CN104267764B - Coke oven standard temperature dynamic optimization method - Google Patents

Abstract

The invention discloses a kind of coke oven standard temperature dynamic optimization method, utilize coke Maturity C dynamic optimization coke oven heating standard temperature, the method can be applied directly in coke oven production process, hence it is evident that reduces energy consumption of unit product, improve product recovery rate.

Description

Coke oven standard temperature dynamic optimization method

Technical field

The invention belongs to coking by coke oven Technology, energy-saving and cost-reducing field, be specifically related to dynamically adjust Jiao with coke maturity indices The method of the standard temperature of stove heating.

Background technology

China is whole world coking production the first big country, and the big and small coke oven in the whole nation has thousands of seat, and standard temperature is coke oven heating During a very important technological parameter, domestic the overwhelming majority coal chemical enterprises in process of production be often the most true A fixed numerical value, owing to lacking an effective criterion, standard temperature is often inconsistent with the actual demand of coke oven heating, The most often occur that green coke or coke overdo phenomenon, had both affected coke quality, and have wasted again the energy.

In the open patent (ZL 201210107382.9) authorized that inventor rather virtue is blue or green, defining coke Maturity K is (τ_c-τ_m)/τ_c, in formula:

K coke Maturity,

τ_c-coking cycles, starts the time terminated to coke pushing from coalingging, and unit is minute (min),

τ_m-fire falls the time, refers to the time starting to peak to raw gas temperature from coalingging, and unit is minute (min),

(τ_c–τ_m) representing the cold stoking time, unit is minute (min), the time of the coke pushing that peaks from raw gas temperature； And judge according to the change STRENGTH ON COKE Maturity of raw gas temperature.

But production process can only be instructed by determination methods that above-mentioned patent provides qualitatively, answering in putting into practice in production operation With still there being a certain distance.

Summary of the invention

The present invention is directed to technical problem present in the production of existing coke oven, it is provided that a kind of coke oven standard temperature dynamic optimization method, Utilizing coke Maturity C dynamic optimization coke oven heating standard temperature, the method can be applied directly in coke oven production process, bright Show and reduce energy consumption of unit product, improve product recovery rate.

For reaching above-mentioned purpose, the technical scheme that the present invention provides is:

A kind of coke oven standard temperature dynamic optimization method, comprises the following steps:

(1) coke Maturity C, described coke Maturity C=are automatically generated according to the change of raw gas temperature in process of coking (τ_c-τ_m)/τ_c, wherein:

τ_c-coking cycles, starts the time terminated to coke pushing from coalingging, and unit is minute (min),

τ_m-fire falls the time, refers to the time starting to peak to raw gas temperature from coalingging, and unit is minute (min),

(τ_c–τ_m) representing the cold stoking time, unit is minute (min), the time of the coke pushing that peaks from raw gas temperature；

(2) for the assay result of coke quality corresponding to different coal blendings, determine that the optimum coke of each coal blending becomes respectively Ripe degree, sets up optimum coke Maturity data base；

(3) deviation delta C between its optimum coke Maturity in the actual coke Maturity of current coal blending i and data base is calculated_i, right Coke oven standard temperature carries out dynamic optimization, and the on-line optimization value of coke oven standard temperature is:

$T_0+K_P*{\mathrm{\ΔC}}_i\left(t_k\right)+K_I*\underset{I=1}{\overset{k}{\mathrm{\Σ}}}{\mathrm{\ΔC}}_i\left(t_I\right)$

T₀---current empirical criteria temperature；

K_P---scale modifier (K_PScope 100～300)；

K_I---accumulation correction (K_IScope 50～100)；

ΔC_i(t_k)---t_kThe coke Maturity deviation in moment, t_kSampling interval be 4 hours；

ΔC_i(t_I)---t_IThe coke Maturity deviation in moment, t_ISampling interval is coking cycles 1/2nd；

Number of times is revised in k---accumulation.

Further, step 1) in, in coke oven coke oven uprising tube root or bridge tube position, NI-G-Nickel-Silicom thermocouple is installed, by thermoelectricity In even signal input computer control system, can automatically calculate coke Maturity C through program calculation technology control system.

Further, step 2) in, the assay result of described coke quality include fugitive constituent, cold strength and hot by force Degree.

Further, step 3) in, it is assumed that the actual coke Maturity of current coal blending i is C_i, corresponding optimum coke Maturity is C_i0, deviation is Δ C_i=C_i0-C_i；

If Δ C_i≤ 0, show that coke is ripe excessively, fixed higher of the standard temperature of coke oven heating, it should debase the standard temperature；

If Δ C_i> 0, show that coke is ripe not, fixed on the low side of the standard temperature of coke oven heating, it should improve standard temperature.

Further, step 3) in, accumulation is revised number of times k and is preferably 6.

Use the technical scheme that the present invention provides, compared with existing known technology, there is following remarkable result:

(1) temperature that debases the standard 10～40 DEG C；

(2) coke oven heating coal gas 2%～5% is saved；

(3) coke furnace carbonization chamber headroom and tedge calculus ink substantially reduce (changing product cracking to reduce), change Product recycling and carry High obvious.

Accompanying drawing explanation

Fig. 1 is the variation tendency schematic diagram of raw gas temperature；

Fig. 2 is raw gas temperature survey schematic diagram；

Fig. 3 is coke oven standard temperature dynamic optimization method flow chart of the present invention；

Wherein:

1, thermocouple；2, tedge；3, carbonization chamber；4, raw gas；5, bridge tube；6, coke oven；7, computer.

Detailed description of the invention

For further appreciating that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

First, in the present invention, definition and the automatic generation method of coke Maturity C are as follows:

(1) described coke Maturity C is defined as (τ_c-τ_m)/τ_c, in formula:

C coke Maturity,

τ_c-coking cycles, starts the time terminated to coke pushing from coalingging, and unit is minute (min),

τ_m-fire falls the time, refers to the time starting to peak to raw gas temperature from coalingging, and unit is minute (min),

(τ_c–τ_m) representing the cold stoking time, unit is minute (min), the time of the coke pushing that peaks from raw gas temperature；

(2) the automatically generating of coke Maturity C

Changing Pattern (as shown in Figure 1) according to raw gas temperature automatically generates coke Maturity；Raw gas temperature survey such as figure Shown in 2, in process of coking, the fugitive constituent in coal escapes from carbonization chamber 3, forms raw gas 4, and raw gas 4 is through rising Pipe 2, bridge tube 5 are finally pooled in discharge, enter next road production process；At the initial stage of coalingging, the amount of fugitive constituent is big, charcoal Changing room 3 temperature low, the temperature of raw gas 4 is relatively low, along with the rising of carbonization chamber 3 temperature, from the internal ease of carbonization chamber 3 Going out raw gas 4 temperature also to increase, rise to peak after about tens hours, normally referred to as fire drop point, fire falls the time τ_mReferring to the time starting to peak to raw gas temperature from coalingging, this period, coal has essentially become coke, waves Sending out part little, the heat taken away from carbonization chamber 3 is also little, so the temperature of raw gas 4 the most slowly declines, until coke pushing terminates, Coking cycles τ_cIt it is exactly the time starting from coalingging to terminate to coke pushing；

In coke oven coke oven uprising tube 2 root or bridge tube position, NI-G-Nickel-Silicom thermocouple 1 is installed, detects the variations in temperature of raw gas 4, Changing Pattern according to raw gas 4 temperature automatically generates coke Maturity.

Then, for different coal blendings, by the assay of Coke Quality (fugitive constituent, cold strength and hot strength), Determine optimum coke Maturity C respectively, set up optimum coke Maturity data base, be shown in Table one, wherein C_i0When being i for coal blending pair The optimum coke Maturity answered.

Table one: the optimum coke Maturity data under Coal rank

Coal

Coal blending1

Coal blending2

…

Coal blendingi

…

Coal blendingn

Optimal index

C10

C20

…

Ci0

…

Cn0

Embodiment 1

The coal blending 1 of certain factory is: Jin Yang coal 38%, osiery coking coal 16%, 1/3 coking coal 15%, common lean coal 19%, bottle coal 12%, Need to produce one-level burnt (fugitive constituent≤1.6, cold strength M10 >=80, cold strength M40 >=6, hot strength CSR >=65, Moisture≤3).Coke Maturity C in actual production process₁Between 1.25～1.8, according to the assay of Coke Quality, C₁Time between 1.25～1.3, coke quality index (fugitive constituent, cold strength, hot strength CSR) refers to close to coke quality The lower limit of mark (one-level is burnt), the most up to standard, affect coke quality；C₁When >=1.3, coke quality is up to standard；But C₁It is the biggest, Meaning that standard temperature is the highest, energy consumption is the biggest；Finally consider C₁Optimal value C₁₀It is 1.31.

Embodiment 2

The coal blending i of certain factory is: coking coal 10%, 1/3 coking coal 25%, the Huaibei face and melt coal 30%, Fengcheng coal 8%, common lean coal 15%, Liaocheng bottle coal 12%, need to produce two grades of Jiao (fugitive constituent≤1.9, cold strength M10 >=75, cold strength M40 >=6, hot Intensity CSR >=55, moisture≤8).Coke Maturity C in actual production process_iBetween 1.25～2.0, according to focusing carbonaceous The assay of amount, C_iTime between 1.25～1.38, coke quality index (fugitive constituent, cold strength, hot strength CSR) Close to the lower limit of coke quality index (two grades of Jiao), the most up to standard, affect coke quality；C_iWhen >=1.38, coke quality reaches Mark；But C_iThe biggest, it is meant that standard temperature is the highest, energy consumption is the biggest；Finally consider C_iOptimal value C_i0It is 1.39.

Embodiment 3

In embodiment 1 as a example by the coal blending 1 of certain factory, the coke oven used in process of coking is 5.5 meters of tamping type coke ovens, during coking Between be 24 hours, machine, standard temperature T of coke side₀Rule of thumb it is identified as 1350 DEG C and 1360 DEG C.Coke oven standard temperature Dynamic optimization method flow process is as shown in Figure 3.

In order to automatically generate coke Maturity, need to detect the Changing Pattern of raw gas temperature, therefore at bridge tube, thermocouple need to be installed, Due to raw gas temperature substantially between 200～900 DEG C, therefore select NI-G-Nickel-Silicom thermocouple proper, and coke oven 6 is joined In the control system of the thermocouple signal input computer 7 of coal, automatically calculate through program calculation technology control system.For Coke Maturity C of coal blending 1 reality₁Basic between 1.4～1.8.

According to the specific descriptions in embodiment 1, optimum coke Maturity C of coal blending 1₁₀Should be 1.31, with coke Maturity C₁₀ Being 1.31 for target, the standard temperature method for on-line optimization provided by the present invention carries out dynamic optimization to standard temperature:

Current empirical criteria temperature is T₀, then the on-line optimization value of standard temperature is:

$T_0+K_P*{\mathrm{\ΔC}}_i\left(t_k\right)+K_I*\underset{I=1}{\overset{k}{\mathrm{\Σ}}}{\mathrm{\ΔC}}_i\left(t_I\right)$

K_P---scale modifier (K_PScope 100～300)；

K_I---accumulation correction (K_IScope 50～100)；

ΔC_i(t_k)--t_kThe coke Maturity deviation in moment, t_kSampling interval be 4 hours；

ΔC_i(t_I)---t_IThe coke Maturity deviation in moment, t_ISampling interval is coking cycles 1/2nd；

It is 6 that number of times k is revised in accumulation.

Pusher side standard temperature basic controlling is in the range of 1310～1340 DEG C, and coke side standard temperature basic controlling is 1320～1350 In the range of DEG C, standard temperature reduces 10～40 DEG C, draws according to production report statistics, and annual reduces 25 DEG C.Saving adds Heating gas 3.9%, changes product recovery rate and improves notable.

Schematically being described the present invention and embodiment thereof above, this description does not has restricted, shown in accompanying drawing yet Simply one of embodiments of the present invention, actual structure is not limited thereto.So, if those of ordinary skill in the art Enlightened by it, in the case of without departing from the invention objective, design the knot similar to this technical scheme without creative Structure mode and embodiment, all should belong to protection scope of the present invention.

Claims (6)

1. a coke oven standard temperature dynamic optimization method, it is characterised in that comprise the following steps:

(1) coke Maturity C, described coke are automatically generated according to the change of raw gas temperature in process of coking Maturity C=(τ_c-τ_m)/τ_c, wherein:

τ_c-coking cycles, starts the time terminated to coke pushing from coalingging, and unit is minute,

τ_m-fire falls the time, refers to the time starting to peak to raw gas temperature from coalingging, and unit is for dividing Clock,

(τ_c–τ_m) represent the cold stoking time, unit is minute, from raw gas temperature peak coke pushing time Between；

(2) for the assay result of coke quality corresponding to different coal blendings, each coal blending is determined respectively Optimum coke Maturity, sets up optimum coke Maturity data base；

(3) calculate in the actual coke Maturity of current coal blending i and data base between its optimum coke Maturity Deviation delta C_i, coke oven standard temperature is carried out dynamic optimization, the on-line optimization value of coke oven standard temperature is:

$T_0+K_P*{\mathrm{\ΔC}}_i\left(t_k\right)+K_1*\underset{I=1}{\overset{k}{\Σ}}{\mathrm{\ΔC}}_i\left(t_I\right)$

T₀---current empirical criteria temperature；

K_P---scale modifier；

K_I---accumulation correction；

ΔC_i(t_k)---t_kThe coke Maturity deviation in moment, t_kSampling interval be 4 hours；

ΔC_i(t_I)---t_IThe coke Maturity deviation in moment, t_ISampling interval is coking cycles 1/2nd；

Number of times is revised in k---accumulation.

2. coke oven standard temperature dynamic optimization method as claimed in claim 1, it is characterised in that step 1) in, In coke oven coke oven uprising tube root or bridge tube position, NI-G-Nickel-Silicom thermocouple is installed, thermocouple signal input is calculated In machine control system, can automatically calculate coke Maturity C through program calculation technology control system.

3. coke oven standard temperature dynamic optimization method as claimed in claim 1, it is characterised in that step 2) in, The assay result of described coke quality includes fugitive constituent, cold strength and hot strength.

4. coke oven standard temperature dynamic optimization method as claimed in claim 1, it is characterised in that step 3) in, The actual coke Maturity assuming current coal blending i is C_i, corresponding optimum coke Maturity is C_i0, deviation is Δ C_i =C_i0-C_i；

If Δ C_i≤ 0, show that coke is ripe excessively, fixed higher of the standard temperature of coke oven heating, it should reduce mark Quasi-temperature；

If Δ C_i> 0, show that coke is ripe not, fixed on the low side of the standard temperature of coke oven heating, it should improve mark Quasi-temperature.

5. coke oven standard temperature dynamic optimization method as claimed in claim 1, it is characterised in that step 3) in, K_PScope 100～300, K_IScope 50～100.

6. coke oven standard temperature dynamic optimization method as claimed in claim 1, it is characterised in that step 3) in, It is 6 that number of times k is revised in accumulation.