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Method for cleaning filter element of polyester prepolymer filter

A filter and prepolymer technology, which is applied in filter regeneration, chemical instruments and methods, filtration separation, etc., can solve problems such as fast scrapping time, shortened service life, improper process selection, etc., and achieve ideal cleaning effect and prolong The effect of service life

Inactive Publication Date: 2015-04-01
TONGKUN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past, prepolymers were usually cleaned with triethylene glycol: heavy pollution and poor environment; at the same time, the process flow was not properly selected, and the service life of the filter element after cleaning was significantly shorter than that of the new filter element, and the scrapping time was very fast

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0010] The cleaning method of the polyester prepolymer filter element described in this embodiment, in the first step, the filter element is placed in a hydrolysis furnace for hydrolysis treatment, the furnace temperature is 325°C, the steam temperature is 325°C, and the steam flow rate is 80- 100Kg / h, the temperature of the connecting pipe is 300°C, the flow rate of washing water is 1000Kg / h, and the hydrolysis time is 40h; in the second step, the filter element after hydrolysis treatment is rinsed with a high-pressure water gun, and the rinse water is desalinated water, and the high-pressure water gun The flushing pressure is 5MPa; the third step is to put the filter element after high-pressure flushing in the alkali tank, the concentration of alkali water in the alkali tank is 15%, and the alkali washing time is 10h; the fourth step is to process the finished filter element in the third step The filter element is washed and soaked in the washing tank, and the temperature in ...

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Abstract

The invention relates to the field of the cleaning method of polyester prepolymer filters, and particularly relates to a method for cleaning a filter element of a polyester prepolymer filter. The method comprises the steps of firstly, carrying out hydrolysis treatment; secondly, washing by using a high-pressure water gun; thirdly, soaking in an alkaline tank; fourthly, washing and soaking in a washing tank; fifthly, washing by using the high-pressure water gun again; sixthly, carrying out secondary hydrolysis; seventhly, repeating the steps three, four and five sequentially; eighthly, carrying out ultrasonic cleaning; ninthly, repeating the steps three, four and five sequentially; tenthly, carrying out ultrasonic cleaning again; and eleventhly, carrying out bubble detecting. According to the method for cleaning the filter element of the polyester prepolymer filter, residual polymers in the filter element are degraded by hydrolysis at high-temperature and alkaline conditions, and residues are removed by cleaning via high-temperature water, washing by using the high-pressure water gun and cleaning by using ultrasonic waves, so that multiple times of recycling of the filter element are realized. Residual polymers in the filter element are degraded by adopting a hydrolysis technology for the process, and pollution and obvious peculiar smell do not exist on the site in operation.

Description

technical field [0001] The invention relates to the field of cleaning methods for polyester prepolymer filters, in particular to a cleaning method for filter cores of polyester prepolymer filters. Background technique [0002] Due to factors such as the introduction of impurities in the raw materials and side reactions in the polymerization device, aggregated particles (particles with a size ≥ 10 μm) will be produced, which will easily cause broken ends when they enter the product during spinning. Therefore, in the polyester production process Increase the agglomerated particles in the prepolymer filter to filter the material. The prepolymer filter also needs to be switched from time to time according to the pressure difference between the front and rear. Each switch needs to be discharged first, and the switch starts after the prepolymer discharge reaches the standard, and then the switched filter element needs to be cleaned. [0003] The cleaning process determines the qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D41/04
Inventor 肖顺立钱国华冯志忠
Owner TONGKUN GRP
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