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Hollow fiber membrane separator and its running process

A separation device, fiber membrane technology, applied in the field of membrane separation

Inactive Publication Date: 2006-03-15
TIANJIN MOTIMO MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the deficiencies of the existing membrane device technology, and mainly solves the problem of perfect design of the membrane device pipeline and operation process

Method used

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  • Hollow fiber membrane separator and its running process
  • Hollow fiber membrane separator and its running process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The stock solution is ground water pre-filtered with 50 mesh. The membrane device includes three 6-inch polyvinylidene fluoride hollow fiber membrane modules (membrane filtration area of ​​150 square meters), PLC program controller, solenoid valve, pneumatic diaphragm valve, working water pump, backwash water pump, water tank and other pipe fittings, valves, etc. Parts are assembled according to the design scheme of the present invention. The membrane device is used as the pre-treatment of the reverse osmosis membrane device, and the water is purified and filtered according to the following procedures:

[0035] 1. Working status. Open the valves 4, 6, 7, 11, 14 and 19, and close the other valves; open and adjust the valves 1 and 2, so that the inlet working pressure P1 of the membrane module 21 is 0.20MPa, and the outlet pressure P2 of the membrane module 21 is 0.18MPa. The working time is 40 minutes. The filtrate flow rate is 20t / h.

[0036] 2. Cleaning status 1. ...

Embodiment 2

[0042] The stock solution is surface water pre-filtered with 50 mesh, BOD 8ppm, COD 10ppm, SS 5ppm. Membrane device and purposes thereof are the same as embodiment 1, carry out the purification and filtration of water according to the following procedures:

[0043] 1. Working status. Open valves 4, 6, 7, 11, 14 and 19, and close other valves; open and adjust valves 1 and 2, so that the inlet working pressure P1 of the membrane module 21 is 0.05MPa, and the outlet pressure P2 of the membrane module 21 is 0.03MPa. The working time is 30 minutes. The oxidant is added to the membrane stock solution system through a metering pump. The oxidizing agent is 10% sodium hypochlorite solution, and the concentration is 5 ppm. The filtrate flow rate is 10t / h.

[0044] 2. Cleaning status 1. Close the automatic valves 11, 14 and 19, open the automatic valves 12, 15, 16 and 17, open and adjust the valve 3, so that the flow of backwash liquid is 4t / h, and the reading of the gas flow meter ...

Embodiment 3

[0050] The stock solution is domestic sewage pre-filtered by 50 mesh, BOD30ppm, COD20ppm, SS10ppm. Membrane device and purposes thereof are the same as embodiment 1, carry out the purification and filtration of water according to the following procedures:

[0051] 1. Working status. Open the valves 4, 6, 7, 11, 14 and 19, and close the other valves; open and adjust the valves 1 and 2, so that the inlet working pressure P1 of the membrane module 21 is 0.2MPa, and the outlet pressure P2 of the membrane module 21 is 0.18MPa. The working time is 20 minutes. The oxidant is added to the membrane stock solution system through a metering pump, the oxidant is a chlorine solution, and the concentration is 9ppm. The filtrate flow rate is 10t / h.

[0052] 2. Cleaning status 1. Close the automatic valves 11, 14 and 19, open the automatic valves 12, 15, 16, 17 and 18, open and adjust the valve 3, so that the backwash flow is 3t / h, and the reading of the gas flowmeter 28 is 20Nm3 / h. The ...

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Abstract

The invention relates to a separating system with hollow fiber membranes and an operating method. A dual backwash loop which is a pipeline connecting a top port of the said membrane assembly to a cleaning pump through a first branch and a second branch. The first branch is designed to fill a small amount of cleaning liquid into the said membrane assembly; and the second branch is designed to fill a relatively large amount of cleaning liquid in order to clean the membrane adequately. The said system operates in the following procedures: operation status, cleaning status 1, cleaning status 2, drain status, returning to the operation status. The technology of the present invention may be used to enhance the cleaning effect to the membrane system, further save water for the cleaning process, shorten the cleaning time, thus benefiting the continuous large scale industrial production and having higher efficiency.

Description

technical field [0001] The invention relates to membrane separation technology, specifically an external pressure hollow fiber membrane separation device and its operating method. The international patent main classification number is intended to be Int.Cl 7 .BO1D 63 / 02, BO1D 65 / 02. Background technique [0002] Water is the source of life. With the improvement of living standards, on the one hand, people's requirements for drinking water are constantly increasing, so-called pure water, space water or purified water has entered people's daily life. On the other hand, production and industrial water, such as biochemical, pharmaceutical, food, seasoning and other fields, have higher and higher requirements for water purity. In recent years, people have developed microfiltration and ultrafiltration membrane technology for water purification, which is meeting this need and has achieved good practical results. Among them, external pressure hollow fiber membranes are most widel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/02B01D61/04B01D61/14B01D65/02C02F1/44
CPCB01D2313/083B01D61/04B01D2321/185B01D2321/2058B01D63/02B01D2321/16B01D2313/18B01D2311/04C02F1/444B01D61/14B01D65/02B01D2321/04B01D61/025B01D2311/12
Inventor 吕晓龙
Owner TIANJIN MOTIMO MEMBRANE TECH
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