Improvements to the packing seal system. For the defects and problems of the piston rod packing sealing system, the improvement is as follows: (1) The packing structure is improved. The sealing ring is changed from a straight cistern with three lobes to a slanting incision with a radial direction of 60°. This facilitates the automatic tightening compensation of the sealing ring after the inner diameter of the packing sealing ring is worn, thereby achieving the purpose of prolonging the life of the packing; 2) Insert nitrogen into the sealed cavity of the outermost set of sealing ring of the stuffing box to form a nitrogen seal, so as to achieve pressure balance inside and outside the stuffing box and effectively prevent leakage of liquefied gas; (3) Two compartments of the cylinder isolation layer The leakage discharge port is discharged separately, the oil and gas discharge port on the crankcase side is directly discharged to the high-altitude atmosphere, and the gas leakage on the cylinder side is discharged to the low-pressure pipe network to avoid mutual enthalpy; (4) The high-level discharge port on the cylinder side is collected by the low-pressure gas recovery pipe network of the main plant. Change to the liquefied gas low temperature storage facility accident special torch (the torch under normal conditions, the pipe network gas pressure is close to zero), in order to facilitate the smooth flow of the leaking gas.
The successful improvement of the reciprocating compressor packing sealing system not only solves the safety hazards that have long plagued us, but also produces good economic benefits and social environmental benefits. At the beginning of the plant's commissioning, the unit was running stably. After the plant capacity was increased from 1.2 million t/year to 2 million t/year in 1994, the unit operation was very unstable and many unplanned shutdowns occurred. There are two main reasons: First, the unit vibration is large; second, the floating ring seal is invalid. After analysis, due to the change of process composition and condition after the modification, it contains more ammonium salt and domestic catalyst dust, and the original structure type floating ring is easy to accumulate ammonium salt and is interfered by dust, which causes the floating ring to be unstable and The seal failed.
Seed Grain Processing Equipment
We are the specialized and top manufacturers in China and We offer full set Seed Processing Line solution. Whole Seed Cleaning Plant is from Pre-cleaning, Fine cleaning, Destining, Gravityseparating, Beans polishing,Seed coating, Last seed weighing and packing.
The Seed Cleaning & Processing Line is composed of several single machines. Base on different grain type and processing grain, we will suggest appropriate grain cleaning machines. These grain cleaning machines arecollocated freely. Between each machines, there are Bucket Elevator , Inclined Evator or other conveying equipment to link up.
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Seed Processing Line installationeffect and introduction.
This Grain Cleaning & Processing Plant iscomposed of 5XZC-5DX Seed Cleaner & Grader, 5XZ-5 Gravity Separator, DTY Bucket Elevator, 5BYX-5 Seed Coating Machine, and HLD-50 Bagging Scale System.
Working flow: The seeds arefed into 5XZC-5DX Seed Cleaner &grader first. Seed cleaner & grader will remove the dust, lightimpurity, oversize and undersize impurity before seed flow into 5XZ-5 gravity separator. During seeds cleaned by Gravity Separator, the seeds are separated by density difference. Thepartially eaten seeds, immature seeds, insect damaged seed, sick seeds, moldyseeds are separated from good healthy seeds. Then seeds go on being lifted by DTY Bucket Elevator, falling into the 5BYX-5 Seed Coating Machine. During the seed coating procedure, the chemical,fertilizer or other protective liquidity will be coated to seeds' surface andimprove seeds' germination rate. Finally seeds being transferred to Weighing Scale . Seeds will be weightedand packed to bags ready for sell.
Seed Grain Processing Equipment
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Hebei HELIDA Grain Selecting Machinery Technology Co., Ltd. , http://www.grainseedscleaner.com