Transverse wet-type exhaust gas purification device and wet-type exhaust gas purification method

Abstract

The invention discloses a transverse wet-type exhaust gas purification device and a wet-type exhaust gas purification method. The disclosed transverse wet-type exhaust gas purification device comprises a gas inlet, a gas outlet, and a scrubbing part disposed between the gas inlet and the gas outlet, where the scrubbing part comprises a nozzle and a scrubbing liquid supply tube but does not comprise any flow barrier such as a filler and a filter, and the scrubbing part is disposed between the nozzle and the scrubbing liquid supply tube. The nozzle is configured to spray a scrubbing solution, the scrubbing solution supply pipe is configured to supply the scrubbing solution to the nozzle, and the transverse wet exhaust gas purification device is configured to continuously flow exhaust gas through the gas inlet, the scrubbing part, and the gas outlet in a direction intersecting a gravity direction.

Description

Technical Field

[0001] Disclosed are a horizontal wet exhaust gas purification device and a wet exhaust gas purification method. More specifically, disclosed are a horizontal wet exhaust gas purification device and a wet exhaust gas purification method having high exhaust gas treatment efficiency, low operating pressure differential, and small volume. Background Art

[0002] When no filling material is added to the vertical wet scrubber, it mainly treats exhaust gas containing SOx with more particles. However, the nozzle particle size increases due to nozzle clogging, and a large amount of water needs to be sprayed to improve the treatment efficiency. At the same time, the height of the scrubber reactor must be increased.

[0003] The waste gas in the IT field contains acidic and alkaline substances, so a treatment efficiency of 98% or higher is required. As an existing method to improve the treatment efficiency of such waste gas (acidic gas or alkaline gas), filling material is filled into the scrubber, and alkaline washing liquid is sprayed on the filling material to treat the acidic gas, and acidic washing liquid is sprayed on the filling material to treat the alkaline gas, thereby improving the waste gas removal efficiency by increasing the gas-liquid contact area.

[0004] In order to ensure the treatment efficiency, the existing horizontal wet scrubber must be filled with a filling material, so a space corresponding to the volume of the filling material is required inside the scrubber, which leads to the problem that it is difficult to install the device on a limited land. As described above, in order to improve the treatment efficiency, the filling material causes a high initial pressure difference, and sludge containing microorganisms is formed over time, thereby causing the pressure difference to gradually increase, so there is a problem that the equipment operation needs to be interrupted regularly to perform washing work or replace the filling material.

[0005] Figure 1 1 is a diagram schematically showing a conventional vertical structure wet scrubber 10 equipped with a filling material 17 .

[0006] refer to Figure 1 The existing longitudinal structure wet scrubber 10 equipped with a filling material 17 includes a main body 11, a storage tank 12 for a washing liquid W, and an exhaust gas G in Inlet 14, clean gas G out An outlet 13 , a downwardly arranged washing liquid spray nozzle 15 , a washing liquid supply pipe 16 , and a filling material 17 .

[0007] Figure 2 1 is a diagram schematically showing a conventional lateral structure wet scrubber 20 equipped with a filling material 27 .

[0008] refer to Figure 2The existing longitudinal structure wet scrubber 20 equipped with a filling material 27 includes a main body 21, a storage tank 22 for a washing liquid W, and an exhaust gas G in Inlet 23, clean gas G out An outlet 24 , a downwardly arranged washing liquid spray nozzle 25 , a washing liquid supply pipe 26 , and a filling material 27 .

[0009] Figure 3 1 is a diagram schematically showing a conventional horizontal structure wet scrubber 30 equipped with a filter 37 .

[0010] refer to Figure 3 The existing horizontal structure wet scrubber 30 equipped with a filter 37 includes a main body 31, a storage tank 32 for the washing liquid W, and an exhaust gas G in Inlet 33, clean gas G out An outlet 34 , a washing liquid spray nozzle 35 , a washing liquid supply pipe 36 , and a filter 37 . Summary of the invention

[0011] Technical issues

[0012] One embodiment of the present invention provides a horizontal wet exhaust gas purification device, which has high exhaust gas treatment efficiency, low operating pressure differential, and small volume.

[0013] Another embodiment of the present invention provides a wet exhaust gas purification method, which has high exhaust gas treatment efficiency, low operating pressure differential, and can save land.

[0014] Technical Solution

[0015] In one aspect, the present invention provides a horizontal wet exhaust gas purification device, comprising:

[0016] Gas inlet;

[0017] Gas outlet; and

[0018] a scrubbing section arranged between the gas inlet and the gas outlet,

[0019] The washing part includes a nozzle and a washing liquid supply pipe, but does not include any flow obstacles such as filling materials and filters, the nozzle is configured to spray washing liquid, and the washing liquid supply pipe is configured to supply washing liquid to the nozzle.

[0020] The device is configured so that the exhaust gas continuously flows in a direction intersecting with the direction of gravity through the gas inlet, the scrubbing unit, and the gas outlet.

[0021] The transverse wet exhaust gas purification device may further include an expansion portion arranged between the gas inlet and the scrubbing portion.

[0022] The transverse wet exhaust gas purification device may further include a reduction portion arranged between the scrubbing portion and the gas outlet.

[0023] The reduction portion may include a demister.

[0024] The transverse wet exhaust gas purification device may further include a washing liquid storage tank configured to store washing liquid.

[0025] The washing unit may include a nozzle end including one or more nozzles configured to spray washing liquid toward the gas inlet side in a direction intersecting with the gravity direction.

[0026] The number of the nozzle ends may be 3 to 10.

[0027] The nozzle end may include 4 or more nozzles.

[0028] The spray angle of the nozzle may be 30 degrees to 170 degrees.

[0029] The inner diameter of the nozzle may be greater than or equal to 4 mm.

[0030] The nozzle end may include a plurality of nozzles, and a spacing between the nozzles may be less than or equal to 800 mm.

[0031] There may be a plurality of nozzle ends, and a distance between the nozzle ends may be greater than or equal to 150 mm.

[0032] Another aspect of the present invention provides a wet exhaust gas purification method, which comprises:

[0033] The exhaust gas is purified by the scrubbing liquid through the horizontal wet exhaust gas purification device.

[0034] The wet exhaust gas purification method may be performed under the conditions that the linear velocity of the exhaust gas is less than or equal to 4 m / s, and the pressure of the washing liquid sprayed through the nozzle is greater than or equal to 0.5 bar.

[0035] The wet exhaust gas purification method may be performed under the condition that the scrubbing liquid injection pressure is 1 bar to 2 bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 FIG. 1 is a diagram schematically showing a conventional vertical structure wet scrubber equipped with a filling material.

[0037] Figure 2 FIG. 1 is a diagram schematically showing a conventional lateral structure wet scrubber equipped with a filling material.

[0038] Figure 3 The figure schematically shows a conventional horizontal structure wet scrubber equipped with a filter.

[0039] Figure 4 FIG. 1 is a diagram schematically showing a transverse wet exhaust gas purification device according to an embodiment of the present invention.

[0040] Description of Reference Numerals

[0041] 100: Horizontal wet exhaust gas purification device 110: Gas inlet

[0042] 120: expansion part 130: washing part

[0043] 140: Reduction part 150: Gas outlet

[0044] 160: Washing liquid storage tank NG1~NG3: Nozzle end

[0045] N: Nozzle WG: Exhaust gas

[0046] W, WL: washing liquid CG: cleaning gas

[0047] L: length of washing section D: distance between nozzle ends

[0048] d: Nozzle spacing DETAILED DESCRIPTION

[0049] Hereinafter, a horizontal wet exhaust gas purification device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0050] In this specification, "waste gas" refers to gases containing acidic and alkaline pollutants (particles, NH3, BCl3, Cl2, HCl, HF, F2, HBr, SiCl4, TiCl4, SiF4, ClF3, etc.) discharged from various industrial processes such as semiconductor manufacturing processes, chemical processes, electronic product manufacturing processes, electronic component manufacturing processes, precision machinery manufacturing processes, and secondary battery manufacturing processes.

[0051] In addition, in this specification, "clean gas" refers to a gas containing a smaller amount of impurities than the exhaust gas due to impurities in the exhaust gas being removed.

[0052] In this specification, the “front end or front end portion” refers to a portion or end portion located in the opposite direction of the exhaust gas flow direction, and the “rear end or rear end portion” refers to a portion or end portion located in the normal direction of the exhaust gas flow direction.

[0053] Furthermore, in this specification, a "flow obstruction" refers to an object that obstructs the flow of exhaust gas.

[0054] In addition, in this specification, "laterally" means that the wet exhaust gas purification device is arranged so that the exhaust gas is purified while being guided to continuously flow in a direction intersecting the gravity direction.

[0055] Furthermore, in this specification, "scrubbing" means removing pollutants (including particulates) from the waste by contacting the waste gas with a scrubbing liquid.

[0056] Furthermore, in this specification, "other gas-liquid contact promoting members" are members that increase the contact area between the exhaust gas and the washing liquid, and refer to members other than the nozzle, the washing liquid supply pipe, and the washing unit body.

[0057] Furthermore, in this specification, the "cross-sectional area" refers to the cross-sectional area of ​​a plane (ie, a vertical plane) perpendicularly intersecting the exhaust gas flow direction (ie, a horizontal direction).

[0058] In addition, in this specification, "the spray angle of the nozzle" refers to the angle obtained by multiplying the diffusion angle of the conical water film (i.e., the angle between the height of the conical water film and the generatrix) by 2 when the cleaning liquid is sprayed from the nozzle to form a conical water film.

[0059] In addition, in this specification, "linear velocity" refers to the moving distance of the exhaust gas per second.

[0060] Figure 4 FIG. 1 is a diagram schematically showing a transverse wet exhaust gas purification device 100 according to an embodiment of the present invention.

[0061] refer to Figure 4 , a horizontal wet exhaust gas purification device 100 according to an embodiment of the present invention includes a gas inlet 110 , a scrubbing unit 130 , and a gas outlet 150 .

[0062] The gas inlet 110 is an introduction port for the waste gas WG.

[0063] The washing part 130 may include a nozzle N and a washing liquid supply pipe P.

[0064] The nozzle N may be configured to spray the washer liquid WL.

[0065] The washing liquid supply pipe P may be configured to supply washing liquid WL to the nozzle N. Specifically, the washing liquid supply pipe P may be configured to communicate with the washing liquid storage tank 160 at one end and communicate with the nozzle N at the other end, thereby supplying the washing liquid WL stored in the washing liquid storage tank 160 to the nozzle N. Figure 4 Although not shown in the figure, a pump (not shown) for supplying the washing liquid WL may be further arranged between the washing liquid storage tank 160 and the washing liquid supply pipe P.

[0066] In addition, the washing section 130 may not include any flow obstacles such as fillers and filters except the nozzle N and the washing liquid supply pipe P. As a result, the horizontal wet exhaust gas purification device 100 does not need a space corresponding to the volume of the filler or filter inside, so the overall volume is reduced and it is easy to be installed in a limited space, and since there is no flow obstacle inside, not only the initial pressure difference is low, but also the sludge containing microorganisms will not be formed inside the device over time, so the pressure difference is continuously maintained at a low state and no washing work is required, so there is no need to interrupt the operation of the equipment regularly.

[0067] The packing material refers to any substance used to increase the gas-liquid contact. For example, the packing material may include a Berl saddle, an Intalox saddle, a Raschig ring, a Lessing ring, a Pall ring, a Tellerette, a perforated plate, crushed stone, pellets, sponge, steel wool, granules, glass wool, or a combination thereof.

[0068] In addition, the washing part 130 may include nozzle ends NG1 ˜ NG3 .

[0069] The nozzle ends NG1 ˜ NG3 may include one or more nozzles N. As shown in FIG.

[0070] The nozzle N may be configured to spray the cleaning liquid WL toward the gas inlet 110 in a direction intersecting the direction of gravity (specifically, a direction perpendicular to the direction of gravity).

[0071] The washing liquid WL may include a neutral aqueous solution, an acidic aqueous solution, or an alkaline aqueous solution.

[0072] The neutral aqueous solution may be water.

[0073] The pH of the acidic aqueous solution may be 2 to 6. The acidic aqueous solution may include an aqueous sulfuric acid solution, an aqueous nitric acid solution, an aqueous hydrochloric acid solution, or a combination thereof.

[0074] The pH of the alkaline aqueous solution may be 8 to 12. The alkaline aqueous solution may include an aqueous sodium hydroxide solution, an aqueous calcium hydroxide solution, an aqueous potassium hydroxide solution, aqueous ammonia, magnesium hydroxide, or a combination thereof.

[0075] The number of nozzle ends NG1 to NG3 may be 3 to 10 (e.g., 3 to 6). When the number of nozzle ends NG1 to NG3 is less than 3, the exhaust gas treatment efficiency decreases, and when the number of nozzle ends NG1 to NG3 is greater than or equal to 10, there is a problem that the device size becomes too large.

[0076] The nozzle ends NG1 to NG3 may include four or more nozzles N, respectively.

[0077] The spray angle of the nozzle N can be 30 degrees to 170 degrees. When the spray angle of the nozzle N is less than 30 degrees, a dead zone where no water film is formed appears, thereby reducing the exhaust gas treatment efficiency. When it is greater than 170 degrees, the water film is destroyed by the force of the exhaust gas flow, thereby reducing the exhaust gas treatment efficiency.

[0078] In addition, the inner diameter of the nozzle N may be greater than or equal to 4 mm. When the inner diameter of the nozzle N is less than 4 mm, a uniform water film may not be formed, and nozzle clogging may occur.

[0079] In addition, each nozzle end (NG1, NG2 or NG3) may include a plurality of nozzles N. In this case, the spacing d between the nozzles N may be less than or equal to 800 mm. When the spacing d between the nozzles N is greater than 800 mm, a dead zone where no water film is formed may occur.

[0080] In addition, the nozzle ends NG1 to NG3 may be plural. In this case, the distance D between the nozzle ends NG1 to NG3 may be greater than or equal to 150 mm. When the distance D between the nozzle ends NG1 to NG3 is less than 150 mm, the washing liquid supply pipes P may interfere with each other and fail to form a water film.

[0081] Furthermore, the lateral wet exhaust gas purification device 100 may be configured to allow the exhaust gas WG to continuously flow in a direction intersecting the gravity direction (specifically, a direction perpendicular to the gravity direction) through the gas inlet 110 , the scrubber 130 , and the gas outlet 150 .

[0082] In addition, the transverse wet exhaust gas purification device 100 may further include an expansion portion 120 .

[0083] The expansion part 120 may be disposed between the gas inlet 110 and the washing part 130. Specifically, the expansion part 120 may be formed integrally therewith between the gas inlet 110 and the washing part 130. Such expansion part 120 may be configured such that the cross-sectional area of ​​its internal space continuously increases from the gas inlet 110 side to the washing part 130 side.

[0084] Furthermore, the expansion portion 120 may not include any flow obstructions such as filler materials and filters.

[0085] In addition, the transverse wet exhaust gas purification device 100 may further include a narrowing portion 140 .

[0086] The reduction portion 140 may be disposed between the washing portion 130 and the gas outlet 150. Specifically, the reduction portion 140 may be formed integrally therewith between the washing portion 130 and the gas outlet 150. Such a reduction portion 140 may be configured such that the cross-sectional area of ​​its internal space continuously decreases from the washing portion 130 side to the gas outlet 150 side.

[0087] In addition, the transverse wet exhaust gas purification device 100 may further include a demister (not shown) disposed between the scrubbing part 130 and the narrowing part 140 .

[0088] Furthermore, the narrowing portion 140 may not include any flow obstructions such as filler materials and filters.

[0089] In addition, the transverse wet exhaust gas purification device 100 may further include a washing liquid storage tank 160 .

[0090] The washing liquid storage tank 160 may be configured to store washing liquid WL.

[0091] In addition, the washing liquid storage tank 160 may further include a drain port (not shown) configured to discharge a portion of the washing liquid WL to the outside.

[0092] Below, reference Figure 4 The function and effect of the horizontal wet exhaust gas purification device 100 according to one embodiment of the present invention will be described in detail.

[0093] First, the waste gas WG is introduced into the scrubbing section 130 through the gas inlet 110 via the expansion section 120. At this time, the scrubbing liquid WL stored in the scrubbing liquid storage tank 160 is supplied to the nozzle N via the scrubbing liquid supply pipe P, and the nozzle N sprays the scrubbing liquid WL in a direction intersecting the gravity direction (specifically, a direction perpendicular to the gravity direction). At this time, the pollutants contained in the waste gas WG are removed (i.e., absorbed).

[0094] Thereafter, the exhaust gas WG from which pollutants have been removed, namely, the clean gas CG, is discharged to the outside of the horizontal wet exhaust gas purification device 100 through the gas outlet 150 via the narrowing portion 140. In addition, the washing liquid WL contacting the exhaust gas WG finally falls and is introduced into the washing liquid storage tank 160.

[0095] The horizontal wet exhaust gas purification device 100 according to one embodiment of the present invention configured as above has high exhaust gas treatment efficiency and low operating pressure differential (Operating Pressure Differential), can save installation land due to its small size, and can also effectively purify exhaust gas with a high particle content. On the other hand, the existing horizontal wet exhaust gas purification devices are equipped with filling materials or filters inside. This is because technicians in the relevant field are familiar with the low exhaust gas treatment efficiency when filling materials or filters are not installed inside the horizontal wet exhaust gas purification device. However, after many efforts, the inventors have finally developed a horizontal wet exhaust gas purification device that can maintain a high exhaust gas treatment efficiency without installing filling materials or filters inside.

[0096] Hereinafter, a wet exhaust gas purification method according to an embodiment of the present invention will be described in detail.

[0097] The wet exhaust gas purification method according to an embodiment of the present invention includes purifying the exhaust gas by using a washing liquid through the horizontal wet exhaust gas purification device 100 .

[0098] The wet exhaust gas purification method can be performed under the conditions that the linear velocity of the exhaust gas is less than or equal to 4 m / s and the pressure of the washing liquid sprayed through the nozzle is greater than or equal to 0.5 bar. When the pressure of the washing liquid sprayed through the nozzle is less than 0.5 bar, a water film may not be formed.

[0099] For example, the wet exhaust gas purification method may be performed under the condition that the pressure of the scrubbing liquid sprayed through the nozzle is greater than or equal to 1 bar to 2 bar.

[0100] Hereinafter, the present invention will be further described in detail by way of examples, but the present invention is not limited thereto.

[0101] Example 1: Manufacturing a horizontal wet exhaust gas purification device

[0102] Produce a Figure 4 A horizontal wet exhaust gas purification device of the structure shown in the figure was manufactured. Specifically, a horizontal wet exhaust gas purification device was manufactured in which the number of nozzle ends #NG was 4, each nozzle end included 4 nozzles, the spray angle NGθ of the nozzle was 120 degrees, the inner diameter ND of the nozzle was 5 mm, the spacing d between the nozzles was 800 mm, and the spacing D between the nozzle ends was 150 mm. In addition, a demister was provided between the washing section and the reduction section.

[0103] Example 2: Manufacturing a horizontal wet exhaust gas purification device

[0104] A lateral wet exhaust gas purification device having the same configuration as that of the first embodiment was manufactured, except that the number of nozzle ends #NG was changed to three.

[0105] Example 3: Manufacturing a horizontal wet exhaust gas purification device

[0106] A lateral wet exhaust gas purification device having the same configuration as that of the first embodiment was manufactured, except that the number of nozzle ends #NG was changed to six.

[0107] Example 4: Manufacturing a horizontal wet exhaust gas purification device

[0108] A lateral wet exhaust gas purification device having the same configuration as that of the first embodiment was manufactured, except that the spray angle NGθ of the nozzle was changed to 30 degrees.

[0109] Example 5: Manufacturing a horizontal wet exhaust gas purification device

[0110] A lateral wet exhaust gas purification device having the same configuration as that of the first embodiment was manufactured, except that the spray angle NGθ of the nozzle was changed to 170 degrees.

[0111] Example 6: Manufacturing a horizontal wet exhaust gas purification device

[0112] A lateral wet exhaust gas purification device having the same configuration as that of the first embodiment was manufactured, except that the inner diameter ND of the nozzle was changed to 4 mm.

[0113] Example 7: Manufacturing a horizontal wet exhaust gas purification device

[0114] A lateral wet exhaust gas purification device having the same configuration as that of the first embodiment was manufactured, except that the interval d between the nozzles was changed to 600 mm.

[0115] Example 8: Manufacturing a horizontal wet exhaust gas purification device

[0116] A lateral wet exhaust gas purification device having the same configuration as that of the embodiment 1 was manufactured except that the interval D between the nozzle ends was changed to 180 mm.

[0117] Reference Example 1: Manufacturing a horizontal wet exhaust gas purification device

[0118] A lateral wet exhaust gas purification device having the same configuration as that of the first embodiment was manufactured, except that the number of nozzle ends #NG was changed to two.

[0119] Reference Example 2: Manufacturing a Horizontal Wet Exhaust Gas Purification Device

[0120] A lateral wet exhaust gas purification device having the same configuration as that of the first embodiment was manufactured, except that the spray angle NGθ of the nozzle was changed to 20 degrees.

[0121] Reference Example 3: Manufacturing a Horizontal Wet Exhaust Gas Purification Device

[0122] A lateral wet exhaust gas purification device having the same configuration as that of the first embodiment was manufactured, except that the spray angle NGθ of the nozzle was changed to 180 degrees.

[0123] Reference Example 4: Manufacturing a horizontal wet exhaust gas purification device

[0124] A lateral wet exhaust gas purification device having the same configuration as that of the first embodiment was manufactured except that the inner diameter ND of the nozzle was changed to 3 mm.

[0125] Reference Example 5: Manufacturing a horizontal wet exhaust gas purification device

[0126] A lateral wet exhaust gas purification device having the same configuration as that of the first embodiment was manufactured, except that the interval d between the nozzles was changed to 1000 mm.

[0127] Reference Example 6: Manufacturing a horizontal wet exhaust gas purification device

[0128] A lateral wet exhaust gas purification device having the same configuration as that of the embodiment 1 was manufactured except that the interval D between the nozzle ends was changed to 130 mm.

[0129] The number #NG of nozzle ends of the horizontal wet exhaust gas purification device in the embodiments 1 to 8 and reference examples 1 to 6, the number #N of nozzles in each nozzle end, the injection angle NGΘ of the nozzle, the inner diameter ND of the nozzle, the spacing d between the nozzles, the spacing D between the nozzle ends, and the length L of the washing section are sorted out and shown in the following Table 1.

[0130] Table 1

[0131]

[0132] Evaluation Example 1: Evaluation of the operation and exhaust gas treatment efficiency of a horizontal wet exhaust gas cleaning device

[0133] The horizontal wet exhaust gas purification device manufactured by Examples 1 to 8 and Reference Examples 1 to 6 was used to treat the exhaust gas under the conditions of an ammonia concentration of 150 ppm (based on volume), a linear velocity of the exhaust gas of 4 m / s, and a nozzle injection pressure of 1.5 bar to obtain clean gas. At this time, a sulfuric acid aqueous solution (pH 2) was used as the washing liquid. The exhaust gas treatment efficiency was calculated according to the following mathematical formula 1, and the results are shown in the following Table 2.

[0134] Mathematical formula 1

[0135] Exhaust gas treatment efficiency (%) = (ammonia concentration in exhaust gas - ammonia concentration in clean gas) / ammonia concentration in exhaust gas × 100 Table 2

[0136]

[0137] Referring to Table 2, the horizontal wet exhaust gas purification devices manufactured by Examples 1 to 8 have a very simple structure because they do not include a filling material, a filter, and a demister, but the treatment efficiency of the pollutants (ammonia) in the exhaust gas is very high, which is greater than or equal to 98%. However, the treatment efficiency of the horizontal wet exhaust gas purification devices manufactured by Reference Examples 1 to 6 for the pollutants (ammonia) in the exhaust gas is low, which is less than 96%.

[0138] According to a horizontal wet exhaust gas purification device and a wet exhaust gas purification method according to an embodiment of the present invention, the exhaust gas treatment efficiency is high, the working pressure difference is low, and the installation land is saved due to its small size.

[0139] The present invention has been described above with reference to the accompanying drawings and embodiments, but they are exemplary, and those skilled in the art will appreciate that various modifications can be made therefrom and other equivalent embodiments can be derived. Therefore, the true technical protection scope of the present invention should be determined by the technical conception of the appended claims.

Claims

1. A horizontal wet exhaust gas purification device, comprising: Gas inlet; Gas outlet; as well as a scrubbing section arranged between the gas inlet and the gas outlet, The washing part includes a nozzle and a washing liquid supply pipe, but does not include any flow obstacles such as filling materials and filters. The nozzle is configured to spray a cleaning liquid, The cleaning liquid supply pipe is configured to supply cleaning liquid to the nozzle, and is configured to allow the exhaust gas to continuously flow in a direction intersecting with the gravity direction through the gas inlet, the cleaning unit, and the gas outlet.

2. The horizontal wet exhaust gas purification device according to claim 1 further comprises: An expansion portion is arranged between the gas inlet and the scrubbing portion.

3. The horizontal wet exhaust gas purification device according to claim 1 further comprises: A narrowing portion is arranged between the scrubbing portion and the gas outlet.

4. The horizontal wet exhaust gas purification device according to claim 3, wherein: The reduction portion includes a demister.

5. The lateral wet exhaust gas purification device according to claim 1, further comprising: The washing liquid storage tank is configured to store washing liquid.

6. The horizontal wet exhaust gas purification device according to claim 1, wherein: The washing section includes a nozzle end, and the nozzle end includes one or more nozzles. The nozzle is configured to spray the cleaning liquid toward the gas inlet side in a direction intersecting with the gravity direction.

7. The horizontal wet exhaust gas purification device according to claim 6, wherein: The number of the nozzle ends is 3 to 10.

8. The horizontal wet exhaust gas purification device according to claim 6, wherein: The nozzle end includes 4 or more nozzles.

9. The horizontal wet exhaust gas purification device according to claim 6, wherein: The spray angle of the nozzle is 30 degrees to 170 degrees.

10. The horizontal wet exhaust gas purification device according to claim 6, wherein: The inner diameter of the nozzle is greater than or equal to 4 mm.

11. The horizontal wet exhaust gas purification device according to claim 6, wherein: The nozzle end includes a plurality of nozzles, and the spacing between the nozzles is less than or equal to 800 mm.

12. The horizontal wet exhaust gas purification device according to claim 6, wherein: There are plural nozzle ends, and the spacing between the nozzle ends is greater than or equal to 150 mm.

13. A wet exhaust gas purification method, comprising: The exhaust gas is purified by using a scrubbing liquid by the lateral wet exhaust gas purification device according to any one of claims 1 to 12.

14. The wet exhaust gas purification method according to claim 13, wherein: It is carried out under the conditions that the linear velocity of the exhaust gas is less than or equal to 4 m / s, and the spray pressure of the washing liquid through the nozzle is greater than or equal to 0.5 bar.

15. The wet exhaust gas purification method according to claim 13, wherein: This is carried out under the condition that the washing liquid spray pressure is 1 bar to 2 bar.

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