Cyclic absorption tower
The technology of an absorption tower and an absorption tank, which is applied in the field of trichlorosilane devices, can solve the problems of easy clogging of equipment pipelines and removal of chlorosilane, and achieve the effects of stable temperature, high absorption rate and high efficiency
Inactive Publication Date: 2016-11-23
天津深蓝宇节能减排技术有限公司
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Problems solved by technology
[0002] Pressurization and cooling can only condense most of the chlorosilanes in the tail gas of the trichlorosilane synthesis section and the trichlorosilane fractionation section, but there are still a small part of chlorosilanes that cannot be removed from the tail gas
If this part of the tail gas is directly washed with water, chlorosilane will react with water to produce silica, and silica is easy to block equipment pipes
Method used
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Embodiment Construction
[0012] refer to figure 1 , 2 , the circulating absorption tower of the present invention, wherein the absorption tower 4 is connected with the circulating absorption tank 2, and the circulating absorption tank 2 has a circulating absorption liquid outlet 8 and a circulating absorption liquid inlet 9 on one side, and the other side is connected with the canned pump 1, and the canned pump passes through the pipeline It is connected with the condenser 3, and the condenser 3 is connected with the nozzle 16 of the condenser of the absorption tower. There is a redistributor 15 between the saddle packing layers 5, the gas riser 7 at the top of the absorption tower, and the liquid return pipe 11 on the upper side are connected to the demister 12, which contains silicone oil impregnated glass wool 13, and the top There is a gas outlet 14 . The distribution plate of the redistributor has multiple redistribution holes.
[0013] When the circulating absorption tower is working, the abs...
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The invention relates to a device for absorbing trichlorosilane in tail gas generated in a trichlorosilane synthesis and fractional distillation section. A cyclic absorption tank is connected below a cyclic absorption tower and provided with a cyclic absorption liquid inlet and a cyclic absorption liquid outlet, the cyclic absorption tank is connected with a shield pump which is connected with a condenser, the condenser is connected with the absorption tower, and a nozzle is connected to the end of a connection pipeline. The absorption tower is provided with a gas inlet and internally provided with intalox metal tower packing layers, and redistributors are arranged among the intalox metal tower packing layers. A gas ascending pipe at the top of the absorption tower and a liquid backflow pipe on the upper side of the absorption tower are connected with a demister which is internally provided with silicon oil impregnated glass wool, and the top of the demister is provided with a gas outlet. Distribution plates of the redistributors are provided with a plurality of redistribution holes. In operation, an absorbent in the cyclic absorption tank is sprayed into the absorption tower, entered tail gas contacts with the absorbent in the intalox metal tower packing layers to realize absorption of trichlorosilane, and after gas demisting, mist liquid drops flow back into the absorption tower, gas enters a falling film absorption tower, and the absorbent enters a semi-finished product tank.
Description
technical field [0001] The invention relates to a device for absorbing trichlorosilane in the tail gas of a trichlorosilane synthesis section and a trichlorosilane fractionation section. Background technique [0002] Pressurization and cooling can only condense most of the chlorosilanes in the tail gas of the trichlorosilane synthesis section and the trichlorosilane fractionation section, but there are still a small part of chlorosilanes that cannot be removed from the tail gas. If this part of the tail gas is directly washed with water, chlorosilane will react with water to produce silica, and silica is easy to block equipment pipes. Contents of the invention [0003] The purpose of the present invention is aimed at above-mentioned present situation, aims to provide a kind of circulation absorption tower that can effectively absorb trichlorosilane blanket. [0004] The way to realize the object of the present invention is a circulation absorption tower, wherein the absor...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B01D53/18
CPCB01D53/18B01D2252/10B01D2257/204
Inventor 李民凯
Owner 天津深蓝宇节能减排技术有限公司