CN103409571A - Charging bucket weighing differential fuzzy compensation system for serial bucket-type bell-less top - Google Patents

Abstract

The invention provides a charging bucket weighing differential fuzzy compensation system for a serial bucket-type bell-less top. The charging bucket weighing differential fuzzy compensation system comprises an under-groove weighed value acquisition module, a pressure-equalizing process data acquisition module, a charging bucket weighing differential fuzzy compensation modelling module connected with the under-groove weighed value acquisition module and the pressure-equalizing process data acquisition module, a discharging process data acquisition module, a real-time differential compensation coefficient calculation module connected with the charging bucket weighing differential fuzzy compensation modelling module and the discharging process data acquisition module, and a discharging process weight fuzzy compensation module connected with the real-time differential compensation coefficient calculation module and the discharging process data acquisition module. According to the charging bucket weighing differential fuzzy compensation system provided by the invention, pressures acquired in a primary pressure-equalizing process and a secondary pressure-equalizing process for charging buckets in real time, and charging bucket weighing data are adequately utilized for performing online fuzzy modelling on a charging bucket weighing differential compensation coefficient, so as to obtain a nonlinear physical relationship between the difference of a furnace top pressure and a charging bucket pressure, and the charging bucket weighing differential compensation coefficient, thus the technical problem of the drift of the differential compensation coefficient caused by the external factors of a blast furnace is effectively solved.

Description

The string tank is without the batch can of the bell furnace roof differential pressure fuzzy compensation system of weighing

Technical field

The invention belongs to the technical field of blast furnace ironmaking without the bell furnace roof, relate in particular to a kind of tank of going here and there without the batch can of the bell furnace roof differential pressure fuzzy compensation system of weighing.

Background technology

Along with the development of smelting technology, current blast furnace generally adopts without the bell furnace roof and carries out cloth, have the string tank without bell tank without bell, three tanks without bell and two clock four valve types etc.The tank of wherein going here and there occupies dominant position without bell, is building on large blast furnace at present, basically all adopts the charging technique of string tank without the bell system.In order to improve blast-furnace smelting efficiency, also more and more higher to the technical requirements that becomes more meticulous of cloth.Due to the restriction of the severe production environment of blast furnace roof and instrumentation mounting condition, make without the weighing of bell furnace roof and detect and become a technical barrier in this area.

Blast furnace roof weighting method cloth has become the application trend of blast furnace material distribution technology, and the precondition of weighting method cloth is exactly the accurate weighing that batch can claims.Blast furnace furnace top pressure when normal production can be in the high pressure conditions of 1.5～2.5 kilograms, batch can is subject to the buoyancy made progress under the effect of furnace top pressure, and the furnace top pressure fluctuation also can cause the buoyancy fluctuation, therefore must adopt the differential pressure compensation system to compensate the impact of furnace top pressure on the batch can value of weighing.

Weighing differential pressure compensation technical scheme commonly used is linear compensation method at present, and this method can not be revised in real time to the linear compensation coefficient, can not continue to guarantee the Stability and veracity of the batch can value of weighing.At publication number, be CN101985669A, denomination of invention is in the patent of invention of " the differential pressure compensation self-correction method that the furnace roof batch can is weighed ", a kind of method of proofreading and correct weighing differential pressure compensation coefficient with the equalising means of cycle memory has been described, although the method can effectively solve the technical problem of the linear compensation coefficient drift that the blast furnace external factors cause, but production practice show, the method is excessive for the susceptibility of " bad point " take off data, when due to bad working environments, causing furnace top pressure or batch can weighing value seriously not to tend on time cause the fluctuation of self-correction linear compensation coefficient, and the removal mechanisms at work that there is no " bad point " data, make these data may affect the self-correction result of back always, the hidden danger that exists the self-correction result further to worsen.Steadily direct motion is the key technical index that blast furnace is produced, and should avoid the fluctuation of operating conditions caused because of the big ups and downs of linear compensation coefficient as far as possible.

Summary of the invention

The technical problem to be solved in the present invention is: provide a kind of tank of going here and there without the batch can of the bell furnace roof differential pressure fuzzy compensation system of weighing, effectively solve the technical problem that drift occurs for pressure difference compensation coefficient that the blast furnace external factors cause.

The present invention solves the problems of the technologies described above the technical scheme of taking to be: a kind of tank of going here and there is without the batch can of the bell furnace roof differential pressure fuzzy compensation system of weighing, and it is characterized in that: it comprises:

Groove is called the value acquisition module in the following text, for after the batch can charging is complete, reads the material Baking soda of blast furnace lower-weighing measuring system and calls value W in the following text _{Under groove}

The pressure equalizing data acquisition module, for once all pressing at batch can and the secondary pressure equalizing reads in batches the n group and expects heavily weighing value W _i, furnace top pressure P _iWith batch can force value T _i, wherein i be batch can once all press and the secondary pressure equalizing in the i group of reading of data in batches;

The batch can differential pressure fuzzy compensation MBM of weighing, call the value acquisition module in the following text with described groove and be connected with the pressure equalizing data acquisition module, calls value W in the following text be used to receiving the material Baking soda _{Under groove}, expect heavily weighing value W _i, furnace top pressure P _iWith batch can force value T _i, and set up the fuzzy inference rule of pressure difference compensation coefficient and define its broad sense input variable and fuzzy membership functions corresponding to fuzzy set, obtain going here and there tank without the weigh computation model parameter of differential pressure compensation coefficient of the batch can of bell furnace roof;

The discharge process data acquisition module, the signal value sent in real time for periodically reading the heavy weight transmitter of batch can discharge process furnace top pressure transmitter, batch can pressure unit and material: furnace roof real-time pressure P _{Furnace roof}, batch can real-time pressure T _{Batch can}With the real-time weighing value of material W _Weighing

Real-time differential pressure compensation coefficients calculation block, with the described batch can differential pressure fuzzy compensation MBM of weighing, be connected with the discharge process data acquisition module, for receiving the string tank without the weigh computation model parameter of differential pressure compensation coefficient of the batch can of bell furnace roof, receive simultaneously furnace roof real-time pressure P _{Furnace roof}, batch can real-time pressure T _{Batch can}, the difference △ P=P of calculating furnace top pressure and batch can pressure _{Furnace roof}-T _{Batch can}With real-time differential pressure compensation COEFFICIENT K (△ P);

Discharge process material molality is stuck with paste compensating module, is connected with the discharge process data acquisition module with described real-time differential pressure compensation coefficients calculation block, be used to receiving real-time differential pressure compensation COEFFICIENT K (△ P), receives simultaneously furnace roof real-time pressure P _{Furnace roof}, batch can real-time pressure T _{Batch can}With the real-time weighing value of material W _Weighing, press the weight of material value W after the compensation calculation formula calculates compensation according to the discharge process material method of double differences _{Material is heavy}, and by W _{Material is heavy}Send to the weighting method cloth of furnace roof batch can cloth control system for blast furnace.

Press such scheme, the fuzzy inference rule that described batch can is weighed in differential pressure fuzzy compensation MBM is:

IF(△P–(P ₁-T ₁))is?F ₁and(△P–(P ₂-T ₂))is?F ₂,and…,and(△P–(P _n-T _n))is?F _n，

Wherein, △ P is the poor of furnace top pressure and batch can pressure; F _iFor (△ P – (P _i-T _i)) corresponding fuzzy subset, comprise two Linguistic Values of positive P and negative N, work as F _iDuring for positive P, corresponding

Before get+number, work as F _iDuring for negative N, corresponding

Before get-number, therefore above-mentioned fuzzy inference rule has 2 ⁿBar;

Broad sense input variable x in ambiguity in definition inference rule _i:

x _i=△P–(P _i-T _i)；

Then get broad sense input variable x _iThe corresponding positive P of fuzzy set and the fuzzy membership functions of negative N are respectively μ _P(x _i) and μ _N(x _i):

$\left\{\begin{array}{c}{\mathrm{\μ}}_P\left(x_i\right)=e^{-{\frac{1}{2}(x_i-k_i)}^2}\\ {\mathrm{\μ}}_N\left(x_i\right)=e^{-\frac{1}{2}{(x_i+k_i)}^2}\end{array}\right.;$

In formula, k _iFor being more than or equal to 0 constant.

Press such scheme, in described real-time differential pressure compensation coefficients calculation block, the calculation formula of real-time differential pressure compensation COEFFICIENT K (△ P) is:

Wherein e is exponential function.

Press such scheme, described discharge process material molality is stuck with paste the discharge process material method of double differences in compensating module and is pressed the compensation calculation formula to be:

W _{Material is heavy}=W _Weighing+ K (Δ P) * (P _{Furnace roof}-T _{Batch can})-W _{Net weight}-k * Δ x,

W wherein _{Net weight}Without the weight of bell batch can own, k is the Young's modulus that is attached to the tank body upper spring for the string tank, and Δ x is the deformation quantity that is attached to the tank body upper spring, and Δ x value remains unchanged in the cloth process.

Beneficial effect of the present invention is:

1, take full advantage of that batch can is once all pressed and the secondary pressure equalizing in the pressure of Real-time Collection and batch can weighing data the batch can pressure difference compensation coefficient of weighing is carried out to the On-line Fuzzy modeling, the difference that obtains furnace top pressure and batch can pressure is with weigh nonlinear physics relation between the pressure difference compensation coefficient of batch can, can effectively solve the pressure difference compensation coefficient that the blast furnace external factors cause the technical problem of drifting about occurs;

2, will without the weigh computation model of differential pressure compensation coefficient of the batch can of bell furnace roof, be applied to the material method of double differences in the batch can discharge process and press offset to calculate online link based on the string tank of online process data, guaranteed the accurate control of weighting method cloth process, make the blast furnace bell-less cloth system can stablize, evenly, accurately control the cloth flow, significantly improve the smelting level of blast furnace ironmaking, adapt to the time-varying characteristics of blast furnace production process fully.

The accompanying drawing explanation

Fig. 1 is the structural representation of one embodiment of the invention.

Fig. 2 is the method flow diagram of one embodiment of the invention.

Fig. 3 is that the hardware system of one embodiment of the invention forms structure iron.

Fig. 4 be one embodiment of the invention once with the secondary pressure equalizing in 30 groups of process data distribution plans gathering.

Embodiment

The present invention will be further described below in conjunction with specific examples and accompanying drawing.

Fig. 1 is the structural representation of one embodiment of the invention, and it comprises:

Groove is called the value acquisition module in the following text, for after the batch can charging is complete, reads the material Baking soda of blast furnace lower-weighing measuring system and calls value W in the following text _{Under groove}

The pressure equalizing data acquisition module, for once all pressing at batch can and the secondary pressure equalizing reads in batches the n group and expects heavily weighing value W _i, furnace top pressure P _iWith batch can force value T _i, wherein i be batch can once all press and the secondary pressure equalizing in the i group of reading of data in batches;

The batch can differential pressure fuzzy compensation MBM of weighing, call the value acquisition module in the following text with described groove and be connected with the pressure equalizing data acquisition module, calls value W in the following text be used to receiving the material Baking soda _{Under groove}, expect heavily weighing value W _i, furnace top pressure P _iWith batch can force value T _i, and set up the fuzzy inference rule of pressure difference compensation coefficient and define its broad sense input variable and fuzzy membership functions corresponding to fuzzy set, obtain going here and there tank without the weigh computation model parameter of differential pressure compensation coefficient of the batch can of bell furnace roof;

The discharge process data acquisition module, the signal value sent in real time for periodically reading the heavy weight transmitter of batch can discharge process furnace top pressure transmitter, batch can pressure unit and material: furnace roof real-time pressure P _{Furnace roof}, batch can real-time pressure T _{Batch can}With the real-time weighing value of material W _Weighing

Real-time differential pressure compensation coefficients calculation block, with the described batch can differential pressure fuzzy compensation MBM of weighing, be connected with the discharge process data acquisition module, for receiving the string tank without the weigh computation model parameter of differential pressure compensation coefficient of the batch can of bell furnace roof, receive simultaneously furnace roof real-time pressure P _{Furnace roof}, batch can real-time pressure T _{Batch can}, the difference △ P=P of calculating furnace top pressure and batch can pressure _{Furnace roof}-T _{Batch can}With real-time differential pressure compensation COEFFICIENT K (△ P);

Discharge process material molality is stuck with paste compensating module: with described real-time differential pressure compensation coefficients calculation block, be connected with the discharge process data acquisition module, be used to receiving real-time differential pressure compensation COEFFICIENT K (△ P), receive simultaneously furnace roof real-time pressure P _{Furnace roof}, batch can real-time pressure T _{Batch can}With the real-time weighing value of material W _Weighing, press the weight of material value W after the compensation calculation formula calculates compensation according to the discharge process material method of double differences _{Material is heavy}, and by W _{Material is heavy}Send to the weighting method cloth of furnace roof batch can cloth control system for blast furnace.

The fuzzy inference rule that described batch can is weighed in differential pressure fuzzy compensation MBM is:

IF(△P–(P ₁-T ₁))is?F ₁and(△P–(P ₂-T ₂))is?F ₂,and…,and(△P–(P _n-T _n))is?F _n，

Wherein, △ P is the poor of furnace top pressure and batch can pressure; F _iFor (△ P – (P _i-T _i)) corresponding fuzzy subset, comprise two Linguistic Values of positive P and negative N, work as F _iDuring for positive P, corresponding

Before get+number, work as F _iDuring for negative N, corresponding

Before get-number, therefore above-mentioned fuzzy inference rule has 2 ⁿBar;

Broad sense input variable x in ambiguity in definition inference rule _i:

x _i=△P–(P _i-T _i)；

Then get broad sense input variable x _iThe corresponding positive P of fuzzy set and the fuzzy membership functions of negative N are respectively μ _P(x _i) and μ _N(x _i):

$\left\{\begin{array}{c}{\mathrm{\μ}}_P\left(x_i\right)=e^{-{\frac{1}{2}(x_i-k_i)}^2}\\ {\mathrm{\μ}}_N\left(x_i\right)=e^{-\frac{1}{2}{(x_i+k_i)}^2}\end{array}\right.;$

In formula, k _iFor being more than or equal to 0 constant.

In described real-time differential pressure compensation coefficients calculation block, the calculation formula of real-time differential pressure compensation COEFFICIENT K (△ P) is:

Wherein e is exponential function.

Described discharge process material molality is stuck with paste the discharge process material method of double differences in compensating module and is pressed the compensation calculation formula to be:

W _{Material is heavy}=W _Weighing+ K (Δ P) * (P _{Furnace roof}-T _{Batch can})-W _{Net weight}-k * Δ x

W wherein _{Net weight}Without the weight of bell batch can own, k is the Young's modulus that is attached to the tank body upper spring for the string tank, and Δ x is the deformation quantity that is attached to the tank body upper spring, and Δ x value remains unchanged in the cloth process.

Fig. 2 is the method flow diagram of one embodiment of the invention, and it comprises the following steps:

1) when this batch can charging is complete, reads the material Baking soda of blast furnace lower-weighing measuring system and call value W in the following text _{Under groove}Owing between furnace top pressure and batch can internal pressure, having pressure difference, making heavily weighing value of the material distortion provided in real time by the batch can LOAD CELLS, without the bell furnace roof, can call value W in the following text for the string tank by the material Baking soda of blast furnace lower-weighing measuring system system _{Under groove}Mean the true material weight in batch can after the charging of this batch can.

2) batch can once all press and the secondary pressure equalizing in read in batches the n group and expect heavily weighing value W _i, furnace top pressure P _iWith batch can force value T _i, wherein i be batch can once all press and the secondary pressure equalizing in the i group of reading of data in batches;

3) according to the n group process data read in batches, set up the fuzzy inference rule of pressure difference compensation coefficient:

IF(△P–(P ₁-T ₁))is?F ₁and(△P–(P ₂-T ₂))is?F ₂,and…,and(△P–(P _n-T _n))is?F _n，

Wherein, △ P is the poor of furnace top pressure and batch can pressure; Batch can when K (△ P) is △ P for the difference of furnace top pressure and the batch can pressure differential pressure compensation coefficient of weighing; F _iFor (△ P – (P _i-T _i)) corresponding fuzzy subset, comprise two Linguistic Values of positive P and negative N, work as F _iDuring for positive P, corresponding Before get+number, work as F _iDuring for negative N, corresponding

Before get-number, therefore above-mentioned fuzzy inference rule has 2 ⁿBar;

4) in step 3), obtain 2 ⁿThe bar fuzzy inference rule, definition broad sense input variable x _i:

x _i=△P–(P _i-T _i)；

Then get broad sense input variable x _iThe corresponding positive P of fuzzy set and the fuzzy membership functions of negative N are respectively μ _P(x _i) and μ _N(x _i):

$\left\{\begin{array}{c}{\mathrm{\μ}}_P\left(x_i\right)=e^{-{\frac{1}{2}(x_i-k_i)}^2}\\ {\mathrm{\μ}}_N\left(x_i\right)=e^{-\frac{1}{2}{(x_i+k_i)}^2}\end{array}\right.;$

In formula, k _iFor being more than or equal to 0 constant;

5) utilize in step 3), obtain 2 ⁿThe broad sense input variable x defined in bar fuzzy inference rule and step 4) _iAnd fuzzy membership functions μ corresponding to fuzzy set _P(x _i) and μ _N(x _i), obtain following string tank without the weigh computation model of differential pressure compensation coefficient of the batch can of bell furnace roof:

Wherein e is exponential function;

6) in the batch can discharge process, the PLC controller cycle reads the signal value P that the heavy weight transmitter of furnace top pressure transmitter, batch can pressure unit and material sends in real time _{Furnace roof}, T _{Batch can}And W _Weighing, the difference △ P=P of calculating furnace top pressure and batch can pressure _{Furnace roof}-T _{Batch can}, according to the string tank obtained in step 5) without the batch can of bell furnace roof difference that the computation model of differential pressure compensation coefficient asks for furnace top pressure and the batch can pressure batch can while the being △ P differential pressure compensation COEFFICIENT K (△ P) of weighing of weighing;

7) in dynamic calculation batch can discharge process, the material method of double differences is pressed offset:

W _{Material is heavy}=W _Weighing+ K (Δ P) * Δ P-W _{Net weight}-k * Δ x;

Wherein, W _{Material is heavy}For the material method of double differences is pressed the weight of material value after compensating, W _{Net weight}Without the weight of bell batch can own, k is the Young's modulus that is attached to the tank body upper spring for the string tank, and Δ x is the deformation quantity that is attached to the tank body upper spring, and Δ x value remains unchanged in the cloth process;

By the W after differential pressure compensation _{Material is heavy}Send to furnace roof batch can cloth control system, for the weighting method cloth of blast furnace;

8) the batch can cloth is complete, waits for batch can charging next time.

Through above-mentioned steps, realized the string tank without the batch can of the bell furnace roof differential pressure fuzzy compensation of weighing.

Fig. 3 is that the hardware system of one embodiment of the invention forms structure iron, is comprised of LOAD CELLS and upper computer under PLC controller, stove constant-pressure transmitter, batch can pressure unit, batch can LOAD CELLS, groove.Described PLC controller receives the process data sended over from on-the-spot LOAD CELLS and pressure unit, according to the inventive method, carry out data analysis and in line computation, the batch can differential pressure compensation coefficient of weighing is provided accurately constantly, the differential pressure compensation coefficient storage of simultaneously real-time batch can being weighed, in the data memory storehouse of PLC controller, shows simultaneously in upper computer.The furnace top pressure transmitter, for measuring in real time the blast furnace top pressure value; The batch can pressure unit is for measuring in real time PW type string tank without bell furnace roof blanking tank internal pressure value; The batch can LOAD CELLS is for measuring in real time PW type string tank without bell furnace roof blanking tank gravimetric value; Under groove, LOAD CELLS is for measuring the weight of material value that under blast furnace, system is feeded to batch can each time.

Disclosed certain the blast furnace useful volume of the present embodiment is 2000m ³, the annual utilization coefficient is 2.5, and be 350 days a year working days, and year pig iron output is 1,750,000 tons, and material-uploading style is charge hoisting by belt conveyer, and blast furnace roof adopts PW type string tank without the bell furnace roof, and feeding, discharge pipe useful volume is 45m ³, batch can all presses employing half clear height producer gas once all to press and the nitrogen secondary is all pressed.By material feeding jar, blanking tank, upper sealing, lower seal, blanking lock, chute, the major equipment such as all press, diffuse and form, wherein blanking tank is equipped with batch can and claims, is used for that the weighing blanking tank is real weighs, to realize the weighting method cloth.Under groove, feeding system adopts the charge hoisting by belt conveyer mode, mainly by supplying burnt belt, forming for barrow band and material loading master belt, the belt of returning mine, vibratory screening apparatus and feed bin etc.The process control process of whole charging of blast furnace is: will expect signal when furnace roof sends, by ore drawing pointer and put-focus pointer, provide ore drawing and put-focus instruction, the ore storage bin of choosing or coke bin start by the order of setting blowing successively, when first selected feed bin starts blowing, program is sent the stub bar signal, when last selected feed bin emptying material, program is sent material tail signal.When stub bar and material tail are supplying the barrow band or are supplying on burnt belt to obtain time delay to cover, send stub bar and the signal of material tail at material feeding jar, now sending material feeding jar has the material signal.When blanking tank discharges a batch of material, send material during spacing wave, open pressure equalizing blow off valve to the batch can release, open subsequently upper sealing valve and material loading valve, by the blanking tank of packing into of the furnace charge in material feeding jar.Feed complete, close material loading valve, upper sealing valve and pressure equalizing blow off valve, and all press to blanking tank.Stock rod is visited material and is down to the regulation stockline degree of depth, after lifting puts in place, opens lower sealing valve and blanking lock, controls the material Flow Velocity by the aperture size of blanking lock, and furnace charge is by every cloth one batch of material of distributor chute, and the start angle stepping 60 of the front batch of material of its initial angle is spent.The infinite loop of whole process namely completes dress, the cloth action of blast furnace.Specifically implement below in computation process, described batch can all refers to the blanking tank in the present embodiment.

Above-described embodiment is in differential pressure fuzzy compensation process is weighed in realization without the batch can of bell furnace roof to the string tank, its carry out once with the secondary pressure equalizing in 30 groups of process datas gathering distribute as shown in Figure 4, can see that interpolation between discharge tank actual weight and furnace roof weighing system weighing value and the nonlinear physics relation between differential pressure value can very clearly show.Different sections at pressure difference, the differential pressure compensation coefficient is different, system of the present invention can realize the string tank without the weigh effective compensation of differential pressure of the batch can of bell furnace roof, the technical problem of drift occurs in the differential pressure compensation coefficient that solution blast furnace external factors cause, reduced the impact that blast furnace top pressure is weighed on batch can, realize the accurate weight measurement under the batch can high pressure, guaranteed the accurate control of weighting method cloth process, make the blast furnace bell-less cloth system to stablize, evenly, accurately control the cloth flow, significantly improve the smelting level of blast furnace ironmaking.

Above embodiment is only be used to calculating thought of the present invention and characteristics are described, its purpose is to make those skilled in the art can understand content of the present invention and implement according to this, and protection scope of the present invention is not limited to above-described embodiment.So the disclosed principle of all foundations, equivalent variations or the modification that mentality of designing is done, all within protection scope of the present invention.

Claims (4)

1. go here and there tank without the batch can of the bell furnace roof differential pressure fuzzy compensation system of weighing for one kind, it is characterized in that: it comprises:

Groove is called the value acquisition module in the following text, for after the batch can charging is complete, reads the material Baking soda of blast furnace lower-weighing measuring system and calls value W in the following text _{Under groove}

The pressure equalizing data acquisition module, for once all pressing at batch can and the secondary pressure equalizing reads in batches the n group and expects heavily weighing value W _i, furnace top pressure P _iWith batch can force value T _i, wherein i be batch can once all press and the secondary pressure equalizing in the i group of reading of data in batches;

The batch can differential pressure fuzzy compensation MBM of weighing, call the value acquisition module in the following text with described groove and be connected with the pressure equalizing data acquisition module, calls value W in the following text be used to receiving the material Baking soda _{Under groove}, expect heavily weighing value W _i, furnace top pressure P _iWith batch can force value T _i, and set up the fuzzy inference rule of pressure difference compensation coefficient and define its broad sense input variable and fuzzy membership functions corresponding to fuzzy set, obtain going here and there tank without the weigh computation model parameter of differential pressure compensation coefficient of the batch can of bell furnace roof;

The discharge process data acquisition module, the signal value sent in real time for periodically reading the heavy weight transmitter of batch can discharge process furnace top pressure transmitter, batch can pressure unit and material: furnace roof real-time pressure P _{Furnace roof}, batch can real-time pressure T _{Batch can}With the real-time weighing value of material W _Weighing

Real-time differential pressure compensation coefficients calculation block, with the described batch can differential pressure fuzzy compensation MBM of weighing, be connected with the discharge process data acquisition module, for receiving the string tank without the weigh computation model parameter of differential pressure compensation coefficient of the batch can of bell furnace roof, receive simultaneously furnace roof real-time pressure P _{Furnace roof}, batch can real-time pressure T _{Batch can}, the difference △ P=P of calculating furnace top pressure and batch can pressure _{Furnace roof}-T _{Batch can}With real-time differential pressure compensation COEFFICIENT K (△ P);

Discharge process material molality is stuck with paste compensating module, is connected with the discharge process data acquisition module with described real-time differential pressure compensation coefficients calculation block, be used to receiving real-time differential pressure compensation COEFFICIENT K (△ P), receives simultaneously furnace roof real-time pressure P _{Furnace roof}, batch can real-time pressure T _{Batch can}With the real-time weighing value of material W _Weighing, press the weight of material value W after the compensation calculation formula calculates compensation according to the discharge process material method of double differences _{Material is heavy}, and by W _{Material is heavy}Send to the weighting method cloth of furnace roof batch can cloth control system for blast furnace.

2. string tank according to claim 1, without the batch can of the bell furnace roof differential pressure fuzzy compensation system of weighing, is characterized in that: the fuzzy inference rule that described batch can is weighed in differential pressure fuzzy compensation MBM is:

IF(△P–(P ₁-T ₁))is?F ₁and(△P–(P ₂-T ₂))is?F ₂,and…,and(△P–(P _n-T _n))is?F _n，

Wherein, △ P is the poor of furnace top pressure and batch can pressure; F _iFor (△ P – (P _i-T _i)) corresponding fuzzy subset, comprise two Linguistic Values of positive P and negative N, work as F _iDuring for positive P, corresponding

Before get+number, work as F _iDuring for negative N, corresponding

Before get-number, therefore above-mentioned fuzzy inference rule has 2 ⁿBar;

Broad sense input variable x in ambiguity in definition inference rule _i:

x _i=△P–(P _i-T _i)；

Then get broad sense input variable x _iThe corresponding positive P of fuzzy set and the fuzzy membership functions of negative N are respectively μ _P(x _i) and μ _N(x _i):

$\left\{\begin{array}{c}{\mathrm{\μ}}_P\left(x_i\right)=e^{-{\frac{1}{2}(x_i-k_i)}^2}\\ {\mathrm{\μ}}_N\left(x_i\right)=e^{-\frac{1}{2}{(x_i+k_i)}^2}\end{array}\right.;$

In formula, k _iFor being more than or equal to 0 constant.

3. string tank according to claim 2, without the batch can of the bell furnace roof differential pressure fuzzy compensation system of weighing, is characterized in that: in described real-time differential pressure compensation coefficients calculation block in real time the calculation formula of differential pressure compensation COEFFICIENT K (△ P) be:

Wherein e is exponential function.

4. string tank according to claim 3, without the batch can of the bell furnace roof differential pressure fuzzy compensation system of weighing, is characterized in that: described discharge process material molality is stuck with paste the discharge process material method of double differences in compensating module and is pressed the compensation calculation formula to be:

W _{Material is heavy}=W _Weighing+ K (Δ P) * (P _{Furnace roof}-T _{Batch can})-W _{Net weight}-k * Δ x,

W wherein _{Net weight}Without the weight of bell batch can own, k is the Young's modulus that is attached to the tank body upper spring for the string tank, and Δ x is the deformation quantity that is attached to the tank body upper spring, and Δ x value remains unchanged in the cloth process.

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