丙烯酸精制工艺流程（Acrylic acid refining process）.docVIP

丙烯酸精制工艺流程（Acrylic acid refining process） 1 process 1.1 production process principle This position will be responsible for about 48 acrylic acid (WT) before the post from the aqueous solution of acrylic acid by dehydration, acetic acid and increasedrestructuring refined into 99.5 (WT) of high purity acrylic products. 1.2 production process description 1.2.1 light component fractionation system 2T - 201 (crude acrylic tank) in acrylic acid solution by 2P - 201A / B (acrylic acid pump) sent to 2C - 210 (light component fractionator) fifteenth plates. Here, with FC - 2032 and FC - 2031 control feeding quantity. 2C - 210 for the plate tower, there are 17 plates, the upper filler. In 2C - 210, the water and acetic acid separated from acrylic acid by azeotropic distillation. The azeotropic agent used is toluene. Water, acetic acid and toluene by vacuum distillation as azeotropic distilled from 2C - 210 tower distillate by 2E - 212 (2C - 210 CTW is part of the condenser) condensation of condensate into the 2D - 211 (2C - 210 tower tank), non condensable gases into 2E - 213 (2C - the 210 tower exhaust condenser) by CTW condensation, condensation into 2D - 211, 2E - 213 from the gas out of the water ring vacuum pump 2P - 216A / B (2C - 210 vacuum pump) by 2PD - 216 (2P - 216 tank vent recovery tank by 2E - (216) 2P - 216 gas condenser) non condensable gas discharged into the waste incineration system (U - 600). Then, using PC - 2002 regulation of circulating gas to control the 2D - 211 gas pressure. 2D - 211 is divided into two areas: water area and area of toluene. The inflow condensate is stratified in the aqueous phase, and the upper toluene flows toward the toluene zone. In the area of toluene by 2P toluene - 211A / B (2C - 210 column toluene reflux pump) sent out a road with 2FC - 2003 control from 2C - 210 back into the tower; another way with LC - 2003 to 2T - 202 regulation (toluene tank) level of toluene to control the volume of toluene for District% 50. The water in