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Caprolactam aqueous solution energy-saving evaporation system and method

The technology of caprolactam and evaporation system is applied in the field of energy-saving evaporation system of caprolactam aqueous solution, which can solve the problems of large steam consumption, and achieve the effects of reducing usage, remarkable energy-saving effect and large operation flexibility.

Pending Publication Date: 2020-04-17
LIAOCHENG MEISI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional process adopts three-effect evaporation plus flash separation technology, which consumes a lot of steam

Method used

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  • Caprolactam aqueous solution energy-saving evaporation system and method
  • Caprolactam aqueous solution energy-saving evaporation system and method
  • Caprolactam aqueous solution energy-saving evaporation system and method

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Effect test

Embodiment 1

[0058] Such as figure 1 Shown, a kind of caprolactam aqueous solution energy-saving evaporation system comprises:

[0059] Preheater 16, for preheating caprolactam aqueous solution;

[0060] Falling film heater 5, its material inlet is connected with the material outlet of preheater 16, and its circulating hot water is the circulating hot water from rearrangement reactor 4;

[0061] Pre-evaporator 6, its material inlet is connected with the material outlet of falling film heater 5;

[0062] The first one-effect falling film heater 7, its material inlet is connected with the material outlet of pre-evaporator 6, and its bottom liquid outlet is connected with its top;

[0063] The first one effect evaporator 8, its material inlet is connected with the gas phase outlet of the first one effect falling film heater 7;

[0064] The second one-effect falling film heater 9, its material inlet is connected with the first one-effect falling film heater 7 liquid outlets, and its bottom ...

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PUM

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Abstract

The invention discloses a caprolactam aqueous solution energy-saving evaporation system and method, wherein the caprolactam aqueous solution energy-saving evaporation system comprises a preheater, a falling film heater, a pre-evaporator, a first first-effect falling film heater, a first first-effect evaporator, a second first-effect falling film heater, a second first-effect evaporator, a third first-effect falling film heater, a second-effect reboiler, a second-effect evaporator, a triple-effect reboiler and a triple-effect evaporator; a material inlet of the falling film heater is connectedwith a material outlet of the preheater, and circulating hot water is circulating hot water from a rearrangement reactor; a material inlet of the pre-evaporator is connected with a material outlet ofthe falling film heater; a material inlet of the first first-effect falling film heater is connected with a material outlet of the pre-evaporator, and a bottom liquid outlet is connected with the topof the first first-effect falling film heater; a material inlet of the first first-effect evaporator is connected with a gas phase outlet of the first first-effect falling film heater; an inlet of thesecond-effect reboiler is connected with a liquid outlet of the third first-effect falling film heater; a material inlet of the second-effect evaporator is connected with a material outlet of the second-effect reboiler; an inlet of the triple-effect reboiler is connected with a liquid outlet of the second-effect evaporator; and a material outlet of the triple-effect evaporator is connected with amaterial outlet of the triple-effect reboiler.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and in particular relates to an energy-saving evaporation system and method for an aqueous solution of caprolactam. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Caprolactam is an important organic chemical raw material. It is a monomer for the production of nylon-6 fiber (namely nylon) and nylon-6 engineering plastics. It can produce downstream products such as nylon plastics, fibers and L-lysine. The rearrangement unit caprolactam Refining is an important step in the production of caprolactam, which determines whether the quality of the caprolactam product is qualified or not, ...

Claims

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Application Information

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IPC IPC(8): B01D1/00B01D1/26B01D1/28B01D1/30
CPCB01D1/0088B01D1/26B01D1/2856B01D1/30
Inventor 耿维绪付衍胜蒋加新
Owner LIAOCHENG MEISI NEW MATERIAL TECH CO LTD
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