of the water mist are instantaneously converted into saturated steam. The vaporized fog drop liquid is in a saturated water state, and immediately absorbs heat in the smoke to vaporize the liquid water drops.
Demisters are arranged in the first desulfurizing tower 4 and the second desulfurizing tower 6.
The bottom of the second desulfurizing tower 6 is provided with a wastewater outlet, and a slurry pump 7 is connected to the wastewater outlet, and the slurry pump 7 is connected to a filter 8 and an evaporative crystallization device 9.
During the specific use, boiler 1 comes gas and directly lets in first desulfurizing tower 4 through 3 partly desulfurates that carry out of draught fan after the dust removal in, and the lime stone thick liquid is chooseed for use to the desulfurization medium, carries out the desulfurization of first circulation in first desulfurizing tower 4, and the flue gas after the desulfurization connects back to the flue gas import of second desulfurizing tower 6 again to carry out the round with former flue gas and let in second desulfurizing tower 6 and carry out the secondary desulfurization after. And one part of the slurry left after the first desulfurization is introduced into the wastewater storage tank 5 for collection, the other part of the slurry is introduced into the second desulfurization tower 6, and the newly mixed limestone slurry is subjected to desulfurization circulation again. And (3) introducing the flue gas generated after the second desulfurization into a chimney 10 for discharging, and introducing the residual slurry after the second desulfurization into a filter 8 through a slurry pump 7 for filtration and then carrying out evaporative crystallization. And the waste water in the waste water storage tank 5 is pressurized by a pressurizing device and then is introduced into the chimney 10, the pressurized waste water is heated when the chimney 10 is used for heating, and the pressurized waste water is sprayed into the flue through the atomizing nozzle to be evaporated. The solid material obtained by evaporation is collected again.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.
Claims (6)
1. A wet flue gas desulfurization device is characterized in that: comprises a flue, an exhaust chimney (10), a primary desulfurization mechanism and a secondary desulfurization mechanism which are arranged between the flue and the exhaust chimney (10); the primary desulfurization mechanism and the secondary desulfurization mechanism are both provided with an air inlet communicated with the flue, and a flue gas outlet of the primary desulfurization mechanism is communicated with an air inlet of the secondary desulfurization mechanism; one-level desulfurization mechanism includes first desulfurizing tower (4), second grade desulfurization mechanism includes second desulfurizing tower (6), just first desulfurizing tower (4) bottom is provided with and communicates to the waste water intercommunication passageway of second desulfurizing tower (6), just discharge chimney (10) of the gas outlet intercommunication of second desulfurizing tower (6).
2. The wet flue gas desulfurization device of claim 1, wherein: the waste water communicating channel is also connected with a waste water storage tank (5).
3. The wet flue gas desulfurization device of claim 2, characterized in that: the waste water storage tank (5) is also provided with a pressurizing device, and the waste water storage tank (5) is also provided with a branch pipe leading to a discharge chimney (10).
4. The wet flue gas desulfurization device of claim 1, wherein: and a heating device is arranged in the discharge chimney (10).
5. The wet flue gas desulfurization device of claim 1, wherein: demisters are arranged in the first desulfurizing tower (4) and the second desulfurizing tower (6).
6. The wet flue gas desulfurization device of claim 1, wherein: and a wastewater outlet is formed in the bottom of the second desulfurization tower (6), a slurry pump (7) is connected to the wastewater outlet, and the slurry pump (7) is connected to a filter (8) and an evaporative crystallization device (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221365257.3U CN218358396U (en) | 2022-06-01 | 2022-06-01 | Wet flue gas desulfurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221365257.3U CN218358396U (en) | 2022-06-01 | 2022-06-01 | Wet flue gas desulfurization device |
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| Publication Number | Publication Date |
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| CN218358396U true CN218358396U (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221365257.3U Active CN218358396U (en) | 2022-06-01 | 2022-06-01 | Wet flue gas desulfurization device |
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2022
- 2022-06-01 CN CN202221365257.3U patent/CN218358396U/en active Active
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