Cold hydrogenation system heat energy comprehensive utilization device

The utility model discloses a heat energy comprehensive utilization device of a cold hydrogenation system. Lower shell, a waste gas feeding hole is formed in the lower part of the left side of the lower shell; a cleaning opening is formed in the center of the bottom of the lower shell; a first condenser, a second condenser and a third condenser are sequentially arranged at the upper part of the lower shell from bottom to top through flange connection; an upper shell is arranged at the upper part of the third condenser; a waste gas outlet is formed in the upper part of the right side of the upper shell; a gas blowback opening is formed in the center of the top of the upper shell; the connecting parts of the lower shell, the first condenser, the second condenser, the third condenser and theupper shell are kept in a sealed state, and the first condenser, the second condenser and the third condenser form an annular channel with a third flange and a sixth flange through a third partition plate, a fourth partition