Flue gas treatment device

Abstract

The invention relates to the technical field of flue gas treatment, and particularly provides a flue gas treatment device. The flue gas treatment device comprises a stirring assembly, a gas-liquid separation assembly, a desulfurization and denitrification assembly, a dust removal assembly and a circulating flue, wherein a solvent is contained in the stirring assembly; the gas-liquid separation assembly is used for separating liquid in the flue gas; the desulfurization and denitrification assembly comprises a desulfurization bin and a denitrification bin, a first reactant can be introduced into the desulfurization bin, and a second reactant can be introduced into the denitrification bin; the dust removal assembly is used for performing dust removal treatment on the flue gas; one end of the circulating flue is communicated with the flue gas conveying pipeline of the dust removal assembly, and the other end is communicated with the gas inlet pipeline of the stirring assembly. According to the flue gas treatment device, a dry method and a wet method are combined, boron oxide, sulfide and nitride can be removed through the stirring assembly and the desulfurization and denitrification assembly, flue gas treatment is more thorough, the stability of flue gas circulating in the flue gas treatment device is guaranteed through the circulating flue, and the flue gas treatment effect is guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of flue gas treatment, and in particular to a flue gas treatment device. Background Art

[0002] The hazards caused by boron oxide (BO) in flue gas are multi-dimensional and far-reaching. Its impact can be summarized as follows: environment, health, equipment corrosion and industrial product quality.

[0003] Boric oxide is an environmental pollutant, and its emission in flue gas will seriously threaten the balance of natural ecosystems. It is not easily decomposed naturally, and long-term accumulation in soil and water will lead to a decline in ecological environment quality, affect plant growth and development, interfere with the food chain of aquatic ecosystems, and may lead to a decrease in species diversity. In addition, boric oxide can be further spread through rainwater runoff, expanding the scope of pollution and posing a potential threat to a wider area.

[0004] In high-temperature industrial processes, boric oxide in flue gas can react with water vapor to form boric acid, which is corrosive and can corrode metal surfaces, especially equipment made of aluminum, iron and other materials, such as chimney linings, heat exchanger pipes, etc. This corrosion not only shortens the service life of equipment and increases the maintenance and replacement costs of enterprises, but may also cause safety accidents due to equipment failure, threatening production safety.

[0005] Among the current flue gas treatment methods, most treat the sulfides and nitrides in the flue gas, resulting in incomplete flue gas treatment. In addition, during the flue gas treatment process, as the flue gas supply volume changes, the flow rate of the flue gas in the channel changes, making the stability of the flue gas in the flue poor, affecting the flue gas treatment effect. Summary of the invention

[0006] A technical problem to be solved by the present disclosure is that the current flue gas treatment method has the technical problems of incomplete flue gas treatment and poor flue gas treatment effect.

[0007] In order to solve the above technical problems, the present disclosure provides a flue gas treatment device, including:

[0008] A stirring assembly, used for introducing flue gas, wherein a solvent for absorbing boron oxide in the flue gas is placed in the stirring assembly;

[0009] The gas-liquid separation component is used to receive the flue gas delivered by the stirring component and separate the liquid in the flue gas;

[0010] A desulfurization and denitration component is used to receive the flue gas separated by the gas-liquid separation component. The desulfurization and denitration component includes a desulfurization chamber and a denitration chamber. The desulfurization chamber can introduce a first reactant for absorbing sulfides in the flue gas, and the denitration chamber can introduce a second reactant for absorbing nitrogen oxides in the flue gas.

[0011] A dust removal component is used to receive the flue gas output by the desulfurization and denitrification components and perform dust removal on the flue gas; and

[0012] A circulating flue, one end of which is connected to the flue gas conveying pipeline of the dust removal component, and the other end of which is connected to the air inlet pipeline of the stirring component.

[0013] In some embodiments, the stirring assembly includes a stirring drum, a cavity for containing the solvent is formed inside the stirring drum, and a stirring shaft for stirring the solvent is rotatably arranged inside the stirring drum.

[0014] In some embodiments, the air inlet of the desulfurization bin is connected to the air outlet of the gas-liquid separation component, the air inlet of the denitrification bin is connected to the air outlet of the desulfurization bin, and the air inlet of the dust removal component is connected to the air outlet of the denitrification bin.

[0015] In some embodiments, the bottom of the denitrification bin is connected to the desulfurization bin via a first reflux pipe, and the first reactant precipitated in the denitrification bin flows back into the desulfurization bin via the first reflux pipe.

[0016] In some embodiments, the bottom of the dust removal assembly is connected to the desulfurization bin via a second reflux pipe, and the first reactant separated by the dust removal assembly flows back into the desulfurization bin via the second reflux pipe.

[0017] In some embodiments, the desulfurization and denitrification assembly further includes a first feed bin for providing a first reactant toward the desulfurization bin;

[0018] And / or, the desulfurization and denitrification assembly further includes a second feed bin for providing a second reactant toward the denitrification bin.

[0019] In some embodiments, the solvent comprises an aqueous solution, magnesium hydroxide, or calcium hydroxide;

[0020] and / or, the first reactant comprises slaked lime or sodium carbonate;

[0021] And / or, the second reactant includes aqueous ammonia, liquid ammonia or urea.

[0022] In some embodiments, the flue gas treatment device further includes an induced draft fan, which is disposed on the flue gas conveying duct of the dust removal assembly.

[0023] In some embodiments, the liquid discharge port of the gas-liquid separation component is connected to the stirring component through a liquid discharge pipe.

[0024] In some embodiments, the drainage pipe is also connected to a diversion pipe.

[0025] Through the above-mentioned technical scheme, the flue gas treatment device provided by the present invention adopts a combination of dry and wet methods, and can achieve the removal of boron oxide, sulfide and nitride through the stirring component and the desulfurization and denitrification component, so that the flue gas treatment is more thorough, and the emission of toxic substances is prevented. The stability of the flue gas circulating in the flue gas treatment device is ensured through the circulating flue, thereby ensuring the flue gas treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 is a schematic structural diagram of a flue gas treatment device disclosed in an embodiment of the present disclosure;

[0028] Figure 2 It is a flow chart of the flue gas treatment device disclosed in the embodiment of the present disclosure when treating flue gas.

[0029] Description of reference numerals:

[0030] 1. Stirring assembly; 11. Stirring drum; 12. Stirring shaft; 13. Air intake duct; 2. Gas-liquid separation assembly; 3. Desulfurization and denitrification assembly; 31. Desulfurization bin; 32. Denitrification bin; 33. First reflux duct; 34. Second reflux duct; 35. First feed bin; 36. Second feed bin; 4. Dust removal assembly; 41. Flue gas conveying duct; 5. Circulating flue; 6. Induced draft fan; 7. Drainage duct; 71. Diversion duct; 8. Kiln; 9. Chimney. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0032] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0033] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0035] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0036] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0038] Combination Figure 1 and Figure 2 As shown, the flue gas treatment device provided in the embodiment of the present disclosure includes a stirring component 1, a gas-liquid separation component 2, a desulfurization and denitrification component 3, a dust removal component 4 and a circulating flue 5.

[0039] The stirring assembly 1 is used to introduce flue gas, and a solvent for absorbing boric oxide in the flue gas is placed in the stirring assembly 1. Specifically, the exhaust port of the kiln 8 is connected to the smoke inlet of the stirring assembly 1 through the air intake pipe 13, and the flue gas discharged from the kiln 8 enters the stirring assembly 1 through the air intake pipe 13. As the stirring assembly 1 is stirred, the boric oxide in the flue gas fully reacts with the solvent in the stirring assembly 1 to generate precipitated substances, thereby achieving the removal of the boric oxide.

[0040] The gas-liquid separation component 2 is used to receive the flue gas delivered by the stirring component 1 and separate the liquid in the flue gas. The gas-liquid separation component 2 is used to separate the liquid (solvent and / or water) carried in the flue gas to reduce the cost of liquid mixed in the flue gas.

[0041] The desulfurization and denitration component 3 is used to receive the flue gas separated by the gas-liquid separation component 2. The desulfurization and denitration component 3 includes a desulfurization bin 31 and a denitration bin 32. The desulfurization bin 31 can introduce a first reactant for absorbing sulfides in the flue gas, and the denitration bin 32 can introduce a second reactant for absorbing nitrogen oxides in the flue gas. Specifically, the first reactant can be transported toward the desulfurization bin 31 by spraying, so that the first reactant is mixed with the flue gas in the desulfurization bin 31. After mixing, the first reactant reacts with the sulfide in the flue gas to achieve desulfurization of the flue gas. The second reactant can be transported toward the denitration bin 32 by spraying, so that the second reactant is mixed with the flue gas in the denitration bin 32. After mixing, the second reactant reacts with the nitrogen oxides in the flue gas to achieve denitration of the flue gas.

[0042] The dust removal component 4 is used to receive the flue gas output by the desulfurization and denitrification component 3 and perform dust removal on the flue gas. The dust removal component 4 is used to separate solid impurities in the flue gas, further reduce the solid cost carried in the flue gas, and reduce the pollution of the discharged flue gas to the environment.

[0043] One end of the circulating flue 5 is connected to the flue gas conveying pipe 41 of the dust removal component 4, and the other end of the circulating flue 5 is connected to the air intake pipe 13 of the stirring component 1. Therefore, the clean flue gas obtained after being treated by the stirring component 1 and the desulfurization and denitrification component 3 can flow back to the air intake end of the stirring component 1 through the circulating pipe, which can ensure that the flow rate of each reaction section of the flue gas treatment device in the reaction tower remains relatively stable when the flue gas working conditions change, thereby ensuring the stable operation of the entire system. Specifically, when the flow rate of the flue gas entering the air intake pipe 13 decreases, the flow rate of the flue gas entering the air intake pipe 13 through the circulating flue 5 increases, and when the flow rate of the flue gas entering the air intake pipe 13 increases, the flow rate of the flue gas entering the air intake pipe 13 through the circulating flue 5 decreases, so that the flue gas flow and flow rate in the system remain stable.

[0044] like Figure 2As shown, when the flue gas treatment device provided by the present disclosure is used, the high-temperature flue gas enters the stirring component 1 from the kiln 8, and the boron oxide in the flue gas is removed by a full reaction with the solvent (aqueous solution, magnesium hydroxide or calcium hydroxide) in the stirring component 1. The flue gas flowing out of the stirring component 1 enters the gas-liquid separation component 2 to remove the liquid in the flue gas and then flows to the desulfurization and denitrification component 3. The first reactant (slaked lime or sodium carbonate) is added at the port of the desulfurization bin 31 to remove sulfide; the second reactant (ammonia water, liquid ammonia or urea) is added in front of the denitrification bin 32 to remove nitrogen oxides in the flue gas, and then the dust in the flue gas is removed through the dust removal component 4. Since the first reactant (slaked lime or sodium carbonate) carried by the flue gas in the dust removal component 4 and the denitrification bin 32 sinks to the bottom of the bin, it returns to the desulfurization bin 31 through the first reflux pipe 33 and the second reflux pipe 34. The purified flue gas is discharged into the chimney 9 through the induced draft fan 6, and the clean flue gas is discharged into the atmosphere through the chimney 9. A circulating flue 5 is provided on the flue gas conveying duct 41 of the induced draft fan 6 , and the clean flue gas flows to the air inlet end of the stirring assembly 1 through the circulating flue 5 .

[0045] The flue gas treatment device provided by the present invention adopts a combination of dry and wet methods, and can achieve the removal of boron oxide, sulfide and nitride through the stirring component 1 and the desulfurization and denitrification component 3, so that the treatment of the flue gas is more thorough, and the emission of toxic substances is prevented. The stability of the flue gas circulating in the flue gas treatment device is ensured through the circulating flue 5, thereby ensuring the treatment effect of the flue gas.

[0046] In some embodiments, Figure 1 As shown, the stirring assembly 1 includes a stirring drum 11 , a cavity for containing a solvent is formed inside the stirring drum 11 , and a stirring shaft 12 for stirring the solvent is rotatably arranged inside the stirring drum 11 .

[0047] Specifically, the mixing drum 11 is provided with an air inlet and an air outlet, the air inlet of the mixing drum 11 is communicated with the air inlet pipe 13, and the air outlet of the mixing drum 11 is communicated with the air inlet of the gas-liquid separation component 2. The stirring shaft 12 extends along the axial direction of the mixing drum 11, and the outer periphery of the stirring shaft 12 is provided with stirring blades. The top of the mixing drum 11 is provided with a driving motor, and the driving motor is used to drive the stirring shaft 12 to rotate, and then stir the solvent through the stirring blades, so that the flue gas flowing into the mixing drum 11 can fully react with the solvent, ensuring the treatment effect of boron oxide.

[0048] In some embodiments, the gas-liquid separation component 2 includes a gas-liquid separator, wherein the gas-liquid separator is a separation device that uses the principles of centrifugal separation and wire mesh filtration to achieve liquid removal. It is a conventional equipment in the field of gas-liquid separation, and its structure and working principle are not described in detail here.

[0049] In some embodiments, the air inlet of the desulfurization bin 31 is connected to the air outlet of the gas-liquid separation component 2, the air inlet of the denitrification bin 32 is connected to the air outlet of the desulfurization bin 31, and the air inlet of the dust removal component 4 is connected to the air outlet of the denitrification bin 32. In this design, the flue gas after gas-liquid separation first passes through the desulfurization bin 31 for desulfurization treatment, and then enters the denitrification bin 32 for denitrification treatment.

[0050] In some embodiments, the air inlet of the denitrification bin 32 is connected to the air outlet of the gas-liquid separation component 2, the air outlet of the denitrification bin 32 is connected to the air inlet of the desulfurization bin 31, and the air inlet of the dust removal component 4 is connected to the air outlet of the desulfurization bin 31. In this design, the flue gas after gas-liquid separation first passes through the denitrification bin 32 for denitrification treatment, and then enters the desulfurization bin 31 for desulfurization treatment.

[0051] In some embodiments, the bottom of the denitrification bin 32 is connected to the desulfurization bin 31 via a first reflux pipe 33 , and the first reactant precipitated in the denitrification bin 32 flows back into the desulfurization bin 31 via the first reflux pipe 33 .

[0052] In this design, the first reactant precipitated in the denitrification chamber 32 can flow back into the desulfurization chamber 31 through the first reflux pipe 33, so that the first reactant can be recycled, reducing the operating cost of the equipment.

[0053] In some embodiments, the dust removal component 4 includes a dust collector, wherein the dust collector is a conventional device for separating dust from flue gas, and its structure and working principle are not described in detail herein.

[0054] In some embodiments, the bottom of the dust removal assembly 4 is connected to the desulfurization bin 31 via a second reflux pipe 34 , and the first reactant separated by the dust removal assembly 4 flows back into the desulfurization bin 31 via the second reflux pipe 34 .

[0055] Under this design, the first reactant separated by the dust removal component 4 can flow back into the desulfurization bin 31 through the second reflux pipe 34, so that the first reactant can be recycled, reducing the operating cost of the equipment.

[0056] In some embodiments, the desulfurization and denitrification assembly 3 further includes a first feed bin 35 for providing a first reactant toward the desulfurization bin 31 .

[0057] In this design, the first feed bin 35 is used as a reserve bin for the first reactant to continuously supply the first reactant to the desulfurization bin 31 to ensure that the supply of the first reactant meets the demand.

[0058] In some embodiments, the desulfurization and denitrification assembly 3 further includes a second feed bin 36 for providing a second reactant toward the denitrification bin 32 .

[0059] In this design, the second feed bin 36 is used as a reserve bin for the second reactant to continuously supply the second reactant to the denitrification bin 32 to ensure that the supply of the second reactant meets the demand.

[0060] In some embodiments, the solvent includes an aqueous solution, magnesium hydroxide or calcium hydroxide, wherein the aqueous solution, magnesium hydroxide and calcium hydroxide can react with boron oxide to absorb boron oxide in flue gas, and a suitable solvent can be selected according to actual needs.

[0061] In some embodiments, the solvent is an aqueous solution, which can reduce the cost of raw materials. When the solvent is an aqueous solution, the liquid separated by the gas-liquid separation component 2 is water, and the separated water can flow back into the mixing drum 11 through the drainage pipe 7 described below for recycling, further reducing the cost of raw materials.

[0062] In some embodiments, the first reactant includes slaked lime or sodium carbonate. Desulfurization can be performed by spraying slaked lime or sodium carbonate toward the desulfurization bin 31, and the selection can be made according to actual needs.

[0063] In some embodiments, the first reactant includes slaked lime. At this time, part of the slaked lime enters the subsequent denitrification bin 32 and the dust removal assembly 4 along with the flue gas. This part of the slaked lime can be fed back to the desulfurization bin 31 through the first return pipe 33 and the second return pipe 34, respectively, saving raw material costs.

[0064] In some embodiments, the second reactant includes aqueous ammonia, liquid ammonia or urea. Nitrogen oxides in the flue gas can be removed by spraying aqueous ammonia, liquid ammonia or urea toward the denitrification bin 32, and the selection can be made according to actual needs.

[0065] In some embodiments, the second reactant includes aqueous ammonia, which is mixed with flue gas. The mixed aqueous ammonia can react with the flue gas to perform denitrification and reduce denitrification.

[0066] In some embodiments, the flue gas treatment device further includes an induced draft fan 6 , which is disposed on the flue gas conveying duct 41 of the dust removal assembly 4 .

[0067] In this design, the induced draft fan 6 is used to form negative pressure to drive the flow of smoke, thereby providing power for the circulation of smoke and ensuring stable operation of the system.

[0068] In some embodiments, the liquid discharge port of the gas-liquid separation component 2 is connected to the stirring component 1 via a liquid discharge pipe 7 .

[0069] Under this design, the solvent separated by the gas-liquid separation component 2 can flow back into the stirring component 1 through the drainage pipe 7, so that the solvent can be recycled and the operating cost can be reduced.

[0070] In some embodiments, the drainage pipe 7 is also connected to a diversion pipe 71 .

[0071] In this design, excess solvent (water) can be discharged to the target location through the bypass pipe 71, avoiding excessive aqueous solution in the system and meeting the stable operation requirements of the system.

[0072] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0073] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A flue gas treatment device, characterized in that: include: A stirring component (1) is used to introduce flue gas, wherein the stirring component (1) contains a solvent for absorbing boron oxide in the flue gas; A gas-liquid separation component (2) is used to receive the smoke delivered by the stirring component (1) and separate the liquid from the smoke; A desulfurization and denitration component (3) is used to receive the flue gas separated by the gas-liquid separation component (2), the desulfurization and denitration component (3) comprising a desulfurization chamber (31) and a denitration chamber (32), the desulfurization chamber (31) being capable of introducing a first reactant for absorbing sulfides in the flue gas, and the denitration chamber (32) being capable of introducing a second reactant for absorbing nitrogen oxides in the flue gas; A dust removal component (4) is used to receive the flue gas output by the desulfurization and denitrification component (3) and perform dust removal on the flue gas; as well as A circulating flue (5), one end of which is connected to the flue gas conveying duct (41) of the dust removal component (4), and the other end of which is connected to the air inlet duct (13) of the stirring component (1).

2. The flue gas treatment device according to claim 1, characterized in that: The stirring assembly (1) comprises a stirring drum (11), a cavity for containing the solvent is formed inside the stirring drum (11), and a stirring shaft (12) for stirring the solvent is rotatably arranged inside the stirring drum (11).

3. The flue gas treatment device according to claim 1, characterized in that: The air inlet of the desulfurization bin (31) is connected to the air outlet of the gas-liquid separation component (2), the air inlet of the denitrification bin (32) is connected to the air outlet of the desulfurization bin (31), and the air inlet of the dust removal component (4) is connected to the air outlet of the denitrification bin (32).

4. The flue gas treatment device according to claim 3, characterized in that: The bottom of the denitrification bin (32) is connected to the desulfurization bin (31) via a first reflux pipe (33), and the first reactant precipitated in the denitrification bin (32) flows back into the desulfurization bin (31) via the first reflux pipe (33).

5. The flue gas treatment device according to claim 3, characterized in that: The bottom of the dust removal component (4) is connected to the desulfurization bin (31) via a second reflux pipe (34), and the first reactant separated by the dust removal component (4) flows back into the desulfurization bin (31) via the second reflux pipe (34).

6. The flue gas treatment device according to claim 1, characterized in that: The desulfurization and denitrification component (3) further comprises a first supply bin (35) for supplying the first reactant toward the desulfurization bin (31); And / or, the desulfurization and denitrification component (3) further comprises a second supply bin (36) for supplying the second reactant toward the denitrification bin (32).

7. The flue gas treatment device according to claim 1, characterized in that: The solvent includes an aqueous solution, magnesium hydroxide or calcium hydroxide; and / or, the first reactant comprises slaked lime or sodium carbonate; And / or, the second reactant includes aqueous ammonia, liquid ammonia or urea.

8. The flue gas treatment device according to claim 1, characterized in that: The flue gas treatment device further comprises an induced draft fan (6), and the induced draft fan (6) is arranged on the flue gas conveying pipeline (41) of the dust removal component (4).

9. The flue gas treatment device according to claim 1, characterized in that: The liquid discharge port of the gas-liquid separation component (2) is connected to the stirring component (1) via a liquid discharge pipe (7).

10. The flue gas treatment device according to claim 9, characterized in that: The liquid discharge pipe (7) is also connected to a diversion pipe (71).

Images