KR102700246B1 - Decreasing indoor bad smell apparatus for food waste dry equipments - Google Patents

Abstract

The present invention relates to an indoor odor treatment facility for a food waste drying facility, which can improve the environment within a factory and resolve complaints from surrounding areas by removing the odor generated within the factory during operation of the food waste drying facility and then releasing the odor into the atmosphere.
The present invention implements a novel indoor odor treatment facility that efficiently and completely removes odorous gases generated in the process of drying food waste by using a combination of arrangements of an activated carbon treatment tower, a chemical solution treatment tower, a wet treatment tower, and a condenser, thereby improving the work efficiency of workers by improving indoor odor, and providing an indoor odor treatment facility for a food waste drying facility that can actively deal with civil complaints caused by odor as well as extending the lifespan and improving the operating rate of mechanical equipment within a factory.

Description

{DECREASING INDOOR BAD SMELL APPARATUS FOR FOOD WASTE DRY EQUIPMENTS}

The present invention relates to an indoor odor treatment facility for a food waste drying facility, and more specifically, to an indoor odor treatment facility for a food waste drying facility which can improve the environment within a factory and resolve complaints from neighbors by removing odors generated within the factory during operation of the food waste drying facility and then releasing the odors into the atmosphere.

Recently, due to industrial development and population growth, the amount of waste generated is increasing day by day. Such waste causes environmental pollution and the useful resources contained in it are sometimes discarded, so it is important to efficiently process and recover them.

Generally, waste can be classified into organic waste and inorganic waste based on the properties of the materials it composes. Among them, organic waste can be defined as waste of plant or animal origin with an organic content of 40% or more.

The types and sources of waste included in this category of organic waste are diverse. For example, food waste, sludge from sewage treatment plants, livestock manure, animal carcasses, waste from fishery processing plants, waste from agricultural and livestock processing plants, offal from food and paper factories, and slaughterhouse waste are all examples of organic waste.

This increase in organic waste is emerging as the biggest cause of environmental and water pollution.

Accordingly, recently, a drying method for drying organic wastes such as food waste and utilizing them as renewable energy resources has been attracting attention, and by drying organic wastes in this way to reduce the moisture content, an excellent solid fuel with a calorific value of 3,000 to 4,000 kcal/kg or more can be obtained.

Common facilities for drying waste include direct and indirect drying facilities that use hot air and steam.

However, in order to remove moisture evaporated during the drying process, air flow is essential, and as a result, high-concentration condensate gas containing a large amount of moisture and oil, i.e. high-concentration foul-smelling gas, is inevitably generated during the drying process, which not only impedes the working environment inside the factory but also causes air pollution.

Considering these points, methods for removing odor components emitted to the outside during the drying process include installing separate odor reduction equipment such as a deodorizing incinerator boiler, wet cleaning tower, activated carbon adsorption tower, and biofilter device, and capturing odorous gas emitted from the dryer, removing odor components, and then releasing it into the atmosphere.

However, since the exhaust gas emitted from the odor reduction facility is of high temperature, if the exhaust gas is continuously discharged to the outside and heated, energy is continuously wasted to the outside, so there are disadvantages in terms of economy, such as requiring a lot of energy, and even if the odor reduction facility is operated, it is still difficult to completely remove the odor generated during the drying process.

Publication of Patent Publication No. 10-2022-0161814 Publication of Patent Publication No. 10-2021-0064882 Publication of Patent Publication No. 10-2001-0091115 Publication of Patent Publication No. 10-2003-0009689

Accordingly, the present invention has been conceived in consideration of the above points, and by implementing a novel indoor odor treatment facility that efficiently and completely removes odorous gases generated during the drying process of food waste by using a combination of an activated carbon treatment tower, a liquid cleaning tower, a wet cleaning tower, and a condenser, the work efficiency of workers can be improved by improving indoor odor, and the lifespan and operating rate of mechanical equipment within a factory can be extended, and the purpose of the present invention is to provide an indoor odor treatment facility for a food waste drying facility that can actively deal with civil complaints caused by odor.

In order to achieve the above purpose, the indoor odor treatment facility of the sound waste drying facility provided in the present invention has the following characteristics.

The indoor odor treatment facility of the above-mentioned food waste drying facility is characterized by including a pre-filter for removing foreign substances contained in odorous gas inside the factory, an activated carbon treatment tower for removing odorous gas discharged from the pre-filter with activated carbon, a chemical solution cleaning tower for removing odorous gas discharged from the activated carbon treatment tower with a chemical solution, a primary condenser for removing odorous gas discharged from the chemical solution cleaning tower by condensation using cooling water, a wet cleaning tower for removing odorous gas discharged from the primary condenser by wet method, a secondary condenser for removing odorous gas discharged from the wet cleaning tower by condensation using cooling water, a stack for discharging treated gas discharged from the secondary condenser into the atmosphere, and a cooling water circulation device for providing cooling water that circulates through the primary condenser and the secondary condenser.

The chemical solution washing tower of the indoor malodor treatment facility of such a waste drying facility is composed of three washing towers that are sequentially arranged in a linked manner, and may include a first chemical solution washing tower that uses sulfuric acid as a chemical solution to treat acid malodorous components, a second chemical solution washing tower that uses caustic soda as a chemical solution to treat aldehyde malodorous components, and a third chemical solution washing tower that uses sodium hypochlorite as a chemical solution to treat malodorous components such as aldehyde.

As a preferred embodiment, the first chemical solution washing tower may include a sulfuric acid storage tank equipped with a pH controller and filled with sulfuric acid, a sulfuric acid mixture circulating water storage tank for mixing sulfuric acid supplied from the sulfuric acid storage tank with feed water and internal circulation water supplied as replenishment water from a circulation tank and then supplying the mixture to the washing tower, and a multi-stage nozzle pipe and pump for spraying the sulfuric acid mixture supplied from the sulfuric acid mixture circulating water storage tank into the inside of the washing tower.

As a preferred embodiment, the secondary chemical solution washing tower may include a caustic soda storage tank equipped with a pH controller and filled with caustic soda, a caustic soda mixture circulating water storage tank for mixing caustic soda supplied from the caustic soda storage tank with feed water supplied as replenishment water to a circulation tank and internal circulating water and then supplying the same to the washing tower, and a multi-stage nozzle pipe and pump for spraying the caustic soda mixture supplied from the caustic soda mixture circulating water storage tank into the inside of the washing tower.

As a preferred embodiment, the third chemical solution washing tower may include a sodium hypochlorite storage tank filled with sodium hypochlorite, a sodium hypochlorite mixture circulating water storage tank for mixing sodium hypochlorite supplied from the sodium hypochlorite storage tank by a quantitative pump with feed water supplied as replenishment water from a circulation tank and internal circulation water and then supplying the mixture to the washing tower, and a multi-stage nozzle pipe and pump for spraying the sodium hypochlorite mixture supplied from the sodium hypochlorite mixture circulating water storage tank into the inside of the washing tower.

As a preferred embodiment, the wet scrubber may include a feedwater mixing tank for mixing feedwater supplied as circulation tank replenishment water and internal circulation water and then supplying them to the scrubber, and a multi-stage nozzle pipe and pump for spraying feedwater supplied from the feedwater storage tank into the interior of the scrubber.

Here, the wet scrubbing tower may further include an ozone pipe and an ozone generator connected to the multi-stage nozzle pipe side as a means for decomposing, purifying, deodorizing and sterilizing malodorous gas by supplying ozone water (OH radicals) to the discharge line of the circulation water supply pump.

In addition, the indoor odor treatment facility of the above-mentioned sound waste drying facility may further include a cooling water circulation device, which is a means for providing cooling water to the primary condenser and the secondary condenser, and which comprises a circulation water tank for storing the circulating water discharged from the condenser, a chiller device for cooling the circulating water in the circulation water tank, and a circulation water pump for forcibly circulating the circulating water in the circulation water tank and supplying it to the chiller device side, i.e., the condenser side, through the chiller device.

The indoor odor treatment facility of the sound waste drying facility provided by the present invention has the following effects.

First, it has the effect of improving the work efficiency of workers and increasing productivity by improving the odor inside the factory and creating a pleasant work environment.

Second, by purifying the air inside the factory, it is possible to extend the life of mechanical equipment and increase the equipment operating rate.

Third, it has the effect of reducing complaints about bad odors by releasing purified air with no bad odors into the atmosphere.

Figure 1 is a schematic diagram showing an indoor odor treatment facility of a sound waste drying facility according to one embodiment of the present invention.
Figure 2 is a schematic diagram showing the state of use of an indoor odor treatment facility of a sound waste drying facility according to one embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a schematic diagram showing an indoor odor treatment facility of a sound waste drying facility according to one embodiment of the present invention.

As shown in Fig. 1, the indoor odor treatment facility of the above-mentioned sound waste drying facility includes a pre-filter unit (10) as a means of removing foreign substances contained in the odorous gas inside the factory.

The above pre-filter unit (10) is a structure in which a filter (19) such as non-woven fabric is installed inside a case having an inlet and an outlet. The inlet is connected to the inside of the factory, while the outlet is connected to an activated carbon treatment tower (11) through a pipe.

This pre-filter unit (10) functions to filter the foul-smelling gas inside the factory that enters through the inlet when the fan (37) is in operation using the filter (19) and then discharge it through the outlet.

In this process of the foul-smelling gas passing through the pre-filter unit (10), foreign substances such as dust contained in the foul-smelling gas are removed, and the foul-smelling gas with the foreign substances removed is discharged through the outlet and then sent to the activated carbon treatment tower (11) through the pipe.

In addition, the indoor odor treatment facility of the above-mentioned sound waste drying facility includes an activated carbon treatment tower (11) as a means of removing odorous gas discharged from the pre-filter unit (10) with activated carbon (20).

The above activated carbon treatment tower (11) is a structure in which multi-stage activated carbon (20) is installed inside a treatment tower having an inlet and an outlet. At this time, the treatment tower inlet is connected to the outlet of the pre-filter unit (10) by a pipe, and at the same time, the treatment tower outlet is connected to the inlet of the chemical solution washing tower, i.e., the first chemical solution washing tower (12), by a pipe.

This activated carbon treatment tower (11) functions to filter the malodorous gas that enters through the inlet when the fan (37) is in operation, that is, the malodorous gas that has been purified by removing foreign substances, through activated carbon (20), and then to remove the malodorous components and then to discharge the gas through the outlet.

In this process of the malodorous gas passing through the activated carbon (20), the malodorous components contained in the malodorous gas are adsorbed and removed by the multi-stage activated carbon (20), and the malodorous gas from which the malodorous components have been removed for the first time is discharged through the outlet and then sent to the first chemical liquid cleaning tower (12) of the chemical liquid cleaning tower through the pipe.

In addition, the indoor odor treatment facility of the above-mentioned waste drying facility includes a chemical solution cleaning tower as a means of removing odorous gas discharged from the activated carbon treatment tower (11) with a chemical solution.

These chemical liquid cleaning towers are composed of three cleaning towers that are sequentially arranged in a linked manner, namely, the first chemical liquid cleaning tower (12), the second chemical liquid cleaning tower (13), and the third chemical liquid cleaning tower (14). Since the malodorous gas passes through the three cleaning towers, each of which sprays a chemical liquid of a different component, the malodorous components of the malodorous gas can be effectively removed.

To this end, the first chemical solution washing tower (12) is a washing tower that uses sulfuric acid or hydrochloric acid as a chemical solution to treat alkaline odor components, and is configured with a structure in which a multi-stage nozzle pipe (23) having a three-stage structure is installed inside the washing tower having an inlet at the lower end and an outlet at the upper end, and at this time, the washing tower inlet is connected to the outlet of the activated carbon treatment tower (11) by pipes, and at the same time, the washing tower outlet is connected to the inlet of the second chemical solution washing tower (13) by pipes.

This primary chemical solution washing tower (12) includes a sulfuric acid storage tank (21) filled with a certain amount of sulfuric acid, a sulfuric acid mixture circulation water storage tank (22) which is installed at the lower side of the primary chemical solution washing tower (12) and communicates with the lower area inside the washing tower while being connected to the sulfuric acid storage tank (21) side by a pipe, and which mixes sulfuric acid supplied from the sulfuric acid storage tank (21) with feed water supplied as make-up water for the circulation tank and internal circulation water and then supplies the mixture to the washing tower, and a multi-stage nozzle pipe (23) and a pump (24a) which pump the sulfuric acid mixture supplied from the sulfuric acid mixture circulation water storage tank (22), that is, the sulfuric acid mixture filled to a certain level in the lower area inside the primary chemical solution washing tower (12), and sprays it inside the washing tower.

Here, the multi-stage nozzle pipe (23) can be configured as a three-stage structure having a plurality of nozzles for spraying the liquid and arranged in a vertical parallel manner inside the cleaning tower.

In addition, the first liquid cleaning tower (12) is equipped with a pH controller (38), and the amount of sulfuric acid input is controlled according to the pH setting range by the pH controller (38), and the proper acid concentration of the sulfuric acid circulating water mixture filled in the sulfuric acid circulating water storage tank (22) can be controlled to an appropriate pH by automatically controlling the amount of sulfuric acid input.

Accordingly, when the pump installed in the pipe between the sulfuric acid storage tank (21) and the sulfuric acid mixture circulating water storage tank (22) is operated, the sulfuric acid filled in the sulfuric acid storage tank (21) is supplied to the sulfuric acid mixture circulating water storage tank (22) along the pipe, and at the same time, externally provided water is supplied as supplementary water to the sulfuric acid mixture circulating water storage tank (22), and continuously, when the pump (24a) connected to the lower side of the primary chemical solution washing tower (12) is operated, the sulfuric acid circulating water mixture filled in the lower internal area of the primary chemical solution washing tower (12) is sprayed into the internal space of the primary chemical solution washing tower (12) through the multi-stage nozzle pipe (23), and eventually, the malodorous gas that enters through the washing tower inlet, passes through the inside of the washing tower, and exits through the washing tower outlet comes into contact with the sulfuric acid mixture, so that alkaline malodorous substances such as ammonia and trimethylamine in the malodorous gas can be removed.

The above-mentioned second chemical solution washing tower (13) is a washing tower that uses caustic soda or the like as a chemical solution to treat the odor components of hydrogen sulfide and other odorous substances, and is configured with a structure in which a multi-stage nozzle pipe (27) having a three-stage structure is installed inside the washing tower having an inlet at the lower end and an outlet at the upper end, and at this time, the washing tower inlet is connected to the outlet of the first chemical solution washing tower (12) by a pipe, and at the same time, the washing tower outlet is connected to the inlet of the third chemical solution washing tower (14) by a pipe.

This secondary chemical solution washing tower (13) includes a caustic soda storage tank (25) filled with a certain amount of caustic soda, a caustic soda mixture circulation water storage tank (26) which is installed at the lower side of the secondary chemical solution washing tower (13) and communicates with the lower area inside the washing tower while being connected to the caustic soda storage tank (25) side by a pipe, and which mixes caustic soda supplied from the caustic soda storage tank (25) with feed water supplied as replenishment water for the circulation tank and internal circulation water and then supplies the mixture to the washing tower, and a multi-stage nozzle pipe (27) and a pump (24b) which pump the caustic soda circulation water mixture supplied from the caustic soda mixture circulation water storage tank (26), i.e., the caustic soda mixture filled to a certain level in the lower area inside the secondary chemical solution washing tower (13), and sprays it inside the washing tower.

Here, the multi-stage nozzle pipe (27) can be configured as a three-stage structure having a plurality of nozzles for spraying the liquid and arranged in a vertical parallel manner inside the cleaning tower.

In addition, the second chemical solution washing tower (13) is equipped with a pH controller (38), and the amount of caustic soda injected is controlled according to the pH setting range by the pH controller (38), and the appropriate alkaline maintenance concentration of the caustic soda circulating water mixture filled in the caustic soda circulating water storage tank (26) can be controlled to an appropriate pH by automatically controlling the amount of caustic soda injected.

Accordingly, when the pump installed in the pipe between the caustic soda storage tank (25) and the caustic soda mixture circulation water storage tank (26) is operated, the caustic soda filled in the caustic soda storage tank (25) is supplied to the caustic soda mixture circulation water storage tank (26) along the pipe, and at the same time, externally supplied water is supplied as supplementary water to the caustic soda mixture circulation water storage tank (26), and continuously, when the pump (24b) connected to the lower side of the secondary chemical solution washing tower (13) is operated, the caustic soda circulation water mixture filled in the lower inner area of the secondary chemical solution washing tower (13) is sprayed into the inner space of the secondary chemical solution washing tower (13) through the multi-stage nozzle pipe (27), and eventually, the malodorous gas that enters through the washing tower inlet, passes through the inside of the washing tower, and exits through the washing tower outlet comes into contact with the caustic soda mixture, so that acidic malodorous substances such as hydrogen sulfide in the malodorous gas are It can be removed.

The above-mentioned third chemical solution washing tower (14) is a washing tower that uses sodium hypochlorite or the like as a chemical solution to treat odorous components such as aldehydes, and is configured with a structure in which a multi-stage nozzle pipe (30) having a three-stage structure is installed inside the washing tower having an inlet at the lower end and an outlet at the upper end, and at this time, the washing tower inlet is connected to the outlet of the second chemical solution washing tower (12) by a pipe, and at the same time, the washing tower outlet is connected to the suction side of the fan (37) by a pipe.

At this time, the fan (37) is a means for exerting suction force for the flow of odorous gas, and the suction side and discharge side of the fan (37) are connected to the outlet of the 3rd liquid cleaning tower (14) and the inlet of the 1st condenser (15) by pipes, respectively.

This third chemical solution washing tower (14) includes a sodium hypochlorite storage tank (28) filled with a certain amount of sodium hypochlorite, a structure that is installed at the lower side of the third chemical solution washing tower (14) and communicates with the lower area inside the washing tower while being connected to the sodium hypochlorite storage tank (28) side by a pipe, a sodium hypochlorite mixture circulation water storage tank (29) that mixes sodium hypochlorite supplied from the sodium hypochlorite storage tank (28) with feed water supplied as replenishment water for the circulation tank and internal circulation water and then supplies it to the washing tower, and a multi-stage nozzle pipe (30) and a pump (24c) that pumps the sodium hypochlorite circulation water mixture supplied from the sodium hypochlorite mixture circulation water storage tank (29), that is, the sodium hypochlorite mixture filled to a certain level in the lower area inside the third chemical solution washing tower (14), and sprays it inside the washing tower.

Here, the multi-stage nozzle pipe (30) can be configured as a three-stage structure having a plurality of nozzles for spraying the liquid and arranged in a vertical parallel manner inside the cleaning tower.

Accordingly, when the pump installed in the pipe between the sodium hypochlorite storage tank (28) and the sodium hypochlorite mixture circulating water storage tank (29) is operated, the sodium hypochlorite filled in the sodium hypochlorite storage tank (28) is supplied to the sodium hypochlorite mixture circulating water storage tank (29) along the pipe, and at the same time, externally supplied water is supplied as supplementary water to the sodium hypochlorite mixture circulating water storage tank (29), and continuously, when the pump (24c) connected to the lower side of the third chemical solution washing tower (14) is operated, the sodium hypochlorite circulating water mixture filled in the lower inner area of the third chemical solution washing tower (14) is sprayed into the inner space of the third chemical solution washing tower (14) through the multi-stage nozzle pipe (30), and eventually, the odorous gas that enters through the washing tower inlet, passes through the inside of the washing tower, and exits through the washing tower outlet comes into contact with the sodium hypochlorite mixture. As a result, odorous substances such as aldehydes in odorous gases can be removed.

In addition, the indoor odor treatment facility of the above-mentioned waste drying facility includes a primary condenser (15) as a means of removing the odorous gas discharged from the third chemical solution washing tower (14) by condensing it with cooling water.

The above primary condenser (15) plays a role in reducing the odor components of the odorous gas by primary condensation removal after the odorous gas has been treated to remove odorous substances such as acidic and alkaline odorous substances and aldehydes up to the 3rd liquid cleaning tower (14).

In this primary condenser (15), the malodorous gas is cooled by cooling water flowing inside to remove the malodorous components, thereby converting it into a treated gas with most of the malodorous components removed, which can then be sent to a wet scrubbing tower (16).

To this end, the primary condenser (15) includes a cooling water inlet and a cooling water outlet on the side for the introduction and discharge of circulating cooling water, as well as an upper odor gas inlet connected to the discharge side of the fan (37) on the side of the third liquid cleaning tower (14), and a lower odor gas outlet connected to the side of the wet cleaning tower (16).

And, the interior of the primary condenser (15) is composed of upper and lower gas spaces and a middle cooling water space, and at this time, the gas space and the cooling water space are isolated from each other, and a number of pipes are connected and installed between the upper and lower gas spaces and crossing the cooling water space.

Here, the upper gas space portion is communicated with the odor gas inlet, while the lower gas space portion is communicated with the odor gas outlet, and the middle cooling water space portion is communicated with the upper and lower cooling water outlets and cooling water inlets.

Accordingly, the malodorous gas discharged after acidic malodorous substances such as aldehydes are treated in the third liquid cleaning tower (14) enters the first condenser (15), and the malodorous gas entering in this manner flows from the upper gas space to the lower gas space through the pipe, while the cooling water entering through the cooling water inlet passes through the cooling water space inside the first condenser (15), i.e., the cooling water space including a number of pipes, and then exits through the cooling water outlet. As a result, the cooling water flowing through the cooling water space undergoes a heat exchange with the malodorous gas flowing inside the pipes, so that the malodorous components in the malodorous gas are condensed and removed as condensed wastewater.

In addition, the indoor odor treatment facility of the above-mentioned waste drying facility includes a wet cleaning tower (16) as a means for wetly removing odorous gas discharged from the primary condenser (15).

The above wet scrubbing tower (16) is a scrubbing tower that uses a mixture of water and ozone, i.e., ozone water, to decompose, purify and sterilize odor components. It is structured to have a multi-stage nozzle pipe (32) installed in a three-stage structure inside the scrubbing tower, which has an inlet at the lower end and an outlet at the upper end. At this time, the scrubbing tower inlet is connected to the outlet of the primary condenser (15) by pipes, and at the same time, the scrubbing tower outlet is connected to the inlet of the secondary condenser (17) by pipes.

This wet scrubbing tower (16) includes a feedwater storage tank (33) that stores feedwater at a certain water level, and a multi-stage nozzle pipe (32) and a pump (24d) that pump the feedwater supplied from the feedwater storage tank (33), i.e., the feedwater filled at a certain water level in the lower area inside the wet scrubbing tower (16), and spray it inside the scrubbing tower.

Here, the multi-stage nozzle pipe (32) can be configured as a three-stage structure having a plurality of nozzles for water injection and arranged in a vertically parallel manner inside the cleaning tower.

Accordingly, the feed water storage tank (33) is filled with feed water supplied from the circulation water tank (36) to maintain a constant water level, and when the pump (24d) connected to the lower side of the wet scrubbing tower (16) is operated, the feed water filled in the lower area inside the wet scrubbing tower (16) meets the ozone supplied through the pump discharge pipe to create ozone water of OH- radicals, which is then sprayed into the internal space of the wet scrubbing tower (16) through the multi-stage nozzle pipe (32), and eventually, the malodorous gas that enters through the scrubbing tower inlet, passes through the inside of the scrubbing tower, and exits through the scrubbing tower outlet comes into contact with the sterilizing water, so that the malodorous components of the malodorous gas can be decomposed, purified, and sterilized.

In particular, the wet cleaning tower (16) includes an ozone generator (31) as a means of supplying ozone to the inside of the cleaning tower to decompose, purify, and sterilize odorous gas.

The ozone supply pipe extending from the above ozone generator (31) is connected to the multi-stage nozzle pipe (32), and a venturi tube is installed at the connection point between the ozone supply pipe and the multi-stage nozzle pipe (32) to ensure good ozone water formation.

Accordingly, the ozone generated when the ozone generator (31) is in operation is naturally mixed with the feed water supplied through the multi-stage nozzle pipe (32) in the venturi tube, and the mixed feed water becomes ozone water (OH- radical) and is sprayed inside the wet cleaning tower (16), and eventually, the malodorous gas that comes into contact with the ozone water is rapidly decomposed, purified, and sterilized, so that the malodorous substances can be completely removed.

Here, in the case of the above ozone water, after a certain period of time, it is converted back into water, completely eliminating the problem of secondary pollution.

In addition, the indoor odor treatment facility of the above-mentioned waste drying facility includes a secondary condenser (17) as a means of removing the odorous gas discharged from the wet cleaning tower (16) by condensing it with cooling water.

The above secondary condenser (17) plays a role in completely removing the odorous components of the odorous gas discharged from the wet scrubber (16).

In this secondary condenser (17), the malodorous gas is cooled by cooling water flowing inside to remove the malodorous component, thereby converting it into a treated gas with the malodorous component completely removed, and sending it to the stack (18).

To this end, the secondary condenser (17) includes a cooling water inlet and cooling water outlet on the side for the introduction and discharge of circulating cooling water, as well as an upper odor gas inlet connected to the outlet of the wet scrubber (16) and a lower odor gas outlet connected to the stack (18).

And, the interior of the secondary condenser (17) is composed of upper and lower gas spaces and a middle cooling water space, and at this time, the gas space and the cooling water space are isolated from each other, and a number of pipes that cross the cooling water space are connected and installed between the upper and lower gas spaces.

Here, the upper gas space portion is communicated with the odor gas inlet, while the lower gas space portion is communicated with the odor gas outlet, and the middle cooling water space portion is communicated with the upper and lower cooling water outlets and cooling water inlets.

Accordingly, the malodorous gas discharged after most of the malodorous components have been processed in the wet scrubber (16) enters the interior of the secondary condenser (17), and the malodorous gas entering in this manner flows from the upper gas space to the lower gas space through the pipe, while the cooling water entering through the cooling water inlet passes through the cooling water space inside the secondary condenser (17), i.e., the cooling water space including a number of pipes, and then exits through the cooling water outlet. As a result, the cooling water flowing through the cooling water space undergoes a heat exchange with the malodorous gas flowing inside the pipes, so that the malodorous components in the malodorous gas are condensed and removed as condensed wastewater.

In addition, the indoor odor treatment facility of the above-mentioned sound waste drying facility includes a cooling water circulation device as a means of providing cooling water to the primary condenser (15) and secondary condenser (17).

The above cooling water circulation device is composed of a circulation water tank (36) that stores the circulation water discharged from the primary and secondary condensers (15, 17), a chiller device (34) that cools the circulation water supplied to the primary and secondary condensers (15, 17), and a circulation pump (35) that forcibly circulates the cooling water in the circulation tank (36) and supplies it to the primary and secondary condensers (15, 17).

The above-mentioned circulation water tank (36) is a place to store the circulation water that has escaped from the primary and secondary condensers (15, 17) in order to supply cooling water that circulates inside the primary and secondary condensers (15, 17). In this place, not only the circulation water recovered through the chiller device (34) and the primary and secondary condensers (15, 17), but also reused water, city water, etc. can be stored.

This circulating water tank (36) is connected to the chiller device (34) side and the circulating pump (35) side through pipes so that cooling water can be supplied and recovered.

The chiller device (34) above serves to cool the circulating water coming out of the primary and secondary condensers (15, 17) and then supply it to the lower side of the primary condenser (15) and the secondary condenser (17). This chiller device (34) is connected to the primary and secondary condensers (15, 17) and the circulating tank (36) through pipes.

The above circulation water pump (35) is a means for supplying water stored in the circulation water tank (36) to the primary and secondary condensers (15, 17), and this circulation pump (35) is also connected to the circulation tank (36) and the primary and secondary condensers (15, 17) through pipes.

In addition, the indoor odor treatment facility of the above-mentioned waste drying facility includes a stack (18) as a means of releasing the purified gas discharged from the secondary condenser (17) into the atmosphere.

The above stack (18) is a kind of chimney, and its role is to release clean air, which has been treated with foreign substances and odorous substances by a liquid cleaning tower, a condenser, a wet cleaning tower, etc., into the atmosphere.

Figure 2 is a schematic diagram showing the usage status of an indoor odor treatment facility of a sound waste drying facility according to one embodiment of the present invention.

As illustrated in Figure 2, low-concentration odorous gases are generated indoors in the factory during the process of drying and treating food waste, and these odorous gases are removed by the indoor odor treatment facility and then released to the outside. Accordingly, not only is the indoor air quality of the factory improved, but the air quality around the factory is also improved, reducing complaints from surrounding residents due to odors.

First, when the fan (37) is operated and the foul-smelling gas inside the factory flows into the pre-filter section (10), foreign substances are removed and the foul-smelling components are first removed by the filter (19) made of non-woven fabric, Heka, etc.

Next, when the odorous gas discharged from the pre-filter unit (10) flows into the activated carbon treatment tower (11), the odorous components in the odorous gas are adsorbed and removed by the activated carbon (20).

Next, when the malodorous gas discharged from the activated carbon treatment tower (11) passes through the first chemical solution washing tower (12), the second chemical solution washing tower (13), and the third chemical solution washing tower (14) which are arranged sequentially, the alkaline malodorous substances and acidic malodorous substances in the malodorous gas are removed and processed by each chemical solution component.

Next, when the odorous gas discharged from the third liquid cleaning tower (14) flows into the first condenser (15), most of the odorous components in the odorous gas are removed through a condensation process resulting from heat exchange with the cooling water.

Next, when the odorous gas discharged from the primary condenser (15) flows into the wet cleaning tower (16), the odorous components are removed through wet treatment, and decomposition purification and sterilization treatment using ozone are performed.

Next, when the odorous gas discharged from the wet scrubbing tower (16) flows into the secondary condenser (17), the odorous components in the odorous gas are completely removed through a condensation process resulting from heat exchange with the cooling water, and then it exits the secondary condenser (17), and the treated gas discharged in this manner passes through the stack (18) and is released into the atmosphere.

By treating the malodorous gas in the factory by sequentially passing it through the pre-filter unit (10) → activated carbon treatment tower (11) → first chemical solution cleaning tower (12) → second chemical solution cleaning tower (13) → third chemical solution cleaning tower (14) → first condenser (15) → wet cleaning tower (16) → second condenser (17), the malodorous components in the malodorous gas are gradually reduced, thereby effectively resolving the problem of malodor generation inside the factory as well as malodorous complaints around the factory.

In this way, the present invention provides an indoor odor treatment facility that efficiently and completely removes odorous gases generated during the process of drying food waste by using a new arrangement combination of an activated carbon treatment tower, a liquid cleaning tower, a wet cleaning tower, and a condenser, thereby improving the work efficiency of workers by improving indoor odor, extending the lifespan and improving the operating rate of mechanical equipment within the factory, and resolving complaints about odors in the vicinity of the factory.

10: Pre-filter section
11: Activated carbon treatment tower
12: 1st liquid cleaning tower
13: Secondary liquid cleaning tower
14: 3rd liquid cleaning tower
15: Primary capacitor
16: Wet cleaning tower
17: Secondary capacitor
18 : Stack
19 : Filter
20 : Activated carbon
21: Sulfuric acid storage tank
22: Sulfuric acid mixture circulation water storage tank
23: Multi-stage nozzle piping
24a,24b,24c,24d : Pump
25: Caustic soda storage tank
26: Caustic soda mixture circulation water storage tank
27: Multi-stage nozzle piping
28: Sodium hypochlorite storage tank
29: Sodium hypochlorite mixed solution circulation water storage tank
30: Multi-stage nozzle piping
31: Ozone generator
32: Multi-stage nozzle piping
33 : Water storage tank
34: Chiller device
35 : Circulating water pump
36: Circulating water tank
37 : Fan
38 : pH regulator

Claims (8)

A pre-filter section that removes foreign substances contained in the foul-smelling gas inside the factory;
An activated carbon treatment tower that removes odorous gases emitted from the above pre-filter using activated carbon;
A chemical solution cleaning tower that removes foul-smelling gas discharged from the activated carbon treatment tower using a chemical solution;
A primary condenser that removes the foul-smelling gas discharged from the above-mentioned liquid cleaning tower by condensing it using cooling water;
A wet cleaning tower for removing odorous gases discharged from the above primary condenser in a wet manner;
A secondary condenser that removes the foul-smelling gas discharged from the above wet scrubber by condensing it using cooling water;
A stack that releases the treatment gas discharged from the secondary condenser into the atmosphere;
A cooling water circulation device that provides cooling water that circulates through the primary condenser and secondary condenser;
An indoor odor treatment facility for a food waste drying facility, characterized by including:
In claim 1,
The above-mentioned chemical solution washing tower is composed of three washing towers arranged in sequence, and includes a first chemical solution washing tower that uses sulfuric acid as a chemical solution to treat alkaline malodorous components, a second chemical solution washing tower that uses caustic soda as a chemical solution to treat acidic malodorous components, and a third chemical solution washing tower that uses sodium hypochlorite as a chemical solution to treat malodorous components such as aldehyde. The indoor malodor treatment facility of a food waste drying facility is characterized by this.
In claim 2,
An indoor odor treatment facility for a food waste drying facility, characterized in that the first liquid cleaning tower includes a sulfuric acid storage tank filled with sulfuric acid, a sulfuric acid mixture circulating water storage tank for mixing and storing sulfuric acid supplied from the sulfuric acid storage tank and supplementary water, and a multi-stage nozzle pipe and pump for spraying the sulfuric acid mixture supplied from the sulfuric acid mixture circulating water storage tank into the cleaning tower.
In claim 2,
An indoor odor treatment facility for a food waste drying facility, characterized in that the second liquid cleaning tower includes a caustic soda storage tank filled with caustic soda, a caustic soda mixture circulating water storage tank for mixing and storing caustic soda supplied from the caustic soda storage tank and supplementary water, and a multi-stage nozzle pipe and pump for spraying the caustic soda mixture supplied from the caustic soda mixture circulating water storage tank into the cleaning tower.
In claim 2,
The above-mentioned third-stage chemical solution washing tower comprises a sodium hypochlorite storage tank filled with sodium hypochlorite, a sodium hypochlorite mixed solution storage tank for mixing and storing sodium hypochlorite and feed water supplied from the sodium hypochlorite storage tank and then supplying them to the washing tower nozzle, and a multi-stage nozzle pipe and pump for spraying the sodium hypochlorite mixed solution supplied from the sodium hypochlorite mixed solution storage tank into the inside of the washing tower. The indoor odor treatment facility of a food waste drying facility is characterized by including:
In claim 1,
An indoor odor treatment facility for a food waste drying facility, characterized in that the wet scrubber comprises a feedwater storage tank that stores feedwater and then supplies it to the scrubber, and a multi-stage nozzle pipe and pump that spray the feedwater supplied from the feedwater storage tank into the interior of the scrubber.
In claim 1 or claim 6,
An indoor odor treatment facility for a food waste drying facility, characterized in that it further includes an ozone supply pipe and an ozone generator connected to a multi-stage nozzle pipe side as a means for decomposing, purifying and sterilizing odorous gas by supplying ozone to the inside of the above wet cleaning tower.
In claim 1,
An indoor odor treatment facility for a food waste drying facility, characterized in that it further includes a cooling water circulation device comprising a chiller device for re-cooling the circulating water discharged from the condenser as a means for supplying cooling water to the primary condenser and the secondary condenser, a circulating water tank for storing the cooling water supplied from the chiller device, and a circulating water pump for forcibly circulating the circulating water in the circulating water tank and supplying it to the chiller device side.

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