Ethylene: Strictly Controlling the "Down" Character

Since the beginning of this year, Wuhan Ethylene Power Division has strictly controlled the “down” word, and the process optimization and equipment reform have taken many measures to achieve practical results. As of the end of December, the division saved more than 80 million yuan.

Power struggles to optimize system operation. As the source of Wuhan Ethylene's power, the power division takes the improvement of the self-generation capacity of heat and power cogeneration units as the most important factor in increasing revenue. Through effective system optimization, the unit's self-generation power consumption has increased from 80% in 2013 to 87%, saving on electricity purchase costs of RMB 11.86 million. At the same time, the division devoted itself to reducing the amount of electricity used by the device: the 10 intermediate water pumps that are responsible for the treatment of cations and cations in the chemical water device are power-hungry, and the device continuously optimizes the system flow, and adopts the method of cutting the pump impeller, saving 570,000 kWh annually.

Ke coal will be the province, process management Qi battle. In the first half of the year, in order to make full use of the plant's wealthy pyrolysis recovery gas, the cogeneration unit actively optimised the process and introduced it into the CFB boiler. As of the end of November, the device used a total of 8.613 million standard pyrolysis recovery gas, equivalent to 9518.2 tons of standard coal, saving fuel costs about 7.615 million yuan. In order to reduce the power consumption of standard coal for power supply and coal consumption for heating standard, the device has improved the economic operation level of the device through small index competitions and assessment of economic responsibility system, and reduced the coal consumption for standard coal supply and standard heating coal consumption to 363.18 g/kWh, respectively. At the time of 37.5 kg/kg coke, the fuel saving cost is more than 28 million yuan.

Excess heat will be used to strengthen technical research. At the beginning of the year, the combined heat and power unit used to recover the exhaust gas heat of the deaerator exhaust gas and fixed row expansion tanks. The low temperature desalinated water was used as a medium to recover the exhaust gas heat and the demineralized water temperature of the deaerator was increased from 30°C to 90°C. As of the end of October, a total of 12,000 tons of standard coal was recovered as heat, saving fuel costs of 9.6 million yuan. The chemical water division of the Division passed technical breakthroughs to reduce the amount of circulating cooling water and increase the temperature of desalinated water. The temperature of desalinated water for heating and power cogeneration units was increased by 5°C, and the temperature of desalinated water for chemical water was increased by 13°C. The annual cost savings were achieved. 450 million.