KR101040213B1 - Condensing boiler has scrubber for reducing the carbon and the nitrogen oxide - Google Patents

Abstract

A condensing boiler system is provided having a scrubber that reduces the CO ₂ and NOx contained in the exhaust gas by injecting a solvent into the flue, the exhaust passage of the exhaust gas, according to the load of the boiler. The boiler system includes a scrubber for spraying water supplied to the water-cell of the boiler body in the economizer, and selectively supplies water supplied to the scrubber according to the temperature of the condensate generated and discharged from the boiler load and the economizer. As a result, CO ₂ and NO x contained in the exhaust gas are reacted with water, thereby reducing the CO ₂ and NO x emissions.

CO2 reduction, NOx reduction, water jet, scrubber, economizer

Description

Condensing boiler has scrubber for reducing the carbon and the nitrogen oxide}

The present invention provides a low carbon / low NOx boiler (Low CO ₂ /) capable of maximally reducing emissions of carbon dioxide (hereinafter referred to as “CO ₂ ”) and nitrogen oxide (hereinafter referred to as “NOx”). NOx boiler, and more particularly relates to a condensing boiler system having a scrubber to reduce the CO ₂ and NOx contained in the exhaust gas by injecting a solvent in the flue, the exhaust passage of the exhaust gas adapted to the load of the boiler.

In general, a boiler system having a combustor such as a burner generates and emits harmful gases of many constituents that are harmful to the human body when fuel is combusted, synthesized, and decomposed, and CO ₂ and NOx are harmful to the atmosphere and the human body. This is an example.

NOx is a compound of nitrogen and oxygen. Nitrogen in air is oxidized at high temperature during combustion, and about 7 types are known. Nitrogen monoxide (NO) and nitrogen dioxide (NO ₂ ) are important for pollution. Sources of NOx emissions include automobiles, aircraft, ships, industrial boilers, incinerators, and electric furnaces.

CO ₂ and NOx in the exhaust gases emitted from industrial production sites, for example, factories, homes and office buildings, are emerging as pubs that promote global warming and destroy the global environment. In this case, they are regulated by the Enforcement Decree of the Atmospheric Environment Conservation Act and the Framework Act on Environmental Policy.

Among boiler systems used in industrial production and large-scale construction, condensing boilers reduce CO ₂ and NOx in combustion gases by more than 40% compared to low-efficiency boilers. Use is mandatory in the country.

As a suppression principle of NOx generation in a combustion apparatus such as a boiler system, (1) suppression of flame (combustion gas) temperature, (2) shortening of residence time of high temperature combustion gas, and (3) lower oxygen partial pressure are known. And there are several low NOx techniques that apply these principles. For example, a two-stage combustion method, a concentrated flame combustion method, an exhaust gas recirculation combustion method, a water-added combustion method, a steam injection combustion method, a flame cooling combustion method using a water pipe group, and the like have been proposed and put into practical use.

In the above-described technology for suppressing NOx generation, the water addition method controls the temperature of the combustion gas generated in the burner, and adds water or steam to the combustion air supplied to the burner to suppress the rise of the combustion gas temperature. It is to suppress nitrogen oxides. As a representative example of the combustion apparatus of such a water addition method is published Patent Publication No. 10-2004-0012525 "Low nitrogen oxide combustion method and apparatus thereof" published Feb. 11, 2004.

However, the low NOx combustion apparatus by adding water as described above is to add water or steam directly to the combustion air supplied into the combustor, and NOx and dioxide contained in the exhaust gas generated in the combustion zone and discharged to the atmosphere. There was a limit in greatly reducing oxygen (CO ₂ ).

This is because even if the temperature of the combustion zone is lowered by adding water or steam to the combustion air supplied to the burner, the temperature in the combustion chamber where the flame provided from the burner is combusted is very high, so nitrogen (N) in the air is oxidized at a high temperature. This is because nitrogen monoxide (NO) is essentially generated and released into the atmosphere, thereby oxidizing to nitrogen dioxide (NO ₂ ). Therefore, when the burner is operated, nitrogen dioxide (NO ₂ ) and CO ₂ are essentially discharged from the exhaust gas discharged from the combustion chamber, which adversely affects the atmospheric environment.

Accordingly, an object of the present invention is to provide a condensing boiler system having a scrubber for reducing carbon and nitrogen oxides by dissolving harmful gases such as CO ₂ and NOx contained in the exhaust gas with a solvent and then neutralizing the same.

Another object of the present invention has a scrubber to suppress the emission of CO ₂ and NOx contained in the exhaust gas by injecting a solvent for dissolving the CO ₂ and NOx contained in the exhaust gas to adapt to the boiler load on the smoke (stack) In providing a condensing boiler system.

Another object of the present invention is to properly spray the solvent for dissolving CO ₂ and NOx contained in the exhaust gas in the interior of the economizer according to the temperature of the condensate produced in the economizer to reduce condensing efficiency and CO ₂ and NOx reduction efficiency To provide a condensing boiler system that maximizes.

Another object of the present invention is to install the harmful gas contained in the exhaust gas discharged from the combustion chamber in the flue to dissolve in water that the injection amount is controlled in accordance with the boiler load and then neutralized with neutral (pH7) water by a neutralizer (neutralizer) It is to provide a low carbon / low nitrogen oxide boiler system that suppresses the emission of CO ₂ and NOx.

The present invention for achieving the above object is provided in the combustion space the combustion space in which the flame is combusted, the exhaust gas discharge passage for discharging the exhaust gas after the combustion, and the flame corresponding to the mixing ratio of the input fuel and the combustion air. A boiler shell surrounding the burner and the combustion space and discharging the heated fluid by heating water filled therein by the flame of the burner; It is installed between the exhaust gas discharge passage and the smoke (stack) and the fluid input to the inlet pipe is heated to the exhaust gas to supply to the inside of the boiler body and at the same time spraying a portion of the inlet fluid to the exhaust gas included therein An economizer attached with a scrubber for dissolving CO ₂ and NO x; A fluid pump that rotates at a speed corresponding to a fluid injection signal to pump the fluid stored in the fluid tank and to supply the fluid to the inlet pipe; A blower which is rotated at a speed corresponding to a blow control signal and sucks and mixes the exhaust gas and the outside air on the exhaust gas discharge passage to supply the combustion space of the burner; Steam flow sensor for detecting the amount of fluid flowing in and out of the water-cell in the boiler body, fluid level sensor and the fluid level sensor for detecting the fluid level filled in the water-cell and the output of the temperature sensor for sensing the temperature of the fluid And a control unit for calculating a load of the boiler and providing a blow control signal and a fluid injection signal according to the calculated boiler load to the blower and the fluid pump.

The fluid is characterized in that the water (H ₂ O) used as supplemental water in the boiler.

The economizer is sensible heat contained in the exhaust gas by the temperature difference between the exhaust gas and the fluid flowing into the housing installed on the exhaust gas discharge passage and the fin-tube connected between the fluid pump and the boiler body. Heat exchanger for recovering the latent heat of condensation and steam, and a scrubber installed in the upper portion of the housing to inject the fluid supplied from the fluid pump to the exhaust gas to dissolve CO ₂ and NOx contained therein Consists of

Between the scrubber and the fluid pump, an opening amount is controlled in response to a valve control signal to adjust an amount of fluid flowing into the scrubber, and the solenoid valve is adapted to the temperature of the fluid flowing into the inlet pipe. It characterized in that it is controlled by a valve controller for controlling the opening amount of the solenoid valve.

The valve controller may be designed to control the opening and closing amount of the solenoid valve in proportion to the temperature of the fluid flowing into the fluid pipe.

The control unit calculates the load of the boiler by inputting the steam flow sensor installed in the steam discharge pipe of the boiler body, the fluid flow sensor installed in the discharge pipe of the fluid pump and the fluid level sensor and the temperature sensor installed in the water-cell. And a controller for outputting control signals for generating the blow control signal and the fluid injection control signal corresponding thereto, and an inverter for generating the fluid injection control signal and the blow control signal corresponding to the driving frequency voltage corresponding to the control signals. Consists of.

The economizer housing is installed with a condensate tube for dissolving CO ₂ and NOx contained in the exhaust gas and discharging the harmful treatment water in the exhaust gas by the fluid injected into the inner space, the condensate tube is magnesium (Mg) neutralizer It is connected to the tank containing the neutralization of the acidity of the condensate to pH7 characterized in that it further comprises a neutralization treatment to discharge to the outside.

Condensing boiler system having a scrubber to reduce the CO ₂ and NOx contained in the exhaust gas according to an embodiment of the present invention is included in the exhaust gas by injecting a fluid such as water from the inside of the economizer installed on the exhaust gas discharge path the addition of water or steam to the combustion air for the CO ₂ and NOx to the atmosphere and dissolved by the water reaction with CO ₂ to the reducing NOx sikimeuroseo efficient than suppress the generation of NOx. In addition, by dissolving harmful gas contained in the exhaust gas with a fluid such as water immediately before being discharged to the atmosphere and discharging it into treated water, and neutralizing it with a neutralizing agent such as magnesium, the acidity can be discharged to a basic value of pH7 or more, which is environmentally friendly. .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. It should be understood, however, that the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be noted that the embodiments of the present invention described below are intended to sufficiently convey the spirit of the present invention to those skilled in the art.

1 is a front view of a condensing boiler system having a scrubber to reduce CO ₂ and NO x contained in the exhaust gas according to a preferred embodiment of the present invention, Figure 2 is a CO included in the exhaust gas according to a preferred embodiment of the present invention ₂ is a longitudinal cross-sectional view of a condensing boiler system having a scrubber for reducing NO _2, and FIG. 3 is a development diagram of a heat transfer circuit of a condensing boiler system having a scrubber for reducing CO ₂ and NO x contained in exhaust gas according to a preferred embodiment of the present invention. to be. 4 is an operation control flowchart of the fluid pump according to the preferred embodiment of the present invention.

1 to 3, the condensing boiler system 10 having a scrubber according to an embodiment of the present invention has a cylindrically sealed structure and has a water-shell 17 formed therein. To have a boiler body 12. One side of the boiler body 12 is opened and coupled to the burner 18, the furnace (furance) which is a combustion space 15 for burning the flame provided from the injection nozzle 20 of the burner 18 ( 14) is installed, and the upper part of the furnace 14 for exhausting the exhaust gas (combustion completion gas) (BEG: Boiler Exhaust Gas (BEG) filled in the interior of the combustion space 15 to the outside of the fuselage body 12) Multiple smoke tubes 16 are installed.

An air pre-heater 24 provided with a heat pipe or the like is installed at an upper portion of the opening 16 of the tube 16 formed on the front surface of the boiler body 12 to exhaust the exhaust gas discharged from the tube 16. Preheats combustion air (CA) provided from the outside as heat of BEG, and the preheated combustion air CA is passed through a wind box formed around burner 18 of the boiler body. The burner 18 is supplied.

The preheater 24 as described above introduces / exhausts the exhaust box 24a and the combustion air CA, which inflow / exhaust the high-temperature exhaust gas BEG discharged from the tubes 16 of the boiler body 12. The inlet box (24b) for discharging is coupled is configured, between the exhaust box (24a) and the inlet box (24b) is heated by a high temperature exhaust gas (BEG) discharged through the interior of the exhaust box (24a) As the heat, a heat pipe 24c for preheating the combustion air CA of the inflow box 24b is provided.

The lower portion of the burner 20 is rotated at a speed in response to the input of the blow control signal CTL2 to mix the exhaust gas and external fresh air through the exhaust gas recirculation path (EGR-P). The blower 22 which supplies the combustion air of the burner 20 through the inflow box 24b of the preheater 24 is installed. In the above, the exhaust gas recirculation path (EGR-P) is connected between the exhaust box 24a of the preheater 24 and the intake port of the blower 22, and the fresh air outside the side of the blower 22. It is to be sucked through the hole formed in the. At this time, it is preferable that the electric motor of the blower 22 uses an induction motor driven by the inverted voltage.

In addition, the outlet of the exhaust box 24a of the preheater 24 is connected to the smoke stack 30 through an economizer 26 in which a scrubber is installed. As is well known, the flue 30 is a passage for discharging the exhaust gas generated in the furnace 14 by combustion of the burner 18 to the outside.

The economizer 26 connected between the outlet of the exhaust box 24a of the preheater 24 and the flue 30 has a heat exchanger 27 installed inside the housing HS, and injects fluid thereon. The scrubber 28 is provided and comprised. The liquid inlet pipe LP of the heat exchanger 27 is connected to a fluid pump 34 for pumping and supplying a fluid stored in the fluid tank 33, and a drain pipe DP is provided. It is connected to the inside of the water-cell 17. In addition, the scrubber 28 is formed with a plurality of injection nozzles, and is connected to the fluid pump 34 through the solenoid valve (V1) to inject the fluid supplied from the inside of the housing (HS). In addition, a condensation water pipe (CWP) for discharging condensate contained therein is connected to a lower portion of the housing HS, which is connected to a neutralization device 36 containing a neutralizing agent such as magnesium (Mg). . The neutralized fluid in the neutralization treatment device 36 is sent to the fluid tank 33 is reused in the fluid supply of the boiler.

The opening / closing amount of the solenoid valve V1 connected to the scrubber 28 is controlled by the control of a valve control unit (VCU). The VCU is enabled by a boiler operation and generates a valve control signal proportional to the output of the fluid temperature sensor CTS that senses the temperature of the fluid flowing inside the fluid pipe LP. The amount of fluid supplied from the fluid pump 34 to the scrubber 28 is adjusted.

The fluid pump 34 is rotated at a speed according to a fluid injection signal input from the outside to pump the fluid stored in the fluid tank 33, for example, a fluid such as water (H ₂ O) to the economizer 26. Supply to the inlet pipe (LP) connected to), it is preferable to use an induction motor rotated by the inverted voltage.

One side of the boiler body 12, for example, a temperature filled sensor (TS) for sensing the temperature of the fluid, that is, the boiler operating water filled inside the water-shell 17 is installed, the boiler body (12) At the steam outlet of the separator 32 located therein, a steam flow rate sensor (PS) for detecting the flow rate of steam discharged therefrom and a water level sensor (13) for detecting the fluid level of the water-cell (17). Configured boiler load detectors are installed. In addition, the discharge pipe DP of the economizer 26 is provided with a fluid flow sensor LS for measuring the amount of fluid supplied to the water-cell 17, that is, the amount of water supplied.

Various detection signals detected by the steam flow sensor PS, the fluid flow sensor LS, the temperature sensor TS, and the water level sensor 13 are installed at one side of the outside of the boiler system 10 to operate the boiler overall. It is supplied to the controller 40 in the control unit 38 for controlling the.

The controller 40 calculates a boiler load by inputting a temperature of the water filled in the sensed water-cell 17, a level of water and a steam flow rate discharged therefrom, and a fluid flow rate (water supply amount) supplied thereto, and calculating the load. A controller 40 for outputting an inverter control signal for controlling the operation of the blower 22 and the fluid pump 34 in response to the boiler load, and an emulsion injection signal corresponding to the inverter control signal output from the controller 40. And an inverter 42 for generating the CTL1 and the blowing control signal CTL2. At this time, the controller 40 causes the fluid injection control signal CTL1 and the blowing control signal CTL2 corresponding to the sensed water level, temperature, steam flow rate and fluid flow rate values to be output from the inverter 42. It is programmed to access and output inverter control signals from the built-in memory table.

1, boiler body 12 including furnace barrel 14, water-shell 17, tube 16, burner 18 coupled to boiler body 12, and boiler body 12. The operation of supplying fluid by the operation of the preheater 20 and the fluid pump 34 installed at the upper portion of the general condensing boiler is similar to that of the function and operation of the condensing boiler, so the detailed description of the present invention is omitted. Please note.

Hereinafter, an operation of reducing CO ₂ and NO x contained in exhaust gas (BEG) generated in the combustion space 15 in the condensing boiler system 10 having a scrubber for reducing carbon and nitrogen oxides according to an embodiment of the present invention will be described. It demonstrates in detail.

With the water-shell 17 of the boiler body 12 shown in FIG. 1 filled with a fluid, preferably water, suitable for boiler operation, an igniter (igniter is used for the main pipe in the boiler system). When the burner 18 is ignited, the blower 22 is rotated by the initial setting value of the blow control signal CTL2 output from the inverter 42, and the burner 18 is operated by the operation of the ignition device. Sparks are generated from the nozzles 20 of.

When the flame generated from the burner 18 is burned in the furnace 14, which is a combustion space, the furnace 14 of the boiler body 12 is filled with a high temperature flame, and thus, nitrogen (N) included in the combustion air is Oxidation at high temperatures produces exhaust gas (BEG) containing harmful gases such as nitrogen monoxide (NO) and carbon dioxide (CO ₂ ).

Exhaust gas (BEG) generated as described above is discharged to the outside through the path of the association 16, the preheater 20, the economizer 26 and the flue (30). When the above boiler is operated, the fluid filled in the water-cell 17, that is, the water separated by the water separator 32 after the water is heated, is discharged.

At this time, the steam flow sensor (PS) installed in the boiler body 12 detects the amount of steam discharged from the boiler body 12 to the outside, the temperature sensor installed in the water-cell (17) is the temperature of the water filled inside, the water level The sensor 13 senses each level of water level in the water-cell 17 and provides it to the controller 40 in the control unit 38. In addition, the fluid flow sensor LS installed in the discharge pipe DP of the economizer 26 is operated by the operation of the high temperature exhaust gas BEG and the fluid pump 34 introduced into the housing HS of the economizer 26. The fluid is heated by heat exchange to the heat exchanger 27 through which the fluid flows, and the flow rate of the fluid supplied into the water-cell 17 is sensed and supplied to the controller 40.

The controller 40 reads the output of the water level sensor 13 in step S12 of FIG. 4 to search whether the water level filled in the water-cell 17 is a high level, and as a result, if it is determined that the high level is a fluid pump (S20) 34) Stops the pumping operation by outputting a control signal to stop the operation. If the level of the fluid filled in the water-cell 17 is not at a high water level, the controller 40 may determine the steam flow rate sensor PS, the temperature sensor TS, and the fluid flow rate sensor in step S14. After reading the output of LS), the load of the boiler is calculated (detected), and then the inverter control signal corresponding thereto is accessed from the internal memory table and outputted to the inverter 42 in step S16.

The inverter 42 outputs a fluid injection signal CTL1 and a blow control signal CTL2 corresponding to the inverter control signal. At this time, the fluid pump 34 is rotated at a speed corresponding to the fluid injection signal CTL1 to pump the fluid stored in the fluid tank 33, that is, water and supply it to the fluid pipe LP, and the blower 22 The combustion air CA of the burner 18 is mixed with a part of the exhaust gas rotated at a speed corresponding to the blowing control signal CTL2 and recycled through the exhaust gas recirculation environment path EGR-P and external air. To supply.

When the fluid stored in the fluid tank 33, that is, water is supplied to the fluid pipe LP by the pumping of the fluid pump 34, the fluid is exchanged with a heat exchanger located inside the housing HS of the economizer 28. 27 is supplied to the water-cell 17 to replenish the boiler operating water.

As described above, in the state where the fluid is supplied to the water-cell 17 by the operation of the fluid pump 34, if the high-temperature exhaust gas (BEG) is generated in the furnace (14), as described above Likewise, it is discharged to the atmosphere through the plumbing 16, the exhaust box 24a of the preheater 24, the economizer 26 and the flue 30.

At this time, since the fluid supplied by the operation of the fluid pump 34 flows in the heat exchanger 27 located inside the housing HS of the economizer 26, the exhaust gas BEG is discharged relatively low. The heat exchange is performed between the heat exchanger 27 through which the fluid of temperature flows, and heated fluid is supplied to the water-cell 17 through the discharge pipe DP.

When the heat exchange as described above is made in the economizer 26, condensate is generated in the heat exchanger 27, the condensate generated in this way to the neutralization treatment device 36 through the condensate pipe (CWP) formed in the lower portion Supplied. The condensate produced as described above has an acidity of about pH 4, and the neutralization treatment device 36 contacts the neutralizing agent, for example, magnesium (Mg) and the condensate contained therein, and neutralizes and discharges the pH to about pH 7. The condensed water treated by the neutralization treatment device 36 is resupplied to the fluid tank 33 to be recycled into the boiler operating water.

In addition, the scrubber 28 installed in the upper part of the heat exchanger 27 of the economizer 26 is supplied from the fluid pipe LP and flows fluid, ie, water, introduced through the solenoid valve V1 into the housing HS. It is injected into the high-temperature exhaust gas (BEG) that is introduced into and discharged into the flue (30). Therefore, NOx and CO ₂ contained in the exhaust gas (BEG) are dissolved in the fluid (water: H ₂ 0) injected from the scrubber 28, as shown in Equations 1 and 2, and CO ₂ and NOx are released to the atmosphere. About 40% is also reduced.

Equation 1 CO ₂ + H ₂ O → H ₂ CO ₃

[Equation 2] NOx + H ₂ O → NHO ₂ → NHO ₃

That is, CO ₂ and NOx are chemically reacted with water to be converted into carbonic acid (H ₂ CO ₃ ) and nitric acid (NHO ₃ ) to have strong acidity (ph3 ~ ph4). At this time, the scrubber 28 in the economizer 26 injects the water supplied by the fluid pump 34 pumping the water stored in the water supply tank 33 in accordance with the boiler load to the exhaust gas BEG. The CO ₂ and NOx contained are dissolved in water and converted into carbonic acid and nitrous acid. The converted condensate is discharged through the condensate pipe (CWP).

Since the condensed water is strongly acidic (ph 3 ~ ph 4), while being connected to the magnesium (mg) contained in the neutralization treatment device 36 installed at the bottom thereof, the condensed water is converted into neutral water by a chemical reaction such as 33) to prevent environmental pollution.

Equation 3 H ₂ CO ₃ + Mg → MgCO ₃ + 2H ⁺

Equation 4 NHO ₃ + Mg → MgNO ₃ + 2H ⁺

The solenoid valve V1 connected between the scrubber 28 and the inlet pipe LP which is the outlet of the fluid pump 34 is installed in the inlet pipe LP which is the output side of the fluid pump 34 to the economizer 26. The opening amount is controlled by the VCU 50 which inputs a fluid temperature sensor CTS for sensing the temperature of the supplied fluid to control the injection amount of the fluid.

The VCU 50 is enabled by a boiler operation and reads the fluid temperature detected by the fluid temperature sensor CTS, that is, a sensing temperature of water supplied to the heat exchanger 27 of the economizer 26. . In this case, since the water supplied to the economizer 26 is neutralized with the condensed water discharged from the economizer 26 as described above, the water may be about several tens of degrees Celsius or more.

This is because the temperature of condensate recovered in industrial and heating boiler systems recovering condensate rises above the dew point of 70 ° C or higher, and when the condensate is continuously neutralized and resupplied to the fluid tank 33, the fluid tank This is because the temperature of the fluid stored in (33) can rise to about 70 ° C.

The VCU 50 reading the output of the temperature sensor CTS is operated when the temperature of the fluid (water) supplied to the economizer 26 by the operation of the fluid pump 34 is equal to or higher than the set temperature. ) By supplying the fluid in the fluid pipe (LP) to the scrubber 28 to inject the fluid into the hot exhaust gas (BEG) passing through the interior of the economizer 26 to NOx contained in the exhaust gas (BEG) and CO ₂ is dissolved in the fluid to reduce it.

At this time, the VCU 50 adjusts the opening amount of the solenoid valve V1 in proportion to the temperature of the fluid flowing through the fluid pipe LP. For example, when the temperature of the fluid is greater than or equal to the set temperature, the solenoid valve V1 is opened by about 1/2, and then the amount of opening of the solenoid valve V1 becomes larger in proportion to the increase in the temperature of the fluid so that the scrubber ( It is to control the amount of fluid injected in 28).

The boiler system having a nitrogen oxide reduction processor according to an embodiment of the present invention discharges harmful gases contained in exhaust gas by continuously spraying a solvent, for example, water, which dissolves carbon dioxide and nitrogen oxides according to a boiler load. Can be suppressed more efficiently.

1 is a front view of a condensing boiler system having a scrubber to reduce the CO ₂ and NOx contained in the exhaust gas according to a preferred embodiment of the present invention.

Figure 2 is a longitudinal sectional view of a condensing boiler system having a scrubber to reduce the CO ₂ and NOx contained in the exhaust gas in accordance with a preferred embodiment of the present invention.

3 is a development diagram of a heat transfer circuit of a condensing boiler system having a scrubber for reducing CO ₂ and NO x contained in exhaust gas according to a preferred embodiment of the present invention.

Figure 4 is a flow chart of the operation of the fluid pump according to a preferred embodiment of the present invention.

`` Explanation of symbols on the main parts of the drawings ''

10: condensing boiler system, 12: boiler fuselage,

13: water level sensor, 14: old pain,

15: combustion space, 16: association,

17: water shell, 18: burner,

20: nozzle, 22: blower,

24: air preheater, 26: scrubber economizer,

27: heat exchanger, 28: scrubber,

30: year, 32: separator,

33: fluid tank, 34: fluid pump,

36: neutralization apparatus, 38: control unit,

40: controller, 42: inverter,

50: valve control unit, EGR-P: exhaust gas recirculation passage,

BEG: burner exhaust gas, HAD: heating air passage,

CA: combustion air, LP: inlet pipe,

DP: discharge pipe, CWP: condensate pipe,

PS: Steam flow sensor, TS: Temperature sensor

LS: Fluid flow sensor, CTS: Condensate temperature sensor,

Claims (4)

A condensing boiler system having a scrubber for reducing carbon and nitrogen oxides, the condensing boiler system comprising: a combustion space in which a flame is combusted; an exhaust gas exhaust passage for exhausting the exhaust gas after combustion; and a mixing ratio of input fuel and combustion air; A burner providing a flame to the combustion space and a boiler body surrounding the combustion space and discharging a heated fluid by heating water filled therein by the flame of the burner; Installed between the exhaust gas discharge passage and the flue, the fluid flowing into the inlet pipe is heated by the exhaust gas to supply to the inside of the boiler body and at the same time spraying a portion of the inlet fluid to the exhaust gas contained therein CO ₂ And an economizer attached with a scrubber to dissolve NOx; A fluid pump that rotates at a speed corresponding to a fluid injection signal to pump the fluid stored in the fluid tank and to supply the fluid to the inlet pipe; A blower which is rotated at a speed corresponding to a blow control signal and sucks and mixes the exhaust gas and the outside air on the exhaust gas discharge passage to supply the combustion space of the burner; Steam flow sensor for detecting the amount of fluid flowing in and out of the water-cell in the boiler body, fluid level sensor and the fluid level sensor for detecting the fluid level filled in the water-cell and the output of the temperature sensor for sensing the temperature of the fluid The scrubber for reducing the carbon and nitrogen oxides is characterized in that it comprises a control unit for calculating the load of the boiler by the blower, and providing a blowing control signal and a fluid injection signal to the blower and the fluid pump according to the calculated boiler load; Having condensing boiler system. The method of claim 1, wherein the economizer is included in the exhaust gas by the temperature difference between the exhaust gas and the fluid flowing into the housing installed on the exhaust gas discharge passage and the fin-tube connected between the fluid pump and the boiler body. Heat exchanger for recovering sensible heat and latent condensation of water vapor, and a scrubber installed in the upper portion of the housing to inject the fluid supplied from the fluid pump to the exhaust gas to dissolve CO ₂ and NOx contained therein. A condensing boiler system having a scrubber for reducing carbon and nitrogen oxides. The solenoid valve according to claim 1 or 2, wherein an opening amount is controlled between the scrubber and the fluid pump to adjust an amount of fluid flowing into the scrubber in response to a valve control signal. Condensing boiler system having a scrubber to reduce the carbon and nitrogen oxides, characterized in that the valve controller for controlling the opening amount of the solenoid valve in response to the temperature of the fluid flowing into the inlet pipe. According to claim 3, wherein the condensate pipe is installed in the housing of the economizer is dissolved by CO ₂ and NOx contained in the exhaust gas by the fluid injected into the inner space to discharge the harmful treatment water acidic, Condensing boiler system having a scrubber to reduce the carbon and nitrogen oxides, characterized in that it further comprises a neutralizer which is connected to the tank containing the neutralizing agent of magnesium to neutralize the acidity of the condensate to discharge to the outside.

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