CN101644446A - Control method and system of air volume-fuel ratio in preparing carbon black - Google Patents

Abstract

The invention discloses a control method of air volume-fuel ratio in preparing carbon black, comprising the following steps: a) determining effective air volume according to the preset air volume; b)determining the first theory combustion temperature according to the preset furnace box temperature; c) determining the fuel quantity according to the first theory combustion temperature and the preset air volume; and d) supplying fuel and air into a reacting furnace to prepare carbon black according to the fuel quantity and the effective air volume. Compared with the prior art, the invention determines the fuel quantity and the effective air volume respectively according to the preset furnace box temperature and the preset air volume, thus being capable of precisely controlling the ratio between fuel and air volume; the controlling method provided in the invention has good robustness, good stability and high reliability, thus effectively improving the problem that the combustion temperature is difficult to measure, and stable and automatic adjustment of the working condition can still be realized in the case of combustion variety transformation and fuel component alteration.

Description

A kind of control method and system for preparing the wind-combustion ratio of carbon black

Technical field

The present invention relates to the carbon black reaction, be specifically related to a kind of control method and system for preparing the wind-combustion ratio of carbon black.

Background technology

Carbon black mainly is made up of carbon, and its crystallite has the meta anthracite structure, and is concentric orientation, and its particle is to be close to sphere, and mostly clinkering becomes the colloidal particle of aggregation.Carbon black can be as pigment, filler and/or the reinforcing agent in the polymer composition.

Furnace black is the method for the present production carbon black of using always.In furnace black, fuel and an amount of air are formed the high temperature expanding gas in the combustion chamber internal combustion, drive raw material hydrocarbon to spurt into reative cell near velocity of sound, in the extreme time, make the reaction of raw material hydrocarbon generation imperfect combustion, generation is suspended in the carbon black pellet in the flue gas, through collecting behind the technology chilling, behind granulating and drying, be the finished product carbon black more then.

Because the complexity in the carbon black process, the quality of the conversion ratio of carbon black and production carbon black is all relevant with the burning and the thermal cracking processes of hydro carbons simultaneously, and the suitable air volume-fuel ratio of therefore controlling well just can be controlled reacting furnace internal reaction process preferably and obtain quality carbon black preferably.At present, Chang Yong carbon black fuel has ethylene bottom oil, natural gas, coke-stove gas.In the process of production of carbon black, temperature, fuel element, calorific value, flow, temperature, the preheat temperature of combustion air, humidity in the combustion furnace all are the key factors that influences carbon black mass.Because therefore the situation difference of every kind of fuel all needs to set up different combustion models for different fuel, calculates carbon black air volume-fuel ratio in process of production.

Under prior art, when adopting oven process to carry out production of carbon black,, therefore cause the carbon black unstable product quality owing to effectively air volume-fuel ratio is not controlled.Chinese patent literature CN1515631A discloses a kind of carbon black and preparation method thereof.Wherein mention air quantity and fuel has significant effects for carbon black, how air quantity-fuel quantity is not controlled but really provide, because in the carbon black reaction of reality, the situation of air quantity-fuel quantity can change at any time, in above-mentioned patent, the poor controllability of whole carbon black reaction.

Therefore, need a kind of control method of air volume-fuel ratio that can accurately prepare carbon black.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of air volume-fuel ratio control method of carbon black reaction, according to method of the present invention, can control accurately air quantity and fuel in the carbon black reaction effectively.

In order to solve above technical problem, the invention provides a kind of control method of air volume-fuel ratio for preparing carbon black, comprise step:

A) determine effective wind rate by default air quantity;

B) determine first theoretical temperature combustion according to default fire box temperature;

C) determine fuel quantity according to first theoretical temperature combustion and described default air quantity;

D) in reacting furnace, infeed fuel and air according to described fuel quantity and effective wind rate.

Preferably, described step a) comprises step:

A1) adopt the default air quantity of standard orifice plate model measurement;

A2) calculate effective wind rate according to described default air quantity by formula (1):

$Q_{\mathrm{Vx}}=V_k\×\sqrt{\frac{P_0}{\mathrm{\Δ}{P}_0\×T_0}}\×\sqrt{\frac{\mathrm{\Δ}{P}_x\×T_x}{P_x\×(1-0.3780\×x_V)}}---\left(1\right)$

In the formula (1), Q _VxThe expression effective wind rate, unit is m ³/ h; V _kThe default air quantity of expression, unit is m ³/ h; P _OThe expression system pressure, unit is kpa; T _OThe expression design temperature, unit is ℃; Δ P _xExpression orifice plate differential pressure, unit is kpa; T _xThe expression observed temperature, unit is ℃ X _vExpression steam percentage composition.

Preferably, the standard orifice plate model described step a1) calculates air quantity and is specially according to formula (2) measurement actual air volume:

$V_k=K\×\sqrt{\frac{\mathrm{\ΔP}}{\mathrm{\ρ}}}---\left(2\right)$

In the formula (2), V _kThe default air quantity of expression, unit is m ³/ h; K represents the orifice plate characteristic coefficient; Δ P _OThe expression air pressure difference, unit is kpa; ρ represents atmospheric density, and unit is g/L.

Preferably, described atmospheric density ρ calculates by formula (3):

$\mathrm{\ρ}=3.48353*\frac{P}{\mathrm{ZT}}(1-0.378\frac{P_S}{P})---\left(3\right)$

In the formula (3), ρ represents atmospheric density, and P represents air pressure, and unit is kpa; P _SRepresent airborne water vapour pressure, unit is kpa; Z is the air compressibility factor, and unit is kg/m ³T represents air themperature, and unit is ℃.

Preferably, described air compressibility factor Z adopts the virial equation trinomial shown in the formula (4) to calculate:

$Z=1+\frac{B}{\mathrm{RT}}P+C^{\′}{P}^2---\left(4\right)$

In the formula (4), R is the proportionality constant of perfect gas, and unit is J/ (molK); B represents second virial coefficient; C represents coefficient in the third dimension.

Preferably, described step b) adopts formula (5) to determine first theoretical temperature combustion by preset temperature:

$T=\mathrm{To}\×{\left(\frac{P}{P_O}\right)}^{\frac{k-1}{k}}---\left(5\right)$

In the formula (5), To represents first theoretical temperature combustion, and unit is ℃; P represents internal pressure of combustion chamber, and unit is kpa; P _OThe expression air pressure, unit is kpa; K represents the combustion product adiabatic exponent.

Preferably, use formula (6) to determine fuel quantity according to first theoretical temperature combustion and described default air quantity in the described step c):

In the formula (6), Q _EmptyThe physics heat that the expression air is brought into, unit is kJ; Q _LowExpression fuel oil calorific capacity, unit is kJ; Q _CombustionThe physics heat that expression fuel is brought into; C _ProduceThe comprehensive hot melt of expression combustion product, unit is kJ/m ³℃; V _nExpression combustion product volume, unit is m ³

In the formula (6), Q _EmptyAdopt formula (7) to calculate:

Q _Empty=C _EmptyT _kV _k(7)

In the formula (7), C _EmptyExpression air hot melt, unit is kJ/m ³℃; T _kThe expression air preheating temperature, unit is ℃; V _kThe default air quantity of expression, unit is m ³/ h;

In the formula (6), Q _LowAdopt formula (8) to calculate:

Q _Low=W * (12400-2100 * 1.0536 * 1.0536) * 4.2

In the formula (8), W is a fuel quantity;

In the formula (6), Q _CombustionAdopt formula (9) to calculate:

Q _Combustion=WC _CombustionT _y(9)

In the formula (9), W is a fuel quantity, and unit is kg/h; C _CombustionExpression fuel hot melt, unit is kJ/m ³℃; T _yExpression fuel preheat temperature, unit is ℃.

The present invention also provides a kind of control system of using in the described control method of above each technical scheme, comprising:

Input air unit, described input air unit is determined effective wind rate according to default air quantity;

Fuel unit, described fuel unit is determined first theoretical temperature combustion and is determined fuel quantity according to first theoretical temperature combustion and described default air quantity according to default fire box temperature;

The ratio regulon: described ratio regulon is determined air volume-fuel ratio according to described fuel quantity and effective wind rate;

The reactor fuel element: the air volume-fuel ratio that described reactor fuel element is determined according to described ratio regulon infeeds fuel and component in reacting furnace.

Preferably, described input air unit comprises:

The air measuring unit, actual air volume is measured in described air measuring unit

Air quantity compensation computing unit, described air quantity compensation computing unit is measured effective wind rate according to actual air volume.

The invention provides a kind of control method of air volume-fuel ratio for preparing carbon black.Compared with prior art, the present invention determines fuel quantity and determines effective wind rate by default air quantity according to default fire box temperature, can accurately control fuel and air quantity ratio, control method strong robustness provided by the invention, good stability, the reliability height, improve the problem that ignition temperature is difficult to measure effectively, under the situation of burning kind conversion and propellant composition change, still can realize stable, the adjusting automatically of operating mode.

Description of drawings

Fig. 1 is the flow chart of the control method of air volume-fuel ratio of preparation carbon black of the present invention;

Fig. 2 is the control system schematic diagram of the air volume-fuel ratio of control carbon black reaction of the present invention.

The specific embodiment

In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, but should be appreciated that these describe just to further specifying the features and advantages of the present invention, rather than to the restriction of claim of the present invention.

See also Fig. 1 and Fig. 2, Fig. 1 is a kind of flow chart of embodiment of the control method of air volume-fuel ratio of preparation carbon black provided by the invention; Fig. 2 is the schematic diagram of control system of the air volume-fuel ratio of control carbon black provided by the invention reaction.In the present embodiment, with ethylene bottom oil act as a fuel, liquid hydrocarbon is as the feedstock production carbon black, the control method to gas-fuel ratio comprises step:

A): input air unit is according to default air quantity V _kDetermine effective wind rate Q _Vx

In the production process of furnace black, the needed air that burns is to carry by main air feed machine, at first carries out preheating by preheater before advancing reacting furnace, and burning zone and fuel that the air after the preheating enters into reacting furnace carry out combustion reaction.Because in whole combustion process, participate in the airborne oxygen that has only of reaction, the aerial ratio of oxygen is considered to constant, but because the humidity of air can be along with the zone and the different differences to some extent in season, therefore final effective wind rate should be the dry air amount of removing steam.In the S1 step, comprise following substep:

A1): default air quantity is measured in the air measuring unit

The measurement of air quantity generally all adopts standard orifice plate as measuring cell, and the measuring principle of standard orifice plate is shown below:

$V_k=K\×\sqrt{\frac{\mathrm{\ΔP}}{\mathrm{\ρ}}}---\left(2\right)$

K in the formula (2) is an orifice plate characteristic coefficient of colligation well known to those skilled in the art, can find in the orifice plate design manual; Δ P represents the pressure differential of pore plate flow measurement; Atmospheric density ρ calculates according to air themperature, air pressure, humidity.

When calculating ρ, when containing steam in the air, because water-vapo(u)r density equals 0.622 times of dry air density, so under identical temperature and pressure condition, humid air is always light than dry air.If vapour pressure is Ps in the humid air, then the pressure of dry air may be calculated P-Ps, and the formula that therefore calculates ρ is shown in (3):

$\mathrm{\ρ}=3.48353*\frac{P}{\mathrm{ZT}}(1-0.378\frac{P_S}{P})---\left(3\right)$

Z in the formula (3) is the air compressibility factor, and unit is kg/m ³, the T in the formula (2) represents air themperature, unit is ℃.

During air compressibility factor Z in computing formula (3), can adopt state equation to advance calculation, preferably use three clean cut systems of virial equation:

$Z=1+\frac{B}{\mathrm{RT}}P+C^{\′}{P}^2---\left(4\right)$

B in the formula (4) is a second virial coefficient, and C ' is an incidence coefficient in the third dimension, specifically adopts formula (5) to calculate:

C in the formula (5) is a coefficient in the third dimension, and R is the proportionality constant of perfect gas, and unit is J/ (molK).

Use formula (2) to measure actual air volume V _kAfter, carrying out step a2) the air quantity compensating unit is according to described actual air volume V _kCalculate effective wind rate Q _Vx

$Q_{\mathrm{Vx}}=V_k\×\sqrt{\frac{P_0}{\mathrm{\Δ}{P}_0\×T_0}}\×\sqrt{\frac{\mathrm{\Δ}{P}_x\×T_x}{P_x\×(1-0.3780\×x_V)}}---\left(1\right)$

In the formula (1), Q _VxThe expression effective wind rate, unit is m ³/ h; V _kThe default air quantity of expression, unit is m ³/ h; P _OThe expression system pressure, unit is kpa; T _OThe expression design temperature, unit is ℃; Δ P _xExpression orifice plate differential pressure, unit is kpa; T _xThe expression observed temperature, unit is ℃ X _vExpression steam percentage composition.

Input air unit is determined Q behind the effective wind rate according to said process _Vx, according to described effective wind rate Q _VxAir-supplied in reacting furnace.

After the step a), carry out step b): fuel unit is determined first theoretical temperature combustion according to formula (5) according to default fire box temperature;

$T=\mathrm{To}\×{\left(\frac{P}{P_O}\right)}^{\frac{k-1}{k}}---\left(5\right)$

In the formula (5), T represents default fire box temperature, and unit is ℃; To represents first theoretical temperature combustion, and unit is ℃; P _OThe expression internal pressure of combustion chamber, unit is kpa; P represents air pressure, and unit is kpa; K represents the combustion product adiabatic exponent.

In step b), determine the first theoretical temperature combustion To after, carry out step c) and use formula (6) to determine fuel quantity according to first theoretical temperature combustion and described default air quantity;

In the formula (6), Q _EmptyThe physics heat that the expression air is brought into, unit is kJ; Q _LowExpression fuel oil calorific capacity, unit is kJ; Q _CombustionThe physics heat that expression fuel is brought into; C _ProduceThe comprehensive hot melt of expression combustion product, unit is kJ/m ³℃; V _nExpression combustion product volume, unit is m ³

In the formula (6), Q _EmptyAdopt formula (7) to calculate:

Q _Empty=C _EmptyT _kV _k(7)

In the formula (7), C _EmptyExpression air hot melt, unit is kJ/m ³℃; T _kThe expression air preheating temperature, unit is ℃; V _kThe default air quantity of expression, unit is m ³/ h;

In the formula (6), Q _LowAdopt formula (8) to calculate:

Q _Low=W * (12400-2100 * 1.0536 * 1.0536) * 4.2

In the formula (8), W is a fuel quantity, and other numerical value is the ethylene bottom oil empirical value;

In the formula (6), Q _CombustionAdopt formula (9) to calculate:

Q _Combustion=WC _CombustionT _y(9)

In the formula (9), W is a fuel quantity, and unit is kg/h; C _CombustionExpression fuel hot melt, unit is kJ/m ³℃; T _yExpression fuel preheat temperature, unit is ℃.

In step c), determine fuel quantity after, carry out step d): the ratio regulon is determined air volume-fuel ratio according to described fuel quantity and effective wind rate, fuel unit infeeds fuel according to described air volume-fuel ratio and air prepares carbon black in reacting furnace then.

Below with specific embodiment the control method of air volume-fuel ratio of preparation carbon black provided by the invention is described:

Embodiment 1

Initial data is as follows:

Fuel is ethylene bottom oil, and gas is normal air, and water loading of the air is according to saturated steam cubage under the isothermy, and the volume of air is 22.4m under the standard state ³/ kmol, the volume fraction of oxygen and nitrogen is respectively 21% and 79% in the air.

The mass percent of carbon is 91.44% in the ethylene bottom oil, and the mass percent of protium is 7.68%, and ethylene bottom oil severe is 1.0536, ethylene bottom oil preheat temperature T _y=130 ℃, fuel air preset flow V _k=1343m ³/ h, air preheating temperature T _k=650 ℃, burner hearth preset temperature T is 1836 ℃.

The hot melt of known gas: Be 1.9284kI/m ³℃;

Be 3.2207kI/m ³℃;

Be 2.7284kI/m ³℃;

Be 2.0251kI/m ³℃;

Can determine the hot melt of air according to the volume content of the hot melt of known gas and airborne oxygen and nitrogen

The control method of present embodiment is according to following steps:

S1: determine the first theoretical temperature combustion To by formula (5):

$T=\mathrm{To}\×{\left(\frac{P}{P_O}\right)}^{\frac{k-1}{k}}---\left(5\right)$

In the formula (5), air pressure P is 110.325kpa, supposes that the combustion chamber gauge pressure is 40kpa, then internal pressure of combustion chamber P _OBe 110.325+40=150.325kpa.

In addition, after the ethylene bottom oil combustion reaction, the gas component in the reacting furnace is respectively: CO ₂, N ₂, H ₂O, O ₂, see also table 1 and be the adiabatic exponent of several gas components under different temperatures in the reacting furnace:

The adiabatic exponent of gas component in table 1, the reacting furnace

Adiabatic exponent is calculated according to formula (11):

$\frac{1}{k-1}=\mathrm{\Σ}\frac{c_i}{k_i-1},---\left(11\right)$

In the formula (11), c _iThe hot melt of expression gas will

,

,

,

Bring table 1 into, obtain the gas adiabatic exponent in the reacting furnace shown in the table 2 after the calculating.

Gas adiabatic exponent in table 2, the reacting furnace

Adiabatic exponent, preset temperature, air pressure and internal pressure of combustion chamber brought into to obtain the first theoretical temperature combustion To behind the formula (5) be 1711 ℃.

S2: after determining the first theoretical temperature combustion To, determine fuel quantity, suppose that fuel quantity is W according to the first theoretical temperature combustion To.

During computing fuel level, need to determine following data: water in air content M, completing combustion consumed cabin air amount Lo, air consumption coefficient η, actual air consumption La, combustion product growing amount, combustion product hot melt.

S21) utilize formula (12) to determine water in air content M:

M=V _k* ρ _Air* H (12)

In the formula (12), V _kThe default air quantity of expression, unit is m ³/ h; ρ _AirExpression combustion air density is got 1.293kg/m here ³H represents combustion air humidity, and unit is kg water/kg air.

Wherein, air humidity H adopts formula (13) to calculate:

In the formula (13),

The expression relative air humidity gets 65% here; P _WaterExpression water in air partial vapour pressure is got 3.1691kpa here; P _AlwaysThe expression air pressure is got 101.66kpa here.

Bring above-mentioned numerical value into formula (12)

$M=1343\×1.293\×0.622\×0.65\×\frac{3.1691}{101.66-3.1691}=22.590\mathrm{kg}/h---\left(12\right)$

S13) utilize formula (14) to calculate completing combustion consumed cabin air amount Lo

In the formula (14), ρ _AirBe atmospheric density, get 1.293.

S13) utilize formula (15) to calculate complete air consumption coefficient η:

$\mathrm{\η}=\frac{V_k}{L_O}---\left(15\right)$

S14) actual air consumption La:

Actual air consumption La equals default air quantity.

S15) calculate the combustion product growing amount:

CO in the combustion product ₂Calculate according to formula (16):

$V_{{\mathrm{CO}}_2}=91.44\%\×W\×22.4\÷12---\left(16\right)$

N in the combustion product ₂Calculate according to formula (17):

$V_{N_2}=79\%\×\mathrm{La}---\left(17\right)$

H in the combustion product ₂O calculates according to formula (18):

$V_{H_{2}O}=W\×7.68\%\÷2\×22.4+M\÷0.804$

O in the combustion product ₂Calculate according to formula (19):

$V_{O_2}=21\%\×(\mathrm{La}-\mathrm{Lo})---\left(19\right)$

Can calculate the cumulative volume of combustion product according to each content of forming of above combustion product:

$V_n=V_{{\mathrm{CO}}_2}+V_{H_{2}O}+V_{N_2}+V_{O_2}---\left(20\right)$

Then the percent by volume of each component in the combustion product is respectively

${\mathrm{CO}}_2\%=V_{{\mathrm{CO}}_2}/V_n\%;---\left(21\right)$

$H_{2}O\%=V_{H_{2}O}/V_n\%;---\left(22\right)$

$N_2\%=V_{N_2}/V_n\%;---\left(23\right)$

$O_2\%=V_{O_2}/V_n\%---\left(24\right)$

S16) calculate combustion product hot melt C _Produce

For the first theoretical temperature combustion To, coincidence formula (6)

In the formula (6), C _ProduceThe comprehensive hot melt of expression combustion product, unit is kJ/m ³℃; V _nExpression combustion product volume, unit is m ³

In the formula (6), Q _EmptyAdopt formula (7) to calculate:

Q _Empty=C _EmptyT _kV _k(7)

In the formula (7), C _EmptyExpression air hot melt, unit is kJ/m ³℃; T _kThe expression air preheating temperature, unit is ℃; V _kThe default air quantity of expression, unit is m ³/ h;

In the formula (6), Q _LowAdopt formula (8) to calculate:

Q _Low=W * (12400-2100 * 1.0536 * 1.0536) * 4.2 (8)

In the formula (8), W is a fuel quantity;

In the formula (6), Q _CombustionAdopt formula (9) to calculate:

Q _Combustion=WC _CombustionT _y(9)

In the formula (9), W is a fuel quantity, and unit is kg/h; C _CombustionExpression fuel hot melt, unit is kJ/m ³℃; T _yExpression fuel preheat temperature, unit is ℃.

Wherein, calculate C _CombustionThe time, can adopt empirical equation (26) to calculate:

C _Combustion=0.416+0.0006T _y(26)

In the formula (26), T _yThe expression air preheating temperature.

The calculating formula and the first theoretical temperature combustion T of fuel quantity W will be comprised in formula (7), (8) and (9) _oAfter bringing formula (6) into, can calculate fuel quantity W is 83.8kg/h.

At last, determine fuel quantity after, when reacting, in reacting furnace, infeed the fuel ethylene bottom oil according to described fuel quantity 83.8kg/h.

More than used specific case principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.

Claims (9)

1, a kind of control method of air volume-fuel ratio for preparing carbon black comprises step:

A) determine effective wind rate by default air quantity;

B) determine first theoretical temperature combustion according to default fire box temperature;

C) determine fuel quantity according to first theoretical temperature combustion and described default air quantity;

D) according to described fuel quantity with effective wind rate infeeds fuel in reacting furnace and air prepares carbon black.

2, control method according to claim 1 is characterized in that step a) comprises step:

A1) adopt the default air quantity of standard orifice plate model measurement;

A2) calculate effective wind rate according to described default air quantity by formula (1):

$Q_{\mathrm{Vx}}=V_k\×\sqrt{\frac{P_0}{\mathrm{\Δ}{P}_0\×T_0}}\×\sqrt{\frac{\mathrm{\Δ}{P}_x\×T_x}{P_x\×(1-0.3780\×x_V)}}---\left(1\right)$

In the formula (1), Q _VxThe expression effective wind rate, unit is m ³/ h; V _kThe default air quantity of expression, unit is m ³/ h; P _OThe expression system pressure, unit is kpa; T _OThe expression design temperature, unit is ℃; Δ P _xExpression orifice plate differential pressure, unit is kpa; T _xThe expression observed temperature, unit is ℃ X _vExpression steam percentage composition.

3, control method according to claim 2 is characterized in that described step a1) in the standard orifice plate model calculate air quantity and be specially according to formula (2) and measure actual air volume:

$Q_{V0}=K\×\sqrt{\frac{\mathrm{\ΔP}}{\mathrm{\ρ}}}---\left(2\right)$

In the formula (2), V _kThe default air quantity of expression, unit is m ³/ h; K represents the orifice plate characteristic coefficient; Δ P _OThe expression air pressure difference, unit is kpa; ρ represents atmospheric density, the g/L of unit.

4, control method according to claim 3 is characterized in that described atmospheric density calculates by formula (3):

$\mathrm{\ρ}=3.48353*\frac{P}{\mathrm{ZT}}(1-0.378\frac{P_S}{P})---\left(3\right)$

In the formula (3), ρ represents atmospheric density, and P represents air pressure, and unit is kpa; P _SRepresent airborne water vapour pressure, unit is kpa; Z is the air compressibility factor; T represents air themperature, and unit is ℃.

5, control method according to claim 4 is characterized in that described air compressibility factor adopts the virial equation trinomial shown in the formula (4) to calculate:

$Z=1+\frac{B}{\mathrm{RT}}P+C^{\′}{P}^2---\left(4\right)$

In the formula (4), R is the proportionality constant of perfect gas, and unit is J/ (molK); B represents second virial coefficient; C represents coefficient in the third dimension.

6,, it is characterized in that described step b) adopts formula (5) to determine first theoretical temperature combustion by default fire box temperature according to each described control method of claim 1 to 5:

$T=\mathrm{To}\×{\left(\frac{P}{P_O}\right)}^{\frac{k-1}{k}}---\left(5\right)$

In the formula (5), T represents default fire box temperature, and unit is ℃; To represents first theoretical temperature combustion, and unit is ℃; P represents internal pressure of combustion chamber, and unit is kpa; P _OThe expression air pressure, unit is kpa; K represents the combustion product adiabatic exponent.

7, control method according to claim 6 is characterized in that using formula (6) to determine fuel quantity according to first theoretical temperature combustion and described default air quantity in the described step c):

In the formula (6), Q _EmptyThe physics heat that the expression air is brought into, unit is kJ; Q _LowExpression fuel oil calorific capacity, unit is kJ; Q _CombustionThe physics heat that expression fuel is brought into; C _ProduceThe comprehensive hot melt of expression combustion product, unit is kJ/m ³℃; V _nExpression combustion product volume, unit is m ³

In the formula (6), Q _EmptyAdopt formula (7) to calculate:

Q _Empty=C _EmptyT _kV _k(7)

In the formula (7), C _EmptyExpression air hot melt, unit is kJ/m ³℃; T _kThe expression air preheating temperature, unit is ℃; V _kThe default air quantity of expression, unit is m ³/ h;

In the formula (6), Q _LowAdopt formula (8) to calculate:

Q _Low=W * (12400-2100 * 1.0536 * 1.0536) * 4.2

In the formula (8), W is a fuel quantity;

In the formula (6), Q _CombustionAdopt formula (9) to calculate:

Q _Combustion=WC _CombustionT _y(9)

In the formula (9), W is a fuel quantity, and unit is kg/h; C _CombustionExpression fuel hot melt, unit is kJ/m ³℃; T _yExpression fuel preheat temperature, unit is ℃.

8, a kind of control system of using in each described control method of claim 1 to 7 comprises:

Input air unit, described input air unit is determined effective wind rate according to default air quantity;

Fuel unit, described fuel unit is determined first theoretical temperature combustion and is determined fuel quantity according to first theoretical temperature combustion and described default air quantity according to default fire box temperature;

The ratio regulon: described ratio regulon is determined air volume-fuel ratio according to described fuel quantity and effective wind rate;

The reactor fuel element: the air volume-fuel ratio that described reactor fuel element is determined according to described ratio regulon infeeds fuel and air in reacting furnace.

9, control system according to claim 8 is characterized in that described input air unit comprises:

The air measuring unit, actual air volume is measured in described air measuring unit

Air quantity compensation computing unit, described air quantity compensation computing unit is measured effective wind rate according to actual air volume.

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