A system device that effectively reduces energy consumption in polymerization rectification and improves operational stability
A technology of operation stability and system installation, which is applied in the chemical industry to achieve the effects of reducing production costs, increasing operational flexibility and stability, and reducing production costs
Active Publication Date: 2018-09-04
SINOPEC CHANGCHENG ENERGY CHEM NINGXIA CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to provide a rectification system device that reduces the energy consumption of the polymerization rectification unit, improves the internal quality of polyvinyl alcohol products, and operates stably in view of the shortcomings of the existing polyvinyl alcohol polymerization production system process
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[0016] The specific embodiment of the invention is combined with the attached figure 1 And attached figure 2 for further description
[0017] A system device that effectively reduces the energy consumption of polymerization rectification and improves operational stability. The system device includes: 1-feeding methanol storage tank, 2-feeding VAC storage tank, 3-initiator storage tank, 4-polymerization one Kettle A—E, 5-condenser for one polymerization kettle, 6-resin pump for one kettle for polymerization, 7-second kettle for polymerization A—E, 8-condenser for two kettles, 9-resin pump for two kettles for polymerization, 10-one tower for polymerization A---E, 11-polymerization first tower distillation condenser, 12-polymerization first tower distillation tank, 13-polymerization first tower distillation pump, 14-polymerization first tower still pump, 15-PVAC storage tank, 16- Polymerization tower 2, 17-polymerization tower 2 distillation condenser, 18-polymerization tower ...
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The invention provides a system with the effects of effectively reducing polymerization rectification energy consumption and improving operational stability, belonging to the field of the chemical industry. The system comprises the following main devices: a polymerization tower I distillate intermediate tank, a polymerization tower II charge pump, a reused liquid storage tank, a densimeter, a reused liquid pump, a citric acid storage tank, a polymerization tower I charge pump, a polymerization tower II and a polymerization tower II charge preheating pump, wherein the devices are connected with each other for feeding. The system has the beneficial effects that partial methanol solvents and partial VAC (vinyl acetate) monomers not subjected to polymerization reaction can be directly reused to continuously produce PVAC (polyvinyl acetate), thus reducing separation and purification of partial methanol solvents and partial VAC monomers not subjected to polymerization reaction, substantially reducing the energy consumption of a polymerization rectification system and a recovery tower III, and improving the operating flexibility and stability of polymerizing different loads of polyvinyl alcohols and producing different models of polyvinyl alcohols.
Description
technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a system device for effectively reducing energy consumption of polymerization and rectification and improving operation stability. Background technique [0002] Polyvinyl alcohol is a very unique water-soluble polymer. It has many excellent basic properties, which makes it very widely used in real life. Polyvinyl alcohol has good solubility and viscosity. Its aqueous solution is transparent and has good adhesion. It is not only soluble in water, but also soluble in polar solutions containing hydroxyl groups (glycerol, ethylene glycol, acetic acid, acetaldehyde, etc.). Polyvinyl alcohol is miscible with starch, plastics, synthetic resins, cellulose derivatives and various surfactants and has good stability. At the same time, polyvinyl alcohol can be regarded as a linear polymer with secondary hydroxyl groups. The secondary hydroxyl groups in the molecule have high ac...
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IPC IPC(8): C08F18/08C08F6/12C08J11/02C08L31/04
CPCC08F6/12C08J11/02C08J2331/04C08L31/04
Inventor 唐玉林郭会军王海涛郎永福
Owner SINOPEC CHANGCHENG ENERGY CHEM NINGXIA CO LTD