CN103409571B - 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

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 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 bell furnace roof and carries out cloth, have 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, substantially all adopts string tank without the charging technique of 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, making to weigh to detect without bell furnace roof becomes 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.Furnace top pressure can be in the high pressure conditions of 1.5～2.5 kilograms when normal production for blast furnace, batch can is subject to the buoyancy making progress under the effect of furnace top pressure, and furnace top pressure fluctuation also can cause buoyancy fluctuation, therefore must adopt differential pressure compensation system to compensate the impact of furnace top pressure on the batch can value of weighing.

Conventional weighing differential pressure compensation technical scheme is linear compensation method at present, and this method can not be revised in real time to 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 weighs of < < furnace roof batch can, describe a kind of equalising means with cycle memory and proofreaied and correct the method that weighs differential pressure compensation coefficient, although the method can effectively solve the technical problem of the linear compensation coefficient drift that blast furnace external factors cause, but production practice show, the method is excessive for the susceptibility of " bad point " take off data, when cause furnace top pressure or batch can weighing value seriously not to tend on time cause the fluctuation of self-correction linear compensation coefficient due to bad working environments, and the removal mechanisms at work that there is no " bad point " data, make these data may affect self-correction result below always, the hidden danger that exists 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 causing 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 blast furnace external factors cause.

The present invention solves the problems of the technologies described above taked technical scheme to be: 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, is characterized in that: it comprises:

Groove is called value acquisition module in the following text, for after 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};

Pressure equalizing data acquisition module, for once all pressing at batch can and secondary pressure equalizing reads in batches 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 secondary pressure equalizing in the i group of reading of data in batches;

The batch can differential pressure fuzzy compensation MBM of weighing, calls value acquisition module in the following text with described groove and is connected with pressure equalizing data acquisition module, for receiving material Baking soda, calls value W in the following text _{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;

Discharge process data acquisition module, the signal value sending 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 material weighing value in real time W _weigh;

Real-time differential pressure compensation coefficients calculation block, be connected with discharge process data acquisition module with the described batch can differential pressure fuzzy compensation MBM of weighing, for receiving string tank without the weigh computation model parameter of differential pressure compensation coefficient of the batch can of bell furnace roof, receive furnace roof real-time pressure P simultaneously _{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 discharge process data acquisition module with described real-time differential pressure compensation coefficients calculation block, for receiving real-time differential pressure compensation COEFFICIENT K (△ P), receives furnace roof real-time pressure P simultaneously _{furnace roof}, batch can real-time pressure T _{batch can}with material weighing value in real time W _weigh, according to the heavy differential pressure compensation calculation formula of discharge process material, calculate the weight of material value W after compensation _{material is heavy}, and by W _{material is heavy}send to furnace roof batch can cloth control system for the weighting method cloth of 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):

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

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 differential pressure compensation COEFFICIENT K (△ P) is in real time:

Wherein e is exponential function.

Press such scheme, described discharge process material molality is stuck with paste the heavy differential pressure compensation calculation formula of discharge process material in compensating module and is:

W _{material is heavy}=W _weigh+ K (Δ P) * (P _{furnace roof}-T _{batch can})-W _{net weight}-k * Δ x,

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

Beneficial effect of the present invention is:

1, take full advantage of that batch can is once all pressed and 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 On-line Fuzzy modeling, obtain the nonlinear physics relation that furnace top pressure and the difference of batch can pressure are weighed between pressure difference compensation coefficient with batch can, can effectively solve the pressure difference compensation coefficient that blast furnace external factors cause the technical problem of drifting about occurs;

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

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 secondary pressure equalizing in 30 groups of process data distribution plans gathering.

Embodiment

Below in conjunction with specific examples and accompanying drawing, the present invention will be further described.

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

Groove is called value acquisition module in the following text, for after 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};

Pressure equalizing data acquisition module, for once all pressing at batch can and secondary pressure equalizing reads in batches 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 secondary pressure equalizing in the i group of reading of data in batches;

The batch can differential pressure fuzzy compensation MBM of weighing, calls value acquisition module in the following text with described groove and is connected with pressure equalizing data acquisition module, for receiving material Baking soda, calls value W in the following text _{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;

Discharge process data acquisition module, the signal value sending 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 material weighing value in real time W _weigh;

Real-time differential pressure compensation coefficients calculation block, be connected with discharge process data acquisition module with the described batch can differential pressure fuzzy compensation MBM of weighing, for receiving string tank without the weigh computation model parameter of differential pressure compensation coefficient of the batch can of bell furnace roof, receive furnace roof real-time pressure P simultaneously _{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: be connected with discharge process data acquisition module with described real-time differential pressure compensation coefficients calculation block, for receiving real-time differential pressure compensation COEFFICIENT K (△ P), receive furnace roof real-time pressure P simultaneously _{furnace roof}, batch can real-time pressure T _{batch can}with material weighing value in real time W _weigh, according to the heavy differential pressure compensation calculation formula of discharge process material, calculate the weight of material value W after compensation _{material is heavy}, and by W _{material is heavy}send to furnace roof batch can cloth control system for the weighting method cloth of 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):

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

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 differential pressure compensation COEFFICIENT K (△ P) is in real time:

Wherein e is exponential function.

Described discharge process material molality is stuck with paste the heavy differential pressure compensation calculation formula of discharge process material in compensating module:

W _{material is heavy}=W _weigh+ K (Δ P) * (P _{furnace roof}-T _{batch can})-W _{net weight}-k * Δ x

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

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

1) when this batch can, feed when complete, read the material Baking soda of blast furnace lower-weighing measuring system and call value W in the following text _{under groove}; Owing to there is pressure difference between furnace top pressure and batch can internal pressure, make the material being provided in real time by batch can LOAD CELLS heavily claim magnitude distortion, for string tank, without bell furnace roof, can call value W in the following text by the material Baking soda of blast furnace lower-weighing measuring system system _{under groove}represent the true material weight in batch can after the charging of this batch can.

2) batch can once all press and secondary pressure equalizing in read in batches 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 secondary pressure equalizing in the i group of reading of data in batches;

3) according to the n group process data reading 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; The batch can when difference that K (△ P) is furnace top pressure and batch can pressure the is △ P 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 ⁿbar 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):

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

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 defining 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 going here and there as follows 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 batch can discharge process, 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 _weigh, the difference △ P=P of calculating furnace top pressure and batch can pressure _{furnace roof}-T _{batch can}, according to the string tank obtaining 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, expect method of double differences pressure offset:

W _{material is heavy}=W _weigh+ K (Δ P) * Δ P-W _{net weight}-k * Δ x;

Wherein, W _{material is heavy}for expecting the weight of material value after heavy differential pressure compensation, W _{net weight}for string tank is without the weight of bell batch can own, k is the Young's modulus that is attached to tank body upper spring, and Δ x is the deformation quantity that is attached to tank body upper spring, and in cloth process, Δ x value remains unchanged;

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

Through above-mentioned steps, realized 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, LOAD CELLS and upper computer under PLC controller, stove constant-pressure transmitter, batch can pressure unit, batch can LOAD CELLS, groove, consists of.Described PLC controller receives the process data sending 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.Furnace top pressure transmitter, for measuring in real time blast furnace top pressure value; Batch can pressure unit is for measuring in real time PW type string tank without bell furnace roof blanking tank internal pressure value; 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, 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 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 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 weighing that blanking tank is real weighs, to realize weighting method cloth.Under groove, feeding system adopts charge hoisting by belt conveyer mode, mainly by supplying burnt belt, forming for barrow band and the main belt of material loading, the belt of returning mine, vibratory screening apparatus and feed bin etc.The process control process of whole charging of blast furnace is: when furnace roof sends, will expect signal, 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 successively blowing, when first selected feed bin starts blowing, program is sent stub bar signal, when last selected feed bin emptying material, program is sent material tail signal.When stub bar and material tail for barrow band or on burnt belt time delay while covering, send stub bar and material tail at the signal of material feeding jar, now sending material feeding jar has material signal.When blanking tank discharges a batch of material, send material during spacing wave, open pressure equalizing blow off valve to batch can release, open subsequently upper sealing valve and material loading valve, pack the furnace charge in material feeding jar into blanking tank.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, by the aperture size of blanking lock, controls material Flow Velocity, 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 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 weighed in differential pressure fuzzy compensation process in realization to string tank without the batch can of bell furnace roof, its carry out once with 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, differential pressure compensation coefficient is different, system of the present invention can realize string tank without the weigh effective compensation of differential pressure of the batch can of bell furnace roof, there is the technical problem of drift 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, the accurate weight realizing under batch can high pressure is measured, guaranteed the accurate control of weighting method cloth process, blast furnace bell-less cloth system can be stablized, evenly, accurately control cloth flow, significantly improve the smelting level of blast furnace ironmaking.

Above embodiment is only for calculating thought of the present invention and feature are described, its object 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 (3)

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

Groove is called value acquisition module in the following text, for after 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};

Pressure equalizing data acquisition module, for once all pressing at batch can and secondary pressure equalizing reads in batches 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 secondary pressure equalizing in the i group of reading of data in batches;

The batch can differential pressure fuzzy compensation MBM of weighing, calls value acquisition module in the following text with described groove and is connected with pressure equalizing data acquisition module, for receiving material Baking soda, calls value W in the following text _{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 differential pressure 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;

Discharge process data acquisition module, the signal value sending 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 material weighing value in real time W _weigh;

Real-time differential pressure compensation coefficients calculation block, be connected with discharge process data acquisition module with the described batch can differential pressure fuzzy compensation MBM of weighing, for receiving string tank without the weigh computation model parameter of differential pressure compensation coefficient of the batch can of bell furnace roof, receive furnace roof real-time pressure P simultaneously _{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 discharge process data acquisition module with described real-time differential pressure compensation coefficients calculation block, for receiving real-time differential pressure compensation COEFFICIENT K (△ P), receives furnace roof real-time pressure P simultaneously _{furnace roof}, batch can real-time pressure T _{batch can}with material weighing value in real time W _weigh, according to the heavy differential pressure compensation calculation formula of discharge process material, calculate the weight of material value W after compensation _{material is heavy}, and by W _{material is heavy}send to furnace roof batch can cloth control system for the weighting method cloth of 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):

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

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

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

Wherein e is exponential function.

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: described discharge process material molality is stuck with paste the heavy differential pressure compensation calculation formula of discharge process material in compensating module and is:

W _{material is heavy}=W _weigh+ K (Δ P) * (P _{furnace roof}-T _{batch can})-W _{net weight}-k * Δ x,

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