Analysis of Energy Conservation and Emission Reduction Measures in China's Chemical Industry

Energy-saving and emission-reduction is a basic national policy of our country, and it is also an inevitable choice for realizing the sustainable development of our country's economy. As a large-energy-consuming chemical production industry, we should pay more attention to this issue. Saving energy and reducing consumption is taking technically feasible and economically reasonable measures to increase the efficiency of energy use and minimize energy consumption. At present, the energy conservation measures adopted in the chemical industry mainly include the following aspects:

1, the use of new technology and new equipment

Advanced production technology and energy-saving equipment are important means for chemical companies to save energy and reduce consumption. The use of advanced technology to optimize the total energy use of the process, including the use of energy-efficient processes, optimization of process parameters such as conversion, reflux ratio, cycle ratio, etc., to improve the flexibility of the device operation, improve the reaction operating conditions, reduce energy consumption. Efficient energy-saving devices such as mass fractionation towers, heat exchangers, air coolers, pumps, compressors, and heating furnaces, such as mass transfer, heat transfer, and rotation, are used, and the production capacity of the individual devices is increased, and energy conservation and consumption reduction are realized at the source.

2. Reduce power consumption

Power energy consumption mainly includes electricity and steam consumption, which is a major part of the energy consumption of chemical companies. Reduce the power consumption can use motor frequency control technology. Based on the current status of low loading rate in most chemical companies, the use of variable frequency speed control technology is undoubtedly an effective way to save energy. Heating system optimization. Reasonably implement the combination of devices to optimize the matching of cold and heat logistics within a wide range to achieve optimal energy utilization.

3, comprehensive utilization of energy

There are many types of energy used by chemical companies, ranging from high grades to low grades. The process involves both endothermic and exothermic processes. The fuels, steam, electricity, mechanical energy, and flammable gases, reaction heat, and heat generated in the production process are used in large quantities in production. This kind of energy can be effectively combined to achieve efficient use of system energy. About 80% of the total heat energy consumed by chemical companies is ultimately emitted from low-grade thermal energy. Therefore, the effective use of low-level thermal energy is the key to improving the utilization rate of chemical energy.

4, descaling and anti-corrosion insulation

In chemical companies, the continuous operation of the heat exchanger is prone to fouling, resulting in reduced heat transfer efficiency. It needs to be removed by chemical cleaning or mechanical cleaning. It is a simple and easy method to use anti-scaling agent to prevent scaling or reduce the speed of scaling.

5. Strengthen energy management

In the field of chemical production, energy consumption can be reduced by 5% to 20% by strengthening energy management.