Raw gas separation system

The invention discloses a raw gas separation system which comprises a tower body, wherein a gas outlet pipe is connected with the top of the tower body; a raw gas inlet is formed in the lower part of the tower body; a tar discharging pipe is connected with the bottom of the tower body; a first tar spraying pipe is connected with the upper part of the tower body; a first tar nozzle which extends into the tower body and is positioned below the gas outlet of the gas outlet pipe is connected onto the first tar spraying pipe; a second tar spraying pipe is connected with the middle of the tower body; a second tar nozzle which extends into the tower body is connected onto the second tar spraying pipe, and positioned below the first tar nozzle; the ratio of the length between the first tar nozzle and the top of the tower body to the total length of the tower body is (1:10)-(2:9); the ratio of the length between the second tar nozzle and the top of the tower body to the total length of the tower body is (1:2)-(2:3); the ratio of the length between the raw gas inlet and the top of the tower body to the total length of the tower body is (2:3)-(4:5). Through adoption of the raw gas separation system, the problems that the conventional oil-gas separation device is complex in structure, the effect of removing dust and tar is poor, the cost is high, and maintenance is inconvenient can be solved.