The technology of producing acetylene by coal pyrolysis in hydrogen plasma reactor has disadvantages of high power consumption and low coal conversion.Single product makes the costs high and restricts the technology's industrialization.To solve this problem

this paper proposed the polygeneration system of acetylene production(by coal pyrolysis)and electricity generation(subcritical coal-fired power plant).Firstly

the thermal plasma reactor model

acetylene separation and purification system model

and coalfired power plant system model were established by Aspen Plus software

respectively.Then

the above three sub-systems were coupled to the polygeneration system model

and the sub-system model and polygeneration system model were optimized.By cascade utilization of energy and material

rational allocation of resources and energy saving of two complementary systems can be achieved.The simulation results indicate that

the hydrogen atmosphere was helpful to the acetylene production

the moisture content in the coal should not be greater than 5%

the optimal number of stages in the absorber was 24.After optimization

the power generation of the polygeneration system increased by 60.16 MW

and the energy consumption of the plasma device reduced by 4.62 MW.The polygeneration system is helpful to improve the economical performance and promote the industrialization of the thermal plasma technology.