The invention relates to a method for producing acetylene and syngas by partially oxidizing hydrocarbons with oxygen, the initial gases, which comprise a hydrocarbon flow and an oxygen-containing flow, being first separately preheated, and then mixed in a mixing zone and caused to react, after flowing through the combustor block (1), in the combustion chamber (2), and then cooled rapidly, wherein said method is characterized in that the inner wall of the combustion chamber is covered by a purge gas flow (3), said purge gas flow is introduced by means of a plurality of infeed lines, and each of said infeed lines is designed in the interior of the combustion chamber such that the orientation of the directional vector of the main flow of the applied purge gas flow deviates from the orientation of the directional vector of the main flow direction of the gas flow fed through the combustor block at an angle of no greater than 10 DEG , and the infeed lines comprise a gap width of 1/1000 to 3/100, preferably 1/500 to 1/100 of the diameter of the combustion chamber at the outlet opening thereof, wherein a multistage infeed of the purge gas flow takes place at locations one after the other as seen in the main flow direction of the gas flow fed through the combustor block, wherein the open cross section of the combustion chamber available to the gas flow exiting from the combustor block in order to flow through the combustion chamber is approximately constant at the level of the infeed lines of the purge gas flow.