Self-cleaning system for hydrophilicity and hydrophobicity analysis resin and cleaning method

An automatic cleaning and resin technology, applied in cleaning methods and utensils, cleaning methods using liquids, chemical instruments and methods, etc., can solve problems such as poor cleaning effect, cumbersome cleaning process, and poor cleaning airtight conditions, so as to avoid entry and exit The problem of water velocity difference, avoiding back-mixing and cut-off, and reducing the effect of discharge pollution

Inactive Publication Date: 2014-12-31
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional cleaning method is to wet-pack the resin to be cleaned, and alternately soak different cleaning solutions such as alkali, water, and acid in a downward flow through the cleaning solution delivery pump, in which the switching process of the cleaning solution and the control of the cleaning volume Both require manual operation. This cleaning method is limited by many problems such as cumbersome cleaning process, poor cleaning airtight conditions, and insufficient cleaning. The traditional method of manual cleaning of resin requires a lot of energy and time, and there will still be insufficient cleaning effect. best case

Method used

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  • Self-cleaning system for hydrophilicity and hydrophobicity analysis resin and cleaning method

Examples

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example 1

[0025] In this example, the resin to be cleaned is XAD-4 type resin produced by Rohm and Haas Company, the wet volume of the resin is 1L, and the cleaning column with the maximum scale of 1L is selected as the cleaning column. Mix the resin and pure water into the column so that the wet volume of the resin does not exceed the maximum scale line and the pure water level is at least 2cm higher than the stable surface of the resin sedimentation. After the column loading is completed, open the cleaning column check valve, start the cleaning liquid delivery pump to make the cleaning liquid flow rate 15L / h, and enter the cleaning stage at this time: open the solenoid valve-1, and 0.1M cleaning lye NaOH is delivered to the cleaning When the pH of the effluent of the cleaning solution is >12, the programmable controller starts timing. After 24 minutes, NaOH passes through 6L, the solenoid valve-1 is closed, and the solenoid valve-2 is opened, and the pure water is sent to the cleaning ...

example 2

[0027]In this example, the resin to be cleaned is XAD-8 resin produced by Rohm and Haas Company, the wet volume of the resin is 10 mL, and the cleaning column with a maximum scale of 10 mL is selected. Mix the resin and pure water into the column so that the wet volume of the resin does not exceed the maximum scale line and the pure water level is at least 2cm higher than the stable surface of the resin sedimentation. After the column loading is completed, open the cleaning column check valve, start the cleaning solution delivery pump to make the cleaning solution flow rate 30mL / h, and enter the cleaning stage: open the solenoid valve-1, and 0.1M cleaning lye NaOH is delivered to the cleaning When the pH of the effluent of the cleaning solution is >12, the programmable controller starts timing. After 12 minutes, 60mL of NaOH passes through, the solenoid valve-1 is closed, and the solenoid valve-2 is turned on, and the pure water is sent to the cleaning column. When the pH of th...

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Abstract

The invention relates to a self-cleaning system for a hydrophilicity and hydrophobicity analysis resin and a cleaning method, and belongs to the technical field of analysis resin cleaning. The self-cleaning system comprises a cleaning column, a PLC (programmable logic controller), an alkali liquor tank, an acid liquor tank, a pure water tank, a cleaning solution delivery pump, an on-line pH instrument and a waste liquor tank. An upward flow cleaning mode is adopted for the resin in the cleaning column; alternate cleaning is performed in a sequence of alkali, water, acid and water; electromagnetic valves are used for switching cleaning solutions and controlling the cleaning time of the different cleaning solutions; and water outlet of each cleaning solution is detected by the on-line pH instrument, if the concentration of the cleaning solution reaches the standard, feedback is performed to the PLC which starts timing for the cleaning solution, and the cleaning solution is switched until set time is over. In order to ensure that the cleaned resin is not exposed in the air, the cleaning water outlet is discharged in an overflow mode, and the cleaning waste liquor is discharged after thorough mixing and neutralization in the waste liquor tank, so that waste liquor pollution is reduced.

Description

technical field [0001] The invention belongs to the technical field of analyzing resin cleaning, and in particular relates to a resin used for analyzing and detecting the hydrophilicity and hydrophobicity of organic matter in a water body. The invention is an automatic cleaning system and a cleaning method for cleaning the special resin. Background technique [0002] Hydrophilicity and hydrophobicity analysis resin is used to detect the hydrophilicity and hydrophobicity of organic matter in water. Since this kind of resin is relatively expensive, the purpose of repeated use is usually achieved by cleaning the resin. The traditional cleaning method is to wet-pack the resin to be cleaned, and alternately soak different cleaning solutions such as alkali, water, and acid in a downward flow through the cleaning solution delivery pump, in which the switching process of the cleaning solution and the control of the cleaning volume Both require manual operation. This cleaning method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B3/04B08B3/08
Inventor 任家炜李星杨艳玲刘永旺周志伟臧振武
Owner BEIJING UNIV OF TECH
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