CN102534076A - Online energy efficiency analytic method and analyzer for blast furnace blower - Google Patents

Abstract

The invention relates to a method and equipment for online analysis, aiming at providing an online energy efficiency analytic method and an analyzer for a blast furnace blower. The online energy efficiency analytic method comprises the following steps of: acquiring operating data of the blast furnace blower by using a sensor; transmitting the operating data to an energy efficiency data calculation module through a transmitter and a signal receiving and processing module to obtain the energy efficiency of the blower; transmitting the energy efficiency data to an energy efficiency filter module for removing noise; and then transmitting the energy efficiency data subjected to noise removal to a display screen by using a programmable logic controller. According to the analytic method and the analyzer disclosed by the invention, real-time data of energy efficiency of the blower can be acquired and the management and optimized operation of the blower are facilitated; the acquired operating parameters are processed, so that the errors of energy efficiency calculation data due to noise caused by sampling can be effectively reduced; the programmable logic controller and a touch screen are used as hardware platforms, so that the analyzer has the characteristics of high reliability and low performance. The touch screen is matched with a mobile hard disk drive, so that historical data can be saved and recorded for a long term.

Description

Online efficiency analytical procedure of blast furnace blowing engine and analyser

Technical field

The present invention relates to the online efficiency analyser of a kind of blast furnace blowing engine.In particular, be the method and apparatus that carries out online calculating and analysis to the blast furnace blowing engine operational energy efficiency in the iron-smelting blast furnace.

Background technology

Metallurgical process industry is the energy, various raw-material product survivor, also is the main consumer of the energy, and is energy-saving and cost-reducing most important.China's metallurgical industry comprehensive energy consumption level is far above the M.L. in the whole world.With statistic data in 2007 was example, and the average iron-smelting fuel of China emphasis iron and steel enterprise in 2007 is than being 529.9kg/t, and the Shoudu Iron and Steel Co iron-smelting fuel is than being 466kg/t; Baoshan Iron and Steel Group is 483kg/t, and Taiyuan Iron and Steel Co. is 491kg/t, and the Hunan steel is 501kg/t; Magang Stocks Trading Co. is 503kg/t, and Xing Gang is 520kg/t.According to IISI's statistics, German Chland in 2006 is 486kg/t, and TaiWan, China is 488kg/t, the 15 state average out to 494kg/t of European Union, and South America is 496kg/t, Japan is 498kg/t.Can find out that from above situation the iron-smelting fuel ratio of international most advanced level is to be lower than 500kg/t.Enterprises such as the Shoudu Iron and Steel Co of China, Baosteel, Wuhan Iron and Steel Plant reach advanced world standards.But still there is big gap in the most of iron works of national emphasis iron and steel enterprise.

Ironmaking system is the general name of operations such as coking, sintering, ironmaking.The energy that this system directly consumes accounts for about 70% of Steel Complex's total energy consumption, is the energy-conservation emphasis of Steel Complex.Blast Furnace Blower System is as the heart of ironmaking system, and its energy consumption also occupies the major portion of ironmaking system.Blast furnace blast consumption proportion in the ironmaking process energy consumption is bigger.The blast furnace blast energy consumption accounts for ironmaking process energy consumption 10%～15%.Therefore the energy-saving and cost-reducing energy-saving and emission-reduction for metallurgy industry to Blast Furnace Blower System have great importance.

In order to reduce the energy consumption of air-blast system, to carry out comprehensive assessment and analysis to the efficiency of blast furnace blowing engine at first exactly.Efficiency through to gas blower is carried out real-time analysis, grasps the running status of gas blower, has crucial meaning for the efficiency and the Optimizing operation that improve gas blower.

Summary of the invention

The technical problem that the present invention will solve is, overcomes deficiency of the prior art, and online efficiency analytical procedure of a kind of blast furnace blowing engine and analyser are provided.For solving its technical problem, the technical scheme that the present invention takes is:

Provide a kind of blast furnace blowing engine online efficiency analytical procedure, may further comprise the steps:

(1) utilizes the data of inlet temperature, top hole pressure, temperature out, rate of discharge and the blower shaft power in sensor acquisition blast furnace blowing engine when operation, and be passed to the signal receiving processing module through transmitter;

(2) the signal receiving processing module is passed to the efficiency data computation module with service data, is obtained the efficiency η of gas blower according to following formula by the efficiency data computation module _b

${\mathrm{\ρ}}_{\mathrm{bo}}=\frac{(P_{\mathrm{bo}}+101.32)1000}{R(T_{\mathrm{bo}}+273.15)}---\left(1\right)$

$R=\frac{R_M}{M}---\left(2\right)$

C _p，m＝a ₀+a ₁T+a ₂T ²+a ₃T ³ (3)

${\mathrm{\Δh}}_{\mathrm{bo}}=\frac{1}{M}{\∫}_1^2{C}_{p,m}\mathrm{dT}---\left(4\right)$

${\mathrm{\Δh}}_{\mathrm{bo}}=\frac{1}{M}[a_0(T_{\mathrm{bo}}-T_{\mathrm{bi}})+\frac{a_1}{2}(T_{\mathrm{bo}}^2-T_{\mathrm{bi}}^2)+\frac{a_2}{3}(T_{\mathrm{bo}}^3-T_{\mathrm{bi}}^3)+\frac{a_3}{4}(T_{\mathrm{bo}}^4-T_{\mathrm{bi}}^4)]---\left(5\right)$

P _o＝Q _boρ _boΔh _bo (6)

η _b＝P _o/P _i (7)

In the above-mentioned formula:

ρ _BoBe the density of exit air, unit is kg/m ³P _BoBe the pressure at blower export place, unit is kPa; T _BoBe the temperature at blower export place, unit is ℃; For air, the value of M is 28.98kg/kmol, R _MBe 8314J/ (kmolK); C _{P, m}For the perfect gas molar heat capacity under constant pressure unit under the T temperature is kJ/ (kmolK); a ₀, a ₁, a ₂, a ₃Parameter for the perfect gas molar heat capacity under constant pressure; Δ h _BoBe the enthalpy increment of unit mass, unit is kJ/kg; T _BiBe the temperature at blower inlet place, unit is ℃; P _oBe the enthalpy increment of gas blower air, unit is kW; Q _BoBe the air flow quantity at blower export place, unit is m ³/ s; η _bEfficiency for gas blower; P _iBe blower shaft power, unit is kW;

(3) the efficiency data computation module is sent to the efficiency filtration module with the efficiency data, obtains removing the efficiency data behind the noise by the efficiency filtration module according to following formula;

${\mathrm{\η}}_b^{\mathrm{nf}}=(1-\mathrm{\α}){\mathrm{\η}}_b^n+{\mathrm{\α\η}}_b^{\mathrm{nf}-1}---\left(8\right)$

In the above-mentioned formula; The filtered value of efficiency that

expression is the n time;

is the n time efficiency value of calculating, the filtered value of efficiency that

expression is the n-1 time; The value of α presets according to gas blower operation field working conditions 0 to 1;

(4) the efficiency digital data that will remove behind the noise of programmable logic controller is passed to image display.

Among the present invention, surpass the value range of setting like the efficiency data of final acquisition, signal then gives the alarm.

In the step according to the invention (4), also comprise the efficiency data behind the removal noise are sent to data storage equipment.

Further, the present invention also provides a kind of online efficiency analyser of blast furnace blowing engine that is used for preceding method, comprises the transmitter and the programmable logic controller that are used to gather the gas blower service data; Built-in signal receiving processing module, efficiency data computation module and efficiency filtration module in the programmable logic controller; Signal receiving processing module, efficiency data computation module and efficiency filtration module are connected successively, and said transmitter is connected to the signal receiving processing module through transmitter; Said programmable logic controller is connected to image display through EPA.

As a kind of improvement, said image display is a touch-screen.

As a kind of improvement, also comprise the data storage equipment that is connected to said touch-screen through the USB2.0 type of transmission.

As a kind of improvement, said data storage equipment is a portable hard drive,

Realization principle of the present invention is:

At first, the intake condition when blast furnace blowing engine being moved (pressure, temperature) through programmable logic controller, outlet parameter (pressure, temperature, flow), shaft power is gathered and handle.Secondly, utilize the efficiency calculation formula of blast furnace blowing engine, computing is carried out in the real time data substitution of being gathered, obtain the real-time efficiency of blast furnace blowing engine, the compensation of the line correlation deviation of going forward side by side.At last, the efficiency with the data of being gathered and computing obtain shows on touch-screen.

Among the present invention; Wherein the gas blower efficiency is calculated the method that adopts energy balance; Wherein shaft power is as total intake; The output energy is then for bringing up to the pressure and temperature energy needed of outlet with cold wind by the pressure and temperature of import, and thermal losses that gas blower is inner and mechanical loss are then altogether as the loss of gas blower.Because the loss part can't be measured and calculate, the pressure and temp that gas blower is imported and exported also receives the influence of environment, therefore adopts the mode of deviation compensation to proofread and correct for last efficiency formula.

Among the present invention, wherein utilize programmable logic controller and touch-screen main hardware, make up the online efficiency analyser of gas blower as analyser.The touch-screen use portable hard drive of can arranging in pairs or groups carries out prolonged preservation with the gas blower operation history data of record.

Compared with prior art, the invention has the beneficial effects as follows:

1, the parameter of importing and exporting through the sampling gas blower; Carry out the analysis of material balance, energy balance; Can comprehensively understand the operation conditions of gas blower thus, thus the real time data of acquisition gas blower efficiency, convenient operational management and Optimizing operation to gas blower.

2. utilize the LPF algorithm, the operating parameter of gathering is handled, can effectively reduce because the efficiency data calculated mistake that the noise that brings of sampling causes.

3, adopt programmable logic controller and touch-screen as hardware platform, have the cheap characteristics of high reliability and performance.And adopt touch-screen to arrange in pairs or groups mutually with portable hard drive, make historical data can obtain secular preservation and record.

Description of drawings

Fig. 1 is a blast furnace blowing engine operating parameter instrumentation plan;

Fig. 2 calculates synoptic diagram for the blast furnace blowing engine efficiency;

Fig. 3 is a first-order lag filtering algorithm synoptic diagram;

Fig. 4 is blast furnace blowing engine efficiency analyzer system figure.

Embodiment

With reference to figures 1 through 4, will describe the present invention below.

At first need to prove, the present invention relates to the application of programmable logic controller in Industry Control.In implementation procedure of the present invention, can relate to the application that is built in a plurality of software function modules in the programmable logic controller.The applicant thinks, as read over application documents, accurately understand realization principle of the present invention and goal of the invention after, under the situation that combines existing known technology, those skilled in the art can use the software programming technical ability of its grasp to realize the present invention fully.The aforementioned software functional module includes but not limited to: signal receiving processing module, efficiency data computation module, efficiency filtration module etc., and this category of all genus that all application documents of the present invention are mentioned, the applicant enumerates no longer one by one.Programmable logic controller then is the electronic installation that a kind of very common digital operation of under industrial environment, using is operated, and its type selecting can be accomplished according to practical situation by the user, the S7 series and the serial product of TP that can select for use Siemens Company to produce among the present invention.

Fig. 1 representes to calculate among the present invention the blast furnace blowing engine efficiency and calculates the parameters needed measuring vol, comprising the inlet temperature of blast furnace blowing engine, and the shaft power of top hole pressure, temperature, flow and blast furnace blowing engine.Here it should be noted that all measurements all need satisfy such as requirements such as transmitter installation sites.

Fig. 2 representes blast furnace blowing engine efficiency calculation procedure among the present invention.Wherein key step is following:

1) density p of calculating exit air _Bo(unit is kg/m ³):

${\mathrm{\ρ}}_{\mathrm{bo}}=\frac{(P_{\mathrm{bo}}+101.32)1000}{R(T_{\mathrm{bo}}+273.15)}---\left(1\right)$

In the formula (1), P _BoBe the air pressure (unit is kPa) in exit, T _BoBe the AT in exit (unit be ℃).

$R=\frac{R_M}{M}---\left(2\right)$

For its M value of air be: 28.98kg/kmol; R _MBe 8314J/ (kmolK).

2) enthalpy drop of unit mass is:

The perfect gas molar heat capacity under constant pressure C of (unit is K) under the T temperature _{P, m}(unit is kJ/ (kmolK)), can be by computes:

C _p，m＝a ₀+a ₁T+a ₂T ²+a ₃T ³ (3)

Here, a ₀, a ₁, a ₂, a ₃The parameter of expression perfect gas molar heat capacity under constant pressure;

So enthalpy increment Delta h of unit mass _Bo(unit is kJ/kg) does

${\mathrm{\Δh}}_{\mathrm{bo}}=\frac{1}{M}{\∫}_1^2{C}_{p,m}\mathrm{dT}---\left(4\right)$

Therefore can get

${\mathrm{\Δh}}_{\mathrm{bo}}=\frac{1}{M}[a_0(T_{\mathrm{bo}}-T_{\mathrm{bi}})+\frac{a_1}{2}(T_{\mathrm{bo}}^2-T_{\mathrm{bi}}^2)+\frac{a_2}{3}(T_{\mathrm{bo}}^3-T_{\mathrm{bi}}^3)+\frac{a_3}{4}(T_{\mathrm{bo}}^4-T_{\mathrm{bi}}^4)]---\left(5\right)$

In the formula (5), T _BiBe the AT in exit (unit be ℃).

3) the enthalpy increment P of gas blower air _o(unit is kW):

P _o＝Q _boρ _boΔh _bo (6)

In the formula (6), Q _Bo(unit is m for the air flow quantity in exit ³/ s).

4) the efficiency η of gas blower _b:

η _b＝P _o/P _i (7)

In the formula (7), P _iBe blower shaft power, unit is kW;

In order to eliminate the error that noise causes, the present invention adopts the first-order lag filtering algorithm that the efficiency of calculating is carried out filtering, removes noise.Filtering algorithm is:

${\mathrm{\η}}_b^{\mathrm{nf}}=(1-\mathrm{\α}){\mathrm{\η}}_b^n+{\mathrm{\α\η}}_b^{\mathrm{nf}-1}---\left(8\right)$

Here the filtered value of efficiency that

expression is the n time; is the n time efficiency value of calculating, the filtered value of efficiency that

expression is the n-1 time.The value of α can be made amendment according to field condition 0 to 1.Fig. 3 is the schema of filtering algorithm.

Fig. 4 representes blast furnace blowing engine efficiency analyzer system figure.Wherein programmable logic controller and touch-screen adopt EPA to carry out data to be connected.Touch-screen carries out data storage through USB2.0 and portable hard drive.

Claims (7)

1. the online efficiency analytical procedure of blast furnace blowing engine is characterized in that, may further comprise the steps:

(1) utilizes the data of inlet temperature, top hole pressure, temperature out, rate of discharge and the blower shaft power in sensor acquisition blast furnace blowing engine when operation, and be passed to the signal receiving processing module through transmitter;

(2) the signal receiving processing module is passed to the efficiency data computation module with service data, is obtained the efficiency η of gas blower according to following formula by the efficiency data computation module _b

C _p，m＝a ₀+a ₁T+a ₂T ²+a ₃T ³ (3)

P _o＝Q _boρ _boΔh _bo (6)

η _b＝P _o/P _i (7)

In the above-mentioned formula:

ρ _BoBe the density of exit air, unit is kg/m ³P _BoBe the pressure at blower export place, unit is kPa; T _BoBe the temperature at blower export place, unit is ℃; For air, the value of M is 28.98kg/kmol, R _MBe 8314J/ (kmolK); C _{P, m}For the perfect gas molar heat capacity under constant pressure unit under the T temperature is kJ/ (kmolK); a ₀, a ₁, a ₂, a ₃Parameter for the perfect gas molar heat capacity under constant pressure; Δ h _BoBe the enthalpy increment of unit mass, unit is kJ/kg; T _BiBe the temperature at blower inlet place, unit is ℃; P _oBe the enthalpy increment of gas blower air, unit is kW; Q _BoBe the air flow quantity at blower export place, unit is m ³/ s; η _bEfficiency for gas blower; P _iBe blower shaft power, unit is kW;

(3) the efficiency data computation module is sent to the efficiency filtration module with the efficiency data, obtains removing the efficiency data behind the noise by the efficiency filtration module according to following formula;

In the above-mentioned formula; The filtered value of efficiency that

expression is the n time;

is the n time efficiency value of calculating, the filtered value of efficiency that

expression is the n-1 time; The value of α presets according to gas blower operation field working conditions 0 to 1;

(4) the efficiency digital data that will remove behind the noise of programmable logic controller is passed to image display.

2. method according to claim 1 is characterized in that, surpasses the value range of setting like the efficiency data of final acquisition, and signal then gives the alarm.

3. method according to claim 1 is characterized in that, in the said step (4), also comprises the efficiency data behind the removal noise are sent to data storage equipment.

4. the online efficiency analyser of blast furnace blowing engine that is used to realize the said method of claim 1 comprises the transmitter that is used to gather the gas blower service data, it is characterized in that this analyser also comprises programmable logic controller; Built-in signal receiving processing module, efficiency data computation module and efficiency filtration module in the programmable logic controller; Signal receiving processing module, efficiency data computation module and efficiency filtration module are connected successively, and said transmitter is connected to the signal receiving processing module through transmitter; Said programmable logic controller is connected to image display through EPA.

5. the online efficiency analyser of blast furnace blowing engine according to claim 4 is characterized in that said image display is a touch-screen.

6. the online efficiency analyser of blast furnace blowing engine according to claim 5 is characterized in that, also comprises the data storage equipment that is connected to said touch-screen through the USB2.0 type of transmission.

7. the online efficiency analyser of blast furnace blowing engine according to claim 6 is characterized in that said data storage equipment is a portable hard drive.

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