CN104176706A - Method for extracting high purity hydrogen from coke oven gas reformed gas - Google Patents
Method for extracting high purity hydrogen from coke oven gas reformed gas Download PDFInfo
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- CN104176706A CN104176706A CN201310195928.5A CN201310195928A CN104176706A CN 104176706 A CN104176706 A CN 104176706A CN 201310195928 A CN201310195928 A CN 201310195928A CN 104176706 A CN104176706 A CN 104176706A
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Abstract
The invention provides a method for extracting high purity hydrogen from coke oven gas reformed gas; an ultra-highly hydrogen-permeation-selective metal palladium composite membrane hydrogen purification device is used, the high purity hydrogen is obtained from the coke oven gas reformed gas under the conditions guaranteeing high hydrogen recovery rate. The coke oven gas reformed gas first enters a buffer tank, then enters a compressor for pressure rise, then successively passes through a filter and an electric heater to enter into the metal palladium composite membrane hydrogen purification device, and is cooled by a cooler to obtain the high purity hydrogen with the purity greater than 99.999%, the CO content is less than 1.0ppm, and at the same time, because of high hydrogen permeation rate of the metal palladium composite membrane, a higher raw gas treatment amount can be obtained under the conditions of the recovery rate being more than 90%, and full utilization of the coke oven gas can be achieved. The high purity hydrogen extracted by the method can be widely applied in chemical industry, electronics, metallurgy and food industry.
Description
Technical field:
The present invention relates to a kind of from coke-oven gas reformed gas the separation method of purifying hydrogen of hydrogen, utilize the superelevation hydrogen permeation selectivity of metal palladium-based composite membrane hydrogen purifier, under high hydrogen recovery rate, extract and obtain high-purity hydrogen by direct type one-level.
Background technology:
Hydrogen is widely used in the every field of national economy as important industrial production raw material.In recent years, along with the introduction of scientific and technical progress and development and advanced foreign technology, equipment, the purposes of hydrogen is constantly expanded, the demand of hydrogen is constantly increased.Meanwhile, because professional hydrogen gas production is higher to technology, equipment, environmental requirement, determined the difficulty of the production of hydrogen, utilized industrial tail gas, the pure hydrogen of development and production and high-purity hydrogen, will obtain considerable economic benefit and social benefit.
Coke-oven gas is the by product of process of coking, is good hydrogen feedstock, China's coke-oven gas aboundresources, but the actual level of utilizing is very low, mostly directly burns as industry or domestic fuel, has caused the serious wasting of resources and environmental pollution.
The shortcomings such as the separation of coke-oven gas and purification techniques mainly contain pressure swing adsorption process, separation by deep refrigeration and normal film partition method, and pressure swing adsorption process can be produced highly purified hydrogen, but it is large to have facility investment, the low and product hydrogen purity fluctuation of the rate of recovery; And that separation by deep refrigeration obtains hydrogen purity is not high, the complicated investment of equipment is large; The hydrogen permeation selectivity of normal film partition method is little, conventionally only has tens or hundreds of, makes the purity of recover hydrogen not high, generally can only improve 1～2 order of magnitude, also has the shortcomings such as the treatment capacity of unit membrane area is little simultaneously.
The present invention adopts metal palladium-based composite membrane hydrogen purifier to carry out hydrogen purification to coke-oven gas reformed gas, overcome the defect of above-mentioned separation method, select high hydrogen amount thoroughly, highly selective metal palladium-based composite membrane, can be to the indiscriminate effective interception of foreign gas, thereby obtain high-purity hydrogen, with respect to gas water steam reforming, the high-purity hydrogen that methanol decomposition or ammonia decomposition etc. are produced by low temperature separation process and pressure-variable adsorption, the investment of this production method significantly reduces, the High Purity Hydrogen cost of producing also significantly reduces, can be widely used in chemical industry, electronics, in metallurgy and foodstuffs industry.The present invention's secondary metal palladium-based composite membrane hydrogen purifier of can also connecting, purify by the secondary to first class product hydrogen, obtain the ultra-pure hydrogen that purity is greater than 99.999999%, can become the supporting ultra-pure hydrogen device of the industry such as LED and semi-conductor, by promoting the development of the strategic new industries such as electronic information, semi-conductor, polysilicon, LED and photovoltaic generation, the social construction of promoting IT application, energy-saving and emission-reduction and energy sustainable development are extremely important.
Summary of the invention
The object of this invention is to provide a kind of method of utilizing coke-oven gas reformed gas to extract high-purity hydrogen, by adopting the hydrogen permeation selectivity of superelevation, high hydrogen palladium metal or the palladium alloy composite membrane hydrogen purifier of amount thoroughly, under high hydrogen recovery rate condition, from coke-oven gas reformed gas, obtain the High Purity Hydrogen that purity is greater than 99.999%, simultaneously because the mechanism of purifying hydrogen of hydrogen and pressure swing adsorption, cold separation technology are different, can be to the indiscriminate effective interception removal of foreign gas.
For achieving the above object, the present invention adopts following technical scheme:
First coke-oven gas reformed gas enter surge tank, then enter after hydrogen gas compressor boosts to 0.3-2.5MPa and filter through strainer the particulate matter that is greater than 0.1 μ m, after being warmed up to 300-500 DEG C by electric heater again, enter palladium metal or palladium alloy composite membrane hydrogen purifier separating-purifying, product hydrogen obtains the high-purity hydrogen that purity is greater than 99.999% after water cooler is cooling.
Described hydrogen gas compressor is diaphragm type, centrifugal, piston type hydrogen compressor.
Described strainer is gas filter, accurate gas filter or accurate air filter.
Described electric heater is telescoping, board-like, shell and tube or tube and shell heat exchanger.
Described genus palladium or palladium alloy composite membrane hydrogen purifier are the hydrogen purifier that adopts multi-channel metal palladium-based composite membrane material to prepare; Described palladium metal or palladium alloy composite membrane are multi-channel metal palladium or the palladium alloy composite membrane that one or more palladium metal or palladium alloy composite membrane form.
Described coke-oven gas reformed gas refers to the gas producing in process of coking, the reformed gas that methane wherein obtains after steam reforming.
The present invention's tool compared with existing hydrogen extractive technique has the following advantages:
(1) adopt direct type flash trapping stage for the feature of the impurity gas complicated component of coke-oven gas reformed gas, obtain 99.999% High Purity Hydrogen, equipment is simple compared with pressure swing adsorption, cold separation technology, and separation efficiency is high.
(2) hydrogen purifier prepared by the multi-channel metal palladium-based composite membrane material adopting in the present invention has unit membrane area hydrogen compared with traditional membrane separation technique, and amount is large thoroughly, selectivity is high can carry out indiscriminate effective interception to foreign gas, and the hydrogen rate of recovery remains on more than 90% simultaneously.
Brief description of the drawings
Fig. 1 extracts hydrogen device schematic diagram in coke-oven gas reformed gas;
In figure: 1 surge tank; 2 hydrogen gas compressors; 3 strainers; 4 electric heaters; 5 metal palladium-based composite membrane hydrogen purifier; 6 water coolers;
Fig. 2 is multi-channel metal palladium-based composite membrane cross sectional representation;
Fig. 3 is multi-channel metal palladium-based composite membrane structural representation;
Fig. 4 is multi-channel metal palladium-based composite membrane hydrogen purifier structure iron.
Embodiment
The structure of described palladium metal or palladium alloy composite membrane hydrogen purifier refers to application national application for a patent for invention " a kind of multi-channel metal palladium or palladium alloy composite membrane hydrogen gas segregator " (number of patent application: 200810117897.0), formed by one or more palladium metal or palladium alloy composite membrane, using hyperchannel vitrified pipe 1 as palladium metal or the supporter of palladium alloy composite membrane 2, its cross sectional representation is shown in Fig. 2, at hyperchannel vitrified pipe internal surface, the cross section 3 at two and form continuous palladium film or palladium alloy composite membrane (its section as shown in Figure 3) apart from the outside surface of termination 30mm, adopt the carbon seal ring 4 about 10mm in surface distance termination place outside, multi-channel metal palladium film or palladium alloy composite membrane are connected to sealing with metal joint 5, again metal joint 5 and shell separator 6 are connected to form to hydrogen separator, wherein one end adopts metallic hose 7 to connect, the hydrogen gas segregator structural representation of this multi-channel metal palladium-based composite membrane composition as shown in Figure 4.Described coke-oven gas reformed gas main component is: H
2, CH
4, CO, CO
2, N
2.The saturating nitrogen amount of room temperature of described palladium metal or palladium alloy composite membrane is 1.0ml/min.bar, and 400 DEG C of saturating hydrogen amounts are 40L/min.bar, its H
2/ N
2separation factor is greater than 50000.
Embodiment 1:
Taking hydrogeneous 76.71%(in table one) coke-oven gas reformed gas be unstripped gas, adopt metal palladium-based composite membrane hydrogen purifier to carry out hydrogen purification.As shown in Figure 1, coke-oven gas reformed gas enters surge tank 1 under 0.1MPa, through hydrogen gas compressor 2, pressure is brought up to 0.48MPa, entering electric heater 4 by strainer 3 is heated to 415 DEG C and enters metal palladium-based composite membrane hydrogen purifier 5, carry out hydrogen purification, permeated hydrogen pressure is 0.11MPa, can't detect online any impurity through gas-chromatography TCD detector, is less than 1.0ppm, CO through gas-chromatography fid detector offline inspection CO content
2content 4.0ppm, illustrates that permeated hydrogen purity is greater than 99.999%.Hydrogen recovery rate 90.4%, permeated hydrogen flow 98.8m
3/ h.Shown in unstripped gas and permeated hydrogen table composed as follows:
Table 1 multi-channel metal palladium-based composite membrane hydrogen purification result
| Title | H 2(%) | CH 4(%) | CO(%) | CO 2(%) | N 2(%) |
| Reformed gas | 76.71 | 0.09 | 0.80 | 19.02 | 3.38 |
| Infiltration gas | >99.999 | Do not detect | <1.0ppm | 4.0ppm | Do not detect |
Embodiment 2:
Taking hydrogeneous 76.15%(in table two) coke-oven gas reformed gas be unstripped gas, adopt metal palladium-based composite membrane hydrogen purifier to carry out hydrogen purification.As shown in Figure 1, coke-oven gas reformed gas enters surge tank 1 under 0.1MPa, through hydrogen gas compressor 2, pressure is brought up to 0.66MPa, entering electric heater 4 by strainer 3 is heated to 410 DEG C and enters metal palladium-based composite membrane hydrogen purifier 5, carry out hydrogen purification, permeated hydrogen pressure is 0.11MPa, can't detect online any impurity through gas-chromatography TCD detector, is less than 1.0ppm, CO through gas-chromatography fid detector offline inspection CO content
2content 4.2ppm, illustrates that permeated hydrogen purity is greater than 99.999%.Hydrogen recovery rate 93.1%, permeated hydrogen flow 112.3m
3/ h.Shown in unstripped gas and permeated hydrogen table composed as follows:
Table 2 multi-channel metal palladium-based composite membrane hydrogen purification result
| Title | H 2(%) | CH 4(%) | CO(%) | CO 2(%) | N 2(%) |
| Reformed gas | 76.15 | 0.16 | 0.86 | 19.87 | 2.96 |
| Infiltration gas | >99.999 | Do not detect | <1.0ppm | 4.2ppm | Do not detect |
Embodiment 3:
Taking hydrogeneous 78.2%(in table three) coke-oven gas reformed gas be unstripped gas, as shown in Figure 1, coke-oven gas reformed gas enters surge tank 1 under 0.1MPa, through hydrogen gas compressor 2, pressure is brought up to 0.88MPa, entering electric heater 4 by strainer 3 is heated to 405 DEG C and enters metal palladium-based composite membrane hydrogen purifier 5, carry out hydrogen purification, permeated hydrogen pressure is 0.11MPa, can't detect online any impurity through gas-chromatography TCD detector, be less than 1.0ppm through gas-chromatography fid detector offline inspection CO content, CO2 content 4.5ppm, illustrate that permeated hydrogen purity is greater than 99.999%.Hydrogen recovery rate 95.2%, permeated hydrogen flow 125.1m
3/ h.Shown in unstripped gas and permeated hydrogen table composed as follows:
Table 3 multi-channel metal palladium-based composite membrane hydrogen purification result
| Title | H 2(%) | CH 4(%) | CO(%) | CO 2(%) | N 2(%) |
| Reformed gas | 78.22 | 0.04 | 0.70 | 19.02 | 2.02 |
| Infiltration gas | >99.999 | Do not detect | <1.0ppm | 4.5ppm | Do not detect |
In above-mentioned 3 embodiment, when each component concentration of coke-oven gas reformed gas fluctuates among a small circle, can keep stable by the permeated hydrogen composition of multi-channel metal palladium-based composite membrane hydrogen purification, hydrogen purity is greater than 99.999% all the time, and hydrogen recovery rate is greater than 90%.
The present invention adopts the hydrogen permeation selectivity metal palladium-based composite membrane hydrogen purifier of superelevation, under guarantee hydrogen high-recovery condition, from coke-oven gas reformed gas, obtains High Purity Hydrogen.First coke-oven gas reformed gas enter surge tank, then after entering compressor and boosting successively by entering metal palladium-based composite membrane hydrogen purifier after strainer, electric heater, after water cooler, obtain the high-purity hydrogen that purity is greater than 99.999%, wherein CO content is less than 1.0ppm, simultaneously because the high hydrogen of metal palladium-based composite membrane is measured thoroughly, can under the rate of recovery is greater than 90% condition, obtain higher unstripped gas treatment capacity, realize making full use of coke-oven gas.The High Purity Hydrogen of utilizing the method to extract can be widely used in chemical industry, electronics, metallurgy and foodstuffs industry.
Claims (10)
1. a method of extracting high-purity hydrogen from coke-oven gas reformed gas, is characterized in that:
First coke-oven gas reformed gas enter surge tank (1), then after entering compressor (2) and boosting, successively by entering palladium metal or palladium alloy composite membrane hydrogen purifier (5) after strainer (3), electric heater (4), after water cooler (6), obtained hydrogen by the isolated hydrogen of purifier (5).
2. the method for claim 1, is characterized in that: after described coke-oven gas reformed gas desulfurization dewatering, generally consist of: H
267～84%, CO0.18～2.0%, CO
215～25%, N
20.8～4.5%, CH
40.02～1.5%.
3. the method for claim 1, is characterized in that: described hydrogen gas compressor is diaphragm type, centrifugal or piston type hydrogen compressor, unstripped gas can be pressurized to 0.3-2.5MPa from 0.1MPa.
4. the method for claim 1, is characterized in that: described strainer is gas filter, accurate gas filter or accurate air filter, can filter out the particulate matter that is greater than 0.1 μ m in unstripped gas.
5. the method for claim 1, is characterized in that: described electric heater is telescoping, board-like, shell and tube or tube and shell heat exchanger, unstripped gas can be heated to 300-500 DEG C.
6. the method for claim 1, is characterized in that: described metal palladium-based composite membrane hydrogen purifier is the hydrogen purifier that adopts multi-channel metal palladium or palladium alloy composite membrane material to prepare.
7. the method as described in claim 1 or 6, it is characterized in that: the structure of described palladium metal or palladium alloy composite membrane hydrogen purifier refers to the national application for a patent for invention of application " a kind of multi-channel metal palladium or palladium alloy composite membrane hydrogen gas segregator ", number of patent application: 200810117897.0.
8. the method for claim 1, is characterized in that: described employing metal palladium-based composite membrane hydrogen purifier is that coke-oven gas reformed gas is carried out to the extraction of direct type one-level; After water cooler (6), obtained the high-purity hydrogen that purity is greater than 99.999% by the isolated hydrogen of purifier (5).
9. the method for claim 1, is characterized in that: be cooled to room temperature by the isolated hydrogen of purifier (5) through water cooler (6); Hydrogen recovery rate is greater than under 90% condition, and product hydrogen pressure reaches 0.1-0.6MPa.
10. the method for claim 1, is characterized in that: described coke-oven gas reformed gas refers to the gas producing in process of coking, the reformed gas that methane wherein obtains after steam reforming.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105197887A (en) * | 2015-09-15 | 2015-12-30 | 中国矿业大学 | Steam reforming device and method for producing hydrogen and fixing carbon through coke oven gas in synergic mode |
| CN105731377A (en) * | 2014-12-08 | 2016-07-06 | 大连华海制氢设备有限公司 | Method for small-scale production of ultra-pure hydrogen |
| CN106861452A (en) * | 2017-03-01 | 2017-06-20 | 杭州瑞裕通膜技术有限公司 | Membrane module, the hydrogen gas recovering device based on membrane module and Hydrogen Separation method |
| CN108100994A (en) * | 2018-02-02 | 2018-06-01 | 吴海雷 | A kind of hydrogen recycling purification system and its control method |
| CN111646432A (en) * | 2020-06-11 | 2020-09-11 | 上海齐耀动力技术有限公司 | Hydrogen purification system |
| CN111689469A (en) * | 2019-03-15 | 2020-09-22 | 中石化南京化工研究院有限公司 | Process for preparing high-purity hydrogen by adopting palladium alloy membrane purification |
| CN113562695A (en) * | 2021-08-11 | 2021-10-29 | 大连理工大学 | Coke oven gas membrane separation, steam reforming and pressure swing adsorption combined hydrogen production method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105731377A (en) * | 2014-12-08 | 2016-07-06 | 大连华海制氢设备有限公司 | Method for small-scale production of ultra-pure hydrogen |
| CN105197887A (en) * | 2015-09-15 | 2015-12-30 | 中国矿业大学 | Steam reforming device and method for producing hydrogen and fixing carbon through coke oven gas in synergic mode |
| CN106861452A (en) * | 2017-03-01 | 2017-06-20 | 杭州瑞裕通膜技术有限公司 | Membrane module, the hydrogen gas recovering device based on membrane module and Hydrogen Separation method |
| CN108100994A (en) * | 2018-02-02 | 2018-06-01 | 吴海雷 | A kind of hydrogen recycling purification system and its control method |
| CN111689469A (en) * | 2019-03-15 | 2020-09-22 | 中石化南京化工研究院有限公司 | Process for preparing high-purity hydrogen by adopting palladium alloy membrane purification |
| CN111646432A (en) * | 2020-06-11 | 2020-09-11 | 上海齐耀动力技术有限公司 | Hydrogen purification system |
| CN113562695A (en) * | 2021-08-11 | 2021-10-29 | 大连理工大学 | Coke oven gas membrane separation, steam reforming and pressure swing adsorption combined hydrogen production method |
| CN113562695B (en) * | 2021-08-11 | 2023-07-18 | 大连理工大学 | Coke oven gas membrane separation, steam reforming and pressure swing adsorption combined hydrogen production method |
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