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Pressure-resistant organic-solvent-resistant pipe type molecular sieve membrane component and pervaporation separating process thereof

A technology resistant to organic solvents and molecular sieves, applied in semi-permeable membrane separation, membrane technology, chemical instruments and methods, etc.

Active Publication Date: 2015-02-18
NANJING TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a pressure-resistant and organic-solvent-resistant tubular molecular sieve membrane module and its pervaporation separation process, which adopts a new sealing material and sealing method to solve the problems of pressure resistance and organic solvent resistance of the pervaporation membrane module; At the same time, it also solves the problem of filling a large number of membrane tubes in the membrane module, and realizes the purpose of convenient and quick disassembly and replacement of the membrane module

Method used

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  • Pressure-resistant organic-solvent-resistant pipe type molecular sieve membrane component and pervaporation separating process thereof
  • Pressure-resistant organic-solvent-resistant pipe type molecular sieve membrane component and pervaporation separating process thereof
  • Pressure-resistant organic-solvent-resistant pipe type molecular sieve membrane component and pervaporation separating process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The assembly steps of the membrane module are as follows: figure 1 shown. The tubular molecular sieve membrane (4) passes through the perforated baffle (2), and the perforated baffle (2) is fixed in the shell (1) by the fixing rod (5), and the two ends of the fixing rod (5) are welded respectively The upper and lower ends of the shell (1) are fixed; the upper and lower ends of the tubular molecular sieve membrane (4) are respectively covered with O-shaped sealing rings (6), and after passing through the threaded hole (13), screw the hole bolt (7) Squeeze the O-ring (6) to fix the tubular molecular sieve membrane (4) in the casing (1); there is a seal between the casing (1) and the upper head (8a) and the lower head (8b). ring (9), the upper head is provided with a vacuum port (18), and the lower head (8b) is provided with a valve (12); use bolts (10) and nuts (11) to connect and compress the shell (1) and the upper The sealing head (8a) and the lower sealing head (8b)...

Embodiment 2

[0028] Select 226 tubular NaA molecular sieve membranes (belonging to LTA molecular sieve membranes) with an outer diameter of 12.8mm, an inner diameter of 7.8mm, and a length of 80cm, and pass the membrane tubes through 6 open-hole baffles with a diameter of 14mm in the shell and the threaded holes at both ends of the shell (the diameter of the inner layer of the thread is 14mm, and the inner diameter of the hole bolt is 14mm), and the two ends are covered with tetrafluoroethylene O-rings, and then the hole bolts are screwed, and the bottom of the thread hole is squeezed with the hole bolts. Press the O-shaped sealing ring to realize the sealing of the membrane tube; use the bolts and nuts to press the PTFE sealing ring between the head and the shell (90mm in diameter and 10cm in thickness) to form a vacuum chamber, forming Stainless steel membrane components. Close the valve at the lower end of the membrane module for the system pervaporation process. Under the condition of...

Embodiment 3

[0030]According to the method in Example 1, using polytetrafluoroethylene O-rings and sealing rings, 7 tubular T-type molecular sieve membrane tubes with an outer diameter of 12 mm and an inner diameter of 6 mm and a length of 50 cm are packaged in two open-hole folding tubes. Flow plate (aperture 13mm) stainless steel membrane module (among them, the threaded hole inner layer pore diameter is 13mm, hole bolt pore diameter is 13mm). Wherein, the diameter of the shell is 12 cm, and the thickness of the jacket is 1 cm. Using the material-liquid circulation mode, under the conditions of operating temperature of 115°C and operating pressure of 0.6MPa, two membrane modules were connected in series for the separation stability test of the vapor permeation of 96wt.% propionaldehyde / water system with strong solubility , During the test process, water is added to the raw material tank to maintain the water content of the raw material at about 4wt.%. The result is as image 3 As shown...

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Abstract

The invention provides a pressure-resistant organic-solvent-resistant pipe type molecular sieve membrane component and a pervaporation separating process of the pressure-resistant organic-solvent-resistant pipe type molecular sieve membrane component. The membrane component comprises a shell, a hole-opened baffling plate, a clamping sleeve, a pipe-type molecular sieve membrane, a fixed rod, an O-shaped sealing ring, a hole-opened bolt, an upper sealing head, a lower sealing head, a sealing ring, a bolt, a nut and a valve, wherein the molecular sieve membrane extrudes the O-shaped sealing ring to be fixed on a thread hole of the shell by the hole-opened bolt so as to achieve the purpose of isolating the front side of the membrane from the rear side of the membrane; and a vacuum chamber with a certain space is obtained by adopting a method for pressing the sealing ring between the sealing heads and the shell so as to realize the purpose of filling a large amount of membrane pipes into the membrane component. The membrane component provided by the invention is especially applicable to the pervaporation dewatering process of the organic solvent with stronger polarity, and simultaneously guarantees certain pressure resistance. In the pervaporation separating process, the mixed materials enter the shell from a to-be-separated material inlet and flow out from a to-be-separated material outlet after flowing through the surface of the molecular sieve membrane; and a heating medium flows into the clamping sleeve from a heating-medium inlet and flows out from a heating-medium outlet so as to heat the mixed materials.

Description

technical field [0001] The invention relates to the design of a tubular molecular sieve membrane module, in particular to a pressure-resistant organic solvent-resistant tubular molecular sieve membrane module and a pervaporation separation process thereof, belonging to the field of inorganic membranes. Background technique [0002] Pervaporation (steam permeation) is a new type of membrane separation technology, which uses the properties of different dissolution (adsorption) and diffusion rates of components in the separated liquid (or steam) mixture to achieve the purpose of separation. Its outstanding advantage is that it can achieve separation tasks that are difficult to complete by traditional methods such as distillation, extraction, and adsorption with low energy consumption, such as the separation of near-boiling and azeotropic systems. Compared with the azeotropic distillation technology in the traditional process, pervaporation technology has the advantages of high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/06B01D61/36
Inventor 顾学红仲超王学瑞尹良伟徐南平
Owner NANJING TECH UNIV