KR20220037100A - Apparatus for treating pollutant - Google Patents

Abstract

Provided is a pollutant processing apparatus for processing pollutants and the like in flue gas exhausted through a flue. According to the present invention, the pollutant processing apparatus comprises: a gas injection module disposed in a flue where exhaust gas flows; a first reducing agent tank in which a first reducing agent, which is sprayed as a gas phase through the gas injection module to process pollutants in the flue gas, is stored in a liquid state; a second reducing agent tank in which a second reducing agent made of a different material from the first reducing agent, which is sprayed as a gas phase through the gas injection module to process pollutants in the flue gas, is stored in a liquid state; a heterogeneous reducing agent vaporization module disposed among the first reducing agent tank, the second reducing agent tank, and the gas injection module to receive and vaporize at least one of the liquid first reducing agent and the liquid second reducing agent and provide the same to the gas injection module; and a first supply control pipe and second supply control pipe connected to the first reducing agent tank and the second reducing agent tank at different points of the heterogeneous reducing agent vaporization module to independently supply the liquid first reducing agent and the liquid second reducing agent to the heterogeneous reducing agent vaporization module. At least a part including a nozzle formed at an end of a heterogeneous reducing agent vaporization module side in each of the first supply control pipe and the second supply control pipe includes a cooling unit.

Description

Pollutant treatment apparatus {Apparatus for treating pollutant}

The present invention relates to a pollutant treatment device, and more particularly, to a pollutant treatment device for treating pollutants in exhaust gas exhausted through a flue in a thermal power plant or the like.

A power plant is installed as a power supply source for supplying electricity consumed on a daily basis. Although many new types of power generation methods have been introduced due to environmental conservation demands and the development of new technologies, thermal power plants that obtain electricity by burning fuel are also actively being used. In particular, thermal power plants are generated in the form of combined thermal power plants that reduce pollution and increase energy efficiency by applying a combination of gas turbine and steam turbine, or a combined heat and power plant that provides heat energy from the exhaust gas as a heat source for district heating and directly supplies heating as well as electricity. It has been used very actively.

In such a thermal power plant, a process of driving a turbine by burning combustible fuel is basically performed. The fuel is burned in the gas turbine to generate a large amount of flue gas (exhaust gas). Such flue gas contains pollutants generated by combustion reaction of fuel and high-temperature thermal reaction, etc., and is a cause of pollution, and therefore special treatment is required. In order to respond to this, various types of treatment facilities have been applied to conventional thermal power plants (eg, Korean Patent 10-1563079, etc.).

However, in practice, the exhaust gas is not treated satisfactorily with conventional treatment facilities. In particular, in combined cycle power plants, etc., the operation status of the turbine is frequently changed, and thus conditions such as the flow rate, speed, and temperature of the flue gas may change. For example, nitrogen oxides in the flue gas may be included in a relatively high concentration at the beginning of the start-up, but it was difficult to find an effective treatment method in a situation where the conditions such as the temperature in the flue were fluid, and therefore a technical alternative to this problem is required. .

Republic of Korea Patent Publication No. 10-1563079, (2015. 10. 30), Specification

The technical object of the present invention is to solve this problem, and to provide a pollutant treatment device for treating pollutants in exhaust gas exhausted through flue in thermal power plants, etc. In addition, through this, This is to enable the smooth treatment of contaminants such as nitrogen oxides.

The technical problems of the present invention are not limited to the problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

An apparatus for treating pollutants according to the present invention includes: a gas injection module disposed in a flue through which the exhaust gas flows; a first reducing agent tank in which a first reducing agent is injected into the gas phase through the gas injection module to treat the pollutants of the exhaust gas in a liquid phase; a second reducing agent tank which is sprayed in the gas phase through the gas injection module to treat the pollutants of the exhaust gas and stores a second reducing agent made of a material different from the first reducing agent in a liquid phase; A heterogeneous reducing agent provided to the gas injection module by receiving and vaporizing at least one of the liquid first reducing agent and the liquid second reducing agent between the first reducing agent tank and the second reducing agent tank and the gas injection module vaporization module; and the first reducing agent tank and the second reducing agent tank at different points of the heterogeneous reducing agent vaporization module, respectively, to convert the liquid first reducing agent and the liquid second reducing agent independently to the heterogeneous reducing agent vaporizing module and a first supply control pipe and a second supply control pipe for supplying, wherein each of the first supply control pipe and the second supply control pipe includes a nozzle formed at an end of the heterogeneous reduction agent gasification module side, at least a part of which is cooled includes wealth.

The heterogeneous reduction agent vaporization module includes a first vaporization part and a second vaporization part capable of exhibiting different temperatures therein, and the liquid first reducing agent and the liquid second reducing agent include the first vaporizing part and the second reducing agent. Each of the two vaporization units may be supplied and vaporized.

The pollutant treatment apparatus is a temperature control module for adjusting the temperature of the first vaporization unit and the second vaporization unit by sucking the exhaust gas in the flue and providing it to at least one of the first vaporization unit and the second vaporization unit. may include more.

The first vaporization unit and the second vaporization unit are connected in series to communicate with each other, and the exhaust gas is sequentially passed through the first vaporization unit and the second vaporization unit, and the first reducing agent in liquid form and the second vaporization in liquid form It may be heat-exchanged with at least one of the reducing agents.

The first vaporization part and the second vaporization part are made in the form of a chamber having an inlet and an outlet, respectively, and the first supply control pipe is connected from the inlet side of the first vaporization part to the first reducing agent tank The supply amount of the liquid first reducing agent supplied to the first vaporization unit is adjusted, and the second supply control pipe is connected to the second reducing agent tank from the inlet side of the second vaporization unit to the liquid phase supplied to the second vaporization unit. of the second reducing agent, the heterogeneous reduction agent vaporization module may further include a series connection pipe for communicating the outlet of the first vaporization unit and the inlet of the second vaporization unit.

The temperature control module is branched from the first vaporization unit and respectively connected to different points of the flue, and the point connected to the flue is relatively advanced in the inlet direction of the flue high-temperature side suction pipe, and a point connected to the flue The low-temperature-side suction pipe relatively retreated in the exit direction of the flue, and a suction control valve for controlling the intake amount of the exhaust gas may be disposed in each of the high-temperature suction pipe and the low-temperature suction pipe.

The pollutant treatment device is a control module for controlling the suction control valve to adjust the temperature of the exhaust gas introduced into the first vaporization unit to be less than the spontaneous ignition temperature of at least one of the first reducing agent and the second reducing agent may further include.

The control module, by varying the opening/closing amount of the suction control valve according to the supply amount of the first reducing agent supplied to the first vaporization unit, the temperature of the mixed gas of the exhaust gas introduced into the second vaporization unit and the first reducing agent can be maintained below the spontaneous ignition temperature of the second reducing agent.

The first reducing agent consists of an ammonia-based reducing agent, the ammonia-based reducing agent includes ammonia, the second reducing agent consists of a hydrocarbon-based reducing agent, and the hydrocarbon-based reducing agent includes at least one selected from ethanol and ethylene glycol, The pollutants treated by the first reducing agent and the second reducing agent may include nitrogen oxides in the exhaust gas.

The treatment gas containing at least one of the first reducing agent and the second reducing agent supplied from the heterogeneous reduction agent vaporization module may be injected through the gas injection module to a section having a temperature in the range of 200 to 500 ° C. .

The gas injection module may be formed of an injection grid connected to the heterogeneous reduction and gasification module and a processing gas supply pipe.

The gas injection module may be located in front of the denitration catalyst installed in the flue.

A plurality of heat exchange modules are formed in the flue, and at least one of the heat exchange modules may be located at a front end of the gas injection module.

According to the present invention, it is possible to very effectively treat pollutants in the exhaust gas generated and exhausted from a gas turbine or the like. In particular, pollutants such as nitrogen oxides that may be generated at the beginning of startup before an exhaust gas generating source such as a gas turbine reaches a certain load level can be treated very effectively through the present invention, and one or more reducing agents can be selectively and combined It is possible to more effectively remove contaminants by using In addition, it is possible to improve the thermal and structural efficiency of the device and increase the treatment effect of contaminants through the implementation of a simple supply structure that can supply such a reducing agent more smoothly.

1 is a block diagram of an apparatus for treating pollutants according to an embodiment of the present invention.
2 to 4 are diagrams showing the structure and operation method of the heterogeneous reduction agent gasification module in the pollutant treatment apparatus of FIG. 1 in more detail.
5 is a view showing a modified example of the heterogeneous reduction raising module.
6 is a view illustrating a state of use of the pollutant treatment apparatus of FIG. 1 .

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 disclosed below, but can be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete and common knowledge in the art to which the present invention pertains. It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the claims. Like reference numerals refer to like elements throughout.

Hereinafter, an apparatus for treating pollutants according to the present invention will be described in detail with reference to FIGS. 1 to 6 .

1 is a block diagram of a pollutant treatment apparatus according to an embodiment of the present invention, and FIGS. 2 to 4 are diagrams showing in more detail the structure and operation method of a heterogeneous reduction agent gasification module among the pollutant treatment apparatus of FIG. 1 and FIG. 5 is a view showing a modified example of the heterogeneous reduction agent vaporization module.

1 to 5 , the pollutant treatment apparatus 1 according to the present invention uses different types of reducing agents stored in each of the first reducing agent tank 10 and the second reducing agent tank 20 in the flue 2 It is formed in a structure provided by the disposed gas injection module 40 . Each different type of reducing agent is stored in the liquid phase in the first reducing agent tank 10 and the second reducing agent tank 20, but passes through the heterogeneous reducing agent vaporization module 30 and is changed to a gaseous phase and then injected into the gas injection module 40 Acts on pollutants in flue (2). In particular, the contaminant treatment device 1 is a separate supply pipe (first supply control pipe 110 and second supply control pipe 110) for independently supplying each of the liquid first reducing agent and the liquid second reducing agent to the heterogeneous reduction agent vaporization module 30. supply control pipe 210], and each supply pipe has a structure for cooling at least a portion including an end connected to the heterogeneous reduction agent vaporization module 30 (cooling parts 111a and 211a in FIGS. 2 to 5) Reference] is formed, so that unnecessary vaporization of liquid reducing agents due to heat or the like is prevented before the introduction of the heterogeneous reducing agent vaporization module 30, and each reducing agent is vaporized only in the state sprayed in the vaporization module as much as possible. Through this, the supply and vaporization process of the reducing agent can be performed more accurately and precisely controlled, and the effect on the supply pipe by heat, etc. can be minimized. In addition, it is possible to obtain the effect of facilitating injection of liquid reducing agents in the heterogeneous reducing agent vaporization module 30, and also to obtain the advantage of being able to more smoothly mix the different heterogeneous reducing agents when they are vaporized together.

In addition, as in one embodiment of the present invention, the heterogeneous reduction induced vaporization module 30 may include a first vaporization unit 31 and a second vaporization unit 32 that can represent different temperatures, so that each vaporization unit Different types of reducing agents can be effectively vaporized using different temperatures, and through this, one or more vaporized reducing agents can be selectively and complexly provided within the flue (2) to improve the pollutant treatment effect. In addition, it consists of a structure in which different types of reducing agents are vaporized in the heterogeneous reducing agent vaporization module 30 and then directly sprayed through the single gas injection module 40, minimizing the installation of unnecessary structures in the flue 2 and simplifying the device Also, maintenance can be performed conveniently.

The pollutant treatment apparatus 1 of the present invention is specifically configured as follows. The pollutant treatment device 1 includes a gas injection module 40 disposed in the flue 2 in which the exhaust gas flows, and the first reducing agent is injected into the gas phase through the gas injection module 40 to treat the pollutants of the exhaust gas. The first reducing agent tank 10 stored in the liquid phase is sprayed in the gas phase through the gas injection module 40 to treat the pollutants of the exhaust gas, and the second reducing agent tank containing the second reducing agent made of a material different from the first reducing agent in the liquid phase (20), between the first reducing agent tank 10 and the second reducing agent tank 20, and the gas injection module 40, at least one of the liquid first reducing agent and the liquid second reducing agent is supplied and vaporized to gas The first reducing agent tank 10 and the second reducing agent tank 20 at different points of the heterogeneous reduction agent vaporization module 30 provided by the injection module 40, and the heterogeneous reduction agent vaporization module 30, respectively, are connected to the liquid phase Including a first supply control pipe 110 and a second supply control pipe 210 for supplying the first reducing agent and the liquid second reducing agent to the heterogeneous reduction agent vaporization module 30 independently of each other, the first supply control pipe Each of the 110 and the second supply control pipe 210 has at least a portion including a nozzle (refer to 111 and 211 in FIGS. to 111a and 211a of FIG. 5) are included.

In one embodiment of the present invention, the heterogeneous reduction agent vaporization module 30 includes a first vaporization unit 31 and a second vaporization unit 32 that can exhibit different temperatures therein, and the liquid first reducing agent And the liquid second reducing agent may be respectively supplied to the first vaporization unit 31 and the second vaporization unit 32 to be vaporized. In addition, the pollutant treatment apparatus 1 sucks the exhaust gas in the flue 2 and provides it to at least one of the first vaporization unit 31 and the second vaporization unit 32 to provide the first vaporization unit 31 and the second vaporization unit 32 . It further includes a temperature control module 50 for adjusting the temperature of the vaporization unit 32, the first vaporization unit 31 and the second vaporization unit 32 are connected in series to communicate with each other, the exhaust gas is the first It sequentially passes through the vaporization unit 31 and the second vaporization unit 32 and may exchange heat with at least one of the liquid first reducing agent and the liquid second reducing agent. That is, the heterogeneous reducing agent vaporization module 30 uses the first vaporization unit 31 and the second vaporization unit 32 formed therein to vaporize each reducing agent at different temperatures, respectively, within the year (2) Temperature control of the first vaporization unit 31 and the second vaporization unit 32 by sucking the exhaust gas and providing it to the first vaporization unit 31 and the second vaporization unit 32 of the heterogeneous reduction gasification module 30 Not only this is possible, but the first reducing agent and the second reducing agent having different temperature characteristics can also be implemented in a structure that selectively and/or complexly vaporizes very appropriately. Hereinafter, the configuration and effect of the present invention will be described in more detail based on one embodiment of the present invention.

The gas injection module 40 is disposed in the flue 2 through which the exhaust gas flows. Briefly describing the flue, the flue 2 is a passage through which the flue gas flows, and may be connected to a flue gas generating source such as the gas turbine 3 . The flow direction of flue gas (refer to C of FIG. 6) in flue (2) is formed along the extension direction of flue (2), and flue gas is generated in gas turbine (3) and flows into flue (2), flue (2) ) exits. Therefore, the direction in which the gas turbine 3 is connected may be the inlet direction of the flue 2 , and the direction in which the exhaust gas exits to the opposite side may be the outlet direction of the flue 2 . The flue gas flows from the inlet direction to the outlet direction of the flue (2), and thus the front and rear ends in the flue (2) can also be defined. That is, the side located in the direction in which the exhaust gas flows can be defined as the rear end, and the side located in the direction opposite to the direction in which the exhaust gas flows relatively to it can be defined as the front end. A plurality of heat exchange modules may be formed in the flue 2 , and the heat exchange modules may be sequentially spaced apart from the inlet direction of the flue 2 in the outlet direction. For example, in the flue 2, the second heat exchange module 22 at the rear end of the first heat exchange module 21, the third heat exchange module 23 at the rear end of the second heat exchange module 22, the third The fourth heat exchange module 24 at the rear end of the heat exchange module 23 and the fifth heat exchange module 25 at the rear end of the fourth heat exchange module 24 are spaced apart from each other to form a structure in which they are sequentially arranged.

The flue (2) may also serve to recover the exhaust heat by using these heat exchange modules. Each heat exchange module may be a part of a heat recovery boiler including these heat exchange modules. Although not shown, the upper end and the lower end of each heat exchange module may be connected to each other, and a tank for storing and circulating high pressure steam or heat recovery fluid may be installed at the connecting portion. The heat exchange module sequentially circulates the fluid from the fifth heat exchange module 25 at the rearmost stage to the first heat exchange module 21 at the most front end to generate high-pressure steam. The temperature of the heat exchange module may be sequentially lowered from the first heat exchange module 21 toward the fifth heat exchange module 25 . In addition, the denitration catalyst 4 acting as a catalyst for the selective catalytic reduction reaction may be installed in the flue 2 , and the denitration catalyst 4 may be disposed between these heat exchange modules. The position of the gas injection module 40 can be set in relation to the structure in the flue (2). Preferably, the gas injection module 40 is located at the front end of the denitration catalyst (4) installed in the flue (2). and at least one of the heat exchange modules may be located at the front end of the gas injection module 40 . For example, the gas injection module 40 may be disposed between the first heat exchange module 21 and the denitration catalyst 4 as shown in FIG. A gaseous reducing agent can be sprayed.

Such a position of the gas injection module 40 may be formed at a point where the gaseous reducing agent and the exhaust gas contact each other smoothly and the reducing agent also reacts more effectively. In the present invention, the reducing agent includes the first reducing agent and the second reducing agent, and by providing them selectively or in combination within the year (2), the reduction reaction of the reducing agent alone and/or the catalysis of the above-described denitration catalyst (4) is selectively accompanied A denitration action of removing nitrogen oxides through a catalytic reduction reaction may proceed. The gas injection module 40 of the present invention more easily reduces nitrogen oxides including nitrogen dioxide, etc. generated at the initial stage of operation of the gas turbine 3 by injecting a reducing agent at the position as described above in the flue 2 . can be removed The gas injection module 40 is disposed as a single unit in the flue 2 as shown in FIG. 1 , and may be formed in a structure capable of effectively injecting a gaseous fluid. The gas injection module 40 may include, for example, an injection grid connected to the heterogeneous reduction raising module 30 and the processing gas supply pipe 410, and the injection grid is, for example, a grid arranged in a grid shape. A plurality of injection nozzles may be formed in the structure. However, the shape or structure of the gas injection module 40 does not need to be limited thereto, and the structure or shape can be freely changed to various types capable of smoothly injecting a gaseous fluid.

The first reducing agent tank 10 and the second reducing agent tank 20 are each independently arranged to separately store the liquid first reducing agent and the liquid second reducing agent, respectively. The first reducing agent stored in the first reducing agent tank 10 is injected into the gas phase through the gas injection module 40 to treat the pollutants of the exhaust gas, and the second reducing agent stored in the second reducing agent tank 20 is also a gas injection module ( 40) through the gas phase to treat pollutants in the exhaust gas. That is, after both the first reducing agent and the second reducing agent are vaporized as described above, they may be selectively or complexly supplied in the flue 2 through the gas injection module 40 formed as a single unit. However, the second reducing agent is different from the first reducing agent in that it is made of a different material, and accordingly, a difference may appear in the reaction proceeding within the year (2). there is. The first reducing agent tank 10 and the second reducing agent tank 20 have the first vaporization unit 31 of the heterogeneous reducing agent vaporization module 30 through the first supply control pipe 110 and the second supply control pipe 210, respectively. ) and the second vaporization unit 32 may be respectively connected.

The first reducing agent is made of an ammonia-based reducing agent, and the ammonia-based reducing agent may include ammonia (ammonia). In addition, the second reducing agent is made of a hydrocarbon-based reducing agent, the hydrocarbon-based reducing agent may include at least one selected from ethanol (Ethanol) and ethylene glycol (Ethylene glycol). The pollutants treated by the first and second reducing agents include nitrogen oxides in the exhaust gas, and thus, contaminants such as nitrogen oxides can be reduced and removed through the reduction reaction of the first and second reducing agents. there is. As described above, the first reducing agent and the second reducing agent may be selectively or combined through the gas injection module 40 to be injected in the flue (2), and after being injected, may be sufficiently mixed with the exhaust gas in the flue (2). Accordingly, sufficient contact with the exhaust is made, and the denitration action can proceed through a smooth reduction reaction at an appropriate temperature. For example, the second reducing agent consists of a hydrocarbon-based reducing agent and can act alone to reduce nitrogen dioxide in the flue gas to nitrogen monoxide, and the first reducing agent consists of an ammonia-based reducing agent to reduce the overall nitrogen oxides in the above-mentioned denitration catalyst (4) It can be removed by reduction by a selective catalytic reduction reaction accompanied by the catalysis of In the case of combining them, the treatment effect of nitrogen oxides can be further improved as described below. treatment effect may be obtained.

That is, in the present invention, the reducing agent can treat nitrogen oxides by itself, but can more effectively treat nitrogen oxides together with the denitration catalyst 4 . Therefore, it is not necessary to understand this reducing agent as being limited only to treating nitrogen oxides by catalytic action. In addition, treatment means that nitrogen oxides are reduced, and nitrogen oxides (NO _x ; NO, NO ₂ , N ₂ O, N ₂ O ₃ , N ₂ O ₄ , N ₂ O ₅ , etc.) are converted to nitrogen (N ₂ ). The reduction means that one nitrogen oxide (eg, NO ₂ ) is also reduced to another nitrogen oxide (eg, NO). More specifically, the reducing agent may be one or more selected from ammonia and urea, and the ammonia may be, for example, anhydrous ammonia (ammonia gas) pressurized and stored in a liquid state. These ammonia-based reducing agents can be treated by reducing nitrogen oxides to nitrogen (N ₂ ) mainly by the accelerating action of the denitration catalyst 4 . In addition, the hydrocarbon-based reducing agent may be one or more selected from ethanol, ethylene glycol, and glycerin, and these hydrocarbon-based reducing agents mainly reduce yellow smoke by reducing nitrogen dioxide, which causes yellow smoke, to nitrogen oxide (nitrogen monoxide). Nitrogen oxide can be treated. The hydrocarbon-based reducing agent may be one that reduces yellow smoke without accelerating action by a catalyst. In addition, as nitrogen dioxide in the exhaust gas is reduced to nitrogen monoxide by the hydrocarbon-based reducing agent, the nitrogen dioxide content in the exhaust gas is reduced, and the ammonia-based reducing agent is applied together with the hydrocarbon-based reducing agent, so that the denitration by the denitration catalyst can be performed more effectively. In particular, even when it is difficult to treat because the nitrogen dioxide content in the exhaust gas generated at the initial stage of driving a gas turbine of a thermal power plant is high, it can be effectively treated. That is, the nitrogen dioxide/nitrogen monoxide ratio is reduced as a result of the reduction of nitrogen dioxide in the flue gas to nitrogen monoxide by a reducing agent (mainly a hydrocarbon-based reducing agent) even though the exhaust gas contains a high content of nitrogen dioxide and the nitrogen dioxide/nitrogen monoxide ratio shows a high value This is because the denitration reaction can be effectively carried out by the catalyst reaction by contacting the exhaust gas with the furnace reducing agent (mainly ammonia-based reducing agent) with the denitration catalyst.

On the other hand, in relation to the storage and supply of the reducing agent in a liquid phase before vaporization, the meaning of the liquid phase means that the reducing agent is dissolved and / Alternatively, it may mean including a dispersed state, and may mean including an aqueous phase. For example, as an example of an ammonia-based reducing agent, liquid ammonia and liquid urea may mean aqueous ammonia and urea water, respectively. In addition, since the denitration catalyst 4 is not limited as long as it can promote the reducing action of the reducing agent, various catalysts that can promote the reducing action of the hydrocarbon-based reducing agent as well as the ammonia-based reducing agent may be possible. Preferably, the denitration catalyst 4 may be a catalyst that promotes the reduction action of the ammonia-based reducing agent, and this catalyst may be, for example, a Selective Catalytic Reduction (SCR) catalyst, and the SCR catalyst is, for example, It may include a vanadium-based catalyst and the like.

The first reducing agent and/or the second reducing agent is injected into a specific section in the flue 2 in a gaseous state, so that nitrogen oxides such as nitrogen dioxide contained in the exhaust gas and discharged at the beginning of the start-up of the gas turbine 3 can also be effectively removed. It is preferable to spray the reducing agent at the following points so that the reaction proceeds effectively even at the beginning of the start-up and the denitrification action appears. That is, the treated gas containing at least one of the first reducing agent and the second reducing agent supplied from the heterogeneous reduction agent vaporization module 30 is in the flue 2 through the gas injection module 40. The temperature in the range of 200 to 500 ° C. can be sprayed to, and in such a temperature range, the reduction reaction by the first reducing agent and/or the second reducing agent is made more smoothly, so that nitrogen oxides can be effectively removed. In particular, by spraying a gaseous reducing agent in the corresponding temperature section, the processing efficiency of nitrogen dioxide, which is the cause of yellow smoke, can be maintained at a high level, and the overall denitrification by the selective catalytic reduction reaction can also proceed smoothly. In addition, in the temperature range, the first reducing agent and/or the second reducing agent maintains a gaseous state and is in sufficient contact with the exhaust gas, so that the overall treatment efficiency can be improved. This temperature section may overlap with the position of the gas injection module 40 in the above-mentioned year (2) in terms of location. It is possible to effectively treat nitrogen oxides and the like.

The heterogeneous reducing agent vaporization module 30 supplies at least one of a liquid first reducing agent and a liquid second reducing agent between the first reducing agent tank 10 and the second reducing agent tank 20 and the gas injection module 40 It receives and vaporizes and provides it to the gas injection module 40 . The heterogeneous reduction agent vaporization module 30 includes a first vaporization unit 31 and a second vaporization unit 32 that can exhibit different temperatures therein, and the liquid first reducing agent and the liquid second reducing agent are these agents. The first vaporization unit 31 and the second vaporization unit 32 may be respectively supplied and vaporized. The first vaporization unit 31 and the second vaporization unit 32 of the present invention may be structured in various ways in a configuration in which the temperature may be different from each other. For example, the first vaporization unit 31 and the second vaporization unit 32 do not necessarily have to be formed as separate physically divided spaces, and the first vaporization unit 31 and the second vaporization unit 32 are connected to one another in a single space. The vaporization part 32 may be formed. For example, the first vaporization unit 31 and the second vaporization unit 32 may be formed at different points in a single chamber (this will be described in more detail later), and as will be described later, the temperature of the flue gas In the case of controlling the exhaust gas passing through the single pipe, the exhaust gas passing through the single pipe sequentially exchanges heat with different parts of the pipe, and different points of the pipe can be formed at different temperatures. It may also be possible to form the second vaporization part 32 . In addition, in the case of controlling the temperature of the heterogeneous reduction raised vaporization module 30 in a different way without utilizing the exhaust gas in another embodiment, another form of the first vaporization unit 31 and the second vaporization unit 32 is configured accordingly. You may. The first vaporization unit 31 and the second vaporization unit 32 may be implemented in various ways within the limit capable of representing different temperatures.

The pollutant treatment device 1 sucks the exhaust gas in the flue 2 as described above and provides it to at least one of the first vaporization unit 31 and the second vaporization unit 32, thereby providing the first vaporization unit 31 and the second vaporization unit 32. It includes a temperature control module 50 for adjusting the temperature of the second vaporization unit 32, the first vaporization unit 31 and the second vaporization unit 32 are connected in series to communicate with each other, and the exhaust gas is the first It sequentially passes through the vaporization unit 31 and the second vaporization unit 32 and may form a structure in which heat exchange with at least one of a liquid first reducing agent and a liquid second reducing agent is achieved.

Specifically, the first vaporization unit 31 and the second vaporization unit 32 are chambers each having an inlet (see 31a and 32a in FIGS. 2 to 4) and an outlet (refer to 31b and 32b in FIGS. 2 to 4). is made in the form of, and the above-described first supply control pipe 110 is connected to the first reducing agent tank 10 from the inlet side of the first vaporization unit 31 to supply the liquid to the first vaporization unit 31. The supply amount of the first reducing agent is adjusted, and the above-described second supply control pipe 210 is connected to the second reducing agent tank 20 from the inlet side of the second vaporizing part 32 and supplied to the second vaporizing part 32 . The supply amount of the liquid second reducing agent can be adjusted. In addition, the heterogeneous reduction raised vaporization module 30 has a structure including a series connection pipe (refer to 33 in FIGS. 2 to 4) that communicates the outlet of the first vaporization unit 31 and the inlet of the second vaporization unit 32. Thus, a structure in which the first vaporization unit 31 and the second vaporization unit 32 in the form of a chamber are directly connected by a pipe can be implemented. Hereinafter, the temperature control module 50 will be described first, and the structure and action of the heterogeneous reduction agent vaporization module 30 and the supply structure of the liquid reducing agent having the aforementioned cooling structure will be described in more detail.

The temperature control module 50 may be formed in a structure including a plurality of conduits connected to the flue (2). The temperature control module 50 sucks the exhaust gas from the flue 2 and passes it through the first vaporization unit 31 and the second vaporization unit 32 of the heterogeneous reduction raised vaporization module 30, and the temperature of each vaporization unit can be adjusted. . The temperature control module 50 is branched from the first vaporization unit 31 of the heterogeneous reduction raised vaporization module 30 and is respectively connected to different points of the year (2), but the point connected to the year (2) is relatively year (2) ), the high-temperature side suction pipe 510 advanced in the inlet direction, and the low-temperature side suction pipe 520 at which the point connected to the flue 2 is relatively retracted in the exit direction of the flue 2, and the high-temperature side suction pipe 510 ) and suction control valves 510a and 520a for controlling the intake amount of exhaust gas in each of the low-temperature side suction pipe 520 may be respectively disposed. The suction control valves 510a and 520a may be formed in various ways, for example, including a damper for opening and closing a pipe. Specifically, the high-temperature side suction pipe 510 and the low-temperature side suction pipe 520 may be formed to share a part of the pipe, and thus may be configured to be divided from each other by branching from the first vaporization unit 31 . For example, the high-temperature side suction pipe 510 and the low-temperature side suction pipe 520 may share the merging part 500 that is a part of the conduit connected to the first vaporization part 31, and the merging part 500 and the first minute The base 501 may constitute the high-temperature side suction pipe 510 , and the merging part 500 and the second branching part 502 may be formed in a form constituting the low-temperature side suction pipe 520 . A circulation fan 530 for circulating the exhaust gas may be disposed at the junction 500 . However, it is not necessary to be limited as such, and the high-temperature side suction pipe 510 and the low-temperature side suction pipe 520 may be branched from each other in the first vaporization unit 31 and connected to different points of the flue 2 in any other form. can be deformed.

The connection point 511 at which the high temperature side suction pipe 510 is connected to the flue 2 is advanced in the inlet direction of the flue 2 as shown, and the low temperature side suction pipe 520 is connected to the flue 2 The connection point 521 is retreated in the exit direction of the flue 2 (the inlet direction and the outlet direction are described above). Therefore, if the high-temperature side suction pipe 510 is used, it is possible to suck the high-temperature exhaust gas that has just flowed into the flue 2 and has undergone little heat exchange, and if the low-temperature side suction pipe 520 is used, it passes through the flue 2 and the heat exchange proceeds. Relatively low temperature flue-gases can be inhaled. These are mixed while passing through the confluence part 500, etc. and supplied to the heterogeneous reduction agent vaporization module 30, so the amount of exhaust gas sucked through the high temperature side suction pipe 510 and the low temperature side suction pipe 520 is adjusted to finally achieve the heterogeneous reduction agent gasification It is possible to adjust the temperature of the exhaust gas supplied to the module 30 as desired. That is, by adjusting the intake control valves 510a and 520a formed in each of the high-temperature side suction pipe 510 and the low-temperature side suction pipe 520, the intake amount of each exhaust gas is adjusted, and through this, the exhaust gas flowing into the heterogeneous reduction gasification module 30 is You can change the temperature. Through this, at least one of the liquid first reducing agent and the liquid second reducing agent can be smoothly vaporized in the first vaporization unit 31 and the second vaporization unit 32 of the heterogeneous reduction agent vaporization module 30, It is also possible to control such that the temperature rises above the spontaneous ignition temperature. This will be described in more detail when explaining the operation process to be described later.

Hereinafter, the structure and action of the heterogeneous reducing agent vaporization module 30 and the supply structure of the liquid reducing agent in which the cooling structure is formed will be described in more detail with reference to FIGS. 2 to 5 . First, the basic structure and operation of this embodiment will be described with reference to FIGS. 2 to 4 , and based on this, a modified example of the heterogeneous reduction agent vaporization module 30 will also be described with reference to FIG. 5 . 2 to 4 , as described above, the heterogeneous reduction raised vaporization module 30 includes a first vaporization unit 31 and a second vaporization unit 32 therein. 2 to 4, the first vaporization unit 31 and the second vaporization unit 32 may be formed in the form of a chamber in which inlets 31a, 32a and outlets 31b, 32b are formed, respectively. The internal structure of the heterogeneous reduction raising module 30 may be formed in a form in which they are connected by a series connection pipe 33 . The series connection pipe 33 connects the outlet 31b of the first vaporization unit 31 and the inlet 32a of the second vaporization unit 32 to the second vaporization of the exhaust gas introduced into the first vaporization unit 31 . It may be formed as a conduit for flowing to the part 32 . At the outlet 32b of the second vaporization unit 32, a treatment gas supply pipe 410 connected to the above-described gas injection module (see 40 in FIG. 1) is formed, so that the vaporized first reducing agent and/or the second reducing agent is The included processing gas F may be directly supplied to the gas injection module 40 . The heterogeneous reduction vaporization module 30 may be formed in various shapes within the limit including the first vaporization part 31 and the second vaporization part 32, and the first vaporization part 31 and the second vaporization part ( 32) can also be implemented in various forms that can communicate through the series connection pipe (33).

The first supply control pipe 110 is connected to the first reducing agent tank (see 10 in FIG. 1 ) from the inlet 31a side of the first vaporizing part 31 as described above and stored in the first reducing agent tank 10 . A liquid first reducing agent (see FIGS. 2 and 4 A) may be supplied to the first vaporization unit 31 . In addition, the second supply control pipe 210 is also connected to the second reducing agent tank (refer to 20 in FIG. 1) from the inlet 32a side of the second vaporizing part 32 to the liquid stored in the second reducing agent tank 20. The second reducing agent (refer to B of FIGS. 3 and 4 ) may be supplied to the second vaporization unit 32 . Each of these first supply control pipe 110 and second supply control pipe 210 is a nozzle for injecting a liquid first reducing agent and a liquid second reducing agent to the end of the heterogeneous reduction agent vaporization module 30, respectively, as shown 111 and 211 are formed, and at least a portion including the nozzles 111 and 211 has a structure including cooling units 111a and 211a. The nozzles 111 and 211 may be formed, for example, at a connection portion where the first supply control pipe 110 and the second supply control pipe 210 are connected to the heterogeneous reduction raised vaporization module 30, and the heterogeneous reduction raised vaporization module (30) It is inserted into the end portion (eg, nozzle tip) may be exposed to the exhaust gas flow space or flow path inside the heterogeneous reduction gasification module 30 . That is, the nozzles 111 and 211 supply the liquid first reducing agent and the liquid second reducing agent to the high temperature region of the heterogeneous reduction agent vaporization module 30 to vaporize it. By using the bar cooling units 111a and 211a that can face the area, the reverse flow of heat from the heterogeneous reduction agent vaporization module 30 to each of the first supply control pipe 110 and the second supply control pipe 210 is prevented, and each By lowering the reducing agent below the vaporization temperature, it is possible to more effectively supply the liquid reducing agent into the heterogeneous reducing agent vaporization module 30 .

The cooling units 111a and 211a may be formed, for example, in a cooling jacket-like structure surrounding a flow path through which a liquid reducing agent flows. A space for accommodating or flowing a refrigerant may be formed inside the cooling units 111a and 211a. However, there is no need to be limited thereto, for example, by cooling the reducing agent in various ways, such as using an insulating material, to lower the temperature and to form the cooling units (111a, 211a) of another shape or structure that can be maintained in a liquid state. . The cooling units 111a and 211a may be formed in the nozzles 111 and 211 of the first supply control pipe 110 and the second supply control pipe 210, respectively, but do not need to be limited thereto. The tube 110 and the second supply control tube 210 may be extended to other parts to be formed. Through this structure, the cooling effect is improved to a desired level, and each of the first and second reducing agents is effectively injected into the first and second vaporization units 31 and 32 in the heterogeneous reduction agent vaporization module 30 . It can be kept in liquid form. Therefore, it is possible to prevent unnecessary vaporization of liquid reducing agents due to heat or the like before the introduction of the heterogeneous reducing agent vaporization module 30 and to vaporize each reducing agent only in the state sprayed in the heterogeneous reducing agent vaporization module 30 as much as possible, and through this, supply and It is possible to proceed more accurately and precisely control the vaporization process. In addition, through this, it is possible to obtain the effect of making it easier to inject liquid reducing agents into the heterogeneous reducing agent vaporization module 30, and when different heterogeneous reducing agents are vaporized together, various effects such as being able to mix them more smoothly can be obtained. there is.

The liquid first reducing agent and the liquid second reducing agent are first vaporized through each of the first supply control pipe 110 and the second supply control pipe 210 in which the cooling units 111a and 211a are formed. And it may be supplied to the second vaporization unit 32 to be vaporized. A temperature sensor 311 may be formed at a position corresponding to the first supply control tube 110 on the inlet 31a side of the first vaporization unit 31, and also on the inlet 32a side of the second vaporization unit 32. 2 The temperature sensor 321 may be formed at a position corresponding to the supply control pipe 210 to measure and control the temperature of the fluid introduced into the first vaporization unit 31 and the second vaporization unit 32, respectively. possible. The first supply control pipe 110 and the second supply control pipe 210 are respectively opened and closed by control valves (refer to 110a and 210a in FIG. 1 ) formed therein, for example, to be supplied to the first vaporization unit 31 . The supply amount of the first reducing agent and the second reducing agent supplied to the second vaporizing unit 32 can be adjusted.

The operation of the heterogeneous reduction agent vaporization module 30 according to this structure will be described as follows. The heterogeneous reduction agent vaporization module 30 receives a liquid first reducing agent (A) to the inlet 31a side of the first vaporization unit 31 through the first supply control pipe 110 as shown in FIG. It may be vaporized in the first vaporizing unit 31 to generate the treated gas F containing the first reducing agent. Specifically, the heterogeneous reduction raised gasification module 30 may receive the exhaust gas (C) sucked from the flue (refer to 2 in FIG. 1) through the above-described temperature control module (refer to 50 in FIG. 1), and it is the first vaporization unit In (31), by heat-exchanging with the liquid first reducing agent (A), it is possible to generate a treated gas (F) in which the exhaust gas and the gaseous first reducing agent are mixed. The generated processing gas F may be provided to the gas injection module (see 40 in FIG. 1 ) through the processing gas supply pipe 410 through the series connection pipe 33 and the second vaporization unit 32 . At this time, the second supply control pipe 210 may be closed, and the temperature control module 50 is the flow rate of the exhaust gas sucked into the high-temperature side suction pipe (see 510 in FIG. 1) and the low-temperature side suction pipe (see 520 in FIG. 1) described above. By adjusting the temperature of the exhaust gas (C) introduced into the first vaporization unit 31 can be adjusted. The temperature of the exhaust gas (C) introduced into the first vaporization unit 31 may be, for example, adjusted to a temperature higher than the vaporization temperature of the first reducing agent (A) and lower than the spontaneous ignition temperature.

In addition, the heterogeneous reduction agent vaporization module 30 is supplied with a liquid second reducing agent (B) to the inlet 32a side of the second vaporization unit 32 through the second supply control pipe 210 as shown in FIG. , may be vaporized in the second vaporizing unit 32 to generate the treated gas F containing the second reducing agent. Specifically, the heterogeneous reduction raised vaporization module 30 may receive the exhaust gas (C) sucked from the flue 2 through the above-described temperature control module 50, and it is the second vaporization unit 32 in the liquid phase. By heat-exchanging with the reducing agent (B), it is possible to generate a treated gas (F) in which the exhaust gas and the gaseous second reducing agent are mixed. The exhaust gas (C) may be supplied to the second vaporization unit 32 after passing through the first vaporization unit 31 and the series connection pipe 33 , and a processed gas (F) generated in the second vaporization unit 32 . may be provided to the gas injection module 40 through the processing gas supply pipe 410 . At this time, the first supply control pipe 110 may be closed, and the temperature control module 50 adjusts the flow rate of the exhaust gas sucked into the high temperature side suction pipe 510 and the low temperature side suction pipe 520, which is also the first vaporization. It is possible to adjust the temperature of the exhaust gas (C) introduced into the part (31). At this time, the temperature of the exhaust gas (C) introduced into the first vaporization unit 31 may be adjusted to, for example, a temperature higher than the vaporization temperature of the second reducing agent (B) and lower than the spontaneous ignition temperature.

On the other hand, the heterogeneous reduction raised vaporization module 30 is the inlet 31a side and the second of the first vaporization unit 31 through the first supply control pipe 110 and the second supply control pipe 210 as shown in FIG. A liquid first reducing agent (A) and a liquid second reducing agent (B) are simultaneously supplied to the inlet (32a) side of the second vaporizing unit 32, respectively, and in the first vaporizing unit 31 and the second vaporizing unit 32 By vaporization, a treated gas (F) containing both the first reducing agent (A) and the second reducing agent (B) may be generated. For example, the flue gas (C) is first supplied to the first vaporizing unit 31 to vaporize the liquid first reducing agent (A), and the resulting mixed gas (D) of the exhaust and the first reducing agent is again produced It may be supplied to the second vaporization unit 32 to vaporize the liquid second reducing agent (B). Through this, the treated gas F including both the first reducing agent and the second reducing agent may be finally generated in the second vaporizing unit 32 .

In particular, in this case, according to the supply amount of the liquid first reducing agent (A) supplied to the first vaporization unit 31, the temperature and supply amount of the exhaust gas (C) supplied by the temperature control module 50 can be changed correspondingly. and the temperature of the exhaust gas (C) introduced into the first vaporization unit 31 through it, and the mixed gas (D) of the exhaust gas and the first reducing agent introduced into the second vaporization unit 32 through the first vaporization unit 31 ) can be adjusted together. For example, the spontaneous ignition temperature of the second reducing agent (B) based on the temperature of the mixed gas (D) introduced into the second vaporization unit 32 based on the temperature sensor 321 measurement value of the second vaporization unit 32 It can be adjusted to less than (eg, 250 ℃ or more and less than 400 ℃, more specifically 320 ℃), and accordingly, when the temperature of the mixed gas D is adjusted, The temperature may also be determined.

At this time, the temperature of the exhaust gas (C) introduced into the first vaporization unit 31 may be adjusted to be less than the spontaneous ignition temperature of the first reducing agent. That is, from the supply amount of the liquid first reducing agent (A) supplied to the first vaporization unit 31, the thermal energy consumed by heat exchange in the first vaporization unit 31 and the resulting temperature decrease can be predicted, and in consideration of this, the flue gas ( By correspondingly changing the temperature and supply amount of C), the inlet temperature of the first vaporization unit 31 (that is, the temperature of the exhaust gas introduced into the first vaporization unit) is lower than the spontaneous ignition temperature of the first reducing agent at the same time as the second vaporization The inlet temperature of the part 32 (that is, the temperature of the mixed gas introduced into the second vaporization part) may be adjusted to be lower than the spontaneous ignition temperature of the second reducing agent. If necessary, it is also possible to more organically adjust the inlet temperature of each vaporization unit while also changing the supply amount of the liquid first reducing agent (A).

In particular, since the second reducing agent may include ethanol (which may be about 400° C.), etc., which has a relatively low spontaneous ignition temperature as a hydrocarbon-based reducing agent, the inlet temperature of the second vaporizing unit 32 for vaporizing it is relatively spontaneous. The temperature needs to be maintained significantly lower than the temperature of the first vaporizing unit 31 for vaporizing the first reducing agent containing ammonia (which may be about 651 ° C.), etc., which has a high temperature, and the inlet temperature of such through the above-described method or the like control can be achieved. Accordingly, for example, the inlet temperature of the second vaporization unit 32 is lower than the spontaneous ignition temperature of ethanol and the vaporization state is maintained at a temperature that can be maintained (eg, 250° C. or higher and less than 400° C., more specifically 320° C.) while maintaining , the inlet temperature of the first vaporization unit 31 can be controlled to maintain a higher temperature than that, but lower than the spontaneous ignition temperature of ammonia (eg, a temperature of 400° C. or higher and less than 651° C., more specifically 400° C.). The inlet temperature control of the first vaporization unit 31 and the second vaporization unit 32 in this way may be manually performed by an administrator who operates the device, but is automatically performed using the control module 60 or the like, as will be described later. It is also possible to do it with As such, while controlling the inlet temperature of the first vaporizing unit 31 and the second vaporizing unit 32, the liquid first reducing agent (A) and the liquid second reducing agent (B) are vaporized together to form the first and second reducing agents The processing gas F containing all of the reducing agent may be generated and provided to the gas injection module 40 through the processing gas supply pipe 410 . In this way, by using the heterogeneous reduction agent vaporization module 30, a treated gas F containing at least one of the first reducing agent and the second reducing agent is generated, and supplied to the gas injection module 40 to supply it within the year (2). It is possible to effectively remove contaminants such as nitrogen oxides.

On the other hand, the heterogeneous reduction-induced vaporization module 30 may be transformed into a structure in which the first vaporization unit 31 and the second vaporization unit 32 are formed in the single chamber 34 as shown in FIG. 5 . That is, the first vaporization unit 31 and the second vaporization unit 32 do not necessarily have to be formed separately as separate chambers, and may be formed to be located at different points in a single integrated chamber. In such a case, for example, the first vaporizing part 31 is formed on the inlet 34a side of the single chamber 34, and the second vaporizing part 32 is formed on the outlet 34b side of the single chamber 34, respectively. It can be configured to be formed, and through this, it is possible to form the first vaporization unit 31 and the second vaporization unit 32 respectively exhibiting different temperatures at different points in the inner space of the single chamber 34 integrated with each other. In this case, the first supply control pipe 110 and the second supply control pipe 210 may be connected to the single chamber 34 at different positions corresponding to the first vaporization unit 31 and the second vaporization unit 32, respectively. can

In this case, since the space between the first vaporization unit 31 and the second vaporization unit 32 separated from each other serves to communicate the first vaporization unit 31 and the second vaporization unit 32 with each other, the above-described series connection It can be seen that it corresponds to the tube 33 , so this structure is also substantially similar to or equivalent to the structure in which the first vaporization part 31 and the second vaporization part 32 are communicated with the series connection tube 33 . structure can be interpreted. Therefore, the above-described control can also be performed using this structure. However, the space communicating between the first vaporization unit 31 and the second vaporization unit 32 is expanded, so that a difference in the amount of fluid flow may occur, and accordingly, the first vaporization unit 31 and the second vaporization unit 32 ), the temperature gradient between As such, it is possible to form the heterogeneous reduction agent vaporization module 30 in another form as needed.

6 is a view illustrating a state of use of the pollutant treatment apparatus of FIG. 1 .

Hereinafter, an operation process of the entire pollutant treatment apparatus will be described in more detail with reference to FIG. 6 . The contaminant treatment apparatus 1 of the present invention may perform the above-described vaporization process of the reducing agent as illustrated in FIG. 6 . A liquid first reducing agent (A) is supplied from the first reducing agent tank (10), and a liquid second reducing agent (B) is supplied from the second reducing agent tank (20). The liquid first reducing agent (A) and the liquid second reducing agent (B) are first vaporized in the heterogeneous reduction agent vaporization module 30 along the first supply control pipe 110 and the second supply control pipe 210, respectively. 31 and the second vaporization unit 32 may be supplied. As described above, by adjusting the control valves 110a and 210a, etc., the supply amount of the liquid first reducing agent (A) and the liquid second reducing agent (B) can be changed, and only the first reducing agent is supplied to the heterogeneous reduction agent vaporization module 30 Alternatively, it is possible to supply only the second reducing agent, or supply both the first reducing agent and the second reducing agent. That is, although FIG. 6 shows that both the liquid first reducing agent (A) and the liquid second reducing agent (B) are supplied, it is not necessary to be limited as shown in the drawings, and as described above, the liquid first reducing agent (A) and / or a liquid second reducing agent (B) is selectively or complexly supplied to the heterogeneous reducing agent vaporization module 30 to vaporize it, and a treated gas (F) containing at least one of the first reducing agent and the second reducing agent is generated to produce a gas It can be provided as a spray module (40).

At this time, the temperature control module 50 divides the exhaust gas (C) in the flue 2 into the above-described high-temperature side suction pipe 510 and low-temperature side suction pipe 520 and sucks it, and then mixes it to adjust the temperature to an appropriate temperature. That is, the high-temperature exhaust gas (C1) sucked into the high-temperature side suction pipe 510 and the low-temperature exhaust gas (C2) sucked through the low-temperature side suction pipe 520 are mixed at the junction 500, etc. to control the temperature, and the heterogeneous reduction gasification module 30 can be provided as As described above, the exhaust gas (C) provided to the heterogeneous reduction-generated vaporization module 30 passes through the first vaporization unit 31 and the second vaporization unit 32, among the first and second reducing agents supplied to each vaporization unit. Heat exchange with at least one and through this, the treatment gas F containing at least one of the first reducing agent and the second reducing agent may be generated in the heterogeneous reduction agent vaporization module 30 . The generated processing gas F may be directly provided to the gas injection module 40 through the processing gas supply pipe 410 to be injected in the flue 2 .

The pollutant treatment apparatus 1 may automatically perform the above-described control of the inlet temperature through control using the control module 60 . That is, the pollutant treatment apparatus 1 controls the suction control valves 510a and 520a disposed in the high temperature side suction pipe 510 and the low temperature side suction pipe 520 to control the exhaust gas introduced into the first vaporization unit 31 . The control module 60 for adjusting the temperature of (C) to less than the spontaneous ignition temperature of at least one of the first reducing agent and the second reducing agent may be further included. The control module 60 may be configured to automatically open and close the suction control valves 510a and 520a by transmitting a control signal, and the suction control valves 510a and 520a are automatically operated according to the control signal. It may be formed in a form capable of electronic driving or the like. The control module 60 may be formed to include a kind of programmable computer device, and may be configured to be automatically controlled by loading an appropriate control program or the like. Through this, the temperature of the exhaust gas (C) introduced into the first vaporization unit 31 of the heterogeneous reduction agent vaporization module 30 in the process of vaporizing the reducing agent of FIGS. 2 to 4 is adjusted to at least one of the first reducing agent and the second reducing agent. It can be controlled to less than one auto-ignition temperature. For example, when only the first reducing agent is vaporized as in the process of FIG. 2 , the temperature of the exhaust gas C introduced into the first vaporizing unit 31 may be adjusted to be less than the spontaneous ignition temperature of the first reducing agent, FIG. When only the second reducing agent is vaporized as in the process of 3, the temperature of the exhaust gas C introduced into the first vaporizing unit 31 may be adjusted to be less than the spontaneous ignition temperature of the second reducing agent. In addition, when the first reducing agent and the second reducing agent are vaporized together as in the process of FIG. 4 , the temperature of the exhaust gas C introduced into the first vaporizing unit 31 is lower than the spontaneous ignition temperature of the first reducing agent as described above. while adjusting the temperature of the mixed gas of the exhaust gas and the first reducing agent introduced into the second vaporization unit 32 can be controlled to be maintained below the spontaneous ignition temperature of the second reducing agent.

That is, the control module 60 varies the opening and closing amount of the suction control valves 510a and 520a according to the supply amount of the first reducing agent supplied to the first vaporization unit 31, and is introduced into the second vaporization unit 32. It is possible to maintain the temperature of the mixed gas of the exhaust and the first reducing agent (refer to D of FIG. 4) below the spontaneous ignition temperature of the second reducing agent, and through this, as described above, the liquid product supplied to the first vaporizing unit 31 1 According to the supply amount of the reducing agent (A), the temperature and supply amount of the exhaust gas (C) supplied by the temperature control module 50 can be adjusted to match. Through this, the temperature of the exhaust gas (C) introduced into the first vaporization unit 31, and the mixed gas (D) of the exhaust gas and the first reducing agent introduced into the second vaporization unit 32 through the first vaporization unit 31 temperature can be adjusted together. The control module 60 is connected to the above-described temperature sensors 311 and 321 to receive respective measured values and perform control, for example, the mixed gas (D) introduced into the second vaporization unit 32 . Based on the measured value of the temperature sensor 321 formed in the second vaporization unit 32, the temperature of the second reducing agent (B) may be adjusted to be less than the spontaneous ignition temperature of the second reducing agent (B). Through this, when the temperature of the mixed gas (D) is set, the temperature of the exhaust gas (C) introduced into the first vaporization unit 31 may also be determined as described above.

In this way, while controlling the temperature of the exhaust gas (C) supplied to the heterogeneous reduction agent vaporization module 30, at least one of the first reducing agent and the second reducing agent can be vaporized, and the processed gas (F) generated through it can be used in the gas injection module Provided as (40), it can be sprayed within the year (2). The treated gas (F) injected by the gas injection module 40 contains at least one of the first reducing agent and the second reducing agent, and is supplied to the flue (2) in a gaseous state and smoothly mixed with the gaseous exhaust gas (C) It is possible to treat pollutants such as nitrogen oxides in the flue (2). In particular, as described above, the gas injection module 40 is disposed at a specific location in the year 2 and the temperature condition is within a specific range [for example, the range of 200 to 500 ° C.] By injecting , the reduction reaction by the first reducing agent and/or the second reducing agent is performed more smoothly even at the initial stage of driving when the gas turbine 3 is driven, and nitrogen oxides can be effectively removed. In particular, the treatment efficiency of nitrogen dioxide, which is the cause of yellow smoke, can be maintained at a high level by the reducing agent sprayed in the temperature section, and the overall denitrification action by the selective catalytic reduction reaction can also be smoothly performed. In this way, it is possible to effectively treat pollutants such as nitrogen oxides in the exhaust gas generated in the gas turbine 3 or the like.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing the technical spirit or essential features. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

1: Pollutant treatment unit 2: Year
3: gas turbine 4: denitrification catalyst
10: first reducing agent tank 20: second reducing agent tank
21: first heat exchange module 22: second heat exchange module
23: third heat exchange module 24: fourth heat exchange module
25: 5th heat exchange module 30: heterogeneous reduction evaporative module
31: first vaporization unit 32: second vaporization unit
31a, 32a, 34a: entrance 31b, 32b, 34b: exit
33: series connector 34: single chamber
40: gas injection module 50: temperature control module
60: control module 110: first supply control pipe
111, 211: nozzles 111a, 211a: cooling unit
110a, 210a: control valve 210: second supply control pipe
311, 321: temperature sensor 410: processing gas supply pipe
500: merging part 501: first branching part
502: second branch 510: high-temperature side suction pipe
520: low-temperature side suction pipe 511, 521: connection point
510a, 520a: suction control valve 530: circulation fan
A, B: first reducing agent, second reducing agent C, C1, C2: flue gas
D: Mixed gas F: Processed gas

Claims (13)

a gas injection module disposed in the flue in which the flue gas flows;
a first reducing agent tank in which a first reducing agent is injected into the gas phase through the gas injection module to treat the pollutants of the exhaust gas in a liquid phase;
a second reducing agent tank which is sprayed in the gas phase through the gas injection module to treat the pollutants of the exhaust gas, and a second reducing agent made of a material different from the first reducing agent is stored in a liquid phase;
A heterogeneous reducing agent provided to the gas injection module by receiving and vaporizing at least one of the liquid first reducing agent and the liquid second reducing agent between the first reducing agent tank and the second reducing agent tank and the gas injection module vaporization module; and
They are respectively connected to the first reducing agent tank and the second reducing agent tank at different points of the heterogeneous reducing agent vaporization module, and the liquid first reducing agent and the liquid second reducing agent are supplied to the heterogeneous reducing agent vaporizing module independently of each other Including a first supply control pipe and a second supply control pipe,
Each of the first supply control pipe and the second supply control pipe includes a nozzle formed at an end of the heterogeneous reduction agent and vaporization module, and at least a part of the contaminant treatment apparatus including a cooling unit. According to claim 1,
The heterogeneous reduction agent vaporization module includes a first vaporization part and a second vaporization part that can exhibit different temperatures therein, and the liquid first reducing agent and the liquid second reducing agent include the first vaporizing part and the second reducing agent A contaminant treatment device that is supplied and vaporized to each of the second vaporizers. 3. The method of claim 2,
The pollutant treatment apparatus further comprising a temperature control module for adjusting the temperature of the first vaporization unit and the second vaporization unit by sucking the exhaust gas in the flue and providing it to at least one of the first vaporization unit and the second vaporization unit . 4. The method of claim 3,
The first vaporization unit and the second vaporization unit are connected in series to communicate with each other, and the exhaust gas is sequentially passed through the first vaporization unit and the second vaporization unit, and the first reducing agent in liquid form and the second vaporization in liquid form A pollutant treatment device that is heat-exchanged with at least one of the reducing agents. 4. The method of claim 3,
The first vaporization part and the second vaporization part are made in the form of a chamber having an inlet and an outlet, respectively,
The first supply control pipe is connected to the first reducing agent tank from the inlet side of the first vaporization part to adjust the supply amount of the liquid first reducing agent supplied to the first vaporization part, and the second supply control pipe is connected to the first reducing agent tank. , connected to the second reducing agent tank from the inlet side of the second vaporization part to adjust the supply amount of the liquid second reducing agent supplied to the second vaporization part, the heterogeneous reduction agent vaporization module, the outlet of the first vaporization part and The pollutant treatment apparatus further comprising a series connection pipe communicating the inlet of the second vaporization unit. 5. The method of claim 4,
The temperature control module,
The high-temperature side suction pipe branched from the first vaporization unit and respectively connected to different points of the flue, and the point connected to the flue is relatively advanced in the inlet direction of the flue, and the point connected to the flue is relatively the point of the flue. A pollutant treatment apparatus comprising a low-temperature side suction pipe retracted in an outlet direction, wherein suction control valves for controlling an intake amount of the exhaust gas are respectively disposed in the high-temperature side suction pipe and the low-temperature side suction pipe. 7. The method of claim 6,
Contaminant treatment further comprising a control module for controlling the suction control valve to adjust the temperature of the exhaust gas introduced into the first vaporization unit to be less than the spontaneous ignition temperature of at least one of the first reducing agent and the second reducing agent Device. 8. The method of claim 7,
The control module, by varying the opening/closing amount of the suction control valve according to the supply amount of the first reducing agent supplied to the first vaporization unit, the temperature of the mixed gas of the exhaust gas introduced into the second vaporization unit and the first reducing agent A pollutant treatment device for maintaining the second reducing agent below the spontaneous ignition temperature. According to claim 1,
The first reducing agent consists of an ammonia-based reducing agent, and the ammonia-based reducing agent includes ammonia,
The second reducing agent consists of a hydrocarbon-based reducing agent, and the hydrocarbon-based reducing agent includes at least one selected from ethanol and ethylene glycol,
The pollutants treated by the first reducing agent and the second reducing agent include nitrogen oxides in the exhaust gas. According to claim 1,
The treatment gas containing at least one of the first reducing agent and the second reducing agent supplied from the heterogeneous reduction agent vaporization module is a pollutant sprayed in a section having a temperature in the range of 200 to 500° C. in the flue through the gas injection module processing unit. According to claim 1,
The gas injection module is a pollutant treatment device consisting of an injection grid connected to the heterogeneous reduction gasification module and a treatment gas supply pipe. According to claim 1,
The gas injection module is a pollutant treatment device located in front of the denitration catalyst installed in the flue. 13. The method of claim 12,
A plurality of heat exchange modules are formed in the flue, and at least one of the heat exchange modules is located at a front end of the gas injection module.

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