Device and method for treating oil-containing crude synthesis gas by combining normal-temperature/low-temperature methanol washing
A low-temperature methanol washing, crude synthesis gas technology, applied in separation methods, chemical instruments and methods, petroleum industry and other directions, can solve the problems of increasing equipment investment, operation and maintenance costs, increasing the loss of cooling capacity, etc. Cooling consumption, stable operation, reasonable design effect
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Embodiment 1
[0060] figure 2 It is the schematic flow sheet of this embodiment 1, as figure 2 As shown in, in the treatment device for oil-containing crude syngas, the crude syngas containing oil enters the normal temperature methanol prewash tower 14 from the oil-containing crude syngas inlet 11 for prewashing, and then enters the low-temperature methanol washing device 15, After desulfurization and decarburization treatment, the obtained purified syngas is output from the purified gas outlet 16 to the low-temperature methanol washing device 15, and enters the next section.
[0061] This Example 1 is mainly aimed at crude oil-containing syngas, by eliminating the traditional low-temperature methanol to wash CO 2 In the pre-washing section of the absorption tower, the method of using normal temperature methanol pre-washing before the low-temperature methanol washing process is cancelled to treat the crude synthesis gas containing oil.
[0062] The new normal temperature methanol prewas...
Embodiment 2
[0064] Example 2 is based on the device described in Example 1, adding a sulfur-tolerant shift device between the normal temperature methanol pre-wash tower and the oil-containing crude synthesis gas inlet, that is, the sulfur-tolerant shift device is located before the normal temperature methanol pre-wash tower. .
[0065] In this example, the crude oil-containing syngas is mainly used to remove the traditional low-temperature methanol for CO washing. 2 Absorption tower pre-wash section, cancel the use of low-temperature rich CO 2 The prepared methanol solution absorbs BTX impurities in the crude gas, so that the crude gas enters the sulfur-tolerant shift device 131 and the normal temperature methanol prewash tower 14, and uses normal temperature lean methanol to absorb the BTX impurities in the crude gas.
[0066] In this embodiment, the gasification source of the crude syngas containing BTX comes from a single gasification method, such as Luqi furnace, BGL furnace, Yunnan ...
Embodiment 3
[0074] Figure 4 This embodiment 3 normal temperature / low temperature methanol washing is combined to process oily crude synthesis gas schematic diagram, such as Figure 4 As shown, on the basis of Example 2, an additional sulfur-tolerant shift device 132 is directly connected to the low-temperature methanol washing device 15, and the sulfur-tolerant shift device 132 is also provided with an oil-free crude syngas inlet.
[0075] Provide crude syngas containing BTX, gasification methods such as: Luqi furnace, BGL furnace, Yunnan furnace, Hygas or coal oil slurry; and provide crude syngas without BTX, gasification methods such as: coal water slurry or pulverized coal A combination of gasification methods such as pressurized gasification.
[0076] The crude synthesis gas containing BTX and the crude synthesis gas without BTX are divided into two streams, and enter into the sulfur-tolerant shift device 131 and the sulfur-tolerant shift device 132 respectively for shift reaction. ...
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