“Small nitrogen fertilizer enterprises can reduce the negative impact of falling product prices and rising raw material prices on production and operations by renovating gasifiers and reducing raw coal unit consumption, helping companies to get out of trouble.†Cao Guangan, Deputy General Manager, Jiangsu Hengsheng Chemical Fertilizer Co., Ltd. He told reporters with deep feelings. The reporter saw at Hengsheng Chemical Fertilizer Company on May 26th that through the transformation of the gasifier, the company's raw material consumption for synthetic ammonia raw coal has dropped from the original 1250kg to less than the current 1150kg. According to its annual output of 350,000 tons of synthetic ammonia, it can save 35,000 tons of raw material coal / year, and bring the economic benefits of 42 million yuan.
At present, domestic small nitrogenous fertilizer companies are facing two major difficulties that are difficult to resist: First, due to the country's implementation of a 100% special tariff, the price of chemical fertilizers has dropped sharply, and the other is that raw coal prices have continued to climb. According to Cao Guang'an, they selected the breakthrough from the predicament on the reduction of consumption of raw coal, and the concrete measure taken was to transform the gasifier.
At Hengsheng Chemical Fertilizer Company, the reporter interviewed Xi Xihong, the person in charge of the technical reform project. "The small nitrogen fertilizer gasification process, there is no uniform model on the equipment, companies can only choose their own, according to local conditions." Yu Xihong said. The Hengsheng Fertilizer Technical Reform Project focuses on the following four aspects in terms of process design and equipment selection: First, the ratio of the height to diameter of the gas generating furnace is matched with the wind pressure of the fan; second, the ventilation volume of the furnace wall and the material height of the furnace Matching; third is the match between the height of the furnace wall and the slag bar; fourth is the matching of the steam inlet and inlet positioning of the steam system.
Yu Xihong further introduced that for many years the diameter of the main equipment gasifier has constantly changed, but the chassis structure has not changed at all. If it continues to expand, it is not conducive to the smooth operation of the furnace. Therefore, on the basis of summing up the previous experiences and lessons learned, the company chose the pressurized conical jacket with a caliber of 2.8 meters in the end. Its advantage is that in the case of increased gas production, the high pressure steam produced is greatly reduced, and can be directly used for conversion, and the corresponding heat loss is greatly reduced. At the same time, they also added a decarbonization and air recovery device, and used the current advanced pressure swing adsorption process to recover hydrogen and use it for ammonia production.
However, these small nitrogenous fertilizer companies also face some technical problems that they cannot solve in the technological reform process. According to Yu Xihong, the expansion load of the gasifier has accelerated the aging of the chassis, shortened the operating cycle of the chassis and increased maintenance costs. Therefore, on behalf of related companies, he appealed to the equipment manufacturers: For the chassis load and lubrication problems of the gasifier, it is hoped that the manufacturers will actively cooperate and extend the operating cycle to more than one year.
At present, domestic small nitrogenous fertilizer companies are facing two major difficulties that are difficult to resist: First, due to the country's implementation of a 100% special tariff, the price of chemical fertilizers has dropped sharply, and the other is that raw coal prices have continued to climb. According to Cao Guang'an, they selected the breakthrough from the predicament on the reduction of consumption of raw coal, and the concrete measure taken was to transform the gasifier.
At Hengsheng Chemical Fertilizer Company, the reporter interviewed Xi Xihong, the person in charge of the technical reform project. "The small nitrogen fertilizer gasification process, there is no uniform model on the equipment, companies can only choose their own, according to local conditions." Yu Xihong said. The Hengsheng Fertilizer Technical Reform Project focuses on the following four aspects in terms of process design and equipment selection: First, the ratio of the height to diameter of the gas generating furnace is matched with the wind pressure of the fan; second, the ventilation volume of the furnace wall and the material height of the furnace Matching; third is the match between the height of the furnace wall and the slag bar; fourth is the matching of the steam inlet and inlet positioning of the steam system.
Yu Xihong further introduced that for many years the diameter of the main equipment gasifier has constantly changed, but the chassis structure has not changed at all. If it continues to expand, it is not conducive to the smooth operation of the furnace. Therefore, on the basis of summing up the previous experiences and lessons learned, the company chose the pressurized conical jacket with a caliber of 2.8 meters in the end. Its advantage is that in the case of increased gas production, the high pressure steam produced is greatly reduced, and can be directly used for conversion, and the corresponding heat loss is greatly reduced. At the same time, they also added a decarbonization and air recovery device, and used the current advanced pressure swing adsorption process to recover hydrogen and use it for ammonia production.
However, these small nitrogenous fertilizer companies also face some technical problems that they cannot solve in the technological reform process. According to Yu Xihong, the expansion load of the gasifier has accelerated the aging of the chassis, shortened the operating cycle of the chassis and increased maintenance costs. Therefore, on behalf of related companies, he appealed to the equipment manufacturers: For the chassis load and lubrication problems of the gasifier, it is hoped that the manufacturers will actively cooperate and extend the operating cycle to more than one year.
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