5000t d NSP kiln production practice of burning l

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5000t / d NSP kiln production practice of burning low quality coal

, Mineral flux reduction, although easy to reduce the clinker burning, but does not reduce the use of low quality coal in the kiln for heat and cooling by replacing the burner unit transformation,[link widoczny dla zalogowanych], the sintering temperature with a guaranteed, fully capable, as long as Gui rate value, however high, will not have shifting sand materials,[link widoczny dla zalogowanych], especially high-acid ratio can reduce the kiln ring formation, to improve clinker strength; Third, the saturation ratio, high silica ratio in the case, not only meet the requirements of the quality of clinker. The clinker burnability moderate, and due to lower carbonate content, reducing the pressure of calciner beneficial to help reduce the temperature of preheater system (4) kiln ID fan ventilation capacity constraints, under the present situation, we reduce the heater air temperature, clogging the system leakage, clean the kiln flue crust ramp up to meet three needs proper ventilation. Reduce the heater air temperature, mainly by achieving the three high-temperature exhaust gas to promote wind and kiln calciner coal combustion rate, reduce the burning of pulverized coal preheater people. And stressed the kiln ventilation and feeding match, play a large volume of large-scale calciner sprayed advantage. Extend the residence time of coal in the furnace. Practice shows that the excellent results of these minor adjustments, C level tube exit temperature dropped to 353cc, very good ventilation system, and to stem the leakage. (5) kiln unloading ramp, up the flue and calciner cone casting material with anti-crust. Reduce the crust. Poke at key locations expected to open in time with the high-pressure water cleaning hole crust, high-pressure water jets of water sprayed into the hot material in the crust. Moment a large amount of water vapor, resulting in expansion of blasting, the crust material spallation collapse. (6) the use of low-grade coal mines in the stability of the process is relatively weaker condition, laboratory raw ingredients and kiln operation in the control room closely with the poor conditions in the kiln a short period of time to adjust ingredients to improve burnability, improve clinker Results grain, to promote recycling hot two or three times the air in order to promote the improvement of the status of the kiln, then kiln conditions to adapt better the ingredients more difficult to burn the program to achieve a better overall effect of long-term operation of a kiln 58, a Zheng Guilin. Such as: 5000t / d NSP kiln burning low quality coal production practice (7) Timely processing kiln ring formation. Results lap time is short,[link widoczny dla zalogowanych], little effect on the kiln conditions. Once the kiln ring formation, we generally use the hot and cold alternating method,[link widoczny dla zalogowanych], which stopped short 10min calciner feed coal, and then immediately fed sufficient quantities of coal, so hot and cold repeated several times, ring formation that is able to collapse. Or by firing a long time low temperature, but also can more effectively deal with ring formation. ( Cool

to control coal fineness and improve the speed of pulverized coal combustion. We have coal, the static pre-separator for the dynamic transformation of the powder, coal fineness can better control the fineness goals: R �� r% / (2 ~ 1.0). Practice has proved that the speed greatly improved combustion of coal, burning low quality coal to weaken the disadvantages of slow. (9) actively adjust the appropriate operating parameters of the kiln, the thermal stability of the system. Overall system temperature control than when using the higher quality coal, the target value of kiln temperature 1100oC, kiln hood air temperature 950oC, three air temperature 860oC, calciner out VI900oC, C-level tube at the top of 910oC, C-level tube exit 353oC4 now operation from the end of May 2004 to take these technical measures, the production improved. System is stable, kiln clinker production of 5600t / d. (1) decomposition combustion status changed for the better, the VI temperature up to 900oC, C-level tube out VI910oC, C level below the bottom of the upper barrel temperature, the temperature inversion phenomenon solution, c-level VI barrel out to about 353oC. (2) kiln ID fan limited ability into full play, improve the ventilation kiln, secondary air temperature up to 920oC or more, three air temperature reaches 850oC, strong fire kiln, clinker end grain is better, a clinker plant weight indicators liters CaO and good strength of 57.5MPa clinker than 28d. (3) The secondary air temperature increase, together with OCUS four coal burner duct flexible regulation Kiln flame shape and intensity to ensure that,[link widoczny dla zalogowanych], together with ash and raw materials and ingredients to track with, by the end of May to 8 skin conditions since the end of the kiln is relatively stable. 5 Conclusion At present, China has built and under construction 5000t / d above the pre-decomposition of large number of dry kilns, if extensive use of low quality coal production can not only reduce production costs, but also can save the limited coal resources, coal resources to achieve national optimize the use of integrated, access to good social and economic benefits. Practice proved that my company, low quality coal in large pre-decomposition of new dry kiln can be applied well, the key is to try to improve the cooling efficiency of heat recovery unit to promote the rate of coal combustion kiln, furnace system to ensure there is sufficient ventilation. Rear Engineering