CN105582814A - Hollow fiber ultrafiltration membrane silk pore distribution detecting device and method - Google Patents

Abstract

The invention relates to the technical field of fiber membrane silk detection, and discloses a hollow fiber ultrafiltration membrane silk pore distribution detecting device. The device comprises a water tank and a membrane silk positioning support. The two ends of a hollow fiber ultrafiltration membrane silk are fixed to the membrane silk positioning support. A row of hoppers are arranged on the membrane silk positioning support. The liquid outlet end of each hopper is correspondingly provided with a beaker. The diameters of the hollow fiber ultrafiltration membrane silk and all the hoppers are overlapped. The two ends of the hollow fiber ultrafiltration membrane silk are connected with a water pipe A and a water pipe B respectively. The water inlet end of the water pipe A and the water inlet end of the water pipe B are connected with the bottom of the water tank through a total water pipe. The connecting end of the water pipe A and the hollow fiber ultrafiltration membrane silk is connected with the top of the water tank through a backflow pipe. A pressure gauge A and a valve A are arranged on the water pipe A. A pressure gauge B and a valve B are arranged on the water pipe B. A total valve and a water pump are arranged on the total water pipe. Pure water is arranged in the water tank. The device has the advantage that the membrane aperture and pore distribution coefficient of the hollow fiber ultrafiltration membrane silk can be accurately measured.

Description

A kind of hollow fiber film yarn distribution of pores checkout gear and detection method

Technical field

The present invention relates to tunica fibrosa silk detection technique field, relate in particular to a kind of hollow fiber film yarn holeGap distribution detecting device and detection method.

Background technology

In recent years, along with the development of membrane technology, preparation method and the technique of film are constantly weeded out the old and bring forth the new. UltrafiltrationFilm is one of most widely used membrane technology, and membrane material and membrane module are of a great variety. Hyperfiltration membrane assembly kindMainly contain plate-type hyperfiltration membrane assembly, spiral wound membrane module, tubular ultrafiltration membrane module, capillary type ultrafiltrationMembrane module, polysulfone hollow fiber ultrafiltration membrane system. Polysulfone hollow fiber ultrafiltration membrane system is due to its unique adaptability knotStructure and become that the scope of application is the widest, the maximum hyperfiltration membrane assembly of consumption. International or domesticly all fill no matter beThe polysulfone hollow fiber ultrafiltration membrane system of scolding the very different hollow fiber film yarn of a large amount of qualities to make,The quality of polysulfone hollow fiber ultrafiltration membrane system performance depends primarily on the property of hollow fiber film yarn in assemblyCan, and film silk distribution of pores is one of important indicator characterizing its performance. The milipore filter of even pore distributionSilk everywhere pure water flux reach unanimity, like this antipollution energy ability of film more by force, more durable. DoughnutUltrafiltration membrane filaments distribution of pores coefficient i is an important finger for assessment of hollow fiber film yarn performanceMark, film silk distribution of pores assay method will be the indispensability of evaluating hollow fiber film thread performance, and lacks at presentSpecial equipment is for detection of hollow fiber film yarn distribution of pores coefficient.

Summary of the invention

The present invention to lack for accurately detecting hollow fiber film yarn hole and divides in order to solve in prior artThe device of cloth coefficient, provides a kind of membrane aperture, hole of energy Measurement accuracy hollow fiber film yarn to divideHollow fiber film yarn distribution of pores checkout gear and the detection method of cloth coefficient.

To achieve these goals, the present invention adopts following technical scheme:

A kind of hollow fiber film yarn distribution of pores checkout gear, comprises water tank, film silk locating support,The two ends of hollow fiber film yarn are fixed on film silk locating support, and described film silk locating support is provided withOne row's funnel, the outlet end of each funnel one by one correspondence is provided with beaker, the openend bore phase of all funnelsDeng and coplanar, the open end edge of adjacent funnel is tangent, described hollow fiber film yarn and all funnelsDiameter overlapping, the two ends of hollow fiber film yarn are connected with respectively water pipe A, water pipe B, described water pipeThe water inlet end of A, water pipe B is connected with water tank bottom by water-main, water pipe A and hollow fiber film yarnLink be connected with tank top by return duct, water pipe A is provided with Pressure gauge A, valve A, water pipe BBe provided with Pressure gauge B, valve B, described water-main is provided with total valve, water pump, is provided with pure water in water tank.

As preferably, described return duct is provided with return valve, and the bottom sides of described water tank is provided with emptyingPipe, evacuated tube is provided with exhaust-valve. Evacuated tube, exhaust-valve are emptying for water tank in clearing up water tank.

As preferably, described water pump is Miniature diaphragm pump. Miniature diaphragm pump can change rate-of flow, andAnd pressure stability.

As preferably, described pure water is reverse osmose pure-water or distilled water.

As preferably, the material of described water pipe A, water pipe B, water-main, return duct be PU material,One in UPVC material, SS material. These materials can not polluted pure water, make the data of measurement moreAccurately.

As preferably, label on the lateral wall of described beaker. Label, for mark beaker, is convenient to noteRecord data, in whole device, beaker is a lot, and in testing process, beaker need to repeatedly take out and put into,Prevent data record mistake.

As preferably, Pressure gauge A, Pressure gauge B range ability are 0MPa-0.6MPa. In testing process,The inside water pressure of hollow fiber film yarn need to be controlled within the scope of this, J and △ P in this pressure limitRelation in direct ratio.

A kind of hollow fiber film yarn distribution of pores detection method, comprises the following steps:

A, open total valve, valve B, return valve, shut off valve A, takes off beaker, starts water pump, 1-2minAfter, open valve A; Control valve A, valve B, equate the pressure of Pressure gauge A, Pressure gauge B, waits forAfter 5-10min, close total valve, be connected with the outlet end of funnel corresponding one by one labeled beaker;

B, open total valve, manual time-keeping simultaneously, the pressure value P of recording valve A, valve B, through △ tAfter time, timing finishes, and closes total valve, takes out beaker, measures the water yield in each beaker also with graduated cylinderRecord numerical value J;

C, open total valve, control valve A, valve B, make the numerical value of Pressure gauge A, Pressure gauge B simultaneouslyIncrease and equate, closing total valve, being connected with the outlet end leaking corresponding one by one labeled beaker,Repeating step b several times, obtain the data of some groups of beaker aquifer yield J and corresponding pressure P;

D, in plane right-angle coordinate, draw J-P relation curve according to the data that obtain in step c,To direct proportion coefficient k value, k=J/P, thus obtain the k value of each section of hollow fiber film yarn;

Utilize Hagen-Poise formulaTo calculate hollow fiber film yarn every with k=J/PThe average pore size of one section: $d=\sqrt{\frac{32\mathrm{\μ}\mathrm{\τ}J\mathrm{\Δ}x}{\mathrm{\ϵ}\mathrm{\Δ}P}};$

Wherein: J is membrane flux, △ P is transmembrane pressure, △ P=P, and △ x is wall thickness, d is fenestraFootpath, μ is liquid viscosity, and ε is the porosity on film surface, and τ is bend factor;

E, calculate the membrane flux J of every section of hollow fiber film yarn according to the data that obtain in step cMean value, from all mean value, find out maximum Jmax, minimum of a value Jmin, try to achieve hollow fiber ultrafiltration filmThe nonuniformity coefficient i of silk distribution of pores,

As preferably, hollow fiber film yarn first soaks by pure water before being fixed on film silk locating supportProcess soak time 12h-24h. Hollow fiber film yarn, through pure water immersion treatment, makes hollow fibreDimension ultrafiltration membrane filaments complete wetting reaches good detected state.

Therefore, the present invention has membrane aperture, the distribution of pores system of energy Measurement accuracy hollow fiber film yarnThe beneficial effect of number, can effectively assess hollow fiber ultrafiltration membrane according to membrane aperture, distribution of pores coefficientThe combination property of silk.

Brief description of the drawings

Fig. 1 is a kind of structural representation of the present invention.

Fig. 2 is the top view of film silk locating support.

In figure: water tank 1, film silk locating support 2, hollow fiber film yarn 3, funnel 4, beaker 5,Label 6, water pipe A7, water pipe B8, water-main 9, return duct 10, Pressure gauge A11, valve A12, pressurePower table B13, valve B14, total valve 15, water pump 16, pure water 17, return valve 18, evacuated tube 19,Exhaust-valve 20.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the invention will be further described:

A kind of hollow fiber film yarn distribution of pores checkout gear as shown in Figure 1, comprise water tank 1,Film silk locating support 2, the two ends of hollow fiber film yarn 3 are fixed on film silk locating support, film silkLocating support 2 is provided with row's funnel 4, and the outlet end of each funnel one by one correspondence is provided with beaker 5, beakerSide label 6, in the present embodiment, funnel one has ten, beaker is also ten, label dividesWei digital 1-10 not corresponding with ten beakers, as shown in Figure 2, the openend bore of funnel 4 equates and altogetherFace, the open end edge of adjacent funnel is tangent, the diameter weight of hollow fiber film yarn 3 and all funnelsFolded, the two ends of hollow fiber film yarn are connected with respectively water pipe A7, water pipe B8, water pipe A, water pipe BWater inlet end be connected with water tank bottom by water-main 9, water pipe A is connected with hollow fiber film yarnEnd is connected with tank top by return duct 10, and water pipe A is provided with Pressure gauge A11, valve A12, water pipeB is provided with Pressure gauge B13, valve B14, and water-main is provided with total valve 15, water pump 16, in water tank, establishesHave pure water 17, return duct 10 is provided with return valve 18, and the bottom sides of water tank is provided with evacuated tube 19, rowBlank pipe is provided with exhaust-valve 20. In the present embodiment: water pump is membrane pump, pure water is distilled water, water pipe A,The material of water pipe B, water-main, return duct is the one in PU material, UPVC material, SS material;Pressure gauge A, Pressure gauge B range ability are 0MPa-0.6MPa.

A kind of hollow fiber film yarn distribution of pores detection method, comprises the following steps:

A, hollow fiber film yarn be by pure water immersion treatment, soak time 12h-24h, then inHollow fiber ultrafiltration membrane filaments is installed to film silk locating support 2 according to the state shown in Fig. 2; Open total valve,Valve B, return valve, shut off valve A, takes off beaker, starts water pump, after 1-2min, opens valve A, therebyAir in hollow fiber film yarn is drained completely; Control valve A, valve B, make Pressure gauge A, pressureThe pressure of power table B equates, closes total valve, by a pair of labeled beaker one after wait 5-10minShould be connected with the outlet end of funnel;

B, open total valve, manual time-keeping simultaneously, the pressure value P of recording valve A, valve B, through △ tAfter time, timing finishes, and closes total valve, takes out beaker, measures the water yield J in each beaker with graduated cylinderAnd record numerical value;

C, open total valve, control valve A, valve B, make the numerical value of Pressure gauge A, Pressure gauge B simultaneouslyIncrease and equate, closing total valve, being connected with the outlet end leaking corresponding one by one labeled beaker,Repeating step b19 time, each △ t value all equates, obtains 20 groups of beaker aquifer yield J and corresponding pressure PData;

D, according to obtain in step c 20 groups of data, in plane right-angle coordinate, draw J-P relationCurve, obtains direct proportion coefficient k value, k=J/P, thus obtain in ten sections (corresponding one section of each funnels)The k value of hollow fiber ultrafiltration membrane filaments;

Utilize Hagen-Poise formulaTo calculate hollow fiber film yarn every with k=J/PThe average pore size of one section: $d=\sqrt{\frac{32\mathrm{\μ}\mathrm{\τ}J\mathrm{\Δ}x}{\mathrm{\ϵ}\mathrm{\Δ}P}};$

Wherein: J is membrane flux, △ P is transmembrane pressure, and △ x is wall thickness (known), and d is fenestraFootpath (to be measured), μ is liquid viscosity (known), and ε is the porosity (known) on film surface, and τ is bendingThe factor (known), because hollow fiber film yarn internal pressure is P, external pressure is 0, therefore △P＝P-0＝P；

E, to calculate the film of ten sections of hollow fiber film yarns according to obtain in step c 20 groups of data logicalThe mean value of amount J is found out maximum Jmax, minimum of a value Jmin from all mean value, tries to achieve hollow and surpassesThe nonuniformity coefficient i of filter membrane silk distribution of pores,

Come according to each section of membrane aperture d, the nonuniformity coefficient i that calculate the hollow fiber film yarn obtainingThe combination property of assessment hollow fiber film yarn.

Claims (9)

1. a hollow fiber film yarn distribution of pores checkout gear, is characterized in that, comprises water tank, filmSilk locating support, the two ends of hollow fiber film yarn are fixed on film silk locating support, and described film silk is fixedPosition support is provided with row's funnel, and the outlet end of each funnel one by one correspondence is provided with beaker, all funnelsOpenend bore is equal and coplanar, and the open end edge of adjacent funnel is tangent, described hollow fiber ultrafiltration membraneSilk is overlapping with the diameter of all funnels, and the two ends of hollow fiber film yarn are connected with respectively water pipe A, waterPipe B, the water inlet end of described water pipe A, water pipe B is connected with water tank bottom by water-main, water pipe A and inThe link of hollow fiber ultrafiltration membrane filaments is connected with tank top by return duct, and water pipe A is provided with Pressure gaugeA, valve A, water pipe B is provided with Pressure gauge B, valve B, and described water-main is provided with total valve, water pump,In water tank, be provided with pure water.

2. a kind of hollow fiber film yarn distribution of pores checkout gear according to claim 1, itsFeature is, described return duct is provided with return valve, and the bottom sides of described water tank is provided with evacuated tube, rowBlank pipe is provided with exhaust-valve.

3. a kind of hollow fiber film yarn distribution of pores checkout gear according to claim 1, itsFeature is that described water pump is Miniature diaphragm pump.

4. a kind of hollow fiber film yarn distribution of pores checkout gear according to claim 1, itsFeature is that described pure water is reverse osmose pure-water or distilled water.

5. a kind of hollow fiber film yarn distribution of pores checkout gear according to claim 1, itsFeature is, the material of described water pipe A, water pipe B, water-main, return duct is PU material, UPVC materialOne in matter, SS material.

6. a kind of hollow fiber film yarn distribution of pores checkout gear according to claim 1, itsFeature is, label on the lateral wall of described beaker.

7. according to a kind of hollow fiber film yarn described in claim 1 or 2 or 3 or 4 or 5 or 6Distribution of pores checkout gear, is characterized in that, described Pressure gauge A, Pressure gauge B range ability are0MPa-0.6MPa。

8. a hollow fiber film yarn distribution of pores detection method, is characterized in that, comprises the following steps:

A, open total valve, valve B, return valve, shut off valve A, takes off beaker, starts water pump, 1-2minAfter, open valve A; Control valve A, valve B, equate the pressure of Pressure gauge A, Pressure gauge B, waits forAfter 5-10min, close total valve, be connected with the outlet end of funnel corresponding one by one labeled beaker;

B, open total valve, manual time-keeping simultaneously, the pressure value P of recording valve A, valve B, through △ tAfter time, timing finishes, and closes total valve, takes out beaker, measures the water yield in each beaker also with graduated cylinderRecord numerical value J;

C, open total valve, control valve A, valve B, make the numerical value of Pressure gauge A, Pressure gauge B simultaneouslyIncrease and equate, closing total valve, being connected with the outlet end leaking corresponding one by one labeled beaker,Repeating step b several times, obtain the data of some groups of beaker aquifer yield J and corresponding pressure P;

D, in plane right-angle coordinate, draw J-P relation curve according to the data that obtain in step c,To direct proportion coefficient k value, k=J/P, thus obtain the k value of each section of hollow fiber film yarn;

Utilize Hagen-Poise formulaTo calculate hollow fiber film yarn every with k=J/PThe average pore size of one section:

Wherein: J is membrane flux, △ P is transmembrane pressure, △ P=P, and △ x is wall thickness, d is fenestraFootpath, μ is liquid viscosity, and ε is the porosity on film surface, and τ is bend factor;

E, calculate the membrane flux J of every section of hollow fiber film yarn according to the data that obtain in step cMean value, from all mean value, find out maximum Jmax, minimum of a value Jmin, try to achieve hollow fiber ultrafiltration filmThe nonuniformity coefficient i of silk distribution of pores,

9. a kind of hollow fiber film yarn distribution of pores detection method according to claim 8, itsFeature is, hollow fiber film yarn is fixed on before film silk locating support first by pure water immersion treatment,Soak time 12h-24h.