SU1699561A1 - Membrane member - Google Patents

Description

one

(21) 4400224/26

(22) 03/31/88

(46) 12/23/91. Bul Number 47

(71) Volgograd Polytechnic Institute

(72) A.B. Golovanchikov, V.P. Pishta, L.P. Kuznetsova S.P. Mishta,

V.A. Kozlovtsev, N.V. T bin and F.A. Moiseenko

(53) 66.066-278.002.2 (088.8)

(56) US Patent No. 3762566, cl. On 01 D 31/00, 1973.

(54) MEMBRANE ELEMENT

(57) The invention can be used in the selective separation of sewage and gas emissions from machine-building, metallurgical and other enterprises by micro-ultrafiltration. The purpose of the invention is to improve the performance of the element due to the turbulization of the mixture to be divided above the surface of the membrane. The element is made in the form of a drainage layer, a fleecy substrate and a semipermeable membrane. The ratio of the height of the pile elements protruding above the membrane surface to their thickness is 2.5-4.2. Under the action of a moving stream of liquid or gas, protruding substrate elements protruding above the surface of the semi-permeable membrane oscillatory movements, leading to turbulence in the separated flow over the entire surface of the membrane. The use of the proposed element for the separation of liquid and gas mixtures improves the performance of the separation process. 2 ill., 1 tab.

% V)

The invention relates to the chemical and petrochemical industry and can be used in the selective separation of wastewater and gas emissions from engineering, metallurgical and other enterprises by micro- and ultrafiltration.

The purpose of the invention is to improve the performance of the element due to the turbulence in the flow of the mixture being divided over the membrane surface.

FIG. 1 shows a diagram of the possible placement of membrane elements in the apparatus; in fig. 2 - membrane element, cross section.

The membrane element consists of a porous drainage layer 1, a substrate 2 having fuzzy elements 3, and a semipermeable membrane 4. The hairy elements protrude above the surface of the semipermeable membrane.

The element may have a tubular shape, may be made in the form of a flat plate. In the case of a tubular form, the membrane elements are placed in an apparatus consisting of a housing 5 with fittings 6 and 7 and a collector 8, which is provided with a fitting 9 for connection to a permeate collector.

O5 CO &

cl

15

20

The experimental data of the work of the unit for the separation of gas and liquid mixtures are presented in the table.

As can be seen from the table, under the same separation conditions: pressure, temperature, composition of the initial solution, the productivity of the process and the activity of the semipermeable membrane are approximately equal in the proposed devices to the known devices. However, with the passage of time, the selectivity and productivity of the apparatus according to the invention decreases more slowly than the well-known object. After 48 h, the performance of the proposed apparatus is 19.5- 32% more than that of the known.

An apparatus for separating liquid and gas mixtures operates as follows.

The separable mixture under working pressure is introduced into the housing 5 through the fitting 6 and fills it, washing the tubular membrane elements. Through the semipermeable membrane 4, 25 one of the components of the mixture to be separated occurs and gets inside the tubular element. Through the manifold 8, through the nozzle 9, the permeate is removed from the apparatus. Under the action of the flow of the mixture to be divided, the pile elements 3 of the knitted fabric 2 oscillate, which creates additional turbulization of the mixture being divided and thereby improves its mixing near the entire surface of the semi-permeable membranes. This prevents gelation and increases the productivity of the separation process.

Examples of manufacture are given to substantiate the optimal size of the pile elements.

thirty

35

40

Proposed

13

23

33 Known3

five

0

five

0

five

0

Example 1. For separating a glycerin in water solution, an apparatus for separating liquid and gas mixtures has membrane elements consisting of a knitted fabric with pile elements and a semi-permeable membrane deposited on its surface. Moreover, the ratio of the height of the pile elements protruding above the membrane surface to their thickness is 2.5. A semi-permeable cellulose nitrate barrier is used as the membrane.

Example 2. The apparatus according to Example 1, wherein the ratio of the height of the pile elements that go over the membrane surface to their thickness is 4.2.

Example 3. The apparatus of example 1, wherein the ratio of the height of the protruding pile elements to their thickness above the membrane surface is 3.4.

Claims (1)

Claims. A membrane element for the separation of liquid and gas mixtures, consisting of a drainage layer, a substrate and a semipermeable membrane, is required in order to improve the performance of the element due to the turbulization of the flow of the separable mixture above the membrane surface. knitted fabric containing pile elements protruding above the surface of the semi-permeable membrane, and the ratio of the height of the protruding part to the thickness is 2.5-4.2. 0.7 0.7 0.7 0.7 0.55 0.61 0.57 0.46 84 84 84 84 79 78 78 79  9 FIG