阅读说明：本技术 一种非接触式中空纤维膜渗透量的测量方法和装置 (Method and device for measuring permeation quantity of non-contact hollow fiber membrane ) 是由 张立志 郭欣 何奎 于 2019-10-25 设计创作，主要内容包括：本发明涉及一种非接触式中空纤维膜渗透量的测量方法,包括以下步骤,关闭风扇,在第一容器中加入热水,待中空纤维膜温度稳定后,清空第二容器并开始计时,经过时间段Δt后,对第二容器中的热水进行测量,获得无风渗透热水质量参数；启动风扇,待中空纤维膜温度稳定后,对中空纤维膜进行测量,获得中空纤维膜的温度参数；利用无风渗透热水质量参数和中空纤维膜的温度参数,求得热水在启动风扇测量过程中的总热量损失Q和对流传热量Q<Sub>对</Sub>；利用Q<Sub>潜</Sub>＝Q-Q<Sub>对</Sub>和<Image he="133" wi="192" file="DDA0002248405870000011.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>求得中空纤维膜渗透量W’。本方法可以测量单根中空纤维膜的渗透量,能够更好地探究中空纤维膜接触器在气扫式膜蒸馏过程中的放大效应。本发明还涉及一种非接触式中空纤维膜渗透量的测量装置。(The invention relates to a method for measuring the permeation quantity of a non-contact hollow fiber membrane, which comprises the following steps of turning off a fan, adding hot water into a first container, emptying a second container and starting timing after the temperature of the hollow fiber membrane is stable, and measuring the hot water in the second container after a time period delta t to obtain the quality parameter of windless permeated hot water; starting a fan, and measuring the hollow fiber membrane after the temperature of the hollow fiber membrane is stable to obtain the temperature parameter of the hollow fiber membrane; the total heat loss Q and the convection heat transfer Q of hot water in the process of starting the fan and measuring are obtained by utilizing the quality parameter of the windless permeating hot water and the temperature parameter of the hollow fiber membrane To pair (ii) a Using Q Diving ＝Q‑Q To pair And the hollow fiber membrane permeation amount W' was obtained. The method can measure the permeation quantity of a single hollow fiber membrane and can better explore the amplification effect of the hollow fiber membrane contactor in the gas swept membrane distillation process. The invention also relates to a device for measuring the permeation quantity of the non-contact hollow fiber membrane.)

1. A method for measuring the permeation quantity of a non-contact hollow fiber membrane is characterized by comprising the following steps: comprises the following steps of (a) carrying out,

adjusting the distance between the first container and the second container to enable the hollow fiber membrane to be in a horizontal straightening state, wherein the middle part of the hollow fiber membrane is opposite to the fan;

turning off the fan, adding hot water into the first container, emptying the second container and starting timing after the temperature of the hollow fiber membrane is stable, and measuring the hot water in the second container after a time period delta t to obtain a quality parameter of the windless permeable hot water;

starting a fan, and measuring the hollow fiber membrane after the temperature of the hollow fiber membrane is stable to obtain the temperature parameter of the hollow fiber membrane;

the total heat loss Q and the convection heat transfer Q of hot water in the process of starting the fan and measuring are obtained by utilizing the quality parameter of the windless permeating hot water and the temperature parameter of the hollow fiber membrane_{To pair}；

Using Q_Diving＝Q-Q_{To pair}Finding the latent heat Q_Diving；

By using

2. The method for measuring the permeation quantity of a non-contact hollow fiber membrane according to claim 1, wherein: the windless osmotic hot water quality parameter comprises the hot water quality m in the second container₁The obtaining steps are as follows,

turning off the fan, adding hot water into the first container, emptying the second container and starting timing after the temperature of the hollow fiber membrane is stable, weighing the mass of the hot water in the second container after a time period delta t, and obtaining the mass m of the hot water in the second container₁。

3. A method for measuring a permeation quantity of a hollow fiber membrane in a non-contact manner according to claim 2, wherein: the temperature parameters of the hollow fiber membrane include an inlet water temperature T_fin2Water temperature T at outlet_fout2Wall temperature T of inlet_min2And outlet wall temperature T_mout2The obtaining steps are as follows,

starting a fan, measuring the contact position of the outer wall of the hollow fiber membrane and the first container to obtain the inlet water temperature T after the temperature of the hollow fiber membrane is stable_fin2Measuring the contact position of the outer wall of the hollow fiber membrane and the second container to obtain the outlet water temperature T_fout2Measuring the front end of the outer wall of the hollow fiber membrane to obtain the temperature T of the inlet wall of the hollow fiber membrane_min2Measuring the tail part of the outer wall of the hollow fiber membrane to obtain the temperature T of the outlet wall_mout2。

4. A method for measuring a permeation quantity of a hollow fiber membrane in a non-contact manner according to claim 3, wherein: the total heat loss Q of the hot water during the start-up fan measurement is obtained as follows,

using m₁’＝m₁Method for obtaining windless mass flow rate m by using/delta t₁’；

Setting the qualitative temperature of the hot water to

using Q ═ Cm₁’(T_fin2-T_fout2) The total heat loss Q is determined.

5. A method for measuring a permeation quantity of a hollow fiber membrane in a non-contact manner according to claim 3, wherein: convective heat transfer Q during fan start-up measurement_{To pair}The steps for obtaining (a) are as follows,

measuring the current ambient temperature t₁From the current ambient temperature t₁Current density ρ of air is looked up_pViscosity [ mu ] of_pPrague number Pr of Planck_p(ii) a Setting the qualitative temperature of the hot water to

Using Re_p＝DU_pρ_p/μ_pDetermining Reynolds number Re of air around hollow fiber membrane_pWherein D is the outer diameter of the hollow fiber membrane, U_pIs the wind speed of the fan;

by using

By using

by usingObtaining A, wherein A isThe cross-sectional area of the hollow fiber membrane, d is the inner diameter of the hollow fiber membrane;

by using

By using

By using

by using

by using

by using

by usingObtaining the logarithmic mean temperature difference delta T;

using Q_{To pair}Get the pair as hA Δ THeat of flow Q_{To pair}。

6. The method for measuring the permeation quantity of a non-contact hollow fiber membrane according to claim 1, wherein: adjusting the distance between the first container and the second container comprises the following steps that the moving end of the tensile machine is detachably connected with the first container, the fixed end of the tensile machine is detachably connected with the second container, and the moving end of the tensile machine moves towards the direction far away from the fixed end to straighten the hollow fiber membrane.

7. A device for measuring the permeation amount of a non-contact hollow fiber membrane used in the measuring method according to any one of claims 1 to 6, characterized in that: the device comprises a first container, a hollow fiber membrane, a second container, a distance adjusting device, a fan, an infrared thermometer and a weighing device, wherein the first container is communicated with one end of the hollow fiber membrane, the other end of the hollow fiber membrane is communicated with the second container, the distance between the first container and the second container is adjusted through the distance adjusting device, and the hollow fiber membrane is horizontally arranged; the fan is positioned on one side of the hollow fiber membrane and faces the middle part of the hollow fiber membrane, the infrared thermometer is arranged corresponding to the hollow fiber membrane, and the weighing device is used for weighing the mass of the hot water permeating from the first container to the second container.

8. The non-contact type hollow fiber membrane permeation quantity measuring apparatus according to claim 7, wherein: the distance adjusting device comprises a tensile machine, the tensile machine is provided with a moving end and a fixed end, the moving end is detachably connected to the first container, and the fixed end is detachably connected to the second container.

9. The non-contact type hollow fiber membrane permeation quantity measuring apparatus according to claim 8, wherein: when the moving end of the tensile machine stops moving, the reading of the tensile machine is 0.2-0.4N.

10. The non-contact type hollow fiber membrane permeation quantity measuring apparatus according to claim 7, wherein: the wind path blown to the hollow fiber membrane by the fan is vertical to the extending direction of the hollow fiber membrane.