CN201400568Y - Palladium membrane hydrogen separation device based on high-temperature preheating - Google Patents
Palladium membrane hydrogen separation device based on high-temperature preheating Download PDFInfo
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- CN201400568Y CN201400568Y CN2009200533496U CN200920053349U CN201400568Y CN 201400568 Y CN201400568 Y CN 201400568Y CN 2009200533496 U CN2009200533496 U CN 2009200533496U CN 200920053349 U CN200920053349 U CN 200920053349U CN 201400568 Y CN201400568 Y CN 201400568Y
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- palladium membrane
- gas circulation
- membrane component
- palladium
- blind flange
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model discloses a palladium membrane hydrogen separation device based on high-temperature preheating; a plurality of palladium membrane components are arranged between two blind flanges, synthesis gas flowing frames which are square frames and has a cavity in the middle are arranged between the blind flange and the palladium membrane component and between the two palladium membrane components; a closed space is formed by the square frame and the blind flange or the palladium membrane component, a convex plate, a high-temperature air lead-in pipe, a lead-out pipe and a high-temperature air flowing channel are arranged at the periphery of the synthesis gas flowing frame; the cross section of the high-temperature air flowing channel is round, and the diameter is 3-5mm, or the cross section of the high-temperature air flowing channel is rectangle, and the length of the side is 3-5mm. The palladium membrane hydrogen separation device leads high-temperature flue gas to be led inthe air flowing channel of the synthesis gas flowing frame to preheat and constantly heat a membrane separator, the temperature rising speed is rapid and the temperature controlling effect is good, and the device is particularly combined with a device for discharging a high-temperature tail gas, and the energy utilization efficiency is improved.
Description
Technical field
The utility model relates to a kind of membrane separation unit that is used for separating, producing from hydrogenous synthetic gas high-purity hydrogen, particularly relates to the preheating of employing high-temperature gas, constant temperature, is easy to heating, temperature control effect membrane separation unit preferably.This device can be produced highly purified hydrogen from hydrogeneous gas mixture.
Technical background
Present 90% hydrogen in the world comes from the reformation of hydrocarbon polymer (Sweet natural gas, coal, biomass etc.), obtains through purifying after the 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 membrane sepn, low ternperature separation process etc.Compare with other isolation technique, the palladium membrane sepn can be produced the high-purity hydrogen that only contains ppb rank impurity, especially adapts to the requirement of fuel cell; The occupation of land of palladium membrane separation unit is little in addition, and is also easy than other several separation methods aspect miniaturization.
So-called " dissolving-diffusion " (Solution-diffusion) mechanism is obeyed in the transmission of hydrogen in the palladium film, and it comprises following process: hydrogen is diffused into palladium film surface from the frictional belt; Hydrogen resolves into hydrogen atom on the film surface; Hydrogen atom is dissolved by the palladium film; Hydrogen atom is diffused into low-tension side from the high-tension side in the palladium film; Hydrogen atom stresses newly to synthesize hydrogen molecule at the palladium film at low pressure; The film surface is left in the hydrogen diffusion.According to above-mentioned theory, the penetration coefficient of hydrogen in the palladium film and the temperature of film, thickness, alloying constituent, and hydrogen is relevant in the dividing potential drop of film both sides, and available Sieverts ' 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.
The using palladium membrane sepn is produced hydrogen and need be carried out under the working temperature of palladium film, the method that the palladium membrane separation apparatus is heated up has following several mode, as passing through some microscale channels of processing on palladium membrane component, adopt electrically heated or hot-fluid heating by these microscale channels, this method temperature rise rate is very fast, and can carry out good temperature control, but the processing microscale channel there is certain degree of difficulty on palladium membrane component.Scatter and disappear and to place thermal insulation material in the outside of palladium membrane component for the temperature that prevents palladium membrane component in addition, as pottery etc.Then can heat by its accessory part membrane separation apparatus, this type of heating processing is simple relatively, uses more convenient.
Chinese invention patent application " a kind of membrane separation unit of producing high-purity hydrogen " (application number: 200810199114.8) disclose a kind of membrane separation unit of producing high-purity hydrogen, comprised palladium membrane component, synthetic gas circulation framework, blind flange, Graphite pad, joint bolt and nut; Between two blind flanges, be provided with a plurality of palladium membrane components, be provided with synthetic gas circulation framework between blind flange and the palladium membrane component and between palladium membrane component and the palladium membrane component, reach between synthetic gas circulation framework and the palladium membrane component between blind flange and the synthetic gas circulation framework Graphite pad is installed; Synthetic gas circulation framework is a quadra, and the centre is a cavity; Quadra and blind flange or palladium membrane component form the space of sealing, are provided with hydrogen containing synthesis gas at synthetic gas circulation framework and import and delivery line, and importing and delivery line are communicated with the gas communication space of palladium membrane component; Around synthetic gas circulation framework, be provided with boss.But the preheating of this device or constant temperature need be realized by the high temperature inert gas that flows through synthetic gas circulation framework or the heat of high temperature hydrogen containing synthesis gas itself.
Chinese invention patent application " a kind of electrical pre-heating and homothermic are produced the membrane separation unit of high-purity hydrogen " (application number: 200810218798.1) disclose a kind of membrane separation unit that adopts electrically heated to produce high-purity hydrogen, this device is provided with a plurality of palladium membrane components between two blind flanges, be provided with the synthesizer way circulation frame between blind flange and the palladium membrane component and between palladium membrane component and the palladium membrane component, reach between synthetic gas circulation framework and the blind flange between blind flange and the synthetic gas circulation framework Graphite pad is installed; Synthetic gas circulation framework is a quadra, and the centre is a cavity; Quadra and blind flange or palladium membrane component form the space of sealing, are provided with hydrogen containing synthesis gas at synthetic gas circulation framework and import and delivery line; Be provided with boss around synthetic gas circulation framework, wall is provided with groove, is provided with electrical heating wire in the groove, and the outside of electrical heating wire is provided with insulating heat insulating material.This device comes preheating or thermostat(t)ing diaphragm separator by electrically heated, is fit to the laboratory scale practicality.Use for heavy industrialization, utilize first-chop electric energy to heat or the thermostat(t)ing diaphragm separator is relatively wasted the high-quality energy.The technical scale process for making hydrogen generally has high-temperature flue gas to produce, and utilizing high-temperature flue gas to come preheating or thermostat(t)ing diaphragm separator is a feasible selection.
The utility model content
The utility model is at the hydrogen containing synthesis gas that makes in the Chemical Manufacture, with the palladium membrane component is major parts, be heated to be main type of heating with high-temperature gas, provide a kind of and be fit to have the high-temperature flue gas preheating and keep homothermic palladium membrane separation unit, improve efficiency of energy utilization.
Main embodiment of the present utility model is as follows:
A kind of palladium membrane hydrogen separation device based on high temperature preheating, between two blind flanges, be provided with a plurality of palladium membrane components, be provided with synthetic gas circulation framework between blind flange and the palladium membrane component and between palladium membrane component and the palladium membrane component, reach between synthetic gas circulation framework and the palladium membrane component between blind flange and the synthetic gas circulation framework Graphite pad is installed; Described blind flange is a square plate; All around be respectively equipped with groove with palladium membrane component with the one side that synthetic gas circulation framework is connected at blind flange, be provided with graphite gasket in the groove, the boss of synthetic gas circulation framework and the groove on blind flange and the palladium membrane component are tightly connected; Described synthetic gas circulation framework is a quadra, and the centre is a cavity; Quadra and blind flange or palladium membrane component form the space of sealing, are provided with hydrogen containing synthesis gas at synthetic gas circulation framework and import and delivery line, and the cavity that importing and delivery line and the synthetic gas of palladium membrane component circulate in the framework is communicated with; Around synthetic gas circulation framework, be provided with boss, high-temperature gas ingress pipe, delivery line and high-temperature gas circulation passage; The channel cross-section of described high-temperature gas circulation passage is circular, and its diameter is the 3-5 millimeter, and the channel cross-section of perhaps described high-temperature gas circulation passage is a rectangle, and the length of side is the 3-5 millimeter.
For further realizing the utility model purpose, the film support frame both sides of described palladium membrane component have porous sintered metal supporter and palladium alloy membrane respectively, the film support frame contains and is cleaned the hydrogen gas stream circulation passage, this passage is two symmetric rectangular toothed combinations, passage width is the 3-5 millimeter, support frame between the passage is the 3-5 millimeter, and the gas export mouth is arranged on support frame two ends up and down, is communicated with gas channel; Process a rectangular recess that is used for synthetic gas circulation frame seal around the described film support frame, the wide 3-7 millimeter of described groove, dark 1-3 millimeter.
Open circular hole, bolting when being used to assemble on around the described blind flange.
It is rectangular recess that described blind flange is respectively equipped with groove all around with the one side that palladium membrane component is connected with synthetic gas circulation framework, and described recess width is that 3-7 millimeter, the degree of depth are the 1-3 millimeter.
The boss width of described synthetic gas circulation framework is than the narrow 0.3-0.7 millimeter of the width of the groove of blind flange and palladium membrane component, and height is identical with the depth of groove of blind flange and palladium membrane component.
The rectangle packing ring of described graphite gasket for being made by resistant to elevated temperatures graphite, width is identical with the width of the groove of blind flange and palladium membrane component, thick 0.3-0.5 millimeter.
After the assembling of palladium membrane separation apparatus finished, the outside coated lagging material to reduce heat lost by radiation.Lagging material is selected pyroceram fibre or other materials for use, and material thickness is to guarantee that the lagging material hull-skin temperature is not higher than 10 ℃ of envrionment temperatures and calculates definite.
In the utility model separator is adopted the high-temperature gas heating, temperature rise rate is very fast, and temperature is easy to control, is specially adapted to the application scenario of high-temperature tail gas discharging.
Description of drawings
The make a living membrane separation unit assembly drawing of production of high purity hydrogen of Fig. 1.
Fig. 2 is the partial enlarged drawing of Fig. 1.
Fig. 3 partly cuts open figure for palladium membrane component.
Fig. 4 is a palladium membrane component A-A sectional view among Fig. 3.
Fig. 5 is a palladium membrane component B-B sectional view among Fig. 3.
Fig. 6-1 is synthetic gas circulation framework right view.
Fig. 6-2 is Fig. 6-1 synthetic gas circulation framework D-D sectional view.
Fig. 6-3 is Fig. 6-2 synthetic gas circulation framework C-C sectional view.
Fig. 7-1 is the blind flange structural representation.
Fig. 7-2. be Fig. 7-1 blind flange structure E-E sectional view.
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 shown in Figure 1, 2, a kind of palladium membrane hydrogen separation device based on high temperature preheating comprises palladium membrane component 1, synthetic gas circulation framework 2, blind flange 3, graphite gasket 4, bolt and nut 5, high-temperature gas circulation passage 204.Between two blind flanges 3, be provided with a plurality of palladium membrane components 1, be provided with synthetic gas circulation framework 2 between blind flange 3 and the palladium membrane component 1 and between palladium membrane component and the palladium membrane component, with synthetic gas circulation framework 2 both are separated, for keeping sealing, reach between synthetic gas circulation framework and the palladium membrane component between blind flange and the synthetic gas circulation framework Graphite pad is installed.The quantity of palladium membrane component can decide according to geometrical dimensions such as the area of required hydrogen output, the operational condition of separator (temperature, pressure etc.), palladium film, thickness.If the quantity of the needed palladium membrane component of whole device is N, the quantity of then needed synthetic gas circulation framework is N+1, and the quantity of Graphite pad is 2N+2, and blind flange quantity is 2.For to the membrane separation apparatus heating, feed high-temperature gas in the high-temperature gas circulation passage 204 around synthetic gas circulation framework.Synthetic gas circulation framework, palladium membrane component, blind flange are fixed by joint bolt and nut 5.
Shown in Fig. 3～5, palladium membrane component 1 comprises film support frame 101, porous sintered metal supporter 105, palladium alloy membrane 106 and hydrogen delivery line 104.Film support frame 101 both sides have porous sintered metal supporter 105 and palladium alloy membrane 106 respectively, film support frame 101 contains and is cleaned hydrogen gas stream circulation passage 102, this passage is two symmetric rectangular toothed combinations, passage width is the 3-5 millimeter, preferred 4 millimeters, the support frame between the passage is the 3-5 millimeter, preferred 4 millimeters, gas export mouth 104 is arranged on support frame, and about in the of 101 two ends, are communicated with gas channel 102.Support frame 101 adopts stainless steel, and porous sintered metal supporter 105 adopts sintered stainless steel.Adopt between support frame and the sintering metal and be welded to connect.Palladium alloy membrane 106 adopts the palladium-silver alloy film, and the thickness of film is the 10-50 micron, adopts 25 microns palladium-silver alloy film herein.Adopt the method for metal diffusing to be tightly connected together between palladium alloy membrane 106 and metallic support framework 101 and the porous sintered metal supporter 105, this method is as under the high temperature and high pressure environment with this assembly, make the molecule mutual diffusion mutually of molecule with metallic support framework 101 of palladium alloy membrane 106, thereby reach the effect of sealing.Machined grooves 103 around the film support frame 101, wide is the 3-7 millimeter, preferred 5 millimeters is the 1-3 millimeter deeply, preferred 1 millimeter; During assembling, the 0.4 millimeter width that adds thickness in the groove 103 is 5 millimeters a Graphite pad 4, docks (Fig. 2) with the boss 203 of synthetic gas circulation framework 2.
Shown in Fig. 6-1,6-2,6-3, synthetic gas circulation framework 2 is a stainless steel square gap frame C, and middle is that cavity, wall are a rectangular recess.After the installation, with the blind flange of its both sides and the space 201 of palladium membrane component formation sealing, synthetic gas can flow in this space.Import and delivery line 202 in synthetic gas circulation framework 2 two ends welding hydrogen containing synthesis gas, importing and delivery line 202 are communicated with gas communication space 201.Process wide 4.5 millimeters, high 1 a millimeter boss 203 in the framework both sides, be used for sealing when synthetic gas circulation framework 2 is installed combination with palladium membrane component 1 or blind flange 3 (Fig. 2).Process cross section and be used for preheating and constant temperature to membrane separation apparatus for circular high-temperature gas circulation passage 204 around synthetic gas circulation framework 2, its diameter is the 3-5 millimeter, preferred 5 millimeters.The channel cross-section of this high-temperature gas circulation passage 204 also can be rectangle, and the length of side can be the 3-5 millimeter.Being provided with of high-temperature gas circulation passage 204 is beneficial to the heating of employing high-temperature gas, and temperature rise rate is very fast, and temperature is easy to control, is specially adapted to the application scenario of high-temperature tail gas discharging.
Shown in Fig. 7-1,7-2, blind flange 3 is a square stainless steel plate 301, and thickness is 15 millimeters.On around the blind flange, open circular hole 303, bolt 5 fixing (Fig. 1) when being used to assemble.The one side that is connected at blind flange 3 and synthetic gas circulation framework 2 processes wide to be 5 millimeters, to be 1 millimeter rectangular recess 302 deeply; When assembling (Fig. 1), the 0.4 millimeter width that adds thickness in the groove 302 is 5 millimeters a graphite gasket 4, and the boss 203 with synthetic gas circulation framework 2 seals again.
Graphite gasket 4 is a rectangle packing ring, is made by resistant to elevated temperatures graphite.This packing ring is wide 5 millimeters, thick 0.3-0.5 millimeter, preferred 0.4 millimeter.
The suitable working temperature of palladium film is 450-600 ℃, and after the assembling of palladium membrane separation apparatus finished, the outside coated lagging material to reduce heat lost by radiation.Lagging material can be selected resistant to elevated temperatures ceramic fiber or other materials for use, and material thickness is to guarantee that the lagging material hull-skin temperature is not higher than 10 ℃ of envrionment temperatures and calculates definite.
Shown in Fig. 1～2, the assembling sequence that contains the palladium membrane separation unit of 2 palladium membrane components is: blind flange, Graphite pad, synthetic gas circulation framework, Graphite pad, palladium membrane component, Graphite pad, synthetic gas circulation framework, Graphite pad, palladium membrane component, Graphite pad, synthetic gas circulation framework, Graphite pad, blind flange; The parts of whole device are fixed by joint bolt and nut.When needs increase palladium membrane component quantity, can in blind flange, add Graphite pad, synthetic gas circulation framework successively, palladium membrane component gets final product.
During work, at first utilize 204 pairs of membrane separation apparatuss of high temperature gas passage to carry out preheating, when temperature is increased to the working temperature (generally at 450-600 ℃) of palladium film, highly compressed is contained hydrogen mixed gas to be introduced by the ingress pipe 202 of synthetic gas circulation framework 2, in the hydrogen-containing gas circulation passage, hydrogen in the mixed gas contacts with palladium film 106, be delivered to hydrogen circulation path 10 2 by palladium film 106, sintering metal 105, draw the palladium membrane separation unit by hydrogen fairlead 104 again, become highly purified product hydrogen.In the constant temperature stage of membrane separation apparatus, the flow by reducing high-temperature gas or sneak into normal temperature air and realize.
Type of heating at common membrane separation apparatus generally adopts the pyritous rare gas element or is processed as the yardstick duct in palladium membrane component inside, because also there is certain difficulty in preparation high temperature inert gas cost height at processing microscale channel on the palladium membrane component on processing technology.The utility model is expected to make full use of a large amount of heats in the high-temperature tail gas, around synthetic gas circulation framework, process circle or rectangular flow circulation passage to membrane separation apparatus preheating and maintenance constant temperature, be specially adapted to unite use, improve efficiency of energy utilization with the device that the high-temperature tail gas discharging is arranged.
Claims (6)
1, a kind of palladium membrane hydrogen separation device based on high temperature preheating, between two blind flanges, be provided with a plurality of palladium membrane components, be provided with synthetic gas circulation framework between blind flange and the palladium membrane component and between palladium membrane component and the palladium membrane component, reach between synthetic gas circulation framework and the palladium membrane component between blind flange and the synthetic gas circulation framework Graphite pad is installed; Described blind flange is a square plate; All around be respectively equipped with groove with palladium membrane component with the one side that synthetic gas circulation framework is connected at blind flange, be provided with graphite gasket in the groove, the boss of synthetic gas circulation framework and the groove on blind flange and the palladium membrane component are tightly connected; It is characterized in that: described synthetic gas circulation framework is a quadra, and the centre is a cavity; Quadra and blind flange or palladium membrane component form the space of sealing, are provided with hydrogen containing synthesis gas at synthetic gas circulation framework and import and delivery line, and the cavity that importing and delivery line and the synthetic gas of palladium membrane component circulate in the framework is communicated with; Around synthetic gas circulation framework, be provided with boss, high-temperature gas ingress pipe, delivery line and high-temperature gas circulation passage; The channel cross-section of described high-temperature gas circulation passage is circular, and its diameter is the 3-5 millimeter, and the channel cross-section of perhaps described high-temperature gas circulation passage is a rectangle, and the length of side is the 3-5 millimeter.
2, the palladium membrane hydrogen separation device based on high temperature preheating according to claim 1, it is characterized in that: the film support frame both sides of described palladium membrane component have porous sintered metal supporter and palladium alloy membrane respectively, the film support frame contains and is cleaned the hydrogen gas stream circulation passage, this passage is two symmetric rectangular toothed combinations, passage width is the 3-5 millimeter, support frame between the passage is the 3-5 millimeter, and the gas export mouth is arranged on support frame two ends up and down, is communicated with gas channel; Process a rectangular recess that is used for synthetic gas circulation frame seal around the described film support frame, the wide 3-7 millimeter of described groove, dark 1-3 millimeter.
3, the palladium membrane hydrogen separation device based on high temperature preheating according to claim 1 is characterized in that: open circular hole, bolting when being used to assemble on around the described blind flange.
4, the palladium membrane hydrogen separation device based on high temperature preheating according to claim 1, it is characterized in that: it is rectangular recess that described blind flange is respectively equipped with groove all around with the one side that palladium membrane component is connected with synthetic gas circulation framework, and described recess width is that 3-7 millimeter, the degree of depth are the 1-3 millimeter.
5, the palladium membrane hydrogen separation device based on high temperature preheating according to claim 1, it is characterized in that: the boss width of described synthetic gas circulation framework is than the narrow 0.3-0.7 millimeter of the width of the groove of blind flange and palladium membrane component, and height is identical with the depth of groove of blind flange and palladium membrane component.
6, the palladium membrane hydrogen separation device based on high temperature preheating according to claim 1, it is characterized in that: the rectangle packing ring of described graphite gasket for making by resistant to elevated temperatures graphite, width is identical with the width of the groove of blind flange and palladium membrane component, thick 0.3-0.5 millimeter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200533496U CN201400568Y (en) | 2009-03-25 | 2009-03-25 | Palladium membrane hydrogen separation device based on high-temperature preheating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200533496U CN201400568Y (en) | 2009-03-25 | 2009-03-25 | Palladium membrane hydrogen separation device based on high-temperature preheating |
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| CN201400568Y true CN201400568Y (en) | 2010-02-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104925756A (en) * | 2014-03-18 | 2015-09-23 | 日本派欧尼株式会社 | Hydrogen purifying device and hydrogen purifying system employing the same |
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2009
- 2009-03-25 CN CN2009200533496U patent/CN201400568Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104925756A (en) * | 2014-03-18 | 2015-09-23 | 日本派欧尼株式会社 | Hydrogen purifying device and hydrogen purifying system employing the same |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100210 Effective date of abandoning: 20090325 |