Simulation And Design Of Condensation-adsorption Integrated VOCs Treatment Technology Based On Fluent

Volatile organic compounds?VOCs?are the key precursors of fine particles(PM_2.5),secondary organic aerosols?SOA?and ozone?O₃?in the atmospheric environment.In recent years,the pollution control of VOCs has become the focus of air pollution control in China.With the increasingly strict emission standards and the gradual integrity of the regulatory system of VOCs in China,various VOCs treatment technologies and equipment are intermingled and disorderly.However,there is still a lack of VOCs purification process mechanism and equipment design experience in the VOCs treatment market,which leads to the failure of the treatment equipment to effectively deal with VOCs under the emission conditions,and at the same time,it is easy to cause potential safety hazards.Based on this,devoting to popularize the main design and optimization of VOCs treatment process with great application of prospect in the current market,discussing the main factors affecting the treatment efficiency of VOCs treatment equipment,which is not only conducive to the self-regulation and acceptance of treatment equipment of different scale VOCs emission enterprises,but also to meet the urgent needs of the current environmental protection market and environmental protection supervision departments.In this paper,a three-stage condensation adsorption integrated process of VOCs treatment with great application market and development potential,in view of the characteristics of high concentration and low air volume in the tail gas discharge of the project and the specific situation that the main pollutant is tetrahydrofuran?THF?with high recovery value,is designed,including parameter design and equipment selection of the integrated process.At the level of optimizing the main equipment of the integrated process,fluent is used to simulate the flow field distribution of the inside of equipment,and the main factors affecting the treatment efficiency of the equipment are discussed.The simulation results show that the baffle spacing is the decisive factor of the shell side of the heat exchange efficiency.When the baffle spacing is 0.55D and the baffle gap height is 0.25D,the efficiency is the highest?D is the nominal diameter of heat exchanger?;The analysis of radial velocity of runoff adsorption equipment shows that the flow field distribution in the equipment is relatively good when the height diameter ratio value of runoff adsorption equipment is in the range of 2?2.5;A round platform module baffle is added for improvement and optimization of the runoff adsorption equipment,and the flow field simulation result shows that the adsorption process of the improved module is increased,besides,the uniform distribution of the flow field in the desorption process can be optimized.In this paper,through the design and simulation of the integrated condensation adsorption VOCs treatment process and the core equipment,the computational fluid dynamics method is applied to the VOCs treatment work,the design method of the integrated condensation adsorption VOCs treatment process is defined,the main factors affecting the treatment efficiency of the process equipment are explored,It has a positive effect and significance on the popularization of condensation-adsorption integration technology in VOCs governance market and the further improvement of process governance efficiency.