System and process for recycling rectification residual liquid generated based on methyl methacrylate

Abstract

The invention discloses a system and process for recycling a rectification residual liquid generated based on methyl methacrylate. The system comprises an intermittent distillation tower, a first pumpbody, a finished product storage tank, a vacuum adsorption pump, a residual liquid kettle, a cooling device, a rectification tank, a residual liquid pump, a cracking furnace and a fuel oil storage tank, the intermittent distillation tower is heated by steam, a finished product produced by methyl methacrylate after the distillation reaction is pumped into a finished product storage tank through afirst pump body in the intermittent distillation tower, the rectification residual liquid generated in the finished product storage tank is pumped into a residual liquid kettle through a vacuum adsorption pump to be stored, the cooling device can perform circulating water cooling on the intermittent distillation tower and the residual liquid kettle, rectifying residual liquid is cooled by the cooling device and then pumped into the rectifying tank to be stored, fuel oil is extracted from rectification raffinate generated by self resources through a cracking furnace to serve as fuel oil reserve, the recycling efficiency of the rectification raffinate is improved, self-circulation is achieved, and the method has the advantages of being high in recycling rate, quality and efficiency and continuous.

Description

technical field [0001] The invention relates to the field of recovery and reuse, and more specifically, to a rectification raffinate reuse system and process based on methyl methacrylate. Background technique [0002] In the production process of methyl methacrylate, domestic manufacturers will choose different rectification towers for production according to their own production processes. At present, there are two common operation methods: continuous rectification and batch rectification. Among them, continuous rectification is generally used for simple separation of components, while batch rectification is suitable for multi-component products. [0003] In actual production, the above two operation methods have their own strengths for different fields. However, for the rectification raffinate that some components need to be recycled, whether it is continuous rectification or batch rectification, it is difficult to meet the process requirements. ; and now the rectificatio...

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Problems solved by technology

[0004] In order to overcome the defects of the prior art, the rectification raffinate reuse system and process based on methyl methacrylate of the present invention solve the actual production in the technology. The above two operation modes have their own strengths for different fields. However, for the rectification raffinate that needs to be recycled for some components, whether it is continuous rectification or batch rectification, it is difficult to meet the process requirements; and the rectification raffinate with current technology is treated as hazardous waste; another On the one hand, the vaporized liquid rises rapidly in the distillation tower during the distillation process, and there is no effective barrier on the way, so that the rising speed is too fast, and the expected distillation effect cannot be achieved, which will adversely affect the quality of the product. In addition, the cooling water in the condenser installed in the residual liquid tank cannot be self-circulating, so that it cannot achieve the problem of rapid condensation

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