CN106815405A - A kind of In Raceway Before Tuyere of Blast Furnace depth computing method and system - Google Patents

Abstract

The present invention discloses a kind of In Raceway Before Tuyere of Blast Furnace depth computing method and system, and the method includes：The result of calculation of the raceway zone depth that acquisition is obtained using Euler's model；According to the result of calculation, the Changing Pattern of the raceway zone depth is obtained；According to the Changing Pattern, the parameter related to the raceway zone depth is obtained, the parameter includes coke size, coal gas volume flow rate, the air port gross area, raceway zone gas temperature and hot-blast pressure before bosh coal gas density, Coke density, air port；According to the parameter, the computation model of the raceway zone depth is built.The method and system that the application is provided can solve the technical problem that realization is complicated, efficiency is low of In Raceway Before Tuyere of Blast Furnace depth computing method in the prior art.And can realize reducing the complexity of raceway zone depth calculation, the technique effect of the efficiency of raising raceway zone depth calculation.

Description

A kind of In Raceway Before Tuyere of Blast Furnace depth computing method and system

Technical field

The present invention relates to field of computer technology, more particularly to a kind of In Raceway Before Tuyere of Blast Furnace depth computing method and it is System.

Background technology

Blast furnace is a countercurrent reactor for complexity, and the hot blast of the HTHP blown into from bottom house is returned in air port There is combustion reaction in rotation area, produce Gas Flow with coke.Gas Flow in uphill process, and upper blast furnace add ore between Energy exchange is carried out, reduction reaction occurs, generate molten iron and slag.Tuyere Raceway is indispensable heavy blast furnace stable operation Reaction zone is wanted, the depth and response situation of In Raceway Before Tuyere of Blast Furnace directly affect blast furnace gas distribution, furnace charge and decline and whole The heat and mass transfer process of individual blast furnace.

In the prior art, the mechanism model of Tuyere Raceway is usually set up using Euler's model, then using mechanism mould Type, calculates the Tuyere Raceway depth under different condition.

However, using in the existing method that raceway zone depth is calculated using mechanism model, parameter that model needs and Condition is more, such as the near-wall region of furnace wall uses wall condition using Standard law of wall, coal powder injection parameter, dead stock column surface Deng so that calculate complicated, and the calculating time of the method is more long, causes inefficiency.

It can be seen that, there is the skill for realizing that complicated, efficiency is low in the computational methods of In Raceway Before Tuyere of Blast Furnace depth of the prior art Art problem.

The content of the invention

The present invention provides a kind of computational methods and system of In Raceway Before Tuyere of Blast Furnace depth, is used to solve high in the prior art The technical problem that realization is complicated, efficiency is low of stove Tuyere Raceway depth computing method.

In a first aspect, a kind of In Raceway Before Tuyere of Blast Furnace depth computing method is the embodiment of the invention provides, including：Acquisition utilizes Europe The result of calculation of the raceway zone depth that draw model is obtained；According to the result of calculation, the Changing Pattern of the raceway zone depth is obtained； According to the Changing Pattern, obtain the parameter related to the raceway zone depth, the parameter including bosh coal gas density, Coke density, Coke size, coal gas volume flow rate, the air port gross area, raceway zone gas temperature and hot-blast pressure before air port；According to the parameter, structure The computation model of the raceway zone depth is built, the computation model is： Wherein, D_RIt is raceway zone depth, ρ_oIt is bosh coal gas density, ρ_sIt is Coke density, D_PIt is coke size before air port, V_gIt is coal gas body Product flow rate, S_TIt is the air port gross area, T_rRaceway zone gas temperature, P_bHot-blast pressure.

Optionally, the result of calculation for obtaining the raceway zone depth obtained using Euler's model, including：According to Euler's mould Type, builds the mechanism model of the raceway zone depth, and the mechanism model is specially：

Wherein, k is tubulence energy, and ε is tubulence energy dissipative shock wave, G_kTable Show the Turbulent Kinetic produced by laminar velocity gradient, G_bIt is the Turbulent Kinetic that buoyancy is produced, Y_MIt is the mistake in compressible turbulent flow The fluctuation that the diffusion crossed is produced, σ_kAnd σ_εIt is the turbulent flow Prandtl numbers of k equations and ε equations, C in formula_1ε=1.44, C_2ε=1.92, C_3ε=0.09, C_μ=0.09, σ_k=1.0, σ_ε=1.3, S_kAnd S_εIt is constant；Determine the boundary condition of the mechanism model, it is described Boundary condition includes that the near-wall region of furnace wall goes out using speed entrance boundary, model top is set at Standard law of wall, air port The symmetrical two sides usage cycles loop boundary of pressure export condition, model is set at mouthful and dead stock column surface uses wall bar Part；According to the mechanism model and the boundary condition, the result of calculation of raceway zone depth is obtained.

Optionally, according to the parameter, the computation model of the raceway zone depth is built, including：Obtain receiving for raceway zone Power situation；Obtain the parameter；According to the stressing conditions and the parameter, the penetrating coefficient of the raceway zone is calculated, it is described Penetrating coefficient isAccording to the penetrating coefficient, fitting obtains the calculating mould of the raceway zone depth Type.

Optionally, the raceway zone gas temperature is a fixed value.

Optionally, the bosh coal gas density is the percentage shared by the molecular weight of each component in coal gas.

Second aspect, the embodiment of the invention provides a kind of In Raceway Before Tuyere of Blast Furnace depth calculation system, including：First obtains Modulus block, the result of calculation for obtaining the raceway zone depth obtained using Euler's model；Module is obtained, by according to based on described Result is calculated, the Changing Pattern of the raceway zone depth is obtained；Second acquisition module, for according to the Changing Pattern, obtain with The related parameter of the raceway zone depth, the parameter includes coke size, coal before bosh coal gas density, Coke density, air port Air volume flow rate, the air port gross area, raceway zone gas temperature and hot-blast pressure；Module is built, for according to the parameter, building The computation model of the raceway zone depth, the computation model is： Wherein, in formula (1), D_RIt is raceway zone depth, unit is m, ρ_oIt is bosh coal gas density, unit is kg/m³, ρ_sIt is Coke density, Unit is kg/m³, D_PIt is coke size before air port, unit is m, V_gIt is coal gas volume flow rate, unit is m³/ s, S_TIt is the total face in air port Product, unit is m², T_rRaceway zone gas temperature, unit for DEG C, P_bHot-blast pressure, unit is MPa.

Optionally, first acquisition module includes：Construction unit, for according to Euler's model, building the raceway zone The mechanism model of depth, the mechanism model is specially：

Wherein, k is tubulence energy, and ε is tubulence energy dissipative shock wave, G_kTable Show the Turbulent Kinetic produced by laminar velocity gradient, G_bIt is the Turbulent Kinetic that buoyancy is produced, Y_MIt is the mistake in compressible turbulent flow The fluctuation that the diffusion crossed is produced, σ_kAnd σ_εIt is the turbulent flow Prandtl numbers of k equations and ε equations, C in formula_1ε=1.44, C_2ε=1.92, C_3ε=0.09, C_μ=0.09, σ_k=1.0, σ_ε=1.3, S_kAnd S_εIt is constant；Determining unit, for determining the mechanism model Boundary condition, the boundary condition includes that the near-wall region of furnace wall uses setting speed entrance side at Standard law of wall, air port The symmetrical two sides usage cycles loop boundary of pressure export condition, model and dead stock column table are set at boundary, model upper outlet Face uses wall condition；First processing units, for according to the mechanism model and the boundary condition, drawing raceway zone depth Result of calculation.

Optionally, the structure module includes：First acquisition unit, the stressing conditions for obtaining raceway zone；Obtain single Unit, for obtaining the parameter；Second processing unit, for according to the stressing conditions and the parameter, calculating the convolution The penetrating coefficient in area, the penetrating coefficient is3rd processing unit, be for being penetrated according to Number, fitting obtains the computation model of the raceway zone depth.

Optionally, the raceway zone gas temperature is a fixed value.

Optionally, the bosh coal gas density is the percentage shared by the molecular weight of each component in coal gas.

One or more technical schemes provided in the embodiment of the present invention, at least have the following technical effect that or advantage：

1st, the method that the embodiment of the present application is provided, the convolution result obtained using Euler's model obtains the raceway zone depth Changing Pattern, and according to the Changing Pattern, obtain the parameter related to the raceway zone depth, further according to the parameter, The computation model of the raceway zone depth is built, so as to calculate raceway zone depth, can be calculated using less parameter Raceway zone depth, solves the problems, such as that the realization of existing utilization Euler Model Calculating Method is complicated low with efficiency, greatly simplifies The complexity of raceway zone depth calculation, and reduce the calculating time, improve computational efficiency.

2nd, the system that the embodiment of the present application is provided, builds what module was obtained using the second acquisition module according to Changing Pattern Parameter, builds the computation model of the raceway zone depth, so as to calculate raceway zone depth, can be calculated using less parameter Raceway zone depth is obtained, solves the problems, such as that the realization of existing utilization Euler Model Calculating Method is complicated low with efficiency, significantly The complexity of raceway zone depth calculation is simplified, and reduces the calculating time, improve computational efficiency.

Described above is only the general introduction of technical solution of the present invention, in order to better understand technological means of the invention, And can be practiced according to the content of specification, and in order to allow the above and other objects of the present invention, feature and advantage can Become apparent, below especially exemplified by specific embodiment of the invention.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are this hairs Some bright embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root Other accompanying drawings are obtained according to these accompanying drawings.

Fig. 1 is the flow chart of depth computing method in the embodiment of the present invention；

Fig. 2 is the logical construction schematic diagram of depth calculation system in the embodiment of the present invention.

Specific embodiment

The present invention provides a kind of computational methods and system of In Raceway Before Tuyere of Blast Furnace depth, solves blast furnace in the prior art The technical problem that realization is complicated, efficiency is low of Tuyere Raceway depth computing method.Reduce the complexity of raceway zone depth calculation Property simultaneously improves the efficiency of raceway zone depth calculation.

Technical scheme in the embodiment of the present application, general thought is as follows：

A kind of In Raceway Before Tuyere of Blast Furnace depth computing method, including：The raceway zone depth that acquisition is obtained using Euler's model Result of calculation；According to the result of calculation, the Changing Pattern of the raceway zone depth is obtained；According to the Changing Pattern, obtain The parameter related to the raceway zone depth is taken, the parameter includes coke grain before bosh coal gas density, Coke density, air port Degree, coal gas volume flow rate, the air port gross area, raceway zone gas temperature and hot-blast pressure；According to the parameter, the convolution is built The computation model of area's depth, the computation model is：Wherein, D_R It is raceway zone depth, ρ_oIt is bosh coal gas density, ρ_sIt is Coke density, D_PIt is coke size before air port, V_gIt is coal gas volume flow Rate, S_TIt is the air port gross area, T_rRaceway zone gas temperature, P_bHot-blast pressure.

The result of calculation of the raceway zone depth that the above method is obtained by using Euler's model finds out the raceway zone depth Changing Pattern, and according to the Changing Pattern, obtain the parameter related to the raceway zone depth, and build back with above-mentioned parameter The computation model of area's depth is revolved, so as to calculate raceway zone depth, raceway zone depth can be calculated using less parameter, Solve the problems, such as that the realization of existing utilization Euler Model Calculating Method is complicated low with efficiency, enormously simplify raceway zone depth The complexity of calculating, and the calculating time is reduced, improve computational efficiency.

To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.

Embodiment one

The present embodiment provides a kind of In Raceway Before Tuyere of Blast Furnace depth computing method, refer to Fig. 1, and methods described includes：

Step S101, the result of calculation of the raceway zone depth that acquisition is obtained using Euler's model；

Step S102, according to the result of calculation, obtains the Changing Pattern of the raceway zone depth；

Step S103, according to the Changing Pattern, obtains the parameter related to the raceway zone depth, and the parameter includes Coke size before bosh coal gas density, Coke density, air port, coal gas volume flow rate, the air port gross area, raceway zone gas temperature and Hot-blast pressure；

Step S104, according to the parameter, builds the computation model of the raceway zone depth, and the computation model is：Wherein, D_RIt is raceway zone depth, ρ_oIt is bosh coal gas density, ρ_sFor Coke density, D_PIt is coke size before air port, V_gIt is coal gas volume flow rate, S_TIt is the air port gross area, T_rRaceway zone gas temperature, P_b Hot-blast pressure.

Below, the raceway zone depth computing method that the application is provided is described in detail with reference to Fig. 1：

First, step S101, the result of calculation of the raceway zone depth that acquisition is obtained using Euler's model are performed.

In the embodiment of the present application, Euler's model is most complicated multiphase flow model in Fluent, and it establishes a set of bag The equation of momentum and continuity equation containing n solve each phase, it is possible to use Euler's model solves raceway zone depth, specifically Then ground, can be calculated, but raceway zone depth is calculated using Euler's model by building Euler's model by computer In method, due to containing substantial amounts of parameter and equation in the model, considerably complicated, general solution procedure needs more than 20 are solved Hour is longer, therefore computational efficiency is very low, it is impossible to suitable for actual production, therefore, the application is based on this, in Euler's mould On the basis of type is solved, a progress optimization is carried out.

Subsequently, step S102 is performed, according to the result of calculation, the Changing Pattern of the raceway zone depth is obtained.

In specific implementation process, can in a computer according to the result of calculation for drawing, the above-mentioned calculating knot of manual analysis Really, it is possible to be analyzed using related software, such as MATLAB, so as to obtain the Changing Pattern of raceway zone depth.

Next, performing step S103, according to the Changing Pattern, the parameter related to the raceway zone depth is obtained, The parameter includes coke size, coal gas volume flow rate, the air port gross area, convolution before bosh coal gas density, Coke density, air port Area's gas temperature and hot-blast pressure.

In specific implementation process, according to the Changing Pattern of raceway zone depth, find out related to raceway zone depth main Parameter.

Finally, step S104 is performed, according to the parameter, the computation model of the raceway zone depth, the calculating is built Model is：Wherein, D_RIt is raceway zone depth, ρ_oIt is bosh coal gas Density, ρ_sIt is Coke density, D_PIt is coke size before air port, V_gIt is coal gas volume flow rate, S_TIt is the air port gross area, T_rRaceway zone coal Temperature degree, P_bHot-blast pressure.

In specific implementation process, it is possible to use MATLAB is fitted in a computer, so that it is determined that each term coefficient.And The result of the computation model that will be drawn is compared with theoretical value, draws Tuyere Raceway pattern.

From above-mentioned technical proposal, it can be seen that the method provided in the present embodiment is by using returning that Euler's model is obtained The result of calculation for revolving area's depth finds out the Changing Pattern of the raceway zone depth, and according to the Changing Pattern, obtains and described time The related parameter of rotation area's depth, and the computation model of raceway zone depth is built with above-mentioned parameter, so as to calculate raceway zone depth, Raceway zone depth can be calculated using less parameter, the realization for solving existing utilization Euler Model Calculating Method is answered The miscellaneous and low problem of efficiency, enormously simplify the complexity of raceway zone depth calculation, and reduce the calculating time, improve calculating Efficiency.

Optionally, the result of calculation for obtaining the raceway zone depth obtained using Euler's model, including：

According to Euler's model, the mechanism model of the raceway zone depth is built, the mechanism model is specially：

Wherein, k is tubulence energy, and ε is tubulence energy dissipative shock wave, G_kThe Turbulent Kinetic that expression is produced by laminar velocity gradient, G_b It is the Turbulent Kinetic that buoyancy is produced, Y_MIt is the fluctuation of the diffusion generation of transition, σ in compressible turbulent flow_kAnd σ_εIt is k equations and ε The turbulent flow Prandtl numbers of equation, C in formula_1ε=1.44, C_2ε=1.92, C_3ε=0.09, C_μ=0.09, σ_k=1.0, σ_ε=1.3, S_kAnd S_εIt is constant, user can be set according to actual conditions；

Determine the boundary condition of the mechanism model, the boundary condition includes that the near-wall region of furnace wall uses standard law of wall Speed entrance boundary is set at function, air port, is set the symmetrical two sides of pressure export condition, model at model upper outlet and is made Wall condition is used with loop cycle border and dead stock column surface；

According to the mechanism model and the boundary condition, the result of calculation of raceway zone depth is obtained.

Specifically, it is assumed that the flowing in Tuyere Raceway is the isothermal flow process in the absence of burning.So calculating process In only continuity equation and momentum conservation equation without considering further that energy conservation equation.

Mass-conservation equation equation form is：

Gas phase：

Solid phase：

The equation is the general expression of the conservation of mass, and it is applied to compressible and incompressible fluid.Wherein, ρ is density, t It it is the time, υ is velocity, and Sm is incorporated into the quality of continuous phase.Can also be other customized source items.The conservation of momentum its Essence is Newton's second law.The law can be expressed as：The momentum of fluid is equal to the external world to the rate of change of time in micro unit Act on the various power sums on the micro unit.According to this law, it can be deduced that the conservation of momentum side in inertial coodinate system Journey.

Gas phase：

Solid phase：

P is the pressure (static pressure) on fluid micro unit, gravity body force of the g roles of delegate on micro unit in formula.And by This obtains standard k-ε turbulence model, it is necessary to illustrate, most simple complete turbulence model has two fundamental equations, there is two Individual variable (speed and length dimension) needs to solve.Standard k-ε model is that k equations are accurate based on Turbulent Kinetic and diffusivity Equation, ε equations by empirical equation derive and come.When above-mentioned standard k- ε models are solved, gas phase is mutually all seen with particle Into the homogeneous continuous media of plan collectively resided in computational fields, respectively distinguished using volume fraction.The quality and momentum of each phase Conservation equation is solved under Euler's framework.Spatial spreading form uses single order upstreame scheme, and discrete equation group uses pressure x velocity SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) method of coupling is solved, turbulent flow Flowing is calculated using k- ε two-equation models.

Optionally, according to the parameter, the computation model of the raceway zone depth is built, including：

Obtain the stressing conditions of raceway zone；

Obtain the parameter；

According to the stressing conditions and the parameter, the penetrating coefficient of the raceway zone is calculated, the penetrating coefficient is

According to the penetrating coefficient, fitting obtains the computation model of the raceway zone depth.

Specifically, it is assumed that hot blast impulse force and coke are a little only subject on raceway zone border to the resistance of hot-air flow, to it Stress is analyzed, and using theoretical temperature combustion instead of coke particle diameter before wind pushing temperature, raceway zone border as effective diameter, convolution Area's stressing conditions mainly include the counter-force of hot blast penetration power, coke gravity and raceway zone wall (i.e. dead stock column coke layer), Ran Hougen According to the stressing conditions and the relevant parameter of foregoing acquisition, the penetrating coefficient of the raceway zone is calculated Finally, by being fitted determination coefficient, the computation model of final raceway zone depth is obtained.

On the relevant parameter in computation model, the bosh coal gas density is shared by the molecular weight of each component in coal gas Percentage, the raceway zone gas temperature is a fixed value.ρ_sIt is Coke density, is a constant；V_gIt is coal gas volume flow rate, root Measured according to blast-furnace hot-air, corresponding adjustment can be done with blowing system change；S_TIt is the air port gross area, according to blowing system It is determined that；Each parameter is brought into be calculated in computation model and can obtain Tuyere Raceway depth,

Based on same inventive concept, the embodiment of the present invention additionally provides the corresponding system of method in embodiment one, sees implementation Example two.

Embodiment two

A kind of In Raceway Before Tuyere of Blast Furnace depth calculation system is present embodiments provided, Fig. 2 is refer to, the system includes：

First acquisition module 201, the result of calculation for obtaining the raceway zone depth obtained using Euler's model；

Module 202 is obtained, for according to the result of calculation, obtaining the Changing Pattern of the raceway zone depth；

Second acquisition module 203, for according to the Changing Pattern, obtaining the parameter related to the raceway zone depth, The parameter includes coke size, coal gas volume flow rate, the air port gross area, convolution before bosh coal gas density, Coke density, air port Area's gas temperature and hot-blast pressure；

Module 204 is built, for according to the parameter, building the computation model of the raceway zone depth, the calculating mould Type is：

Wherein, in formula (1), D_RIt is raceway zone depth, unit is m, ρ_oIt is bosh coal gas density, unit is kg/m³, ρ_sFor Coke density, unit is kg/m³, D_PIt is coke size before air port, unit is m, V_gIt is coal gas volume flow rate, unit is m³/ s, S_T It is the air port gross area, unit is m², T_rRaceway zone gas temperature, unit for DEG C, P_bHot-blast pressure, unit is MPa.

In a kind of In Raceway Before Tuyere of Blast Furnace depth calculation system that the present embodiment is provided, first acquisition module includes：

Construction unit, for according to Euler's model, building the mechanism model of the raceway zone depth, the mechanism model tool Body is：

Wherein, k is tubulence energy, and ε is tubulence energy dissipative shock wave, G_kThe Turbulent Kinetic that expression is produced by laminar velocity gradient, G_b It is the Turbulent Kinetic that buoyancy is produced, Y_MIt is the fluctuation of the diffusion generation of transition, σ in compressible turbulent flow_kAnd σ_εIt is k equations and ε The turbulent flow Prandtl numbers of equation, C in formula_1ε=1.44, C_2ε=1.92, C_3ε=0.09, C_μ=0.09, σ_k=1.0, σ_ε=1.3, S_kAnd S_εIt is constant；

Determining unit, the boundary condition for determining the mechanism model, the boundary condition includes the near wall region of furnace wall Domain using Standard law of wall, speed entrance boundary be set at air port, set pressure export condition, model at model upper outlet Symmetrical two sides usage cycles loop boundary and dead stock column surface uses wall condition；

First processing units, for according to the mechanism model and the boundary condition, drawing the calculating of raceway zone depth As a result.

In a kind of In Raceway Before Tuyere of Blast Furnace depth calculation system that the present embodiment is provided, the structure module includes：

First acquisition unit, the stressing conditions for obtaining raceway zone；

Obtaining unit, for obtaining the parameter；

Second processing unit, for according to the stressing conditions and the parameter, calculating the penetrating coefficient of the raceway zone, The penetrating coefficient is

3rd processing unit, for according to the penetrating coefficient, fitting to obtain the computation model of the raceway zone depth.

In a kind of In Raceway Before Tuyere of Blast Furnace depth calculation system that the present embodiment is provided, the raceway zone gas temperature is one Fixed value.

In a kind of In Raceway Before Tuyere of Blast Furnace depth calculation system that the present embodiment is provided, the bosh coal gas density is coal gas Percentage shared by the molecular weight of middle each component.

By the system that the embodiment of the present invention two is introduced, to implement the In Raceway Before Tuyere of Blast Furnace depth of the embodiment of the present invention one The system that degree computational methods are used, so the method introduced based on the embodiment of the present invention one, the affiliated personnel in this area can Understand concrete structure and the deformation of the system, so will not be repeated here.What the method for every embodiment of the present invention one was used System belongs to the scope to be protected of the invention.

The technical scheme provided in the embodiment of the present application, at least has the following technical effect that or advantage：

One or more technical schemes provided in the embodiment of the present invention, at least have the following technical effect that or advantage：

1st, the method that the embodiment of the present application is provided, the convolution result obtained using Euler's model obtains the raceway zone depth Changing Pattern, and according to the Changing Pattern, obtain the parameter related to the raceway zone depth, further according to the parameter, The computation model of the raceway zone depth is built, so as to calculate raceway zone depth, can be calculated using less parameter Raceway zone depth, solves the problems, such as that the realization of existing utilization Euler Model Calculating Method is complicated low with efficiency, greatly simplifies The complexity of raceway zone depth calculation, and reduce the calculating time, improve computational efficiency.

2nd, the system that the embodiment of the present application is provided, builds what module was obtained using the second acquisition module according to Changing Pattern Parameter, builds the computation model of the raceway zone depth, so as to calculate raceway zone depth, can be calculated using less parameter Raceway zone depth is obtained, solves the problems, such as that the realization of existing utilization Euler Model Calculating Method is complicated low with efficiency, significantly The complexity of raceway zone depth calculation is simplified, and reduces the calculating time, improve computational efficiency.

, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent Select embodiment and fall into having altered and changing for the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification without deviating from this hair to the embodiment of the present invention The spirit and scope of bright embodiment.So, if these modifications of the embodiment of the present invention and modification belong to the claims in the present invention And its within the scope of equivalent technologies, then the present invention is also intended to comprising these changes and modification.

Claims (10)

1. a kind of In Raceway Before Tuyere of Blast Furnace depth computing method, it is characterised in that including：

The result of calculation of the raceway zone depth that acquisition is obtained using Euler's model；

According to the result of calculation, the Changing Pattern of the raceway zone depth is obtained；

According to the Changing Pattern, obtain the parameter related to the raceway zone depth, the parameter including bosh coal gas density, Coke size, coal gas volume flow rate, the air port gross area, raceway zone gas temperature and hot-blast pressure before Coke density, air port；

According to the parameter, the computation model of the raceway zone depth is built, the computation model is：

$D_R=0.41\×{\[\frac{{\mathrm{\ρ}}_o}{{\mathrm{\ρ}}_s\×D_P}{\left(\frac{V_g}{S_T}\right)}^2\frac{T_r}{P_b\×298}\]}^{0.69}---\left(1\right)$

Wherein, D_RIt is raceway zone depth, ρ_oIt is bosh coal gas density, ρ_sIt is Coke density, D_PIt is coke size before air port, V_gIt is coal Air volume flow rate, S_TIt is the air port gross area, T_rRaceway zone gas temperature, P_bHot-blast pressure.

2. the method for claim 1, it is characterised in that the raceway zone depth that the acquisition is obtained using Euler's model Result of calculation, including：

According to Euler's model, the mechanism model of the raceway zone depth is built, the mechanism model is specially：

$\frac{\∂\left(\mathrm{\ρ}k\right)}{\∂t}+\frac{\∂\left({\mathrm{\ρku}}_i\right)}{\∂x_i}=\frac{\∂}{\∂x_j}\[(\mathrm{\μ}+\frac{{\mathrm{\μ}}_t}{{\mathrm{\σ}}_k})\frac{\∂k}{\∂x_j}\]+G_k-\mathrm{\ρ}\mathrm{\ϵ}+G_b-Y_M+S_k---\left(2\right)$

$\frac{\∂\left(\mathrm{\ρ}\mathrm{\ϵ}\right)}{\∂t}+\frac{\∂\left({\mathrm{\ρ\ϵu}}_i\right)}{\∂x_i}=\frac{\∂}{\∂x_j}\[(\mathrm{\μ}+\frac{{\mathrm{\μ}}_t}{{\mathrm{\σ}}_{\mathrm{\ϵ}}})\frac{\∂\mathrm{\ϵ}}{\∂x_j}\]+C_{1\mathrm{\ϵ}}\frac{\mathrm{\ϵ}}{k}(G_k+C_{3\mathrm{\ϵ}}{G}_b)-C_{2\mathrm{\ϵ}}\mathrm{\ρ}\frac{{\mathrm{\ϵ}}^2}{k}+S_{\mathrm{\ϵ}}---\left(3\right)$

${\mathrm{\μ}}_t={\mathrm{\ρC}}_{\mathrm{\μ}}\frac{k^2}{\mathrm{\ϵ}}---\left(4\right)$

Wherein, k is tubulence energy, and ε is tubulence energy dissipative shock wave, and ρ is molten steel density, G_kThe rapids that expression is produced by laminar velocity gradient The energy of flow, G_bIt is the Turbulent Kinetic that buoyancy is produced, Y_MIt is the fluctuation of the diffusion generation of transition, σ in compressible turbulent flow_kAnd σ_εIt is The turbulent flow Prandtl numbers of k equations and ε equations, C in formula_1ε=1.44, C_2ε=1.92, C_3ε=0.09, C_μ=0.09, σ_k=1.0, σ_ε=1.3, S_kAnd S_εIt is constant；

Determine the boundary condition of the mechanism model, the boundary condition includes that the near-wall region of furnace wall uses standard law of wall letter Number, speed entrance boundary is set at air port, is set the symmetrical two sides of pressure export condition, model at model upper outlet and is used Loop cycle border and dead stock column surface use wall condition；

According to the mechanism model and the boundary condition, the result of calculation of raceway zone depth is obtained.

3. the method for claim 1, it is characterised in that according to the parameter, build the calculating of the raceway zone depth Model, including：

Obtain the stressing conditions of raceway zone；

Obtain the parameter；

According to the stressing conditions and the parameter, the penetrating coefficient of the raceway zone is calculated, the penetrating coefficient is

According to the penetrating coefficient, fitting obtains the computation model of the raceway zone depth.

4. the method for claim 1, it is characterised in that the raceway zone gas temperature is a fixed value.

5. the method for claim 1, it is characterised in that the bosh coal gas density is the molecular weight of each component in coal gas Shared percentage.

6. a kind of In Raceway Before Tuyere of Blast Furnace depth calculation system, it is characterised in that including：

First acquisition module, the result of calculation for obtaining the raceway zone depth obtained using Euler's model；

Module is obtained, for according to the result of calculation, obtaining the Changing Pattern of the raceway zone depth；

Second acquisition module, for according to the Changing Pattern, obtaining the parameter related to the raceway zone depth, the parameter Including coke size, coal gas volume flow rate, the air port gross area, raceway zone coal gas temperature before bosh coal gas density, Coke density, air port Degree and hot-blast pressure；

Module is built, for according to the parameter, building the computation model of the raceway zone depth, the computation model is：

Wherein, in formula (1), D_RIt is raceway zone depth, unit is m, ρ_oIt is bosh coal gas density, unit is kg/m³, ρ_sFor coke is close Degree, unit is kg/m³, D_PIt is coke size before air port, unit is m, V_gIt is coal gas volume flow rate, unit is m³/ s, S_TIt is air port The gross area, unit is m², T_rRaceway zone gas temperature, unit for DEG C, P_bHot-blast pressure, unit is MPa.

7. system as claimed in claim 6, it is characterised in that first acquisition module includes：

Construction unit, for according to Euler's model, building the mechanism model of the raceway zone depth, the mechanism model is specific For：

$\frac{\∂\left(\mathrm{\ρ}k\right)}{\∂t}+\frac{\∂\left({\mathrm{\ρku}}_i\right)}{\∂x_i}=\frac{\∂}{\∂x_j}\[(\mathrm{\μ}+\frac{{\mathrm{\μ}}_t}{{\mathrm{\σ}}_k})\frac{\∂k}{\∂x_j}\]+G_k-\mathrm{\ρ}\mathrm{\ϵ}+G_b-Y_M+S_k---\left(2\right)$

$\frac{\∂\left(\mathrm{\ρ}\mathrm{\ϵ}\right)}{\∂t}+\frac{\∂\left({\mathrm{\ρ\ϵu}}_i\right)}{\∂x_i}=\frac{\∂}{\∂x_j}\[(\mathrm{\μ}+\frac{{\mathrm{\μ}}_t}{{\mathrm{\σ}}_{\mathrm{\ϵ}}})\frac{\∂\mathrm{\ϵ}}{\∂x_j}\]+C_{1\mathrm{\ϵ}}\frac{\mathrm{\ϵ}}{k}(G_k+C_{3\mathrm{\ϵ}}{G}_b)-C_{2\mathrm{\ϵ}}\mathrm{\ρ}\frac{{\mathrm{\ϵ}}^2}{k}+S_{\mathrm{\ϵ}}---\left(3\right)$

${\mathrm{\μ}}_t={\mathrm{\ρC}}_{\mathrm{\μ}}\frac{k^2}{\mathrm{\ϵ}}---\left(4\right)$

Wherein, k is tubulence energy, and ε is tubulence energy dissipative shock wave, G_kThe Turbulent Kinetic that expression is produced by laminar velocity gradient, G_bIt is floating The Turbulent Kinetic that power is produced, Y_MIt is the fluctuation of the diffusion generation of transition, σ in compressible turbulent flow_kAnd σ_εIt is k equations and ε equations Turbulent flow Prandtl numbers, C in formula_1ε=1.44, C_2ε=1.92, C_3ε=0.09, C_μ=0.09, σ_k=1.0, σ_ε=1.3, S_kAnd S_ε It is constant；

Determining unit, the boundary condition for determining the mechanism model, the boundary condition includes that the near-wall region of furnace wall makes With setting speed entrance boundary at Standard law of wall, air port, to set pressure export condition, model at model upper outlet symmetrical Two sides usage cycles loop boundary and dead stock column surface use wall condition；

First processing units, for according to the mechanism model and the boundary condition, drawing the result of calculation of raceway zone depth.

8. system as claimed in claim 6, it is characterised in that the structure module includes：

First acquisition unit, the stressing conditions for obtaining raceway zone；

Obtaining unit, for obtaining the parameter；

Second processing unit, it is described for according to the stressing conditions and the parameter, calculating the penetrating coefficient of the raceway zone Penetrating coefficient is

3rd processing unit, for according to the penetrating coefficient, fitting to obtain the computation model of the raceway zone depth.

9. system as claimed in claim 6, it is characterised in that the raceway zone gas temperature is a fixed value.

10. system as claimed in claim 6, it is characterised in that the bosh coal gas density is the molecule of each component in coal gas The shared percentage of amount.