Simultaneous reaction system and method for organic material pyrolysis and combustion

A simultaneous reaction method for organic material pyrolysis and combustion, wherein a solid thermal carrier is used as a heat-transfer medium, and pyrolysis and combustion are carried out in the same time sharing reactor;

• the method comprises the following steps:
• (I) feeding stage:
• open a sealed valve A and close a sealed valve B;
• a low viscosity organic material is sent into a low viscosity organic material bin through the sealed valve A on the top of a low viscosity organic material feeder;
• when the amount of the low viscosity organic material reaches a given quantity, close the sealed valve A, open the sealed valve B and operate the shredder;
• the low viscosity organic material is crushed into pieces of 1-5 mm, and then sent into the time sharing reactor for pyrolysis and combustion through the screw feeder;
• open the sealed valve C and the high viscosity organic material is sent into the high viscosity organic material bin through the sealed valve C;
• when the amount of the high viscosity organic material reaches a given quantity, close the sealed valve C;
• the high viscosity organic material in the high viscosity organic material bin is melted by the high-temperature saturated water/steam inside the water jacket and then jetted into the time sharing reactor for pyrolysis and combustion by the push-type injection feeder;
• (II) pyrolysis stage:
• close the valve of the flue gas outlet of the time sharing reactor for pyrolysis and combustion and the organic material that is sent into the time sharing reactor for pyrolysis and combustion mix fully and evenly with the solid thermal carrier;
• the solid thermal carrier rapidly heats the organic material and the pyrolysis reaction takes place, which produces the pyrolysis residue and the pyrolysis volatility products;
• open the pyrolysis volatility products outlet;
• the heavy tar in the pyrolysis volatility products is condensed and absorbed in the reactor, most of the pyrolysis volatility products are sent into the condenser A of the recovery apparatus for pyrolysis volatility products, and the pyrolysis residue and a small amount of the pyrolysis volatility products are left in the time sharing reactor for pyrolysis and combustion;
• the pyrolysis volatility products exchanges heat indirectly with the condensed water in the condenser A;
• the pyrolysis oil in the pyrolysis volatility products is condensed and liquefied into droplets and enters the recovery apparatus for pyrolysis oil through the oil discharge outlet;
• the rest of the pyrolysis gas is sent into the recovery apparatus for pyrolysis gas;
• after the heat exchange, temperature of the water in the heat exchanger A increases, and the hot water is sent into the hot water inlet of the heat exchanger B through the hot water outlet;
• (III) combustion stage:
• when the pyrolysis reaction is over, close the valve of the pyrolysis gas outlet of the time sharing reactor for pyrolysis and combustion, and the temperature of the solid thermal carrier therein decreases, and fill air into the time sharing reactor for pyrolysis and combustion to combust with pyrolysis volatility products and the pyrolysis residue left in the reactor;
• after 2 seconds of reaction, open the valve of the flue gas outlet;
• the heat produced during combustion heats the solid thermal carrier in a form of multi-phase heat transfer, and the heated solid thermal carrier is left in the time sharing reactor for pyrolysis and combustion to provide energy for the next round of organic material pyrolysis;
• the flue gas is sent into the condenser B and exchanges heat indirectly with the hot water in the heat exchanger B;
• after being cooled below 120-200° C., the flue gas is sent into the dust remover;
• the dust-removed flue gas then enters the deacidification system for the removal of the acid gas;
• the above treatment brings the quality of the flue gas to standard and then the flue gas is released into air;
• after the heat exchange, the water in the heat exchanger B becomes high-temperature saturated water or steam which is then sent into the high temperature working medium inlet of the water jacket of the high viscosity organic material feeder to provide new high temperature working medium for heat exchange;
• (IV) alternating and circulating stage:
• when the combustion reaction is over, close the valve of the flue gas outlet of the time sharing reactor for pyrolysis and combustion;
• the low viscosity organic material or high viscosity organic material are again sent into the time sharing reactor for pyrolysis and combustion for pyrolysis process;
• when the pyrolysis is over, the combustion process is carried out;
• the process is thus repeated;—the whole process adjusts the output rate of the pyrolysis oil and the pyrolysis gas in the pyrolysis volatility products by using catalysts such as precious metal, metal composite oxide, perovskite and spinel.