KR102455283B1 - Method for regeneration of activated carbon using superheated steam - Google Patents

Abstract

The present invention relates to a process for regeneration of activated carbon, and according to an embodiment of the present invention, by supplying steam from upper and lower parts by combining a lower steam distributor and an upper steam distributor of an activated carbon regeneration tank, it is possible to further improve the efficiency of activated carbon regeneration along with the improvement of a facility operation rate.

Description

Activated carbon regeneration process using superheated steam

The present invention relates to an activated carbon regeneration process, and more particularly, by applying operating conditions such as a vacuum environment composition and rapid transport using high-pressure water in a large-capacity wastewater treatment system to quickly remove moisture from the activated carbon and smoothly discharge the activated carbon And it relates to a process for efficiently regenerating activated carbon, such as can be transported.

In general, a wastewater treatment facility (汚廢水處理施設) is a facility that purifies and discharges various types of wastewater such as domestic sewage and industrial wastewater to a certain level. Such a wastewater treatment facility is operated by passing wastewater through a water treatment tank filled with an adsorbent, adsorbing harmful components contained in the wastewater with an adsorbent, and purifying the wastewater.

As an adsorbent that is usually filled in water treatment tanks, activated carbon is mainly used as an amorphous material composed mostly of carbon. Such activated carbon is a porous carbonaceous material used as an adsorbent for various purposes, and is not only used in the chemical industry such as purification, removal of harmful substances, decolorization, extraction separation, etc., but also for preventing environmental pollution such as air pollution, waste treatment, and water pollution The demand for phosphorus water treatment, wastewater treatment, exhaust gas adsorption and solvent recovery is continuously increasing in various industrial fields.

Activated carbon, which is used as an adsorbent in most industrial wastewater treatment facilities, fills in the pores formed on the surface of the activated carbon with organic materials at a certain time, and the water purification capability rapidly decreases. is currently doing. In large-scale facilities that usually treat large-scale wastewater, the most burdensome part in terms of cost and facility operation is the part related to the regeneration of activated carbon. Much effort is being put into securing operational efficiency. Currently, most of the activated carbon regeneration methods are to remove organic matter and water pollutants in the pores of the activated carbon by spraying superheated steam at about 500 to 700°C on the activated carbon.

However, this activated carbon regeneration method not only takes a lot of time to raise the temperature inside the tank to an appropriate temperature, but also consumes most of the energy and time to evaporate moisture (to drain water), so there is a disadvantage in terms of energy efficiency. . In addition, in the current activated carbon regeneration method, the process of transferring the activated carbon regenerated from the activated carbon regeneration tank to the reclaimed carbon storage tank and providing it to the water treatment facility is mostly manual. In addition to requiring a lot of time and effort, there is a disadvantage in that the loss rate of activated carbon is high in this process, which is economically also large.

In order to solve this disadvantage, the applicant has invented a device that improves the regeneration efficiency and transport process of activated carbon through Korean Patent No. 10-2092541.

In the case of Korean Patent No. 10-2092541 having the structure shown in FIG. 1, a hopper 10 for input of activated carbon (waste carbon) is installed at the upper end of the activated carbon regeneration tank 13, and at the same time, the lower end of the activated carbon (regenerated carbon) A drain device 11 for discharging is installed, and accordingly, the activated carbon regeneration tank 13 regenerates the spent carbon input through the hopper 10, and discharges the regenerated carbon to the drain device 11. do.

In particular, in this case, the superheated steam injection pipe 12 for spraying superheated steam to the activated carbon (waste carbon) is arranged in parallel in the height direction of the activated carbon regeneration tank 13 inside the activated carbon regeneration tank 13. , is disposed in a structure to inject superheated steam into the activated carbon regeneration tank 13 to supply superheated steam to regenerate the spent activated carbon. However, in the method of supplying superheated steam having such a structure, the effect of supplying uniform superheated steam to the spent activated carbon stacked inside the activated carbon regeneration tank 13 for a limited time is poor, delaying the activated carbon regeneration time, and the regeneration efficiency is somewhat lower There was a downside to falling.

Korean Patent Registration No. 10-2092541

The present invention has been devised to solve the above problem, and an object of the present invention is to supply steam from the upper and lower parts by combining the lower steam distributor and the upper steam distributor of the activated carbon regeneration tank, thereby improving the facility operation rate and the activated carbon regeneration efficiency. It is to provide an activated carbon regeneration process using this by establishing a system structure that can further improve the

As a means for solving the above problems, in an embodiment of the present invention, a waste activated carbon mixture mixed with water is formed, introduced into the activated carbon regeneration tank by hydraulic transport, and air supplied from the air supply unit (A) is supplied. a dehydration process for discharging moisture in the spent activated carbon mixture; a drying step of drying the spent activated carbon by supplying heated air to the carbonized spent activated carbon; a regeneration process of supplying superheated steam to the activated carbon regeneration tank, heating and separating the adsorbed organic components above a boiling point, and regenerating the spent activated carbon; A cooling process of supplying cooling water to the regenerated regenerated activated carbon to cool it; a transferring step of transferring the cooled regenerated activated carbon; to provide an activated carbon regeneration process, including.

According to an embodiment of the present invention, by supplying steam from the upper and lower portions by combining the lower steam distributor and the upper steam distributor of the activated carbon regeneration tank, there is an effect that can further improve the activated carbon regeneration efficiency as well as the facility operation rate improvement.

In particular, a new activated carbon that regenerates activated carbon by installing a lower steam distributor of an upward injection method that sprays steam through a slit inside the activated carbon regeneration tank, and supplying steam from the bottom to the top to the activated carbon side with the lower steam distributor installed in this way By applying the regeneration method, the efficiency and economic feasibility of the overall facility operation related to the activated carbon regeneration treatment can be increased, and there is an effect of simplifying the facility structure and reducing the manufacturing cost, as well as improving the activated carbon regeneration efficiency.

In addition, by adopting a new structure for arranging the lower steam distributor on the inner bottom of the tank, it is easy to manufacture and install, and there is an effect of increasing the efficiency of overall management such as maintenance.

In addition, since the steam sprayed from the bottom to the top of the activated carbon filled in the activated carbon regeneration tank is evenly penetrated to every corner of the inside of the activated carbon, it is possible to shorten the activated carbon regeneration time and at the same time reduce the cost of the activated carbon regeneration In particular, there is an effect of securing excellent quality of regeneration of activated carbon, such as being able to provide uniform and sufficient steam to the activated carbon.

1 is a view showing the structure of an activated carbon regeneration tank applied to the conventional activated carbon regeneration apparatus of the applicant.
Figure 2 shows a process flow chart of the activated carbon regeneration process according to an embodiment of the present invention.
3 is a flowchart illustrating a detailed process progress process of the present invention to which FIG. 2 is applied.
4 is a cross-sectional conceptual view illustrating the configuration of an activated carbon regeneration tower performing the process of FIG. 3 .
5 is a conceptual diagram illustrating an activated carbon regeneration process line including FIG. 4 .
6 is a view showing the structure of the upper injection module of the activated carbon regeneration tank applied to the activated carbon regeneration apparatus according to an embodiment of the present invention.
7 to 9 are views showing the structure of the lower injection module of the activated carbon regeneration tank applied to the activated carbon regeneration apparatus according to an embodiment of the present invention.
10 shows the structure of the upper injection module according to another embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed subject matter may be thorough and complete, and that the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification is present, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

2 is a flowchart illustrating an activated carbon regeneration process (hereinafter, referred to as 'the present invention') according to an embodiment of the present invention, and FIG. 3 is a flowchart illustrating a detailed process progress process. 4 is a cross-sectional conceptual view illustrating the configuration of the activated carbon regeneration tower 100 performing the process of FIG. 3 , and FIG. 5 is a conceptual diagram illustrating the activated carbon regeneration process line including FIG. 4 .

2 and 3, the present invention forms a waste activated carbon mixture mixed with water, flows into the activated carbon regeneration tank by hydraulic transport, and through the air supply from the air supply unit, moisture in the spent activated carbon mixture A dehydration process for discharging carbon dioxide, a drying process for drying the spent activated carbon by supplying heated air to the carbonized spent activated carbon, through the superheated steam supply module disposed in the upper and lower parts of the activated carbon regeneration tank, respectively, from the upper and lower parts At the same time, superheated steam is supplied to the spent activated carbon, the adsorbed organic components are heated and separated above the boiling point, and the regeneration process of regenerating the spent activated carbon. It may be configured to include a cooling process for cooling by introducing cooling water.

In the above process, by improving the structure of the injection module for injecting superheated steam having the structure as shown in FIG. 4 to improve the reliability of the process of regenerating activated carbon, the facility operation rate and activated carbon regeneration efficiency can be further improved do.

Hereinafter, the activated carbon regeneration process to which the present invention is applied will be described in detail with reference to FIGS. 3 to 5 .

1. Dewatering process step

In the present invention, as in the configuration of the process equipment shown in FIGS. 4 and 5, in performing the process of regenerating the spent activated carbon, the hydraulic transport process of transporting the spent activated carbon requiring regeneration in the form of a mixture mixed with water to be transferred into the activated carbon regeneration tower 100 through the This hydraulic transport process has the effect of naturally pulverizing the slurried or agglomerated waste activated carbon when it is mixed with water. The advantage of hydraulic transport is realized in that it can implement transport without loss.

The spent activated carbon transferred into the activated carbon regeneration tank 100 through the spent activated carbon input device 10 is subjected to a dehydration process. In addition, in the lower portion of the spent activated carbon input device 10, a spent activated carbon dispersion plate 15 structure is disposed, and the spent activated carbon mixture (the result of hydraulic transport) injected into the activated carbon regeneration tank is evenly dispersed and distributed therein. make it possible The spent activated carbon dispersion plate 15 is implemented in a structure having a conical outer peripheral surface, and can be disposed below the spent activated carbon input device 10 .

This dehydration process is a process for discharging the transferred water from which the spent activated carbon is hydraulically transferred in the regeneration facility, and vacuum discharge or pneumatic discharge by a blower may be applied. In the case of vacuum discharge, through a vacuum pump, the inside of the activated carbon regenerative tower must be made in a vacuum state and drainage must be implemented, and the configuration of the equipment becomes complicated and the process is somewhat delayed. In the present invention, preferably pneumatic It can be implemented through emission. The dehydration process through pneumatic discharge has the advantage of checking the dehydration state and controlling the dehydration process as described later. (In the case of vacuum discharge, in order to check the dehydration state, release the vacuum environment and , when dehydration is required again, a delay factor in the process of applying vacuum again occurs.)

In the present invention, in particular, in performing the dehydration process through pneumatic discharge, a1) gravity discharging the moisture contained inside the spent activated carbon through a discharge valve connected to the activated carbon regeneration tank 100, a2) the a1) After the step, pneumatic discharge of the moisture contained in the activated carbon by air injection by the blower of the air supply unit (A) connected to the activated carbon regeneration tank 100, a3) Check the dehydration rate by detecting the change in the weight of the activated carbon so that it can be performed through the process of controlling step a1).

First, in step a1), the air discharge valve 11 formed in the upper portion of the activated carbon regeneration tower 100 and the drain valve 105 formed in the lower portion of the activated carbon regeneration tower 100 are simultaneously opened to drain drainage by gravity. make it possible to perform As a preferred example, it is preferable to perform a gravity drainage process of 1 hour or more.

After that, as in step a2), by operating the blower 140, air is supplied to the inside of the activated carbon regeneration tower through a blow valve (not shown), and air injection and drainage for draining moisture in the activated carbon through the air can be performed. to make

In this case, operating the blower 140 and supplying air to the inside of the activated carbon regeneration tower through the blow valve, as shown in FIG. By opening the valve 105 at the same time, it is possible to operate so that air injection and drainage can be performed at the same time.

This blowing process may be made through the superheated steam injection valves 121, 122, 123, and 134, and even in this case, the air introduced by opening the blowing valve (B/V) is the activated carbon regeneration tower ( 100) is injected into the interior, and at the same time, the drain valve 105 is opened at the same time, so that the injection and drainage of air can be performed at the same time.

After performing this drainage process for 30 minutes, the weight of activated carbon before and after operation is compared to check the dehydration efficiency. By detecting the change in the weight of the activated carbon, the dehydration rate is checked, and if additional drainage is required, the above process can be performed again. To check the change in weight, it is possible to apply a method of comparing the weight by collecting an activated carbon sample inside the activated carbon regeneration tower, and a method of sensing the weight change by sensing the total weight of the input activated carbon through a weight sensor.

2. Drying process step

After the above dehydration process, a drying process is performed on the spent activated carbon inside the activated carbon regeneration tower. The drying process is a process that requires the most thermal energy in the regeneration of activated carbon. In the present invention, the drying process is performed by applying the air supply unit (A) to the spent activated carbon in the activated carbon regeneration tank 100 that has undergone a dehydration process. The drying process is performed by supplying heated air for drying to the spent activated carbon.

That is, in the drying process in the present invention, the heated air drying process is performed by supplying the heated air for drying to the spent activated carbon by applying the air supply unit (A) to perform the drying process.

As an example, in order to perform the drying process, in the structure shown in FIGS. 4 and 5, operating the blower 140 and supplying air to the inside of the activated carbon regeneration tower through the blower valve is similar to that shown in FIG. Similarly, by opening the air injection valve (A/V) and the drain valve 105 of the air supply unit (A) at the same time, it can operate so that the injection and drainage of air can be made at the same time. The above process is performed in the same process as the dehydration process, but for drying, the air supply unit (A) is different in that heated dry air is formed and injected.

The process of supplying the heated dry air may be made through the superheated steam injection valves 121, 122, 123, and 134, and even in this case, the air introduced by opening the blower valve B/V operates through the superheated steam injection valves 121, 122, 123, and 134. In this case, it is injected into the activated carbon regeneration tower 100, and at the same time, the drain valve 105 is opened at the same time, so that the injection and drainage of air can be performed at the same time.

In order to supply such heating air, the heater module 126 is operated (SCR control is applied), and when the temperature reaches 25° C., the heater module 126 is operated to have an operating time of 3 hours or more.

After drying, a sample of the activated carbon can be collected, and in this case, a sample of the spent activated carbon is collected at two or more places at the top and the middle of the activated carbon regeneration tower so that the drying rate can be measured.

3. Regeneration process steps

Thereafter, a regeneration process for regenerating the spent activated carbon is performed. The regeneration process is a process of heating and separating by heating the organic component adsorbed on the spent activated carbon to a boiling point or higher by supplying superheated steam to the spent activated carbon, a pyrolysis process of thermally decomposing the separated gaseous VOC component, micropores in the spent activated carbon It will proceed including the process of restoring the pore distribution of the initial activated carbon.

In carrying out this process, the core process is to secure the durability of the device by arranging the superheated steam supply pipe and distribution pipe by thermodynamic and thermodynamic design, and surface treatment with a special material that can prevent high-temperature corrosion, It is very important to efficiently inject superheated steam into the activated carbon regeneration tower.

To this end, in the present invention, as shown in FIGS. 5 and 6, a plurality of superheated steam supply modules 120a, 120b, 120c, each having a superheated steam supply line 125 communicating with the activated carbon regeneration tank 100, 120d)), by supplying superheated steam to the activated carbon so that it can be carried out.

In this case, the superheated steam supply module is disposed on the inner upper portion of the regeneration tank 100 and the lower portion injection module S2 for spraying the superheated steam from the lower part of the regeneration tank 100 to the upper part, the superheated steam to the lower part. Through a plurality of spraying upper part injection modules (S1), it is implemented in a way that superheated steam is simultaneously sprayed from the upper and lower parts for the spent activated carbon, so that the efficiency and economic feasibility of the overall facility operation related to the activated carbon regeneration treatment can be increased, It is possible to simplify the facility structure and reduce the manufacturing cost, as well as improve the activated carbon regeneration efficiency.

As an example, the superheated steam supply module applied to the activated carbon regeneration process of the present invention may be implemented in a structure in which a plurality are disposed inside the activated carbon regeneration tower 100 as shown in FIGS. 4 and 5 , in particular, the upper In the injection module S1, module structures spaced apart from each other may be stacked in parallel in a multi-stage structure, and superheated steam may be sprayed downward from each upper partial injection module (see FIG. 6).

At the same time, the lower part of the activated carbon regeneration tower 100 is disposed in the lower part (S2) (see FIGS. 7 to 9), in a structure opposite to the structure of the above-described upper part of the upper part (S), the activated carbon regeneration tower By spraying high-pressure air in the upward direction, the activated carbon is stirred and the contact area with superheated steam can be maximized.

5 and 6, in the upper part injection module (S1) for injecting superheated steam in the present invention, the superheated steam formed through the superheated steam forming boiler module 110 through the superheated steam supply line 125 is supplied, and it is possible to control whether or not the supply is made through each of the superheated steam supply valves (121, 122, 123, 124, 125).

6 shows a unit object (hereinafter, referred to as a 'unit injection module') of the superheated steam supply module of the present invention. Each unit injection module disposed inside the activated carbon regeneration tank 100 in FIG. 5, as shown in FIG. 7, has a structure in which a plurality of injection tubes decrease in length from the center to the outer portion.

Specifically, the unit injection module, as shown in Figure 6, while receiving the superheated steam from the external superheated steam source 110, the main horizontal pipe 20a installed horizontally in the front and rear direction of the activated carbon regeneration tank; It can be implemented in a structure in which a plurality of sub-horizontal tubes 20b arranged at regular intervals along the longitudinal direction of the activated carbon regeneration tank are arranged on both sides of the main horizontal tube 20a. In particular, in this case, the sub-horizontal tube 20b is arranged such that the sub-horizontal tube C1 disposed at the center of the sub-horizontal tube C1 is arranged such that the sub-horizontal tubes C2 and C3 having a structure in which the length is sequentially decreased.

A plurality of injection holes are formed in the sub-horizontal tubes in a downward direction, so that superheated steam is injected through the downward direction.

In this case, as shown in FIG. 6 , the main horizontal tube 20a is preferably implemented in a structure in which the diameter of the main horizontal tube is gradually reduced along the longitudinal direction of the main horizontal tube. That is, the main horizontal tube 20a is implemented as a tube structure having a relatively wide diameter in which the front end portion A'' into which the superheated steam is introduced, and is implemented in a structure in which the diameter is sequentially reduced, and the end portion B'' ) so that the tube diameter of the area can be implemented with the smallest structure.

In this structure, even when the superheated steam supplied into the main horizontal pipe 20a enters through the distal end B'' from the distal end (A''), the supply pressure does not drop, and both the distal end and the distal end have the same pressure. As a result, even in the case of the sub-horizontal pipe (C5) connected to the distal end of the main horizontal pipe (20a), the sub-horizontal pipe (C1) and Likewise, it is possible to maintain the same supply pressure, so that the superheated steam injected at the same pressure through the injection holes of all the sub-horizontal tubes 20c can be applied to the spent activated carbon, thereby uniformly supplying the superheated steam.

A process of supplying superheated steam to the upper injection module of the present invention having the above structure will be described below. (In a preferred embodiment of the present invention, as shown in FIG. 5 , four superheated steam modules are spaced apart. It will be described with an example of a structure disposed inside the activated carbon.)

Through a plurality of superheated steam supply modules (S: 120a, 120b, 120c, 120d)) having a superheated steam supply line 125 communicating with the activated carbon regeneration tank 100, superheated steam is supplied to the activated carbon. be able to

7 to 9 is a view showing the structure of the lower part of the present invention shown in Figure 5 (S2) of the module (S2).

The lower part injection module (S2) is disposed in the lower portion of the activated carbon regeneration tower 100, by spraying high-temperature steam from the bottom to the top performs a function of stirring the activated carbon and maximizing contact with the superheated steam.

7 and 8, the lower part spray module (S2), the lower steam distributor 17 is supplied with steam from an external steam source (not shown), a hub 17a, and a plurality of slits (17b) It may be configured to include a plurality of horizontal tubes (17c) installed in the form of branches extending from the hub (17a) in addition to spraying steam through the.

The hub 17a is located around the inner center of the activated carbon regeneration tank (FIG. 2:100) of the present invention, for example, at the center of the perforated plate 13 coaxial with the center of the activated carbon regeneration tank (FIG. 2:100). It is possible to be formed as a pair of two semicircular shapes forming a circular trajectory facing each other while being disposed in a coaxial structure around the formed discharge hole 23, and the plurality of horizontal tubes 17c are semicircular hubs 17a. It can be formed in a form extending radially from the inner and outer side parts of the

In addition, the plurality of slits 17b formed in the horizontal tube 17c are arranged in succession along the horizontal tube circumferential direction and are arranged in parallel along the horizontal tube longitudinal direction, at this time the slits ( 17b) may have an approximately wedge-shaped cross-section in which the interval gradually becomes narrower from the inner circumferential surface to the outer circumferential surface.

According to this wedge-shaped cross-sectional structure, the steam induced to be dispersed from the hub 17a to each horizontal tube 17c can be dispersed in the form of bubbles while exiting the slit 17b in the shape of a long torn fine hole. do.

Here, the steam source (FIG. 5:100) may include a boiler, a heater, and the like, and a pipe (not shown) extending from the steam source may be connected to the hub 17a of the lower part injection module S2. . Such a lower part injection module (S2) can be installed close to the right above the perforated plate 13 in the inside of the activated carbon regeneration tank.

For example, a plurality of supports 18 are installed on the upper surface of the perforated plate 13 in a bolt and nut fastening structure, and the hub 17a of the lower steam distributor 17 is installed on each support 18 thus installed. ) is placed on it and is also fixed with a bolt and nut fastening structure or welding structure, etc., so the lower part spray module (S2) can be installed in a structure supported at a certain height while being supported by the support 18, and eventually the lower part spray module When working for maintenance, such as inspection, replacement, cleaning, etc. of (S2), the lower part of the spray module (S2) can be easily removed and can be easily re-installed.

In this way, a lower part spray module (S2) consisting of a combination of a hub (17a) and a horizontal pipe (17c) is installed on the inner bottom side of the activated carbon regeneration tank, and the slit in the horizontal pipe (17c) of the lower part spray module (S2) installed in this way Steam is sprayed from the bottom to the top through (17b). In addition, by spraying linearly through a hole of a long slit structure formed in the horizontal tube of the lower part injection module (S2) during injection, superheated steam is applied to the spent activated carbon stacked on the lower part injection module (S2) inside the activated carbon regeneration tank. It can be applied evenly to every corner, so that balanced steam is applied to all activated carbons, thereby increasing the activated carbon regeneration efficiency.

In addition, since the lower spray module (S2) is installed toward the bottom of the activated carbon regeneration tank and its own structure is also not complicated, the overall structure of the regeneration facility including the steam injection means can be simplified while maintaining the facility as well as maintenance. Operation also has the advantage of being economical and efficient.

Referring to FIG. 9 , the illustrated structure shows another embodiment of the lower part injection module S2 serving to inject superheated steam to the side of the spent activated carbon when regenerating the spent activated carbon.

The lower part injection module S2 shown in FIG. 9 serves to evenly and balanced supply of steam to the activated carbon by spraying superheated steam from the bottom to the top of the activated carbon in an upward injection method using a slit.

To this end, the lower spray module (S2) sprays steam through the hub 17a receiving steam from the external steam supply source 100 and the plurality of slits 17b as well as branches from the hub 17a. It is composed of a plurality of horizontal tubes (17c) installed in the form of extending. As an example of the lower part injection module (S2), the hub (17a) is formed around the center of the activated carbon regeneration tank, for example, the discharge hole ( 23) is made of a pair of two semicircular shapes forming a circular trajectory facing each other while being disposed in a coaxial structure around the circumference, and this semi-shaped pair is each coupler 24 in a state forming a circle facing each other's ends ) to form an integral circle.

That is, the hub 17a may be formed in a circular shape including two couplers 24 , and accordingly, the steam introduced into the hub 17a is connected to the inside of the hub 17a connected as one. Accordingly, it is possible to show a circular flow, and eventually the steam can be evenly distributed to each horizontal tube 17c.

In addition, the plurality of horizontal tubes 17c may be formed in a shape extending radially from the inner and outer side surfaces of the semicircular hub 17a. A plurality of slits (17b) formed in the horizontal tube (17c) are arranged consecutively along the circumferential direction of the horizontal tube and are arranged in parallel along the longitudinal direction of the horizontal tube, at this time the slits (17b) It is possible to have a cross section of a substantially triangular shape in which the interval is gradually narrowed from the inner circumferential surface to the outer circumferential surface.

Accordingly, the steam dispersed from the hub 17a to each horizontal tube 17c can be dispersed in the form of bubbles while exiting the slits 17b in the shape of long torn fine holes. Here, the steam source 16 may include a boiler, a heater, and the like, and a pipe (not shown) extending from the steam source 16 may be connected to the hub 17a of the lower part injection module S2. . This lower part death module (S2) can be installed close to the top of the perforated plate 13 in the inside of the activated carbon regeneration tank. For example, a plurality of supports 18 on the upper surface of the perforated plate 13. ) is installed with a bolt and nut fastening structure, and the hub 17a of the lower part injection module S2 is placed on each support 18 installed in this way and is also fixed with a bolt and nut fastening structure or welding structure, etc., The steam distributor 17 may be installed in a structure supported at a certain height while being supported by the support 18 , and eventually, when working for maintenance such as inspection, replacement, cleaning, etc., of the lower steam distributor 17 . The lower steam distributor 17 can be easily removed and easily reinstalled.

In this way, a lower part spray module (S2) consisting of a combination of a hub (17a) and a horizontal pipe (17c) is installed on the inner bottom side of the activated carbon regeneration tank (12), and the horizontal pipe (17c) of the lower part spray module (S2) installed in this way By spraying steam from the bottom to the top upward through the slit 17b in the It can be applied evenly to every corner, so that balanced steam is applied to all activated carbons, thereby increasing the activated carbon regeneration efficiency.

In addition, since the lower steam distributor 17 is installed toward the bottom of the tank 12 and its own structure is not complicated, it is possible to simplify the overall structure of the regeneration facility including the steam spraying means, and at the same time, maintenance Facility operation also has the advantage of being economically and efficiently.

FIG. 10 shows another embodiment of the upper part-spinning module S1 according to the embodiment of the present invention described above in FIG. 6 .

In the structure of Figure 6, the main horizontal tube (20a) is implemented to be implemented in a structure in which the diameter of the tube is gradually reduced along the longitudinal direction of the main horizontal tube, in this case, the main horizontal tube (20a) is, The tip part (A'') into which the superheated steam is introduced is implemented as a tube structure having a relatively wide diameter, and the diameter is sequentially reduced. Implemented in a structure that can be exemplified.

On the other hand, in the embodiment of FIG. 10, the configuration of the male horizontal tube is exemplified as a tube type structure having a uniform diameter. , even when the superheated steam supplied to the inside of the main horizontal pipe 20a enters from the front end (A'') through the end part (B''), the supply pressure does not drop, and the supply pressure difference between the front end and the end portion is 5 It can be implemented to maintain a pressure in the range of ~10%. That is, when the air distribution hole F1 formed in the main horizontal pipe 20a provides air pressure to the inside of the lower sub-horizontal pipe 20b, the length of the sub-horizontal pipe 20b is the central sub-horizontal pipe ( C1) is implemented as a structure in which the pressure is sequentially reduced. As long as the difference between the air supply pressure and the distal end is within the range of 5 to 10%, it is possible to realize a uniform supply pressure, and the sub-horizontal tube 20b ) through the injection holes (F2, F3), it is possible to evenly spray to the bottom.

4. Cooling process step

After the regeneration process is performed, a cooling process can be performed inside the activated carbon regeneration tank. The cooling process is a pre-treatment process for cooling, transporting, and storing activated carbon that has been regenerated. When cooling water is used, the rapid temperature change of the heated activated carbon prevents the generation of coal due to a change in the properties of the activated carbon, and is performed as a process to minimize the amount of wastewater generated. make it possible

To this end, in the present invention, a two-step cooling process can be performed by the following process.

Specifically, referring to FIG. 5 , in the cooling process in the present invention, b1) cooling water is introduced through the upper part of the activated carbon regeneration tank 100 through the cooling water injection module 110b, but the cooling water Primary cooling that cools the spent activated carbon to 200° C. by introducing cooling water into the inside of the activated carbon regeneration tank 100 according to the operation of the inlet valve (W/V), b2) Backwashing water is introduced through the cooling water supply to regenerate activated carbon Through secondary cooling to cool, it can be implemented as a process to prevent the generation of white smoke.

Based on the cooling water module CM in FIG. 5 , the primary cooling is performed by introducing cooling water from the upper part to the lower part of the activated carbon regeneration tank through the time constant inlet valve 152 for introducing the time constant. Thereafter, the secondary cooling implements cooling through the backwashing water inflow method through the cooling water module (CM). The backwashing water inflow refers to the inflow of cooling water from the cooling water supply unit 150 via the cooling water module to the cooling water supply port 130 through the supply line 137 in the reverse direction. ) means a method of discharging wastewater through the cooling water discharge line 156 and implementing the structure. Secondary cooling according to the present invention can significantly reduce the generation of white smoke in the activated carbon, thereby minimizing the change in the properties of the activated carbon and preventing the generation of powdered coal.

In the above, the present invention has been described based on a preferred embodiment, but the technical spirit of the present invention is not limited thereto, and it is possible to make modifications or changes within the scope described in the claims. Those of ordinary skill in the art to which the present invention pertains is apparent to, and such modifications and variations are intended to fall within the scope of the appended claims.

10: spent activated carbon input device
15: spent activated carbon dispersion plate
100: activated carbon regeneration tank
110: superheated steam source
125: superheated steam supply line
S 1: Upper injection module
S 2: Lower injection module
A: Air supply unit

Claims (10)

It has an input device 10 for injecting activated carbon at the upper end and a drain valve 105 for discharging the activated carbon at the lower end, and has a superheated steam injection module (S: S1, S2) capable of injecting superheated steam into the activated carbon inside Activated carbon regeneration tank 100 for regenerating activated carbon; a superheated steam supply source 110 and a superheated steam supply line 125 for supplying superheated steam to the superheated steam injection modules S1 and S2 installed in the activated carbon regeneration tank 100; an air discharge valve (5) installed on one side of the upper end of the activated carbon regeneration tank (100); An air supply unit (A) for supplying air for dehydration and drying in communication with the inside of the activated carbon regeneration tank 100;
In the activated carbon regeneration tank 100, a dehydration process, a drying process, a regeneration process, and a cooling process are sequentially performed,
In the dehydration process, the dehydration process is performed through pneumatic discharge by a blower with respect to the spent activated carbon introduced into the activated carbon regeneration tank 100, a1) Waste through a discharge valve connected to the activated carbon regeneration tank 100 Gravity discharging the moisture contained inside the activated carbon; a2) after step a1), pneumatically discharging the moisture contained in the activated carbon by injecting air by a blower through the air supply unit (A) connected to the activated carbon regeneration tank 100; a3) controlling the step a1) by detecting a change in the weight of the activated carbon to check the dehydration rate;
In the drying process, the air supply unit (A) is applied to the spent activated carbon in the activated carbon regeneration tank 100 that has undergone the dehydration process to supply warm air for drying to the spent activated carbon to perform the drying process,
The regeneration process is performed by supplying superheated steam to the activated carbon through a plurality of superheated steam supply units 120a having a superheated steam supply line 125 communicating with the activated carbon regeneration tank 100, but the regeneration tank 100 ) Through the lower part injection module (S2) that sprays superheated steam from the bottom to the top, high-pressure air is sprayed toward the upper direction of the activated carbon regeneration tower to agitate the activated carbon and maximize the contact area with the superheated steam, and the regeneration tank ( 100) is disposed on the inner upper portion, through a plurality of upper partial injection modules (S1) for spraying superheated steam to the bottom, it is implemented in a way that the superheated steam is simultaneously sprayed from the top and the bottom for the spent activated carbon,
In the cooling process, b1) cooling water is introduced through the upper part of the activated carbon regeneration tank 100, and the cooling water is introduced into the inside of the activated carbon regeneration tank 100 according to the operation of the inlet valve (W/V). Primary cooling for cooling the spent activated carbon to 200° C. by introducing cooling water into the activated carbon regeneration tank through the cooling water injection module 110b having 110b1) and b2) supplying from the cooling water supply unit 150 via the cooling water module After inflowing the cooling water in the reverse direction to the cooling water supply port 130 through the line 137 in the reverse direction, when cooling is performed, the waste water is discharged through the cooling water supply port 130 again and discharged through the cooling water discharge line 156. It is implemented to prevent the generation of white coal by performing secondary cooling to cool the regenerated activated carbon through the inflow process of washing water.
The upper injection module S1 has a main horizontal pipe 20a guiding the superheated steam flowing in through the superheated steam inlet 120a and a sub horizontal pipe 20b branched from the main horizontal pipe 20a. And, when the air distribution hole (F1) formed in the main horizontal tube (20a) provides air pressure to the inside of the lower sub-horizontal tube (20b), the length of the sub-horizontal tube (20b) is C1) By implementing a structure that sequentially decreases based on the center, the pressure at the tip (A'') where the superheated steam is introduced is strengthened, and the superheated steam supplied into the main horizontal pipe 20a is supplied to the tip (A'') Even when entering through the distal end (B ''), the supply pressure does not drop, and the supply pressure difference between the distal end and the distal end is implemented to maintain a pressure in the range of 5 to 10%,
The lower part injection module S2 sprays steam through a hub 17a receiving superheated steam from an external superheated steam supply source 110 and a plurality of slits 17b, and at the hub 17a. It includes a plurality of horizontal tubes (17c) installed to be spaced apart from each other in a form extending outward, and a plurality of slits (17b) formed in the horizontal tube (17c) are arranged in succession along the circumferential direction of the horizontal tube. It is made in the form of being arranged side by side along the longitudinal direction of the horizontal tube, and the slit (17b) is a structure implemented to have a wedge-shaped cross section in which the interval is gradually narrowed from the inner circumferential surface to the outer circumferential surface,
Activated carbon regeneration process using superheated steam.
delete delete delete delete delete delete delete The method according to claim 1,
The hub 17a,
Semicircle or semi-elliptical tubular structures disposed opposite to each other are disposed,
Applying that the horizontal tube (17c) is implemented in a structure connected to the semi-circle or semi-elliptical tubular structure,
Activated carbon regeneration process using superheated steam. delete

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