A kind of whole temperature range pressure swing adsorption method of vinyl chloride dehydration
A technology of pressure swing adsorption and vinyl chloride, which is applied in separation methods, chemical instruments and methods, preparation of halogenated hydrocarbons, etc., can solve the problems of high energy consumption, high cost, and short device life, and achieve low energy consumption and low cost , The effect of long device life
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Embodiment 1
[0034] Such as figure 1 Shown, a kind of full temperature range pressure swing adsorption method of vinyl chloride dehydration, the step of this method is as follows:
[0035] (1) Pretreatment process;
[0036] One-time solid adsorption is adopted, which is carried out in an adsorption device containing at least two adsorption towers. One of the adsorption devices is always performing adsorption, and the remaining adsorption towers are transferred out of offline regeneration or replaced with new adsorbents; from the vinyl chloride rectification tower The raw material gas of vinyl chloride enters from the bottom of the tower. The mass concentration of vinyl chloride is 90%~99%. The top is discharged into the next process, and the oil, heavy molecular gas, and a small amount of water in the raw gas are adsorbed by the adsorbent;
[0037] (2) Dehydration process;
[0038] a. Using adsorption concentration process, the system consists of 2 adsorption towers, 1 intermediate tank...
Embodiment 2
[0047] Such as figure 1 Shown, a kind of full temperature range pressure swing adsorption method of vinyl chloride dehydration, the step of this method is as follows:
[0048] (1) Pretreatment process;
[0049] Adopt disposable solid adsorption, carry out in the filter adsorption device, the stuffing of packing in the filter is activated carbon or similar solid adsorbent; The raw material gas of vinyl chloride from the vinyl chloride rectification tower enters from the bottom of the tower, and the mass concentration of vinyl chloride is 90%~99%, adjust the temperature to 120~150°C, adjust the pressure to 1.0~1.8MPa, and the purer vinyl chloride after adsorption and removal of impurities is discharged from the top of the adsorption tower into the next process. Molecular gas, a small amount of water, etc. are adsorbed by the adsorbent;
[0050] (2) Dehydration process;
[0051] a. The adsorption concentration process is adopted, which consists of 2 adsorption towers, 1 interm...
Embodiment 3
[0058] Such as figure 1 Shown, a kind of full temperature range pressure swing adsorption method of vinyl chloride dehydration, the step of this method is as follows:
[0059] The pretreatment process adopts one-time solid adsorption. The oil stains, heavy molecular gases, and a small amount of water in the raw gas are adsorbed by the adsorbent, and the relatively pure vinyl chloride after adsorption and removal of impurities is discharged from the top of the adsorption tower into the adsorption and concentration process; the adsorption and concentration process The vinyl chloride gas is passed into the bottom of one of the adsorption towers for adsorption, the adsorption pressure is 1.8-2.5 Mpag, and the operating temperature is 80-110°C; the two adsorption towers are operated alternately to ensure continuous gas entry; after the dehydration tower is equalized Use a vacuum device to evacuate; keep the vacuum in the vinyl chloride dehydration tower at -0.092Mpa~-0.094Mpa, comp...
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