KR20180116206A - METHOD AND APPARATUS FOR CONTROLLING AMPLITUDE OF AMMONIA IN ACTIVATED CARBON DEFENSE AND NOx - Google Patents

Abstract

A method for controlling the ammonia injection rate of an activated carbon desulfurization and denitrification plant is provided. The method includes obtaining inlet flue gas condition data, outlet flue gas condition data, a value of a temperature-pressure compensated inlet flue gas flow rate and an ammonia dilution air flow rate; Using the pre-established first computational model, the first calculation model is used to calculate the inlet flue gas flow rate based on the inlet flue gas condition data, the outlet flue gas condition data, the value of the temperature-pressure compensated inlet flue gas flow rate, the ammonia dilution air flow rate, Calculating a first corrected ammonia injection amount; And calculating a first target ammonia injection amount corresponding to the first corrected ammonia injection amount using a pre-established second calculation model. An apparatus for controlling the ammonia injection amount of an activated carbon desulfurization and denitration plant is additionally provided.

Description

METHOD AND APPARATUS FOR CONTROLLING AMPLITUDE OF AMMONIA IN ACTIVATED CARBON DEFENSE AND NOx

Field of the Invention The present invention relates to the field of control technology, and in particular to a method and apparatus for controlling the ammonia injection volume in an active carbon desulfurization and denitrification plant.

This application claims priority to Chinese patent application No. 201610641484.7 entitled "Method and Apparatus for Controlling the Ammonia Injection Amount of Activated Carbon Desulfurization and Denitration Facility", filed with the National Intellectual Property Office of China on August 8, 2016 , The entirety of which is incorporated herein by reference.

SO ₂ and NO x (nitrogen oxides) in the flue gas produced during the sintering process account for most of the total emissions of the steel industry. In this case, desulfurization and denitrification must be performed on the flue gas produced during sintering to meet the international emission standards of SO ₂ and NO x in the flue gas. For the flue gases generated in the sintering apparatus of the steel industry, it is desirable to employ desulfurization and denitration apparatus and methods, including activated carbon adsorption columns and stripping columns.

The activated carbon adsorption column is used for adsorbing pollutants of flue gas generated during sintering, including sulfur oxides, nitrogen oxides and dioxins, and the removal column is used for thermal regeneration of activated carbon. The activated carbon desulfurization process is a promising flue gas purification process with the advantage that it does not produce waste water and residual waste while achieving a high desulfurization rate and simultaneously denitrification, dioxin removal and dust removal. Generally, a certain amount of ammonia is injected into the adsorption tower so that ammonia and nitrogen oxide react with each other at a predetermined temperature to produce nitrogen and water, thereby achieving denitrification. It should be avoided that an appropriate amount of ammonia injection should be selected to reach the plant target denitrification value and that too much ammonia is injected causing ammonia escape at the flue gas outlet and thus not meeting international environmental protection standards. Therefore, it is desirable to reasonably control the ammonia injection amount of the facility.

In the prior art, generally, the amount of ammonia injected (of the activated carbon desulfurization and denitration plant) is manually adjusted based on operator experience. Specifically, the operator manually corrects the target ammonia injection amount several times until the desulfurization and denitrification effect appears. In such a system, it is difficult to obtain an optimal ammonia injection amount for achieving a desired desulfurization and denitrification effect, and therefore, reliability is lowered. In other words, injecting excess ammonia can lead to waste of ammonia, which increases operating costs, and can even cause secondary contamination once the ammonia is released into the air; With insufficient ammonia, the required desulfurization and denitrification effects can not be achieved.

From the above viewpoint, a method and apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant are presented in accordance with the present invention, and thus the desired ammonia injection amount to achieve desulfurization and denitrification effects meeting the requirements (international environmental protection standards) Can be obtained, and the operating cost of the enterprise is saved.

In order to achieve the above object, the following technical solution is provided according to the present invention.

A method for controlling the ammonia injection amount of an activated carbon desulfurization and denitrification plant,

Obtaining inlet flue gas state data, outlet flue gas state data, a value of a temperature-pressure compensated inlet flue gas flow rate and an ammonia dilution air flow rate, wherein the inlet flue gas state Wherein the data comprises the SO ₂ concentration, the NO x concentration and the humidity of the inlet flue gas and the outlet flue gas condition data comprises the SO ₂ concentration of the outlet flue gas;

Using the pre-established first computational model, the inlet flue gas condition data, the outlet flue gas condition data, the value of the temperature-pressure compensated inlet flue gas flow rate, the ammonia dilution air flow rate and the pre- Calculating a first corrected ammonia injection amount, wherein the pre-established parameter is selected from the group consisting of a target denitration value, a target ammonia leak amount of the outlet flue gas, a correction factor of NH ₃ , a correction coefficient of the first target ammonia injection amount, Comprising: And

Calculating a first target ammonia injection amount corresponding to the first corrected ammonia injection amount using a pre-set second calculation model

.

Preferably, the method further comprises:

Calculating a difference between the first target amount of ammonia injection and the actual amount of ammonia injection and adjusting an open degree of the ammonia flow rate control valve until the difference is less than a pre- , Wherein the actual amount of ammonia injection is detected by an ammonia flow meter

. ≪ / RTI >

Advantageously, using said pre-established first computational model, at least one of said inlet flue gas condition data, said outlet flue gas condition data, said temperature-pressure compensated inlet flue gas flow rate value, said ammonia dilution air flow rate, - calculating a first corrected ammonia injection amount based on the set parameters,

Calculating the volume per hour of inlet NOx according to the following formula:

NOX _in = F 11 占Humidity占NOX 11 (first formula)

(At this time, NOX _in the inlet represents the hourly volume of NOX, F 11 is the temperature represents the value of the gas flow pressure compensated inlet flue, Humidity represents the humidity of the inlet flue gas, NOX 11 is the inlet flue gas NOx < / RTI >

Calculating the outlet flue gas flow rate according to the second formula:

F 12 = F 11 + OFF_GAS (second formula)

(Where OFF_GAS represents the ammonia dilution air flow rate and F 12 represents the outlet flue gas flow rate);

Calculating the volume per hour of inlet SO ₂ according to the following formula:

SO _2in = F 11 x Humidity x SO ₂ 11 (the third formula)

(In this case, SO _2in represents the hourly volume of the inlet SO _2, SO ₂ 11 represents an SO ₂ concentration of the inlet flue gas);

Calculating the volume per hour of outlet SO ₂ according to the following formula:

SO _2out = F 12 × Humidity × SO ₂ 12 (Formula 4)

(In this case, SO _2out represents the hourly volume of the outlet SO _2, SO ₂ 12 represents an SO ₂ concentration in the flue gas exit);

Calculating the desulfurization rate of an activated carbon desulfurization and denitrification plant according to the following formula:

(제5 공식)

(Formula 5)

(Where SO 2 _eff represents the desulfurization rate of the activated carbon desulfurization and denitration plant);

Calculating an ammonia injection intermediate variable corresponding to SO ₂ according to the following formula 6 and calculating an ammonia injection intermediate variable corresponding to NO x according to the following formula:

(제6 공식)

(Formula 6)

(In this case, NH3 _SO2 represents the ammonia injection intermediate variable corresponding to a SO _2, NH ₃ _K represents a correction coefficient of the NH ₃ for removing SO ₂ from the flue gas inlet)

(제7 공식)

(Formula 7)

(At this time, _NOX NH3 represents the ammonia injected into the intermediate variable corresponding to NOX, _in NOX indicates the hourly volume of the inlet NOX, NOX _ SV represents the target NOx removal values); And

Calculating a first corrected ammonia injection amount according to the following formula 8:

(제8 공식)

(Formula 8)

(At this time, NH _{3cal _corrected_value} represents the first correction injection amount of ammonia, NH ₃ _L denotes a target ammonia leakage of the outlet flue gas)

 . ≪ / RTI >

Advantageously, calculating the first target ammonia dose corresponding to the first corrected ammonia dose using the pre-established second calculation model comprises:

Calculating the first target ammonia injection amount corresponding to the first corrected ammonia injection amount according to the following formula 9

(제9 공식)

(Formula 9)

(At this time, NH _{3cal _value} is the first represents the target ammonia injection amount which is a target ammonia injection amount of the adsorption tower, NH _{3correct _value} The value of the claim includes a first correction ammonia injection amount, K _NH3 is the first target ammonia The correction coefficient of the injection amount, and n represents the number of adsorption towers)

. ≪ / RTI >

Preferably, the method further comprises, before the step of calculating the first target ammonia dose corresponding to the first corrected ammonia dose using the pre-established second calculation model,

Determining whether the first corrected ammonia injection amount exceeds a first pre-set range and whether each of the variables included in the pre-established first calculation model exceeds a second pre-set range corresponding to a respective variable; And

When the first corrected ammonia injection amount exceeds the first pre-set range and / or when each variable included in the predetermined first calculation model exceeds the second pre-set range corresponding to each variable, Updating the first corrected ammonia injection amount to a second predetermined corrected ammonia injection amount pre-set by the user

May be further included.

Preferably, the method further comprises, before the step of calculating the first target ammonia dose corresponding to the first corrected ammonia dose using the pre-established second calculation model,

Obtaining a third corrected ammonia injection amount input by a user, and updating the first corrected ammonia injection amount to the third corrected ammonia injection amount

May be further included.

Preferably, the method further comprises:

Determining whether the first target amount of ammonia injection exceeds a third pre-established range and whether each of the variables included in the pre-established second calculation model exceeds a fourth pre-established range corresponding to each variable ; And

Wherein the first target ammonia injection amount exceeds the third pre-set range and / or each of the variables included in the pre-established second calculation model exceeds the fourth pre-set range corresponding to the respective variables , Calculating a second target ammonia injection amount and updating the first target ammonia injection amount to the second target ammonia injection amount according to the following formula 10:

(제10 공식)

(Formula 10)

(At this time, NH _{3set _value_ 1} denotes the second target ammonia injection amount, K _p1 is advance by the user - represents a second correction coefficient of the target ammonia injection amount is set, NH3 _NOX is ammonia injection intermediate variable that corresponds to the NOX , And n represents the number of adsorption towers)

May be further included.

Preferably, the method further comprises:

Obtaining a correction factor of the third target ammonia injection amount input by the user; And

Calculating the third target ammonia injection amount and updating the first target ammonia injection amount to the third target ammonia injection amount according to the following formula 11:

(제11 공식)

(Formula 11)

(At this time, NH _{3set _value_2} represents the third target injection amount of ammonia, K _p2 represents a correction coefficient of the third target injection amount of ammonia)

May be further included.

An apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant,

A first acquisition module configured to acquire inlet flue gas status data, outlet flue gas status data, a value of a temperature-pressure compensating inlet flue gas flow rate and an ammonia dilution air flow rate, wherein the inlet flue gas status data comprises SO ₂ concentration, NO x concentration and humidity, and wherein the outlet flue gas condition data comprises an SO ₂ concentration of the outlet flue gas;

Using the pre-established first computational model, based on the inlet flue gas condition data, the outlet flue gas condition data, the value of the temperature-pressure compensating inlet flue gas flow rate, the ammonia dilution air flow rate and pre- A first calculation module configured to calculate a first corrected ammonia injection amount, wherein the pre-established parameters include a target denitration value, a target ammonia leak rate of the outlet flue gas, a correction factor of NH ₃ , a correction factor of the first target ammonia injection amount, A first calculation module including a number of adsorption towers; And

A second calculation module configured to calculate the first target ammonia dose corresponding to the first corrected ammonia dose using a pre-established second calculation model,

.

Preferably,

An adjustment module configured to calculate a difference between the first target ammonia injection amount and an actual ammonia injection amount and to adjust the opening degree of the ammonia flow control valve until the difference is smaller than a pre-set threshold based on the difference, The dosing volume is detected by an ammonia flow meter,

May be further included.

Preferably, the first calculation module includes:

A first calculation unit configured to calculate a volume per hour of inlet NOX according to the following first formula:

NOX _in = F 11 占Humidity占NOX 11 (first formula)

(At this time, NOX _in the inlet represents the hourly volume of NOX, F 11 is the temperature represents the value of the gas flow pressure compensated inlet flue, Humidity represents the humidity of the inlet flue gas, NOX 11 is the inlet flue gas NOx < / RTI >

A second calculation unit configured to calculate an outlet flue gas flow rate according to the second formula:

F 12 = F 11 + OFF_GAS (second formula)

(Where OFF_GAS represents the ammonia dilution air flow rate and F 12 represents the outlet flue gas flow rate);

A third calculation unit configured to calculate the volume per hour of inlet SO ₂ according to the following third formula:

SO _2in = F 11 x Humidity x SO ₂ 11 (the third formula)

(In this case, SO _2in represents the hourly volume of the inlet SO _2, SO ₂ 11 represents an SO ₂ concentration of the inlet flue gas);

A fourth calculation unit configured to calculate a volume per hour of the outlet SO ₂ according to the following formula:

SO _2out = F 12 × Humidity × SO ₂ 12 (Formula 4)

(In this case, SO _2out represents the hourly volume of the outlet SO _2, SO ₂ 12 represents an SO ₂ concentration in the flue gas exit);

A fifth calculation unit configured to calculate a desulfurization rate of said activated carbon desulfurization and denitrification plant according to the following formula:

(제5 공식)

(Formula 5)

(Where SO 2 _eff represents the desulfurization rate of the activated carbon desulfurization and denitration plant);

A sixth calculation unit configured to calculate an ammonia injection intermediate variable corresponding to SO ₂ according to the following formula:

(제6 공식)

(Formula 6)

(In this case, NH3 _SO2 represents the ammonia injection intermediate variable corresponding to a SO _2, NH ₃ _K represents a correction coefficient of the NH ₃ for removing SO ₂ from the flue gas inlet);

A seventh calculation unit configured to calculate an ammonia injection intermediate coefficient corresponding to NOX according to the following formula:

(제7 공식)

(Formula 7)

(At this time, _NOX NH3 represents the ammonia injected into the intermediate variable corresponding to NOX, _in NOX indicates the hourly volume of the inlet NOX, NOX _ SV represents the target NOx removal values); And

An eighth calculation unit configured to calculate a first corrected ammonia injection amount according to the eighth formula:

(제8 공식)

(Formula 8)

(At this time, NH _{3cal _corrected_value} represents the first correction injection amount of ammonia, NH ₃ _L denotes a target ammonia leakage of the outlet flue gas)

. ≪ / RTI >

Preferably, the second calculation module further comprises:

A ninth calculation unit configured to calculate the first target ammonia injection amount corresponding to the first corrected ammonia injection amount according to the following formula 9:

(제9 공식)

(Formula 9)

(At this time, NH _{3cal _value} is the first represents the target ammonia injection amount which is a target ammonia injection amount of the adsorption tower, NH _{3correct _value} The value of the claim includes a first correction ammonia injection amount, K _NH3 is the first target ammonia The correction coefficient of the injection amount, and n represents the number of adsorption towers)

. ≪ / RTI >

Preferably,

Determine whether the first corrected ammonia injection amount exceeds a first pre-set range and whether each of the variables included in the pre-established first calculation model exceeds a second pre-set range corresponding to each variable; When the first corrected ammonia injection amount exceeds the first pre-set range and / or when each of the variables included in the pre-set first calculation model exceeds the second predetermined range of the respective parameters, A first update module configured to update a first corrected ammonia injection amount to a second predetermined corrected ammonia injection amount pre-

May be further included.

Preferably the apparatus may further comprise a second update module configured to obtain a third corrected ammonia injection amount input by the user and update the first corrected ammonia injection amount to the third corrected ammonia injection amount.

Preferably,

Determine whether the first target ammonia injection amount exceeds a third pre-established range, and whether each of the variables included in the pre-established second calculation model exceeds a fourth pre-established range corresponding to each variable; If the first target ammonia injection amount exceeds the third pre-set range and / or each of the variables of the pre-established second calculation model exceeds the fourth pre-set range corresponding to each variable, A third update module configured to calculate a second target ammonia injection amount according to the tenth formula and update the first target ammonia injection amount to the second target ammonia injection amount;

(제10 공식)

(Formula 10)

(At this time, NH _{3set _value_ 1} denotes the second target ammonia injection amount, K _p1 is advance by the user - represents a second correction coefficient of the target ammonia injection amount is set, NH3 _NOX is ammonia injection intermediate variable that corresponds to the NOX , And n represents the number of adsorption towers)

May be further included.

Preferably,

Obtaining a correction factor of the third target ammonia injection amount input by the user; A fourth update module configured to calculate the third target ammonia injection amount and update the first target ammonia injection amount to the third target ammonia injection amount according to the following formula 11:

(제11 공식)

(Formula 11)

(At this time, NH _{3set _value_2} represents the third target injection amount of ammonia, K _p2 represents a correction coefficient of the third target injection amount of ammonia)

May be further included.

In this technical solution, it can be seen that, compared with the prior art, a method and apparatus for controlling the ammonia injection amount of an activated carbon desulfurization / denitration facility according to the present invention are provided. In the technical solution according to the invention, the pre-set first by using the calculation model, (including SO ₂ concentration, NOX concentration and humidity of the inlet flue gas), the inlet flue gas state data, the exit flue gas state data (exit including the SO ₂ concentration in the flue gas), the temperature-pressure-compensated entrance year value of gas flow rate, ammonia dilution air flow rate and pre-set parameters (target NO x removal values, the target ammonia leakage, compensation of the NH ₃ in the exit flue gas The correction factor of the first target ammonia injection amount, and the number of adsorption towers), the first corrected ammonia injection amount is calculated. A first target ammonia injection amount corresponding to the first corrected ammonia injection amount is then calculated using the pre-established second calculation model so that the first target ammonia injection amount corresponds to the current state of the active carbon desulfurization and denitration facility . That is, the first target ammonia injection amount is determined based on the current flue gas data (inlet flue gas data, outlet flue gas data, temperature-pressure compensated inlet flue gas flow rate, ammonia dilution air flow rate, Pre-set variables), which is much more accurate than the amount of target ammonia injected manually in the prior art based on experience. In this case, it is not necessary for the operator to manually modify the target ammonia injection quantity several times depending on experience. Therefore, with the technical solution according to the present invention, a desirable amount of ammonia injection can be obtained, thereby obtaining a desulfurization and denitrification effect that meets the requirements (international environmental protection standard). In addition, it avoids the injection of excess ammonia, which effectively saves on operating costs.

In addition, the method and apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant of the present invention is more flexible and convenient because it has a high degree of automation and does not require the field operator to repeatedly adjust the target ammonia injection amount.

In order to make the technical solution according to the prior art or according to the embodiment of the present invention clearer, the drawings used in the description of the prior art or the embodiments of the present invention are briefly described as follows. It is evident that the drawings described below merely illustrate embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the following figures without any creative work.
1 is a structural view of an activated carbon desulfurization and denitration plant according to the prior art;
2 is a flow diagram of a method for controlling the ammonia injection rate of an activated carbon desulfurization and denitrification plant in accordance with one embodiment of the present invention;
3 is a structural view of an apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant according to an embodiment of the present invention.

Technical solutions in accordance with embodiments of the present invention are clearly and completely described with the following drawings of embodiments of the present invention. It should be understood that the described embodiments are few in all aspects of the present invention. Based on an embodiment of the present invention, any other embodiment obtained by a person skilled in the art without any creative work is within the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS In order that the above objects, features and advantages of the present invention become more apparent, the present invention will be described in detail below with reference to the drawings and embodiments.

First, prior to describing a technical solution according to embodiments of the present invention, a prior art active carbon desulfurization and denitration facility is briefly introduced.

Reference is made to Fig. 1, which is a structural view of an activated carbon desulfurization and denitrification plant according to the prior art. As shown in Figure 1, a process flow diagram of activated carbon is first introduced, followed by a work flow of ammonia injection.

(1) Introduction of process flow of activated carbon

As shown in Figure 1, the active carbon desulfurization and denitrification facility is a multi-adsorption tower facility. After the dust removal process is performed on the flue gas generated during the sintering, the flue gas is pressurized by a booster fan and then transferred to the adsorption towers A to D. SO ₂ in the flue gas at the adsorption column is adsorbed by the activated carbon and oxidized by the catalyst H ₂ SO ₄ . In the meantime, the nitrogen oxides react with the ammonia injected from the adsorption column to produce ammonium nitrate, and the nitrogen oxides and ammonia react with each other to produce nitrogen and water. Sulfuric acid and ammonium nitrate produced during the chemical reaction are adsorbed by activated carbon. The saturated activated carbon is released to the hopper of the activated carbon conveyor 2 through the material discharge rollers and the star-shaped ash discharge valve, after which the material is removed by the conveyor 2 stripping tower (TO2).

Nitrogen is heated to 450 ° C by a hot air circulating fan (CO2) and a heater (EO2), and then transferred to a stripping column to indirectly heat the saturated activated carbon. The heated activated carbon releases a high concentration of SO ₂ . The gas having a high concentration of SO ₂ is transferred to the sulfuric acid production system through the pipeline, and a high concentration of sulfuric acid product can be produced. The heated and stripped activated carbon is discharged onto the activated carbon vibrating screen V02 through star-shaped re-discharge valve 102C. The activated carbon on the coarse granule is selected through the vibration screen (V02) and discharged to the activated carbon conveyor (1). The coarse granular activated carbon is fed again to the adsorption towers A to D by the conveyor 1 for reuse, while the fine carbon particles and dust are discharged to an activated carbon screening hopper.

As shown in FIG. 1, the oxygen content of the parameters SO ₂ , NO x, dust, and untreated flue gas and purified flue gas (flue gas at the outlet, desulfurized and denitrated by the adsorption tower) Is detected by a monitoring system (CEMS).

(2) Introduction of work flow of ammonia injection

In order to achieve the denitrification effect with the activated carbon desulfurization and denitrification facility, a certain amount of ammonia is injected into the adsorption tower, and the ammonia and the nitrogen oxide react with each other to generate nitrogen and water. As shown in Fig. 1, the valve of the ammonia tank is opened first, and the ammonia injection amount is adjusted by an ammonia flow rate control valve (FCV). The ammonia flow rate can be displayed there by the ammonia flowmeter (FIT) or in real time in the central control room. Ammonia, NH ₃ concentration as to be lower than the explosion limit, "ammonia mixture (ammonia mixer)" of, is mixed with air in the hot air flow from the fan diluted ammonia. The diluted ammonia is sent to the flue through the inlet of the adsorption column and is uniformly injected by the injected ammonia grid.

A sufficient amount of air may be provided by the ammonia dilution fan to dilute the ammonia. The dilution of the ammonia is to improve the denitrification rate by avoiding an explosion accident due to the ammonia concentration of the ammonia pipe exceeding a predetermined value and by thoroughly mixing the flue gas and ammonia generated during sintering.

Specifically, the desulfurization and denitrification chemical reactions of the activated carbon desulfurization and denitration plant are as follows.

I. Desulfurization reaction

a. Chemisorption

SO ₂ + O _{2 -} > SO ₃

SO ₃ + n H ₂ O → H ₂ SO ₄ + (n-1) H ₂ O

b. (By NH ₃ / SO ₂ ) sulfate

H ₂ SO ₄ + NH _{3 -} > NH ₄ HSO ₄

NH ₄ HSO ₄ + NH ₃ → (NH ₄ ) ₂ SO ₄

II. Denitrification reaction

NO + NH ₃ + 1 / 2O _{2 -} > N ₂ + 3 / 2H ₂ O

Hereinafter, a technical solution according to an embodiment of the present invention will be described in detail.

In the first embodiment

Reference is now made to Fig. 2, which is a flow chart of a method for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant according to an embodiment of the present invention. A method for controlling the ammonia injection amount of an activated carbon desulfurization and denitrification plant according to an embodiment of the present invention is applied to a control apparatus. Optionally, the control device may be a programmable logic controller (PLC). As shown in FIG. 2, the method includes steps S201 to S203.

In step S201, the inlet flue gas state data, the outlet flue gas state data, the value of the temperature-pressure compensated inlet flue gas flow rate and the ammonia dilution air flow rate are obtained.

The inlet flue gas state data comprises the SO ₂ concentration, NOX concentration and humidity of the inlet flue gas; The outlet flue gas state data includes SO ₂ concentration in the flue gas outlet.

The inlet flue gas condition data and the outlet flue gas condition data are detected by the CEMS system. The value of the temperature-pressure compensated inlet flue gas flow rate is detected by an inlet flue gas flow meter. The ammonia dilution air flow rate is detected by an ammonia dilution air flow meter.

In the step S202, the inlet flue gas condition data, the outlet flue gas condition data, the value of the temperature-pressure compensated inlet flue gas flow rate, the ammonia dilution air flow rate, and the pre- On the basis of the set parameters, the first corrected ammonia injection amount is calculated.

The pre-established parameters include the target denitration value, the target ammonia leak rate of the outlet flue gas, the correction factor of NH _3, the correction factor of the first target ammonia injection quantity, and the number of adsorption towers (of equipment). The pre-set parameters are preset by the user at the human machine interface (HMI) of the facility.

Optionally, in step S202,

Calculating the volume per hour of inlet NOx according to the following formula:

NOX _in = F 11 占Humidity占NOX 11 (first formula)

(At this time, NOX _in the inlet represents the hourly volume of NOX, F 11 is the temperature represents the value of the gas flow pressure compensated inlet flue, Humidity represents the humidity of the inlet flue gas, NOX 11 is the inlet flue gas NOx < / RTI >

Calculating the outlet flue gas flow rate according to the second formula:

F 12 = F 11 + OFF_GAS (second formula)

(Where OFF_GAS represents the ammonia dilution air flow rate and F 12 represents the outlet flue gas flow rate);

Calculating the volume per hour of inlet SO ₂ according to the following formula:

SO _2in = F 11 x Humidity x SO ₂ 11 (the third formula)

(In this case, SO _2in represents the hourly volume of the inlet SO _2, SO ₂ 11 represents an SO ₂ concentration of the inlet flue gas);

Calculating the volume per hour of outlet SO ₂ according to the following formula:

SO _2out = F 12 × Humidity × SO ₂ 12 (Formula 4)

(In this case, SO _2out represents the hourly volume of the outlet SO _2, SO ₂ 12 represents an SO ₂ concentration in the flue gas exit);

Calculating the desulfurization rate of an activated carbon desulfurization and denitrification plant according to the following formula:

(제5 공식)

(Formula 5)

(Where SO 2 _eff represents the desulfurization rate of the activated carbon desulfurization and denitration plant);

Calculating an ammonia injection intermediate variable corresponding to SO ₂ according to the following formula 6 and calculating an ammonia injection intermediate variable corresponding to NO x according to the following formula:

(제6 공식)

(Formula 6)

(In this case, NH3 _SO2 represents the ammonia injection intermediate variable corresponding to a SO _2, NH ₃ _K represents a correction coefficient of the NH ₃ for removing SO ₂ from the flue gas inlet)

(제7 공식)

(Formula 7)

(At this time, _NOX NH3 represents the ammonia injected into the intermediate variable corresponding to NOX, _in NOX indicates the hourly volume of the inlet NOX, NOX _ SV represents the target NOx removal values); And

Calculating a first corrected ammonia injection amount according to the following formula 8:

(제8 공식)

(Formula 8)

(At this time, NH _{3cal _corrected_value} represents the first correction injection amount of ammonia, NH ₃ _L denotes a target ammonia leakage of the outlet flue gas)

. ≪ / RTI >

In other words, the pre-established first computational model is a computational model that includes computations performed in the first through eighth equations.

In step S203, a first target ammonia injection amount corresponding to the first corrected ammonia injection amount is calculated using a pre-set second calculation model.

Specifically, in step S203,

Calculating the first target ammonia injection amount corresponding to the first corrected ammonia injection amount according to the following formula 9

(제9 공식)

(Formula 9)

(At this time, NH _{3cal _value} is the first represents the target ammonia injection amount which is a target ammonia injection amount of the adsorption tower, NH _{3correct _value} The value of the claim includes a first correction ammonia injection amount, K _NH3 is the first target ammonia The correction coefficient of the injection amount, and n represents the number of adsorption towers)

.

In other words, the pre-set second computation model is a computation model that includes computations performed in the ninth formula.

It should be noted that, in the technical solution according to the embodiment of the present invention, the unit of the parameters is an international standard unit, that is, a basic unit in the international unit system.

In the technical solutions according to embodiments of the present invention, the pre-set first by using the calculation model, (including SO ₂ concentration, NOX concentration and humidity of the inlet flue gas), the inlet flue gas state data, the exit flue gas state data (Including the SO ₂ concentration of the outlet flue gas), the value of the temperature-pressure compensated inlet flue gas flow, the ammonia dilution air flow rate and the pre-set parameters (target denitration value, target ammonia leak rate of the outlet flue gas, NH ₃ The correction coefficient of the first target ammonia injection amount, and the number of adsorption towers), the first corrected ammonia injection amount is calculated. A first target ammonia injection amount corresponding to the first corrected ammonia injection amount is then calculated using the pre-established second calculation model such that the first target ammonia injection amount corresponds to the current state of the active carbon desulfurization and denitration facility . That is, the first target ammonia injection amount is determined based on the current flue gas data (inlet flue gas data, outlet flue gas data, temperature-pressure compensated inlet flue gas flow rate, ammonia dilution air flow rate, Pre-set variables), which is much more accurate than the amount of target ammonia injected manually in the prior art based on experience. In this case, it is not necessary for the operator to manually modify the target ammonia injection quantity several times depending on experience. Therefore, with the technical solution according to the present invention, a desirable amount of ammonia injection can be obtained, thereby obtaining a desulfurization and denitrification effect that meets the requirements (international environmental protection standard). In addition, it avoids the injection of excess ammonia, which effectively saves on operating costs.

The technical solution according to embodiments of the present invention is also more flexible and convenient because it has a high degree of automation and does not require the field operator to repeatedly adjust the target ammonia injection amount.

In the second embodiment

Alternatively, a method for controlling the ammonia injection rate of an active carbon desulfurization and denitrification facility, according to another embodiment of the present invention, is characterized in that before step S203, the first corrected ammonia injection amount exceeds a first pre- Determining whether each variable included in the set first computational model exceeds a second pre-set range corresponding to each variable.

The first pre-established range is a numerical range indicating that the first corrected ammonia injection amount, pre-set by the user, meets the requirement. This numerical range includes the first corrected ammonia injection amount, the range of the inlet flue gas amount, the range of the inlet and outlet flue gas concentrations, etc. (calculated) when the equipment is operating normally and achieves the desired desulfurization and denitrification effect, Is the range of the corrected ammonia injection amount set by the user. Specifically, each of the variables included in the pre-established first computation model corresponds to a second pre-set range, and the second pre-set range corresponds to a normal value interval of the variable

When the first corrected ammonia injection amount exceeds a first pre-set range and / or when each variable included in the predetermined first calculation model exceeds the second pre-set range corresponding to each variable, 1 corrected ammonia injection amount is updated to a second corrected ammonia injection amount pre-set by the user.

When the first corrected ammonia injection amount exceeds a first pre-set range and / or when each variable included in the predetermined first calculation model exceeds the second pre-set range corresponding to each variable, 1 Correction Ammonia injection amount is an unsteady value that does not meet the above requirement and therefore indicates that it is unavailable. In this case, the first corrected ammonia injection amount should be updated to the second corrected ammonia injection amount pre-set by the user. It should be noted that the second corrected ammonia injection amount is a desirable value within the first pre-set range.

Thus, in the technical solution according to the embodiment, if it is found that the first corrected ammonia injection amount is abnormal, the first corrected ammonia injection amount is corrected to the second corrected ammonia injection amount pre-set by the user, And subsequent calculations are then performed. In this way, the abnormal first corrected ammonia injection amount can be processed in a timely and automatic manner, thereby avoiding deviation in the first target ammonia injection amount obtained in the subsequent calculation, and also avoiding an abnormal subsequent actual ammonia injection amount.

Third Embodiment

Alternatively, in accordance with another embodiment of the present invention, a method for controlling the ammonia injection rate of an active carbon desulfurization and denitrification plant comprises: obtaining a third corrected ammonia injection amount input by a user prior to step S203; And updating the corrected ammonia injection amount to the third corrected ammonia injection amount.

If the actual amount of ammonia injection is found to be abnormal after the technical solution according to the first or second embodiment of the present invention is carried out, the user may, according to the technical solution of the first embodiment of the present invention, calculate the rational first corrected ammonia injection amount (I.e., a subsequent calculation is performed with the reasonable first corrected ammonia injection amount to obtain the desired actual ammonia injection amount). The rational first corrected ammonia injection amount is referred to as the third corrected ammonia injection amount in the embodiment. Subsequent calculations are performed by taking the third corrected ammonia injection amount as the first corrected ammonia injection amount, thereby timely processing the abnormal actual ammonia injection amount with manual intervention.

Fourth Embodiment

Alternatively, the ammonia injection amount control method of an active carbon desulfurization and denitrification facility, according to another embodiment of the present invention, further comprises, before step S204, whether the first target ammonia injection amount exceeds a third pre- Determining whether each of the variables included in the pre-established second calculation model exceeds a fourth pre-set range corresponding to each variable.

The third pre-established range is a numerical range indicating that the first target ammonia injection amount, pre-set by the user, meets the requirement. Specifically, each of the variables included in the pre-set second computation model corresponds to a fourth pre-set range, and the fourth pre-set range is a normal value interval of the variable.

Wherein the first target ammonia injection amount exceeds the third pre-set range and / or each of the variables included in the pre-established second calculation model exceeds the fourth pre-set range corresponding to the respective variables , The second target ammonia injection amount is calculated according to the following formula 10 and the first target ammonia injection amount is updated to the second target ammonia injection amount.

(제10 공식)

(Formula 10)

At this time, NH _{3set _value_ 1} denotes the second target ammonia injection amount, K _p1 is advance by the user - represents a second correction coefficient of the target ammonia injection amount is set, NH3 _NOX represents an ammonia injection intermediate variable that corresponds to the NOX , and n represents the number of adsorption towers.

Specifically, K _p1 is set by the user based on the first target ammonia injection amount obtained when the desired desulfurization and denitrification effect is achieved during the previous actual operation of the facility.

Wherein the first target ammonia injection amount exceeds the third pre-set range and / or each of the variables included in the pre-established second calculation model exceeds the fourth pre-set range corresponding to the respective variables , The first corrected ammonia injection amount is an unsteady value that does not satisfy the requirement and therefore can not be used. In this case, a second target ammonia injection amount that meets the requirement (within the third pre-set range) according to the tenth formula must be calculated, together with the correction factor of the second target ammonia injection amount pre-set by the user. Thereafter, the first target ammonia injection amount is updated to the second target ammonia injection amount that satisfies the requirement. In this way, the abnormal first target ammonia injection volume can be processed in a timely and automatic manner, thereby avoiding an abnormal subsequent actual ammonia injection volume.

Fifth Embodiment

Alternatively, in accordance with another embodiment of the present invention, an ammonia injection amount control method of an active carbon desulfurization and denitrification plant may comprise, prior to step S204,

Obtaining a correction factor of the third target ammonia injection amount input by the user; And

Calculating the third target ammonia injection amount and updating the first target ammonia injection amount to the third target ammonia injection amount according to the following formula 11:

(제11 공식)

(Formula 11)

(At this time, NH _{3set _value_2} represents the third target injection amount of ammonia, K _p2 represents a correction coefficient of the third target injection amount of ammonia)

.

If the actual ammonia injection amount is still abnormal after the technical solution according to any of the above embodiments of the present invention is performed, the correction factor of the third target ammonia injection amount input by the user can be obtained. The correction factor of the third target ammonia injection amount is a value determined when a desired actual ammonia injection amount is obtained by applying the technical solution according to the first embodiment of the present invention. Thereafter, the third target ammonia injection amount is directly calculated by the eleventh formula. The abnormal first target ammonia injection amount can be processed by taking the third target ammonia injection amount as the first target ammonia injection amount, thereby timely processing the abnormal actual ammonia injection amount by manual intervention.

Optionally, a technical solution according to any embodiment of the present invention is to calculate the difference between the first target ammonia injection amount and the actual ammonia injection amount, and until the difference is less than a pre-established threshold based on the difference And adjusting the opening of the ammonia flow control valve.

The actual amount of ammonia injected is detected by an ammonia flow meter.

Calculating a difference between the first target ammonia injection amount and the actual ammonia injection amount and adjusting the opening degree of the ammonia flow amount control valve until the difference is less than a pre-set threshold based on the difference, Is achieved. In this case, as compared with the open-loop control of the prior art, the ammonia injection amount can be more accurately controlled and a more accurate and reasonable final ammonia injection amount can be obtained.

In order to more fully describe the technical solution according to the present invention, an apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification facility, corresponding to a method for controlling the amount of ammonia injection in an activated carbon desulfurization and denitrification plant according to embodiments of the present invention, Is provided according to the invention.

Reference is now made to Fig. 3, which is a structural diagram of an apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant according to an embodiment of the present invention. The apparatus is applied to a control apparatus. Optionally, the control device may be a PLC. As shown in FIG. 3, the apparatus includes a first acquisition module 301, a first calculation module 302, and a second calculation module 303.

The first acquisition module 301 is configured to acquire inlet flue gas state data, outlet flue gas state data, values of temperature-pressure compensated inlet flue gas flow rates, and ammonia dilution air flow rates. The inlet flue gas state data is SO ₂ concentration, including NOX concentration and humidity, and the outlet flue gas state data of the inlet flue gas includes a concentration of SO ₂ in the flue gas outlet.

Wherein the first calculation module (302) is configured to calculate the inlet flue gas condition data, the outlet flue gas condition data, the value of the temperature-pressure compensating inlet flue gas flow rate, the ammonia dilution Based on the air flow rate and pre-set parameters, it is configured to calculate a first corrected ammonia injection amount. The pre-established parameters include a target denitrification value, a target ammonia leak rate of the outlet flue gas, a correction factor of NH ₃ , a correction factor of the first target ammonia injection amount, and a number of adsorption towers.

The second calculation module 303 is configured to calculate the first target ammonia injection amount corresponding to the first corrected ammonia injection amount using a pre-established second calculation model.

As an apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant according to an embodiment of the present invention, a desirable amount of ammonia injection can be obtained, thereby obtaining a desulfurization and denitrification effect that meets the requirements (international environmental protection standard). In addition, it avoids the injection of excess ammonia, which effectively saves on operating costs.

In addition, the apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant according to an embodiment of the present invention is more flexible and convenient because it has a high degree of automation and does not require the field operator to repeatedly adjust the target ammonia injection amount

The first calculation module (302)

A first calculation unit configured to calculate a volume per hour of inlet NOX according to the following first formula:

NOX _in = F 11 占Humidity占NOX 11 (first formula)

(At this time, NOX _in the inlet represents the hourly volume of NOX, F 11 is the temperature represents the value of the gas flow pressure compensated inlet flue, Humidity represents the humidity of the inlet flue gas, NOX 11 is the inlet flue gas NOx < / RTI >

A second calculation unit configured to calculate an outlet flue gas flow rate according to the second formula:

F 12 = F 11 + OFF_GAS (second formula)

(Where OFF_GAS represents the ammonia dilution air flow rate and F 12 represents the outlet flue gas flow rate);

A third calculation unit configured to calculate the volume per hour of inlet SO ₂ according to the following third formula:

SO _2in = F 11 x Humidity x SO ₂ 11 (the third formula)

(In this case, SO _2in represents the hourly volume of the inlet SO _2, SO ₂ 11 represents an SO ₂ concentration of the inlet flue gas);

A fourth calculation unit configured to calculate a volume per hour of the outlet SO ₂ according to the following formula:

SO _2out = F 12 × Humidity × SO ₂ 12 (Formula 4)

(In this case, SO _2out represents the hourly volume of the outlet SO _2, SO ₂ 12 represents an SO ₂ concentration in the flue gas exit);

A fifth calculation unit configured to calculate a desulfurization rate of said activated carbon desulfurization and denitrification plant according to the following formula:

(제5 공식)

(Formula 5)

(Where SO 2 _eff represents the desulfurization rate of the activated carbon desulfurization and denitration plant);

A sixth calculation unit configured to calculate an ammonia injection intermediate variable corresponding to SO ₂ according to the following formula:

(제6 공식)

(Formula 6)

(In this case, NH3 _SO2 represents the ammonia injection intermediate variable corresponding to a SO _2, NH ₃ _K represents a correction coefficient of the NH ₃ for removing SO ₂ from the flue gas inlet);

A seventh calculation unit configured to calculate an ammonia injection intermediate coefficient corresponding to NOX according to the following formula:

(제7 공식)

(Formula 7)

(At this time, _NOX NH3 represents the ammonia injected into the intermediate variable corresponding to NOX, _in NOX indicates the hourly volume of the inlet NOX, NOX _ SV represents the target NOx removal values); And

An eighth calculation unit configured to calculate a first corrected ammonia injection amount according to the eighth formula:

(제8 공식)

(Formula 8)

(At this time, NH _{3cal _corrected_value} represents the first correction injection amount of ammonia, NH ₃ _L denotes a target ammonia leakage of the outlet flue gas)

.

The second calculation module (303)

A ninth calculation unit configured to calculate the first target ammonia injection amount corresponding to the first corrected ammonia injection amount according to the following formula 9:

(제9 공식)

(Formula 9)

(At this time, NH _{3cal _value} is the first represents the target ammonia injection amount which is a target ammonia injection amount of the adsorption tower, NH _{3correct _value} The value of the claim includes a first correction ammonia injection amount, K _NH3 is the first target ammonia The correction coefficient of the injection amount, and n represents the number of adsorption towers)

. ≪ / RTI >

Alternatively, an apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant according to another embodiment of the present invention,

Determine whether the first corrected ammonia injection amount exceeds a first pre-set range and whether each of the variables included in the pre-established first calculation model exceeds a second pre-set range corresponding to each variable; When the first corrected ammonia injection amount exceeds the first pre-set range and / or when each of the variables included in the pre-set first calculation model exceeds the second predetermined range of the respective parameters, A first update module configured to update a first corrected ammonia injection amount to a second predetermined corrected ammonia injection amount pre-

.

Alternatively, an apparatus for controlling the ammonia injection amount of an active carbon desulfurization and denitrification facility according to another embodiment of the present invention may be configured to obtain a third corrected ammonia injection amount input by a user, And a second update module configured to update with the ammonia injection amount.

Alternatively, an apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant according to another embodiment of the present invention,

Determine whether the first target ammonia injection amount exceeds a third pre-established range, and whether each of the variables included in the pre-established second calculation model exceeds a fourth pre-established range corresponding to each variable; If the first target ammonia injection amount exceeds the third pre-set range and / or each of the variables of the pre-established second calculation model exceeds the fourth pre-set range corresponding to each variable, A third update module configured to calculate a second target ammonia injection amount according to the tenth formula and update the first target ammonia injection amount to the second target ammonia injection amount;

(제10 공식)

(Formula 10)

(At this time, NH _{3set _value_ 1} denotes the second target ammonia injection amount, K _p1 is advance by the user - represents a second correction coefficient of the target ammonia injection amount is set, NH3 _NOX is ammonia injection intermediate variable that corresponds to the NOX , And n represents the number of adsorption towers)

.

Alternatively, an apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant according to another embodiment of the present invention,

A correction factor for the third target ammonia injection amount input by the user and for calculating the third target ammonia injection amount according to the following formula 11 and updating the first target ammonia injection amount to the third target ammonia injection amount 4 Update module:

(제11 공식)

(Formula 11)

(At this time, NH _{3set _value_2} represents the third target injection amount of ammonia, K _p2 represents a correction coefficient of the third target injection amount of ammonia)

.

Alternatively, an apparatus for controlling the ammonia injection amount of an active carbon desulfurization and denitrification plant according to another embodiment of the present invention may further include a calculation unit for calculating a difference between the first target ammonia injection amount and the actual ammonia injection amount, Further comprising an adjustment module configured to adjust the opening of the ammonia flow control valve until the actual ammonia injection amount is less than the set threshold, wherein the actual ammonia injection amount is detected by an ammonia flow meter.

From the above technical solution, it can be seen that, compared with the prior art, a method and apparatus for controlling the ammonia injection amount of an activated carbon desulfurization / denitration facility according to the present invention are provided. In the technical solution according to the invention, the pre-set first by using the calculation model, the inlet flue (including the SO ₂ concentration, NOX concentration and humidity of the inlet flue gas) gas-phase data, the exit flue gas state data (exit including the SO ₂ concentration in the flue gas), the temperature-pressure-compensated entrance year value of gas flow rate, ammonia dilution air flow rate and pre-set parameters (target NO x removal values, the target ammonia leakage, compensation of the NH ₃ in the exit flue gas The correction factor of the first target ammonia injection amount, and the number of adsorption towers), the first corrected ammonia injection amount is calculated. A first target ammonia injection amount corresponding to the first corrected ammonia injection amount is then calculated using the pre-established second calculation model so that the first target ammonia injection amount corresponds to the current state of the active carbon desulfurization and denitration facility . That is, the first target ammonia injection amount is determined based on the current flue gas data (inlet flue gas data, outlet flue gas data, temperature-pressure compensated inlet flue gas flow rate, ammonia dilution air flow rate, Pre-set variables), which is much more accurate than the amount of target ammonia injected manually in the prior art based on experience. In this case, it is not necessary for the operator to manually modify the target ammonia injection quantity several times depending on experience. Therefore, with the technical solution according to the present invention, a desirable amount of ammonia injection can be obtained, thereby obtaining a desulfurization and denitrification effect that meets the requirements (international environmental protection standard). In addition, it avoids the injection of excess ammonia, which effectively saves on operating costs.

In addition, the method and apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant of the present invention is more flexible and convenient because it has a high degree of automation and does not require the field operator to repeatedly adjust the target ammonia injection amount.

Finally, the related terms, such as " first ", " second ", and the like, are used merely to distinguish one object or another from another, It should also be noted that this invention has been used for this purpose. Further, " comprises " or other modified terms are intended to be non-exclusive. Thus, a process, method, article, or apparatus that comprises a plurality of elements encompasses not only that element but also other elements that are not also listed, and also encompass the unique elements of the process, method, article, or apparatus. Unless expressly limited otherwise, the phrase "including" does not exclude the presence of other similar elements in the process, method, article, or apparatus.

Embodiments herein are depicted incrementally, each of which emphasizes differences with others, and the same or similar portions of the embodiments may also be referenced to each other. Since the apparatus disclosed in the embodiments conforms to the method, the description is relatively simple and, for the relevant matter, reference can be made to the description of the method.

The previous description of the embodiments allows those skilled in the art to make or use the invention. Various modifications to the embodiments will be apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments, without departing from the true spirit or scope of the invention. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (16)

A method for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant,
Obtaining inlet flue gas state data, outlet flue gas state data, a value of a temperature-pressure compensated inlet flue gas flow rate and an ammonia dilution air flow rate, wherein the inlet flue gas state Wherein the data comprises the SO ₂ concentration, the NO x concentration and the humidity of the inlet flue gas and the outlet flue gas condition data comprises the SO ₂ concentration of the outlet flue gas;
Using the pre-established first computational model, the inlet flue gas condition data, the outlet flue gas condition data, the value of the temperature-pressure compensated inlet flue gas flow rate, the ammonia dilution air flow rate and the pre- Calculating a first corrected ammonia injection amount, wherein the pre-established parameter is selected from the group consisting of a target denitration value, a target ammonia leak amount of the outlet flue gas, a correction factor of NH ₃ , a correction coefficient of the first target ammonia injection amount, Comprising: And
Calculating a first target ammonia injection amount corresponding to the first corrected ammonia injection amount using a pre-set second calculation model
≪ / RTI > The method according to claim 1,
Calculating a difference between the first target amount of ammonia injection and the actual amount of ammonia injection and adjusting an open degree of the ammonia flow rate control valve until the difference is less than a pre- , Wherein the actual amount of ammonia injection is detected by an ammonia flow meter
≪ / RTI > The method according to claim 1,
Using the pre-established first computational model to calculate the inlet flue gas condition data, the outlet flue gas condition data, the value of the temperature-pressure compensated inlet flue gas flow, the ammonia dilution air flow rate and the pre- The step of calculating the first corrected ammonia injection amount comprises:
Calculating the volume per hour of inlet NOx according to the following formula:
NOX _in = F 11 占Humidity占NOX 11 (first formula)
(At this time, NOX _in the inlet represents the hourly volume of NOX, F 11 is the temperature represents the value of the gas flow pressure compensated inlet flue, Humidity represents the humidity of the inlet flue gas, NOX 11 is the inlet flue gas NOx < / RTI >
Calculating the outlet flue gas flow rate according to the second formula:
F 12 = F 11 + OFF_GAS (second formula)
(Where OFF_GAS represents the ammonia dilution air flow rate and F 12 represents the outlet flue gas flow rate);
Calculating the volume per hour of inlet SO ₂ according to the following formula:
SO _2in = F 11 x Humidity x SO ₂ 11 (the third formula)
(In this case, SO _2in represents the hourly volume of the inlet SO _2, SO ₂ 11 represents an SO ₂ concentration of the inlet flue gas);
Calculating the volume per hour of outlet SO ₂ according to the following formula:
SO _2out = F 12 × Humidity × SO ₂ 12 (Formula 4)
(In this case, SO _2out represents the hourly volume of the outlet SO _2, SO ₂ 12 represents an SO ₂ concentration in the flue gas exit);
Calculating the desulfurization rate of an activated carbon desulfurization and denitrification plant according to the following formula:

(Formula 5)
(Where SO 2 _eff represents the desulfurization rate of the activated carbon desulfurization and denitration plant);
Calculating an ammonia injection intermediate variable corresponding to SO ₂ according to the following formula 6 and calculating an ammonia injection intermediate variable corresponding to NO x according to the following formula:

(Formula 6)
(In this case, NH3 _SO2 represents the ammonia injection intermediate variable corresponding to a SO _2, NH ₃ _K represents a correction coefficient of the NH ₃ for removing SO ₂ from the flue gas inlet)

(Formula 7)
(At this time, _NOX NH3 represents the ammonia injected into the intermediate variable corresponding to NOX, _in NOX indicates the hourly volume of the inlet NOX, NOX _ SV represents the target NOx removal values); And
Calculating a first corrected ammonia injection amount according to the following formula 8:

(Formula 8)
(At this time, NH _{3cal _corrected_value} represents the first correction injection amount of ammonia, NH ₃ _L denotes a target ammonia leakage of the outlet flue gas)
≪ / RTI > The method according to claim 1,
Calculating the first target ammonia injection amount corresponding to the first corrected ammonia injection amount using the pre-set second calculation model,
Calculating the first target ammonia injection amount corresponding to the first corrected ammonia injection amount according to the following formula 9

(Formula 9)
(At this time, NH _{3cal _value} is the first represents the target ammonia injection amount which is a target ammonia injection amount of the adsorption tower, NH _{3correct _value} The value of the claim includes a first correction ammonia injection amount, K _NH3 is the first target ammonia The correction coefficient of the injection amount, and n represents the number of adsorption towers)
≪ / RTI > The method according to claim 1,
Before the step of calculating the first target ammonia injection amount corresponding to the first corrected ammonia injection amount using the pre-set second calculation model,
Determining whether the first corrected ammonia injection amount exceeds a first pre-set range and whether each of the variables included in the pre-established first calculation model exceeds a second pre-set range corresponding to a respective variable; And
When the first corrected ammonia injection amount exceeds the first pre-set range and / or when each variable included in the predetermined first calculation model exceeds the second pre-set range corresponding to each variable, Updating the first corrected ammonia injection amount to a second predetermined corrected ammonia injection amount pre-set by the user
≪ / RTI > 6. The method according to claim 1 or 5,
Before the step of calculating the first target ammonia injection amount corresponding to the first corrected ammonia injection amount using the pre-set second calculation model,
Obtaining a third corrected ammonia injection amount input by a user, and updating the first corrected ammonia injection amount to the third corrected ammonia injection amount
≪ / RTI > 6. The method according to claim 1 or 5,
Determining whether the first target amount of ammonia injection exceeds a third pre-established range and whether each of the variables included in the pre-established second calculation model exceeds a fourth pre-established range corresponding to each variable ; And
Wherein the first target ammonia injection amount exceeds the third pre-set range and / or each of the variables included in the pre-established second calculation model exceeds the fourth pre-set range corresponding to the respective variables , Calculating a second target ammonia injection amount and updating the first target ammonia injection amount to the second target ammonia injection amount according to the following formula 10:

(Formula 10)
(At this time, NH _{3set _value_ 1} denotes the second target ammonia injection amount, K _p1 is advance by the user - represents a second correction coefficient of the target ammonia injection amount is set, NH3 _NOX is ammonia injection intermediate variable that corresponds to the NOX , And n represents the number of adsorption towers)
≪ / RTI > The method according to claim 1,
Obtaining a correction factor of the third target ammonia injection amount input by the user; And
Calculating the third target ammonia injection amount and updating the first target ammonia injection amount to the third target ammonia injection amount according to the following formula 11:

(Formula 11)
(At this time, NH _{3set _value_2} represents the third target injection amount of ammonia, K _p2 represents a correction coefficient of the third target injection amount of ammonia)
≪ / RTI > An apparatus for controlling the amount of ammonia injected in an activated carbon desulfurization and denitrification plant,
A first acquisition module configured to acquire inlet flue gas status data, outlet flue gas status data, a value of a temperature-pressure compensating inlet flue gas flow rate and an ammonia dilution air flow rate, wherein the inlet flue gas status data comprises SO ₂ concentration, NO x concentration and humidity, and wherein the outlet flue gas condition data comprises an SO ₂ concentration of the outlet flue gas;
Using the pre-established first computational model, based on the inlet flue gas condition data, the outlet flue gas condition data, the value of the temperature-pressure compensating inlet flue gas flow rate, the ammonia dilution air flow rate and pre- A first calculation module configured to calculate a first corrected ammonia injection amount, wherein the pre-established parameters include a target denitration value, a target ammonia leak rate of the outlet flue gas, a correction factor of NH ₃ , a correction factor of the first target ammonia injection amount, A first calculation module including a number of adsorption towers; And
A second calculation module configured to calculate the first target ammonia dose corresponding to the first corrected ammonia dose using a pre-established second calculation model,
/ RTI > 10. The method of claim 9,
An adjustment module configured to calculate a difference between the first target ammonia injection amount and an actual ammonia injection amount and to adjust the opening degree of the ammonia flow control valve until the difference is smaller than a pre-set threshold based on the difference, The dosing volume is detected by an ammonia flow meter,
. ≪ / RTI > 10. The method of claim 9,
The first calculation module
A first calculation unit configured to calculate a volume per hour of inlet NOX according to the following first formula:
NOX _in = F 11 占Humidity占NOX 11 (first formula)
(At this time, NOX _in the inlet represents the hourly volume of NOX, F 11 is the temperature represents the value of the gas flow pressure compensated inlet flue, Humidity represents the humidity of the inlet flue gas, NOX 11 is the inlet flue gas NOx < / RTI >
A second calculation unit configured to calculate an outlet flue gas flow rate according to the second formula:
F 12 = F 11 + OFF_GAS (second formula)
(Where OFF_GAS represents the ammonia dilution air flow rate and F 12 represents the outlet flue gas flow rate);
A third calculation unit configured to calculate the volume per hour of inlet SO ₂ according to the following third formula:
SO _2in = F Humidity 11 × × 11 SO ₂ (third formulas)
(In this case, SO _2in represents the hourly volume of the inlet SO _2, SO ₂ 11 represents an SO ₂ concentration of the inlet flue gas);
A fourth calculation unit configured to calculate a volume per hour of the outlet SO ₂ according to the following formula:
SO _2out = F 12 × Humidity × SO ₂ 12 (Formula 4)
(In this case, SO _2out represents the hourly volume of the outlet SO _2, SO ₂ 12 represents an SO ₂ concentration in the flue gas exit);
A fifth calculation unit configured to calculate a desulfurization rate of said activated carbon desulfurization and denitrification plant according to the following formula:

(Formula 5)
(Where SO 2 _eff represents the desulfurization rate of the activated carbon desulfurization and denitration plant);
A sixth calculation unit configured to calculate an ammonia injection intermediate variable corresponding to SO ₂ according to the following formula:

(Formula 6)
(In this case, NH3 _SO2 represents the ammonia injection intermediate variable corresponding to a SO _2, NH ₃ _K represents a correction coefficient of the NH ₃ for removing SO ₂ from the flue gas inlet);
A seventh calculation unit configured to calculate an ammonia injection intermediate coefficient corresponding to NOX according to the following formula:

(Formula 7)
(At this time, _NOX NH3 represents the ammonia injected into the intermediate variable corresponding to NOX, _in NOX indicates the hourly volume of the inlet NOX, NOX _ SV represents the target NOx removal values); And
An eighth calculation unit configured to calculate a first corrected ammonia injection amount according to the eighth formula:

(Formula 8)
(At this time, NH _{3cal_corrected_value} represents the first correction injection amount of ammonia, NH ₃ _L denotes a target ammonia leakage of the outlet flue gas)
/ RTI > 10. The method of claim 9,
Wherein the second calculation module comprises:
A ninth calculation unit configured to calculate the first target ammonia injection amount corresponding to the first corrected ammonia injection amount according to the following formula 9:

(Formula 9)
(At this time, NH _{3cal _value} is the first represents the target ammonia injection amount which is a target ammonia injection amount of the adsorption tower, NH _{3correct _value} The value of the claim includes a first correction ammonia injection amount, K _NH3 is the first target ammonia The correction coefficient of the injection amount, and n represents the number of adsorption towers)
/ RTI > 10. The method of claim 9,
Determine whether the first corrected ammonia injection amount exceeds a first pre-set range and whether each of the variables included in the pre-established first calculation model exceeds a second pre-set range corresponding to each variable; When the first corrected ammonia injection amount exceeds the first pre-set range and / or when each of the variables included in the pre-set first calculation model exceeds the second predetermined range of the respective parameters, A first update module configured to update a first corrected ammonia injection amount to a second predetermined corrected ammonia injection amount pre-
. ≪ / RTI > The method according to claim 9 or 13,
A second update module configured to obtain a third corrected ammonia injection amount input by the user and update the first corrected ammonia injection amount to the third corrected ammonia injection amount,
. ≪ / RTI > The method according to claim 9 or 13,
Determine whether the first target ammonia injection amount exceeds a third pre-established range, and whether each of the variables included in the pre-established second calculation model exceeds a fourth pre-established range corresponding to each variable; If the first target ammonia injection amount exceeds the third pre-set range and / or each of the variables of the pre-established second calculation model exceeds the fourth pre-set range corresponding to each variable, A third update module configured to calculate a second target ammonia injection amount according to the tenth formula and update the first target ammonia injection amount to the second target ammonia injection amount;

(Formula 10)
(At this time, NH _{3set _value_ 1} denotes the second target ammonia injection amount, K _p1 is advance by the user - represents a second correction coefficient of the target ammonia injection amount is set, NH3 _NOX is ammonia injection intermediate variable that corresponds to the NOX , And n represents the number of adsorption towers)
. ≪ / RTI > 10. The method of claim 9,
Obtaining a correction factor of the third target ammonia injection amount input by the user; A fourth update module configured to calculate the third target ammonia injection amount and update the first target ammonia injection amount to the third target ammonia injection amount according to the following formula 11:

(Formula 11)
(Where NH 3 _{set_value_2} represents the third target ammonia injection amount and K _p2 represents the correction coefficient of the third target ammonia injection amount)
. ≪ / RTI >

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