Pay close attention to the key device process optimization Nanjing Chemical annual consumption over 100 million

Synthetic ammonia coal consumption and cyclohexanone benzene consumption all set a record high. The chlor-alkali plant achieved unplanned shutdown for the first time for the first time... In 2012, Nanjing Chemical Industry Co., Ltd. paid close attention to the optimization of key equipment and BenQ chemical production decreased by 1.07 year-on-year. 100 million yuan.

See more carefully The three-story rod mill roared the coal and "chewed" it into pieces. The thick black coal slurry ran through the tumbler and leaked into the tank. At 10 o'clock on the morning of January 11, the three-shift leader of the ammonia plant gasification system of the company, Tang Yongtong, stood in front of a misty coal sifter screen and pointed to the five ribs visible in the screen, saying: "Coal The slurry flow is leaked between the 3rd and 4th lanes, and the concentration and viscosity are just right." As an auxiliary method for coal slurry quality control, this is the experience they have observed for many years. “The normal situation is observed once an hour. Every time the coal is wet or the additive pump is not operating properly, the frequency must be increased.” The segment devoted a small-scale contest on coal slurry quality throughout the year. Gu Weimin’s team of security guards won the last year’s quality first.

“We started from the quality control of coal slurry and realized the whole process of reducing consumption.” The person in charge of the company's production system introduced that the ammonia synthesis technicians repeatedly optimized and drastically shortened the driving time and reduced the consumption of the driving process; The “bottleneck” in the section, they organized technical research, the system of feeding amount, the daily output of synthetic ammonia steadily increased; production and maintenance cooperation, jointly solve the problem of stable operation of the key unit, so that the past long unused K401 compressor group actually run for 225 days A total of 3,375 tons of synthetic ammonia was recovered throughout the year.

"We want to be more comprehensive." The dehydrogenation conversion rate was once low, and we conducted two kinds of working conditions under the premise of ensuring the stable operation of the device. We found that the amount of feed can increase the output by 15 tons in this interval, and the effect of reducing consumption is obvious... In the fourth quarter of 2012, key equipment such as cyclohexanone will hold a workshop on stable production and consumption reduction attended by leaders of the company every day at 4:30 pm to solve various problems affecting consumption. This “cost reduction and fee reduction protection benefit” The specific measures have been extended so far. In 2012, the company’s consumption of cyclohexanone benzene decreased by 11.8 kg/ton compared to the same period last year, and the cost was reduced by 5.7 million yuan.

“We optimized the operation of the alkali separation system to ensure the long-term stable operation of the alkane distillation system; use the system to eliminate the cooking tower and improve the heat transfer efficiency; implemented the oil-conducting system 'oil to gas' to reduce costs...” Cheng Yafei, the relevant person in charge of the benzene chemical industry department, introduced the positive efforts made in reducing consumption of cyclohexanone, from the optimization of the decomposition process to the transformation of refrigeration technology; from reducing light oil and X oil to strictly controlling the circulating hydrogen concentration, from improving the dehydrogenation conversion rate To improve the efficiency of waste water stripping, each link finds gaps, measures, and potentials. “The ketone-alcohol ratio has increased, X oil has essentially no cyclohexanol, and the hydrogenation unit has no odor, and the COD content of wastewater has also dropped by 75%.”

Doing more standard "1,2,3,4,5..." At noon on January 11, the company's chlorinated benzene plant operator Lu Xiaoyong wearing protective clothing and holding 2" in the bottom of the chlorinator On the top, the valve is gently and evenly opened, counted softly, closed, then opened, and so on, until the clear material is visible in the sight glass. He said: "I waste acid, the action of the on/off valve directly relates to the temperature stability in the chlorinator. If not, it will stop the upstream caustic soda device." There are three raw material inlet pipes at the bottom of the chlorinator. It will affect the feeding amount, causing the middle temperature to squat. If the long-term temperature is too high, it will cause the bottom to coke.

“We have worked together to achieve zero unplanned work stoppages.” Lu Xiaoyong, who has had 10 years of experience, came from the military camp. In 2007, he transferred to the chlorinated benzene plant. “A lot of my colleagues are transferred to posts. I am a party member and I have to take my studies.” Not only did he learn about the operation of the chlorination station, but he also learned the skills of distillation and post-production jobs. When the chlorinator drains acid, it opens the valve for 5 seconds and closes the valve for 2 seconds. This way, he and his colleagues summed it up. "I practiced counting seconds when I was in the army. The error in 1 minute would not exceed 1 second."

In 2013, the company had adopted the best historical level of equipment consumption as an assessment indicator, and a new round of reduction in consumption has been launched.