CN202916158U

CN202916158U - Membrane shell for monitoring microorganism pollution of RO/NF (reverse osmosis/nanofiltration) membrane on line

Info

Publication number: CN202916158U
Application number: CN 201220408265
Authority: CN
Inventors: 翟葆光
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-17
Filing date: 2012-08-17
Publication date: 2013-05-01
Anticipated expiration: 2022-08-17

Abstract

The pressure loss of single membrane element in a membrane shell is monitored on line through the structural improvement of the conventional membrane shell by utilizing the technical feature that the pressure loss of the first membrane element at the water inlet end in the membrane shell is remarkably higher than that of other membrane elements when the membrane elements are biologically polluted. An opening is formed in the joint of the membrane elements in the membrane shell on a barrel body of the conventional shell membrane, and pressure monitoring equipment is connected at the opening to monitor the pressure of the end parts of the membrane elements in the separated membrane shell at the opening on line and obtain the change data of the pressure loss of the single membrane element directly related with biological pollution.

Description

A kind of RO/NF membrane micro pollutes the on-line monitoring putamina

Technical field

The utility model relates to a kind of RO/NF membrane micro and pollutes the on-line monitoring putamina.

Background technology

Recurrent system of microbial contamination counter-infiltration and nanofiltration (RO/NF) film system operation troubles, because of its be difficult to monitor, can't its generation of Accurate Prediction and the trend of development, be difficult to effectively control and clean and recover extremely difficult, be regarded as " cancer " of counter-infiltration and NF membrane always.For counter-infiltration and the microbial contamination of the NF membrane system perfect solution of neither one also, the common recognition of industry is at present, the key of corresponding microbial contamination is to find as early as possible the generation of polluting and accurately grasps the situation of polluting development, could in time take to add like this germifuge, improve the control measure such as pre-service and in time contaminated system is effectively cleaned, therefore reliable accurately on-line monitoring method just becomes the gordian technique that just becomes control counter-infiltration and the microbial contamination of NF membrane system.The common counter of counter-infiltration and NF membrane system performance on-line monitoring is Pressure Drop and water production rate, and after pollute occuring, because runner and film surface portion stop up, Pressure Drop can increase and water production rate can descend.But because similar phenomenon all can occur after occuring in various pollution, so can't accurately judge the situation of microbial contamination.

In academic research and system fault diagnosis practice, adopted several different methods to monitor counter-infiltration and NF membrane system microbes contamination, relatively commonly used have ATP analysis, a total plate count analysis etc., but these class methods can only be the lab analysis of off-line, can't be used for on-line monitoring.

Compare with other types contamination phenomenon such as Organic Pollution, foulings, the characteristics of counter-infiltration and the microbial contamination of NF membrane system are, the points of contamination that occurs at first is first membrane component of film system water inlet end, polluting development until outburst biological membrane when seriously stopping up intake tunnel, the pollution load more than 90% still concentrates on first membrane component of water inlet end.Carry out independent on-line monitoring if can prop up to the list in the water inlet end putamina pressure loss of membrane component, will obtain the important related information of microbial contamination genesis, but because the limitation of traditional putamina design can't be installed simple equipment and data acquisition system (DAS).

Summary of the invention

In order realizing propping up the membrane component pressure loss with the closely-related list of microbial contamination genesis and carry out independent on-line monitoring in the RO/NF film system water inlet end putamina, to the invention provides a kind of RO/NF membrane micro and pollute the on-line monitoring putamina.

The technical scheme that the utility model solves counter-infiltration and NF membrane system biological pollution on-line monitoring is: the pressure loss of interior first the membrane component of water inlet end of putamina increases meeting obviously greater than this technical characterictic of other membrane components when utilizing the biological pollution that membrane component occurs, and realizes the on-line monitoring of single the membrane component pressure loss in the putamina by traditional putamina being carried out architecture advances.

Described RO/NF membrane micro pollutes the on-line monitoring putamina, its architectural feature is for to open 1-5 hole at the stack shell 1 of traditional shell, 1-2 hole opened in recommendation, the connecting portion of position of opening membrane component in putamina, be recommended in the terminal position of first membrane component 4 of water inlet end and second membrane component 5, at tapping Bonding pressure monitoring equipment, such as direct-reading tensimeter, pressure transducer or differential manometer, the pressure of on-line monitoring tapping putamina inner membrance member end head position obtains the list directly related with biological pollution and props up membrane component pressure loss delta data.

Utilize described RO/NF membrane micro to pollute the on-line monitoring putamina as follows to Monitoring Data and the computing method thereof of the pressure loss of single membrane component in the putamina:

1) pressure loss Δ P of first membrane component of water inlet end ₁₁The increase ratio of comparing with initial value;

2) first the membrane component pressure loss of water inlet end added value Δ P ₁₁Account for first paragraph putamina pressure loss Δ P ₁The ratio Δ P of added value ₁₁/ Δ P ₁

3) first the membrane component pressure loss of water inlet end added value Δ P ₁₁With second membrane component pressure loss of water inlet end added value Δ P ₁₂Ratio Δ P ₁₁/ Δ P ₁₂

The calculating of the pressure loss:

ΔP ₁＝P _f-P ₁；

ΔP ₁₁＝P ₀-P ₁₁；

ΔP ₁₂＝P ₁₁-P ₁₂；

Wherein:

P _f, system's water inlet end pressure equals first membrane component water inlet end pressure;

P ₁, pressure between system segment, the i.e. dense water end (W.E.) pressure of first paragraph putamina;

P ₁₁, the dense water end (W.E.) pressure of first membrane component of water inlet end;

P ₁₂, the dense water end (W.E.) pressure of second membrane component of water inlet end;

Δ P ₁, the first paragraph putamina pressure loss;

Δ P ₁₁, first membrane component pressure loss of water inlet end;

Δ P ₁₂, second membrane component pressure loss of water inlet end.

Description of drawings:

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is the first embodiment view that the RO/NF membrane micro pollutes the on-line monitoring putamina;

Fig. 2 is the second embodiment view that the RO/NF membrane micro pollutes the on-line monitoring putamina.

Embodiment:

The utility model the first embodiment, as shown in Figure 1.Wherein, 1 putamina, first membrane component terminal pressure of 2 water inlet ends monitoring equipment, such as direct-reading tensimeter, pressure transducer or differential manometer, first membrane component of 4 water inlet ends, the dense water end (W.E.) pressure monitoring devices of 6 first paragraph putaminas, 7 first paragraph putamina water inlet end pressure monitoring devices.

First membrane component terminal position opened a hole on diffusion barrier shell 1, and pressure monitoring device 2 directly is connected on tapping.Utilize the pressure P of first membrane component end of water inlet end in 2 pairs of putaminas of pressure monitoring device ₁₁On-line monitoring compares with 7 first paragraph putamina water inlet end pressure monitoring devices reading Pf, directly observes Δ P ₁₁Situation of change.

The utility model the second embodiment, as shown in Figure 2, wherein, 1 putamina; 2,3 be respectively first of water inlet end, second membrane component terminal pressure monitoring equipment, such as direct-reading tensimeter, pressure transducer or differential manometer, 4,5 be respectively first of water inlet end, second membrane component, the dense water end (W.E.) pressure monitoring devices of 6 first paragraph putaminas, 7 first paragraph putamina water inlet end pressure monitoring devices.

First membrane component end and second membrane component terminal position are opened two holes on putamina 1, and pressure monitoring device 2,3 is connected with tapping.The pressure P of first membrane component 4 of water inlet end and second membrane component 5 end in the online acquisition putamina ₁₁And P ₁₂, online acquisition 7 first paragraph putamina water inlet end pressure monitoring devices and the dense water end (W.E.) pressure checking device of 6 first paragraph putaminas reading P _fAnd P ₁, monitoring Δ P ₁₁/ Δ P ₁₂Situation of change, contrast simultaneously Δ P ₁₁/ Δ P ₁Ratio and Δ P ₁₂/ Δ P ₁Situation of change.

Claims

1. a RO/NF membrane micro pollutes the on-line monitoring putamina, its architectural feature is for to open 1-5 hole at the stack shell of traditional putamina, the connecting portion of position of opening membrane component in putamina, at tapping Bonding pressure monitoring equipment, described pressure monitoring devices is direct-reading tensimeter, pressure transducer or differential manometer, the pressure of on-line monitoring tapping putamina inner membrance member end head position.