Separation device and method for synthesis gas

Abstract

The invention provides a separation device and a method for synthesis gas. The separation device for the synthesis gas comprises a first washing tower, a second washing tower, a flash tower, a first separation tower, a second separation tower, a first separation tank and a second separation tank, the first separation tank is respectively communicated with the first washing tower and the flash tower; the second separation tank is respectively communicated with the second washing tower and the flash tower; the first washing tower is communicated with the flash tower, the second washing tower iscommunicated with the flash tower, the flash tower is communicated with the first separation tower, the first separation tower is communicated with the second separation tower, the second separation tower is communicated with the first washing tower, and the first separation tower is communicated with the second washing tower. The invention further provides a separation method completed by using the separation device, the separation device and the separation method can be used for simultaneously preparing an OXO product, a pure H2 product and a pure CO product, and the purity of the pure H2 product and the purity of the pure CO product can reach 99v% or above.

Description

Technical field[0001]The invention relates to a separation device and method, in particular to a synthesis gas separation device and method, and belongs to the technical field of gas separation.Background technique[0002]At present, the partial condensation process, methane washing process and carbon monoxide washing process are widely used in the cryogenic separation of synthesis gas. However, when the raw synthesis gas contains H2, CO, CH4, N2When the components are equal, the above processes need to be combined with other processes to simultaneously prepare OXO (H2And CO mixture), pure H2And pure CO.[0003]The existing methods for processing syngas mainly include the following:[0004]Example 1: Partial condensation process. Such as coal water slurry or dry coal powder gasification, regardless of whether the raw syngas contains CH4, N2The content of the components or these components is too low, the process can not directly obtain pure H2(99v%+), rich H2The partial pressure of the CO...

AI Technical Summary

Problems solved by technology

[0010] Since the raw syngas contains more CH 4 , OXO and pure H cannot be obtained at the same time according to the existing conventional cryogenic separation process 2 and pure CO products, pressure swing adsorption must be set to produce H 2 unit can be realized

[0011] When the scale of the device is very large, the PSA H 2 It occupies a huge area, and it is almost impossible to arrange it in a factory area with a limited area, and when the pressure swing adsorption system H 2 Equipment, program-controlled valves, and adsorbents become expensive due to their large scale, which also makes the economics of the entire chemical plant device poor.

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