CN101718592A - Method for determining standard temperature of stamp-charging coke oven - Google Patents

Abstract

The invention discloses a method for determining the standard temperature of a stamp-charging coke oven. In the method, coke is judged to be ripe by taking a reference of guaranteeing a setting time of 1-1.5 hours of the coke between fire off time and coke pushing time so as to continuously improve or reduce the standard temperature of the coke oven and finally determine the standard temperature of the stamp-charging coke oven, wherein the fire off time of coal as fired represents the time of the coke having a fire off phenomenon, and when the fire off phenomenon is judged, an observation hole for observing the color of raw gas in the coke oven needs to be arranged in an ascending tube of a coke oven carbonization chamber so as to judge the fire off phenomenon, wherein the observation hole has a distance of 400 millimeters with the top of the oven, and the observation hole is upwards obliquely provided with a connecting tube with a cover. The method has simple and practicable steps and can accurately judge the ripe condition of the coke so as to further conveniently and reasonably determine the standard heating temperature of the stamp-charging coke oven.

Description

Method for determining standard temperature of stamp-charging coke oven

Technical field

The present invention relates to the heating cycle of tamping coke furnace in the metallurgy industry, particularly a kind of method for determining standard temperature of stamp-charging coke oven.

Background technology

Heating cycle is the important content of coke oven thermal technology management.Be to guarantee the coke maturation, every coke oven all should be according to different rhythm of production, go into the different heating cycle of establishment such as stove moisture content of coal.

The charge of coke central temperature is an important indicator judging that full carbonization chamber coke is whether ripe.Usually 30min charge of coke before the coke pushing is reached the 950-1050 ℃ of sign as its maturation.The charge of coke central temperature is at two coal ports in the mechanical coke both sides of the carbonization chamber of having adorned coal (dedusting mouth), and by the upper, middle and lower differing heights, each vertically inserts the thermopair of three different lengths and measures.From coalingging, per hour measure once, before coke pushing till the 30min.With the mean value of 6 temperature of both sides upper, middle and lower of recording for the last time as the charge of coke central temperature.

Tamping coke furnace is because its operational characteristic determines that the bulk density of going into the stove coal is all about 1.05.For such bulk density, want that the thermometric iron pipe is vertically inserted difficulty and well imagine.Because the job step difficulty, we use furnace roof space temperature numerical value to carry out reference mostly for the judgement of charge of coke mature condition.But we know the height of furnace roof space temperature and carbonization chamber is coaling highly and flame combustion chamber burning length all has relation, can not truly reflect coke mature condition in the carbonization chamber, also promptly can not heat definite rationally whether accurately the judging of standard temperature coke oven.

Also have fraternal producer to adopt and lead installation infrared thermometer acquisition coke temperature value on the burnt grid, but the temperature that this method measures only can be represented the measuring point surface temperature, can not reflect the mature condition and the temperature of charge of coke center comprehensively at coke guide.

Therefore, how succinctly to judge the coke mature condition exactly, and then judge that the whether reasonable of coke oven heating cycle just becomes a problem needing solution in the tamping coke furnace actual production badly.

Summary of the invention

The object of the present invention is to provide a kind of method for determining standard temperature of stamp-charging coke oven, this method operation steps is simple, and the STRENGTH ON COKE mature condition judges exactly, thereby further facilitates the heating standard temperature of reasonably determining tamping coke furnace.

The object of the present invention is achieved like this: a kind of method for determining standard temperature of stamp-charging coke oven, this method is to guarantee that coke falls constantly to coke pushing 1-1.5 hour putting the time arranged between the two constantly at its fire, coke just maturation be foundation, if the time of putting is less than 1 hour, illustrate that the coke oven standard temperature is fixed low; If the time of putting was longer than 1.5 hours, illustrate that the coke oven standard temperature is fixed high; With this, improve constantly or reduce the coke oven standard temperature, thereby finally determine the standard temperature of tamping coke furnace;

Wherein: the fire of going into the stove coal falls to constantly being meant that coking coal fire takes place falls moment of phenomenon, when judging, phenomenon that said fire is fallen to install at coke furnace carbonization chamber tedge place in order to observe the viewport of raw gas color in the coke oven, so that the fire phenomenon that falls is judged, viewport is apart from least 400 millimeters on furnace roof, and this viewport place is inclined upwardly a connecting pipe that has lid is being set.

" fire falls to managing " is actually is exactly the judgement of charge of coke maturation." fire falls " speech derives from Japan." fire falls " is a kind of phenomenon of outwardness in the coking production run, and it is the sign that charge of coke is mature on the whole.Japan adopts " the standard fire falls the time " method to carry out coke oven heating management.The traditional method of this method and China is different, and the traditional coke oven heating management method of China is " standard temperature " method.

Utilize mixed coal some inherent feature in the carbonization chamber retort process, can judge the moment that the phenomenon that fires takes place, this cries " fire falls constantly " constantly, coalings certainly constantly to the fire institute's elapsed time constantly that falls, and just cries " fire falls the time ".After the coking time of coke oven is determined, just must determine " the target fire falls the time " of coke oven heating, it is the basis of coke oven thermal technology management.Fall the moment to coke pushing moment institute's elapsed time " putting the time " from fire, charge of coke is being put time phase, the heating cycle of coke oven remains unchanged, and mainly is to allow the further homogenising of being heated of charge of coke each point, and makes the charge of coke central temperature progressively be increased to the finishing temperature of coking.

The judgement of " fire falls " need be observed by the raw gas change color that naked eyes are derived carbonization chamber.Usually adopt fire to fall to managing, the viewport that fire falls to judging usefulness just is installed at the tedge place when engineering construction.

Received heat supplies, needs the influence of balance, and " fire falls constantly " is in the process of heating up in a steamer it is a running point.Heat is supplied with when bigger than normal, fire fall phenomenon the generation meeting earlier, heat is supplied with when less than normal, fire falls generation meeting evening of phenomenon.Thermal technology's management technique of " fire falls to managing ", its key are the moment that " fire falls " takes place in the control coking process.The deviation that makes actual " fire falls the time " and " the target fire falls the time " within the limits prescribed, make the coking effect reach the charge of coke full maturity and the heat that consumed minimum.Using fire to fall to observing original intention as tamping coke furnace is for judging the ripe situation of charge of coke, how judging whether just passable the charge of coke maturation is so only need understand.

Show by practice, utilize the key content in " fire falls " management: the fire judgement constantly that falls, guarantee between 1-1.5h, to determine the ripe situation of coke with " putting the time ", thereby judge that coke oven heating mark temperature formulates rationally whether and make adjustment, it is effective that this method of finally determining the coke oven standard temperature is used in tamping coke furnace.In addition, we observe to determine the fall appearance of time of fire by the fire viewport that falls, be not that " standard temperature " method with thermal technology management changes " target fire fall control " method into, can realize judgement with viewport the charge of coke mature condition so only need segmentation to select 4-5 tedge that the fire judgement that falls is installed.

The inventive method utilizes " fire falls " phenomenon that occurs in the destructive distillation later stage into the stove coal to judge the mature condition of coke, then adjust and determine the standard temperature of tamping coke furnace, solve standard temperature of stamp-charging coke oven effectively and formulated whether reasonable checking difficult problem, make standard temperature of stamp-charging coke oven determine that this method operation steps is simple, easy to use simply, accurately.

Description of drawings

The invention will be further described below in conjunction with accompanying drawing.

Accompanying drawing is the position view of the viewport of opening in the methods of the invention.

Embodiment

A kind of method for determining standard temperature of stamp-charging coke oven, this method is to guarantee that coke falls constantly to coke pushing 1-1.5 hour putting the time arranged between the two constantly at its fire, coke just maturation be foundation, if the time of putting is less than 1 hour, illustrate that fire has fallen the evening of generation constantly, the coke oven heat is supplied with less than normal, and the coke oven standard temperature is fixed low, just needs to increase heat and supplies with; If the time of putting was longer than 1.5 hours, illustrate that fire has fallen the morning of generation constantly, the coke oven heat is supplied with bigger than normal, and the coke oven standard temperature is fixed high, just need reduce heat and supply with; With this, improve constantly or reduce the coke oven standard temperature, thereby finally determine the standard temperature of tamping coke furnace; Said coke pushing is the term of coking industry constantly, just carbonization chamber, the hole time point of coke pushing of coming out of the stove.For example: the 12:00 coke pushing of 51# carbonization chamber, 12:00 is exactly its coke pushing moment.

Wherein: as shown in drawings, the fire of going into the stove coal falls to constantly being meant that coking coal fire takes place falls moment of phenomenon, when judging, phenomenon that said fire is fallen to install at coke furnace carbonization chamber tedge 1 place in order to observe the viewport of raw gas 3 colors in the coke oven, so that the fire phenomenon that falls is judged, viewport is apart from least 400 millimeters on furnace roof, and this viewport place is inclined upwardly a connecting pipe 2 that has lid is being set.

As shown in drawings, the caliber of connecting pipe 2 is below DN80; Lid and hole seat all should have certain composition surface, and guarantee good seal; Connecting pipe 2 and tedge angle at 45, length is selected to make things convenient for the observer to be operating as condition.

Go into the later stage of stove coal in destructive distillation, can occur a kind of we be defined as the objective phenomenon of " fire falls ".When following feature occurs, with regard to the charge of coke " fire falls " of this carbonization chamber of decidable:

(1) temperature of charge of coke each point is relatively more consistent, all reaches about 900～950 ℃;

(2) color of raw gas becomes blue white by yellow;

(3) flame after the raw gas burning is transparent rice yellow;

(4) CH4 sharply reduces in the component of raw gas, and H2 increases sharply;

(5) calorific value of raw gas obviously reduces;

(6) back of rising significantly sharply descends raw gas temperature regular hour before fire falls.

The decision method that fire falls:

Utilize fall in six features of phenomenon any one of above-mentioned fire, all can drop into row and judge fire.Using more convenient is the 2nd, 3,6 features.

1, judges that according to the color of raw gas fire falls;

Carry out fire when falling to judging, take off lid a spot of raw gas of overflowing, with the naked eye observe the raw gas change in color by connecting pipe 2.Before fire fell, the color of raw gas was thin out gradually by dense yellow; Fire falls behind, and the color of raw gas is blue white.We are transformed into blue white being decided to be in a flash " fire falls constantly " with the color of raw gas by yellow.

2, judge that according to the raw gas burned flame fire falls;

At night and can't see the color of raw gas clearly the time, also the raw gas 3 in the tedge 1 can be ignited, the flame color when observing the raw gas burning by connecting pipe 2, flame transfers the moment of transparent rice yellow to, promptly is " fire falls constantly ".

3, judge that according to the temperature of raw gas fire falls;

The a certain position (as the center of tedge vertical tube or bridge tube) of deriving equipment at the carbonization chamber raw gas is provided with a thermopair, is used to measure the temperature of raw gas.The temperature of raw gas all can occur clocklike changing in each coking cycle, utilized thermopair, can detect the moment that peak appears in the raw gas temperature.Here the raw gas temperature of being said is meant that raw gas leaves carbonization chamber later on to being cooled off temperature before by ammoniacal liquor.Occurring the phenomenon that the raw gas temperature sharply descends before fire falls, mainly is because the generating capacity of raw gas sharply reduces, due to promptly heat transfer medium sharply reduces.

Claims (1)

1. method for determining standard temperature of stamp-charging coke oven, it is characterized in that this method is to guarantee that coke falls constantly to coke pushing 1-1.5 hour putting the time arranged between the two constantly at its fire, coke just maturation be foundation, if the time of putting is less than 1 hour, illustrate that the coke oven standard temperature is low calmly; If the time of putting was longer than 1.5 hours, illustrate that the coke oven standard temperature is fixed high; With this, improve constantly or reduce the coke oven standard temperature, thereby finally determine the standard temperature of tamping coke furnace;

Wherein: the fire of going into the stove coal falls to constantly being meant that coking coal fire takes place falls moment of phenomenon, when judging, phenomenon that said fire is fallen to install at coke furnace carbonization chamber tedge place in order to observe the viewport of raw gas color in the coke oven, so that the fire phenomenon that falls is judged, viewport is apart from least 400 millimeters on furnace roof, and this viewport place is inclined upwardly a connecting pipe that has lid is being set.

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