CN201144147Y - Palladium membrane element transferring heat with small scale channel - Google Patents
Palladium membrane element transferring heat with small scale channel Download PDFInfo
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- CN201144147Y CN201144147Y CNU2007200602389U CN200720060238U CN201144147Y CN 201144147 Y CN201144147 Y CN 201144147Y CN U2007200602389 U CNU2007200602389 U CN U2007200602389U CN 200720060238 U CN200720060238 U CN 200720060238U CN 201144147 Y CN201144147 Y CN 201144147Y
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- palladium
- membrane
- support frame
- film
- microscale channel
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Abstract
The utility model discloses a palladium membrane component by applying a small size channel to transmit heat; the component includes a membrane supporting framework, two porous metal supporting bodies and a palladium alloy membrane; the two porous metal supporting bodies and the palladium alloy membrane are respectively arranged at the two sides of the membrane supporting framework in turn; the membrane supporting framework comprises a purified hydrogen airflow channel for the to be purified and a small size channel; the small size channel is an air circulating channel used for heating which penetrates inside the membrane supporting framework and the section of the small size channel is a rectangle with a size of 0.2 to 1.0mm multiplied by 0.2 to 1.0mm; a channel inlet and an outlet connected with the small size channel are arranged on the membrane supporting framework; the hydrogen airflow channel arranged on the supporting body is in a rectangle tooth shape; an air educing opening is arranged at the upper end of the supporting framework; the component can fast raise the component of the palladium membrane component to the needed working temperature by utilizing the flowing heat transmission of a hot fluid in the small size channel, thus reducing the metal content of the palladium membrane component and further reducing the time for raising the temperature.
Description
Technical field
The utility model relates to purifying from synthetic gas produces the technology of high-purity hydrogen, particularly relates to a kind of palladium membrane component that microscale channel conducts heat of using.
Background technology
Present 90% hydrogen in the world comes from the reformation of hydrocarbon polymer (Sweet natural gas, coal, biomass etc.), chemical processes such as gasification or cracking, and the purification of synthetic gas is one of them crucial technological process.The available purification techniques has: transformation absorption, polymeric membrane separates, palladium (alloy) membrane sepn, low ternperature separation process etc.Compare with other isolation technique, the isolating service temperature of palladium alloy membrane higher (450-600 ℃) can be coupled with the synthetic gas production process, thereby break the molecular balance transformation efficiency, strengthens hydrogen yield, and shortened process reduces production unit; Palladium alloy membrane can be produced the high-purity hydrogen that only contains ppb rank impurity, especially adapts to the requirement of fuel cell; To be separated in the miniaturization aspect also easy than other several separation methods for palladium alloy membrane in addition.
So-called " dissolving-diffusion " (Solution-diffusion) mechanism is obeyed in the transmission of hydrogen in palladium alloy membrane, and it comprises following process: hydrogen is diffused into the palladium alloy membrane surface from the frictional belt; Hydrogen resolves into hydrogen atom on the film surface; Hydrogen atom is dissolved by palladium alloy membrane; Hydrogen atom is diffused into low-tension side from the high-tension side in palladium alloy membrane; Hydrogen atom synthesizes hydrogen molecule again in the palladium alloy membrane low-tension side; The film surface is left in the hydrogen diffusion.According to above-mentioned theory, the penetration coefficient of hydrogen in palladium alloy membrane and the temperature of film, thickness, alloying constituent, and hydrogen is relevant in the dividing potential drop of film both sides, and available Sievert ' s law expresses:
In the formula:
R: gas law constant; T: temperature; A: membrane area; L: film thickness; E: activation energy; P
h: hydrogen high-tension side dividing potential drop; P
l: hydrogen low-tension side dividing potential drop; N: pressure index; K: coefficient before the exponential function; M: transmitance.
In the palladium alloy membrane assembly, except the palladium alloy membrane of separating hydrogen gas, also be useful on the supporter of pressure-bearing, be generally materials such as porous ceramics or sintered stainless steel.But because the resistance to pressure of pottery, vibration resistance is all poor, and the thermal expansivity of palladium alloy membrane and stupalith have bigger difference, palladium alloy membrane breakage easily in actual use.On the other hand, if adopt common stainless steel supporter (not being with microscale channel to conduct heat), the palladium alloy membrane assembly is unfavorable for using in the distributed hydrogen gas production of the small-scale that needs frequent starting be warmed up to the needed time of working temperature oversize (above 3 hours) by room temperature.
The utility model content
The purpose of this utility model is to overcome the shortcoming of prior art, and a kind of effective shortening palladium alloy membrane assembly start time is provided, and uses the palladium membrane component that microscale channel conducts heat.
The utility model purpose is achieved through the following technical solutions:
A kind of palladium membrane component of using the microscale channel heat transfer, comprise film support frame, porous metal supporter and palladium alloy membrane, two porous metal supporters and palladium alloy membrane are positioned at the both sides that contain the film support frame respectively successively, described film support frame includes and is cleaned hydrogen gas flow passage and microscale channel, described microscale channel is the circulation passage of gas that navigates within a heating usefulness of film support frame inside, its cross section is a rectangle, sectional dimension 0.2-1.0 millimeter * 0.2-1.0 millimeter, the feeder connection of connection microscale channel and outlet are located at and contain on the film support frame; Hydrogen gas flow passage is a rectangular toothed on the supporter, and the gas export mouth is arranged on the support frame upper end, is communicated with gas channel.
For further being realizes the utility model purpose, described rectangular toothed hydrogen gas flow passage width is the 3-5 millimeter, and the width of the film support frame between the passage is the 3-5 millimeter.
Described support frame is that stainless steel is made.
Described support frame and sintering metal supporter 4 adopt and are welded to connect.
Described palladium alloy membrane adopts the palladium-silver alloy film, and the thickness of film is the 10-50 micron.
Take the method for metal diffusing to be tightly connected together between described alloy film and metallic support framework and the sintering metal supporter.Or adopt flange by pressure sealing together between described alloy film and metallic support framework and the sintering metal supporter 4 with the edge of palladium alloy membrane and metallic support framework.
The utility model compared with prior art has following advantage:
(1) utilize the flowing heat transfer of hot-fluid in microscale channel can make the palladium alloy membrane assembly be warming up to needed working temperature (being generally 450-600 ℃) fast;
(2) existence of small scale heat exchanger channels has reduced the metal content of palladium alloy membrane assembly, has further reduced the heating-up time;
(3) utilize thickness to be low to moderate 10 microns palladium alloy membrane, the separating high-purity hydrogen of can purifying, and the hydrogen transmitance is big.
Description of drawings
Fig. 1 uses the structural representation of the palladium membrane component of microscale channel heat transfer for the utility model;
Fig. 2 be among Fig. 1 A-A to sectional view;
Fig. 3 be among Fig. 1 B-B to sectional view;
Fig. 4 uses synoptic diagram for palladium alloy membrane.
Embodiment
Below in conjunction with accompanying drawing and specific examples the utility model is described further.Need to prove, the example of being lifted, its effect just further specifies technical characterictic of the present utility model, rather than limits the utility model.
As Figure 1-3, a kind of palladium membrane component of using the microscale channel heat transfer, comprise film support frame 1, porous metal supporter 4 and palladium alloy membrane 5, two porous metal supporters 4 and palladium alloy membrane 5 are positioned at the both sides that contain film support frame 1 respectively successively, film support frame 1 includes and is cleaned hydrogen gas flow passage 2 and microscale channel 3, this microscale channel 3 is the circulation passage of the gas of a heating usefulness navigating within film support frame 1 inside, its cross section is a rectangle, sectional dimension 0.2-1.0 millimeter * 0.2-1.0 millimeter, the feeder connection 6 and the outlet 7 that connect microscale channel 3 are located at the both sides that contain on the film support frame 1; Hydrogen gas flow passage 2 is two symmetric rectangular toothed combinations on the supporter, and passage width is the 3-5 millimeter, and the film support frame between the passage, width are the 3-5 millimeter, and gas export mouth 8 is arranged on support frame 1 upper end, is communicated with gas channel 2.Support frame 1 adopts stainless steel, and porous metal supporter 4 adopts the sintering metal stainless steel.Support frame 1 adopts with sintering metal supporter 4 and is welded to connect.Palladium alloy membrane 5 adopts the palladium-silver alloy film, and the thickness of film is the 10-50 micron.Can take the method for metal diffusing to be tightly connected together between alloy film 5 and metallic support framework 1 and the sintering metal supporter 4, this method is that this assembly is placed under the high temperature and high pressure environment, make the molecule of palladium film alloy and the molecule of metallic support framework spread mutually, thereby palladium alloy membrane closely is attached to support frame, also can be with the edge of palladium alloy membrane and metallic support framework together by pressure sealing with flange.
During work, at first in microscale channel 3, feed high-temperature gas, utilize high-temperature gas flowing in microscale channel 3 to conduct heat, make its intensification to support frame 1 by microscale channel inlet 6, after high-temperature gas conducts heat and finishes, flow out microscale channel 3 by exporting 7.When temperature rises to the temperature (being generally 450-600 ℃) that the palladium film can work, this palladium membrane component is placed the high-pressure atmosphere of the synthetic gas of hydrogen, hydrogen in the synthetic gas will penetrate palladium alloy membrane 5 by diffusion, and then pass sintered porous metal 5 and enter and be cleaned gas flow passage 2, final by gas export mouth 8 outflow palladium membrane components, become highly purified product hydrogen.
Palladium membrane component in the utility model utilizes the flowing heat transfer of hot-fluid in microscale channel can make the palladium alloy membrane assembly be warming up to needed working temperature 450-600 ℃ fast; And the existence of small scale heat exchanger channels reduced the metal content of palladium alloy membrane assembly, further reduced the heating-up time; Palladium membrane component also utilizes thickness to be low to moderate 10 microns palladium alloy membrane, the separating high-purity hydrogen of can purifying, and the hydrogen transmitance is big.
Processing palladium alloy membrane assembly as shown in Figures 1 and 2, its concrete size can be: stainless steel frame employing thickness is 6.3 millimeters 304 stainless steels, long 165 millimeters, wide 76 millimeters, the microscale channel cross section is 0.5 millimeter * 0.5 millimeter, film support adopts 316 sintered porous stainless steels, be of a size of millimeter (wide) * 1.2,127 millimeters (length) * 64 millimeter (thick), film support is centrally placed in the support frame surface, cladding thickness is palladium (75% quality) silver (25% quality) alloy film of 25 microns on it, and film is of a size of 76 millimeters * 140 millimeters.The hydrogen circulation passage width is 0.5 millimeter in the support frame.Hydrogen outlet, heated air entrance and exit all adopt the cutting ferrule pipe of Φ 6.
As shown in Figure 4, this palladium membrane component 12 is placed a pressurized vessel 11 that is provided with the sealing of admission port 9 and relief outlet 10, heated air inlet 6, outlet 7 and hydrogen outlet 8 are drawn pressurized vessel 11 by the flange of pressurized vessel 11.Heated air adopts 700 ℃ high-temperature flue gas, and flow 10 standard liter/min 6 enter in the palladium membrane component 12 from entering the mouth, and discharge palladium membrane components 12 from exporting 7, can in 30 minutes the palladium alloy membrane assembly be preheating to 550 ℃.In normal operation, the volumetric molar concentration of hydrogen is controlled at 30% in synthetic gas in the container 11,550 ℃ of gas temperatures, pressure 2.0MPa, then see through palladium alloy membrane assembly 12, the productive rate that exports 8 hydrogen of discharging from the hydrogen body can reach 2.5 liters/minute, and the purity of hydrogen is greater than 99.999%.
Claims (7)
1, a kind of palladium membrane component of using the microscale channel heat transfer, comprise the film support frame, porous metal supporter and palladium alloy membrane, two porous metal supporters and palladium alloy membrane are positioned at the both sides that contain the film support frame respectively successively, it is characterized in that, described film support frame includes and is cleaned hydrogen gas flow passage and microscale channel, described microscale channel is the circulation passage of gas that navigates within a heating usefulness of film support frame inside, its cross section is a rectangle, sectional dimension 0.2-1.0 millimeter * 0.2-1.0 millimeter, the feeder connection of connection microscale channel and outlet are located at and contain on the film support frame; Hydrogen gas flow passage is a rectangular toothed on the supporter, and the gas export mouth is arranged on the support frame upper end, is communicated with gas channel.
2, the palladium membrane component of application microscale channel heat transfer according to claim 1 is characterized in that described rectangular toothed hydrogen gas flow passage width is the 3-5 millimeter, and the width of the film support frame between the passage is the 3-5 millimeter.
3, the palladium membrane component that conducts heat of application microscale channel according to claim 1 is characterized in that described support frame (1) makes for stainless steel.
4, the palladium membrane component of application microscale channel heat transfer according to claim 1 is characterized in that described support frame (1) and sintering metal supporter (4) employing are welded to connect.
5, the palladium membrane component of application microscale channel heat transfer according to claim 1 is characterized in that described palladium alloy membrane adopts the palladium-silver alloy film, and the thickness of film is the 10-50 micron.
6, the palladium membrane component of application microscale channel heat transfer according to claim 1 is characterized in that taking the method for metal diffusing to be tightly connected together between described alloy film and metallic support framework and the sintering metal supporter.
7, the palladium membrane component that conducts heat of application microscale channel according to claim 1 is characterized in that employing flange between described alloy film and metallic support framework and the sintering metal supporter with the edge of palladium alloy membrane and metallic support framework by pressure sealing together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200602389U CN201144147Y (en) | 2007-11-28 | 2007-11-28 | Palladium membrane element transferring heat with small scale channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200602389U CN201144147Y (en) | 2007-11-28 | 2007-11-28 | Palladium membrane element transferring heat with small scale channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201144147Y true CN201144147Y (en) | 2008-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200602389U Expired - Fee Related CN201144147Y (en) | 2007-11-28 | 2007-11-28 | Palladium membrane element transferring heat with small scale channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201144147Y (en) |
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2007
- 2007-11-28 CN CNU2007200602389U patent/CN201144147Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081105 Termination date: 20121128 |