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Phenol steam injection vacuum system

A vacuum system and steam technology, used in jet pumps, steam/steam condensers, machines/engines, etc., can solve the problems of complex physical properties, high difficulty, low freezing point of phenol, etc., to achieve stable product quality, simple control, and consumption saving Effect

Inactive Publication Date: 2018-11-30
BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a phenol vapor injection vacuum system, which solves the disadvantages of low freezing point of phenol, complex physical properties, and great difficulty in applying to vacuum systems

Method used

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  • Phenol steam injection vacuum system

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Embodiment Construction

[0034] The technical solution of the present invention will be described in detail below with reference to the drawings and specific embodiments.

[0035] Such as figure 1 As shown, a phenol vapor jet vacuum system of the present invention is applied to a polycarbonate plant. In the system, the first-stage ejector 1, the first-stage condenser 5, the second-stage ejector 2, and the third-stage ejector 4. The third-stage condenser 7 is connected in sequence, and the second-stage B ejector 3 is connected to the second-stage condenser 6. The specific connection relationship is as follows:

[0036] Among them, the final polycondensation stream inlet N1 and the first-stage regulating steam inlet N4 of the final polycondensation reactor are connected to the suction port of the first-stage ejector 1, and the first-stage ejector 1 controls the vacuum degree of the final polycondensation reactor; The non-condensable gas outlet in the ejector 1 is connected to the lower inlet of the first-st...

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Abstract

The invention belongs to the technical field of polycarbonate devices, and particularly relates to a phenol steam injection vacuum system which is applicable to the polycarbonate devices. According tothe system, a first-level ejector 1, a first-level condenser 5, a second-level ejector 2, a third-level ejector 4 and a third-level condenser 7 are sequentially connected, and a second B-level ejector 3 is connected to a second-level condenser 6. The phenol steam injection vacuum system meets requirements in the polycarbonate production process, novel equipment with vacuum degrees needed by finalpolycondensation and pre-condensation reactors can be provided, the phenol steam injection vacuum system is reasonable in structural design and safe to use and can continuously and stably run, environmental pollution in the production process is low, and excellent-quality products can be produced by the polycarbonate devices.

Description

Technical field [0001] The invention belongs to the technical field of polycarbonate devices, and specifically relates to a phenol steam jet vacuum system. Background technique [0002] The vacuum system is a key component of the polycarbonate (PC) device, providing the vacuum environment required for the polycondensation reaction. There are currently ethylene glycol steam jet vacuum systems applied to polyester (PET) plants, and butanediol vapor jet vacuum systems applied to polybutylene terephthalate (PBT) plants. [0003] The above vacuum system can only be applied to specific devices, and can only provide the vacuum degree of the final polycondensation reactor, and the vacuum degree of the pre-polycondensation reactor needs to be provided by other equipment. [0004] At the same time, due to the large difference in the physical properties of the medium used in the vacuum system, especially the high freezing point of phenol, the development of the phenol vapor jet vacuum system i...

Claims

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Application Information

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IPC IPC(8): F04F5/20F04F5/44F04F5/46F28B7/00
CPCF04F5/20F04F5/44F04F5/46F28B7/00
Inventor 冯晨张宏宇王健顾学颖胡蓉李忠义韩学斌
Owner BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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