KR20250026619A - Wet scrubber having cleaning device and cleaning method the same - Google Patents

Abstract

The present invention relates to a wet scrubber having a washing mode and a washing method thereof, comprising: a housing; a gas supply line installed to supply exhaust gas to the inside of the housing; a poling and a demister installed to sequentially pass exhaust gas as it rises; a gas discharge line installed to discharge purified gas passing through the poling and the demister; a lower nozzle disposed below the poling and installed to spray or downwardly inject a cleaning mixture; a nozzle line connected to supply the cleaning mixture to the lower nozzle; a cleaning mixture supply line installed to supply the cleaning mixture to the nozzle line; a cleaning mixture drain line installed to discharge the cleaning mixture collected in the housing; and at least one pump installed to supply the cleaning mixture to the cleaning mixture supply line, the cleaning mixture drain line, and the nozzle line, thereby purifying exhaust gas and allowing the poling and the demister used for exhaust gas purification to be washed while being built into the housing.

Description

Wet scrubber having cleaning mode and cleaning method thereof {Wet scrubber having cleaning device and cleaning method the same}

The present invention relates to a wet scrubber, and more particularly, to a wet scrubber having a cleaning mode for cleaning by spraying a cleaning mixture at high pressure onto a palling ring and a demister mounted in a housing, and a cleaning method thereof.

In general, exhaust gases emitted from various industrial facilities and environmental infrastructures are highly toxic, explosive, and corrosive, which is not only harmful to the human body, but can also cause environmental pollution if released into the atmosphere. Therefore, these exhaust gases require a purification process to reduce the content of harmful components below the permissible concentration, and it is legally required that only harmless gases that have undergone the purification process to remove such toxic substances be released into the atmosphere.

Accordingly, scrubbers are installed in various industrial facilities and environmental infrastructure to purify these harmful gases. Here, the scrubber is a device that removes particles that are the cause of harmful gases or odorous gases that generally cause air pollution by using a coating solution that is a mixture of liquid and gas. These scrubbers are available in wet, combustion, adsorption, or catalytic types.

For example, a conventional wet scrubber may be configured so that the hazardous gas, which comes into contact with the cleaning mixture sprayed from the nozzle while the hazardous gas is introduced from the bottom and then discharged upward, passes through the polling and demister. Accordingly, the hazardous gas introduced from the bottom may be partially purified by the cleaning mixture while flowing upward, and may be purified again while passing through the polling and demister before being discharged upward.

Meanwhile, the polling and demister can remove contaminants from the passing harmful gases, thereby allowing the purified gases to be discharged.

However, if these polling and demisters are used for a long time, excessive contaminants may be attached, which may reduce the purification performance. Therefore, a cleaning operation may be required to recycle the polling and demisters.

Republic of Korea Patent No. 10-1921869 (announced on February 13, 2019) Republic of Korea Patent No. 10-0243639 (announced on February 1, 2000)

The purpose of the present invention, which is achieved by the above-mentioned needs, is to provide a wet scrubber having a cleaning mode in which a polling or demister built into a housing of the scrubber having a polling and a demister built into it is cleaned by a cleaning mixture sprayed at high pressure, and a cleaning method thereof.

In order to achieve the above-described object, a wet scrubber having a washing mode according to the present invention may be formed by including: a housing; a gas supply line installed to supply exhaust gas to the inside of the housing; a poling and a demister installed to sequentially pass the exhaust gas as it rises; a gas drain line installed to discharge purified gas passing through the poling and the demister; a lower nozzle disposed below the poling and installed to spray or downwardly inject a washing mixture; a nozzle line connected to supply the washing mixture to the lower nozzle; a washing mixture supply line installed to supply the washing mixture to the nozzle line; a washing mixture drain line installed to discharge the washing mixture collected in the housing; and at least one pump installed to supply the washing mixture to the washing mixture supply line, the washing mixture drain line, and the nozzle line.

Here, in the gas purification mode, exhaust gas is supplied through the gas supply line, purified through the polling and demister, and then discharged through the gas discharge line.

And in the cleaning mode, the gas supply line is closed and the cleaning mixture is sprayed at high pressure through the lower nozzle so that the polling can be cleaned.

Additionally, in the gas purification mode, a cleaning mixture is sprayed from the lower nozzle so that some of the pollutants in the exhaust gas can be purified.

In addition, the cleaning mixture supply line and the gas supply line may be installed in close proximity or adjacent to each other by a certain length to allow heat exchange between the cleaning mixture and the high-temperature exhaust gas to heat the cleaning mixture, or a heater may be installed in the cleaning supply line or nozzle line.

In addition, the device may further include at least one of: an upper nozzle disposed above or below the demister, or interposed between demisters manufactured in multiple stages, and installed to spray a cleaning mixture at high pressure to clean the demister; a middle nozzle disposed above the polling and installed to spray a cleaning mixture downward to clean the polling; a recovery line installed to recover the cleaning mixture collected at the lower part of the housing and supply it to the nozzle line; a filter installed in the recovery line to purify the cleaning mixture; a stirrer inserted and installed inside the polling and installed to stir individual products; and a stirrer device for stirring the cleaning mixture so that contaminants in the cleaning mixture float and flow into the recovery line.

Here, the agitator may be provided with a rotating shaft that rotates in place by external power, and a plurality of stirring blades attached to the rotating shaft and rotating vertically laterally. Alternatively, the agitator may be provided with a rotating plate that is arranged in the middle of the lateral poling and rotates horizontally, and a plurality of stirring protrusions attached to the upper or lower surface of the rotating plate.

In addition, in the cleaning mode, the cleaning mixture may be filled inside the housing so that it is submerged up to the polling or demister inside the housing. At this time, the lower nozzle may be installed to spray the cleaning mixture in the form of a mist in the gas purification mode, to spray the cleaning mixture at high pressure in the cleaning mode to generate a vortex, or to supply external air to generate aeration.

In addition, at least one of an upper water level sensor installed on the upper side of the polling or on the upper side of the demister to detect the water level of the cleaning mixture; and an aerator installed on the bottom of the housing to generate aeration when the cleaning mixture is filled may be further installed.

And a cleaning mixture can be made including water, shell powder, baking soda, and sodium percarbonate.

Meanwhile, in a wet scrubber equipped with a cleaning mode according to the present invention, a gas purification mode for purifying exhaust gas and a cleaning mode for cleaning contaminated pollutants and demisters while purifying gas can be operated in a certain sequence.

Here, the gas purification mode may include a 10th process (S10) in which gas is supplied to the lower part of the housing through a gas supply line; a 12th process (S12) in which gas is purified while passing through a poling and a demister in sequence; and a process (S13) in which purified gas is discharged outside the housing.

In addition, the washing mode may include a 20th process (S20) in which a washing mixture is sprayed upward at high pressure from a lower nozzle installed on the lower side of the polling to wash the polling.

Here, an 11th process (S11) may further be included in which a cleaning mixture (W) is sprayed in the form of a mist through a lower nozzle (160) installed on the lower side of the poling (140) inside the housing into which gas is introduced between the 10th process (S10) and the 12th process (S12).

In addition, after the 20th process (S20), the method may further include a 23rd process (S23) in which the washing mixture of the sleeping portion of the washing mixture is recovered through a recovery line, purified by a filter, and supplied to the lower nozzle; and a 24th process (S24) in which the washing mixture is discharged when the washing of the polling and demister is completed.

Here, the washing mode may be performed by at least one of the following processes: a process in which a washing mixture is sprayed at high pressure from a middle nozzle installed on the upper side of the polling so that the polling is washed; a process in which a washing mixture is sprayed at high pressure from an upper nozzle disposed on the upper or lower side of the demister or interposed between demisters manufactured in multiple stages so that the demister is washed; a process in which individual products are stirred by the operation of a rotating shaft inside the polling and a plurality of stirring blades protruding from the rotating shaft and rotating vertically laterally or a rotating plate rotating horizontally laterally and a plurality of stirring protrusions attached to the upper and lower surfaces of the rotating plate; a process in which a washing mixture supplied to the lower nozzle is heat-exchanged by being in close proximity to a high-temperature exhaust gas flowing in a gas supply line or is heated by a heater so that the temperature is increased; and a process in which the washing mixture is stirred so that contaminants included in the washing mixture are floated and introduced into a recovery line.

In addition, the washing mode may further include a 21st process (S21) in which a washing mixture is filled inside the housing between the 20th process (S20) and the 23rd process (S23) so that the polling or demister is submerged; and a 22nd process (S22) in which aeration is generated in an aerator arranged inside the housing, and the washing mixture is sprayed at high pressure from a lower nozzle on the lower side of the polling or an upper middle nozzle, or an upper nozzle interposed between the upper or lower sides of the demister or a multi-stage demister to generate a vortex, or air is ejected from the lower nozzle, the middle nozzle, or the upper nozzle to generate aeration, so that the polling and the demister are washed.

Here, the 21st process (S21) to the 24th process (S24) described above can be performed with the 20th process (S20) being omitted or excluded. And each process (S20 to S24) can be performed sequentially or at least two or more processes can be overlapped.

As described above, according to the present invention, the scrubber is configured with both a gas purification mode and a cleaning mode, and not only does it purify exhaust gas, but the polling and demister used for exhaust gas purification are cleaned while mounted, so that the work time can be shortened compared to cleaning the polling and demister separately.

In addition, by spraying a cleaning mixture to clean the polling and demister, and recovering and purifying the used cleaning mixture for recycling, it is possible to save operating costs and protect the environment.

In addition, since the individual parts inside the polling are stirred and the cleaning mixture is sprayed at high pressure from above or below the polling to clean the polling, there is an effect that the cleaning efficiency of the polling can be significantly improved.

In addition, since the cleaning mixture is sprayed at high pressure from the upper or inner side of the demister to clean it, the cleaning efficiency of the demister can be significantly improved.

And by developing the optimal cleaning mixture for cleaning polling and demister, it is possible to obtain a cleaning efficiency that is far superior to that of existing cleaning water.

The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention, serve to further understand the technical idea of the present invention; therefore, the present invention should not be construed as being limited to matters described in such drawings.
FIG. 1 is a schematic drawing of a wet scrubber equipped with a cleaning device according to a preferred embodiment of the present invention.
Figure 2 is a drawing illustrating another embodiment of Figure 1.
Figure 3 is a drawing illustrating another embodiment of Figure 1.
Figures 4 and 5 are process diagrams illustrating a method for cleaning the wet scrubber illustrated in Figure 1.

Hereinafter, with reference to the attached drawings, preferred embodiments will be described in detail so that those skilled in the art can easily practice the present invention. In addition, among the configurations mentioned in various embodiments, similar configurations and related configurations in each embodiment may be replaced, exchanged, or added. However, when describing the operating principle of preferred embodiments of the present invention in detail, if it is determined that a specific description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

<Composition>

A cleaning device of a wet scrubber according to a preferred embodiment of the present invention may include a gas purification module (100) and a cleaning module (200), as shown in FIGS. 1 and 2.

A gas purification module (100) may include a housing (110), a gas supply line (120), a gas discharge line (130), a polling (140), a demister (150), a lower nozzle (160), an upper nozzle (161), a cleaning mixture supply line (170), a lower water level sensor (S), a nozzle line (180), and a cleaning mixture discharge line (190).

Here, the housing (110) can be manufactured to have a certain size and to have a polling (140) and a demister (150) mounted in the internal space. In addition, the housing (110) can be equipped with a gas supply line (120) installed at the bottom to allow exhaust gas to flow in, and a gas discharge line (130) processed at the top to allow gas purified inside to be discharged to the outside.

Additionally, a gas supply line (120) may be installed at the bottom of the poling (140) to allow external contaminated exhaust gas to flow into the housing (110). This gas supply line (120) may be closed while the cleaning process is performed by the cleaning module (200).

A gas discharge line (130) may be installed at the top so that purified gas passing through the polling (140) and demister (150) inside the housing is discharged outside the housing (110). This gas discharge line (130) may be closed while the cleaning process is performed by the cleaning module (200).

In addition, the polling (140) is a member that accommodates a plurality of individual parts to purify exhaust gas, and can be built in such a way that exhaust gas introduced into the housing (110) passes through it. This polling (140) can be manufactured with a porous structure so that when contaminated gas passes through, it can pass through as wide an area as possible to increase purification efficiency. Contaminants detached from the gas can be attached to this polling (140). In addition, the polling (140) whose purification ability decreases over time can be cleaned by the operation of the cleaning module (200).

In addition, the demister (150) is a member for removing mist from the gas that has passed through the polling (140), and can be installed so that the gas that has passed through the polling (140) flows to the gas discharge line (130) after being introduced. Of course, the demister (150) can also filter out contaminants remaining in the gas that has passed through the polling (140). And the demister (150) that has become dirty over time can be cleaned by the operation of the cleaning module (200). And the demister (150) can be manufactured as an integral part or manufactured in multiple stages that are mutually attached. At this time, the multi-stage manufacturing is to allow the upper nozzle (161) described below to be interposed. Of course, when manufactured as an integral part, the upper nozzle (161) can be inserted and fixed.

In addition, the lower nozzle (160) and the middle nozzle (162) may be installed, for example, to be positioned below and above the polling (140), and to spray a cleaning mixture (W) in the form of a mist to remove pollutants contained in exhaust gas flowing into the housing (110) in the gas purification mode, and to strongly spray the cleaning mixture (W) in the form of a high-pressure stream of water to clean the polling (140) in the cleaning mode. In addition, the lower nozzle (160) and the middle nozzle (162) may be installed to spray the cleaning mixture (W) to generate a vortex or to eject outside air to generate aeration when the cleaning mixture (W) is filled to submerge the polling (140) or the demister (150). Of course, both the lower nozzle (160) and the middle nozzle (162) may be installed, or only one of them may be installed.

In addition, the upper nozzle (161) may be positioned above or below the demister (150) and may be installed to spray a cleaning mixture (W) in the form of a mist to remove contaminants contained in the gas in the gas purification mode, or to strongly spray a cleaning mixture (W) in the form of a high-pressure stream of water to clean the demister (150) in the cleaning mode. In addition, when the cleaning mixture (W) is filled to submerge the demister (150), the cleaning mixture (W) may be sprayed to generate a vortex. In addition, the upper nozzle (161) may be inserted and placed into a demister (150) that is formed integrally or in multiple stages and may be installed to spray a cleaning mixture (W) at high pressure to clean the demister (150) in the cleaning mode.

In addition, the washing mixture supply line (170) may be installed to be connected to the nozzle line (180) connected to the lower nozzle (160), the middle nozzle (162), and the upper nozzle (161). One or more pumps (P) may be installed in the washing mixture supply line (170) to supply the washing mixture (W) according to the flow distance and height of the washing mixture (W). For example, as shown in FIG. 1, one pump (P) may be installed near the lower nozzle (160), the middle nozzle (162), or the upper nozzle (161), and a separate pump may be further installed to supply the washing mixture (W) from the storage tank to the pump (P). In addition, a lower water level sensor (S) may be installed, which is located inside the housing (110) and below the polling (140), and is installed to detect the water level of the washing mixture (W) in the washing mode and maintain a constant water level.

In addition, the nozzle line (180) may be connected to supply the cleaning mixture (W) introduced into the cleaning mixture supply line (170) to the lower nozzle (160), the middle nozzle (162), or the upper nozzle (161). At this time, the cleaning mixture (W) may be configured to flow by a pump installed in the nozzle line (180) or a pump (P) installed in the cleaning mixture supply line (170).

And the washing mixture drain line (190) can be installed at the bottom of the housing (110) so that the washing mixture (W) sprayed through the lower nozzle (160), the middle nozzle (162), or the upper nozzle (161) is discharged when the lower water level sensor (S) detects the water level. At this time, the washing mixture (W) can be naturally drained by gravity, or a separate pump (not shown) can be installed in the washing mixture drain line (190) for forced drainage.

Meanwhile, the washing module (200) may be configured to wash the polling (140) and the demister (150) built into the housing (110). At this time, the inner surface of the housing (110) may also be washed. To this end, the washing module (200) may include an upper water level sensor (210), a recovery line (220), a filter (230), an aerator (240), and a stirring device (260). Here, the lower nozzle (160), the middle nozzle (162), the upper nozzle (161), and the nozzle line (180) may spray the washing mixture (W) as a mist from the gas purification module (100) to primarily filter out pollutants from the exhaust gas, and may spray the washing mixture (W) at high pressure from the washing module (200) to wash the polling (140) or the demister (150).

Here, the upper water level sensor (210) is positioned above the polling (140) or above the demister (150), and detects when the housing (110) is filled with the cleaning mixture (W) to the extent that the polling (140) or the demister (150) is submerged, and can be installed so that the supply of the cleaning mixture (W) is stopped when the preset water level is reached. Hereinafter, the description will be limited to the case where the cleaning mixture (W) is filled to the extent that the polling (140) is submerged.

In addition, the recovery line (220) may be installed to recover the cleaning mixture (W) collected in the housing (110) in the cleaning mode from the vicinity of the water surface and supply it to the nozzle line (180). The recovery line (220) may be configured to be equipped with a pump (P) for draining and supplying the cleaning mixture (W), or a separate pump may be installed.

In addition, the filter (230) may be installed on the recovery line (220) to purify the cleaning mixture (W) flowing through the recovery line (220). At this time, the filter (230) may be manufactured so as not to filter the materials constituting the cleaning mixture (W), particularly the shell powder having a micrometer size. Accordingly, the pollutants generated while washing the polling (140) and the demister (150) are discharged through the recovery line (220) together with the cleaning mixture (W), and then filtered by the filter (230), thereby purifying the cleaning mixture (W). Alternatively, the shell powder may be filtered, and then the shell powder may be separated by the filter (230) and washed separately.

Additionally, an aerator (240) may be installed on the inner bottom of the housing (110). The aerator (240) may be installed to provide aeration by supplying countless air bubbles for cleaning when the housing (110) is filled with a cleaning mixture (W).

And the stirring device (260) may be installed inside the housing (110) and may be installed to stir the cleaning mixture (W) collected or filled in the lower part of the housing (110) in the cleaning mode so that the contaminants included in the cleaning mixture (W) float and smoothly flow into the recovery line (220). This stirring device (260) may have a general configuration having a rotating shaft and stirring blades, or may be an aerator (240) described below.

Meanwhile, the aerator (240) or the upper nozzle (161) may be excluded. As shown in FIG. 2, when the aerator (240) is excluded, the lower nozzle (160) or the middle nozzle (162) may be installed to also perform the function of the aerator (240). As an example, the lower nozzle (150) or the middle nozzle (162) may be installed so that the cleaning mixture is sprayed in the form of mist in the gas purification mode, and the cleaning mixture (W) is filled up to the top of the poling (140) in the cleaning mode, so that the cleaning mixture (W) is sprayed at high pressure to directly clean, create a vortex or swirl, or so that external air is supplied to create aeration. To this end, the lower nozzle (160) and the middle nozzle (162) may be connected to an external air supply line (not shown) in addition to the nozzle line (180), and may be installed so that the cleaning mixture (W) or external air is supplied according to an operation control signal.

Meanwhile, the cleaning mixture (W) is characterized by including water, shell powder, baking soda, and sodium percarbonate. Therefore, the shell powder, baking soda, and sodium percarbonate are characterized by being mixed in a volume ratio of 0.05 to 0.25 : 0.03 to 0.05 : 0.03 to 0.05 with respect to 100 volume ratio of the water. The baking soda and sodium percarbonate can further increase the cleaning effect when mixed in the same weight ratio with respect to the water. In addition, the cleaning mixture (W) may further include at least one selected from oleic acid, soy colloid, alkylbenzene sulfonate, chamomile recutita extract, and Salvia officinalis extract. Therefore, at least one of the above oleic acid, soy colloid, and alkylbenzene sulfonate can be mixed in a volume ratio of 0.04 to 0.06 : 0.12 to 0.2 : 0.01 to 0.02 : 0.015 to 0.025 : 0.015 to 0.025 with respect to 100 volume ratio of the water.

The above-described shell powder can be ground into micrometer size and included in a washing mixture (W). The above-described shell powder can be manufactured through the following six processes. That is, a process of preparing and washing shells; a process of drying the washed shells under natural light for 24 to 72 hours; a process of first crushing the dried shells with a roll mill to an average particle diameter of 1 to 3 mm; a process of low-temperature firing the first-pulverized shells at 400 to 500°C for 10 to 20 hours and then high-temperature firing at 700 to 1,000°C for 5 to 10 hours; and a process of secondarily crushing the fired shells into a fine powder.

The above shells may be at least one selected from clam shells, cockle shells, mussel shells, scallop shells, and oyster shells, but are not limited thereto. The clam shells have various patterns such as stripes and wavy patterns and are composed of 89 to 99% calcium carbonate, 1 to 2% calcium phosphate, and others. The cockle shells are generally oval and are composed of 89 to 99% calcium carbonate, 1 to 2% calcium phosphate, and others. The clam shells have a shape close to circular and are composed of 89 to 99% calcium carbonate, 1 to 2% calcium phosphate, and others. The scallop shells have various colors, are fan-shaped, and are composed of 89 to 99% calcium carbonate, 1 to 2% calcium phosphate, and others. The oyster shells are composed almost entirely of calcium carbonate, and also contain gypsum and others.

The process of preparing and washing the shells above is a process of removing impurities or contaminants in the shells, and it may be desirable to wash them using fresh water.

The above drying process is intended to remove salt and odor remaining in the washed shells, and the washed shells may be dried for 24 to 27 hours, but is not limited thereto.

The above first crushing process can crush the shells with an average particle diameter of 1 to 3 mm using a roll mill. If the average particle diameter of the shells is crushed to less than 1 mm, there is a risk that the shells will be crushed too finely and may scatter, and if the shells are crushed to more than 3 mm, the firing described below may not occur properly. As another example, the above first crushed shell powder can be fired and crushed, but if the temperature of the water is lower than 28°C when preparing the washing mixture (W), the above first crushed shell powder can be used. That is, by using an underwater motor installed in a container containing the washing mixture (W) to which the above first crushed powder has been added, bubbles are generated, and at the same time, turbulence is used to primarily remove residual contaminants by collision between the large shell powder particles and the above-described pollutants, and over time, as the shell powder dissolves in water, the residual contaminants can be secondarily removed.

The above-mentioned calcination process can be performed by performing low-temperature calcination at 400 to 500°C for 10 to 20 hours in an air- or oxygen-free state, and then high-temperature calcination at 700 to 1,000°C for 5 to 10 hours in the air. Therefore, if the calcination temperature and time are below the range, impurities may remain, and the calcination reaction may not occur properly, making it difficult to increase the content of calcium carbonate, and if the calcination temperature and time are above the range, the problem of dehydration of the shell may occur. This two-step calcination can enhance the antifungal and antibacterial effects as the content of calcium carbonate increases. Ultimately, the washed polling and the demister can be protected from mold, etc. by the antibacterial and antibacterial effects of the washing mixture (W).

The above secondary crushing process can be used to manufacture shell powder having an average particle diameter of 1 to 5 ㎛. If the average particle diameter of the secondary crushed shell powder is less than 1 ㎛, it may be difficult for the washing mixture (W) to be effective, and if it exceeds 5 ㎛, it may not be properly mixed with other ingredients.

Therefore, the shell powder can be mixed in a volume ratio of 0.05 to 0.25 with respect to 100 volume ratio of water in the washing mixture (W). If the volume ratio of the shell powder is less than 0.05, the antifungal and antibacterial effects of the washing mixture (W) may not be properly achieved, and if it exceeds 0.25, the content of other components may be reduced, resulting in the improper cleaning effect.

The baking soda may be included in the cleaning mixture (W). The baking soda may be referred to as sodium bicarbonate or sodium bicarbonate. The baking soda is an environmentally friendly material with excellent cleaning power and has weakly alkaline properties. The baking soda is weakly alkaline and can neutralize contaminants or grease made of fatty acids and change them into water-soluble ones. Therefore, when the baking soda and water are used, contaminants or grease can be cleanly removed without using a detergent that causes environmental pollution. In addition, the baking soda may be in powder, granule, liquid, etc. When the baking soda in powder, granule, or liquid form is used with water, contaminants adhered to the polling and the demister can be washed by the spraying force. In addition, after washing, the polling and the demister can be restored to their original color and recycled.

In addition, the baking soda, which is slightly alkaline, has a characteristic of delaying oxidation. Therefore, when using the washing water containing baking soda, the oxidation occurrence time of the objects to be washed, i.e., the polling and the demister, can be delayed by more than 20 times compared to when using only the washing water. Therefore, the life of the polling and the demister can be extended. Therefore, the baking soda may be included in the washing mixture (W) in a volume ratio of 0.03 to 0.05 with respect to 100 volume ratio of the water. When the volume ratio of the baking soda is less than 0.03, the cleaning effect may not be exerted and contaminants may remain in the polling and the demister, and when it exceeds 0.05, the performance may not be properly exerted.

The above sodium percarbonate may be included in the cleaning mixture. The sodium percarbonate may be referred to as sodium percarbonate or sodium percarbonate. The sodium percarbonate is a colorless, hygroscopic crystal and a solid that dissolves in water. The sodium percarbonate is an adduct of sodium carbonate and hydrogen peroxide. That is, when the sodium percarbonate is dissolved in water, it decomposes into sodium carbonate and hydrogen peroxide, and nascent oxygen, which has only one oxygen atom, is generated from the hydrogen peroxide. The nascent oxygen allows it to be used as a bleaching agent. The following chemical formula is the decomposition of sodium percarbonate by water.

< Chemical Formula > - Decomposition of Sodium Percarbonate in Water

2 Na ₂ CO ₃ · 3 H ₂ O ₂ → 2 Na ₂ CO ₃ + 3 H ₂ O ₂

Therefore, the sodium percarbonate may be included in the washing mixture (W) in a volume ratio of 0.03 to 0.05 with respect to 100 volume ratio of the water. When the volume ratio of the sodium percarbonate is less than 0.03, the bleaching performance may be reduced so that the bleaching of the polling and the demister may not be performed properly, and when it exceeds 0.05, the bleaching performance may be too excessive, which may shorten the lifespan of the polling and the demister.

In addition, it may be preferable that the baking soda and the sodium percarbonate are mixed in the same volume ratio with respect to the water. As another example, the baking soda and the sodium percarbonate may be mixed in different volume ratios with respect to the water.

The above oleic acid may be included in the washing mixture (W). The above oleic acid may be referred to as lactic acid. The above oleic acid is contained in most animal and vegetable oils and is a main component of oils such as olive oil and camellia oil. The above oleic acid is an unsaturated fatty acid and is a colorless and odorless liquid. The above oleic acid may be used as a cosmetic, pharmaceutical additive, fabric softener, etc.

Therefore, the oleic acid may be included in the washing mixture (W) in a volume ratio of 0.04 to 0..06 with respect to 100 volume ratio of the water. If the volume ratio of the oleic acid is less than 0.04, there is a concern that the performance of the emulsifier may be insufficient, and if it exceeds 0.06, there is a concern that the function may not be properly performed.

The soy colloid may be included in the cleaning mixture (W). The soy colloid is an environmentally friendly surfactant that does not use any synthetic detergent at all. The soy colloid, as a surfactant, can help alleviate skin diseases such as atopy and allergies in addition to its cleansing function. In addition, the soy colloid has antibacterial, antifungal, and deodorizing effects. In the present invention, the polling and the demister can act as antibacterial and antifungal effects.

Therefore, the soy colloid may be included in the cleaning mixture (W) at a volume ratio of 0.12 to 0.2 with respect to 100 volume ratio of the water. If the volume ratio of the soy colloid is less than 0.12, the cleaning function, antibacterial properties, antifungal properties, etc. may be reduced, while if it exceeds 0.2, the desired function may not be properly exhibited.

The above alkylbenzene sulfonate may be included in the detergent mixture (W). The above alkylbenzene sulfonate is a type of anionic surfactant. In addition, the above alkylbenzene sulfonate may be widely used as a neutral detergent.

Therefore, the alkylbenzene sulfonate may be included in the cleaning mixture (W) in a volume ratio of 0.01 to 0.02 with respect to 100 volume ratio of the water. When the volume ratio of the alkylbenzene sulfonate is less than 0.01, the cleaning function may be reduced, while when it exceeds 0.02, the desired function may not be properly exhibited.

The above Chamomile Recutita extract may be included in the washing mixture (W). The above Chamomile Recutita is one of the herbs that is native to England and is cultivated worldwide. The above Chamomile Recutita is an annual plant with no hairs, an upright stem, and many round, compound branches.

In addition, the above chamomile recutita contains beta-carotene, sodium, niacin, protein, carbohydrates, zinc, vitamin A, vitamin B1, vitamin B2, vitamin B6, vitamin C and vitamin E, dietary fiber, pollen, lipids, zinc, folic acid, phosphorus, iron, potassium, calcium, etc.

In addition, the above chamomile recutita is used in various forms and for various purposes such as extracts, powders, and essential oils due to its various effects. In particular, the above chamomile recutita contains abundant vitamin C and terpene, an antioxidant, so it can remove free radicals. As a result, the above chamomile recutita has the effects of maintaining healthy skin through skin soothing and moisturizing, anti-inflammation and anti-bacterial, and inhibiting active oxygen to prevent aging.

The chamomile recutina extract included in the washing mixture (W) is prepared by washing the chamomile recutita, adding 10 times each of water, ethanol, and methanol as extraction solvents per 100 g of chamomile recutita, extracting the mixture three times for 3 hours each using an extraction device equipped with a reflux cooling tube at 60°C, and then filtering with Whatman No. 1 (product of Cytiva). The filtered extract was aged at room temperature for 3 days to prepare the chamomile recutina extract. By adding the chamomile recutita extract to the washing mixture (W), not only the worker's skin protection during work can be enhanced, but also the antibacterial effect of the polling and the demister can be increased.

Therefore, the chamomile recutina extract may be included in the cleaning mixture (W) at a volume ratio of 0.015 to 0.025 with respect to 100 volume ratio of the water. If the volume ratio of the chamomile recutina extract is less than 0.015, it may be difficult to protect the skin of workers and have an antibacterial effect, and if it exceeds 0.025, the cleaning effect of the cleaning mixture (W) may be reduced due to a decrease in the content of other ingredients.

The above Salvia officinalis extract may be included in the washing mixture (W). The above Salvia officinalis is called sage and is an evergreen shrub belonging to the Lamiaceae family. The above sage is derived from the meaning of ‘healthy’ and ‘treating’. The above Salvia officinalis is native to the Mediterranean coast and southern Europe, and is widely distributed in tropical or temperate regions.

In addition, the Salvia officinalis mainly contains phenol, terpenoid, flavonoid components, etc. The flowers, leaves and roots of the Salvia officinalis have an antibacterial effect. That is, according to the research results, the Salvia officinalis shows a significant inhibitory effect on Staphylococcus aureus, hemolytic streptococcus and corynebacteria. In addition, the oil of the Salvia officinalis increases the susceptibility of Staphylococcus aureus, Streptococcus albus and Salmonella strains to antibiotics such as erythromycin, tetracycline, chloramphenicol, gentamicin, kanamycin, streptomycin and polymyxin. In addition, the oleanolic acid of the Salvia officinalis has an inhibitory effect on HIV-1 reverse transcriptase. In addition, the hexane and ethyl acetate extracts of the above Salvia officinalis have anti-inflammatory effects by inhibiting the activity of inflammatory cytokines. In addition, the hexane and ethyl acetate extracts inhibit TNF-α protein and mRNA expression, interleukin-6 synthesis, nitrite accumulation, and inducible nitric oxide synthase mRNA expression in RAW2647 cells stimulated with lipopolysaccharide. In addition, the above Salvia officinalis has antioxidant and tranquilizing effects.

The Salvia officinalis extract included in the washing mixture (W) is prepared by washing the Salvia officinalis, adding 10 times each of water, ethanol, and methanol as extraction solvents per 100 g of Salvia officinalis, extracting the mixture at 60°C with an extraction device equipped with a reflux cooling tube for 3 hours each, and then filtering the mixture with Whatman No. 1 (product of Cytiva). The filtered extract was aged at room temperature for 3 days to prepare the Salvia officinalis extract. By adding the Salvia officinalis extract to the washing mixture (W), not only the worker's skin can be protected during work, but also the antibacterial effect of the polling and the demister can be increased.

Therefore, the Salvia officinalis extract may be included in the cleaning mixture (W) at a volume ratio of 0.015 to 0.025 with respect to 100 volume ratio of the water. If the volume ratio of the Salvia officinalis extract is less than 0.015, it may be difficult to protect the skin of workers and have an antibacterial effect, and if it exceeds 0.025, it may reduce the cleaning effect of the cleaning mixture (W).

<How it works>

Hereinafter, the operation of the wet scrubber in the gas purification mode and the cleaning mode according to the embodiment of the present invention described above will be described with reference to FIGS. 4 and 5.

<Gas purification mode>

The gas purification mode can be operated to purify the exhaust gas and discharge clean gas.

As shown in Fig. 4, in the gas purification mode, first, exhaust gas is supplied into the housing (110) (S10). Exhaust gas containing pollutants can be supplied into the lower interior of the housing (110) through the gas supply line (120). The exhaust gas supplied in this way can rise from the lower part to the upper part of the housing (110).

Next, the cleaning mixture (W) is sprayed (S11). The cleaning mixture (W) is sprayed from the lower nozzle (160), and through this, the exhaust gas can be purified primarily. At this time, rather coarse-grained contaminants contained in the exhaust gas can be attached to the cleaning mixture (W) and detached from the gas and dropped. In addition, the cleaning mixture (W) is sprayed from the middle nozzle (162), and the exhaust gas can be purified again. This process (S11) can be omitted as needed.

Next, the exhaust gas is purified while passing through the polling (140) and the demister (150) (S12). The gas from which coarse particle contaminants have been removed may sequentially pass through the polling (140) and the demister (150). At this time, if the upper nozzle (161) is installed above the demister (150), a cleaning mixture (W) for gas purification may be sprayed from the upper nozzle (161).

Finally, the purified gas is discharged (S13). In this way, as the gas passes through the polling (140) and the demister (150), all contaminants are removed, and the purified gas can be discharged to the outside through the gas discharge line (130).

And the washing mixture (W) that falls and collects at the bottom of the housing (110) can be kept at a constant water level through the lower water level sensor (S) and the washing mixture drain line (190). Of course, the washing mixture (W) may not collect and may be discharged immediately upon falling.

<Washing Mode>

The cleaning mode may be operated to clean the contaminated polling (140) and demister (150) while purifying the gas. As illustrated in FIGS. 4 and 5, the cleaning mode may be selected when cleaning of the contaminated polling (140) and demister (150) is required while operating in the purification mode. In addition, the cleaning mode may include a high-pressure spray cleaning configured to spray a cleaning mixture (W) to clean the polling (140) or demister (150), recover and purify the cleaning mixture (W), reuse it, and then discharge it, and an aeration cleaning in which the polling (140) or demister (150) is immersed in the cleaning mixture (W) during the cleaning process to clean it. The high-pressure spray cleaning and the aeration cleaning may be performed alone or in combination, and a description will be given below of a case where they are performed in parallel.

As shown in Fig. 5, the washing mode first sprays the washing mixture (W) upward at high pressure through the lower nozzle (160) to wash the polling (140) (S20). As a result, individual items within the polling (140) can be washed by the washing mixture (W).

In addition, a middle nozzle (162) and an upper nozzle (161) are installed, and a cleaning mixture (W) is sprayed at high pressure from the middle nozzle (162) and the upper nozzle (161) so that the polling (140) and the demister (150) can be cleaned. The cleaning mixture (W) sprayed in this way is collected at the bottom of the housing (110) together with contaminants, and the circulation and purification process (S23) described below can be performed. Alternatively, the cleaning mixture (W) that has fallen to the bottom of the housing (110) together with contaminants can be drained as is.

Here, the washing process (S20) may be completed in a short time so that only the polling (140) is washed, or the demister (150) is also washed with the washing mixture (W), and the washing mixture (W) is drained.

In addition, in the washing process (S20), individual parts of the poling (140) can be stirred by a rotating shaft (251) installed inside the poling (140) and a plurality of stirring blades (252) attached to the rotating shaft (251) and rotating vertically laterally, or a rotating plate (253) and a plurality of stirring protrusions (254) protruding from the upper and lower surfaces of the rotating plate (253) and rotating horizontally. Accordingly, since the individual parts are washed while being stirred, the washing efficiency can be significantly improved.

And, since the washing mixture (W) supplied through the lower nozzle (160) is placed in close proximity to the high-temperature exhaust gas flowing through the gas supply line (120) and exchanges heat with it, or is heated by the heater (171) and increases in temperature, the washing efficiency can be significantly improved.

Next, the housing (110) is filled with a cleaning mixture (W) (S21). While the above process (S20) is in progress, the cleaning mixture (W) is collected, and while being collected, it may be additionally supplied, or the cleaning mixture (W) used in the above process (S20) may be completely drained, and then a new cleaning mixture (W) may be collected and filled into the housing (110). The cleaning mixture (W) may be filled so that the polling (140) or the demister (150) is submerged, and the water level thereof may be detected by the upper water level sensor (210), and when the set water level is reached, the supply may be stopped. At this time, the housing (110) may be manufactured to be sealed while withstanding the water pressure of the cleaning mixture (W).

Next, the cleaning mixture (W) is aerated or vortexed to wash the polling (140) and the demister (150) again (S22). When the cleaning mixture (W) is filled in the housing (110), the cleaning mixture (W) may be strongly sprayed in the form of a high-pressure water stream from the lower nozzle (160), the middle nozzle (162), or the upper nozzle (161) to generate a vortex, or external air may be supplied to generate aeration. As another example, when an aerator (240) is installed at the bottom of the housing (110), aeration may be generated from the aerator (240), and only a high-pressure water stream may be sprayed from the lower nozzle (160), the middle nozzle (162), and the upper nozzle (161) to generate a vortex or whirlpool. That is, the polling (140) can be washed by the washing mixture (W) sprayed at high pressure from the lower nozzle (160) and the middle nozzle (162) located at the lower and upper sides of the polling (140). At this time, the stirring operation of each individual piece of the polling (140) can be continuously performed by the stirrer (250) that is being performed in the washing process (S20).

Additionally, the demister (150) can be cleaned by a cleaning mixture (W) sprayed at high pressure from an upper nozzle (161) located on the upper side of the demister (150) or inserted laterally into the demister (161).

In this way, the cleaning mixture (W) is sprayed through the lower nozzle (160), the middle nozzle (162), or the upper nozzle (161) for a certain period of time, or aeration and vortex are generated so that the polling (140) and the demister (150) can be cleaned. At this time, the contaminants detached from the polling (140) and the demister (150) can float to the surface of the cleaning mixture (W) or sink to the bottom due to the aeration and vortex. Then, the contaminants are suspended by the aerator (240) or the stirring device (260), and can be smoothly recovered through the recovery line () and purified by the filter (230).

Next, the washing mixture (W) is circulated and purified (S23). This circulation and purification process (S23) may be performed after the washing process (S20) described above, or after process (S21) and process (S22).

In this process (S23), the recovery line (220) is opened, and the cleaning mixture (W) together with contaminants can be recovered through the recovery line (220). The recovered cleaning mixture (W) passes through the filter (230) to filter out contaminants, and the purified cleaning mixture (W) can be supplied to the lower nozzle (160), the middle nozzle (162), and/or the upper nozzle (161) through the nozzle line (180). Here, the cleaning mixture (W) can be stirred by a stirring device (260) installed inside the housing (110) so that the contaminants included in the cleaning mixture (W) float. Through this stirring, the contaminants that have settled on the bottom can float and flow into the recovery line (220).

Finally, the cleaning mixture (W) is discharged (S24). When the cleaning of the polling (140) and the demister (150) is completed by the cleaning mixture (W), the circulation and purification of the cleaning mixture (W) are stopped, and the spraying of the cleaning mixture (W) from the lower nozzle (160), the middle nozzle (162), and the upper nozzle (161) can be stopped. Then, the cleaning mixture (W) filled in the housing (110) can be discharged below or completely through the cleaning mixture drain line (190) to the lower water level sensor (S). The cleaning mixture (W) discharged at this time can be purified separately and reused.

As described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential characteristics thereof. Therefore, it should be understood that the above-described embodiments are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the patent registration claims described below rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the patent registration claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

100:Gas purification module
110:Housing 120:Gas supply line
130: Gas drain line 140: Poling
150: Demister 160: Lower nozzle
161:Upper nozzle 162:Middle nozzle
170: Washing mixture supply line 171: Heater
180:Nozzle line
190: Washing mixture drain line.
200:Washing module
210: Upper water level sensor 220: Recovery line
230:Filter 240:Aerator
250: Stirrer 251: Rotating shaft
252: Stirrer blade 253: Rotating plate
254: Stirrer 260: Stirrer.
P: Pump S: Lower water level sensor
W: Cleaning mixture.

Claims (13)

Housing (110),
A gas supply line (120) installed to supply exhaust gas to the interior of the above housing (110);
Polling (140) and demister (150) installed so that the above exhaust gas passes through sequentially as it rises;
A gas discharge line (130) installed to discharge purified gas passing through the above polling (140) and demister (150);
A lower nozzle (160) positioned on the lower side of the above-mentioned polling (140) and installed to spray or inject a cleaning mixture (W);
A nozzle line (180) connected to supply a washing mixture (W) to the lower nozzle (160);
A cleaning mixture supply line (170) installed to supply a cleaning mixture (W) to the above nozzle line (180);
A washing mixture drain line (190) installed to discharge the washing mixture (W) collected in the above housing (110); and
At least one pump (P) installed to supply the washing mixture (W) to the washing mixture supply line (170), the washing mixture drain line (190) and the nozzle line (180);
In the gas purification mode, exhaust gas is supplied to the housing (110) through the gas supply line (120), purified through the polling (140) and demister (150), and then discharged through the gas discharge line (130).
A wet scrubber having a cleaning mode in which the gas supply line (120) is closed and a cleaning mixture (W) is sprayed at high pressure through a lower nozzle (160) to clean the polling (140).
In claim 1,
A wet scrubber having a cleaning mode in which a cleaning mixture (W) is sprayed from a lower nozzle (160) in the above gas cleaning mode to partially clean pollutants in exhaust gas.
In claim 1,
A wet scrubber having a cleaning mode in which a cleaning mixture supply line (170) and a gas supply line (120) are installed in close proximity or in contact with each other by a certain length so that heat exchange occurs between the cleaning mixture (W) and high-temperature exhaust gas to heat the cleaning mixture (W), or a heater (171) is installed in the cleaning mixture supply line (170) or the nozzle line (180).
In claim 1,
An upper nozzle (160) installed to wash the demister (150) by spraying a cleaning mixture (W) at high pressure, which is arranged on the upper or lower side of the demister (150) or interposed between demisters (150) manufactured in multiple stages;
An intermediate nozzle (162) positioned above the above-mentioned polling (140) and installed to spray a cleaning mixture (W) downward to clean the polling (140);
A recovery line (220) installed to recover the washing mixture (W) collected at the bottom of the housing (110) and supply it to the nozzle line (180);
A filter (230) installed in the above recovery line (220) to purify the washing mixture (W); and
A stirrer (250) inserted and installed inside the above-mentioned polling (140) and installed to stir individual products; and
A wet scrubber having a washing mode further comprising at least one of: a stirring device (260) for stirring the washing mixture (W) so that contaminants in the washing mixture (W) float and flow into the recovery line (220);
In claim 4,
The above-mentioned stirrer (250) has a rotating shaft (251) that rotates in place by external power, and a plurality of stirring blades (252) that are attached to the rotating shaft (251) and rotate vertically laterally, or
A wet scrubber having a cleaning mode, comprising a rotating plate (253) that is positioned in the middle of a side-view polling (140) and rotates horizontally, and a plurality of stirring protrusions (254) attached to the upper or lower surface of the rotating plate (253).
In claim 4,
In the above washing mode, the washing mixture (W) is filled inside the housing (110) so that it is submerged up to the polling (140) or demister (150) inside the housing (110).
The above lower nozzle (160) is a wet scrubber equipped with a cleaning mode in which the cleaning mixture (W) is sprayed in the form of a mist in the gas purification mode, the cleaning mixture (W) is sprayed at high pressure in the cleaning mode to generate a vortex, or external air is supplied to generate aeration.
In claim 6,
An upper water level sensor (210) installed on the upper side of the polling (140) or on the upper side of the demister (150) to detect the water level of the above-mentioned washing mixture (W); and
A wet scrubber having a washing mode in which at least one of an aerator (240) installed on the bottom of the housing (110) to generate aeration when the above washing mixture (W) is filled is further installed.
In claim 1,
A wet scrubber having a washing mode, characterized in that the above washing mixture (W) contains water, shell powder, baking soda and sodium percarbonate.
In the scrubber,
The gas purification mode, which purifies exhaust gas, and the cleaning mode, which cleans the polluted polling (140) and demister (150) while purifying gas, operate in a certain sequence.
The above gas purification mode is,
A 10th process (S10) in which gas is supplied to the lower part of the housing (110) through a gas supply line (120);
The 12th process (S12) in which the above gas is purified by passing through the polling (140) and the demister (150) in sequence;
Including the 13th process (S13) in which purified gas is discharged outside the housing (110);
The above washing mode is,
A method for cleaning a wet scrubber having a cleaning mode, characterized by including a 20th process (S20) in which a cleaning mixture (W) is sprayed upward at high pressure from a lower nozzle (160) installed on the lower side of a polling (140) to clean the polling (140).
In claim 9,
A method for cleaning a wet scrubber having a cleaning mode, characterized in that it further includes an eleventh process (S11) of spraying a cleaning mixture (W) in the form of mist through a lower nozzle (160) installed on the lower side of a poling (140) inside a housing (110) into which gas is introduced between the tenth process (S10) and the twelfth process (S12).
In claim 9,
After the above 20th process (S20),
The 23rd process (S23) in which the washing mixture (W) collected in the housing (110) is recovered through the recovery line (220) and purified by the filter (230) and supplied to the lower nozzle (160);
A method for cleaning a wet scrubber, characterized in that it further includes a 24th step (S24) in which a cleaning mixture (W) is discharged when the cleaning of the above polling (140) and demister (150) is completed.
In claim 11,
The above washing mode is
A process in which a cleaning mixture (W) is sprayed at high pressure from a middle nozzle (162) installed on the upper side of the above-mentioned polling (140) to clean the polling (140).
A process in which a cleaning mixture (W) is sprayed at high pressure from an upper nozzle (161) positioned above or below the demister (150) or interposed between demisters (150) manufactured in multiple stages, thereby cleaning the demister (150).
A process in which individual products are stirred by the operation of a rotating shaft (251) inside the above-mentioned poling (140), a plurality of stirring blades (252) protruding from the rotating shaft (251) and rotating vertically laterally, or a rotating plate (253) rotating horizontally laterally, and a plurality of stirring protrusions (254) attached to the upper and lower surfaces of the rotating plate (253).
A process in which the washing mixture (W) supplied through the lower nozzle (160) is heated by being close to the high-temperature exhaust gas flowing through the gas supply line (120) and is heated by a heater (171),
A method for cleaning a wet scrubber having a cleaning mode, characterized in that at least one process among the processes of stirring the cleaning mixture (W) so that pollutants contained in the cleaning mixture (W) float and flow into the recovery line (220) is further performed.
In claim 11,
The above washing mode is,
Between the 20th process (S20) and the 23rd process (S23),
A 21st process (S21) in which a cleaning mixture (W) is filled inside the housing (110) so that the polling (140) or demister (150) is submerged;
The method further includes a 22nd process (S22) in which aeration is generated in an aerator (240) disposed inside the housing (110), and a cleaning mixture (W) is sprayed at high pressure from a lower nozzle (160) on the lower side of the polling (140) or an upper middle nozzle (162) or an upper nozzle (161) interposed between the upper or lower side of the demister (140) or a multi-stage demister (140) to generate a vortex, or air is ejected from the lower nozzle (160), the middle nozzle (162), or the upper nozzle (161) to generate aeration, thereby cleaning the polling (140) and the demister (150).
The above 21st process (S21) to 24th process (S24) are performed with or without the 20th process (S20).
A method for cleaning a wet scrubber having a cleaning mode, characterized in that the above processes (S20 to S24) are performed sequentially or at least two processes are performed in an overlapping manner.

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