CN104307334A - Flue gas cleaning device - Google Patents

Abstract

The invention discloses a flue gas purification device. A first processing chamber, a second processing chamber and at least one intermediate processing chamber are arranged in a box body. Corresponding liquid pools are arranged at the bottom of each processing chamber, and each processing chamber is equipped with Air duct; the first treatment room is a water mist spray dust removal room, and the first spray device is installed in the air duct; a gas-liquid separation room is arranged above the second treatment room, and a set of The circular holes communicate with the cylinder above each circular hole; the cylinder is provided with a second spray device; the gas outlet of the gas-liquid separation chamber is provided with a condensing device, an activated carbon adsorption chamber and a purified gas outlet in sequence. The invention has the advantages of compact structure, high purification efficiency, good dust removal effect and strong adaptability, and can be used in various industries such as chemical industry, light industry, rubber, machinery, ship, automobile and petroleum.

Description

A flue gas purification device

technical field

The invention relates to the field of flue gas purifiers, in particular to a device for treating toxic and harmful flue gas generated during the preparation and operation of biodiesel, oil refining, smelting, rubber production, incinerators, and industrial boilers. It is suitable for chemical, light Industrial, rubber, machinery, shipbuilding, automobile, petroleum and other industries.

Background technique

With the continuous development of modern industry, more and more attention is paid to the control of industrial pollution. Common industrial pollution includes waste gas, waste water and waste residue. Such as combustion in industrial boilers, SO ₂ and other harmful substances produced during the combustion process, if they are discharged into the atmosphere without strict and effective desulfurization, they will irritate the human respiratory tract, and will be inhaled into the blood. Toxic and side effects, serious can also induce cancer. According to statistics, the total amount of SO ₂ discharged into the atmosphere in China in 2011 was 11.141 million tons, 80% of which came from combustion.

In recent years, China has implemented a series of measures to strictly require the SO ₂ content in flue gas emissions. Since January 1, 2010, the state has stipulated that the SO ₂ emission standard is 400 mg/m ³ , and a relatively high concentration of SO 2 is produced during the production process. Enterprises with SO ₂ flue gas cannot meet this standard if they do not have strict and effective desulfurization measures.

For this reason, people usually use a desulfurization tower to desulfurize the SO ₂ in the flue gas. Referring to Figure 1, an existing desulfurization tower, such as Chinese patent 2012203796103, includes a waste liquid outlet 1', a gas equalization chamber 4', a flue gas purification chamber 7', and a gas-water separation chamber 10 connected sequentially from bottom to top. 'and the exhaust port 13', the air inlet pipe 3' is provided on one side of the air equalization chamber 4', and the upper end of the equal air chamber 4' is a tapered diameter-reducing section 5'; the flue gas purification chamber 7 A desulfurization purifier 6' is provided inside, and a liquid spray pipe 21' is provided on one side of the flue gas purification chamber 7', and the liquid spray port of the liquid spray pipe 21' is located above the desulfurization purifier 6', so The surface of the flue gas purification chamber 7' is also provided with a viewing window 20'; the gas-water separation chamber 10' includes a tapered diameter-expanding section 8' at the bottom, a chamber body 19', and a tapered diameter-reducing section 12' on the upper part. A deflector 9' is provided at the center of the bottom of the chamber body 19', and a gas-water separator 11' is provided at the upper part of the chamber body 19'.

Under the action of the induced draft fan, the dust-cleaned flue gas enters the gas equalization chamber 4' from the air inlet pipe 3' of the desulfurization tower in the horizontal direction. Since the axial direction of the air inlet pipe 3' and the gas equalization chamber 4' is at an angle close to 90 degrees , the flue gas decelerates after being resisted during the turning process, which prolongs the pre-spraying and cooling time of the flue gas. After the flue gas gradually fills the equalizing chamber 4' and rises; The speed is increased, and then enters the flue gas purification chamber 7'; in the flue gas purification chamber 7', the absorbent circulating liquid is sprayed out from the liquid spray pipe 21', and the circulating liquid naturally falls to the desulfurization purifier 6' due to gravity, and When the flue gas rises to the cyclone gas-liquid layer and the chopped absorbent circulating liquid The desulfurization reaction occurs after the encounter. Since the supporting force formed by the flue gas is constant, the liquid in the cyclone gas-liquid layer has been increasing. When the supporting force of the flue gas is balanced with the gravity of the cyclone gas-liquid layer, the earliest formed cyclone gas-liquid layer It will be replaced by the newly formed cyclone gas-liquid layer, and the trapped impurities will fall into the homogeneous chamber and be discharged out of the tower; the flue gas after the reaction will continue to rise with a certain amount of liquid droplets cut into extremely small particles, At this time, the gas-water mixture hits the deflector 9' at a faster speed and is blocked, and spreads out from around the deflector 9' evenly, and then continues to rise to the gas-water separator 11' and 11 "; Sulfur-free and relatively dry flue gas is obtained after the two-layer gas-water separator, and is discharged to the atmosphere from the exhaust port 13'; the waste liquid after reaction is discharged from the bottom waste liquid discharge port 1'.

Although the desulfurization tower with the above structure has effectively solved the _SO2 emission problem, it still has the following defects:

1. The tower structure is adopted, the flue gas flow is short, and the residence time is short. Most of the large-particle water droplets in the gas-liquid do not fall back to the flue gas purification chamber 7' due to impact, but directly enter the gas-water separation device 11'. However, the gas-water separator 11' processes the water in the water mist through condensation, that is, small water droplets, and the separation effect on large-particle water droplets is not obvious, and finally these large-particle water droplets are directly discharged to the atmosphere. Not only is it not conducive to environmental protection, but also reduces the recycling rate of desulfurization circulating fluid.

2. The treatment area is small, the resistance of the flue gas flow is large, and the gas output is small, so the efficiency is not high.

3. The processing object is single, and it can only process sulfur-containing gases, and cannot comprehensively process toxic and harmful gases such as methanol and dimethyl sulfide.

There is also an improved flue gas treatment device. On the basis of the desulfurization tower, an oxidation tower is installed side by side, or a plurality of corresponding processing towers are installed according to the needs, so as to achieve the purpose of comprehensive treatment. The device connects the top gas outlets and the bottom gas inlets of two adjacent towers through pipelines, and a special circulation pool is set at the same time to store the circulation liquid. Since each processing tower is independent and needs to be connected by external pipelines, there are many and long intermediate pipelines, and the number of ineffective pipelines through which the airflow flows increases, resulting in increased airflow resistance and reduced work efficiency. Simultaneously, this device is not compact, occupies a large area, and is very uneconomical.

Contents of the invention

The present invention aims to solve the problems of short flue gas flow, less residence time and single processing object in the prior art, and aims to provide a kind of flue gas with longer flue gas flow, more residence time, which can comprehensively treat various toxic A flue gas purification device for harmful gases.

The present invention also solves the problem that in the prior art, when the desulfurization tower is used in combination with multiple external processing towers, there are many and long intermediate pipelines, the invalid pipelines through which the airflow flows are long, the airflow resistance is large, the work efficiency is low, and the device assembly takes up The problem of large floor area is very uneconomical, and the purpose is to provide a flue gas purification device with compact structure, small air flow resistance, high working efficiency, and economical and practical.

In order to solve the above problems, the present invention adopts the following technical solutions: a flue gas purification device, including a box body, a first treatment chamber, a second treatment chamber and a side-by-side arrangement in the first treatment chamber and at least one intermediate processing chamber between the second processing chamber, the bottom of each processing chamber is provided with a corresponding liquid pool, which is characterized in that each of the processing chambers is equipped with an air duct, from the outside or the front-stage processing chamber The flue gas is introduced into the corresponding liquid pool in turn; the first treatment chamber is a water mist spray dust removal chamber, and a first spray device is arranged in the air duct; a gas-liquid separation chamber is arranged above the second treatment chamber , and through a group of circular holes opened on the transverse diaphragm therebetween and the cylinder above each circular hole communicated; the cylinder is provided with a second spray device; the outlet of the gas-liquid separation chamber The gas port is sequentially provided with a condensing device, an activated carbon adsorption chamber and a purified gas outlet.

In the flue gas purification device of the present invention, the industrial waste gas enters the water mist spray dust removal chamber from the air pipe, and the gas-liquid mixing and absorption reaction allows the water-soluble pollutants such as methanol and most of the particles to be removed here; through the first stage The waste gas from the water mist spray dedusting room enters the intermediate treatment room and the second treatment room in turn, and the corresponding toxic and harmful substances are removed according to the design requirements; the waste gas treated in the second treatment room is further sprayed from the top cylinder , remove the remaining large water vapor particles in the gas, and enter the gas-liquid separation chamber; after the gas-liquid separation in the gas-liquid separation chamber, the gas enters the activated carbon adsorption chamber, and a small amount of untreated organic waste gas is adsorbed and removed by the high-efficiency carbon fiber adsorber. Finally, the tail gas purified up to the standard is discharged from the purified gas outlet.

The liquid sprayed by the second spraying device is the same as the solution in the liquid pool of the second treatment chamber, and falls back into the liquid pool after being sprayed, and can be drawn from the liquid pool by the liquid pump and circulation pipeline for recycling.

The flue gas purification device of the present invention has the following advantages:

1. When the industrial waste gas enters the spray chamber of the water mist chamber from the air pipe, the treated gas containing soot and black substances and the water vapor in the atomized state sprayed by the spray device are completely adhered and cleaned. Since the spraying is carried out in the pipe, there will not be a large amount of water vapor directly entering the lower processing space. Moreover, the air duct is directly introduced into the liquid pool, and the dust particles are fully washed and separated in the liquid pool, which greatly improves the dust removal effect.

2. The air pipes in the intermediate processing chamber and the second processing chamber are also directly introduced into the liquid pool from the upper level. Therefore, the waste gas treated from the previous stage directly enters the liquid pool to react with the corresponding solution, and the reaction is very sufficient.

3. The present invention adopts a box-type structure, and integrates each processing chamber into a box body. There is no invalid pipeline between adjacent two-stage processing chambers, the airflow resistance is small, and the processing efficiency is very high.

4. Generally, the flue gas after multi-stage treatment still contains water vapor of different diameters, and the gas-liquid separation chamber can only condense and separate the water vapor particles with smaller diameters, and most of the water vapor with larger diameters will be directly Exhaust to atmosphere. The result is: on the one hand, the water vapor usually carries toxic and harmful substances, which will cause damage to the environment; on the other hand, the water in the water vapor cannot be reused, which is neither economical nor environmentally friendly. The present invention adopts a group of cylindrical spraying devices at the outlet of the second processing chamber, so that the flue gas does not directly enter the gas-liquid separation chamber, but is collected in a group of cylinders for another spraying to remove the flue gas. The larger diameter of water vapor, so that the final gas discharged to the atmosphere is drier and cleaner.

5. The intermediate processing chamber and the second processing chamber of the present invention can be equipped with corresponding solutions according to the source of the flue gas to be purified and the composition of toxic and harmful gases, and the number of intermediate processing chambers can also be set according to needs. For example, the intermediate treatment room is a lye treatment room, which can remove sulfur dioxide and other acidic organic waste gases; the second treatment room is an oxidation treatment room, and the liquid pool uses a certain concentration of sodium hypochlorite solution, which can remove organic waste gases such as methyl sulfide. For another example, there are two intermediate treatment chambers, which are lye treatment chamber and oxidation treatment chamber in turn, and the second treatment chamber is a denitrification treatment chamber. The liquid pool adopts a certain concentration of reducing agent, or adds a certain amount of catalyst as required. It can be seen that the present invention has strong flexibility and adaptability, can meet various types of exhaust gas treatment requirements, and can be widely used in various industries such as chemical industry, light industry, rubber, machinery, ships, automobiles, and petroleum.

6. The present invention adopts active carbon adsorption. Adsorption, as an industrial separation process, has been widely used in chemical industry, petroleum, food, light industry and the preparation of high-purity gas and other industrial sectors. Due to the high selectivity and high separation effect of adsorption, and the ability to remove trace substances, the adsorption purification method has received increasing attention in air pollution control, especially for the removal of low-concentration harmful substances that are difficult to separate by other methods and the treatment of emissions. Exhaust gas with strict standard requirements is better.

Utilizing the microporous adsorption characteristics of activated carbon to adsorb organic waste gas is a commonly used and most effective industrial treatment method. The adsorption can make the purification efficiency of organic waste gas as high as 90-95%. The activated carbon adsorber has simple equipment and low investment. When exhaust gas is sucked through the adsorber, it can absorb benzene, toluene, xylene, alcohol, ketone, ester, Waste gas adsorption and recovery of organic solvents such as gasoline. It is more suitable for waste gas treatment with large air volume, suitable for chemical industry, light industry, rubber, machinery, shipbuilding, automobile, petroleum and other industries, so that organic solvent vapor and volatile substances can be adsorbed on the surface to achieve the purpose of clean air.

According to the present invention, each of the air ducts can introduce waste gas from the top or the side wall. In a preferred manner, the air inlet of at least one air duct is arranged on the side wall of the corresponding processing chamber. This structure can reduce the length of ineffective pipelines and is beneficial to improve purification efficiency.

According to the present invention, the air ducts can adopt any existing forms and structures. In a preferred manner, at least one air duct further includes a section of standpipe, and a windshield is provided at the bottom of the standpipe. Due to its flaring, the windshield can be used to reduce the air pressure and reduce the impact of the smoke on the liquid surface.

As a further improvement of the present invention, the bottom of the windshield is provided with serrated edges. The serrated edge can guide the smoke to diffuse into the liquid pool from the surroundings, which can further reduce the impact of the smoke on the liquid surface.

As a further improvement of the present invention, a drainage cover is also provided inside the wind cover. The hood guides the flue gas to the periphery of the hood for diversion and pressure reduction.

As a further improvement of the present invention, spraying devices are also provided in the air ducts of the second processing chamber and the intermediate processing chamber.

As a further improvement of the present invention, at least one air duct is provided with a filter screen at the air inlet.

According to the present invention, the condensing device may adopt a condensing plate, and the condensing plate may be a “Z”-shaped plate or a “T”-shaped plate, or other existing standard structures.

The condensing device can also use multi-faceted core balls for gas-liquid separation. Due to the large specific surface area, the multi-faced core ball can fully solve the gas-liquid exchange, so it has small resistance, large operating elasticity, light weight, high strength, free space, high temperature resistance (<120 degrees), corrosion resistance, good surface hydrophilicity, and wind resistance Small size, low power consumption and so on.

The present invention also provides a flue gas purification device with another structure, which includes a box body, and a lower treatment chamber and an upper treatment chamber are arranged in the box, and it is characterized in that the lower treatment chamber includes a first treatment chamber, The second processing chamber and at least one intermediate processing chamber arranged side by side between the first processing chamber and the second processing chamber, the bottom of each processing chamber is provided with a corresponding liquid pool, and each processing chamber is provided with There is an air duct, which sequentially introduces the flue gas into the corresponding liquid pool from the outside or the pre-treatment room; the first treatment room is a water mist spray dust removal room, and the first spray device is arranged in the air duct; The second treatment chamber is communicated with the inlet end of the upper treatment chamber through a group of circular holes and the cylinder above the circular holes provided on its top transverse partition; the second spraying chamber is provided in the cylinder device; the upper treatment chamber is provided with a third spray device, and a set of upper guide vanes and/or a set of lower guide vanes, and the upper and lower guide vanes are arranged alternately to form a wave-shaped channel; The gas outlet of the upper treatment chamber is sequentially connected to the gas-liquid separation chamber, the activated carbon adsorption chamber and the outlet of the purified gas.

The flue gas purification device with the above structure is based on the first technical solution, and an upper treatment chamber is added to further improve the purification effect. The wave-shaped channels in the upper treatment chamber alternately arranged with upper and lower deflectors can prolong the flow of flue gas, so that the flue gas can be fully treated.

The third spraying device may be a water mist spraying device, or the type of solution may be set according to design requirements.

It can be understood that an intermediate processing chamber can also be added between the lower processing chamber and the upper processing chamber as required.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural schematic diagram of an existing desulfurization tower.

Fig. 2 is a schematic structural view of the first embodiment of the flue gas purification device of the present invention.

FIG. 3 is a top view of FIG. 2 .

Fig. 4 is a sectional view taken along line A-A of Fig. 2 .

Fig. 5 is a sectional view taken along line B-B of Fig. 2 .

Fig. 6 is a sectional view taken along line C-C of Fig. 2 .

Fig. 7 is a sectional view taken along line D-D of Fig. 2 .

Fig. 8 is a schematic diagram of the flue gas flow in the present invention.

Fig. 9 is a schematic structural view of the second processing chamber and the gas-liquid separation chamber of the present invention.

Fig. 10 is a structural schematic diagram of the diaphragm between the second processing chamber and the gas-liquid separation chamber of the present invention.

Fig. 11 is a schematic structural view of another embodiment of the first processing chamber.

Fig. 12 is a schematic structural view of the drainage cover.

Fig. 13 is a schematic structural view of another embodiment of the intermediate processing chamber.

Fig. 14 is a schematic structural view of another embodiment of the second processing chamber.

Fig. 15 is a schematic structural view of the second embodiment of the flue gas purification device of the present invention.

Fig. 16 is a schematic structural view of the third embodiment of the flue gas purification device of the present invention.

Detailed ways

Referring to Fig. 1, the defects of an existing desulfurization tower have been described above and will not be repeated here.

Referring to Fig. 2, Fig. 3 and Fig. 7, a kind of flue gas purifying device of the present invention comprises box body 17, and described box body 17 is provided with the first processing chamber 1, the intermediate processing chamber 2 and the second processing chamber successively side by side. Chamber 3, corresponding liquid pools 24, 25, 26 are provided at the bottom of each processing chamber 1, 2, 3.

Referring to FIG. 4 , the first treatment chamber 1 is a water mist spray dedusting chamber with an air duct 5 inside. The air duct 5 is provided with a first shower device 21 . The air inlet of the air duct 5 is arranged on the upper side wall of the first processing chamber 1, and a filter screen 45 is also arranged at the air inlet. The air duct 5 also includes a section of standpipe 18 , the bottom of the standpipe 18 is provided with a windshield 8 , and the bottoms of the windshields 8 , 9 , 10 are provided with serrated edges 30 . The windshield 8 is immersed in the liquid pool 24 . The height of the serrated edge 30 is about 8-15 cm, and the liquid level 27 is about 8-15 cm higher than the tooth root. The water in the liquid pool 24 can be introduced into the first spraying device 21 through a water pump and a circulation pipeline for recycling.

Referring to FIG. 5 , the intermediate treatment chamber 2 is a desulfurization chamber with an air duct 6 inside. The air inlet of the air duct 6 is arranged on the upper side wall between the intermediate processing chamber 2 and the first processing chamber 1, and a filter screen 46 is also provided at the air inlet. The air duct 6 also includes a section of standpipe 19 , the bottom of the standpipe 19 is provided with a windshield 9 , and the bottom of the windshield 9 is provided with a serrated edge 31 . The windshield 9 is immersed in the liquid pool 25 . The height of the serrated edge 31 is about 8-15 cm, and the liquid level 28 is about 8-15 cm higher than the tooth root. Be lye in the liquid pond 25.

Referring to FIG. 6 , the second treatment chamber 3 is a denitration chamber with an air duct 7 inside. The air inlet of the air duct 7 is arranged on the upper side wall between the intermediate processing chamber 2 and the second processing chamber 3, and a filter screen 47 is also provided at the air inlet. The air duct 7 also includes a section of standpipe 20 , the bottom of the standpipe 20 is provided with a windshield 10 , and the bottom of the windshield 10 is provided with a serrated edge 32 . Windshield 10 is immersed in liquid pool 26 . The height of the serrated edge 32 is about 8-15 cm, and the liquid level 29 is about 8-15 cm higher than the tooth root. The reducing agent solution is contained in the liquid pool 26 .

9 and 10, the second treatment chamber 3 is provided with a gas-liquid separation chamber 4 above, and through a group of round holes 42 on the transverse partition 41 and the circle above each round hole 42. The barrel 44 communicates; the second spray device 36 is arranged inside the barrel 44 . The second spraying device 36 can spray from the top of the cylinder 44 , can also spray from the middle of the cylinder 44 , or can spray from the top and the middle of the cylinder 44 at the same time. The nozzles of the second spraying device 36 can be arranged at the center of the cylinder 44 or at the inner circumference of the cylinder 44 .

The liquid sprayed by the second spraying device 36 is the same as the solution in the liquid pool 24 of the second treatment chamber. Recycle after extraction.

Referring to FIG. 1 , the outlet of the gas-liquid separation chamber 4 is provided with a condensation device 11 , an activated carbon adsorption chamber 12 and a purified gas outlet 14 in sequence. In this embodiment, the condensing device is composed of multiple layers of “Z”-shaped condensing plates 11 .

Referring to Fig. 8, the working principle of the flue gas purification device of the present invention is as follows:

1. Industrial exhaust gas enters the first treatment chamber 1 from the air inlet of the air duct 5, and is initially filtered at the filter screen 45; in the standpipe 18, the flue gas is washed by the water mist sprayed by the first spray device 21, and then Enter the liquid pool 24; in the liquid pool 24, the gas-liquid mixing and absorption reaction allows the water-soluble pollutants such as methanol and most of the particles to be removed here; the flue gas after dust removal is treated from the outside of the air duct Space travels upwards.

2. The flue gas enters the intermediate treatment chamber 2 from the air inlet of the air duct 6, and is initially filtered at the filter screen 46; the flue gas enters the liquid pool 25 through the standpipe 19 and the wind cover 9; in the liquid pool 25, the The sulfur oxide reacts chemically with the lye; the desulfurized flue gas continues upward from the treatment space outside the air duct 6 .

3. The flue gas enters the second treatment chamber 3 from the air inlet of the air duct 7, and is initially filtered at the filter screen 47; the flue gas enters the liquid pool 26 through the standpipe 20 and the wind cover 10; The nitrogen oxides in the system react chemically with the reducing agent solution; the flue gas after the primary denitrification treatment continues to move upward from the treatment space outside the air duct 7 .

4. The flue gas passes through a group of circular holes 42, and enters the gas-liquid separation chamber 4 through the cylinder 44; it is sprayed again by the second spray device 36 in the cylinder 44 to remove the larger diameter water vapor in the flue gas Particles enter the gas-liquid separation chamber.

5. After the flue gas undergoes gas-liquid separation in the gas-liquid separation chamber 4, the dry gas continues to enter the activated carbon adsorption chamber 11 upwards, and a small amount of untreated organic waste gas is adsorbed and removed by the high-efficiency carbon fiber adsorber 13, and finally the tail gas that meets the standard is purified Discharge from the purge gas outlet.

In actual use, a sedimentation tank is built at the bottom of the flue gas purification device of the present invention, and the tank is divided into three sub-sedimentation tanks. The liquid tanks 24, 25 and 26 of the three processing chambers of the present invention are respectively provided with an overflow pipe, and the three overflow pipes introduce the liquid exceeding the warning liquid level into the corresponding sub-sedimentation tanks.

Referring to FIG. 11 , the present invention is another embodiment of the first processing chamber. The difference from the embodiment shown in FIG. 4 lies in that a draft cover 37 is also provided inside the wind cover 8 . The draft hood 37 guides the flue gas to the periphery of the wind hood for diversion and pressure reduction, so that the high-pressure flue gas does not directly impact the liquid pool.

Referring to Fig. 12, the described drainage cover 37 is welded by four triangular iron plates to form a cone structure. The cone structure matches the structure of the windshield 8, so that the surrounding air passages are uniform.

Referring to Fig. 13, another embodiment of the intermediate processing chamber of the present invention. The difference from the embodiment shown in FIG. 5 is that a spray device 34 is provided in the air duct 6 , and a drainage cover 38 is also provided in the wind cover 9 . Also be the same solution as the lye liquid pool 25 in the spraying device 34 .

Lye can also be recycled. Commonly used lye includes lime water, limestone powder emulsion, calcium carbide mud or soda ash and other alkaline aqueous solutions. Different recycling processes can be set according to different types of lye, and different desulfurization by-products will be obtained. The lye after the circulation treatment enters the lye spraying device 34 for recycling through the liquid pump and the circulation pipe.

Referring to Fig. 14, another embodiment of the second processing chamber of the present invention. The difference from the embodiment shown in FIG. 6 is that a spray device 35 is provided in the air duct 7 , and a drainage cover 39 is also provided in the wind cover 10 . The same solution as the lye liquid pool 26 is also in the spraying device 35 .

Similarly, the reducing agent solution can also be recycled. The circulating reducing agent solution enters the reducing agent solution spraying device 35 through the liquid pump and the circulating pipe for recycling.

Referring to Fig. 15, the second embodiment of the flue gas purification device of the present invention. This embodiment is an improvement based on the embodiment in FIG. 1 . The difference from the embodiment in FIG. 1 is that two intermediate processing chambers 2 and 54 are arranged side by side in sequence between the first processing chamber 1 and the second processing chamber 2 . The internal structure of the intermediate processing chamber 54 is basically the same as that of the intermediate processing chamber 2 .

There is lye in the liquid pool 23 of the intermediate treatment chamber 2 for removing sulfur oxides in the flue gas. There is a certain concentration of sodium hypochlorite solution in the liquid pool 53 of the intermediate treatment chamber 54, which can oxidize and remove organic waste gases such as methyl sulfide in the flue gas. The air inlet of the air duct 55 is arranged on the side wall between the intermediate processing chambers 2 and 54, and a filter screen 58 is also arranged at the air inlet. The air duct 55 also includes a standpipe 56, and the bottom of the standpipe 55 is provided with a windshield 57.

The rest of the structure of this embodiment is the same as that of the embodiment shown in FIG. 1 .

Referring to Fig. 16, the third embodiment of the flue gas purification device of the present invention. This embodiment is an improvement based on the embodiment in FIG. 1 . On the basis of the embodiment shown in FIG. 1 , an upper processing chamber 50 is added. A third spraying device 59 , a set of upper baffles 49 and a set of lower baffles 51 are provided in the upper treatment chamber 50 . The upper and lower deflectors are arranged alternately to form a wave-shaped channel. The upper and lower deflectors are arranged obliquely along the airflow direction.

The inlet end of the upper processing chamber 50 communicates with the second processing chamber through a set of cylinders 44 , and the gas outlet end connects with the gas-liquid separation chamber 4 , the activated carbon adsorption chamber 12 and the purified gas outlet 14 in sequence.

The rest of the structure of this embodiment is the same as that of the embodiment shown in FIG. 1 .

It should be understood that: the above-mentioned embodiments are only descriptions of the present invention, rather than limitations of the present invention, and any inventions that do not exceed the spirit of the present invention fall within the protection scope of the present invention.

Claims (10)

1. A flue gas cleaning device, comprising a casing (17), the first processing chamber (1), the second processing chamber (3) and the first processing chamber (3) are arranged side by side in the first processing chamber (17) in the casing (17). At least one intermediate processing chamber (2) between the processing chamber (1) and the second processing chamber (3), the bottom of each processing chamber (1, 2, 3) is provided with a corresponding liquid pool (24, 25, 26), characterized in that each of the processing chambers (1, 2, 3) is provided with an air duct (5, 6, 7), and the flue gas is sequentially introduced into the corresponding liquid pool ( 24, 25, 26); the first treatment chamber (1) is a water mist spray dedusting chamber, and the first spray device (21) is arranged in its air duct (5); the second treatment A gas-liquid separation chamber (4) is provided above the chamber (3), and a group of round holes (42) and a cylinder (44) above each round hole (42) are passed through the diaphragm (41) in between. ) Unicom; the second spray device (36) is provided in the described cylinder (44); the outlet of the gas-liquid separation chamber (4) is successively provided with a condensation device (11), an activated carbon adsorption chamber (12 ) and purge gas outlet (14). 2. The flue gas purification device according to claim 1, characterized in that the air inlet of at least one air pipe (5, 6, 7) is arranged on the side wall of the corresponding processing chamber. 3. The flue gas purification device according to claim 1, characterized in that at least one air duct (5, 6, 7) also includes a section of standpipe (18, 19, 20), and said standpipe (18, 19, 20) The bottom is provided with windshield (8,9,10). 4. The flue gas purification device according to claim 3, characterized in that serrated edges (30, 31, 32) are provided at the bottom of the wind shield (8, 9, 10). 5. The flue gas purification device according to claim 3 or 4, characterized in that a draft cover (37, 38, 39) is also provided inside the wind cover (8, 9, 10). 6. The flue gas purification device according to claim 1, characterized in that spraying devices are also arranged in the air ducts of the second processing chamber (3) and the intermediate processing chamber (2). 7. The flue gas purification device according to claim 1, characterized in that at least one air duct (5, 6, 7) is provided with a filter screen (45, 46, 47) at the air inlet. 8. A flue gas purification device, comprising a casing (17), wherein a lower processing chamber and an upper processing chamber (50) are provided in the casing (17), and it is characterized in that the lower processing chamber includes a first A processing chamber (1), a second processing chamber (3) and at least one intermediate processing chamber (2) arranged side by side between the first processing chamber (1) and the second processing chamber (3), each Corresponding liquid pools (24, 25, 26) are provided at the bottom of the processing chambers (1, 2, 3), and air ducts (5, 6, 7) are provided in each of the processing chambers (1, 2, 3) , the flue gas is introduced into the corresponding liquid pools (24, 25, 26) sequentially from the outside or the pre-processing chamber; the first processing chamber (1) is a water mist spray dust removal chamber, and its air duct (5) The first spraying device (21) is arranged inside; a group of circular holes (42) and the upper part of the circular hole (42) of the second processing chamber (3) are provided through its top transverse partition (41). Cylinder (44) communicates with the inlet end of described upper treatment chamber (50); Described cylinder (44) is provided with second shower device (36); Described upper treatment chamber (50) A third spraying device (59), and a set of upper guide vanes (49) and/or a set of lower guide vanes (51) are arranged inside, and the upper and lower guide vanes are arranged alternately to form a wave-shaped channel; The gas outlet of the upper treatment chamber (50) is sequentially connected to the gas-liquid separation chamber (4), the activated carbon adsorption chamber (12) and the purified gas outlet (14). 9. A flue gas purification device according to claim 8, characterized in that the upper and lower guide vanes are arranged obliquely along the airflow direction. 10. A flue gas purification device as claimed in claim 8 or 9, characterized in that at least one air duct (5, 6, 7) also includes a section of standpipe (18, 19, 20), said standpipe ( 18, 19, 20) are provided with a windshield (8, 9, 10); the bottom of the windshield (8, 9, 10) is provided with a serrated edge (30, 31, 32); the windshield (8 , 9,10) is also provided with drainage cover (37,38,39).