Summary of the invention
In view of this, the purpose of this invention is to provide a kind of oven-drying working process for coke dry quenching system, can prevent that at the warm air drying stage boiler systems from trembling, avoid damage in boilers the slit to occur and make steam sneak into the oven dry air, cause can't be promptly and accurately the dried oven dry situation of putting out stove of judgement; And in the coal gas baking stage, accurately control the proportioning of coke-oven gas and air, and avoid flame-out, the dried oven refractory that puts out of coal gas baking stage to heat up not according to intensification transformation of crystal curve, cause refractory materials to break or damage.The concrete scheme of this technique is:
Oven-drying working process for coke dry quenching system of the present invention may further comprise the steps:
Step 1, the dried stove that puts out of warm air oven dry,
Step 2, after step 1 finishes, carry out the dried stove that puts out of coal gas oven dry,
Step 3, after step 2 finishes, put out red Jiao that packs in the stove and make refractory materials be warming up to 950-1050 ℃ with the speed of≤30 ℃/h to dried, finish the baker operation, in this process continuously to dried put out pass in the stove nitrogen with stove in inflammable gas cement out, the refractory materials heat-up rate is less in this step, can guarantee that more refractory materials is not damaged and breaks, but baker is consuming time longer, allowing heat-up rate in the temperature-rise period is 0 state, be keeping warm mode, and the heat-up rate of different time sections can change in the whole temperature-rise period;
Described step 1 comprises following operation:
A, air is passed into boiler, boiler utilizes low-pressure steam that air is heated, and before the work of boiler airlift pump, makes the boiler header water temperature reach consistent with the drum temperature by the boiler evaporator continuous blowdown;
B, will dry it from the boiler dried stove that puts out of warm air input out, until till the dried moisture that puts out in the oven refractory all separated out, the dried stove chamber pressure that prestores that puts out is controlled at 55-65Pa in the drying course;
Described step 2 comprises following operation:
I, coal gas and air are mixed into air mixture for 1:5 by volume, air mixture is passed into the dried stove burning of putting out, make the dried oven refractory that puts out with the speed intensification of≤3.3 ℃/h, until furnace temperature rises to till 790-810 ℃, the refractory materials heat-up rate is less in this operation, can guarantee that more refractory materials is not damaged and breaks, but baker is consuming time longer, allowing heat-up rate in the temperature-rise period is 0 state, be keeping warm mode, and the heat-up rate of different time sections can change in the whole temperature-rise period.
Further, behind described operation b, also be provided with operation c: the dried stove air input cleaning apparatus out that puts out is carried out dust removal process, will enter atmosphere through the air of dust removal process;
Further, among the described operation b, the dried oven refractory speed with 10 ℃/h in by the hot air dries process of putting out heats up;
Further, after the operation I, also be provided with the operation II: will enter atmosphere from the dried waste gas part of discharging the stove of putting out after the burning in the operation I, another part is sent into boiler through the first time after the dust removal process to be heated, to carrying out the dust removal process second time from boiler this part gas out, will through the second time dust removal process gas input the dried stove that puts out with the air mixture described in the operation I.
Beneficial effect of the present invention: oven-drying working process for coke dry quenching system of the present invention, in the warm air drying course, the temperature of boiler header and drum is consistent, avoid airlift pump when work boiler to tremble and produced the gap, Boiler Steam can not sneaked into the oven dry air, thereby can accurately and timely judge the dried dried situation of bake oven of putting out; At the coal gas baking stage, by rational control coal gas air proportioning and heat-up rate, refractory materials is heated up according to intensification transformation of crystal curve, avoided that air mixture is flame-out, refractory materials breaks or the situation such as damage; Thereby this technique can prolong dried work-ing life of putting out oven refractory, guarantees the boiler systems trouble-free service and prolongs its work-ing life, can shorten the oven-drying working time simultaneously.
Embodiment
Fig. 1 is oven-drying working process for coke dry quenching system warm air baker flow chart of steps of the present invention; Fig. 2 is oven-drying working process for coke dry quenching system coal gas baker flow chart of steps of the present invention.
Embodiment one: as shown in the figure, oven-drying working process for coke dry quenching system may further comprise the steps:
Step 1, the dried stove that puts out of warm air oven dry,
Step 2, after step 1 finishes, carry out the dried stove that puts out of coal gas oven dry,
Step 3, after step 2 finishes, put out red Jiao that packs in the stove and make refractory materials be warming up to 1050 ℃ with 30 ℃/h speed to dried, finish the baker operation, in this process continuously to dried put out pass in the stove nitrogen with stove in inflammable gas cement out, inflammable gas is cemented out can avoid inflammable gas to gather the danger of blasting; Drop into red Jiao the dried stove that puts out is heated up, can to the dried stove test data before the formula work of becoming a full member of putting out, guarantee that the dried stove life's work that puts out carries out smoothly; Certainly in implementation, the refractory materials heat-up rate can also be other value in<30 ℃/h scope in this step, the refractory materials outlet temperature also can be other values in 950-1050 ℃ of scopes, and allowing heat-up rate in the temperature-rise period is 0 state, be keeping warm mode, and the heat-up rate of different time sections can change in the whole temperature-rise period; Dried in implementation to put out the oven refractory heat-up rate less, can guarantee that more refractory materials is not damaged and breaks, but baker is consuming time longer, is unfavorable in time entering the normal production phase.Refractory materials heats up with 30 ℃/h speed and can both guarantee that refractory materials can not damage and break in this step, can also guarantee that the dried oven refractory that puts out reaches dried temperature when putting out stove and becoming a full member normal production with the shortest time.In this operation dried put out oven refractory reach with different heat-up rates processing requirement the temperature embodiment will be in the subsequent embodiment illustrated.
Described step 1 comprises following operation:
A, air is passed into boiler, boiler utilizes low-pressure steam that air is heated, and before the work of boiler airlift pump, make the boiler header water temperature reach consistent with the drum temperature by the boiler evaporator continuous blowdown, the temperature of boiler header and drum is consistent, avoided airlift pump when work boiler to tremble and produce the gap, Boiler Steam can not sneaked into the oven dry air, thereby can accurately and timely judge the dried dried situation of bake oven of putting out;
B, will dry it from the boiler dried stove that puts out of warm air input out, until till the dried moisture that puts out in the oven refractory all separated out, the dried stove chamber pressure that prestores that puts out is controlled at 55-65Pa in the drying course, in the drying course the dried stove chamber pressure fluctuation range that prestores of putting out is controlled at 55-65Pa, can guarantee the dried oven refractory heat-up rate equilibrium of putting out, avoid damaging refractory materials;
Described step 2 comprises following operation:
I, with coal gas and air by volume for 1:5 is mixed into air mixture, air mixture is passed into the dried stove burning of putting out, the dried oven refractory that puts out is heated up, until furnace temperature rises to till 810 ℃ with the speed of 3.3 ℃/h; By rational control coal gas air proportioning and heat-up rate, refractory materials is heated up according to intensification transformation of crystal curve, avoided that air mixture is flame-out, refractory materials breaks or the situation such as damage.Certainly in implementation, the refractory materials heat-up rate can also be other value in<3.3 ℃/h scope in this step, the refractory materials outlet temperature also can be other values in 790-810 ℃ of scopes, and allowing heat-up rate in the temperature-rise period is 0 state, be keeping warm mode, and the heat-up rate of different time sections can change in the whole temperature-rise period; Dried in implementation to put out the oven refractory heat-up rate less, can guarantee that more refractory materials is not damaged and breaks, but baker is consuming time longer, is unfavorable in time entering the normal production phase.Refractory materials heats up with 3.3 ℃/h speed and can both guarantee that refractory materials can not damage and break in this step, can also guarantee the dried oven refractory that puts out with the shortest time completing steps 2, is conducive to the dried stove that puts out and in time changes normal production over to.In this operation dried put out oven refractory reaches the temperature of processing requirement with different heat-up rates embodiment will be in the subsequent embodiment illustrated.
Adopt this technique can prolong dried work-ing life of putting out oven refractory, guarantee the boiler systems trouble-free service and prolong its work-ing life, can shorten the oven-drying working time simultaneously.
As the improvement to the present embodiment, behind described operation b, also be provided with operation c: the dried stove air input cleaning apparatus out that puts out is carried out dust removal process, to enter atmosphere through the air of dust removal process, this operation can be removed from the dried stove airborne dust out that puts out, and avoids atmosphere is polluted.
As the improvement to the present embodiment, among the described operation b, the dried oven refractory that puts out heats up with the speed of 10 ℃/h in by the hot air dries process, both can obtain faster drying efficiency, can guarantee that refractory materials does not break and damages simultaneously.
As the improvement to the present embodiment, after the operation I, also be provided with the operation II: will enter atmosphere from the dried waste gas part of discharging the stove of putting out after the burning in the operation I, another part is sent into boiler through the first time after the dust removal process to be heated, to carrying out the dust removal process second time from boiler this part gas out, will through the second time dust removal process gas input the dried stove that puts out with the air mixture described in the operation I; This operation has reclaimed that part is dried puts out the waste gas that fire grate goes out, utilize the heat energy of waste gas the more dried stove that puts out to be dried, can save a large amount of coal gas, be conducive to reduce the oven dry cost, and the waste gas to recycling has carried out dust removal process, can remove the dried dust that puts out in the stove, and can avoid dust that boiler is caused damage.
Embodiment two: as shown in the figure, oven-drying working process for coke dry quenching system may further comprise the steps:
Step 1, the dried stove that puts out of warm air oven dry,
Step 2, after step 1 finishes, carry out the dried stove that puts out of coal gas oven dry,
Step 3, after step 2 finishes, put out red Jiao that packs in the stove and make refractory materials be warming up to 1000 ℃ with 25 ℃/h speed to dried, finish the baker operation, in this process continuously to dried put out pass in the stove nitrogen with stove in inflammable gas cement out, inflammable gas is cemented out can avoid inflammable gas to gather the danger of blasting; Drop into red Jiao the dried stove that puts out is heated up, can to the dried stove test data before the formula work of becoming a full member of putting out, guarantee that the dried stove life's work that puts out carries out smoothly;
Described step 1 comprises following operation:
A, air is passed into boiler, boiler utilizes low-pressure steam that air is heated, and before the work of boiler airlift pump, make the boiler header water temperature reach consistent with the drum temperature by the boiler evaporator continuous blowdown, the temperature of boiler header and drum is consistent, avoided airlift pump when work boiler to tremble and produce the gap, Boiler Steam can not sneaked into the oven dry air, thereby can accurately and timely judge the dried dried situation of bake oven of putting out;
B, will dry it from the boiler dried stove that puts out of warm air input out, until till the dried moisture that puts out in the oven refractory all separated out, the dried stove chamber pressure that prestores that puts out is controlled at 55-65Pa in the drying course, in the drying course the dried stove chamber pressure fluctuation range that prestores of putting out is controlled at 55-65Pa, can guarantee the dried oven refractory heat-up rate equilibrium of putting out, avoid damaging refractory materials;
Described step 2 comprises following operation:
I, with coal gas and air by volume for 1:5 is mixed into air mixture, air mixture is passed into the dried stove burning of putting out, the dried oven refractory that puts out is heated up, until furnace temperature rises to till 800 ℃ with the speed of 2.5 ℃/h; By rational control coal gas air proportioning and heat-up rate, refractory materials is heated up according to intensification transformation of crystal curve, avoided that air mixture is flame-out, refractory materials breaks or the situation such as damage.
Adopt this technique can prolong dried work-ing life of putting out oven refractory, guarantee the boiler systems trouble-free service and prolong its work-ing life, can shorten the oven-drying working time simultaneously.
As the improvement to the present embodiment, behind described operation b, also be provided with operation c: the dried stove air input cleaning apparatus out that puts out is carried out dust removal process, to enter atmosphere through the air of dust removal process, this operation can be removed from the dried stove airborne dust out that puts out, and avoids atmosphere is polluted.
As the improvement to the present embodiment, among the described operation b, the dried oven refractory that puts out heats up with the speed of 10 ℃/h in by the hot air dries process, both can obtain faster drying efficiency, can guarantee that refractory materials does not break and damages simultaneously.
As the improvement to the present embodiment, after the operation I, also be provided with the operation II: will enter atmosphere from the dried waste gas part of discharging the stove of putting out after the burning in the operation I, another part is sent into boiler through the first time after the dust removal process to be heated, to carrying out the dust removal process second time from boiler this part gas out, will through the second time dust removal process gas input the dried stove that puts out with the air mixture described in the operation I; This operation has reclaimed that part is dried puts out the waste gas that fire grate goes out, utilize the heat energy of waste gas the more dried stove that puts out to be dried, can save a large amount of coal gas, be conducive to reduce the oven dry cost, and the waste gas to recycling has carried out dust removal process, can remove the dried dust that puts out in the stove, and can avoid dust that boiler is caused damage.
Embodiment three: as shown in the figure, oven-drying working process for coke dry quenching system may further comprise the steps:
Step 1, the dried stove that puts out of warm air oven dry,
Step 2, after step 1 finishes, carry out the dried stove that puts out of coal gas oven dry,
Step 3, after step 2 finishes, put out red Jiao that packs in the stove and make refractory materials be warming up to 950 ℃ with 20 ℃/h speed to dried, finish the baker operation, in this process continuously to dried put out pass in the stove nitrogen with stove in inflammable gas cement out, inflammable gas is cemented out can avoid inflammable gas to gather the danger of blasting; Drop into red Jiao the dried stove that puts out is heated up, can to the dried stove test data before the formula work of becoming a full member of putting out, guarantee that the dried stove life's work that puts out carries out smoothly;
Described step 1 comprises following operation:
A, air is passed into boiler, boiler utilizes low-pressure steam that air is heated, and before the work of boiler airlift pump, make the boiler header water temperature reach consistent with the drum temperature by the boiler evaporator continuous blowdown, the temperature of boiler header and drum is consistent, avoided airlift pump when work boiler to tremble and produce the gap, Boiler Steam can not sneaked into the oven dry air, thereby can accurately and timely judge the dried dried situation of bake oven of putting out;
B, will dry it from the boiler dried stove that puts out of warm air input out, until till the dried moisture that puts out in the oven refractory all separated out, the dried stove chamber pressure that prestores that puts out is controlled at 65Pa in the drying course, in the drying course the dried stove chamber pressure fluctuation range that prestores of putting out is controlled at 55-65Pa, can guarantee the dried oven refractory heat-up rate equilibrium of putting out, avoid damaging refractory materials;
Described step 2 comprises following operation:
I, with coal gas and air by volume for 1:5 is mixed into air mixture, air mixture is passed into the dried stove burning of putting out, the dried oven refractory that puts out is heated up, until furnace temperature rises to till 790 ℃ with the speed of 2 ℃/h; By rational control coal gas air proportioning and heat-up rate, refractory materials is heated up according to intensification transformation of crystal curve, avoided that air mixture is flame-out, refractory materials breaks or the situation such as damage.
Adopt this technique can prolong dried work-ing life of putting out oven refractory, guarantee the boiler systems trouble-free service and prolong its work-ing life, can shorten the oven-drying working time simultaneously.
As the improvement to the present embodiment, behind described operation b, also be provided with operation c: the dried stove air input cleaning apparatus out that puts out is carried out dust removal process, to enter atmosphere through the air of dust removal process, this operation can be removed from the dried stove airborne dust out that puts out, and avoids atmosphere is polluted.
As the improvement to the present embodiment, among the described operation b, the dried oven refractory that puts out heats up with the speed of 10 ℃/h in by the hot air dries process, both can obtain faster drying efficiency, can guarantee that refractory materials does not break and damages simultaneously.
As the improvement to the present embodiment, after the operation I, also be provided with the operation II: will enter atmosphere from the dried waste gas part of discharging the stove of putting out after the burning in the operation I, another part is sent into boiler through the first time after the dust removal process to be heated, to carrying out the dust removal process second time from boiler this part gas out, will through the second time dust removal process gas input the dried stove that puts out with the air mixture described in the operation I; This operation has reclaimed that part is dried puts out the waste gas that fire grate goes out, utilize the heat energy of waste gas the more dried stove that puts out to be dried, can save a large amount of coal gas, be conducive to reduce the oven dry cost, and the waste gas to recycling has carried out dust removal process, can remove the dried dust that puts out in the stove, and can avoid dust that boiler is caused damage.
Embodiment four: the difference of the present embodiment oven-drying working process for coke dry quenching system and embodiment 1 only is: 1, in the operation I of described step 2, the dried oven refractory that puts out is to heat up with the speed of 1.5 ℃/h, until furnace temperature rises to 800 ℃; 2, in step 3, the dried oven refractory that puts out is to be warming up to 1000 ℃ with 15 ℃/h speed.
Embodiment five: the difference of the present embodiment oven-drying working process for coke dry quenching system and embodiment 1 only is: 1, in the operation I of described step 2, the dried oven refractory that puts out is to heat up with the speed of 1 ℃/h, until furnace temperature rises to 805 ℃; 2, in step 3, the dried oven refractory that puts out is to be warming up to 1020 ℃ with 10 ℃/h speed.
Embodiment six: the difference of the present embodiment oven-drying working process for coke dry quenching system and embodiment 1 only is: 1, in the operation I of described step 2, the dried oven refractory that puts out is to heat up with the speed of 0.5 ℃/h, until furnace temperature rises to 800 ℃; 2, in step 3, the dried oven refractory that puts out is to be warming up to 970 ℃ with 5 ℃/h speed.
Embodiment seven: the difference of the present embodiment oven-drying working process for coke dry quenching system and embodiment 1 only is: 1, in the operation I of described step 2, the dried oven refractory that puts out is to heat up with the speed of 0.3 ℃/h, until furnace temperature rises to 795 ℃; 2, in step 3, the dried oven refractory that puts out is to be warming up to 1050 ℃ with 3 ℃/h speed.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.