KR20230081027A - High Efficiency VOCs Reduction System - Google Patents

Abstract

The present invention relates to a high-efficiency VOCs reduction system, which reduces VOCs while pressurizing and using the VOCs as its own heat source, additionally reducing residual VOCs by installing a catalyst reactor, and controlling the efficiency of the system using a catalyst reactor. there is.

Description

High Efficiency VOCs Reduction System {High Efficiency VOCs Reduction System}

The present invention relates to a highly efficient VOCs reduction system.

Recently, environmental regulations of thermal power plants have become stricter, and in particular, regulations related to fine dust are becoming stricter.

In the case of a solid combustion device including a coal-fired power plant and an incinerator, fine dust is generated from the coal-fired power plant and the incinerator. The problem is that the primary fine dust emitted directly and the secondary fine dust indirectly emitted by NOx and SOx are generated. becomes

에서 0.5초 이상의 체류시간 내 열산화반응에 의해 이산화탄소와 수분으로 제거될 수 있다.It is estimated that there are thousands of types of VOCs (Volatile organic compounds) that affect the generation of secondary fine dust, but the development of reduction technologies for them is relatively insufficient. VOCs and odor components are all between 800 and 850

can be removed into carbon dioxide and moisture by thermal oxidation within a residence time of 0.5 seconds or longer.

In the process of reducing emissions through direct combustion, VOCs composed of various compounds need to secure economic feasibility/technical capabilities through reducing fuel costs and achieving high energy efficiency.

As a conventional technique, the thermal oxidation method, which is a method for reducing VOCs, has high removal efficiency, but consumes high fuel and may generate additional NOx due to direct combustion.

In addition, as a conventional technique, a method of using a heat storage agent, which is a method for reducing VOCs, has been disclosed, but there is a limit to miniaturization of the system due to pressurization.

For example, Korean Patent Document No. 10-2022864 relates to a volatile organic compound treatment system including an absorption tower, a stripping tower, and a regenerative combustion device, which concentrates volatile organic compounds even in a low amount of polluted gas and uses thermal regenerative combustion It provides a technology for processing and recycling process heat, but it is similar to the proposed invention in that it uses VOCs as fuel for combustion, but it is a technology that uses a regenerative combustion facility, and there is a limit to miniaturization of the system according to pressurization.

As another example, Korean Registered Patent Document No. 10-0803764 relates to a flameless heat storage type combustion facility, and includes an auxiliary fuel supply port for mixing supply gas supplied from a supply gas duct with auxiliary fuel and supplying the auxiliary fuel to the main body of the combustion facility. It is configured to be additionally installed, and auxiliary fuel is supplied together with the supply gas to maintain the automatic combustion temperature with the supply gas of Goyang, but flameless combustion is performed using VOCs as fuel, but using a regenerative combustion facility, There is a limit to miniaturization of the system.

(Patent Document 1) Korea Patent Document No. 10-2022864

(Patent Document 2) Korea Patent Document No. 10-0803764

The present invention has been made to solve the above problems.

Specifically, the present invention is to pressurize VOCs and use them as their own heat source.

In addition, the present invention is to reduce the generation of NOx by performing flameless combustion.

In addition, by installing a catalytic reactor, the remaining VOCs are further reduced, but to present various structures of the catalytic reactor.

In addition, the catalytic reactor is installed to reduce residual VOCs, but the opening and closing of the damper and the opening rate are controlled according to the VOCs concentration, flow rate and temperature flowing into the catalytic reactor to optimally reduce residual VOCs.

In addition, the present invention uses a catalyst built-in heater and a direct heating method to keep the heat used for the catalytic reaction constant, and realizes a miniaturized system compared to the prior art by a pressurization process to overcome space limitations. am.

One embodiment of the present invention for solving the above problems is a supply passage 100 including an air supply passage 110 to which air is supplied and a VOCs supply passage 100 to which VOCs (Volatile Organic Compounds) are supplied A flameless combustor 200 in which flameless combustion is performed by reacting air supplied from the supply passage 100 with VOCs; ) and a heat recovery unit in communication with (300); a catalyst reactor (400) positioned at a rear end of the heat recovery unit (300); and an exhaust gas condenser 500 positioned at the rear end of the catalytic reactor 400.

In one embodiment, a compressor 130 located on the supply passage 100 and compressing air and VOCs flowing into the supply passage 100; may be further included.

In one embodiment, a VOCs concentration meter 330 located at the rear end of the flameless combustor 200 and at the front end of the heat recovery device 300 and measuring the amount of VOCs; may include.

In one embodiment, the VOCs complex meter 340, located at the rear end of the heat recovery device 300 and positioned at the front end of the catalytic reactor 400, measures VOCs concentration, VOCs temperature, and VOCs flow rate; may further include.

In one embodiment, the catalytic reactor 400 includes the first to nth catalytic reactors 400 (n is a natural number of 2 or more), and the first to nth dampers 410 are the first to nth catalytic reactors 400. Each is located at the front end of the catalytic reactor 400, and the controller 700 determines the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs concentration and VOCs flow rate measured by the VOCs complex meter 340, It is possible to open and close the 1st to nth dampers 410 and control the opening rate.

In one embodiment, the catalytic reactor 400 includes a 1×1 catalytic reactor 400 to an n×m th catalytic reactor 400 (n is a natural number of 1 or greater and m is a natural number of 1 or greater), and the first damper 410 ) to m dampers 410 are positioned to correspond to the front ends of the 1X1 catalytic reactor 400 to 1Xm catalytic reactor 400, respectively, and the 1X1 catalytic reactor 400 to nXm catalytic reactor 400 ) are arranged in n rows located at the same height and m columns located in a row in the vertical direction, respectively, and the control unit 700 measures the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs complex meter 340. According to the measured VOCs concentration and VOCs flow rate, the first damper 410 to the m-th damper 410 may be opened and closed, and the opening rate may be controlled.

In one embodiment, the catalytic reactor 400 includes a 1X1 catalytic reactor 400 to an nXm catalytic reactor 400 (n is a natural number of 1 or more, m is a natural number of 1 or more), and a 1X1 damper (410 ) to nXm dampers 410 are positioned to correspond to the front end of the nXm catalytic reactor 400, respectively, and the 1X1 catalytic reactor 400 to nXm catalytic reactor 400 are positioned at the same height as each other. The control unit 700 determines the VOCs concentration measured by the VOCs concentration meter 330, the VOCs concentration measured by the VOCs complex meter 340, and the VOCs flow rate. Accordingly, the 1X1 damper 410 to the nXm damper 410 can be opened and closed, and the opening rate can be controlled.

In one embodiment, the first to nth catalytic reactors 400 each include a catalyst having a different reaction temperature depending on the temperature, and the controller 700 controls the temperature of the VOCs measured by the VOCs complex meter 340. According to the above, it is determined which one of the first to nth catalyst reactors 400 including a catalyst having the smallest difference between the measured VOCs temperature and the reaction temperature, and which one of the first to nth dampers 410 Control one to open, and then the control unit 700, according to the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs concentration and VOCs flow rate measured by the VOCs complex meter 340, the first to third The opening rate of any one of the n dampers 410 may be controlled.

In one embodiment, the 1X1 catalytic reactor 400 to the nXm catalytic reactor 400 each include catalysts having different reaction temperatures depending on the temperature, but the same catalysts are located in n rows located at the same height, The control unit 700 controls the 1X1 catalytic reactor 400 to the nXm catalyst including a catalyst having a small difference between the measured VOCs temperature and the reaction temperature according to the VOCs temperature measured by the VOCs complex meter 340. Among the reactors 400, the catalytic reactors 400 in row x located at the same height are determined (x is a natural number of 1 or more and less than or equal to n), and the xth catalytic reactor 400 located in front of the determined catalytic reactor 400 in row x is determined. After controlling the damper 410 to open, the controller 700 controls the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs concentration and VOCs flow rate measured by the VOCs complex meter 340, x The opening rate of the damper 410 can be controlled.

In one embodiment, the 1X1 catalytic reactor to the nXm catalytic reactor 400 (n is a natural number of 1 or more, m is a natural number of 1 or more) include catalysts having different reaction temperatures depending on the temperature, and the control unit 700 According to the temperature of the VOCs measured by the VOCs complex meter 340, the front end of any one of the 1X1 catalytic reactor to the nXm catalytic reactor 400 containing a catalyst having a small difference between the measured VOCs temperature and the reaction temperature. Controls to open any one of the 1X1 damper 410 to the nXm damper 410 located at , and then the control unit 700 measures the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs composite meter According to the VOCs concentration and the VOCs flow rate measured in step 340, the opening rate of any one of the 1X1 damper 410 to the nXm damper 410 may be controlled.

In one embodiment, the controller 700 determines the temperature and the VOCs measured according to the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs concentration and VOCs flow rate measured by the VOCs complex meter 340. A catalyst reactor 400 having a smaller temperature difference next to any one of the 1X1 catalytic reactor to the nXm catalytic reactor 400 including a catalyst having a small reaction temperature difference is determined, and the front end of the corresponding catalytic reactor 400 It is possible to determine whether the other one of the 1X1 damper 410 to the nXm damper 410 is opened or closed and to control the opening rate of the other one of the 1X1 damper 410 to the nXm damper 410. there is.

In one embodiment, the control unit 700 measures the damper 410 by using any one or more of the VOCs concentration, VOCs flow rate, and VOCs temperature measured by the VOCs concentration meter 330 and the VOCs composite meter 340. may be controllable.

In one embodiment, the controller 700 may determine the remaining life of each catalytic reactor 400 and control opening and closing of the first through nth dampers 410 according to the remaining life.

In one embodiment, the controller 700 determines the remaining life of each of the 1X1 catalytic reactor to the nXm catalytic reactor 400, and according to the remaining life, the 1X1 damper 410 to the nX m damper ( 410) can be controlled.

In one embodiment, the catalytic reactor 400 may be a direct heating method.

In one embodiment, the catalytic reactor 400 may not be a direct heating method.

In one embodiment, the exhaust gas condenser 500 further includes a heat exchanger 510 located inside, and the heat recovery device 300 is connected to one end of the heat exchanger 510 so that the low-temperature fluid It may further include a fluid supply unit 310 supplied; and a fluid outlet 320 through which the high-temperature fluid produced by heating the fluid supplied from the fluid supply unit 310 is discharged.

In one embodiment, the flameless combustor 200 may communicate with an additional fuel inlet.

In one embodiment, the stack 600 positioned at the rear end of the exhaust gas condenser 500; may further include.

According to the present invention, the following effects are achieved.

The present invention can reduce VOCs by pressurizing VOCs and using them as fuel. Accordingly, by using the combustion heat of the concentrated VOCs, the fuel consumption rate is low compared to the prior art. In addition, it is possible to reduce the cost of recycling/partial replacement of existing gas adsorbents by concentrating VOCs through a pressure compressor.

In addition, the present invention can reduce the generation of NOx by performing flameless combustion.

In addition, it is possible to miniaturize the system by using a non-thermal storage method, and it is possible to simplify the configuration.

In addition, residual VOCs can be further reduced by installing a catalytic reactor, the size of the catalytic reactor can be reduced by using a built-in catalyst heater, and the heat used in the catalytic reaction can be kept constant by the direct heating method of the catalyst. , energy consumption can be reduced, and heater energy consumption can be adjusted according to the variable load and reaction temperature.

In addition, the residual VOCs can be reduced by installing a catalytic reactor, and the residual VOCs can be optimally reduced by controlling the opening and closing of the damper according to the concentration, flow rate and temperature of the VOCs flowing into the catalytic reactor.

In addition, it is possible to control the operation of the catalytic reactor suitable for the VOCs temperature by using catalysts having different reaction degrees depending on the temperature in the catalytic reactor, so that residual VOCs can be optimally reduced.

In addition, when the process temperature fluctuates, the reaction temperature can be maintained with the built-in heater in the reactor to maintain and secure the VOCs reduction efficiency.

In addition, through the design of a high-efficiency heat exchanger and an exhaust gas condenser, an increase in energy recovery rate and minimization of fine dust emissions can be achieved at the same time.

1 is a diagram for explaining a system according to a first embodiment.
2 is a diagram for explaining a system according to a second embodiment.
3 is a diagram for explaining a system according to a third embodiment.
4 is a diagram for explaining a catalyst reactor according to a fourth embodiment.
5 is a view for explaining various arrangements of a catalytic reactor according to the present invention.
6 is a schematic diagram for explaining the operation according to the control unit.
7 is a view for explaining the reaction of different types of catalysts depending on the temperature.

In some cases, in order to avoid obscuring the concept of the present invention, well-known structures and devices may be omitted or may be shown in block diagram form centering on core functions of each structure and device.

In addition, in describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the embodiment of the present invention, which may vary according to the intention or custom of a user or operator. Therefore, the definition should be made based on the contents throughout this specification.

The system according to the present invention may include a supply flow path 100, a flameless combustor 200, a heat recovery unit 300, a catalytic reactor 400, an exhaust gas condenser 500, a stack 600, and a control unit 700. can

Referring to Figures 1 to 7, a system according to the present invention will be described.

Air and VOCs may be supplied to the supply passage 100, and air and VOCs may flow to the flameless combustor 200 to be described later.

The supply passage 100 may include an air supply passage 110 and a VOCs supply passage 120 .

The air supply passage 110 may be supplied with air to flow. The air supply passage 110 is connected to the flameless combustor 200 and supplies air to the flameless combustor 200 .

The VOCs supply passage 120 may be supplied and flowed with VOCs. The VOCs supply passage 120 is connected to the flameless combustor 200 and supplies VOCs to the flameless combustor 200 .

Compressors 130 may be respectively positioned on the air supply passage 110 and the VOCs supply passage 120 .

The compressor 130 may compress the volume of the gas to 1/10 of normal pressure through pressurization of about 10 bar or more to primarily concentrate VOCs.

More preferably, the compressor 130 may perform pressurization of 20 bar.

Accordingly, the system can be further miniaturized.

The flameless combustor 200 communicates with the supply passage 100 and receives air and VOCs from the supply passage 100 to perform flameless combustion.

At this time, the pressure of air and VOCs supplied to the flameless combustor 200 may be 20 bar.

In the flameless combustor 200, it is possible to achieve a VOCs removal rate of 99% or more through thermal oxidation by utilizing VOCs as fuel.

로 발생이 가능하여, NOx 발생량을 저감할 수 있다.In addition, it is possible to minimize NOx generation while satisfying the VOCs removal temperature through flameless combustion. That is, flameless combustion is implemented in the flameless combustor 200, and the flameless combustion suppresses the temperature of the flame to make the flame 800 to 900

can be generated, so the amount of NOx generated can be reduced.

When the amount of VOCs introduced into the flameless combustor 200 is low, additional fuel may be input through an additional fuel supply unit, and the added fuel may be natural gas.

The heat recovery device 300 is located at the rear end of the flameless combustor 200 and communicates with the flameless combustor 200 .

The heat recovery unit 300 introduces exhaust gas and remaining VOCs generated as a result of flameless combustion of air and VOCs in the flameless combustor 200.

In the heat recovery unit 300, energy efficiency may be increased by recovering heat generated in the VOCs oxidation process in the flameless combustor 200.

The heat recovery unit 300 may be connected to the heat exchanger 510 located in the exhaust gas condenser 500 to be described later, and receive a high-temperature fluid from one end of the heat exchanger 510.

The fluid supply unit 310 is connected to the supply water outlet 530 and may further include a fluid outlet 320 through which the fluid supplied from the fluid supply unit 310 is discharged to the outside.

The fluid supplied from the fluid supply unit 310 may be further heated while passing through the inside of the heat recovery unit 300 .

At this time, the structure in which the fluid supply unit 310 and the fluid supply unit 320 are connected inside the heat recovery unit 300 is not limited to a specific structure.

Of course, the high-temperature fluid discharged from the heat recovery unit 300 to the outside can be utilized in various ways.

When the amount of VOCs treated in the flameless combustor 200 is rapidly increased, even though NOx can be reduced, the VOCs reduction rate is low, so residual VOCs (VOCs slip) may occur.

In the present invention, VOCs are reacted in the catalytic reactor 400 to remove residual VOCs after passing through the flameless combustor 200, and the control unit 700 flows into the catalytic reactor 400 according to the VOCs concentration, flow rate, and temperature. In order to control the VOCs present, the VOCs concentration, flow and temperature are measured.

A VOCs concentration meter 330 may be positioned at the front of the heat recovery device 300 and at the rear of the flameless combustor 200.

The VOCs concentration meter 330 may measure the VOCs concentration remaining in the flue gas after passing through the flameless combustor 200. Depending on the results measured by the VOCs concentration meter 330, whether the damper 410 is opened or closed and the opening rate may be controlled. A detailed description of this will be described later in the second to fourth embodiments.

In addition, a VOCs complex meter 340 may be positioned at the rear of the heat recovery device 300 and the rear of the catalyst reactor 400 .

The VOCs composite meter 340 can measure all of VOCs concentration, flow rate and temperature.

Accordingly, in the present invention, the VOCs concentration after passing through the flameless combustor 200 and the VOCs concentration and flow rate changed after the exhaust gas heat exchange through the heat recovery device 300 can be measured, and the catalytic reactor 400 The concentration and flow rate of VOCs flowing can be accurately determined, and whether the damper 410 is opened or closed and the opening rate can be controlled using this.

In addition, in the present invention, since the VOCs temperature is measured by the VOCs complex meter 340, it can be used to determine which damper 410 is to be opened and closed for optimal reaction in the catalytic reactor 400 described later, and the VOCs temperature Accordingly, the opening rate of the damper 410 can be controlled. Meanwhile, the operation of controlling whether to open or close the damper 410 and the rate of opening according to the VOCs concentration, flow rate, and temperature can be performed simultaneously by determining whether the damper 410 is opened or not and the rate of opening are determined by the controller 700, of course.

A detailed description of this will be described later in the second to fourth embodiments.

At this time, the controller 700 can control the damper 410 using at least one of the VOCs concentration, VOCs flow rate, and VOCs temperature measured by the VOCs concentration meter 330 and the VOCs composite meter 340, and the VOCs concentration , the damper 410 can be controlled using only one of the VOCs flow rate and VOCs temperature.

The catalytic reactor 400 is positioned at the rear end of the heat recovery device 300 and positioned at the front end of the flue gas condenser 500.

The catalytic reactor 400 may additionally remove remaining VOCs, further increasing VOCs reduction efficiency.

In addition, the damper 410 may be positioned at the front end of the catalytic reactor 400, and a plurality of catalytic reactors 400 may be positioned, and the damper 410 opens and closes and opens according to the VOCs flow rate, concentration, and temperature. this can be controlled. Each of the plurality of catalytic reactors 400 includes a catalyst, and since the catalytic reactor 400 to react according to the VOCs temperature is determined, the catalytic reactor 400 having a similar reaction temperature to the VOCs temperature can be reacted. In this case, the catalytic reactor 400 can optimally activate the reaction of the catalyst without including a separate heater. A detailed description of this will be described later in the second to fourth embodiments to be described later.

At this time, that the catalyst reactor 400 includes a catalyst means that the catalyst is coated on the surface of the reactor, but is not limited thereto.

In another embodiment of the present invention, the catalyst reactor 400 may maintain an optimal catalyst activation temperature by using a direct heating method.

The direct heating method means that the temperature of the catalytic reactor 400 is controlled by a heater positioned adjacent to the catalytic reactor 400, and the heater may be built into the catalytic reactor 400, but is not limited thereto.

In the present invention, the catalytic reactor 400 may include both a direct heating method and a non-direct heating method, and is not construed as being limited to a specific type and type of catalytic reactor 400 .

The exhaust gas condenser 500 is a device capable of condensing exhaust gas and includes a heat exchanger 510.

The exhaust gas condenser 500 is located at the rear end of the catalytic reactor 400 and is located at the front end of the stack 600.

The exhaust gas condenser 500 includes a heat exchanger 510, and latent heat of moisture contained in the exhaust gas can be recovered through additional heat exchange.

The heat exchanger 510 may be connected to the supply water inlet 520 .

Feed water may be supplied to the feed water inlet 520 and supplied to the inside of the heat exchanger 510, and the feed water may exchange heat with the flue gas flowing through the flue gas condenser 500 while flowing into the heat exchanger 510. , By recovering the latent heat of moisture in the exhaust gas in the exhaust gas condenser 500, the gas in the exhaust gas can be recovered as a liquid.

At this time, the heat exchanger 510 is installed inside the exhaust gas condenser 500 and may be formed in a size considering heat exchange efficiency, and the size of the heat exchanger 510 is not limited to that shown.

The exhaust gas condenser 500 may further include a feedwater outlet 530 and a feedwater flow path 540 .

The supply water passage 540 is formed to be connected to the heat exchanger 510 , and heat recovered from the heat exchanger 510 may be supplied to the heat recovery unit 300 through the supply water outlet 530 . The exhaust gas condenser 500 may be connected to the fluid supply unit 310 of the aforementioned heat recovery unit 300 to supply high-temperature fluid to the fluid supply unit 310 .

At this time, the heat exchanger 510, the supply water inlet 520, the supply water outlet 530, and the supply water passage 540 are not limited to the illustrated positions and structures.

In addition, in the present invention, by using the exhaust gas condenser 500, NO can be converted to NO2 to remove residual NOx (NOx emissions of 1 ppm or less).

Accordingly, it may be possible to simultaneously reduce flue gas while additionally increasing energy efficiency through latent heat recovery in exhaust gas.

The exhaust gas condenser 500 may have one end connected to the stack 600 to flow exhaust gas.

At this time, the flue gas flowing from the flue gas condenser 500 to the stack 600 has removed residual NOx in the flue gas condenser 500, NOx and white smoke are excluded, and CO2 and N2 may be included.

The stack 600 is positioned at the rear end of the exhaust gas condenser 500 and discharges exhaust gas to the outside.

As described above, exhaust gas discharged from the stack 600 may exclude NOx and white smoke, and may include CO2 and N2.

Hereinafter, in the second to fourth embodiments, the components applied in the same manner as in the first embodiment will be replaced with those described above, and the second to fourth embodiments are the catalytic reactor 400 and the damper 410 Classified according to placement.

Referring to Fig. 2, a second embodiment will be described.

In the second embodiment, the catalytic reactor 400 includes the first to nth catalytic reactors 400 to provide a way to more effectively remove residual VOCs.

As shown in FIG. 2, the first to nth catalytic reactors 400 may be vertically arranged in a row, but are not limited thereto, and the first to nth catalytic reactors 400 are vertically or horizontally arranged in a row. can be located as

In addition, the first to nth catalytic reactors 400 may react by including different types of catalysts. A detailed description of this will be described later.

According to the VOCs concentration measured by the VOCs concentration meter 330, the VOCs concentration measured by the VOCs concentration meter 340, and the VOCs flow rate, the first to nth dampers 410 in the catalyst reactor 400 are opened and closed, and the opening rate this can be controlled.

When the VOCs concentration measured by the VOCs concentration meter 330 increases, the control unit 700 may increase the opening rate at which the first to nth dampers 410 in the catalytic reactor 400 are opened and closed, respectively. Accordingly, The reaction can be controlled in the catalytic reactor (400).

In addition, when the VOCs concentration and the VOCs flow rate measured by the VOCs complex meter 340 increase, the control unit 700 increases the opening rate at which the first to nth dampers 410 in the catalyst reactor 400 are opened and closed, respectively. And, accordingly, the reaction in the catalytic reactor 400 can be controlled.

Alternatively, the controller 700 controls the VOCs concentration measured by the VOCs concentration meter 330, the VOCs concentration measured by the VOCs composite meter 340, and the VOCs flow rate, so that the first to nth dampers 410 are opened or closed. You can also increase the number.

Alternatively, the controller 700 opens or closes the first through nth dampers 410 according to the VOCs concentration measured by the VOCs concentration meter 330, the VOCs concentration measured by the VOCs complex meter 340, and the VOCs flow rate. However, the opening rate of the first to nth dampers 410 may be increased or decreased.

That is, in the second embodiment, when the VOCs concentration measured by the VOCs concentration meter 330, the VOCs concentration measured by the VOCs complex meter 340, and the VOCs flow rate are large, the opening rate of the catalytic reactor 400 is increased or the first The number of catalytic reactors 400 reacting can be increased by increasing the number of open or closed th n-th dampers 410, and by increasing the amount of exhaust gas flowing into the catalytic reactor 400, VOCs can be reduced. can

In addition, in the second embodiment, when the VOCs concentration measured by the VOCs concentration meter 330, the VOCs concentration measured by the VOCs complex meter 340, and the VOCs flow rate are large, the number of catalyst reactors 400 is increased to increase the number of catalyst reactors (400). ), VOCs can be reduced by increasing the amount of flue gas flowing into the

In addition, in the second embodiment, the catalyst reactor 400, which reacts according to the temperature of VOCs measured by the VOCs complex meter 340 located at the rear of the heat recovery device 300 and located at the front of the catalyst reactor 400, is further provided. You can control it.

Each of the first to nth catalytic reactors 400 may include catalysts having different reaction temperatures depending on temperature. At this time, the catalytic reaction differs depending on the temperature, which will be described later.

In this case, the control unit 700 selects one of the first to nth catalyst reactors 400 having the smallest difference between the measured VOCs temperature and the reaction temperature according to the VOCs temperature measured by the VOCs complex meter 340. It may be determined and controlled to open any one of the first through nth dampers 410 .

The control unit 700 determines the catalytic reactor 400 including the catalyst having the highest reaction rate at that temperature according to the measured VOCs temperature, and controls the damper 410 so that the reaction occurs in the catalytic reactor 400 including the corresponding catalyst. ) is opened. That is, when the first to nth catalytic reactors 400 contain catalysts having different reaction temperatures depending on the temperature, the control unit 700 first determines the VOCs temperature and selects which of the first to nth dampers 410 to be opened. After determining one, it is possible to control the opening rate of the damper 410 according to the VOCs flow rate and concentration.

Also, thereafter, the control unit 600 determines the temperature and reaction temperature of the VOCs measured according to the VOCs flow rate and concentration measured by the VOCs concentration meter 330 and the VOCs composite meter 340, when the VOCs flow rate and concentration are equal to or greater than the preset values, respectively. In addition to the catalytic reactor 400 in which the difference of is determined, the catalytic reactor 400 including the catalyst having the next smallest temperature difference is determined, and the damper 410 located at the front end of the catalytic reactor 400 is further opened Of course, you can control it to do so.

Referring to Fig. 3, a third embodiment will be described.

In the third embodiment, 1X1 catalytic reactors 400 to nXm catalytic reactors 400 (n is a natural number of 1 or more and m is a natural number of 1 or more) are included, and the first to m dampers 410 are 1X1 catalysts, respectively. The reactors 400 to nX1 catalytic reactors 400 are respectively positioned at the front end.

The 1X1-th catalytic reactors 400 to nXm-th catalytic reactors 400 are arranged in n rows positioned at the same height and m rows positioned in a vertical direction, respectively.

The 1×1 catalytic reactor 400 to the n×m catalytic reactor 400 mean that m catalytic reactors 400 located at the same height are located.

The 1X1 catalytic reactor 400 to the nX1 catalytic reactor 400 are directly connected to the rear end of the heat recovery device 300, and the first to the 1X1 catalytic reactor 400 to the nX1 catalytic reactor 400 are connected directly to the rear end. m damper 410 is located.

That is, in this embodiment, the opening and closing of the catalytic reactors 400 at the same height can be controlled by one damper 410 .

When the VOCs concentration measured by the VOCs concentration meter 330, the VOCs concentration measured by the VOCs complex meter 340, and the VOCs flow rate are increased, the control unit 700 controls the first to m dampers 410 in the catalytic reactor 400. ) can increase the open rate, respectively, and accordingly, the reaction rate can be controlled in the 1X1 catalytic reactor 400 to the nXm catalytic reactor 400.

Alternatively, the controller 700 controls the VOCs concentration measured by the VOCs concentration meter 330, the VOCs concentration measured by the VOCs complex meter 340, and the VOCs flow rate, so that the first to mth dampers 410 are opened or closed You can also increase the number.

In this embodiment, as described above, in the VOCs complex meter 340 positioned at the rear of the heat recovery device 300 and at the front of the catalyst reactor 400, the catalyst reactor reacting according to the temperature of the measured VOCs ( 400) can be controlled.

The 1X1 catalytic reactor 400 to the nXm catalytic reactor 400 each include catalysts having different reaction temperatures depending on the temperature, but the same catalysts may be positioned in n rows located at the same height. At this time, the catalytic reaction differs depending on the temperature, which will be described later.

The control unit 700 determines whether the first 1X1 catalytic reactor 400 to the nXm catalytic reactor 400 have the same temperature difference between the measured VOCs temperature and the reaction temperature according to the temperature of the VOCs measured by the VOCs complex meter 340. Determining the catalytic reactor 400 in row x located at the height (x is a natural number of 1 or more and less than or equal to n), and controlling to open the x damper 410 located in front of the determined catalytic reactor 400 in row x can do.

The controller 600 determines the catalytic reactor 400 including the catalyst having the highest reaction rate at that temperature according to the measured VOCs temperature, and causes the reaction to occur in the catalytic reactor 400 in row x containing the corresponding catalyst. The xth damper 410 is opened. That is, when the 1X1 catalytic reactor 400 to the nXm catalytic reactor 400 include catalysts having different reaction temperatures depending on the temperature, the control unit 700 first determines the VOCs temperature to open the x damper 410 It is possible to determine and then control the opening rate of the damper 410 according to the flow rate and concentration of VOCs.

Thereafter, the control unit 600 determines the difference between the measured VOCs temperature and the reaction temperature according to the VOCs flow rate and concentration measured by the VOCs concentration meter 330 and the VOCs composite meter 340, when the VOCs flow rate and concentration are each greater than a preset value. In addition to the catalytic reactor 400 for which is determined, a catalytic reactor 400 including a catalyst having the next smallest temperature difference is determined, and the damper 410 located at the front end of the catalytic reactor 400 in the corresponding row is further opened Of course, you can control it to do so.

At this time, the number of 1X1 catalytic reactors 400 to nXm catalytic reactors 400 is not limited to those shown, and structures other than the catalytic reactor 400 and the damper 410 in FIG. 3 are omitted.

Referring to Fig. 4, a fourth embodiment will be described.

In the fourth embodiment, the 1X1 catalytic reactor 400 to the nXm catalytic reactor 400 (n is a natural number of 1 or more, m is a natural number of 1 or more), and the 1X1 damper 410 to the nXm damper 410 ( n is a natural number greater than or equal to 1, and m is a natural number greater than or equal to 1) are positioned in front of the 1X1 catalytic reactor 400 to the nXm catalytic reactor 400, respectively.

The number of dampers 410 is positioned according to the number of catalytic reactors 400 .

The nXm catalytic reactor 400 means a structure of n rows and m columns, and the total number of catalytic reactors 400 is nXm.

In FIG. 4, a 3X3 catalytic reactor 400 is shown, and a total of nine catalytic reactors 400 are shown. At this time, the arrangement and number of catalyst reactors 400 are not limited to those shown.

In the fourth embodiment, each catalytic reactor 400 is connected to the rear end of the heat recovery device 300 to receive VOCs, and is connected to the exhaust gas condenser 500 to the rear end of each catalytic reactor 400, respectively. A structure capable of controlling the reaction of the catalytic reactor 400, but some connection structures on the drawing are omitted.

The opening and closing of each one of the catalytic reactors 400 may be controlled by one damper 410 .

When the VOCs concentration measured by the VOCs concentration meter 330, the VOCs concentration measured by the VOCs complex meter 340, and the VOCs flow rate are increased, the control unit 700 controls the 1X1 damper 410 to the nXm damper 410, respectively. The open rate of opening and closing can be increased, and accordingly, the reaction rate can be controlled in the 1X1 catalytic reactor 400 to the nXm catalytic reactor 400 .

Alternatively, the control unit 700 may set the 1X1 damper 410 to the nXm damper 410 according to the VOCs concentration measured by the VOCs concentration meter 330, the VOCs concentration measured by the VOCs complex meter 340, and the VOCs flow rate. It is also possible to increase the number of openings or closings.

In this embodiment, as described above, in the VOCs complex meter 340 positioned at the rear of the heat recovery device 300 and at the front of the catalyst reactor 400, the catalyst reactor reacting according to the temperature of the measured VOCs ( 400) can be controlled.

Each of the 1X1 catalytic reactor 400 to the nXm catalytic reactor 400 may include catalysts having different reaction temperatures depending on the temperature. At this time, the catalytic reaction differs depending on the temperature, which will be described later.

At this time, different types of catalysts may be arranged and used for each catalytic reactor 400, but the present embodiment is not limited thereto, and the same type of catalysts may be arranged and used in the same row as described above in this embodiment.

The controller 700 controls the 1X1 catalytic reactor 400 to the nXm catalytic reactor 400 including catalysts having a small difference between the measured VOCs temperature and the reaction temperature according to the temperature of the VOCs measured by the VOCs complex meter 340. ), any one of the 1X1 th damper 410 to the nXm th damper 410 controls to open any one of the nXm th catalytic reactors 400, respectively.

The control unit 600 determines the catalytic reactor 400 including the catalyst having the highest reaction rate at that temperature according to the measured VOCs temperature, and controls the damper 410 so that the reaction occurs in the catalytic reactor 400 including the corresponding catalyst. ) is opened. That is, when the 1X1 catalytic reactor 400 to the nXm catalytic reactor 400 include catalysts having different reaction temperatures depending on the temperature, the control unit 700 first determines the VOCs temperature to open the 1X1 damper 410. After determining any one of the through nXmth dampers 410, the opening rate of the damper 410 may be controlled according to the flow rate and concentration of VOCs.

Thereafter, the control unit 600 determines the temperature and reaction temperature of the VOCs measured according to the VOCs flow rate and concentration measured by the VOCs concentration meter 330 and the VOCs composite meter 340, when the VOCs flow rate and concentration are equal to or greater than the preset values, respectively. In addition to the catalytic reactor 400 for which the difference is determined above, the catalytic reactor 400 including the catalyst having the next smallest temperature difference is determined, and the damper 410 located at the front end of the catalytic reactor 400 is further opened Of course, you can control it to do so.

At this time, the number of 1X1 catalytic reactors 400 to nXm catalytic reactors 400 is not limited to that shown, and structures other than the catalytic reactor 400 and the damper 410 in FIG. 4 are omitted.

In addition, the catalyst lifespan of the catalytic reactor 400 can be managed in real time by the control unit 700, and the control unit 700 considers the lifespan of each catalytic reactor 400, and the 1X1 damper 410 to nXm damper (410) can also be controlled to open and close.

At this time, the above-described arrangement of the catalytic reactor 400 and the damper 410 is not limited thereto, and the catalytic reactor 400 and the damper 410 may be arranged in various ways. For example, in FIG. 5, a 2X2X2 catalytic reactor 400 is shown, and structures other than the catalytic reactor 400 and the damper 410 are omitted, but the front end of the damper 410 is connected to the heat recovery device 300 and the catalytic reactor 400 ) The flue gas condenser 500 is positioned at the rear end.

Referring to Figure 7, the temperature according to the catalyst will be described.

Catalysts have different activation temperatures with the highest efficiency, and due to the nature of catalysts, their reactivity at very high temperatures is poor and poisoning may occur.

Since the activation temperature differs depending on the type of catalyst, a suitable catalyst reactor 400 is opened and used according to the temperature of the generated gas.

, 200℃?, 300℃?이다.For example, the maximum VOCs reduction catalytic activity temperature of Au/Co3O4, Bulk Co3O4, and Au/Bulk Co3O4 catalyst materials is 150

, 200℃?, 300℃?.

에서 발생 시 (A)만 개방하여 사용한다. 이 경우, (B),(C)는 해당 온도에서 낮은 VOCs 저감 특성을 보이므로, 만약 (B),(C)를 같이 사용한다면 촉매량 대비 VOCs 효율이 낮으므로 효율적이지 못하며, (B),(C) 표면에는 부산물이 쌓일 수 있어 촉매의 수명이 단축되는 문제가 있다.150 VOCs

When it occurs in, only (A) is opened and used. In this case, (B) and (C) show low VOCs reduction characteristics at the corresponding temperature, so if (B) and (C) are used together, it is not efficient because the VOCs efficiency is low compared to the catalyst amount, C) There is a problem in that the life of the catalyst is shortened because by-products can accumulate on the surface.

에서 발생 시 (C)만 개방하여 사용한다. 이 경우, (A), (B) 표면에는 부산물이 쌓이지 않으므로 촉매의 수명을 높일 수 있다.300 VOCs

When it occurs in, open and use only (C). In this case, since by-products are not accumulated on the surfaces of (A) and (B), the life of the catalyst can be increased.

In the present invention, since all catalysts are selectively used according to the temperature, the overall lifespan of the catalyst can be increased, and cost reduction and long-term operation of the system are effective.

At this time, the type and operating method of the above-mentioned catalyst are examples and may be different depending on the type of target VOCs, of course.

In the above, the present specification has been described with reference to the embodiments shown in the drawings so that those skilled in the art can easily understand and reproduce the present invention, but this is only exemplary, and those skilled in the art can make various modifications and equivalents from the embodiments of the present invention. It will be appreciated that embodiments are possible. Therefore, the scope of protection of the present invention should be defined by the claims.

100: supply euro
110: air supply passage
120: VOCs supply euro
130: compressor
200: flameless burner
300: heat recovery
310: fluid supply port
320: fluid outlet
330: VOCs concentration meter
340: VOCs complex meter
400: catalytic reactor
410: damper
500: exhaust gas condenser
510: heat exchanger
520: supply water inlet
530: supply water outlet
540: feed water flow
600: stack
700: control unit

Claims (19)

a supply passage 100 including an air supply passage 110 through which air is supplied and a VOCs supply passage 100 through which VOCs (Volatile Organic Compounds) are supplied;
a flameless combustor 200 in which flameless combustion is performed by reacting air supplied from the supply passage 100 with VOCs;
a heat recovery device 300 positioned at a rear end of the flameless combustor 200 and communicating with the flameless combustor 200;
a catalyst reactor 400 positioned at a rear end of the heat recovery unit 300; and
An exhaust gas condenser 500 located at the rear end of the catalytic reactor 400; including,
system.
According to claim 1,
A compressor 130 located on the supply passage 100 to compress air and VOCs flowing into the supply passage 100; further comprising,
system.
According to claim 2,
A VOCs concentration meter 330 located at the rear of the flameless combustor 200 and at the front of the heat recovery device 300 and measuring the VOCs concentration; including,
system.
According to claim 3,
a VOCs complex meter 340 located at the rear end of the heat recovery device 300 and at the front end of the catalytic reactor 400 and measuring VOCs concentration, VOCs temperature, and VOCs flow rate; Including more,
system.
According to claim 4,
The catalytic reactor 400 includes first to nth catalytic reactors 400 (n is a natural number of 2 or more), and the first to nth dampers 410 are Each is located on the front end,
The control unit 700 opens and closes the first to nth dampers 410 according to the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs concentration and VOCs flow rate measured by the VOCs composite meter 340 and to control the rate
system.
According to claim 4,
The catalytic reactor 400 includes a 1X1 catalytic reactor 400 to an nXm catalytic reactor 400 (n is a natural number of 1 or more, m is a natural number of 1 or more), and the first damper 410 to m th damper ( 410) are positioned to correspond to the front ends of the 1X1 catalytic reactor 400 to 1Xm catalytic reactor 400, respectively,
The 1X1 catalytic reactors 400 to nXm catalytic reactors 400 are arranged in n rows located at the same height and m rows located in a row in the vertical direction, respectively,
The controller 700 controls the first damper 410 to m damper 410 according to the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs concentration and VOCs flow rate measured by the VOCs composite meter 340 to open and close and control the opening rate,
system.
According to claim 4,
The catalytic reactor 400 includes the 1X1 catalytic reactor 400 to the nX th catalytic reactor 400 (n is a natural number of 1 or more, m is a natural number of 1 or more), and the 1X1 damper 410 to the nX m damper ( 410) are positioned so as to correspond to the front end of the nXm catalytic reactor 400, respectively,
The 1X1 catalytic reactors 400 to nXm catalytic reactors 400 are arranged in n rows located at the same height and m rows located in a row in the vertical direction, respectively,
The controller 700 controls the 1X1 damper 410 to the nXm damper 410 according to the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs concentration and VOCs flow rate measured by the VOCs composite meter 340. to open and close and control the opening rate,
system.
According to claim 5,
The first to nth catalytic reactors 400 each include a catalyst having a different reaction temperature depending on the temperature,
The controller 700 controls the first to n catalytic reactors 400 including catalysts having the smallest difference between the measured VOCs temperature and the reaction temperature according to the VOCs temperature measured by the VOCs complex meter 340 Determines any one of the above, and controls to open any one of the first to nth dampers 410, and then the control unit 700 measures the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs composite meter According to the VOCs concentration and VOCs flow rate measured in 340, the opening rate of any one of the first to nth dampers 410 is controlled,
system.
According to claim 6,
The 1X1 catalytic reactor 400 to the nXm catalytic reactor 400 each include catalysts having different reaction temperatures depending on the temperature, but the same catalysts are located in n rows located at the same height,
The control unit 700 controls the 1X1 catalytic reactor 400 to the nXm catalyst including a catalyst having a small difference between the measured VOCs temperature and the reaction temperature according to the VOCs temperature measured by the VOCs complex meter 340. Among the reactors 400, the catalytic reactors 400 in row x located at the same height are determined (x is a natural number of 1 or more and less than or equal to n), and the xth catalytic reactor 400 located in front of the determined catalytic reactor 400 in row x is determined. After controlling the damper 410 to open, the controller 700 controls the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs concentration and VOCs flow rate measured by the VOCs complex meter 340, Controlling the opening rate of the x damper 410,
system.
According to claim 7,
The 1X1 catalytic reactor to the nXm catalytic reactor 400 (n is a natural number of 1 or more, m is a natural number of 1 or more) include catalysts having different reaction temperatures depending on the temperature,
The controller 700 controls the 1X1 catalytic reactor to the nXm catalytic reactor (400 ) Controls to open any one of the 1X1 damper 410 to nXm damper 410 located at the front end of any one of, and then the control unit 700 controls the VOCs measured by the VOCs concentration meter 330 Controlling the opening rate of any one of the 1X1 damper 410 to the nXm damper 410 according to the concentration and the VOCs concentration and VOCs flow rate measured by the VOCs composite meter 340,
system.
According to claim 10,
The control unit 700 determines that the difference between the measured VOCs temperature and the reaction temperature is small according to the VOCs concentration measured by the VOCs concentration meter 330 and the VOCs concentration and VOCs flow rate measured by the VOCs complex meter 340. A catalyst reactor 400 having a smaller temperature difference next to any one of the 1X1 catalytic reactor to the nXm catalytic reactor 400 including a catalyst is determined, and the 1X1 catalytic reactor 400 located at the front end of the corresponding catalytic reactor 400 is determined. Determines whether the other one of the damper 410 to nXm damper 410 is opened or closed and controls the opening rate of the other one of the 1X1 damper 410 to nXm damper 410,
system.
According to claim 4,
The control unit 700 is capable of controlling the damper 410 using any one or more of the VOCs concentration, VOCs flow rate, and VOCs temperature measured by the VOCs concentration meter 330 and the VOCs composite meter 340,
system.
According to claim 5,
The control unit 700 determines the remaining life of each of the catalytic reactors 400 and controls opening and closing of the first to nth dampers 410 according to the remaining life,
system.
According to claim 10,
The controller 700 determines the remaining life of each of the 1X1 catalytic reactor to the nXm catalytic reactor 400, and controls opening and closing of the 1X1 damper 410 to the nXm th damper 410 according to the remaining life. doing,
system.
According to claim 1,
The catalytic reactor 400 is a direct heating method,
system.
According to claim 4,
The catalytic reactor 400 is not a direct heating method,
system.
According to claim 1,
The exhaust gas condenser 500 further includes a heat exchanger 510 located inside,
The heat recovery unit 300,
A fluid supply unit 310 connected to one end of the heat exchanger 510 and supplying a low-temperature fluid; And
A fluid outlet 320 through which the high-temperature fluid generated by heating the fluid supplied from the fluid supply unit 310 is discharged; further comprising a
system.
According to claim 1,
The flameless burner 200 communicates with the additional fuel inlet,
system.
According to claim 1,
A stack 600 positioned at the rear end of the exhaust gas condenser 500; further comprising,
system.

Images