Integrated tubular ceramic oxygen permeating membrane separation reactor

A tubular membrane, one-piece technology, applied in the field of ceramic oxygen-permeable membrane oxygen separation reactors, can solve problems such as being unsuitable for large-scale industrial applications, difficult to solve for sealing and component connection, and small in membrane configuration and filling area. Efficiency and practicability, strong creativity and practicability, compact and reasonable structure

Active Publication Date: 2014-02-26
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, sheet-type and flat-plate membranes are not suitable for large-scale industrial applications. On the one hand, due to the small packing area, large membrane thickness, and small oxygen flux per unit area of ​​this type of membrane configuration, on the other hand, in the membrane reaction In the device, it is difficult to fill the catalyst in a large area, and the sealing and component connection under high temperature conditions are also difficult to solve, which is a fatal bottleneck restricting its large-scale application.

Method used

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  • Integrated tubular ceramic oxygen permeating membrane separation reactor
  • Integrated tubular ceramic oxygen permeating membrane separation reactor
  • Integrated tubular ceramic oxygen permeating membrane separation reactor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] figure 1 Schematic diagram of the structure of an integrated tubular ceramic oxygen-permeable membrane separation reactor. The membrane module and the heating furnace together constitute an integrated tubular ceramic oxygen-permeable membrane separation reactor. The main part of the membrane reactor assembly is sequentially composed of the first support plate 1A, the spring 2, the moving tube plate 3, the fixed tube plate 4, and the second support plate 1B through four corundum tube guide rails 5 combined in series. The tubular ceramic membrane 6 is placed between the moving tube plate 3 and the fixed tube plate 4, and the gas inlet and outlet operations are realized through the gas collection chamber cover 7 and the connecting pipe 8. The whole membrane assembly is placed in the tubular resistance furnace 9, wherein except part of the membrane tubes and guide rods are in the heating zone of the resistance furnace (consisting of insulation cotton 10 and resistance wire...

Embodiment 2

[0039] The reactor is placed in a tubular heating furnace, and the fixed tube sheets and moving tube sheets at both ends and the sealing part are all outside the heating zone of the heating furnace. Sealant 704 silicone rubber sealant, this kind of sealant has a maximum temperature resistance of 250°C, a long-term maximum service temperature of 200°C, and excellent high temperature resistance. Use this as an indicator to determine the distance between the tube sheet (sealed part) and the heating zone of the heating furnace to ensure the sealing quality and the utilization rate of the membrane tube. Image 6 It is the axial temperature distribution curve of the non-heating zone at different center temperatures of the tube furnace. Depend on Image 6 It can be seen that with the increase of the temperature in the heating center of the tube furnace, the temperature of the furnace mouth also rises accordingly, while the axial temperature outside the furnace decreases rapidly with...

Embodiment 3

[0041] Different from the normal temperature tubular membrane equipment, the device in the present invention is in a high temperature environment (>500°C), and some devices are also in a normal temperature environment. Components in a high-temperature environment will inevitably cause large expansion or contraction during the heating and cooling process, and there will be a large difference in thermal expansion performance between components and components in a normal temperature environment. If the problem caused by material expansion cannot be effectively solved Poor stress will greatly endanger the structural stability of the membrane module, and even cause the rupture of the membrane tube, the leakage of flammable gas and the danger of explosion. In this embodiment, the thermal expansion performance of each component in a high temperature environment is tested, Figure 7 It is the thermal expansion curve of different rail materials and membrane tube materials, assuming tha...

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Abstract

The invention relates to an integrated high-temperature tubular membrane separation reactor. The reactor is formed by sequentially serially combining supporting plates, a spring, a movable tube plate, a membrane tube and a fixed tube plate through four guide rails and a fixing device and arranged in a tubular electric furnace to form the integrated membrane separation reactor. A tubular ceramic membrane is arranged in placement holes in the fixed tube plate and the movable tube plate which are positioned at two ends and sealed by using a high-temperature sealant. The sealed part is positioned outside a heating area of a heating furnace. The movable tube plate is a component capable of moving along the guide rails, and is used for effectively dredging axial expansion of the membrane and a membrane assembly in the heating and cooling process. The reactor is reasonable in design, compact in structure and wide in application, and breaks through the conventional design concept; and the efficiency and the practicability of the reactor are greatly improved. The reactor is suitable for tubular membranes of multiple structures, breaks through the limitation that the conventional oxygen separation membrane reactor can only be applied to pure oxygen separation, can be applied to preparation of pure oxygen, and can also be applied to a membrane reaction process.

Description

technical field [0001] The invention relates to an integrated high-temperature tubular membrane separation reactor. Specifically, it relates to a ceramic oxygen-permeable membrane oxygen separation reactor which utilizes a ceramic oxygen-permeable membrane to separate oxygen in the air at a high temperature for oxygen separation, and can simultaneously utilize the oxygen permeating through the membrane to carry out a membrane reaction. technical background [0002] The mixed conductor membrane material is an inorganic ceramic membrane material that can simultaneously conduct electrons and oxygen ions (Teraoka et al., Chem. Lett., 1985), and is widely used in pure oxygen preparation, fuel cells, sensors, membrane reactors, etc. fields. Utilizing its 100% selectivity for oxygen ions, it can be used to produce high-purity oxygen (>99%), and at the same time, the mixed conductor membrane material has higher oxygen flux. Compared with the oxygen production methods currently ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/22B01D71/02B01J12/00
Inventor 金万勤张广儒姜威徐南平
Owner NANJING TECH UNIV
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