CN115430290A

CN115430290A - Flue gas washing system

Info

Publication number: CN115430290A
Application number: CN202211194180.2A
Authority: CN
Inventors: 倪伟; 薛京; 陆逸; 侯进; 张晓康; 李明祥; 谭文阳; 宋天宇; 张圆飞; 张建锋
Original assignee: 711th Research Institute of CSIC
Current assignee: 711th Research Institute of CSIC
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2022-12-06

Abstract

The application discloses flue gas washing system includes: the washing device is provided with a washing cavity, a smoke inlet and a smoke outlet which are communicated with the washing cavity; the flue gas input pipeline comprises a bent pipe section and an extending pipe section which are adjacent, the bent pipe section is communicated with the gas inlet, and the flue gas input pipeline is used for inputting flue gas to the washing cavity; and at least one group of spraying components are arranged in the washing cavity so as to provide washing liquid for washing the flue gas for the washing cavity. This application flue gas washing system can prevent that the washing liquid from falling the problem of flue gas input pipeline.

Description

Flue gas washing system

Technical Field

The application relates to the technical field of energy conservation and environmental protection, in particular to a flue gas washing system.

Background

The marine desulfurization tower is generally divided into a U-shaped desulfurization tower and an I-shaped desulfurization tower according to the direction of flue gas of a marine diesel engine entering the desulfurization tower. In U type desulfurizing tower, in the intake pipe entering desulfurizing tower of flue gas through the desulfurizing tower side, then discharge from the gas vent on desulfurizing tower top, the flue gas flow direction shape of desulfurizing tower is similar to the U type this moment. In the I-shaped desulfurizing tower, flue gas enters from an inlet at the bottom end of the desulfurizing tower and is discharged from an exhaust port at the top end of the desulfurizing tower, and the flow direction of the flue gas of the desulfurizing tower is similar to the I shape.

Wherein the conventional U-shaped desulfurizing tower uses the filler as a main contact reaction area for spraying slurry and waste gas in a main tower body, but Mg (OH) is generated due to the structural characteristic of a corrugated type of a filler pore plate ₂ After the slurry is sprayed on the filler, suspended particles in the slurry can continuously deposit on the surface of the filler, so that a pore plate corrugated structure of the filler is gradually blocked, the contact area of reaction is reduced, the problems of filler flooding, overlarge waste gas pressure difference between the front and the back of a filler unit and the like are caused, the pressure drop of a desulfurization system exceeds the allowable range of a diesel engine, and the service life of the diesel engine is adversely affected.

And the conventional I-type desulfurizing tower is provided with a plurality of layers of spraying devices, and the reaction of the spraying slurry and the flue gas is completed by the flue gas passing through a liquid film formed by the spraying slurry. However, the conventional I-type desulfurization tower has the following two defects that the air inlet of the I-type tower is arranged at the bottom of the tower, the washing liquid falls from the top, although the I-type desulfurization tower is provided with the water retaining structure, the washing liquid falls at a higher position and collides and splashes with a multiple structure, and in addition, the washing liquid falls into the air inlet due to the shaking in the sailing process of the ship, so that the diesel engine is seriously damaged.

Therefore, it is desirable to design a flue gas scrubbing system to solve the above problems.

Disclosure of Invention

The application provides a flue gas washing system to prevent that the washing liquid from falling to the problem of flue gas input pipeline.

To achieve the above object, in one aspect, the present application provides a flue gas scrubbing system, including:

the washing device is provided with a washing cavity, a smoke inlet and a smoke outlet which are communicated with the washing cavity;

the flue gas input pipeline comprises a bent pipe section and an extending pipe section which are adjacent, the bent pipe section is communicated with the gas inlet, and the flue gas input pipeline is used for inputting flue gas to the washing cavity; and (c) a second step of,

at least one group of spraying assemblies are arranged in the washing cavity to provide washing liquid for washing the flue gas for the washing cavity.

Optionally, in some embodiments of the present application, the washing device has a top, a bottom, and a sidewall for enclosing the washing chamber, the sidewall being connected to the top and the bottom;

the flue gas outlet is arranged at the top of the washing device, and the flue gas inlet is arranged on the side wall of the washing device.

Optionally, in some embodiments of the present application, the extension pipe section extends in a direction substantially parallel to a flow direction of the flue gas in the scrubbing chamber, such that the scrubbing chamber and the flue gas input line form a U-shaped flue gas flow path.

Optionally, in some embodiments of the present application, the extension pipe section is provided with a cooling liquid inlet and a vent;

the vent is located downstream of the coolant inlet in the direction of flow of the flue gas.

Optionally, in some embodiments of the present application, the number of the spraying assemblies is multiple, and the multiple groups of the spraying assemblies are arranged at intervals along the flow direction of the flue gas.

Optionally, in some embodiments of the present application, the washing device is provided with at least one liquid outlet communicating with the washing chamber, and the washing liquid in the washing chamber flows out of the washing chamber through the liquid outlet.

Optionally, in some embodiments of the present application, a water diversion assembly is disposed in the washing chamber, and the water diversion assembly is located between the flue gas inlet and the flue gas outlet along a flue gas flow direction;

the spraying assemblies are in multiple groups, and the multiple groups of spraying assemblies comprise a first spraying assembly and a second spraying assembly; along the flue gas flow direction, first spray assembly is located divide the water subassembly with between the flue gas import, second spray assembly is located divide the water subassembly with between the flue gas export.

Optionally, in some embodiments of this application, be equipped with a plurality of spray assembly access holes on the washing device, it is a plurality of the spray assembly access hole all communicates the washing chamber, wherein a part the spray assembly access hole is followed the flue gas flow direction divide water assembly upstream, another part the spray assembly access hole is followed the flue gas flow direction divide water assembly downstream.

Optionally, in some embodiments of the present application, a water-blocking assembly is disposed in the washing chamber, and the water-blocking assembly is disposed downstream of the water diversion assembly and upstream of the flue gas outlet along the flue gas flowing direction.

Optionally, in some embodiments of the present application, the washing device is provided with a first liquid discharge port and a second liquid discharge port, which communicate with the washing chamber, wherein:

the first liquid discharge port is formed in the bottom of the washing device and communicated with the washing cavity, and washing liquid sprayed by the first spraying assembly is discharged out of the washing cavity through the first liquid discharge port;

the second liquid outlet is formed in the side wall of the washing device and communicated with the washing cavity, and washing liquid sprayed by the second spraying assembly is discharged out of the washing cavity through the second liquid outlet.

Optionally, in some embodiments of the present application, a plurality of liquid level alarms are disposed in the washing chamber.

Optionally, in some embodiments of the present application, at least one demister is disposed in the washing chamber, and the demister is located between the spray assembly and the flue gas outlet along the flue gas flow direction.

Optionally, in some embodiments of the present application, the scrubbing device further has a demister access opening in communication with the scrubbing chamber, the demister access opening being located between the demister and the flue gas outlet in the flue gas flow direction.

Optionally, in some embodiments of the present application, at least one flushing assembly is disposed in the washing chamber, and the flushing assembly is located on a side of the demister close to the flue gas outlet to flush the demister.

Compared with the prior art, this application flue gas washing system is including washing device, flue gas input pipeline and the spray assembly that has washing chamber, flue gas inlet and exhanst gas outlet. The flue gas input pipeline comprises a bent pipe section and an extending pipe section which are adjacent, and the bent pipe section is communicated with the flue gas inlet. The spraying assembly is arranged in the washing cavity to supply washing liquid to the washing cavity. The flue gas washing system can adopt the spraying layer as a reaction area of the washing liquid and the flue gas, and the washing cavity is not provided with the filler, so that the problem of filler blockage is avoided; and the bent pipe section is communicated with the smoke inlet, so that the flow path of the smoke passing through the smoke input pipeline is U-shaped, the cleaning solution is prevented from flowing into the smoke input pipeline, and the problem that the cleaning solution seriously damages the diesel engine can be prevented.

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 only 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 diagram of a flue gas scrubbing system provided in accordance with an embodiment of the present application.

The main reference numbers in the drawings accompanying the present specification are as follows:

100-flue gas scrubbing system; 10-a washing device; 11-top; 12-bottom; 13-a side wall; 101-a washing chamber; 102-a flue gas inlet; 103-a flue gas outlet; 104-a first drain; 105-a second drain port; 106-first spray assembly service port; 107-second spray assembly access opening; 108-demister access ports; 20-flue gas input pipeline; 21-bending the pipe section; 22-an extension pipe section; 201-cooling fluid inlet; 202-a vent; 30-a spray assembly; 31-a first spray assembly; 32-a second spray assembly; 40-a water diversion component; 50-a water retaining component; 60-a demister; 70-a flushing assembly; 80-liquid level alarm; 81-a first level alarm; 82-second level alarm.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below 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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1, the present application provides a flue gas scrubbing system 100, wherein the flue gas scrubbing system 100 includes a scrubbing device 10, a flue gas input line 20, and a spray assembly 30. The washing device 10 has a washing chamber 101, a flue gas inlet 102 and a flue gas outlet 103, wherein the flue gas inlet 102 and the flue gas outlet 103 are respectively communicated with the washing chamber 101. The flue gas input pipeline 20 comprises an adjacent bent pipe section 21 and an adjacent extension pipe section 22, and the bent pipe section 21 is communicated with the flue gas inlet 102. The spray assembly 30 is disposed within the washing chamber 101 to supply washing liquid to the washing chamber 101.

Compared with the prior art, the flue gas washing system 100 of the present application can adopt the spraying layer as the reaction area of the washing liquid and the flue gas by arranging the spraying component 30 in the washing cavity 101, and does not arrange the filler in the washing cavity 101, so that the problem of filler blockage is avoided; in addition, as the washing cavity 101 is not provided with the filler, the flow speed of the flue gas is faster, the diameter of the washing cavity 101 can be smaller, and the arrangement space is greatly saved. Meanwhile, the flue gas input pipeline 20 is provided with the adjacent bent pipe section 21 and the adjacent extension pipe section 22, and the bent pipe section 21 is communicated with the flue gas inlet 102, so that the flow path of the flue gas passing through the flue gas input pipeline 20 is U-shaped, the washing liquid is prevented from flowing into the flue gas input pipeline 20, and the problem that the washing liquid causes serious damage to the diesel engine can be prevented.

In particular implementations, the flue gas scrubbing system described herein is configured as a marine desulfurization system. At this time, the washing apparatus 10 is configured as a U-shaped washing tower based on a magnesium-based method.

In some embodiments, the washing device 10 has a top 11, a bottom 12, and a sidewall 13 for enclosing the washing chamber 101, the sidewall 13 being connected to the top 11 and the bottom 12. In other words, the side wall 13 is located between the top portion 11 and the bottom portion 12 and is connected with the top portion 11 and the bottom portion 12 to enclose the washing chamber 101.

Based on the above embodiment, the flue gas outlet 103 is disposed at the top 11 of the washing device 10, and the flue gas inlet 102 is disposed on the side wall 13 of the washing device 10. In particular implementations, the washing chamber 101 may be a cylindrical cavity or a prismatic cavity. It should be noted that the present application does not limit the specific embodiment of the washing chamber 101 in any way.

Further, the top 11, the side wall 13, and the bottom 12 are arranged in this order as viewed in the vertical direction.

Furthermore, in order to facilitate the collection of the washing liquid and the discharge of the flue gas, the inner diameter of the top portion 11 is gradually reduced and the inner diameter of the bottom portion 12 is gradually increased in the vertical direction from the top portion 11 to the bottom portion 12. The top portion 11 and the bottom portion 12 communicate with the side wall 13 through large-diameter ends, respectively.

In some embodiments, in order to discharge the washing liquid in the washing chamber 101, the washing apparatus 10 is provided with at least one liquid outlet communicating with the washing chamber 101, and the washing liquid in the washing chamber 101 is discharged out of the washing chamber 101 through the liquid outlet. It is understood that the drain port is one or more. In a specific implementation, the drain port is opened in the bottom 12 or the side wall 13.

In the present embodiment, the top portion 11 and the bottom portion 12 are both funnel-shaped. The top 11 is communicated with the side wall 13 through a large-diameter end, and the small-diameter end of the top 11 is configured as the smoke outlet 103; the bottom portion 12 communicates with the side wall 13 through a large diameter end, and the small diameter end of the bottom portion 12 is configured as one of the liquid discharge ports. The small diameter end of the bottom portion 12 is configured as a first drain 104. At this time, the first liquid discharge port 104 is disposed opposite to the smoke outlet 103 as viewed in the vertical direction.

In some embodiments, the extension pipe section 22 extends substantially parallel to the extension direction of the washing chamber 101, so that the washing chamber 101 and the flue gas input line 20 form a U-shaped flue gas flow path.

In specific implementation, an air inlet of the flue gas input pipeline 20 is configured at one end of the extending pipe section 22 away from the bent pipe section 21, and an air outlet of the flue gas input pipeline 20 is configured at one end of the bent pipe section 21 away from the extending pipe section 22. In specific implementation, the gas inlet of the flue gas input pipeline 20 is used for communicating with the gas outlet of the ship engine, and the gas outlet of the flue gas input pipeline 20 is communicated with the flue gas inlet 102.

In this embodiment, the extension pipe section 22 extends in a vertical direction. At this time, the flow direction of the flue gas in the flue gas input pipeline 20 is vertical downward. The flow direction of the flue gas in the washing chamber 101 is vertical upward, and the flow direction of the flue gas in the flue gas input pipeline 20 is vertical downward.

In some embodiments, the extension pipe section 22 is provided with a cooling liquid inlet 201 and a ventilation opening 202 in sequence along the flow direction of the flue gas. The cooling liquid inlet 201 is used for inputting cooling liquid into the flue gas input pipeline 20 to cool the flue gas.

When flue gas (also called tail gas or waste gas) is desulfurized, the flue gas firstly enters the flue gas input pipeline 20 through the gas inlet of the flue gas input pipeline 20, at the moment, the cooling liquid entering from the cooling liquid inlet 201 can be sprayed into the flue gas input pipeline 20 to play a role of cooling the flue gas, the temperature of the flue gas is reduced to be below 60 ℃, and the cooling liquid can flow into the washing cavity 101 through the bent pipe section 21 and is discharged from the liquid outlet; the flue gas continues to flow downwards and enters the interior of the washing chamber 101 through the bent pipe section 21.

In practical implementation, since the extension pipe section 22 cools the flue gas entering the flue gas input pipeline 20 to below 60 ℃, the bent pipe section 21 can be made of more inexpensive super duplex stainless steel without using super austenitic stainless steel, and anti-scald heat preservation measures are not required from the beginning of the bent pipe section 21. Thus, the manufacturing cost of the flue gas washing system 100 can be reduced.

In some embodiments, the spraying assemblies 30 are provided in multiple groups, multiple groups of the spraying assemblies 30 are arranged in the washing chamber 101 at intervals along the flow direction of the flue gas, and multiple groups of the spraying assemblies 30 are located between the flue gas inlet 102 and the flue gas outlet 103. When the device is used specifically, the cleaning solution sprayed by the spraying component 30 and the flue gas flowing through the spraying component 30 act together to form a liquid film (namely a spraying layer), and the flue gas and the liquid film (namely the spraying layer) are in contact reaction to achieve the purpose of cleaning.

More specifically, a plurality of groups of the spraying assemblies 30 are arranged in the washing chamber 101 at intervals along the vertical direction, so that the flue gas flowing into the washing chamber 101 through the flue gas inlet 102 and washed by the plurality of groups of the spraying assemblies 30 flows out through the flue gas outlet 103.

Further, along the circumferential direction of the washing chamber 101, a plurality of groups of the shower assemblies 30 are arranged in a staggered manner. So set up, ensure that the flue gas is fully washed.

Further, the same or different cleaning solutions are used in the plurality of sets of spraying assemblies 30, which is not limited in any way in this application. Preferably, the spray assembly 30 employs Mg (OH) ₂ The solution was used as a washing solution.

In some embodiments, a water diversion assembly 40 is disposed in the washing chamber 101, and the water diversion assembly 40 is located between the flue gas inlet 102 and the flue gas outlet 103 along the flow direction of the flue gas. At this time, the plurality of sets of spray assemblies 30 include a first spray assembly 31 and a second spray assembly 32; along the flowing direction of the flue gas, the first spray assembly 31 is positioned between the water diversion assembly 40 and the flue gas inlet 102, and the second spray assembly 32 is positioned between the water diversion assembly 40 and the flue gas outlet 103.

At this time, the washing chamber 101 is divided into a preliminary washing section and a fine washing section. The preliminary washing stage is located between the water diversion assembly 40 and the flue gas inlet 102, and the fine washing stage is located between the water diversion assembly 40 and the flue gas outlet 103. In this embodiment, a set of the first spraying assemblies 31 is disposed in the preliminary washing section, and four sets of the second spraying assemblies 32 are disposed in the fine washing section.

In the embodiment of the present application, a plurality of sets of the spraying assemblies 30 are disposed at intervals along the extending direction of the side wall 13 and fixedly mounted on the inner surface of the side wall 13.

Specifically, the whole of water diversion component 40 is hopper-shaped or trumpet-shaped, the major diameter end orientation of water diversion component 40 first drain port 104 sets up and fixes on the internal surface of lateral wall 13, the tip configuration of water diversion component 40 sets up towards exhanst gas outlet 103. In practical implementation, the large-diameter end of the water diversion assembly 40 is located below the second liquid discharge port 105. In specific implementation, the cleaning solution sprayed by the second spraying component 32 is ensured to fall on the water diversion component 40 after the cleaning reaction is completed, and then is discharged through the second liquid outlet 105.

In some embodiments, a water-retaining assembly 50 is disposed in the washing chamber 101, and the water-retaining assembly 50 is disposed downstream of the water-dividing assembly 40 and upstream of the flue gas outlet 103 along the flow direction of the flue gas.

The flue gas is passing through during water retaining component 50, can receive water retaining component 50's reposition of redundant personnel and strike, water retaining component 50 can realize water conservancy diversion and the effect that flow equalizes with the direction guide of flue gas to the shower nozzle of second spray set 32, and then can make the contact reaction of flue gas and the washing liquid that second spray set 32 sprayed more abundant, improve desulfurization effect.

Further in conjunction with the second spray assembly 32 embodiment, it is understood that the plurality of second spray assemblies 32 have the lowest second spray assembly 32 closest to the water distribution assembly 40 (i.e., the lowest second spray assembly 32 of the fine wash stage). In specific implementation, the water retaining assembly 50 and the second spraying assembly 32 at the bottommost layer of the fine washing section are located at the same height, so that the arrangement requirements of the washing cavity 101 on the height can be greatly reduced, and the cost is saved.

Furthermore, be equipped with a plurality of spray assembly access holes on washing device 10, it is a plurality of spray assembly access hole all communicates the washing chamber, wherein partly spray assembly access hole follows the flue gas flow direction divide water assembly upper reaches, another part spray assembly access hole follows the flue gas flow direction divide water assembly low reaches. More specifically, the washing apparatus 10 is provided with two of the spray assembly access openings, namely a first spray assembly access opening 106 and a second spray assembly access opening 107. First spray assembly access hole 106 is followed the flue gas flow direction is located divide water assembly 40 upstream, can supply to overhaul first spray assembly 31, second spray assembly access hole 107 is followed the flue gas flow direction is located divide water assembly 40 downstream, can supply to overhaul second spray assembly 32.

In some embodiments, the washing apparatus 10 is provided with a first drain 104 and a second drain 105 communicating with the washing chamber 101. The first liquid outlet 104 is formed in the bottom 12 of the washing device 10 and communicated with the washing chamber 101, and the washing liquid sprayed by the first spraying component 31 is discharged from the washing chamber 101 through the first liquid outlet 104 after the washing of the flue gas is completed; the second liquid outlet 105 is opened on the side wall 13 of the washing device 10 and communicated with the washing chamber 101, and the washing liquid sprayed by the second spraying assembly 32 is discharged from the washing chamber 101 through the second liquid outlet 105 after the washing of the flue gas is completed.

In a specific implementation, the washing apparatus 10 is provided with a plurality of second liquid discharge ports 105, and the plurality of second liquid discharge ports 105 are arranged at intervals along the circumferential direction of the washing chamber 101.

In some embodiments, a plurality of level alarms 80 are disposed in the washing chamber 101, and a plurality of level alarms 80 are disposed between the first drain outlet and the flue gas inlet 102. Through setting up liquid level alarm 80 can implement the detection the liquid level height of washing chamber 101 prevents the too high or the condition of crossing low of liquid level of washing chamber 101 takes place, and then can prevent that the washing liquid from can flow back extremely because the liquid level is too high the condition in the flue gas input pipeline 20 takes place, can also prevent the external gas via first drain port 104 gets into washing chamber 101.

In particular to the present embodiment, the level alarms 80 include a first level alarm 81 and a second level alarm 82. Wherein the first level alarm 81 is closer to the first drain 104 than the second level alarm 82. In this case, the first level alarm 81 is a low level alarm, and the second level alarm 82 is a high level alarm.

In some embodiments, at least one mist eliminator 60 is disposed within the washing chamber 101, the mist eliminator 60 being located between the spray assembly 30 and the flue gas outlet 103 in the direction of flue gas flow. Through setting up defroster 60 can get rid of the steam in the flue gas, promote flue gas washing effect.

In some embodiments, the washing apparatus 10 also has a demister access opening 108 in communication with the washing chamber 101, the demister access opening 108 being used to access the demister 60.

Specifically, the demister access opening 108 is located between the demister 60 and the flue gas outlet 103 in the flue gas flow direction. Also, the demister access opening 108 can expose the demister 60.

In some embodiments, at least one flushing assembly 70 is disposed in the washing chamber 101, and the flushing assembly 70 is located on a side of the demister 60 adjacent to the air outlet for spraying a flushing liquid to the demister 60 to flush the demister 60. With this arrangement, the operation effect and the operation performance of the demister 60 can be improved.

Based on the above embodiment of the washing apparatus 10, the demister 60 is installed at one end of the side wall 13 near the top 11 (i.e. the top end of the side wall 13), and the demister access opening 108 is opened on the top 11 and located at the periphery of the flue gas outlet 103. The flushing assembly 70 is disposed at an end of the top portion 11 facing the side wall 13 (i.e., a large diameter end of the top portion 11).

In a specific implementation, the demister 60, the flushing assembly 70 and the demister access opening 108 are arranged in sequence along the flow direction of the flue gas. Also, the nozzles of the flushing assembly 70 are disposed toward the demister 60.

The specific working process of the flue gas scrubbing system 100 of the present application: after entering the washing cavity 101 through the flue gas input pipeline 20, the flue gas flows upward at a high speed, the flue gas firstly passes through the first spraying component 31 of the preliminary washing section, the flue gas and the washing liquid sprayed by the first spraying component 31 act together to form a liquid film (spraying layer), and the flue gas and the washing liquid are in contact reaction to complete preliminary washing; then, the cleaning solution sprayed by the first spraying component 31 is discharged from the first liquid discharge port 104 after reacting, the flue gas flows to the fine washing section through the water distribution component 40 and then rushes to the water retaining component 50, the flue gas flows upwards from the periphery of the water retaining component 50 through the flow guiding and flow equalizing effects of the water retaining component 50, when the flue gas passes through the fine washing section, the flue gas and the cleaning solution sprayed by the second spraying component 32 jointly act to form a multi-layer liquid film (spraying layer), and the flue gas and the cleaning solution in the liquid film are in full contact reaction to complete fine washing; the cleaning liquid sprayed by the second spraying assembly 32 of the fine cleaning section passes through the water diversion assembly 40 and then is discharged from the second liquid outlet 105, and then the flue gas passes through the demister 60, so that small liquid drops suspended in the flue gas are filtered out and discharged to the air through the flue gas outlet 103.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims. In addition, the principle and the implementation manner of the present application are explained by applying specific examples in the specification, the above description of the embodiments is only for helping understanding the method and the core idea of the present application, and the content of the present application should not be construed as limiting the present application.

Claims

1. A flue gas scrubbing system, comprising:

the flue gas input pipeline comprises a bent pipe section and an extending pipe section which are adjacent, the bent pipe section is communicated with the gas inlet, and the flue gas input pipeline is used for inputting flue gas to the washing cavity; and the number of the first and second groups,

2. The flue gas scrubbing system according to claim 1, wherein said scrubbing means has a top, a bottom and sidewalls for enclosing said scrubbing chamber, said sidewalls being connected to said top and said bottom;

3. The flue gas scrubbing system according to claim 1, wherein said extension duct section extends in a direction generally parallel to the direction of flue gas flow within said scrubbing chamber such that said scrubbing chamber and said flue gas input line form a U-shaped flue gas flow path.

4. The flue gas scrubbing system according to claim 1, wherein said extension duct section is provided with a coolant inlet and a vent;

5. The flue gas scrubbing system according to claim 1, wherein said spray assemblies are in a plurality of groups, said groups of spray assemblies being spaced apart along said flue gas flow direction.

6. The flue gas scrubbing system according to claim 1, wherein said scrubbing means is provided with at least one drain opening communicating with said scrubbing chamber, and wherein scrubbing liquid in said scrubbing chamber flows out of said scrubbing chamber through said drain opening.

7. The flue gas scrubbing system according to any one of claims 1 to 6, wherein said scrubbing chamber is provided with a water diversion assembly located between said flue gas inlet and said flue gas outlet in a flue gas flow direction;

8. The flue gas washing system of claim 7, wherein the washing device is provided with a plurality of spray assembly access openings, the plurality of spray assembly access openings are all communicated with the washing chamber, one part of the spray assembly access openings are arranged on the upstream of the water diversion assembly along the flow direction of the flue gas, and the other part of the spray assembly access openings are arranged on the downstream of the water diversion assembly along the flow direction of the flue gas.

9. The flue gas scrubbing system according to claim 7, wherein said scrubbing chamber is provided with a water deflector assembly disposed downstream of said water diversion assembly and upstream of said flue gas outlet in the direction of flow of said flue gas.

10. The flue gas scrubbing system according to claim 7, wherein said scrubbing means is provided with a first drain port and a second drain port communicating with said scrubbing chamber, wherein:

the second liquid outlet is formed in the side wall of the washing device and communicated with the washing cavity, and the washing liquid sprayed by the second spraying assembly is discharged out of the washing cavity through the second liquid outlet.

11. The flue gas scrubbing system according to claim 7, wherein said scrubbing chamber is provided with a plurality of level alarms.

12. The flue gas scrubbing system according to claim 1, wherein said scrubbing chamber is provided with at least one mist eliminator positioned in the direction of flue gas flow between said spray assembly and said flue gas outlet.

13. The flue gas scrubbing system according to claim 12, wherein said scrubbing device further has a demister access opening in communication with said scrubbing chamber, said demister access opening being located between said demister and said flue gas outlet in the direction of flow of said flue gas.

14. The flue gas scrubbing system according to claim 12, wherein said scrubbing chamber is provided with at least one flushing assembly, said flushing assembly being located on a side of said mist eliminator adjacent said flue gas outlet for flushing said mist eliminator.