CN218379432U - Flue gas treatment system - Google Patents

Abstract

The application discloses flue gas processing system. This system is applicable to synthetic gas biological fermentation technical field, the fermentation tail gas of this system burns the exhanst gas outlet of system and the first entry of heat exchanger and passes through first pipe connection, the first entry setting of circulation absorption tower is at the liquid layer and sprays between the layer, the first export setting of circulation absorption tower is at the top of circulation absorption tower, the second entry of circulation absorption tower and the second export of circulation absorption tower all set up in the bottom of circulation absorption tower, the third entry of circulation absorption tower corresponds the setting with the layer that sprays, the first export of heat exchanger passes through second pipe connection with the first entry of circulation absorption tower, aqueous ammonia atomizing device sets up on the second pipeline, the first export of circulation absorption tower passes through third pipe connection with the second entry of heat exchanger. This application can separate, absorb and retrieve the circulation to the sulfur dioxide in the fermentation tail gas system exhaust flue gas, has effectively reduced environmental pollution, has avoided the wasting of resources.

Description

Flue gas treatment system

Technical Field

The application belongs to the technical field of synthetic gas biological fermentation, and particularly relates to a flue gas treatment system.

Background

In the process of preparing fuel ethanol by using industrial tail gas fermentation, sulfur element needs to be added to promote the growth of thalli and metabolize to produce ethanol. After being utilized by microorganisms in a fermentation tank, the sulfur element is mainly released into fermentation tail gas in a hydrogen sulfide form, and meanwhile, the fermentation tail gas also contains a small amount of sulfur-containing organic matters such as carbon disulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide and the like, and an incineration system is needed to incinerate the fermentation tail gas so as to convert various sulfur-containing substances into sulfur dioxide, but if the sulfur dioxide-containing flue gas is directly discharged without treatment, the harmful effects on the surrounding environment are caused, and the waste of resources is caused.

SUMMERY OF THE UTILITY MODEL

The application aims at solving the technical problem that the generated flue gas contains sulfur dioxide after the fermentation tail gas is incinerated by an incineration system to a certain extent. Therefore, the application provides a flue gas treatment system.

The technical scheme of the application is as follows:

the application provides a flue gas treatment system, the system includes:

the heat exchanger is provided with a first inlet, a first outlet, a second inlet and a second outlet, wherein the first inlet of the heat exchanger is communicated with the first outlet of the heat exchanger, and the second inlet of the heat exchanger is communicated with the second outlet of the heat exchanger;

the flue gas outlet of the fermentation tail gas incineration system is connected with the first inlet of the heat exchanger through the first pipeline;

the device comprises a circulating absorption tower, a liquid layer, a spraying layer and a demisting layer are arranged in the circulating absorption tower from bottom to top, a first inlet, a first outlet, a second inlet, a second outlet and a third inlet are arranged on the circulating absorption tower, the first inlet of the circulating absorption tower is arranged between the liquid layer and the spraying layer, the first outlet of the circulating absorption tower is arranged at the top of the circulating absorption tower, the second inlet of the circulating absorption tower and the second outlet of the circulating absorption tower are arranged at the bottom of the circulating absorption tower, and the third inlet of the circulating absorption tower is arranged corresponding to the spraying layer;

a second line through which the first outlet of the heat exchanger is connected with the first inlet of the cyclic absorption tower;

the ammonia water atomization device is arranged on the second pipeline;

a third line through which the first outlet of the cyclic absorption tower is connected with the second inlet of the heat exchanger;

a fourth line, an inlet of the fourth line is communicated with the third line, and an outlet of the fourth line is connected with the second inlet of the circulating absorption tower;

the induced draft fan is arranged on the third pipeline and is arranged between an inlet of the fourth pipeline and the heat exchanger;

a fifth line through which the second outlet of the cyclic absorption tower is connected with the third inlet of the cyclic absorption tower;

and the first pump body is arranged on the fifth pipeline.

Optionally, the ammonia water atomizing device includes:

a spray outlet of the two-fluid atomization spray gun is communicated with the second pipeline;

an ammonia water preparation tank;

the outlet of the ammonia water configuration tank is connected with the liquid inlet of the two-fluid atomization spray gun through a sixth pipeline;

the second pump body is arranged on the sixth pipeline;

an air compressor;

and the outlet of the air compressor is connected with the gas inlet of the two-fluid atomization spray gun through the seventh pipeline.

Further, the system is provided with more than two-fluid atomization spray guns

Optionally, the ammonia water atomizing device includes:

a direct injection atomizing nozzle, an outlet of the direct injection atomizing nozzle being in communication with the second pipeline;

an ammonia water preparation tank;

the outlet of the ammonia water configuration tank is connected with the inlet of the direct injection type atomizing nozzle through a sixth pipeline;

and the second pump body is arranged on the sixth pipeline.

Further, the system further comprises an eighth pipeline, wherein the inlet of the eighth pipeline is communicated with the fifth pipeline, the outlet of the eighth pipeline is connected with the inlet of the fermentation system, and the inlet of the eighth pipeline is arranged between the first pump body and the third inlet of the circulating absorption tower.

Further, the system further comprises a regulating valve disposed on the eighth line.

Further, the height of the inlet of the fourth line is greater than the height of the liquid layer and less than the height of the outlet of the third line.

Further, a rotating plate is arranged in the third pipeline and is arranged between the first outlet of the circulating absorption tower and the inlet of the fourth pipeline.

Further, the spraying layer is provided with a plurality of atomizing nozzles.

Further, the system also comprises a chimney, and the second outlet of the heat exchanger is connected with the inlet of the chimney through a ninth pipeline.

The embodiment of the application has at least the following beneficial effects:

the application provides a flue gas processing system, the high temperature flue gas of fermentation tail gas incineration system is cooled down in getting into the heat exchanger by first pipeline, in order to avoid high temperature to the equipment in this system to cause the destruction, flue gas after the cooling gets into in the second pipeline, sulfur dioxide in the flue gas reacts with aqueous ammonia atomizing device spun aqueous ammonia and forms the ammonium sulfate, ammonium sulfite etc. exist with the aerosol form material, at this moment, not only contain substances such as ammonium sulfate, ammonium sulfite in the flue gas, still contain a small amount of ammonia, subsequently, in the flue gas gets into the circulation absorption tower, ammonia in the flue gas, substances such as ammonium sulfate, ammonium sulfite are absorbed to the water smoke of spraying layer blowout of circulation absorption tower, then drip in the liquid level of circulation absorption tower, the flue gas absorbed by the water mist of the spraying layer continuously upwards passes through the demisting layer, mist particles, slurry drops and the like in the flue gas are collected by a demister in the demisting layer, the flue gas treated by the circulating absorption tower enters a third pipeline, liquid drops formed by condensation of liquid in the flue gas in the third pipeline flow into a liquid layer of the circulating absorption tower through a fourth pipeline, so that the liquid dissolved with ammonia, ammonium sulfate, ammonium sulfite and other substances in the flue gas is fully separated, the dehydrated flue gas continuously enters a heat exchanger along the third pipeline under the action of negative pressure of an induced draft fan and exchanges heat with high-temperature flue gas entering the heat exchanger through a fermentation tail gas incineration system, the temperature of the flue gas is raised, the dew point is raised, white smoke is eliminated, and the purified flue gas is discharged through a second outlet of the heat exchanger. In addition, the liquid in the liquid layer of the circulating absorption tower is pumped into the fifth pipeline through the first pump body through the fifth pipeline and the first pump body, and the liquid in the fifth pipeline is sprayed out of the spray nozzles of the spraying layer of the circulating absorption tower, so that the recycling of the liquid is realized.

In conclusion, the flue gas treatment system that this application provided can separate, absorb and retrieve the circulation to the sulfur dioxide in the fermentation tail gas system exhaust flue gas, has effectively reduced environmental pollution, has avoided the wasting of resources.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a flue gas treatment system according to an embodiment of the present application.

Reference numerals:

10-a heat exchanger; 20-a first line; 30-ammonia water atomization plant; 31-a two-fluid atomizing spray gun; preparing a 32-ammonia water tank; 33-a sixth line; 34-a second pump body; 35-an air compressor; 36-seventh line; 40-a circulating absorption tower; 41-a liquid layer; 42-a spray layer; 43-a defogging layer; 50-a second line; 60-a third line; 70-a fourth line; 80-induced draft fan; 90-a fifth line; 100-a first pump body; 110-an eighth line; 120-a chimney; 130-ninth line.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The application is described below with reference to specific embodiments in conjunction with the following drawings:

fig. 1 is a flue gas treatment system according to an embodiment of the present disclosure, and with reference to fig. 1, the system includes a heat exchanger 10, a first pipeline 20, an ammonia water atomization device 30, a circulating absorption tower 40, a second pipeline 50, a third pipeline 60, a fourth pipeline 70, an induced draft fan 80, a fifth pipeline 90, and a first pump body 100.

The heat exchanger 10 in the embodiment of the application is provided with a first inlet, a first outlet, a second inlet and a second outlet, wherein the first inlet of the heat exchanger 10 is communicated with the first outlet of the heat exchanger 10, the second inlet of the heat exchanger 10 is communicated with the second outlet of the heat exchanger 10, a flue gas outlet of the fermentation tail gas incineration system is connected with the first inlet of the heat exchanger 10 through a first pipeline 20, a liquid layer 41, a spraying layer 42 and a defogging layer 43 are arranged inside a circulating absorption tower 40 from bottom to top, the circulating absorption tower 40 is provided with the first inlet, the first outlet, the second inlet, the second outlet and a third inlet, wherein the first inlet of the circulating absorption tower 40 is arranged between the liquid layer 41 and the spraying layer 42, the first outlet of the circulating absorption tower 40 is arranged at the top of the circulating absorption tower 40, the second inlet of the circulating absorption tower 40 and the second outlet of the circulating absorption tower 40 are both arranged at the bottom of the circulating absorption tower 40, the third inlet of the circulating absorption tower 40 is arranged corresponding to the spray layer 42, the first outlet of the heat exchanger 10 is connected with the first inlet of the circulating absorption tower 40 through the second pipeline 50, the ammonia water atomization device 30 is arranged on the first pipeline 20, the first outlet of the circulating absorption tower 40 is connected with the second inlet of the heat exchanger 10 through the third pipeline 60, the inlet of the fourth pipeline 70 is communicated with the third pipeline 60, the outlet of the fourth pipeline 70 is connected with the second inlet of the circulating absorption tower 40, the induced draft fan 80 is arranged on the third pipeline 60 and is arranged between the inlet of the fourth pipeline 70 and the heat exchanger 10, the second outlet of the circulating absorption tower 40 is connected with the third inlet of the circulating absorption tower 40 through the fifth pipeline 90, and the first pump body 100 is arranged on the fifth pipeline 90.

Specifically, with reference to fig. 1, high-temperature flue gas of the fermentation tail gas incineration system enters the heat exchanger 10 through the first pipeline 20 to be cooled so as to avoid damage to equipment in the system due to high temperature, the cooled flue gas enters the second pipeline 50, sulfur dioxide in the flue gas reacts with ammonia water sprayed by the ammonia water atomization device 30 to form ammonium sulfate, ammonium sulfite and other substances in aerosol form, at this time, the flue gas contains not only ammonium sulfate, ammonium sulfite and other substances but also a small amount of ammonia, then, the flue gas enters the circulation absorption tower 40, the water mist sprayed by the spray layer 42 of the circulation absorption tower 40 absorbs the ammonia, ammonium sulfate, ammonium sulfite and other substances in the flue gas, then, the flue gas drops into the liquid layer 41 of the circulation absorption tower 40, the flue gas absorbed by the water mist of the spray layer 42 continues to pass through the mist removal layer 43, mist particles, slurry drops and the like in the flue gas are captured by the demister in the mist removal layer 43, the flue gas treated by the circulation absorption tower 40 enters the third pipeline 60, the flue gas drops formed by the demister in the third pipeline 60 after condensation enter the circulation absorption tower 70 to be fully purified by the circulation absorption line 80 of the flue gas, the flue gas is discharged into the heat exchanger 10, and the high-temperature-rising flue gas heat exchanger 10, the flue gas is fully removed, and the flue gas is discharged from the second pipeline 80, the high-temperature-condensation system, and the flue gas heat exchanger 10, and the flue gas heat exchanger, and the flue gas is discharged by the high-condensation system, and the high-condensation system. Further, the liquid in the liquid layer 41 of the circulating absorption tower 40 is drawn into the fifth line 90 through the fifth line 90 and the first pump body 100, and the liquid in the fifth line 90 is sprayed out again from the nozzles of the spray layer 42 of the circulating absorption tower 40, thereby recycling the liquid.

In the embodiment of the application, the system is not only suitable for treating the sulfur-containing flue gas generated by the fermentation tail gas incineration system, but also suitable for treating the sulfur-containing flue gas generated by other production systems, and the embodiment of the application does not limit the treatment.

Optionally, with reference to fig. 1, the ammonia water atomization device 30 includes a two-fluid atomization spray gun 31, an ammonia water configuration tank 32, a sixth pipeline 33, a second pump body 34, an air compressor 35, and a seventh pipeline 36, wherein a spray outlet of the two-fluid atomization spray gun 31 is communicated with the second pipeline 50, an outlet of the ammonia water configuration tank 32 is connected with a liquid inlet of the two-fluid atomization spray gun 31 through the sixth pipeline 33, the second pump body 34 is disposed on the sixth pipeline 33, and an outlet of the air compressor 35 is connected with a gas inlet of the two-fluid atomization spray gun 31 through the seventh pipeline 36.

Specifically, with reference to fig. 1, the ammonia water in the ammonia water preparation tank 32 can be pressurized by the second pump body 34 and then enters the two-fluid atomization spray gun 31 through the sixth pipeline 33, meanwhile, the air can be pressurized by the air compressor 35 and then enters the two-fluid atomization spray gun 31 through the seventh pipeline 36, the pressurized ammonia water and the compressed air interact with each other in the two-fluid atomization spray gun 31, and water mist is formed at the spray outlet of the two-fluid atomization spray gun 31 and sprayed out, so that the atomized ammonia water and the flue gas in the second pipeline 50 can fully react.

In the embodiment of the application, the system is provided with more than one two-fluid atomization spray gun 31, so that the content of atomized ammonia water is improved by adjusting the number of the two-fluid atomization spray guns 31, and the chemical reaction of the ammonia water and flue gas is further ensured.

Of course, the ammonia water atomizing device 30 in the embodiment of the present application may also include a direct-injection atomizing nozzle, an ammonia water configuration tank 32, a sixth pipeline 33, and a second pump body 34, wherein an outlet of the direct-injection atomizing nozzle is communicated with the second pipeline 50, an outlet of the ammonia water configuration tank 32 is connected with an inlet of the direct-injection atomizing nozzle through the sixth pipeline 33, and the second pump body 34 is disposed on the sixth pipeline 33.

Specifically, referring to fig. 1, the ammonia water in the ammonia water configuration tank 32 can be pressurized by the second pump body 34 and then enters the direct-injection atomizing nozzle through the sixth pipeline 33, and under the combined action of the pressurized ammonia water and the direct-injection atomizing nozzle, the atomized ammonia water is sprayed out from the outlet of the direct-injection atomizing nozzle, compared with the ammonia water atomizing device 30 adopting the two-fluid atomizing spray gun 31, the ammonia water atomizing device 30 adopting the direct-injection atomizing nozzle needs to adopt the second pump body 34 with higher power because no compressed air source is provided, so as to pressurize the ammonia water to a higher pressure value, and ensure the atomizing effect.

In this application embodiment, this system is provided with the direct injection formula atomizing nozzle more than one to through the quantity of adjusting the direct injection formula atomizing nozzle, improve the content of atomizing aqueous ammonia, further guarantee the chemical reaction of aqueous ammonia and flue gas.

Further, referring to fig. 1, the system further includes an eighth pipeline 110, an inlet of the eighth pipeline 110 is communicated with the fifth pipeline 90, and an outlet of the eighth pipeline 110 is connected to an inlet of the fermentation system, wherein the inlet of the eighth pipeline 110 is disposed between the first pump body 100 and the third inlet of the circulating absorption tower 40. The liquid absorbed by the liquid layer 41 of the circulating absorption tower 40, such as ammonia, ammonium sulfate, ammonium sulfite, etc., is discharged into a fermentation system to provide a nitrogen source and a sulfur source for fermentation, thereby achieving the purposes of desulfurization of fermentation tail gas and sulfur recycling.

Referring to fig. 1, the system further includes an adjusting valve disposed on the eighth pipeline 110 to control the flow rate of the liquid discharged from the circular absorption tower 40 into the fermentation system, so as to ensure that the liquid level of the liquid layer 41 of the circular absorption tower 40 meets the usage requirement of the circular absorption tower 40.

In the embodiment of the present application, the height of the inlet of the fourth pipeline 70 is greater than the height of the liquid layer 41 and less than the height of the outlet of the third pipeline 60, so as to avoid the liquid in the liquid layer 41 overflowing into the third pipeline 60.

In this application embodiment, be provided with the rotor plate more than the one deck in the third pipeline 60, the rotor plate setting is between the first export of circulation absorption tower 40 and the entry of fourth pipeline 70, and after the flue gas got into the whirl board, because the effect of whirl board produces centrifugal force, the liquid in the flue gas is gathered on the inner wall of third pipeline 60 with higher speed and is formed the comdenstion water to improve the effect of flue gas dehydration.

In the embodiment of the application, spray layer 42 and be provided with a plurality of atomizing nozzle to guarantee to spray layer 42 and can spout enough substances such as ammonia, ammonium sulfate, ammonium sulfite in the water smoke absorption, in addition, can also spray layer 42 through setting up the number of more layers, in order to further improve the absorption effect, this application embodiment does not do the restriction to this.

In the embodiment of the application, the defogging layer 43 can adopt a flat-plate type defogger, a ridge type defogger, a tube bundle type defogger and the like, and can further improve the trapping effect by arranging more defogging layers 43. Because the flue gas that enters into this system can carry out the heat transfer cooling in heat exchanger 10 to be favorable to the part in the protection circulation absorption tower 40, make the defroster can use materials such as polypropylene, glass steel, with reduction investment cost, this application embodiment is all not do the restriction to this.

Further, the system further comprises a chimney 120, the second outlet of the heat exchanger 10 is connected with the inlet of the chimney 120 through a ninth pipeline 130, so as to promote the emission of the flue gas through the chimney 120 and reduce the influence on the surrounding environment when the flue gas is discharged to the high altitude, and in addition, the flue gas entering the chimney 120 has high temperature and low white smoke content, thereby being beneficial to reducing corrosion and prolonging the service life of the chimney 120.

In conclusion, the flue gas treatment system provided by the application can separate, absorb and recycle the sulfur dioxide in the flue gas discharged by the fermentation tail gas incineration system, so that the environmental pollution is effectively reduced, and the resource waste is avoided.

In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise" indicate orientations or positional relationships based on the orientation or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.

It should be noted that all the directional indications in the embodiments of the present application are only used for explaining the relative position relationship, the motion condition, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed correspondingly. In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be. Furthermore, descriptions in this application as to "first," "second," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope claimed in the present application.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A flue gas treatment system, characterized in that the system comprises:

a heat exchanger (10) provided with a first inlet, a first outlet, a second inlet and a second outlet, wherein the first inlet of the heat exchanger (10) is communicated with the first outlet of the heat exchanger (10), and the second inlet of the heat exchanger (10) is communicated with the second outlet of the heat exchanger (10);

a first pipeline (20), wherein a smoke outlet of the fermentation tail gas incineration system is connected with a first inlet of the heat exchanger (10) through the first pipeline (20);

the recycling absorption tower (40) is internally provided with a liquid layer (41), a spraying layer (42) and a defogging layer (43) from bottom to top, the recycling absorption tower (40) is provided with a first inlet, a first outlet, a second inlet, a second outlet and a third inlet, wherein the first inlet of the recycling absorption tower (40) is arranged between the liquid layer (41) and the spraying layer (42), the first outlet of the recycling absorption tower (40) is arranged at the top of the recycling absorption tower (40), the second inlet of the recycling absorption tower (40) and the second outlet of the recycling absorption tower (40) are both arranged at the bottom of the recycling absorption tower (40), and the third inlet of the recycling absorption tower (40) is arranged corresponding to the spraying layer (42);

a second line (50) through which the first outlet of the heat exchanger (10) and the first inlet of the cyclic absorption column (40) are connected;

an ammonia water atomization device (30) arranged on the second pipeline (50);

a third line (60) through which the first outlet of the circulating absorption column (40) and the second inlet of the heat exchanger (10) are connected;

a fourth line (70), an inlet of the fourth line (70) being in communication with the third line (60), an outlet of the fourth line (70) being connected to the second inlet of the circulating absorption column (40);

the induced draft fan (80) is arranged on the third pipeline (60) and is arranged between the inlet of the fourth pipeline (70) and the heat exchanger (10);

a fifth line (90) through which the second outlet of the circulating absorption column (40) and the third inlet of the circulating absorption column (40) are connected;

a first pump body (100) arranged on the fifth pipeline (90).

2. The flue gas treatment system according to claim 1, wherein the ammonia atomization device (30) comprises:

a two-fluid atomization lance (31), the spray outlet of said two-fluid atomization lance (31) being in communication with said second line (50);

an ammonia water preparation tank (32);

a sixth pipeline (33), through which the outlet of the ammonia water configuration tank (32) and the liquid inlet of the two-fluid atomization spray gun (31) are connected;

a second pump body (34) arranged on the sixth line (33);

an air compressor (35);

a seventh line (36), through which seventh line (36) the outlet of the air compressor (35) is connected with the gas inlet of the two-fluid atomization lance (31).

3. A flue gas treatment system according to claim 2, wherein the system is provided with more than two of the two-fluid atomizing lances (31).

4. The flue gas treatment system according to claim 1, wherein the ammonia atomization device (30) comprises:

a direct atomizing nozzle, the outlet of which communicates with the second line (50);

an ammonia water preparation tank (32);

a sixth pipeline (33), wherein the outlet of the ammonia water configuration tank (32) is connected with the inlet of the direct injection atomizing nozzle through the sixth pipeline (33);

a second pump body (34) arranged on the sixth pipeline (33).

5. The flue gas treatment system according to claim 1, further comprising an eighth line (110), an inlet of the eighth line (110) being in communication with the fifth line (90), an outlet of the eighth line (110) being connected to an inlet of a fermentation system, wherein the inlet of the eighth line (110) is arranged between the first pump body (100) and the third inlet of the circulating absorption tower (40).

6. The flue gas treatment system according to claim 5, wherein the system further comprises a regulating valve, which is arranged on the eighth line (110).

7. The flue gas treatment system of claim 1, wherein the inlet of the fourth line (70) has a height greater than the height of the liquid layer (41) and less than the height of the outlet of the third line (60).

8. The flue gas treatment system of claim 1, wherein a rotating plate is disposed within the third line (60), the rotating plate being disposed between the first outlet of the circulating absorption tower (40) and the inlet of the fourth line (70).

9. The flue gas treatment system of claim 1 wherein the spray layer (42) is provided with a plurality of atomizing nozzles.

10. A flue gas treatment system according to any of claims 1 to 9, wherein the system further comprises a stack (120), the second outlet of the heat exchanger (10) being connected to the inlet of the stack (120) by a ninth line (130).

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