Jinling Petrochemical Coal Hydrogen Plant High Load Operation
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Due to the advantages of production costs, Jinling Petrochemical Company's “coal hydrogen production†meets its own refining deep processing needs, and it is also supplied to Yangzi Petrochemical Company's production facilities on the northern bank of the Yangtze River in the Nanjing area through cross-river pipelines. For the two companies to deal with international crude oil prices, improve the proportion of inferior crude oil blending, reduce production costs to create favorable conditions.
This year's rise in international oil prices has triggered a "lack of prices for goods" in domestic coal supply. The fluctuation in the quality of raw coal has brought greater difficulties to the normal operation of the equipment. Under normal circumstances, the coal ash content for coal-fired hydrogen plants should be less than 15%. This year, the plant raw coal ash content is high, reaching 23% at the highest, which is an unprecedented test for the installation.
Faced with a series of new problems such as the failure of the storage and transportation system, the temperature rise of the turbine air-supply thrust turbine, and the corrosion and leakage of the purification system equipment, the company’s chemical fertilizer workshop has formulated a timely response plan: 24 hours for important equipment. Special protection, timely repairs; data fluctuations in raw material storage and transportation systems, timely analysis of reasons, adjustment of process parameters, increase the conversion rate of raw materials; at the same time increase the management of the team, carry out “five to five fightsâ€, increase the “team building awardâ€, Mobilize the enthusiasm of the employees on the spot, reduce the risk of spot leakage, and reduce the unit hydrogen consumption and fresh water consumption. In this way, the high-load smooth production of the hydrogen production plant can be realized. As of October 30, the total annual safety operation of the plant was 267.66 days. Accumulated production of hydrogen was 55,600 tons and nitrogen was 63,000 tons.
In view of the large change in the amount of external hydrogen used, the company strengthened the maintenance of the original synthetic ammonia and urea plant equipment, and renewed and renovated some of the aging equipment, so that these old facilities reached the “open and close, stop and stop†Requirements, at any time to digest excess hydrogen, to maximize the "coal hydrogen production".
In September and October of this year, due to the maintenance of hydrogen production facilities, the amount of hydrogen supply outside the company decreased. In the face of this change, the company started construction of ammonia and urea plants at an appropriate time and increased urea production. At the same time, it actively organized marketing of chemical fertilizer products. Under the trend of decreasing fertilizer prices, efforts were made to reduce inventory and ensure low-cost “coal hydrogen productionâ€. Use it all. So far, the company has used its surplus “coal hydrogen production†to produce 47,700 tons of synthetic ammonia and 79,800 tons of urea, which has allowed the once-disappearing Maple Leaf brand of urea to return to the local market, improving the company’s overall efficiency.