为了获得更好的平衡曲线，该体系应在高温，高压蒸汽稀释和低反应体系压力下

In order to obtain a better equilibrium curve, the system should be carried out at high temperature, high-pressure steam dilution and low reaction system pressure, which is conducive to the conversion of ethylbenzene to styrene. In order to improve the conversion rate, two adiabatic reactors are used for the reaction. The total conversion of benzene can reach 70% to 85%. Fresh ethylbenzene and recovered ethylbenzene are first mixed with a portion of steam, then superheated in a steam superheater heated by fire, then mixed with superheated steam, and then dehydrogenated in a two-stage adiabatic radial catalytic reaction system. The hot reaction products are cooled in a heat exchanger to recover heat and condense. After compressing the non-condensable gas (mainly hydrogen), the hydrocarbons are recovered and then used as fuel for the steam superheater, and the condensed liquid is divided into condensed water and dehydrated organic mixture (DM). <br>In order to reduce the loss of styrene (SM) monomer during the polymerization process, a sulfur-free polymerization inhibitor is added to the dehydrated organic mixture (DM) (styrene, unreacted ethylbenzene, benzene, toluene, and a small amount of high-boiling compounds) (NSI), then in the ethylbenzene / styrene monomer (EB / SM) fractionation tower, the top light components (EB and light components (benzene / toluene) are taken from the top of the tower) to ethylbenzene separation In this way, benzene separates toluene and toluene from ethylbenzene and returns the recovered ethylbenzene to the raw material of the dehydrogenation reactor. The bottom of the EB / SM tower (styrene monomer and high boilers) is fractionated in the final styrene fractionation tower. The top product is styrene (SM) monomer product, and a small amount of bottom tar is used as steam superheater fuel. Part of the steam superheater requires fuel from dehydrogenated waste gas and styrene tar

In order to obtain a better balance curve, the system should be carried out under high temperature, high pressure vapor dilution and low reaction system pressure, which is conducive to the conversion of ethyl benzene to styrene. In order to improve the conversion rate, two insulation reactors are used to react. The total conversion rate of benzene can reach 70% to 85%. Fresh ethyl benzene and recycled ethyl benzene are first mixed with a portion of the steam, then overheated in a fire-heated steam superheater, then mixed with the superheated steam, and then dehydrogenated in a two-stage insulation radial catalytic reaction system. The thermal reaction product cools in the heat exchanger to recover heat and condense. After compressing the non-condensable gas (mainly hydrogen), the hydrocarbons are recovered and used as fuel for the steam superheater, and the condensed liquid is divided into condensate and dehydrated organic mixture (DM).<br>In order to reduce the loss of styrene (SM) monomers during polymerization, sulfur-free polymerinhibitors are added to dehydrated organic mixtures (DM) (styrene, unreacted ethyl benzene, benzene, toluene and a small number of high boiling-point compounds) (NSI), and then in ethyl benzene/styrene monomer (EB / / SM) separation in the fractionation tower, the top light components (EB and light components (benzene/toluene) removed from the top of the tower to the ethyl benzene separation tower, so that benzene is separated from ethyl benzene and returned to the recycled ethyl benzene in the dehydrogenator material. EB/SM tower bottoms (styrene monomers and high boilings) are fractioned in the final styrene fractionation tower, the tower top product is styrene (SM) monomer product, a small amount of tower tar is used as steam superheater fuel, most of the fuel required for the steam superheater comes from dehydrogenated exhaust gas and styrene tar

In order to obtain a better equilibrium curve, the system should be carried out at high temperature, high pressure steam dilution and low reaction pressure, which is conducive to the conversion of ethylbenzene to styrene. In order to improve the conversion, two adiabatic reactors were used. The total conversion of benzene can reach 70% to 85%. Fresh ethylbenzene and recovered ethylbenzene are first mixed with a part of steam, then superheated in a fire heated steam superheater, then mixed with superheated steam, and then dehydrogenated in a two-stage adiabatic radial catalytic reaction system. The reaction products of heat are cooled in a heat exchanger to recover heat and condense. After the non condensable gas (mainly hydrogen) is compressed, the hydrocarbon is recovered and used as the fuel of steam superheater, and the condensed liquid is divided into condensed water and dehydrated organic mixture (DM).<br>In order to reduce the loss of styrene (SM) monomer in the polymerization process, sulfur-free polymerization inhibitors were added to the dehydrated organic mixture (DM) (styrene, unreacted ethylbenzene, benzene, toluene and a small amount of high boiling point compounds) (NSI), and then in the Ethylbenzene / styrene monomer (EB/ SM) fractionator to separate the top light components (EB and light components (benzene / toluene) from the top of the tower) into the ethylbenzene fractionator, so that benzene can separate toluene and toluene from ethylbenzene, and return the recovered ethylbenzene to the raw material of the dehydrogenation reactor. The bottom of EB / SM tower (styrene monomer and high boiling matter) is fractionated in the final styrene fractionator. The top product is styrene (SM) monomer product. A small amount of tar at the bottom of the tower is used as the fuel of the steam superheater. Most of the fuel required for the steam superheater comes from the dehydrogenation waste gas and styrene coke oil