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1. Existing problems.
In the top of the boiling furnace, the bricks fell off; the upper bricks collapsed; the embedded flanges were burned out; the furnace door burned out and the bricks fell off; the fire blocking effect was poor; The material is burned at the feed inlet and there is a serious safety hazard.
2. Technological transformation measures.
1 To extend the service life of the west wall of the boiling furnace, the west wall of the drying boiler was thickened from the original 750mm to 1050mm, under the new wall to support the steel structure, thereby increasing its strength and bearing capacity. Prefabricating the upper part of the flange of the boiling furnace to increase the bearing capacity of the wall, protect the embedded flange, prolong the service life of the embedded flange, and increase the thermal efficiency. At the same time, the thickness of the steel plate of the embedded flange is increased from 8mm to 20mm.
2 Replace the inlet and the flange of the dryer. The width of the flange is changed from 710mm of the original design to 1050mm. The inside of the flange is built entirely to increase the load and protect the dryer barrel, thus reducing the pressure of the embedded flange. , to extend its service life.
3 Replace the boiling furnace door and lower coal pipe, make a broom in the upper part of the furnace door, extend the service life of the door, and make the steel structure support, increase the two-room slag sluice, and add the ash churn at the embedded flange. Reduce material wear on the barrel of the dryer, so that the two chambers can be discharged in time.
4 Replace the dryer inlet chute, and move it westward to reduce the angle of the chute into the dryer, thereby shortening the length of the chute, to avoid burning the flame directly and prolonging the service life.
The smoothness of the cutting chute directly affects the output of the dryer table. The connection of the cutting chute is changed from flanged to bolted, increasing the diameter of the blanking lap and increasing the thickness of the steel plate from 8 mm to 16 mm. , Changing the cutting chute from the original 300mm×400mm to 500mm×450mm not only prolongs the service life of the feeding chute, but also solves the problem of frequent chewing of the original chute, and significantly increases the output of the station and increases the patency of the material. .
3. The transformation effect.
Through the above-mentioned reconstruction, after nearly 3 months of operation, the continuous operation rate of the dryer was improved, and the production time at the station was increased from 40 tons to 60 tons, which ensured the need for cement grinding production for slag, and the transformation was very successful.
The drying process of the 2,500-ton clinker production line of Nissan which was put into production in the rotary kiln factory of Shandong Dezhou Dam Co., Ltd. in August 2003, was responsible for the slag drying of the two mills. It has been put into production for two years and has undergone many Maintenance can basically meet normal production. In October 2005, after the company's second-line cement grinding trial production, the slag drying capacity could not meet the production needs, there are serious boiling furnace damage, thermal efficiency and poor efficiency, not only difficult to guarantee the Taiwan production and operating rate, and there are serious security risks. Constrained cement production.