二乙烯苯提纯设备

Abstract

本实用新型公开了二乙烯苯提纯设备，包括依次通过耐腐蚀管道密封连接的原料预处理单元、精馏单元、吸附单元和产品收集单元，各单元之间的管道上均设有截止阀。该二乙烯苯提纯设备采用三级提纯工艺，原料预处理单元可去除90％以上的不溶性杂质，精馏单元通过优化的塔板结构和操作参数，对沸点差异≥5℃的杂质分离效率可达95％以上，吸附单元对微量杂质的吸附率≥99％，最终产品纯度稳定达到99.5％以上，收率提高至85％以上。精馏单元采用精准的温度和压力控制，通过智能温控装置实现加热功率的动态调节，与传统蒸馏设备相比，能耗降低30％‑40％；同时，保温层的设置减少了热量损失，进一步降低了能量消耗。

Claims

1. A divinylbenzene purification apparatus, characterized by: It includes a raw material pretreatment unit (1), a distillation unit (2), an adsorption unit (3) and a product collection unit (4) that are sequentially sealed and connected by corrosion-resistant pipes. Each pipe between the units is equipped with a shut-off valve. The raw material pretreatment unit (1) includes a mixing tank (101), the top of which is provided with a raw material inlet (106) and a solvent inlet (107), and the inside is provided with a stirring device (102). The bottom is connected to a filter (103) through a pipe, and the outlet of the filter (103) is connected to a distillation unit (2). A flow meter (104) and a regulating valve (105) are installed on the pipe between the mixing tank (101) and the filter (103). The distillation unit (2) consists of a distillation column (201). A reboiler (202) is located at the bottom of the distillation column (201), connected to the bottom of the column via a pipe to form a circulation loop. A circulation pump (209) is installed on the circulation pipe. A feed inlet (208) is located in the middle of the distillation column (201), connected to the outlet of the filter (103) of the raw material pretreatment unit (1). A distributor is located at the feed inlet (208). The distillation column (201) contains 30-50 sieve trays. The top of the column (201) is equipped with a condenser (203), the outlet of which is connected to a reflux tank (204). The reflux tank (204) is connected to the top of the distillation column (201) as reflux liquid and to the adsorption unit (3) via pipes. A reflux pump (210) and a reflux regulating valve (211) are installed on the reflux pipe. A pressure sensor (205) and a temperature sensor (206) are also installed at the top of the distillation column (201). The reboiler (202) is equipped with an intelligent temperature control device (207). The adsorption unit (3) includes an adsorption column (301), which is filled with an adsorbent. Quartz sand pads are provided at both ends of the adsorbent. The top of the adsorption column (301) is connected to the outlet of the reflux tank (204) of the distillation unit (2), and the bottom is connected to the product collection unit (4). The adsorption column (301) is equipped with an inlet and outlet concentration monitoring device (302) and an observation window (303). The product collection unit (4) consists of a collection tank (401). The top of the collection tank (401) is connected to the bottom of the adsorption column (301) of the adsorption unit (3). The top of the collection tank (401) is equipped with a breather valve (404) and a pressure gauge (405), and the bottom is equipped with a discharge valve (402). A liquid level sensor (403) is installed inside the tank.

2. The divinylbenzene purification apparatus of claim 1, wherein: The mixing tank (101) is made of 316L stainless steel and has an effective volume of 100-500L. The internal stirring device (102) includes a stirring motor (1021), a stirring shaft (1022), and a three-layer blade stirring paddle (1023). The diameter of the stirring paddle (1023) is 0.6-0.7 times the inner diameter of the mixing tank (101), and the speed can be adjusted within the range of 50-300r / min.

3. The divinylbenzene purification apparatus of claim 1, wherein: The filter (103) is a bag filter with a filtration accuracy of 1-5μm and a removable polypropylene filter bag inside; the flow meter (104) is an electromagnetic flow meter with a measurement accuracy of ±0.5%; and the regulating valve (105) is a pneumatic regulating valve with an adjustment accuracy of ±1%.

4. The divinylbenzene purification apparatus of claim 1, wherein: The distillation column (201) has a height of 5-15m, an inner diameter of 300-800mm, and is wrapped with a 50-100mm thick aluminum silicate cotton insulation layer. The spacing between the internal sieve plates is 250-350mm, the aperture of the sieve plates is 3-5mm, and the opening rate is 10%-15%.

5. The divinylbenzene purification apparatus of claim 1, wherein: The reboiler (202) is a column tube heat exchanger with a heat exchange area of 5-20 m 2 , and the heating medium is heat conducting oil; the condenser (203) is a horizontal shell tube heat exchanger with a heat exchange area of 8-25 m 2 , and the cooling medium is cooling water.

6. The divinylbenzene purification apparatus of claim 1, wherein: The adsorption column (301) has a height of 2-5m and an inner diameter of 200-500mm. The adsorbent is granular activated carbon with a particle size of 2-5mm. The filling height is 2 / 3-3 / 4 of the column height. The inlet and outlet concentration monitoring device (302) is an online ultraviolet spectrophotometer with a measurement accuracy of ±0.001AU.

7. The divinylbenzene purification apparatus of claim 1, wherein: The collection tank (401) has a volume of 1-5 m 3 The liquid level sensor (403) is an ultrasonic liquid level meter with a measuring range of 0-3 m and an accuracy of ±1 mm. When the liquid level reaches the set upper limit, the outlet valve of the adsorption unit (3) is automatically closed.

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