초록 ▼

A method and an apparatus for performing combustion in a closed system employing recirculated exhaust gas, by the use of a combustion chamber and an exhaust gas cleaning chamber connected by an exhaust gas duct and a recirculation pipe to the combustion chamber. The exhaust gas cleaning chamber has

A method and an apparatus for performing combustion in a closed system employing recirculated exhaust gas, by the use of a combustion chamber and an exhaust gas cleaning chamber connected by an exhaust gas duct and a recirculation pipe to the combustion chamber. The exhaust gas cleaning chamber has an oxygen supply pipe, means for supplying a pressurized aqueous solution (or oxidant-absorbing pressurized aqueous solution), a carbon dioxide supplying means, and a mixing fan. A safety pressure valve is provided on said exhaust gas cleaning chamber for discharging excess exhaust gas that becomes present in this chamber to the outside of the apparatus. The oxygen supply pipe has an oxygen flow rate regulator. An oxygen content sensor is provided in the recirculation pipe leading from the cleaning chamber to the combustion chamber and this sensor is operably connected to the oxygen flow rate regulator. In this combustion method and apparatus, because the combustion chamber is closed, practically no oxidant constituents NOx or NOx plus SOx are discharged to the atmosphere, and the supply of oxygen in the recirculating exhaust gases is regulated to be about the same as that of air (about 21 vol.%). This method and apparatus can be applied to internal combustion engines as well as to external combustion devices, such as furnaces, boilers and the like.

대표청구항 ▼

A method for performing combustion, employing a combustion system of the closed circulation type having a combustion means and means to lead the exhaust gas produced from the combustion means to a cleaning means for removal of oxidant constituents from the exhaust gas, which comprises: while excludi

A method for performing combustion, employing a combustion system of the closed circulation type having a combustion means and means to lead the exhaust gas produced from the combustion means to a cleaning means for removal of oxidant constituents from the exhaust gas, which comprises: while excluding the entry of air into the combustion system, carrying out the steps of supplying the oxygen required for combustion into the cleaning means from a pure oxygen source provided outside of the system, mixing said oxygen with cleaned exhaust gas within the cleaning means to form an oxygen-containing gas which is capable of supporting combustion and is essentially free of nitrogen, supplying a fuel into the combustion means from outside the system, feeding the oxygen-containing gas to said combustion means and effecting combustion of the fuel with said oxygen-containing gas, feeding the exhaust gas from said combustion means to said cleaning means and therein removing oxidants thereform to form said cleaned exhaust gas, and discharging excess exhaust gas contained in the cleaning means to the outside of the system to maintain the pressure of the oxygen-containing gas fed to said combustion means at a value capable or providing stable combustion conditions.