The high energy cost of the ammonium sulphate process has caused heavy pressure on coking enterprises. Nowadays, with the official launch of the low-temperature ammonium sulphate reform project of Jiangsu Shagang Group, the coking enterprise has suffered a great solution. Jiangsu Shagang’s 1 million tons/year coking unit adopts a new low-temperature ammonium sulfate process, which can save steam and other expenses of about 7.45 million yuan per year.
The product can be increased by 600,000 yuan per year due to good product quality. The low-temperature ammonium sulfate process also increases the product revenue while reducing the energy cost of the enterprise, and it is expected to open a new pattern of coking chemical production of ammonium sulfate. At present, the process of desulfurization of coke oven gas to produce ammonium sulfate is mainly based on the saturator process. Although the process has the advantages of compact equipment, short process flow, high efficiency, easy operation, low investment, low operation and maintenance cost, etc. However, because of the need for forced evaporation, the equipment is seriously corroded, the energy is wasted, and waste water is generated. These problems erode the green and healthy development of coking enterprises. Xingtai Gnile Reed Environmental Technology Development Co., Ltd. fully absorbs the advantages of traditional deamination process, overcomes its drawbacks, and develops low-temperature ammonium sulfate energy-saving technology. This technology can carry out process modification without changing the process flow, gas quality and main equipment, and the whole process will not stop production. After the coke oven gas does not heat up after desulfurization, it can be denitrified by the blower compression to 37 °C, and then the mother liquor is added with different proportions of catalytic aid after three stages, and the mother liquor and the catalyst auxiliary react to reach equilibrium. After that, deamination can be carried out in an infinite cycle. The new deamination process removes the heating zone in which the coke oven gas is heated from 32 ° C to 55 ° C to 80 ° C in the conventional process and the cooling section is cooled to 26 ° C after deamination, which greatly reduces the original gas. The temperature gradient of the process reduces the energy consumption and water consumption of the heating steam and the cooling and cooling, reduces the corrosion of the coke oven gas to the subsequent gas system, reduces the discharge of wastewater and the amount of primary water, and forms a green, energy-saving and low A new process of consumption and environmental protection.
Calculated by coking capacity of 1 million tons/year of Jiangsu Shagang: The annual desulfurization process can save steam costs of 6.63 million yuan, water fee of 10,000 yuan, biochemical cost of 24 yuan, cooling water cost of 390,000 yuan, and electricity bill. 170,000 yuan, the annual savings of about 7.44 million yuan. In addition, since the added catalytic aid contains a large amount of regenerable crystal nucleus, the produced ammonium sulfate product particles are large and uniform, and the phase is good. The yield per ton can be increased by 50 yuan, and the annual output of ammonium sulfate is 11,700 tons. Calculated, the annual product increase and receipt of nearly 600,000 yuan. Tr
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