KR102348571B1 - Mist/vortex contact type smart removal device for nitrogen oxides in combustion gas consisting of cone-shaped ammonia water mist spraying and vortex in the bottom direction of combustion gas - Google Patents

Abstract

The present invention relates to a smart removal device for nitrogen oxide in combustion gas of a mist/vortex contact type formed by a vortex phenomenon in a lower end direction of cone-shaped ammonia water mist spray and combustion gas, which can create a safe working environment. The smart removal device of the present invention comprises: an air compressor module (100); an ammonia water supply pump module (200); an inlet pipe part (300); a combustion gas measurement sensor module (400); a mist/vortex contact type cyclone stirrer (500); a vane part (600); a twin mist nozzle module (700); a discharge pipe part (800); and a smart control part (900).

Description

Mist/vortex contact type smart removal device for nitrogen oxides in combustion gas consisting of cone-shaped ammonia water mist spraying and vortex in the bottom direction of combustion gas}

The present invention is installed in a combustion gas generator of a boiler and thermal power plant, and controls the injection amount of mist ammonia water according to the temperature of the combustion gas containing nitrogen oxide (Nox) and the content of nitrogen oxide (Nox), and the space of gravity fall and, the evaporation heat atmosphere by the stirring in the mist, the vortex contact type nitrogen oxide through a chemical reaction (No _x) vaporizing at 160 ~ 200 ℃ temperature mist of aqueous ammonia is the nitrogen oxides (Nox) in contact with the combustion gas and the vortex contains a It relates to a mist-vortex contact-type smart removal device for nitrogen oxides in combustion gas consisting of cone-shaped ammonia water mist spraying and vortex of combustion gas capable of removing nitrogen oxides from the combustion gas contained therein.

Selective Catalystic Reduction tower (SCR, hereinafter referred to as 'SCR') is a facility for efficiently removing nitrogen oxides (NOx) in combustion gas generated after incineration of various wastes or solid fuels.

In SCR, a catalyst for removing nitrogen oxides (NOx) is installed, and ammonia (NH3) is used as a reducing agent.

Ammonia, a reducing agent, is supplied in liquid form for ease of transport and storage, and in order to increase reactivity before input to SCR, it is diluted with combustion gas through an ammonia vaporizer to change the liquid state to a gaseous state before input to the SCR.

However, in order to vaporize the ammonia water, there are a number of control valves (CVs) and electrical instruments and measuring instruments for interlocking equipment, so the configuration is complicated and the installation cost is also high.

In order to solve this problem, as a prior art, a hybrid ammonia vaporizer using waste heat and a combustion gas nitrogen oxide removal device including the same have been proposed in Korean Patent Registration No. 10-2083892, but this is an ammonia water injection grid for the inflow of combustion gas. Since it is formed from the bottom to the top in the main duct, it is wide and does not spray over a long distance, so the stirring between the combustion gas and the ammonia water is not good, the nitrogen oxide removal rate according to the chemical reaction is lowered, and a separate catalytic reduction tower facility is added There was a problem in that the volume increased because it had to be installed as

In addition, there is no device that measures the nitrogen oxide (NOx) content contained in the combustion gas and controls the amount of ammonia water injected accordingly, so it depends on the operator's experience, which is a manual method. It increased the installation cost and operating cost of the entire flue gas nitrogen oxide removal device, and became a factor causing eye irritation and respiratory system problems.

Above all, to keep pace with domestic and foreign NOx emission regulations and carbon emission reduction, a smart control-type modularization device that can be easily applied and compatible with customized modules for various combustion gas generators such as boilers and thermal power plants has not yet been developed. .

Domestic Registered Patent Publication No. 10-2083892

In order to solve the above problems, in the present invention, the mist-vortex contact type cyclone agitator is formed in the shape of the upper and lower gorges, and in the inner space of gravity drop, the cone through the twin mist nozzle module Ammonia water mist in the shape of a mist is sprayed and a vortex is generated in the lower direction of the combustion gas through the vane, so that the misted ammonia water is well stirred with the combustion gas containing nitrogen oxide (Nox) that becomes a vortex by the vortex phenomenon. The chemical reaction rate can be increased by doing this, and the amount of mist ammonia water is controlled according to the temperature of the combustion gas containing nitrogen oxides (Nox) and the content of nitrogen oxides (Nox) under the control of the smart control unit, and the space of gravity fall and nitrogen Combustion gas containing nitrogen oxides (Nox) through chemical reaction by stirring in a mist-vortex contact type in a vaporization heat atmosphere that vaporizes mist ammonia water that is in vortex contact with combustion gas containing oxides at a temperature of 160~200℃ It can be controlled to remove nitrogen oxide from the inside, and air compressor module, ammonia water supply pump module, inlet pipe part, combustion gas measurement sensor module, mist-vortex contact type cyclone agitator, vane part, twin mist Nozzle module, exhaust pipe part, and smart control unit are modularized, and cone-shaped ammonia water mist spray that can be customized and easily applied to various combustion gas generators such as boilers and thermal power plants. An object of the present invention is to provide a smart removal device for nitrogen oxides in the mist-vortex contact type combustion gas.

In order to achieve the above object, the smart nitrogen oxide removal device in the mist-vortex contact-type combustion gas consisting of cone-shaped ammonia water mist spraying and vortexing in the bottom direction of the combustion gas according to the present invention is

It is installed in the combustion gas generator of a boiler and thermal power plant, and controls the amount of mist ammonia water sprayed according to the temperature of the combustion gas containing nitrogen oxide (Nox) and the content of nitrogen oxide (Nox), the space of gravity drop, and nitrogen _{Combustion containing nitrogen oxides (No x} ) through chemical reaction by stirring in a mist-vortex contact type in a vaporization heat atmosphere that vaporizes mist ammonia water that is in vortex contact with combustion gas containing oxides at a temperature of 160~200℃ This is achieved by being configured to remove nitrogen oxides in the gas.

More specifically, the mist-vortex contact type nitrogen oxide smart removal device in combustion gas is

An air compressor module 100 that is driven according to the control signal of the smart control unit and supplies air to one side of the twin mist nozzle module at a pressure of 8 to 9 bar;

The ammonia water supply pump module 200 that is driven according to the control signal of the smart control unit and supplies the ammonia water stored in the ammonia water storage tank to the other side of the twin mist nozzle module at a pressure of 6 to 10 bar;

An inlet pipe part 300 that introduces the combustion gas containing nitrogen oxide (Nox) generated from the combustion gas generator of a boiler and thermal power plant to the upper end of the head of the mist-vortex contact type cyclone agitator while guiding it;

Located on one side of the inlet pipe, NO _{x of NO, NO 2} in the combustion gas containing nitrogen oxide (Nox) flowing into the inlet pipe is measured through differential optical absorption spectroscopy (DOAS), A combustion gas measurement sensor module 400 for measuring the temperature and pressure of the combustion gas flowing in the inlet pipe, and

Formed in the shape of upper and lower gorges, cone-shaped ammonia water mist is sprayed through twin mist nozzle module in the internal space of gravity drop, and the bottom direction vortex of combustion gas through the vane the cause, the nitrogen oxide was stirred in the evaporation heat atmosphere with mist, vortex contact type nitrogen oxide through a chemical reaction of (Nox) vaporized in the combustion gases and the vortex contact 160 ~ 200 ℃ temperature mist of aqueous ammonia which contains the developer (No _x After removing nitrogen oxides from the combustion gas containing

Formed on the outlet of the inlet pipe part located at the upper part of the head of the mist-vortex contact type cyclone agitator, while forming a suction force in the inlet pipe part, _{the combustion gas containing the introduced nitrogen oxide (No x} ) forms a vortex to form a vortex at the bottom A vane portion 600 that diffuses in the direction,

It is formed in a rod shape along the longitudinal direction, and after primary mixing on the inner space of the nozzle edge with a combination of 8~9 bar pressure from the air compressor and 6~10 bar pressure from the ammonia water supply pump, the cone ( A twin mist nozzle module 700 for forming an ammonia water mist having an average particle size of 30 to 60 micrometers having a cone-shaped liquid film;

A discharge pipe 800 for discharging the combustion gas from which 60-80% of nitrogen oxides generated in the mist-vortex contact type cyclone agitator are removed and nitrogen gas to the outside;

Air compressor module, ammonia water supply pump module, inlet pipe section, combustion gas measurement sensor module, mist/vortex contact type cyclone agitator, vane section, twin mist nozzle module, and exhaust pipe section are connected to each other. While controlling the overall operation, the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator and the combustion gas containing nitrogen oxide (Nox) are transferred from the combustion gas measurement sensor module located on the inlet pipe part. (Nox) Controls the amount of ammonia mist sprayed according to the content (ppm), and the mist ammonia water that is in vortex contact with the combustion gas containing nitrogen oxide (Nox) through a mist-vortex contact type cyclone stirrer at a temperature of 160~200℃ It is composed of a smart control unit 900 that controls to remove nitrogen oxides from the combustion gas containing _{nitrogen oxides (No x} ) through a chemical reaction by stirring in a mist-vortex contact type in the vaporizing heat atmosphere to be vaporized. do.

As described above, in the present invention

First, the mist-vortex contact type cyclone agitator is formed in the shape of the upper and lower gorges, and in the inner space of gravity drop, cone-shaped ammonia water mist sprays through the twin mist nozzle module, and the vane By causing a vortex phenomenon in the lower direction of the combustion gas through the (Vane) part, the misted ammonia water and the combustion gas containing nitrogen oxide (Nox), which becomes a vortex by the vortex phenomenon, are well stirred, so that the chemical reaction rate is 70 compared to the existing one. It can be increased to ~80%, and for this reason, even without a catalyst, the nitrogen oxide (Nox) reduction efficiency can be improved by 1.5 to 3 times compared to the conventional one.

Second, the amount of mist ammonia water is controlled according to the temperature of the combustion gas containing nitrogen oxides (Nox) and the content of nitrogen oxides (Nox) under the control of the smart control unit, and the space of gravity fall and nitrogen oxides (Nox) are included Remove nitrogen oxide from combustion gas containing nitrogen oxide (Nox) through a chemical reaction by stirring in a mist-vortex contact type in a vaporization heat atmosphere that vaporizes mist ammonia water that is in vortex contact with the combustion gas at a temperature of 160~200℃ By spraying ammonia water that meets the standard, power consumption can be lowered to 40% or less compared to the existing one, and an automated and safe working environment can be created.

Third, the air compressor module, the ammonia water supply pump module, the inlet pipe section, the combustion gas measurement sensor module, the mist-vortex contact type cyclone agitator, the vane section, the twin mist nozzle module, the discharge pipe section, and the smart control unit are modularized It is easily applied to various combustion gas generators such as boilers and thermal power plants, so it has excellent compatibility and can improve national competitiveness by playing a leading role in the domestic and overseas carbon emission reduction market.

1 is a configuration diagram showing the components of a smart nitrogen oxide removal device 1 in a mist-vortex contact type combustion gas consisting of a cone-shaped ammonia water mist injection and a vortex phenomenon in the bottom direction of the combustion gas according to the present invention. ,
2 is a perspective view showing the components of a smart nitrogen oxide removal device 1 in a mist-vortex contact type combustion gas consisting of a cone-shaped ammonia water mist injection and a vortex phenomenon in the bottom direction of the combustion gas according to the present invention;
3 is a block diagram showing the components of an air compressor module according to the present invention;
4 is a block diagram showing the components of the ammonia water supply pump module according to the present invention;
5 is a block diagram showing the components of the combustion gas measurement sensor module according to the present invention;
6 is a block diagram showing the components of a differential absorption spectroscopy sensor unit according to the present invention;
7 is a perspective view showing the components of a differential absorption spectroscopy sensor unit according to the present invention;
8 is an internal cross-sectional view showing the components of the mist-vortex contact type cyclone stirrer according to the present invention;
9 is an overall cross-sectional view showing the components of a twin mist nozzle module according to the present invention;
10 is a perspective view showing the components of the nozzle edge part according to the present invention;
11 is an exploded perspective view showing the components of the nozzle edge part according to the present invention;
12 is a guide so that the cap holder is coupled to the nozzle edge mixing part among the components of the nozzle edge part according to the present invention, and the mixed ammonia water and air are ejected in the form of a cross (“+”) in the direction of the venturi nozzle. One embodiment showing what to do,
13 is an internal cross-sectional view showing the components formed in the nozzle edge part of the configuration of the twin mist nozzle module according to the present invention;
14 is a perspective view showing the components of a vane unit according to the present invention;
15 is a circuit diagram showing the components of a smart control unit according to the present invention;
16 is a mist-vortex contact type combustion gas smart removal device 1 according to the present invention between the combustion gas generator 2 of the boiler (firewood boiler) and the catalytic reduction tower facility 3 is installed interchangeably One embodiment showing that
Figure 17 is the force of gravity drop on the height of 6500mm to 7500mm (d1 + d2) from the vane part in the mist-vortex contact type cyclone stirrer according to the present invention (d1 + d2), the injection distance of 50cm to 160cm (d1 ) of 30 to 60 micrometers of ammonia water mist is diffused to 5900 mm to 7000 mm (d2) and stirred with combustion gas containing nitrogen oxides (Nox), which becomes a vortex by a vortex phenomenon, through a chemical reaction. One embodiment showing the removal of nitrogen oxides in the combustion gas containing nitrogen oxides (Nox),
18 shows the amount of ammonia water mist (Mist) sprayed according to the nitrogen oxide (Nox) concentration introduced at each space velocity when the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator is 160° C. NH3:NOx A graph showing the NOx removal efficiency in the mist-vortex contact type cyclone stirrer when the ratio is adjusted;
19 shows the amount of ammonia water mist (Mist) sprayed according to the nitrogen oxide (Nox) concentration introduced at each space velocity when the temperature of the combustion gas in the mist-vortex contact type cyclone agitator is 200° C. in the NH3:NOx ratio. A graph showing the NOx removal efficiency in the mist-vortex contact type cyclone stirrer when adjusted.

First, the twin mist nozzle module according to the present invention described in the present invention was invented after a long period of development and testing by the applicant "Insung Engineering", and it is possible to control the particle diameter of droplets by adjusting the air flow rate, , Compared to the conventional pressurized nozzle, it is possible to mist a large amount of ammonia water in detail, and because the spraying pressure is low as 3 to 4 bar, the power is low compared to the conventional nozzle injection device, and the spraying air (Air) It has the characteristic that it can be used as an existing pressurized nozzle if the supply is stopped.

The major difference between the present invention and the prior patent is

First, it is installed in the combustion gas generator of a boiler and thermal power plant to control the injection amount of mist ammonia water according to the temperature of the combustion gas containing nitrogen oxide (Nox) and the content of nitrogen oxide (Nox), and space and _{, It contains nitrogen oxides (No x} ) through a chemical reaction by stirring in a mist-vortex contact type in a vaporization heat atmosphere that vaporizes mist ammonia water that is in vortex contact with combustion gas containing nitrogen oxides at a temperature of 160 to 200 ° C. It is a point configured to remove nitrogen oxides from the combustion gas.

Second, a vane part is formed on the outlet side of the inlet pipe part at the top of the head part of the mist-vortex contact type cyclone agitator, passes through the inflow pipe part, and passes through the inflow pipe forming part, and is twin on the same line as the vane part. As the mist nozzle module is formed along the vertical longitudinal direction, the average particle size of 30 to 60 micrometers having a spray distance of 50 cm to 160 cm by the force of gravity falling on the height of 6500 mm to 7500 mm from the bottom to the vane part. As the ammonia water mist diffuses from 5900mm to 7000mm, the combustion gas containing nitrogen oxide (Nox), which becomes a vortex by vortexing, can be stirred well, so that the chemical reaction rate can be increased to 70-80% compared to the existing ones. And, for this reason, it is possible to improve the nitrogen oxide (Nox) reduction efficiency by 1.5 to 3 times compared to the conventional one without a catalyst.

Hereinafter, preferred embodiments according to the present invention will be described with accompanying drawings.

1 is a configuration diagram showing the components of a smart nitrogen oxide removal device 1 in a mist-vortex contact type combustion gas consisting of a cone-shaped ammonia water mist injection and a vortex phenomenon in the bottom direction of the combustion gas according to the present invention. 2 shows the components of a smart nitrogen oxide removal device 1 in a mist-vortex contact type combustion gas consisting of a cone-shaped ammonia water mist injection and a vortex phenomenon in the bottom direction of the combustion gas according to the present invention. It relates to the perspective view shown, which is installed in the combustion gas generator of a boiler and thermal power plant, and controls the injection amount of mist ammonia water according to the temperature of the combustion gas containing nitrogen oxide (Nox) and the content of nitrogen oxide (Nox), , in a space of gravity drop and in a vaporization heat atmosphere that vaporizes mist ammonia water that is in vortex contact with combustion gas containing nitrogen oxides (NOx) at a temperature of 160~200℃, stirs it in a mist-vortex contact type to conduct a chemical reaction (No _x ) is configured to remove nitrogen oxides in the contained combustion gas.

The mist-vortex contact type nitrogen oxide smart removal device 1 in combustion gas is more specifically, the air compressor module 100, the ammonia water supply pump module 200, the inlet pipe part 300, the combustion gas measurement sensor. It consists of a module 400, a mist-vortex contact type cyclone agitator 500, a vane part 600, a twin mist nozzle module 700, a discharge pipe part 800, and a smart control part 900.

First, the air compressor module 100 according to the present invention will be described.

The air compressor module 100 is driven according to the control signal of the smart control unit, and serves to supply air to one side of the twin mist nozzle module at a pressure of 8 to 9 bar.

This is to produce compressed air, store it at high pneumatic pressure, and supply it to the twin mist nozzle module. As shown in FIG. 3 , the compressor body 110 , the air tank 120 , the compressor head unit 130 , and the suction 140 , a regulator 150 , and a pressure gauge 160 .

Here, the compressor body 110 serves to protect and support each device from external pressure.

The air tank 120 serves to store compressed air.

The compressor head unit 130 is a place where a pump (cylinder) and a motor are configured, and when the power is turned on, the motor rotates and the air sucked by the piston movement of the cylinder starts to be compressed.

The inhaler 140 is a device for sucking the surrounding air, and serves to reduce noise during the suction process. It has a filter inside to filter out impurities when inhaling the surrounding air.

The regulator 150 is a pressure control device, and serves to help the user to use the compressed air by adjusting the pressure of the compressed air. Here, it is connected to the air inlet port of the twin mist nozzle module through the air supply pipe to supply air with a pressure of 8 to 9 bar toward the twin mist nozzle module. Then, the smart control unit is connected to one side of the input terminal, and is driven according to the control signal of the smart control unit.

The pressure gauge 160 serves to display the pressure of the compressed air in psi (psi) and Bar (bar), two pressure units.

Next, the ammonia water supply pump module 200 according to the present invention will be described.

The ammonia water supply pump module 200 is driven according to the control signal of the smart control unit, and serves to supply the ammonia water stored in the ammonia water storage tank to the other side of the twin mist nozzle module at a pressure of 6 to 10 bar.

As shown in FIG. 4 , it is composed of an ammonia storage tank 210 , an ammonia water supply pump 220 , a check valve 230 , and a switch for operation operation (HS: Hand Switch) 240 .

The ammonia storage tank 210 is formed in a cylindrical drum shape to store ammonia, and a Level Indicating Transmitter (LIT) is installed on a pipe line connected to one side of the ammonia water storage tank. Measure and deliver the ammonia water storage level stored in the ammonia water storage tank.

Here, the level indicating transmitter (LIT: Level Indicating Transmitter) serves to continuously measure the water level in the ammonia water storage tank and generate a 4-20mA DC signal proportional to the water level.

And, ammonia water is prepared by dissolving ammonia in water. 670 volumes of ammonia can be dissolved in 1 volume of water. Ammonia needs to be cooled down as it heats up when it dissolves in water.

It has a form in which NH3 ammonia molecules and H2O water molecules are bonded to each other by hydrogen bonds, and the melting point is -79.0°C. Molecules in the form of 2NH3+H2O are also present in ammonia water, and the melting point is -78.8°C.

The ammonia water supply pump 220 supplies the ammonia water stored in the ammonia water storage tank to the ammonia water supply port of the twin mist nozzle module at a pressure of 6 to 10 bar.

An ammonia water supply pipe is formed on one side of the output, and the ammonia water supply pipe is connected to the ammonia supply port.

Then, the smart control unit is connected to one side of the input terminal, and is driven according to the control signal of the smart control unit.

The check valve 230 is formed in plurality between the ammonia storage tank and the ammonia water supply pump, and is used to prevent the reverse flow of ammonia water in the piping line, which is used for suction and discharge of the ammonia water supply pump. It is attached to protect the ammonia water supply pump. In addition, when the ammonia water is transferred from the PIT (Pressure Indicating Transmitter), the fluid in the pipe line is prevented from escaping to facilitate the operation of the pump.

Here, the on-site pressure indicating transmitter (PIT: Pressure Indicating Transmitter) is a device that measures the pressure applied to the pipe line and generates a 4-20mA DC signal proportional to the pressure.

The driving operation switch (HS: Hand Switch) 240 generates a switch signal for driving operation, which is a driving operation switch (HS: Hand Switch) is pressed to transmit a driving signal.

Here, a switch for operation operation (HS: Hand Switch) is a switch operated by an operator and is used when driving with a conventional panel or DCS CRT keyboard.

Next, the inlet pipe 300 according to the present invention will be described.

The inlet pipe part 300 guides the combustion gas containing nitrogen oxide (Nox) generated from the combustion gas generator of the boiler and thermal power generation while introducing it toward the upper end of the head of the mist-vortex contact type cyclone agitator. .

It is composed of a "∩" type conduit pipe, with a thickness of 5t to 10t (mm), and is formed by selecting any one of a steel plate and an aluminum alloy plate.

That is, it is made of a closed structure, a boiler and a combustion gas generator of thermal power generation are connected to the inlet side, and a mist-vortex contact type cyclone agitator is connected to the outlet side.

Next, the combustion gas measurement sensor module 400 according to the present invention will be described.

The combustion gas sensor module 400 is positioned on one side portion inlet pipe, a differential absorption spectroscopy principle the NO _x of the NO, NO ₂ from the flue gas containing the nitrogen oxides (Nox) flowing into the inlet pipe portion (DOAS: Differential Optical Absorption Spectroscopy) and plays a role in measuring the temperature and pressure of the combustion gas flowing in the inlet pipe.

As shown in FIG. 5 , it consists of a differential absorption spectroscopy sensor unit 410 , a temperature sensor unit 420 , and a pressure sensor unit 430 .

The differential absorption spectroscopy sensor unit 410 measures the NO _{x content of NO, NO 2} in the combustion gas containing nitrogen oxide (Nox) flowing into the inlet pipe section using the differential optical absorption spectroscopy (DOAS) principle. It serves to measure through

As shown in Figs. 6 and 7, the sensor module body 411 of a "+" shape and a combustion containing nitrogen oxides (Nox) flowing into the inlet pipe are located on one side of the front end of the sensor module body. A suction pipe 412 for sucking the gas, a transfer pump 413 for transferring the combustion gas containing nitrogen oxide (Nox) that has sucked the suction pipe 412 to a straight optical measuring pipe, and an optical transmitter 413 and A straight optical measuring pipe 414 positioned between the reflectors to form a combustion gas containing nitrogen oxide (Nox) in a straight shape, and an LED positioned at one end of the straight optical measuring pipe to generate light toward the straight optical measuring pipe The light source 415, the optical transmitter 416 for transmitting the LED light of the LED light source to a point in the combustion gas containing nitrogen oxide (Nox) located in the straight optical measuring pipe, and the optical transmitter located on the opposite side of the same line and a reflector 417 that reflects light passing through a point in the combustion gas containing nitrogen oxide (Nox), and an optical receiver 418 that is located on one side of the optical transmitter and receives light reflected back from the reflector 418 And, the optical sensor unit 419 that measures the light received through the optical receiver through differential optical absorption spectroscopy (DOAS), and the remaining combustion gas containing nitrogen oxide (Nox) is introduced again Consists of a discharge pipe (419a) for discharging toward the conduit section. At this time, the optical sensor unit is connected to the smart control unit.

Here, differential optical absorption spectroscopy (DOAS) is widely used to detect various types of trace gas substances in the atmosphere. Basically, when light passes through a certain medium, absorption occurs depending on the wavelength. use

The optical sensor unit using the differential absorption spectroscopy principle measures _{NO, NO 2} in the combustion gas containing nitrogen oxide (Nox) existing within a distance belonging to the light transmission region.

That is, by using a white light source to emit parallel light into the combustion gas flowing in the inlet pipe and detecting the returned light by a reflector, NO, NO _{2 having absorption bands in the ultraviolet and visible light regions using differential absorption spectroscopy} to determine the quantitative concentration.

The temperature sensor unit 420 serves to measure the temperature of the combustion gas flowing in the inlet pipe. The smart control unit is connected to one side of the output terminal.

The pressure sensor unit 430 serves to measure the pressure of the combustion gas flowing in the inlet pipe. The smart control unit is connected to one side of the output terminal.

Next, a mist-vortex contact type cyclone stirrer 500 according to the present invention will be described.

The mist-vortex contact type cyclone agitator 500 is formed in the shape of the upper and lower gorges, and in the inner space of gravity drop, cone-shaped ammonia water mist injection through the twin mist nozzle module and , Mist and vortex contact in the vaporization heat atmosphere, which causes a downward vortex of combustion gas through the vane and vaporizes mist ammonia water that is in vortex contact with combustion gas containing nitrogen oxides at a temperature of 160~200℃ After removing nitrogen oxides from the combustion gas containing _{nitrogen oxides (No x} ) through a chemical reaction by stirring in the do.

As shown in FIG. 8, this is made in the shape of an upper and lower gorge, a stirring main body 510 that forms a gravity drop space is formed, and an inlet pipe is installed at the upper end of the head of the stirring main body. Forming part 520 is formed, and mist and vortex contact type in a vaporization heat atmosphere that vaporizes mist ammonia water in vortex contact with combustion gas containing nitrogen oxide (Nox) at the bottom of the stirring body at a temperature of 160 to 200 ° C. _{A by-product dust collecting unit 530 for collecting water (H 2} O) and nitrogen gas (N ₂ ), which are by-products remaining after chemical reaction by stirring, is formed, and a discharge pipe 800 is installed at the upper end of the by-product dust collecting unit 530 . A furnace forming part 540 is formed, and a vibrator part 550 is formed at the upper end of the discharge pipe forming part 540 to generate vibration to induce a by-product remaining after chemical reaction toward the dust collecting part, and a stirrer on one side of the inner space. A temperature sensor unit 560 for agitator for sensing the internal temperature of the body is formed, and a pressure sensor unit 570 for agitator for sensing the internal pressure of the agitator body is formed on one side of the temperature sensor unit for agitator. The vibrator unit 550 is driven by receiving a control signal from the smart control unit connected to the smart control unit on one side of the output terminal.

Here, as shown in FIG. 8 , the shape of the upper and lower gorges means that the upper and middle portions have a wide space, and a space that becomes narrower like a funnel toward the lower end is formed.

The temperature of the inner space of the mist-vortex contact-type cyclone stirrer measured by the temperature sensor unit 560 for the stirrer is controlled through the inflow of combustion gas introduced into the mist-vortex contact-type cyclone stirrer. The temperature at this time is 160 ~ 200 ℃.

And, a vane part 600 is formed on the outlet side of the inflow pipe part, passes through the inflow pipe part 300, passes the inflow pipe forming part 520, and is on the same line as the vane part 600 The twin mist nozzle module 700 is formed along the vertical longitudinal direction, and the combustion gas from which 60 to 80% of nitrogen oxide has been removed and the exhaust pipe 800 for discharging nitrogen gas are included on one side of the upper end of the by-product dust collection part. is formed

In addition, as shown in FIG. 8, between the flow path part and the head of the mist-vortex contact type cyclone stirrer, the channel (100×50×5T) is not shaken by external pressure and has sealing properties. ×7.5T) (511) is formed, a check plate (4.5T) (512) is formed at the top of the channel, and a Rock Wool (100t) (513) is filled between the check plate and the channel. A "L"-shaped angle (100×100×7T) 514 is formed to prevent and reinforce a phenomenon between the check plate and the channel from sagging by external pressure.

The stirring main body is supported by a support frame so as to be positioned in a vertical upright structure without being shaken by external pressure.

And, the stirring main body is formed with a _{height of 6500mm to 7500mm (d 1} +d ₂ ) from the bottom surface to the vane part. Here, the reason for forming a height of 6500mm to 7500mm from the bottom surface to the vane is 6500mm or less, the distance between the ammonia water mist and the combustion gas containing nitrogen oxide (Nox), which becomes a vortex due to the vortex phenomenon, and the distance of gravity drop is short, agitation does not occur well, and this causes a problem that the chemical reaction rate is lowered and the nitrogen oxide reduction efficiency is lowered. The length of the pipe and the ammonia water supply pipe also increases, and the air pressure of the air compressor module needs to be adjusted again, which causes a problem that the installation period is long. It is most preferable to be

In this way, a vane part is formed on the outlet side of the inflow pipe part at the upper end of the head part of the stirring main body according to the present invention, passes through the inflow pipe part, passes the inflow pipe formation part, and is on the same line as the vane part and twin mist nozzle As the module is formed along the vertical longitudinal direction, as shown in FIG. 17, the height from the vane part to the bottom surface is 6500mm to 7500mm (d ₁ +d ₂ ) by the force of gravity drop, 50cm to 160cm the minute range (d ₁₎ an average particle of 30 to 60 while the ammonia water mist (mist) micrometer diffused to 5900mm ~ 7000mm (d ₂₎ combustion containing the vortex phenomenon of nitrogen oxides (Nox) where the vortex gas has and Stirring can be made well, and the chemical reaction rate can be increased to 70 to 80% compared to the conventional one, and for this reason, the nitrogen oxide (Nox) reduction efficiency can be improved by 1.5 to 3 times compared to the conventional without a catalyst.

Next, through the mist-vortex contact type cyclone stirrer according to the present invention, cone-shaped ammonia water mist is sprayed on the inner space of gravity drop, and a vortex phenomenon is caused in the lower direction of the combustion gas, so that nitrogen oxides (Nox) are A process in which a chemical reaction occurs by stirring in a mist-vortex contact type in a vaporization heat atmosphere in which the mist ammonia water that is in vortex contact with the combustion gas is vaporized at a temperature of 160 to 200 ℃ can be expressed as Equations 1,2,3.

Here, NO represents nitrogen _{monoxide among nitrogen oxides (No x} ), and when the ammonia water mist is sprayed, NH3 ammonia molecules and O ₂ oxygen molecules are combined with each other to cause a chemical reaction in an ionized environment in which oxygen is present.

Here, NO ₂ represents nitrogen dioxide among nitrogen oxides (No _x ), and when spraying ammonia water mist, it is ionized and _{only NH 3} ammonia molecules are bound to cause a chemical reaction.

Here, NO, NO ₂ represents nitrogen monoxide and nitrogen dioxide among nitrogen oxides (No _x ), and when spraying ammonia water mist, it is ionized and _{only NH 3} ammonia molecules are combined to cause a chemical reaction.

As such, as expressed in Equations 1,2,3, after the chemical reaction, by-products of water (H ₂ O) and nitrogen gas (N ₂ ) are generated.

The by-products thus generated are collected in the by-product dust collecting part, or nitrogen gas (N ₂ ) of the by-products is discharged to the outside through the discharge pipe part.

Next, a description will be given of the vane unit 600 according to the present invention.

The vane part 600 is formed on the outlet of the inlet pipe part located at the upper end of the head of the mist-vortex contact type cyclone stirrer, and while forming a suction force in the inflow pipe part, the introduced nitrogen oxides (No _x ) It forms a vortex and diffuses the contained combustion gas in the lower direction.

As shown in FIG. 14, a cylindrical body 610, a plurality of rotary blades 620 are formed in the inner space of the body, and a rotary motor 630 is formed on the rotary shaft of the rotary blade.

Then, the smart control unit is connected to one side of the input terminal of the rotary motor, and is driven according to the control signal of the smart control unit.

A vane unit that causes the combustion gas to vortex downward, for example, is operated at an air volume of 1,500 to 4,000 m 3 /h.

Next, the twin mist nozzle module 700 according to the present invention will be described.

The twin mist nozzle module 700 is formed in a rod shape along the longitudinal direction, and is a combination of 8 to 9 bar pressure from an air compressor and 6 to 10 bar pressure from an ammonia water supply pump. After mixing, it serves to form an ammonia water mist with an average particle size of 30 to 60 micrometers having a cone-shaped liquid film on the outside of the nozzle.

As shown in FIG. 9 , a nozzle body 710 , an air passage unit 720 , and an ammonia water passage unit 730 are configured.

The nozzle body 710 is formed in a rod shape along the longitudinal direction to protect and support each device from external pressure.

As shown in FIG. 10, an air flow passage 720 is formed on one side of the inner space up to the nozzle edge portion 710a along the longitudinal direction, and an ammonia water passage is formed on one side of the air flow passage 720. A portion 730 is formed up to the nozzle edge portion 710a along the longitudinal direction.

Then, an air inlet port 711 is formed on one side of the head portion, and an ammonia water supply port 712 is formed on one side of the air inlet port.

Here, the air inlet port 711 is connected to the air supply pipe, the regulator of the air compressor module is connected.

Then, the ammonia water supply port 712 is connected to the ammonia water supply pipe, and is connected to the ammonia water supply pump.

The air flow passage 720 is formed up to the nozzle edge portion 710a in the longitudinal direction in the inner space of the nozzle body, and the air having a pressure of 8 to 9 bar introduced from the air compressor flows. plays a role

The ammonia water flow path part 730 is formed up to the nozzle edge part 710a in the longitudinal direction in the inner space of the nozzle body, and serves as a flow path through which ammonia water having a pressure of 6 to 10 bar introduced from the ammonia water supply pump flows.

The nozzle edge part 710a is a nozzle injection port, after first mixing air and ammonia water in the inner space, ammonia water mist having an average particle size of 30 to 60 micrometers having a cone-shaped liquid film on the outside of the nozzle plays a role in forming

11 and 12, it is composed of a nozzle edge mixing part 710a-1, a cap holder 710a-2, a venturi nozzle 710a-3, and a protective flange part 710a-4.

The nozzle edge mixing unit 710a-1 is a state in which the air flow path unit 720 and the ammonia water flow path unit 730 are connected, and the air introduced from the air flow path unit 720 and the ammonia water After first mixing the ammonia water introduced from the flow path, it plays a role of ejecting it in the form of a cross (“+”) in the direction of the venturi nozzle.

As shown in FIGS. 11 and 12, the ammonia water passage part 730 is formed in the center of the inner space, and the ammonia water comes out in the form of a cross ("+") at the edge end of the ammonia water passage part 730. The guiding crisscross head type target pin 710a-1a is formed to protrude, and an air flow passage 720 is formed on one side of the ammonia water flow passage 730, and the air flow passage 720 of the Six air injection holes 710a-1b are formed at the tip of the edge.

Here, the six air injection holes play a role of mixing while having a mixing radius in various directions with the ammonia water from which air is sprayed from six directions and comes out of the cross head type target pin (710a-1a).

As shown in FIGS. 11 and 12, the cross head type target pin (710a-1a) has a structure in which the head is blocked, and a hole is formed in the form of a cross (“+”) in the upper, lower, left, and right directions, and the Ammonia water comes out through the hole.

And, when the cap holder is coupled to the cross head type target pin of the nozzle edge mixing unit, as shown in FIGS. 12 and 13, it is ejected in the form of a cross (“+”) toward the venturi nozzle.

As shown in FIG. 12, the cap holder 710a-2 is coupled to and supported by the nozzle edge mixing unit, and the mixed ammonia water and air are ejected in the form of a cross (“+”) in the direction of the venturi nozzle. act as a guide to make it happen.

The venturi nozzle (710a-3) is coupled to the nozzle edge mixing unit while covering the cap holder, and the diameter is narrowed through the venturi nozzle formed at low pressure and high speed, a crisscross ("+) It plays a role in forming an ammonia water mist with an average particle size of 30 to 60 micrometers having a cone-shaped liquid film on the outside of the nozzle.

As shown in FIG. 13, a low speed of high pressure is formed in a place having a diameter D1, and a high speed of low pressure is formed in a place having a diameter d1, accelerated

The protective flange portion (710a-4) is formed in an annular shape, and serves to support the cap holder and the nozzle edge mixing portion by screwing them together so as not to be shaken by external pressure.

As such, the nozzle edge part 710a consisting of the nozzle edge mixing part 710a-1, the cap holder 710a-2, the venturi nozzle 710a-3, and the protective flange part 710a-4 is configured, so that the air ( Air) After first mixing the air introduced from the flow passage 720 and the ammonia water introduced from the ammonia water passage, it is ejected in the form of a cross (“+”) in the direction of the venturi nozzle, and from the venturi nozzle to the outside of the nozzle Ammonia water mist with an average particle size of 30 to 60 micrometers having a cone-shaped liquid film can be formed.

For this reason, it is possible to form an ammonia water mist having an average particle size of 30 to 60 micrometers having a cone-shaped liquid film on the outside of the nozzle, and a spray distance of 50 cm to 160 cm toward the lower end.

Here, the ammonia water mist having an average particle size of 30 to 60 micrometers having a cone-shaped liquid film on the outside of the nozzle, and a spray distance of 50 cm to 160 cm toward the bottom direction, as shown in FIG. 17, mist-vortex contact Formed in the inner space of the type cyclone agitator, and with the force of gravity fall, ammonia water mist with an average particle size of 30 to 60 micrometers with a spray distance of 50 cm to 160 cm spreads to 5900 mm to 7000 mm and becomes a vortex by a vortex phenomenon. It is formed to be well stirred with combustion gas containing nitrogen oxides (Nox).

Next, the discharge pipe 800 according to the present invention will be described.

_{The discharge pipe part 800 serves to discharge the combustion gas containing nitrogen oxide (No x} ) remaining after chemical reaction in the mist-vortex contact type cyclone stirrer, and nitrogen gas, which is a by-product after the chemical reaction, to the outside.

It is formed in the shape of a curved line.

The outside refers to the catalytic reduction tower facility (3), or the white smoke exhaust chimney (4).

And, the suction power of the discharge pipe section is generated by the suction motor of the external catalytic reduction tower facility (3) and the white smoke exhaust stack (4).

_{The combustion gas containing nitrogen oxides (No x} ) remaining after the chemical reaction is compared to the initial period when it is introduced into the mist-vortex contact-type cyclone stirrer through the inlet pipe section, and nitrogen oxides (No _x ) refers to the combustion gas from which 80% to 90% of the gas has been removed. The remaining nitrogen oxides (No _x ) 10 to 20% removal is made in the catalytic reduction tower facility (3).

Next, the smart control unit 900 according to the present invention will be described.

The smart control unit 900 includes an air compressor module, an ammonia water supply pump module, an inlet pipe part, a combustion gas measurement sensor module, a mist-vortex contact type cyclone agitator, a vane part, a twin mist nozzle module, an exhaust pipe part It is connected to and controls the overall operation of each device, and the temperature of the combustion gas introduced into the mist/vortex contact type cyclone agitator and the combustion gas containing nitrogen oxide (Nox) are measured on the inlet pipe part The amount of mist ammonia water is controlled according to the nitrogen oxide (Nox) content (ppm) transmitted from the sensor module, and the mist ammonia water is in vortex contact with the combustion gas containing nitrogen oxide (Nox) through the mist-vortex contact type cyclone stirrer. It serves to control the removal of nitrogen oxides from the combustion gas containing _{nitrogen oxides (No x} ) through a chemical reaction by stirring in a mist-vortex contact type in a vaporization heat atmosphere that vaporizes at a temperature of 160~200℃.

It consists of a microprocessor.

That is, as shown in FIG. 15 , the differential absorption spectroscopy sensor unit 410 of the combustion gas measurement sensor module is connected to one side of the input terminal, and among the combustion gas containing nitrogen oxide (Nox) flowing into the inlet pipe part The optical measurement data measured through the differential optical absorption spectroscopy (DOAS) of the NO _x content of NO, NO ₂ is input, and the temperature sensor unit 420 of the combustion gas measurement sensor module is located on the other side of the other input terminal. is connected, the temperature of the combustion gas flowing in the inlet pipe unit measured by the temperature sensor unit is input, and the pressure sensor unit 430 of the combustion gas measurement sensor module is connected to one side of another input terminal, and the pressure sensor unit measures The pressure of the combustion gas flowing in the inlet pipe is inputted, and the temperature sensor unit 560 for the stirrer of the mist-vortex contact type cyclone stirrer is connected to the other side of the other input terminal, and the stirrer sensed by the temperature sensor for the stirrer The internal temperature of the body is input, and the pressure sensor unit 570 for the agitator of the mist/vortex contact type cyclone agitator is connected to one side of the other input terminal, so that the internal pressure of the agitator body sensed by the pressure sensor unit for the agitator is is input, the regulator 150 of the air compressor module is connected to one side of the output terminal, and an output signal is output to supply air having a pressure of 8 to 9 bar toward the twin mist nozzle module, and ammonia water is supplied to the other side of the other output terminal The ammonia water supply pump 220 of the pump module is connected to output an output signal to supply ammonia water having a pressure of 6 to 10 bar toward the twin mist nozzle module, and the rotation motor 630 of the vane part on one side of the other output terminal. ) is connected to form a suction force in the inlet pipe, and output an output signal to the rotary motor to form a vortex to diffuse the combustion gas containing the introduced nitrogen oxide (Nox) in the lower direction, and another output terminal Mist and vortex contact type in a vaporization heat atmosphere in which the by-product dust collector 530 is connected to the other side and vaporizes the mist ammonia water that is in vortex contact with the combustion gas containing nitrogen oxides (Nox) at a temperature of 160 ~ 200 ℃ The output signal is output to the by-product dust collector to collect _{water (H 2} O) and nitrogen gas (N ₂ ), which are by-products remaining after chemical reaction by stirring with The vibrator unit 550 is connected, and is configured to generate vibration and output an output signal toward the vibrator unit to induce the remaining by-products after chemical reaction toward the dust collecting unit.

In the smart control unit, in the case of spraying ammonia water mist, the reaction occurs in the vaporization heat atmosphere in which the mist ammonia water that is in vortex contact with the combustion gas containing nitrogen oxide (Nox) is vaporized at a temperature of 160 ~ 200 ° C. A control signal is output to the ammonia water supply pump module so that ammonia water is supplied to the twin mist nozzle module according to the temperature sensing value.

That is, if the temperature is below or above the vaporization heat atmosphere, which vaporizes the mist ammonia water in vortex contact with the combustion gas containing nitrogen oxides at a temperature of 160 to 200 ° C, the ammonia water is not supplied to the ammonia water supply pump module. Only when the OFF signal is input and the vaporization heat atmosphere in which the mist ammonia water that is in vortex contact with the combustion gas containing nitrogen oxide is vaporized at a temperature of 160~200℃ is turned on so that the ammonia water is supplied to the ammonia water supply pump module On) signal is input.

In addition, in the smart control unit, the temperature of the combustion gas introduced into the mist-vortex contact type cyclone stirrer; and the combustion gas containing nitrogen oxide (Nox) is differential absorption spectroscopic measurement of the combustion gas measurement sensor module located on the inflow pipe part According to the nitrogen oxide (Nox) content (ppm) delivered from the sensor unit; the mist ammonia water injection amount control algorithm engine unit 910 for controlling the injection amount of the mist ammonia water through adjustment _{of the NH 3} :NO _{x injection ratio is included and configured.}

18 shows the amount of ammonia mist (Mist) sprayed according to the nitrogen oxide (Nox) concentration introduced at each space velocity when the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator is 160° C. NH ₃ : It is a graph showing _{the NO x} removal efficiency in the mist-vortex contact type cyclone agitator when the _{NO x ratio is adjusted.}

As can be seen from the graph, when the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator is 160°C, the chemical reaction rate at which the combustion gas containing ammonia water mist and nitrogen oxides (Nox) is well stirred. It appears in 60-70% of cases.

This shows that the chemical reaction rate is low because ammonia water mist and nitrogen oxide (Nox) reactions show a high chemical reaction rate at high temperature.

In addition, as shown in the graph of FIG. 18 , under the same nitrogen oxide (Nox) concentration condition, as the NH ₃ :NO _x injection ratio increases, the combustion gas containing ammonia water mist (Mist) and nitrogen oxide (No _{x ) is} It can be seen that the chemical reaction rate with good stirring is increased.

That is, when the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator is 160℃, as the NH ₃ :NO _x injection ratio increases from 0.8 to 1.2, nitrogen oxides (No _x ) and This is because the ammonia water mist that can react has increased.

Therefore, the mist of aqueous ammonia injection control algorithm engine unit according to the present invention, NH ₃ when the temperature of the combustion gas introduced into the mist, vortex contact type cyclone agitator 160 ℃: that ammonia water mist to maintain the NO _x injection ratio about 1.2 ( Mist) and nitrogen oxides (No _x ) are well stirred because the chemical reaction rate increases, so the NH ₃ :NO _x injection ratio is controlled to be maintained at about 1.2.

And, as shown in the graph of FIG. 18, when the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator is 160° C., the _{concentration of the combustion gas containing nitrogen oxide (No x} ) is changed from 200 ppm to 500 ppm. As it increases, it can be seen that the chemical reaction rate in which the combustion gas containing ammonia water mist (Mist) and nitrogen oxide (No _{x ) is well stirred increases.}

In the mist-vortex contact type cyclone agitator, _{the combustion gas containing nitrogen oxides (No x} ) has a density and spreads widely as it becomes a vortex by a downward vortex phenomenon, increasing the probability of stirring with ammonia water mist. Because.

Accordingly, in the mist ammonia water injection amount control algorithm engine unit according to the present invention, when the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator is 160° C., the _{concentration of the combustion gas containing nitrogen oxide (No x} ) is set to 500 ppm. Control the settings to be maintained.

19 shows the amount of ammonia water mist (Mist) injected according _{to the nitrogen oxide (No x} ) concentration introduced at each space velocity when the temperature of the combustion gas in the mist-vortex contact type cyclone agitator is 200 ° C. _{NH 3} : NO _It is a graph showing _{the NO x} removal efficiency in the mist-vortex contact type cyclone stirrer when the ratio is adjusted to x.

This means that when the temperature of the combustion gas in the mist-vortex contact type cyclone agitator increases from 160°C to 200°C, the chemical reaction rate at which the combustion gas containing _{ammonia water mist (Mist) and nitrogen oxide (No x) is well stirred is 70-80} It can be seen that the increase is about %.

This is because the temperature condition of 200° C. reached the activation temperature range of the chemical reaction in the vaporization heat atmosphere.

In addition, as shown in the graph of FIG. 19 , under the same nitrogen oxide (No _x ) concentration condition, as the NH ₃ :NO _x injection ratio increases, the combustion gas containing ammonia water mist (Mist) and nitrogen oxide (No _{x )} It can be seen that the chemical reaction rate with good stirring increases.

That is, when the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator is 200℃, as the NH ₃ :NO _x injection ratio increases from 0.8 to 1.2, nitrogen oxides (No _x ) and This is because the ammonia water mist that can react has increased.

Therefore, the mist of aqueous ammonia injection control algorithm engine unit according to the present invention, NH ₃ when the temperature of the combustion gas introduced into the mist, vortex contact type cyclone agitator 200 ℃: that ammonia water mist to maintain the NO _x injection ratio about 1.2 ( Mist) and nitrogen oxides (No _x ) are well stirred because the chemical reaction rate increases, so the NH ₃ :NO _x injection ratio is controlled to be maintained at about 1.2.

And, as shown in the graph of FIG. 19, when the temperature of the combustion gas introduced into the mist-vortex contact type cyclone stirrer is 200° C., the _{concentration of the combustion gas containing nitrogen oxides (No x} ) is changed from 200 ppm to 500 ppm. As it increases, it can be seen that the chemical reaction rate in which the combustion gas containing ammonia water mist (Mist) and nitrogen oxide (No _{x ) is well stirred increases.}

In the mist-vortex contact type cyclone agitator, _{the combustion gas containing nitrogen oxides (No x} ) has a density and spreads widely as it becomes a vortex by a downward vortex phenomenon, increasing the probability of stirring with ammonia water mist. Because.

Therefore, in the mist ammonia water injection amount control algorithm engine unit according to the present invention, when the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator is 200 ° C, the _{concentration of the combustion gas containing nitrogen oxides (No x} ) is set to 500 ppm. Control the settings to be maintained.

Through these results, the mist ammonia water injection amount control algorithm engine unit according to the present invention algorithmizes the table table as shown in Table 1 below, and sets the NH ₃ :NO _x injection ratio to control the mist ammonia water injection amount.

turn Temperature (℃) of combustion gas introduced into the mist-vortex contact type cyclone agitator Nitrogen oxide (Nox) content (ppm) delivered from the differential absorption spectroscopy sensor unit of the combustion gas measurement sensor module in which the combustion gas containing nitrogen oxide (Nox) is located on the inlet pipe part NH ₃ :NO _x injection ratio Chemical reaction rate (%) at which combustion gas containing ammonia water mist and nitrogen oxide (Nox) is stirred One 160 500 1.0 70 2 160 500 1.2 73 3 200 200 0.8 70 4 200 350 0.8 70 5 200 500 0.8 78 6 200 200 1.0 75 7 200 350 1.0 75 8 200 500 1.0 80 9 200 200 1.2 75 10 200 350 1.2 75 11 200 500 1.2 85

That is, in the mist ammonia water injection amount control algorithm engine part, the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator is 160°C, and the combustion gas containing nitrogen oxide (Nox) is located on the inflow pipe part. If the nitrogen oxide (Nox) content (ppm) delivered from the differential absorption spectroscopy sensor unit of the module is 500 ppm, the NH ₃ :NO _x injection ratio is adjusted to 1.0~1.2 to control the amount of mist ammonia water sprayed, and mist and vortex contact The temperature of the combustion gas introduced into the type cyclone agitator is 200°C, and the combustion gas containing nitrogen oxide (Nox) is transferred from the differential absorption spectroscopy sensor unit of the combustion gas measurement sensor module located on the inlet pipe part. (Nox) If the content (ppm) is 250 ~ 500ppm, NH ₃ : NO _x control the injection amount of mist ammonia water by adjusting the injection ratio to 0.8 ~ 1.2.

In this way, through the mist ammonia water injection amount control algorithm engine unit, the injection amount of the mist ammonia water is controlled according to the NO _{x content of NO, NO 2} in the combustion gas containing nitrogen oxides (Nox), and the combustion gas containing nitrogen oxides (Nox) Control to remove nitrogen oxides from combustion gas containing nitrogen oxides (Nox) through chemical reaction by stirring in a mist-vortex contact type in a vaporization heat atmosphere that vaporizes mist ammonia water in vortex contact with temperature of 160~200℃ By spraying ammonia water that meets the standard, installation and operating costs can be lowered to 40% or less compared to the existing ones, and a safe working environment can be created.

Here, the reference value is the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator and the differential absorption spectroscopic measurement sensor unit of the combustion gas measurement sensor module in which the combustion gas containing nitrogen oxide (Nox) is located on the inlet pipe portion. It refers to the nitrogen oxide (Nox) content (ppm) delivered from

Hereinafter, a detailed operation process of the smart nitrogen oxide removal device in the mist-vortex contact type combustion gas consisting of a cone-shaped ammonia water mist injection and a downward vortex phenomenon of the combustion gas according to the present invention will be described.

First, as shown in FIG. 16, between the combustion gas generator 2 of the boiler (firewood boiler) and the catalytic reduction tower facility 3, a mist-vortex contact type nitrogen oxide smart removal device 1 in combustion gas is installed is installed

That is, a mist-vortex contact type cyclone agitator is installed as a standard between a boiler, a combustion gas generator of a thermal power plant, and a catalytic reduction tower facility.

Then, based on the mist-vortex contact type cyclone agitator, an inlet pipe section and an outlet pipe section are installed. That is, the inlet side of the inlet pipe section is connected to the boiler and the combustion gas generator of thermal power generation, and the outlet side of the discharge pipe section is connected to the catalytic reduction tower facility.

Then, a vane unit is installed on the outlet side of the inflow pipe unit.

Then, the twin mist nozzle module passes through the inlet pipe section, passes through the inflow pipe forming section and on the same line as the vane section, is installed at the top of the head of the mist-vortex contact type cyclone stirrer along the vertical longitudinal direction.

Then, the air compressor module is connected to the air inlet port of the twin mist nozzle module through the air supply pipe and installed, and the ammonia water supply pump is connected to the ammonia water supply port of the twin mist nozzle module through the ammonia water supply pipe and installed.

Then, the smart control unit is connected to the air compressor module, the ammonia water supply pump module, the inlet pipe part, the combustion gas measurement sensor module, the mist-vortex contact type cyclone agitator, the vane part, the twin mist nozzle module, and the discharge pipe part and installed

Next, the installed air compressor module is driven according to the control signal of the smart control unit, and air is supplied to one side of the twin mist nozzle module at a pressure of 8 to 9 bar.

Next, the ammonia water supply pump module is driven according to the control signal of the smart control unit, and the ammonia water stored in the ammonia water storage tank is supplied to the other side of the twin mist nozzle module at a pressure of 6 to 10 bar.

Next, in the inlet pipe section, while guiding the combustion gas containing nitrogen oxide (Nox) generated from the combustion gas generator of the boiler and thermal power generation, it is introduced toward the upper end of the head of the mist-vortex contact type cyclone agitator.

Next, in the combustion gas measurement sensor module, NO _{x of NO and NO 2} in the combustion gas containing nitrogen oxide (Nox) flowing into the inlet pipe is measured through differential optical absorption spectroscopy (DOAS). After measuring the temperature and pressure of the combustion gas flowing in the inlet pipe, the measured sensing data is transmitted to the smart controller.

At this time, the smart control unit controls the injection amount of the mist ammonia water according to NO _x of NO, NO _{2 of the combustion gas containing nitrogen oxides (No x ).}

Next, as shown in FIG. 17, cone-shaped ammonia water mist injection through the twin mist nozzle module in the mist-vortex contact type cyclone agitator, and the bottom direction vortex phenomenon of the combustion gas through the vane unit this taking place, the nitrogen oxide was stirred in the evaporation heat atmosphere with mist, vortex contact type nitrogen oxide through a chemical reaction of (Nox) vaporized in the combustion gases and the vortex contact 160 ~ 200 ℃ temperature mist of aqueous ammonia, which includes (No _x) It removes nitrogen oxides from the combustion gas containing this. At this time, the smart control unit vaporizes the mist ammonia water that is in vortex contact with the combustion gas containing nitrogen oxide (Nox) through the mist-vortex contact-type cyclone stirrer at a temperature of 160~200℃. Controlled to remove nitrogen oxides from combustion gas containing _{nitrogen oxides (No x} ) through a chemical reaction by stirring.

That is, while forming a suction force in the inlet pipe section from the vane installed in the mist-vortex contact type cyclone stirrer, _{the combustion gas containing the introduced nitrogen oxide (No x} ) forms a vortex and diffuses in the lower direction. .

In the twin mist nozzle module, the high speed flow is concentrated at the nozzle edge by a combination of 8~9bar pressure from the air compressor and 6~10bar pressure from the ammonia water supply pump, and the cone is outside the nozzle. Ammonia water mist with an average particle size of 30 to 60 micrometers having a cone-shaped liquid film is formed.

During the chemical reaction of the mist-vortex contact type cyclone stirrer, the flow rate of ammonia water consumed is 684 ℓ/h, and the molecular ratio of ammonia/nitrogen oxide is 0.93.

And, when the nitrogen oxide concentration contained in the combustion gas introduced into the mist-vortex contact type cyclone agitator is 782-796 mg/㎥, in the internal space of gravity drop, ammonia water mist injection and combustion through the vane part A vortex phenomenon occurs in the lower direction of the gas, and the mist ammonia water that is in vortex contact with the combustion gas containing nitrogen oxides is stirred in a vaporization heat atmosphere at a temperature of 160~200℃ to be stirred in a mist-vortex contact type through a chemical reaction. The removed nitrogen oxides (No _x ) are 71 to 88 mg/m3, which all meet the environmental protection emission standards.

At this time, the nitrogen oxide (No _x ) removal efficiency is 88.9 to 91%, and the ammonia slip is 0.8 to 1.3 mg/m3, and without a catalyst, the nitrogen oxide (Nox) reduction efficiency is 1.5 times to 3 It can be improved by doubling.

Next, the combustion gas from which nitrogen oxides have been removed from the mist-vortex contact type cyclone agitator and nitrogen gas are discharged through the discharge pipe part of the lower part.

Finally, in the discharge pipe section, the combustion gas from which 60-80% of nitrogen oxides generated by the mist-vortex contact type cyclone agitator have been removed and nitrogen gas are discharged to a catalytic reduction tower facility or a white smoke exhaust chimney.

1: Mist/vortex contact type nitrogen oxide smart removal device in combustion gas
100: air compressor module
200: ammonia water supply pump module
300: inlet pipe part
400: flue gas measurement sensor module
500: Mist and vortex contact type cyclone agitator
600: Vane part
700: twin mist nozzle module
800: discharge pipe part
900: smart control

Claims (8)

It is installed in the combustion gas generator of a boiler and thermal power plant, and controls the amount of mist ammonia water sprayed according to the temperature of the combustion gas containing nitrogen oxide (Nox) and the content of nitrogen oxide (Nox), the space of gravity drop, and nitrogen _{Combustion containing nitrogen oxides (No x} ) through chemical reaction by stirring in a mist-vortex contact type in a vaporization heat atmosphere that vaporizes mist ammonia water that is in vortex contact with combustion gas containing oxides at a temperature of 160~200℃ In the mist-vortex contact type nitrogen oxide in combustion gas smart removal device consisting of cone-shaped ammonia water mist spraying and vortex in the bottom direction of the combustion gas, which is configured to remove nitrogen oxides from the gas,
The mist-vortex contact type nitrogen oxide smart removal device in combustion gas is
An air compressor module 100 that is driven according to the control signal of the smart control unit and supplies air to one side of the twin mist nozzle module at a pressure of 8 to 9 bar;
The ammonia water supply pump module 200 that is driven according to the control signal of the smart control unit and supplies the ammonia water stored in the ammonia water storage tank to the other side of the twin mist nozzle module at a pressure of 6 to 10 bar;
An inlet pipe part 300 that introduces the combustion gas containing nitrogen oxide (Nox) generated from the combustion gas generator of a boiler and thermal power plant to the upper end of the head of the mist-vortex contact type cyclone agitator while guiding it;
Located on one side of the inlet pipe, NO _{x of NO, NO 2} in the combustion gas containing nitrogen oxide (Nox) flowing into the inlet pipe is measured through differential optical absorption spectroscopy (DOAS), A combustion gas measurement sensor module 400 for measuring the temperature and pressure of the combustion gas flowing in the inlet pipe, and
Formed in the shape of upper and lower gorges, cone-shaped ammonia water mist is sprayed through twin mist nozzle module in the internal space of gravity drop, and the bottom direction vortex of combustion gas through the vane _{Nitrogen oxide (No x} ) through a chemical reaction by stirring in a mist-vortex contact type in a vaporization heat atmosphere that causes a phenomenon and vaporizes mist ammonia water that is in vortex contact with combustion gas containing nitrogen oxides (Nox) at a temperature of 160~200℃ After removing nitrogen oxides from the combustion gas contained therein, the combustion gas from which nitrogen oxides are removed and the nitrogen gas are discharged through the discharge pipe at the bottom of the mist-vortex contact type cyclone agitator 500 and,
Formed on the outlet of the inlet pipe part located at the upper part of the head of the mist-vortex contact type cyclone agitator, while forming a suction force in the inlet pipe part, _{the combustion gas containing the introduced nitrogen oxide (No x} ) forms a vortex to form a vortex at the bottom A vane portion 600 that diffuses in the direction,
It is formed in a rod shape along the longitudinal direction, and after primary mixing on the inner space of the nozzle edge with a combination of 8~9 bar pressure from the air compressor and 6~10 bar pressure from the ammonia water supply pump, the cone ( A twin mist nozzle module 700 for forming an ammonia water mist having an average particle size of 30 to 60 micrometers having a cone-shaped liquid film;
A discharge pipe 800 for discharging the combustion gas from which 60-80% of nitrogen oxides generated in the mist-vortex contact type cyclone agitator are removed and nitrogen gas to the outside;
Air compressor module, ammonia water supply pump module, inlet pipe section, combustion gas measurement sensor module, mist/vortex contact type cyclone agitator, vane section, twin mist nozzle module, and exhaust pipe section are connected to each other. While controlling the overall operation, the temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator and the combustion gas containing nitrogen oxide (Nox) are transferred from the combustion gas measurement sensor module located on the inlet pipe part. (Nox) Controls the amount of ammonia mist sprayed according to the content (ppm), and the mist ammonia water that is in vortex contact with the combustion gas containing nitrogen oxide (Nox) through a mist-vortex contact type cyclone stirrer at a temperature of 160~200℃ A smart control unit 900 that controls to remove nitrogen oxides from the combustion gas containing _{nitrogen oxides (No x} ) through a chemical reaction by stirring in a mist-vortex contact type in the vaporizing heat atmosphere to be vaporized is included. A mist-vortex contact type smart removal device for nitrogen oxides in combustion gas, which is characterized by cone-shaped ammonia water mist injection and vortex flow in the lower direction of the combustion gas.
delete According to claim 1, wherein the combustion gas measurement sensor module 400
A differential absorption spectroscopy sensor unit 410 that measures the NO _{x content of NO and NO 2} in the combustion gas containing nitrogen oxides (Nox) flowing into the inlet pipe through differential optical absorption spectroscopy (DOAS). )Wow,
A temperature sensor unit 420 for measuring the temperature of the combustion gas flowing in the inlet pipe unit, and
Cone-shaped ammonia water mist spraying, characterized in that it consists of a pressure sensor unit 430 for measuring the pressure of the combustion gas flowing in the inlet pipe part, mist-vortex contact type combustion consisting of a vortex phenomenon in the lower direction of the combustion gas Smart removal of nitrogen oxides in gas.
According to claim 1, wherein the mist-vortex contact type cyclone stirrer 500 is
The agitation main body 510 is formed in the shape of the upper and lower gorges to form a gravity drop space, and the inlet pipe forming part 520 in which the inlet pipe part is installed at the upper end of the head of the stirring main body is formed, Water, a by-product remaining after chemical reaction by stirring in a mist-vortex contact type in a vaporization heat atmosphere in which mist ammonia water that is in vortex contact with combustion gas containing nitrogen oxides (Nox) at the bottom of the stirring body is vaporized at a temperature of 160~200℃ A by-product dust collecting part 530 for collecting (H2O) and nitrogen gas (N2) is formed, and a discharge pipe forming part 540 in which the discharge pipe 800 is installed at the upper end of the by-product dust collecting part 530 is formed, and the discharge pipe A vibrator part 550 is formed at the top of the forming part 540 to induce a chemical reaction and remaining by-products toward the dust collecting part by generating vibration, and a temperature sensor part for agitator that senses the internal temperature of the stirring main body on one side of the internal space 560 is formed, and a cone-shaped ammonia water mist injection/combustion gas, characterized in that a pressure sensor part 570 for agitator for sensing the internal pressure of the agitator body is formed on one side of the temperature sensor part for agitator A mist-vortex contact type nitrogen oxide smart removal device in combustion gas with a downward vortex phenomenon.
According to claim 1, wherein the twin mist nozzle module (700)
A nozzle body 710 formed in a rod shape along the longitudinal direction to protect and support each device from external pressure;
An air flow passage 720 that is formed in the inner space of the nozzle body along the longitudinal direction to the nozzle edge portion 710a, and serves as a flow passage through which air having a pressure of 8 to 9 bar introduced from the air compressor flows. )Wow,
It is formed up to the nozzle edge part 710a in the longitudinal direction in the inner space of the nozzle body, and is composed of an ammonia water flow path part 730 that serves as a flow path through which ammonia water having a pressure of 6 to 10 bar introduced from the ammonia water supply pump flows. A smart removal device for nitrogen oxides in the mist-vortex contact type combustion gas consisting of cone-shaped ammonia water mist spraying and vortex flow in the downward direction of the combustion gas.
According to claim 5, wherein the nozzle edge portion (710a) is
In a state in which the air flow path unit 720 and the ammonia water flow path unit 730 are connected, the air introduced from the air flow path unit 720 and the ammonia water introduced from the ammonia water flow path unit are first mixed. Then, the nozzle edge mixing unit (710a-1) ejecting in the form of a cross (“+”) in the direction of the venturi nozzle,
A cap holder (710a-2) that serves as a guide so that the mixed ammonia water and air are ejected in the form of a cross (“+”) in the direction of the venturi nozzle while being coupled to and supported by the nozzle edge mixing unit (710a-2);
Through the venturi nozzle that is coupled to the nozzle edge mixing part while covering the cap holder, the diameter is narrowed and formed at low pressure and high speed, the ammonia water that is ejected in the form of a cross (“+”) is injected into the nozzle. A venturi nozzle (710a-3) for forming an ammonia water mist with average particles of 30 to 60 micrometers having a cone-shaped liquid film to the outside;
Cone-shaped ammonia water mist spraying, characterized in that it is formed in an annular shape and is composed of a protective flange part (710a-4) that fastens the cap holder and the nozzle edge mixing part by threaded coupling to support it not to be shaken by external pressure Mist and vortex contact type nitrogen oxide smart removal device in combustion gas made up of bottom direction vortex of combustion gas.
According to claim 1, wherein the smart control unit 900
The differential absorption spectroscopy sensor unit 410 of the combustion gas measurement sensor module is connected to one side of the input terminal, and the NO _{x content of NO and NO 2} in the combustion gas containing nitrogen oxide (Nox) flowing into the inlet pipe is differentially Optical measurement data measured through Differential Optical Absorption Spectroscopy (DOAS) is input, and the temperature sensor unit 420 of the combustion gas measurement sensor module is connected to the other side of the other input terminal, The temperature of the combustion gas flowing in the inlet conduit is input, and the pressure sensor unit 430 of the combustion gas measuring sensor module is connected to one side of the other input terminal, and the pressure of the combustion gas flowing in the inlet conduit measured by the pressure sensor unit is input. This is input, and the temperature sensor unit 560 for the agitator of the mist-vortex contact type cyclone stirrer is connected to the other input terminal, and the internal temperature of the stirrer body sensed by the temperature sensor for the stirrer is inputted, and another The pressure sensor unit 570 for the agitator of the mist/vortex contact type cyclone agitator is connected to one side of the input terminal, and the internal pressure of the agitator body sensed by the pressure sensor for the agitator is input, and the air compressor is located at one side of the output terminal. The regulator 150 of the module is connected to output an output signal to supply air having a pressure of 8 to 9 bar toward the twin mist nozzle module, and the ammonia water supply pump 220 of the ammonia water supply pump module to the other output terminal is connected It is connected to output an output signal to supply ammonia water having a pressure of 6 to 10 bar toward the twin mist nozzle module, and the rotation motor 630 of the vane part is connected to one side of another output terminal, and the suction force is applied to the inlet pipe part. While forming, an output signal is output to the rotary motor to form a vortex and diffuse the combustion gas containing the introduced nitrogen oxide (No _x ) in the lower direction, and a by-product dust collector 530 is connected to the other side of the other output terminal. In a vaporization heat atmosphere that vaporizes mist ammonia water that is in vortex contact with combustion gas containing nitrogen oxides (Nox) at a temperature of 160 to 200 ° C. The output signal is output to the by-product dust collecting part to collect water (H ₂ O) and nitrogen gas (N ₂ ), which are by-products, and the vibrator part (550) of the mist-vortex contact type cyclone stirrer on one side of the other output terminal. ) is connected, generating vibration and generating an output signal to the vibrator to induce the remaining by-products to the dust collecting part. A smart removal device for nitrogen oxides in the mist-vortex contact type combustion gas with a downward-facing vortex phenomenon.
According to claim 1, wherein the smart control unit 900
The temperature of the combustion gas introduced into the mist-vortex contact type cyclone agitator is 160°C, and the combustion gas containing nitrogen oxide (Nox) is from the differential absorption spectroscopic measurement sensor unit of the combustion gas measurement sensor module located on the inflow pipe part. If the delivered nitrogen oxide (No _x ) content (ppm) is 500 ppm, the NH ₃ :NO _x injection ratio is adjusted to 1.0~1.2 to control the amount of mist ammonia water sprayed, and combustion introduced into the mist-vortex contact type cyclone agitator The nitrogen oxide (Nox) content (ppm) delivered from the differential absorption spectroscopy sensor unit of the combustion gas measurement sensor module where the temperature of the gas is 200° C. and the combustion gas containing nitrogen oxide (Nox) is located on the inlet pipe When it is 250 to 500 ppm, the NH ₃ :NO _x injection ratio is adjusted to 0.8 to 1.2 to control the injection amount of the mist ammonia water. Cone shape, characterized in that the engine unit 910 is included and configured A smart removal device for nitrogen oxides in the mist and vortex contact type combustion gas consisting of the ammonia water mist spray of

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