WO2020054885A1 - Condensed gas refining column of organic waste drying device - Google Patents

Abstract

The present invention relates to a condensed gas refining column of an organic waste drying device, which can reduce contamination of condensed wastewater to the largest extent by refining organic waste condensed gas discharged during an organic waste drying process. The present invention provides a condensed gas refining column of an organic waste drying system, wherein a preprocessing facility such as a condensed gas refining column is disposed on a line for discharging condensed gas generated in an organic waste drying process (that is, on a condensed gas discharge line) so as to implement a new type of condensed gas preprocessing system capable of completely removing high-concentration oil contained in the condensed gas, scattering thereof, or the like. Accordingly, outward discharge of odorous components generated in the drying process is completely blocked, thereby fundamentally solving the problem of atmospheric contamination. Particularly, oil inside condensed gas generated in the drying process and scattering thereof are removed to the largest extent, thereby reducing the degree of contamination inside the final condensed wastewater. As such, the system processing efficiency is improved, and the facility can also be operated economically.

Description

Condensation gas purification tower of organic waste dryer

The present invention relates to a condensation gas purification tower of an organic waste drying apparatus, and more specifically, condensation of an organic waste drying apparatus capable of reducing contamination of condensate waste water as much as possible by purifying organic waste condensation gas discharged during the organic waste drying process. It relates to a gas purification tower.

In recent years, the modern society of mass production and mass consumption has caused serious environmental pollution problems by mass disposal, and representative environmental pollution problems include soil and water pollution problems due to mass disposal and air pollution problems due to mass consumption of energy. There is this.

In relation to the soil and water pollution problem, it is not only a free position in the agricultural field, but as a result of intensive production as the efficiency of production is prioritized, the problem of soil and water pollution due to excessive dropping of pesticides and chemical fertilizers and improper management of livestock manure. Is caused.

In addition, in the case of incineration or drying of wastes in relation to the treatment of wastes, when direct flame or steam is applied to the wastes, it is completely due to various factors such as load, density, moisture content, incinerator size, and heating temperature. It is practically impossible to burn or completely dry, and there is a problem in that a large amount of odor, soot, dust, air pollution and exhaust gas due to incomplete combustion or drying occurs.

For example, organic wastes such as livestock manure, food waste, and wastewater sludge are disposed of by incineration, landfill, etc. after dehydration, and some are recycled, but most are discharged to the ocean.

However, in recent years, marine emissions have been banned to prevent marine pollution, and incineration requires enormous facility investment, as well as severe complaints from nearby residents, and in the case of biogas production through anaerobic digestion, the effect of energy efficiency is not large. Digestive waste treatment problems remain.

Therefore, in recent years, drying methods for drying organic wastes and utilizing them as renewable energy resources have attracted attention, and by drying the organic wastes to reduce the water content, excellent solid fuels having a calorific value of 3,000 to 4,000 kcal / kg or more can be obtained. .

Facilities for drying organic wastes include direct and indirect dryers using hot air and steam, and electromagnetic dryers using microwaves.

However, in order to remove moisture evaporated during the drying process, there must be an air flow, which inevitably generates a high-strength condensation gas containing a large amount of moisture, oil, and fly products.

The condensation gas is condensed in a condenser or the like, and condensate wastewater generated at this time is reprocessed or discharged after measuring the degree of contamination.

However, in the case of the current organic waste drying system, the condenser alone has limitations in reducing the pollution level of condensate waste water, and the time and cost of reprocessing it are increasing.

In consideration of these points, a separate facility such as a wet scrubbing tower, activated carbon adsorption tower, bio filter, etc. is installed as a method to reduce the contamination level of condensate wastewater by removing oil or scattering in the condensate gas discharged to the outside during the drying process. Then, there is a method of removing oil or scattering in the condensate gas discharged from the dryer, and then discharging the condensate in a state where the pollution level is reduced.

However, conventionally, in order to treat condensation gas generated during drying of organic waste, a large facility such as a separate condensation gas pre-treatment facility must be provided, so a large place for installation is required, and high cost is required for installation and operation. In particular, in the case of high-concentration oil or scattering mixed with high-temperature steam among the condensation gas generated from the dryer, it is difficult to completely remove the problem, resulting in poor processing efficiency, that is, a limitation in reducing the degree of contamination of the final discharged condensate. There is.

Therefore, the present invention was devised to solve the above problems, and by disposing a pretreatment facility such as a condensation gas purification tower on the discharge line of condensed gas generated in the organic waste drying process, that is, the discharge line of condensed gas, By implementing a new type of condensation gas pretreatment system that can completely remove high concentrations of oil or scattering contained in the condensation gas, it completely blocks the discharge of odor components generated during the drying process to the outside. In addition, it can fundamentally solve the problem of air pollution, as well as improve the processing efficiency of the system such as reducing the pollution level in the final condensate wastewater by removing the oil and scattering in the condensate gas generated in the drying process as much as possible. Providing a condensate gas purification tower for an organic waste drying system that can be operated. It has its purpose.

In order to achieve the above object, the condensation gas purification tower of the organic waste drying system provided in the present invention has the following characteristics.

The condensation gas refining tower of the organic waste drying system is an organic waste drying apparatus including a dryer for drying organic waste, and is installed on a condensation gas discharge line of the dryer, using a hot trap through which condensate gas passes, thereby condensing gas It includes a purification tower to remove the oil in the interior, the purification tower is made of a form that is composed of the entire space except for the space occupied by the condensate gas inlet pipe and the condensate gas outlet pipe in the interior space of the main body of the purification tower while steam flows inside A tablet column body having a hot trap, and two tube members arranged vertically and parallel to the inside of the hot trap of the tablet tower body to introduce and discharge condensation gas through each upper portion and each lower portion to a tablet tower body. Condensate gas in communication with each other through the space inside and below And a “U” shaped condensation gas flow path, which is composed of a condensation gas discharge pipe and rises upward along the condensation gas discharge pipe after the condensate gas flowing down along the condensate gas inlet pipe passes through the space portion. The oil contained in the condensate gas may be removed while passing through the "U" shaped condensate gas flow path formed by the pipe and the condensate gas discharge pipe, and the foreign matter contained in the condensate gas may be removed in the lower inner section of the condensate gas discharge pipe. A cylindrical demister made of a multi-layered wire mesh structure is installed to remove the air, and a fan that removes moisture in the condensate gas by centrifugal force while being located directly below the condensate gas inlet pipe and operated by motor power inside the space part. It is made of a structure that is installed.

Here, the fan is located in a coaxial structure or a single shaft structure with a direct view of the condensate gas inlet pipe, and such a fan is connected to the axis of the fan motor installed vertically with the axis on the bottom of the main body of the purification tower to operate the fan motor. Can be rotated on.

In addition, a steam spray nozzle for providing steam for cleaning the demister may be installed at the upper position of the demister inside the condensation gas discharge pipe.

As a preferred embodiment, a steam spray nozzle device for providing steam for internal cleaning is installed at an upper end of the condensate gas inlet pipe, and the steam spray nozzle device includes a pipe for supplying steam and a relatively rotatable fixing device. It is made of a combination of a ring and a rotating ring, and a pipe is coupled to a bearing with a fixed ring, and a steam diffusion space that is rotatable by being coupled to a rotating ring of the bearing and communicating with a pipe is formed inside, and has a steam injection hole in the circumference. At the same time, at least one nozzle pipe that communicates with the steam diffusion space may be configured with a nozzle body.

At this time, the steam injection hole formed in the nozzle pipe may be formed toward the horizontal direction on the circumferential surface of the end of the nozzle pipe, and accordingly, the nozzle body may be rotated by the steam injection force.

The condensation gas purification tower of the organic waste drying system provided by the present invention has the following effects.

First, by using the condensation gas purification tower arranged at the rear end of the dryer to separate and remove the high concentration of oil and scattering contained in the condensation gas, it is possible to lower the degree of contamination of the finally discharged condensate waste water, causing odor problems. , It has the effect of fundamentally solving environmental pollution problems such as air pollution problems and soil pollution problems.

Second, by applying a method of collecting oil or the like using a hot trap method using steam, there is an effect that can improve the efficiency of treating pollutants such as oil or scattering.

Third, by placing a demister in the hot trap, there is an effect that can effectively remove contaminants such as fine dust (scatter).

Fourth, it is possible to completely remove water particles (moisture) in the condensation gas by installing a fan inside the purification column and rotating the fan at a high speed of 1,000 rpm or more to separate gas and liquid by centrifugal force, and thus, in a subsequent dummyster. It has the effect of improving the performance of removing fine dust and oil.

Fifth, by applying a structure that can periodically clean the inside of the trap using steam, it is possible to increase the efficiency of maintenance and maintenance of the facility, management and operation, and extend the durability life of the facility.

Sixth, it is possible to exclude large-scale facilities for the treatment of condensate waste water as in the past, so that not only can the entire system be efficiently operated, but also the operating cost can be reduced, and energy efficiency due to the recycling of condensate gas that has been pre-processed can be reduced. It can be increased, and there is an advantage in designing a factory layout according to securing space.

1 is a front view showing a condensation gas purification tower of an organic waste drying system according to an embodiment of the present invention

2 is a plan view showing a condensation gas purification tower of an organic waste drying system according to an embodiment of the present invention

Figure 3 is a side view showing a condensation gas purification tower of the organic waste drying system according to an embodiment of the present invention

4 is a perspective view showing a nozzle device for steam spraying in a condensation gas purification tower of an organic waste drying system according to an embodiment of the present invention

5 is a cross-sectional view showing a nozzle device for steam spraying in a condensation gas purification tower of an organic waste drying system according to an embodiment of the present invention

Figure 6 is a front view showing the state of use of the condensation gas purification tower of the organic waste drying system according to an embodiment of the present invention

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

1 to 3 are a front view, a side view and a plan view showing a condensation gas purification tower of an organic waste drying system according to an embodiment of the present invention.

1 to 3, the organic waste drying apparatus to which the condensation gas refining tower of the present invention belongs belongs to a disk-type dryer and employs organic waste, such as food waste or sludge, having a water content of 80% or more. It is a device that can drastically reduce energy costs by drying the waste to less than 10% water content.

For example, the organic waste drying apparatus includes a supply means (not shown) for supplying organic waste, a disk type dryer (not shown) for drying organic waste, a boiler (not shown) for supplying a heat source to the dryer, and a dryer. It includes a cyclone (not shown) for separating particulate organic waste in the condensed gas to be discharged, a condenser (not shown) for condensing condensed gas discharged from a dryer, and a discharge means (not shown) for discharging dry waste.

Here, the structure, operation method, and the like of the dryer, boiler, cyclone, condenser, and the like are the same as those adopted by the existing organic waste drying apparatus, so a detailed description thereof will be omitted.

The basic process of treating organic waste in the organic waste drying apparatus is as follows.

① In the supply means, the organic waste introduced from the waste loading site is put into the input hopper, and the organic waste discharged from the input hopper is supplied to the dryer after passing through the crushing sorter.

② In the dryer, organic waste having an initial moisture content of 80% or more is heated directly or indirectly by steam and discs provided by a boiler, and a process of drying to a final moisture content of 10% or less is performed.

③ In the boiler, a process is performed in which a heat source such as steam for drying organic waste in the dryer is supplied to the dryer side.

④ In the cyclone, condensation gas that is sent through the exhaust line extending from the dryer, for example, about 100 ° C containing oil, organic waste particles, etc., causes a turning action, and thus is contained in the condensation gas. The process of separating the particulate organic waste downward and condensing gas, which is high temperature and humid gas, is performed.

⑤ In the condenser, a process in which condensed gas discharged through the discharge line is condensed by heat exchange with cooling water is generated as condensate.

⑥ In the discharge means, a process in which dry organic waste discharged from a dryer is put into a storage hopper, and dry organic waste discharged from a storage hopper is taken out to a truck or the like to be utilized as a resource.

In particular, in the present invention, the purification tower for condensed gas purification that can reduce the pollution level of condensate wastewater discharged by completely removing high concentrations of oil and scattering contained in the condensation gas generated during the organic waste drying process Gives

That is, the purification tower is operated for the purpose of maximally removing the high concentration of contaminants in the condensate wastewater generated in the organic waste treatment process before treating the condensation gas in the condenser, and thus the treatment cost is calculated by minimizing the pollution degree. To reduce wastewater treatment costs.

To this end, in a predetermined section on the condensation gas discharge line extending from the dryer, for example, a condensation gas discharge line section connected between a cyclone and a condenser, a refinery tower serving to condensate and remove oil contained in the condensate gas ( 11) is installed.

In the refinery column 11, oil or the like in the condensed gas can be effectively removed by using a hot trap that maintains a temperature of about 100 ° C. or higher by steam.

For example, the condensed gas discharged from the dryer passes through a cyclone (not shown) → purification tower 11 → a condenser (not shown) in this order, at this time, about 100 ° C. while the condensed gas passes through the purification tower 11. Under the environment of a degree, the moisture vapor in the condensed gas maintains the water vapor state as it is, and the oil having a higher boiling point is condensed to become a steamy state and can be separated and removed under the purification column.

As described above, the refinery column 11 in charge of effectively removing oil, scattering, and the like from the condensation gas will be described as follows.

The refining tower 11 removes oil, etc. contained in the high concentration of condensation gas by heating or maintaining the temperature of the condensation gas discharged from the dryer, that is, the condensation gas that proceeds along the condensation gas discharge line after passing through a cyclone. It will serve to capture.

To this end, the tablet tower 11 includes a tablet tower body 12 made of a vertical cylindrical tower structure, and the tablet tower body 12 is a tablet having a structure of about 3 to 4 legs. It is installed in an upright position by the top frame 19.

A steam inlet 20 for introducing steam is formed on one side of the outer circumferential surface of the upper portion of the purification tower body 12, and a steam outlet 21 for discharging steam is formed on one side of the lower circumferential surface.

Accordingly, the hot steam entering the upper steam inlet 20 of the tablet tower body 12, for example, steam at about 100 ° C., has a hot trap 10 formed inside the tablet tower body 12. After passing through, it is possible to escape to the lower steam outlet 21.

As a result, the hot steam in the hot trap 10 exchanges heat with the condensate gas flowing inside the condensate gas inlet pipe 13 and the condensate gas discharge pipe 14 to be described later, thereby condensing gas sent from the dryer side. It is possible to maintain the temperature of about 100 ℃, so that the oil or scattering in the condensed gas is condensed and then separated and then dropped and collected in the lower region of the main body of the purification column 12.

For example, the high concentration of condensed gas is a fine dry organic material that is scattered by the wind pressure (about 350 mmAq or more) artificially generated in the drying process of the dryer, that is, as a fine dry organic material in which various oils and the like are mixed, and condensed. As it is mixed with gas, it is dissolved in condensed water, and when condensed gas is condensed, BOD, COD, etc. are increased, which is a major cause of deteriorating the quality of condensate wastewater discharged, that is, increasing the degree of contamination of water.

Therefore, by passing through the condensation gas purification tower with a condenser pre-treatment device, the fine dry organic matter mixed in the condensation gas is removed by using a demister to increase the contact area.

Then, when the supersaturation proceeds in a state in which the fine dry organic matter attached to the demister is progressed, after interlocking the air flow and the air pressure, which mainly affect the drying function, periodically check the high temperature and high pressure steam of about 130 ° C or higher. It is possible to maintain the separation function state of the condensation gas purification tower by desorbing the supersaturated and steamed organic matter and discharging it to the attached rotary valve side at the bottom.

Here, the temperature of the condensate gas entering through the upper inlet of the condensate gas inlet pipe 13 is about 90 ° C., and the temperature of the condensate gas exiting through the upper outlet of the condensate gas outlet pipe 14 after oil or the like is removed. Is about 100 ° C.

That is, the condensation gas containing the fine dry organic matter entering the condensation gas purification tower is about 90 ° C., and the temperature exiting through the upper outlet of the condensate discharge pipe 14 is maintained at about 100 ° C., using the boiling point of water. In terms of fine dry organic matter and oil mixed in condensation gas, condensation can be induced at a relatively low temperature, and moisture can be supplemented to compensate for boiling, thereby inducing efficient separation.

Inside the purification tower body 12, a hot chamber 10 formed in a space form in which steam flows while remaining is formed, and inside the hot chamber 10 formed in this way, a condensation gas inlet pipe 13 and condensation gas are formed. The discharge pipe 14 can be positioned, and thus a heat exchange action can be naturally performed between the steam in the hot chamber 10 and the condensate gas inlet pipe 13 and the condensate gas discharge pipe 14.

In this case, the hot chamber 10 is between the upper plate of the tablet column body 12 and the inside of the lower end of the tablet column body 12, for example, the partition wall 27 installed inside the lower portion of the tablet column body 12. Refers to a space surrounded by the wall of the tablet tower body.

In addition, the inside of the purification tower main body 12, that is, the inside of the hot chamber 10, ensures a long flow path of steam, thereby increasing the time for the steam to stay in the hot chamber 10, thereby exchanging steam. It is provided with a plurality of baffles 22 that can improve.

The baffle 22 is an approximately semicircular plate body having a groove capable of accommodating about 1/2 of the condensate inlet pipe 13 and the condensate gas outlet pipe 14, and the inner wall of the purification tower body 12 It is installed in a structure that is fixed to, each baffle 22 installed in this way can be arranged in a zigzag form while maintaining a constant interval while following the upper and lower length section of the hot chamber (10).

Accordingly, the steam flowing into the interior of the hot chamber 10 can pass through a long path in a zigzag form created by each baffle 22, and eventually the steam will stay inside the hot chamber 10. Since a sufficient time can be secured, the heat exchange between steam and condensation gas can be actively performed.

In addition, inside the refinery tower body 12, a plurality of pipe members, for example, a condensate gas inlet pipe 13 and a condensate gas outlet pipe 14 made of two cylindrical pipes are connected in parallel and vertically arranged. Is installed.

At this time, the upper inlet of the condensate gas inlet pipe 13 is connected to the discharge side of the cyclone through the condensate gas discharge line, and the upper outlet of the condensate gas discharge pipe 14 is connected to the condenser side through the pipe.

In addition, each lower end portion of the condensate gas inlet pipe 13 and the condensate gas discharge pipe 14 communicates with each other with a space portion 15 formed below the inside of the purification tower body 12.

That is, after the condensate gas inlet pipe 13 and the condensate gas outlet pipe 14 pass through the upper end of the purification tower body 12, the hot trap 10 formed inside the purification tower body 12 vertically After traversing, after passing through the partition wall 27 installed inside the lower part of the tablet tower body 12, the space 15 formed on the lower side of the tablet tower body 12, that is, the tablet tower body 12 It is installed in a structure extending to the inner space of the lower space portion 15 partitioned by the partition 27 installed therein.

The lower ends of the condensate gas inlet pipe 13 and the condensate gas outlet pipe 14 installed in this way are located in the space portion 15 so that they can communicate with each other.

Accordingly, the condensate gas entering the inside of the condensate gas inlet pipe 13 through the upper inlet side of the condensate gas inlet pipe 13 descends down along the condensate gas inlet pipe 13 forming a vertical long downward path. Thereafter, after passing through the space portion 15, the condensation gas discharge pipe 14 enters the inside of the condensation gas discharge pipe 14 through the lower end, and the condensate gas thus introduced also forms a vertical long upward path. After going up along the discharge pipe 14, it is discharged through the upper outlet side.

In addition, the hot steam entering the interior of the hot trap 10 through the steam inlet 20 flows around the condensate inlet pipe 13 and the condensate gas outlet pipe 14 while condensing water through heat conduction through the pipe wall. The condensate gas flowing inside the inlet pipe 13 and the condensate outlet pipe 14 can be heated or prevent a drop in temperature, and as a result, the oil and the like in the condensate gas are condensed and separated, and the space portion 15 is determined by its weight. ) As they fall toward the bottom.

While the condensate gas containing oil or the like introduced into the condensation gas purification tower is passed through a long vertical path that is a "U" shaped condensate flow path made by the condensate inlet pipe 13 and the condensate gas outlet pipe 14 After the temperature sufficiently heated by steam is maintained, that is, the oil or the like in the condensation gas is condensed due to a phase transition phenomenon or boiling point, and is separated from the condensation gas and collected downward.

In particular, the inside of the purification tower body 12 is composed of a hot trap 10 that provides a flow path of steam for heating condensate gas.

For example, inside the purification tower body 12, a hot trap 10 consisting of the entire remaining space except for the space occupied by the condensate inlet pipe 13 and the condensate outlet pipe 14 is formed, and the hot trap ( The upper part of 10) is blocked from the outside by the upper plate of the tablet tower body 12, and the lower part is isolated from the space part 15 of the tablet tower body 12 by the partition wall 27, so that the tablet tower body is eventually In the interior of (12), a space 15 in a partitioned form can be formed.

In addition, a steam inlet 20 and a steam outlet 21 for entering and exiting steam are respectively formed on the upper side and the lower side of the refining tower main body 12 to communicate with the hot trap 10 therein. In the case of the steam inlet 20, steam can be supplied from an external boiler (not shown) or the like, and in the case of the steam outlet 21, an external water supply tank (not shown), that is, a water supply tank that supplies water to the boiler side It is connected to the side so that the heat-exchanged steam can be reused.

Accordingly, the steam entering the interior of the hot trap 10 through the steam inlet 20 flows around the condensate gas inlet pipe 13 and the condensate gas outlet pipe 14 while condensate inlet pipe through heat conduction through the pipe wall After performing the heat exchange action with the condensate gas flowing inside the condensate discharge pipe 14 and 13, it is possible to escape through the steam outlet 21.

As described above, in the present invention, the condensation gas flowing inside the condensation gas inlet pipe 13 and the condensate gas discharge pipe 14 is separated from the high temperature steam flowing inside the hot trap 10, and thus in the condensate gas through indirect heat exchange. By condensing oil and the like, there is an advantage in that steam that has been heat exchanged can be recycled.

For example, in the case of direct heat exchange by direct contact between steam and condensation gas, the steam itself is mixed with condensation gas and becomes the waste water as it is, so additional equipment and cost according to the need to treat this large amount of contaminated waste water Although it is required, by applying the indirect heat exchange method between the condensation gas and the steam as in the present invention, there is an advantage in that the steam can also be reused by being sent to the water supply tank side while fundamentally excluding the generation of waste water.

In addition, a drainage pipe 23 is connected to the bottom plate of the main body 12 of the refinery tower, and a valve device 25 that is opened and closed by driving the drain motor 26 is installed at the drain pipe 23 at this time. Therefore, it is possible to periodically collect and process debris, such as oil and moisture, collected at the bottom of the tablet tower body 12, that is, at the bottom of the space 15.

That is, the valve device 25 serves to control the discharge of impurities such as oil collected on the bottom side of the space portion 15 and the moisture collected by the fan 17 to be described later. As a well-known electric valve device such as a butterfly valve operated by driving by (26), a description of its specific structure and operation will be omitted.

Here, the valve device 25 and the drain motor 26 may be installed in a structure supported on a separate auxiliary purification tower frame (not shown).

In addition, the present invention provides a demister (16) as a means to lower the BOD (Biochemical Oxygen Demand) and COD (Chemical Oxygen Demand) by adsorbing and removing foreign substances such as fine dust contained in the condensation gas, as well as oil. do.

The demister 16 is formed of a stainless steel material or the like and is a cylindrical network structure formed of a multi-layered wire mesh structure stacked in multiple layers, and the inner lower section of the condensate discharge pipe 14, for example, a lower space portion ( 15) is installed in the lower inlet section of the condensation gas discharge pipe 14 close to.

Here, since the demister 16 is installed in the lower inlet section of the condensation gas discharge pipe 14, there is an advantage over being installed in other sections.

In other words, it is possible to obtain an effect of about 90% or more by installing the organic material in a thicker state than the one installed in the other section at the bottom where desorption and collection and discharge are easy.

At this time, the demister 16 is made of a cylindrical shape having an outer diameter corresponding to the inner diameter of the condensation gas discharge pipe 14, and may be installed in a coaxial structure within the condensation gas discharge pipe 14, and the demister installed in this way ( 16) can be supported in a structure supported by a bracket (not shown) or the like located on the inner wall of the condensation gas discharge pipe (14).

In particular, since the demister 16 is heated by hot steam flowing inside the hot trap 10, it is possible to maintain a predetermined self temperature, that is, to maintain a constant temperature itself without an artificial heating device. Therefore, in the process of the condensation gas passing through the demister 16, water vapor escapes through the heat transfer effect of the demister 16, and the low-boiling oil vapor can be condensed and separated in the demister 16.

In addition, the demister 16 is a wire mesh made of stainless steel, which has a high heat transfer effect that is transferred from the condensation tower main body 12, and minimizes the condensation rate of water vapor in the condensation gas. It can cause condensation to remove the condensed oil by flowing it down, and it has a multi-layered multi-layered mesh structure, so that when condensation gas flows between wire meshes, scattering dust in the condensed gas through the wire mesh structure can be removed to the maximum. The flow of gas does not give any effect.

Accordingly, after the condensation gas passes through the condensation gas inlet pipe 13, it passes through the space part 15 and passes through the demister 16 in the condensation gas discharge pipe 14, or fine dust contained in the condensate gas. Since the oil and the like are filtered by the demister 16, the final discharged condensate from the condensation gas purification tower reduces the oil and scattering, and the final discharged condensate wastewater meets the BOD and COD-related condensate discharge allowance standards. You can do it.

And, the inside of the condensation gas discharge pipe 14 is provided with a steam spray nozzle 18 as a means for cleaning the inside and the surface of the demister 16.

For example, the inside of the condensation gas discharge pipe 14 is provided with a steam spray nozzle 18 that is supported through the wall of the purification tower body 12, wherein the steam spray nozzle 18 is a condensation gas discharge pipe It is located directly above the upper surface of the demister 16 installed in (14).

Here, the steam spray nozzle 18 is connected to a steam providing means (not shown) such as an external boiler or the like and a pressure providing means (not shown) such as a compressor, so that hot and high pressure steam can be supplied.

Accordingly, during the operation of the condensation gas purification tower or periodically after operation, by attaching high temperature steam to the inside and the surface of the demister 16 through the steam spray nozzle 18 at high pressure, it is attached to a multi-layered wire mesh. Residual oil, etc., as well as fine dust, can be effectively removed, and in the end, the demister 16 is continuously used and the continuous function is secured, thereby improving the treatment efficiency of the purification tower equipment and improving the service life. And in terms of management.

Particularly, in the present invention, the fan 17 is provided as a means to intensively remove moisture contained in the condensate gas to further increase the efficiency of condensation removal for oil, fine dust, and the like on the subsequent thermistor 16 side.

The fan 17 is located immediately below the condensation gas inlet pipe 13 inside the space portion 15, and the fan 17 located in this way is operated (rotated) by motor power to centrifugal moisture in the condensate gas. It will serve to remove.

In addition, the fan 17 is positioned in a coaxial structure or a single shaft structure while looking at the condensation gas inlet pipe 13 so that the condensation gas can be sucked when the fan is operated.

Looking at the installation structure of the fan 17, the fan motor 28 of the vertical posture with the axis upward is installed in a fastening structure at the bottom of the tablet tower body 12, that is, the lower plate, at the same time. The axis of the inside of the tablet tower body 12, the body portion is located outside the tablet tower body 12, respectively.

The fan 17 is coupled to the shaft of the fan motor 28 installed in this way, and accordingly, when the fan motor 28 is operated, the fan 17 rotates and condensed gas exiting the lower end of the condensation gas inlet tube 13 Can be sucked.

Here, the fan 17 rotates at a high speed of about 1,000 rpm or more, and functions to separate gas and fluid by centrifugal force.

Therefore, when the fan motor 28 is operated, the condensation gas from the condensation gas inlet pipe 13 is sucked into the fan 17 side, and at the same time, moisture (water particles) in the condensation gas is caused by strong centrifugal force due to the rotation of the fan. As it is separated, it may come off toward the bottom of the main body of the tablet tower 12.

In addition, when separating moisture in the condensate gas according to the rotation of the fan 17, the oil, fine dust, etc. contained in the condensate gas can be removed while being separated together with the moisture.

The condensation gas from which the moisture is removed is introduced into the condensation gas discharge pipe 14 and continues to pass through the demister 16, so that oil, fine dust, etc. in the condensed gas are separated and removed by the demister 16. It becomes possible.

4 and 5 are a perspective view and a cross-sectional view showing a nozzle device for steam spraying in a condensation gas purification tower of an organic waste drying system according to an embodiment of the present invention.

4 and 5, the steam spray nozzle device 24 removes residues, such as oil and fine dust, attached to the inner wall of the condensation gas inlet pipe 13 with strong steam injection pressure (cleaning) ).

At this time, the nozzle unit 24 for the steam spray may be located at a predetermined height in the condensate gas inlet pipe 13, for example, at an upper end where condensate gas is introduced, and penetrates the wall of the condensate gas inlet pipe 13 It can be installed in a supported structure.

The steam spray nozzle device 24 may be formed in a combination of a pipe 24a for supplying steam, a bearing 24b for rotation support, and a nozzle body 24f for spraying steam while rotating.

Here, the pipe 24a is connected to an external steam generating source (not shown) to receive high pressure steam.

In addition, the bearing 24b is made of a combination of an inner and outer side of a fixed ring and a rotating ring that are relatively rotatable in a state in which they are coupled to each other, and the pipe 24a is inserted into and coupled to the inner fixed ring at the same time. The nozzle body 24f is fastened to the bottom surface of the outer rotating ring.

Accordingly, it is possible to rotate the rotating ring and the nozzle body 24f using the pipe 24a and the fixing ring as a support.

At this time, the bearing 24b may use a known mechanical seal.

In addition, the nozzle body 24f is a circular block shape in which the inside is empty, that is, the steam diffusion space 24c is formed therein, and then welds the butt to the upper housing block and the lower housing block. It can be produced in a manner.

The nozzle body 24f is coaxially disposed under the rotating ring of the bearing 24b, and a plurality of bolts and nuts are fastened in such a state that the nozzle body 24f rotates the bearing 24b. While being supported on the ring side, it can be installed in a rotatable structure.

The lower end of the pipe 24a at the center of the upper surface of the nozzle body 24f installed in this way is connected, and accordingly the pipe 24a supplies steam while communicating with the steam diffusion space 24c in the nozzle body 24f. It becomes possible.

Further, a plurality of nozzle pipes 24e, for example, four nozzle pipes 24e disposed at intervals of 90 ° are mounted on the outer circumference of the nozzle body 24f, wherein the nozzle pipes 24e are nozzles While passing through the outer circumferential wall of the sieve 24f horizontally, it can be combined into a structure that communicates with the inner steam diffusion space 24c.

In addition, a steam injection hole 24d is formed at an end portion of the nozzle pipe 24e, whereby steam can be injected through the nozzle pipe 24e.

In particular, the steam injection hole (24d) formed in the nozzle pipe (24e) is formed toward the horizontal direction on the circumferential surface of the end of the nozzle pipe (24e), and accordingly to the steam injection force discharged through the steam injection hole (24d) By this, the nozzle body 24f can be rotated by itself.

Here, the steam injection holes 24d in the four nozzle pipes 24e installed in the nozzle body 24f are all drilled toward the same direction, and accordingly, the steam injection holes of each nozzle pipe 24e ( As the steam injection force ejected from 24d) is doubled, a smooth rotational operation of the nozzle body 24f can be secured.

As such, while the nozzle body 24f of the nozzle unit 24 for the steam spray installed in the condensate gas inlet pipe 13 rotates, steam through the nozzle pipe 24e of the condensate gas inlet pipe 13 is rotated. By spraying strongly and evenly on the inner wall, debris such as oil and fine dust adhering to the inner wall of the condensation gas inlet pipe 13 can be effectively removed.

Looking at the operating state of the condensation gas purification tower of the organic waste drying system is as follows.

6 is a front view showing the use state of the condensation gas purification tower of the organic waste drying system according to an embodiment of the present invention.

As shown in Fig. 6, the organic waste that is brought in from the waste loading site is dried while sequentially passing through a supply means → crushing sorter (not shown) → dryer → vibration sorting device (not shown) → crusher (not shown) → discharging means. After it is processed, it is taken out for resources.

On the other hand, the condensed gas (high temperature and humidity gas) discharged from the dryer is removed through the cyclone → purification tower 11 → condenser in order to remove particulate organic waste and oil.

At this time, the condensate gas introduced into the refinery column 11 is heated under the high temperature steam environment of the hot trap 10 and the condensate gas inlet pipe is maintained while maintaining the temperature (the temperature of the condensate gas immediately before entering the purification tower) ( 13) and the "U" shaped condensation gas flow path made by the condensation gas discharge pipe 14 goes through a long vertical path, and in this process, the oil and fine dust (spatter) in the condensation gas are sufficiently heated by the steam environment. At the same time as they are condensed from the condensed gas at the maintained temperature, they are separated and gathered downwards. In addition, oil and fine dust in the condensed gas are almost completely filtered while passing through the demister 16 once more.

In particular, the condensed gas exiting the condensed gas inlet pipe 13 is pulled and bumped by a fan 17 rotating at high speed, and in this process, the moisture in the condensed gas is separated from the gas by a large amount at the same time. Since oil and fine dust are also separated together, eventually condensed gas and fine dust that are not condensed in the steam environment can be removed again, and condensed gas from which a large amount of moisture has escaped flows into the demister 16 side. As it becomes, the oil and fine dust in the condensation gas can be more effectively condensed and adsorbed and separated from the demister 16.

In addition, the condensation gas (condensation gas in which oil and fine dust is removed) discharged from the refinery column 11 is sent to a deodorization combustion boiler (not shown) and discharge means through a condenser to incinerate each to remove odors. do.

As described above, in the present invention, for the treatment of organic waste condensation gas generated in the drying process of organic wastes, a high concentration of oil, fine dust, etc. contained in the condensation gas is used by using a pretreatment facility such as a condensation gas purification tower. By establishing a new condensation gas treatment method to completely remove, it is possible to reduce the pollution level of condensate wastewater discharged during the organic waste drying process, and at the same time, to completely remove odorous components to prevent environmental pollution, as well as to improve the efficiency of condensation gas treatment. Of course, the entire facility can be operated economically and efficiently.

[Description of codes]

10: hot trap

11: Purification tower

12: Tablet tower body

13: condensate gas inlet pipe

14: condensate gas discharge pipe

15: space

16: the demister

17: Fan

18: Steam spray nozzle

19: tablet tower frame

20: steam inlet

21: steam outlet

22: baffle

23: drain pipe

24: nozzle unit for steam spray

24a: pipe

24b: Bearing (Mechanical seal)

24c: Steam diffusion space

24d: Steam injection hole

24e: nozzle pipe

24f: nozzle body

25: valve device

26: drain motor

27: bulkhead

28: fan motor

Claims (5)

1. In the organic waste drying apparatus comprising a dryer for drying the organic waste,

   It is installed on the condensation gas discharge line of the dryer and includes a purification tower 11 for removing the oil in the condensation gas using a hot trap 10 through which the condensation gas passes,

   The purification tower 11 is formed in a form in which the steam flows inside and is composed of the entire remaining space except for the space occupied by the condensation gas inlet pipe 13 and the condensate gas discharge pipe 14 in the interior space of the purification tower body 12. A condensed condensation through the upper end of each of two tablet members arranged vertically side by side in the interior of the hot trap 10 of the tablet column body 12 having a hot trap 10 made of the tablet tower body 12 The gas is introduced and discharged, and each lower portion is formed of a condensed gas inlet pipe 13 and a condensed gas discharge pipe 14 that are in communication with each other via the inner lower space portion 15 of the purification tower body 12, wherein A condensed gas flow path of the “U” shape is formed along the condensed gas discharge pipe 14 after the condensed gas flowing down the condensed gas inlet pipe 13 passes through the space portion 15, and the condensed gas flow path is formed. Inlet pipe (13) and condensation Can be the discharge pipe (14) with oil which is included in the condensed gas removed during the condensation through the gas flow path of the "U" shape to the composition,

   In the inner lower section of the condensation gas discharge pipe 14, a cylindrical demister 16 made of a multi-layered wire mesh structure is installed to remove foreign substances contained in the condensation gas.

   Organic waste drying, characterized in that a fan 17 is installed inside the space part 15 to remove moisture in the condensed gas by centrifugal force while being operated directly by a motor power while being located immediately below the condensed gas inlet pipe 13. The system's condensate gas purification tower.
2. The method according to claim 1,

   The fan 17 is located in a coaxial structure or a single shaft structure with a direct view of the condensation gas inlet pipe 13, and the fan 17 is a fan motor installed in a vertical position with an axis up on the bottom surface of the refinery tower body 12 Connected to the shaft of (28), the condensation gas purification tower of the organic waste drying system, characterized in that it can be rotated during operation of the fan motor (28).
3. The method according to claim 1,

   Condensation gas purification of the organic waste drying system, characterized in that the inside of the condensation gas discharge pipe 14 is provided with a steam spray nozzle 18 that provides steam for cleaning the demister at an upper position of the demister 16 tower.
4. The method according to claim 1,

   On the upper end of the condensate gas inlet pipe 13, a steam spray nozzle device 24 is provided to provide steam for internal cleaning.

   The steam spray nozzle device 24 is made of a pipe 24a for supplying steam, a combination of a relatively rotatable fixed ring and a rotating ring, and a bearing 24b to which the pipe 24a is coupled to the fixed ring. , It is coupled to the rotating ring of the bearing (24b) is rotatable, and a steam diffusion space (24c) is formed in communication with the pipe (24a) inside, and has a steam injection hole (24d) at the periphery, and at the same time a steam diffusion space (24c) Condensing gas purification tower of the organic waste drying system, characterized in that it consists of a nozzle body (24f) is equipped with at least one nozzle pipe (24e) to communicate with.
5. The method according to claim 4,

   The steam injection hole 24d formed in the nozzle pipe 24e is formed in a horizontal direction on the circumferential surface of the end of the nozzle pipe 24e, so that the nozzle body 24f can be rotated by the steam injection force. Condensation gas purification tower of the organic waste drying system, characterized in that the.

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