PROCESS AND APPARATUS FOR PRODUCING CARBON MONOXIDE

The present invention relates to a cold box cycle which allows for independent control of the heat supplied for reboilers associated with the separation columns. More specifically, the invention relates to the tight control of the hydrogen removal separation, thus avoiding the possibility of excess reboiling in this separation. Optimal reboiling also results in a lower temperature of the hydrogendepleted liquid from this separation. As this stream is used to provide a portion of the cooling at the cold end of the primary heat exchanger, lower temperatures facilitate cooling of the incoming syngas feed, reducing carbon monoxide (CO) losses into the crude hydrogen stream from the high pressure separator. Lower CO in the crude hydrogen allows for smaller hydrogen purification equipment. 本发明涉及一种冷箱循环，所述冷箱循环允许独立控制提供给与分离塔相关联的再沸器的热量。更具体地讲，本发明涉及严格控制去氢分离，从而避免在所述分离中过度再沸腾的可能性。最佳再沸腾还使得来自所述分离的贫氢液体的温度较低。当所述流用于在初级热交换器的冷却端提供一部分冷却时，较低温度有利于冷却进入的合成气进料，从而减少来自高压分离器的粗氢流中的一氧化碳(CO)损失。所述粗氢中较低的CO允许使用较小的氢纯化设备。