Ultra-deep removal device for organic sulfur in coke oven coal gas, and removal process thereof

The invention discloses an ultra-deep removal device for organic sulfur in coke oven coal gas, and a removal process thereof. The device comprises an oil removal tower, a first heat exchanger, a pre-hydrogenation and first-stage hydrogenation reactor, a condenser, a normal-temperature desulfurization tower, a second heat exchanger, a second-stage hydrogenation reactor, a cobalt-molybdenum hydrogenation reactor, a fine desulfurization tower and an ultra-fine desulfurization tower. According to the scheme, the cobalt-molybdenum hydrogenation reactor and the ultra-fine desulfurization tower are simultaneously arranged at the front end and the rear end of the fine desulfurization tower, and the cobalt-molybdenum hydrogenation reactor is arranged between the second-stage hydrogenation reactor and the fine desulfurization tower, so that the content of the residual organic sulfur in the fine desulfurization tower is less than 0.03 ppm; and the ultra-fine desulfurization tower is arranged behind the fine desulfurizat