CN202968507U - Device for removing oxygen from marsh gas based on plasma reactor - Google Patents
Device for removing oxygen from marsh gas based on plasma reactor Download PDFInfo
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- CN202968507U CN202968507U CN 201220300284 CN201220300284U CN202968507U CN 202968507 U CN202968507 U CN 202968507U CN 201220300284 CN201220300284 CN 201220300284 CN 201220300284 U CN201220300284 U CN 201220300284U CN 202968507 U CN202968507 U CN 202968507U
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Abstract
The utility model relates to a device for removing oxygen from marsh gas based on a plasma reactor. The device comprises a plasma reactor, wherein the plasma reactor is provided with a gas inlet, a gas outlet, a grounding electrode, and a high-voltage discharge electrode and the high-voltage discharge electrode is connected with a high-voltage power supply. Oxygen-containing marsh gas is introduced into the plasma reactor through the gas inlet of the plasma reactor; methane and oxygen in the marsh gas have oxidization reaction to form carbon oxide and water under the action of high-energy electrons of a discharge plasma and active free radicals so that oxygen removal from the marsh gas is achieved; and the oxygen-removed marsh gas is exhausted through the gas outlet of the plasma reactor. The device provided by the utility model has the beneficial effects that 1. by removing oxygen from the marsh gas using the discharge plasma, energy consumption can be reduced, and accumulated carbon inside the reactor is reduced; and 2. in comparison with other deoxidization technologies, the device is simple in process and convenient in operation, and the treated marsh gas guarantees the safety of subsequent purification and compression production of vehicle gas.
Description
Technical field
The utility model relates to methane purification purification techniques field, particularly a kind of device that removes oxygen from biogas based on plasma reactor.
Background technology
The biogas biogas is a kind of inflammable gas with higher thermal value, main by organic anaerobically fermenting generation, its main component is the gases such as methane, carbonic acid gas and a small amount of nitrogen, hydrogen, oxygen, hydrogen sulfide, and methane content is about 50-70%, and carbon dioxide content is about 30-40%.At present, the biogas utilization mode mainly comprises four kinds: 1 directly burning, civil heating, illumination and cooking etc.; 2 directly burn produces steam, is used for industrial heating; 3 oil engine generating online; 4 are used as vehicle fuel etc. after purification.
In above-mentioned biogas utilization mode, methane purification purifies Minimal energy loss, but and the conveying capacity that obtains maximum, the economic benefit of generation is maximum; Comparing other several modes of utilizing, will can realize the efficient utilization of biogas after methane purification as automobile fuel gas, is the most promising a kind of mode of utilizing.Methane purification purifies and mainly comprises five steps for vehicle fuel: biogas deoxidation, desulfurization, decarbonation, drying and compression, wherein deoxidation is particularly important, do not removed as oxygen, in compression and course of conveying, may cause explosion hazard, there is potential safety hazard, usually requires in vehicle fuel the oxygen volumn concentration lower than 0.5%.
Existing deoxidation patented technology mainly comprises catalytic deoxidation and the large class of on-catalytic deoxidation two, and wherein the on-catalytic deoxidation can be divided into pressure-variable adsorption, membrane sepn etc. again.Adopt the deoxidation of Pd catalyst hydrogenation in the described method of Chinese patent CN101219919A, increased the consumption of hydrogen in process, working cost is increased; The described method of Chinese patent CN101104825B is oxygen and the methane 500 ℃ of left and right under the condition of high temperature in biogas, realizes removing of oxygen by catalyst action generation oxidizing reaction, and because unstripped gas needs preheating, energy consumption is larger; Chinese patent CN101648843A and CN101028579A adopt respectively pressure swing adsorption process and membrane separation process deoxidation, but both in the process of deoxidation, the process that oxygen concentration is all arranged, there is potential safety hazard, both are more suitable for the oxygen separation in non-inflammable mixture, are unfavorable to removing of oxygen in biogas.
Discharge plasma technique can remove the objectionable constituent in waste gas at normal temperatures and pressures in Air Pollution Control field widespread use, comprises NO
XCN1162209C, SO
2CN102240500A and VOCsCN102151464A etc., the oxygen that so far there are no is used for biogas removes.
The utility model content
The purpose of this utility model will solve the deficiency that above-mentioned deoxy technology exists just, a kind of device that removes oxygen from biogas based on plasma reactor is provided, is that a kind of energy consumption is low, technique is simple, oxygen removes device in the biogas under normal temperature and pressure conditions.
The technical scheme that its technical problem that solves the utility model adopts is: this device that removes oxygen from biogas based on plasma reactor, comprise plasma reactor, described plasma reactor is provided with inlet mouth, air outlet, earthing pole and high voltage discharge electrode, and high voltage discharge electrode is connected with high-voltage power supply.
As preferably, described high-voltage power supply is frequency high voltage power supply, high-frequency and high-voltage power supply or high-voltage pulse power source.
As preferably, in described plasma reactor, discharge type is dielectric barrier discharge, glow discharge or corona discharge.
As preferably, described plasma reactor configurations is line-cartridge type, line-board-like and filling type.
As preferably, described plasma reactor adopts the filling type structure of reactor, axial two ends of filled media are provided with the polytetrafluoro porous support plate, the radial outside of filled media is provided with block media, filled media is quartz glass ball or activated alumina ball, and earthing pole is arranged on the outside of block media.
The oxygen method that removes that this practicality is adopted, step is as follows:
1, with the inlet mouth importing plasma reactor of oxygenous biogas by plasma reactor;
2, regulate high-voltage power supply, make beginning geseous discharge in plasma reactor, under the high-energy electron and living radical effect of discharge plasma, the methane in biogas and oxygen generation oxidizing reaction, form carbonic acid gas and water, thereby the oxygen of realizing biogas removes;
3, the biogas that removes after oxygen is discharged from the air outlet of plasma reactor, enters follow-up marsh gas purifying workshop section.
As preferably, the discharge energy density in described plasma reactor at 50J/L between 500J/L.
As preferably, in described plasma reactor, the residence time of biogas is between 0.1 second to 10 seconds.
The effect that the utility model is useful is: 1 oxygen that utilizes discharge plasma to remove in biogas can reduce energy consumption, reduces carbon distribution in reactor; 2 compare other deoxy technology, and this method technique is simple, easy to operate, and biogas is after treatment produced vehicle fuel for follow-up purification and compression safety control is provided.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1;
Gas chromatogram before and after the deoxidation of Fig. 2 biogas plasma body;
Description of reference numerals: 1-1 inlet mouth, 1-2 block media, 1-3 earthing pole, 1-4 filled media, 1-5 polytetrafluoro porous support plate, 1-6 high voltage discharge electrode, 1-7 air outlet, 2 high-voltage power supplies.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
The simulation biogas for preparing is imported to plasma reactor by inlet mouth 1-1, regulate high-voltage power supply 2, make simulation biogas in the interior regular discharge of plasma reactor 1.Under the effect of discharge plasma, oxygen and the methane reaction of simulation in biogas generates carbonic acid gas and water, thereby realizes the removing of oxygen in biogas.
Processing parameter and discharge parameter: discharge frequency 8.1kHz, discharge length 80mm, interelectrode distance 7.5mm, gas temperature are room temperature, power input voltage variation range 50V-130V, O in unstripped gas
2Concentration 5%, CO
2Concentration 30%, CH
4Concentration 65%, charge flow rate 300ml/min, experimental result such as table 1 and shown in Figure 2.
Table 1
As can be seen from Figure 1, after discharge plasma was processed, the oxygen in simulation biogas obviously removed.
As can be seen from Table 1, increase gradually along with the input voltage discharge energy density, the oxygen removal efficiency increases gradually, when power input voltage increases to the 70V energy density and is 321J/L, in biogas, the oxygen removal efficiency can reach 91.1%, and simulate that in biogas, the oxygen volumn concentration has reached the vehicle fuel standard this moment, continues to strengthen input voltage, in simulation biogas, oxygen content can further reduce, but energy consumption increases; Meanwhile, strengthen input voltage, increase energy density, methane removes and oxygen generation oxidizing reaction, also generates carbon monoxide and hydrogen with carbonic acid gas generation reforming reaction, consumes methane, thereby to select discharge energy density 321J/L be suitable electrical parameter, oxygen in selectively removing biogas.Adopt the described high-temperature catalytic method of deoxidation of Chinese patent CN101104825B, unstripped gas needs preheating, as pressing 500 ℃ of calculating of temperature of reaction, every liter of biogas preheating needs approximately 1500 joules of heat energy, be equivalent to energy density 1500J/L, be far longer than plasma body deoxidation institute energy requirement, thereby the using plasma deoxidation can reduce energy consumption greatly.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (5)
1. device that removes oxygen from biogas based on plasma reactor, comprise plasma reactor, it is characterized in that: described plasma reactor is provided with inlet mouth (1-1), air outlet (1-7), earthing pole (1-3) and high voltage discharge electrode (1-6), and high voltage discharge electrode (1-6) is connected with high-voltage power supply (2).
2. the device that removes oxygen from biogas based on plasma reactor according to claim 1 is characterized in that: described high-voltage power supply (2) is frequency high voltage power supply, high-frequency and high-voltage power supply or high-voltage pulse power source.
3. the device that removes oxygen from biogas based on plasma reactor according to claim 1 is characterized in that: in described plasma reactor, discharge type is dielectric barrier discharge, glow discharge or corona discharge.
4. the device that removes oxygen from biogas based on plasma reactor according to claim 1, it is characterized in that: described plasma reactor configurations is line-cartridge type, line-board-like and filling type.
5. the device that removes oxygen from biogas based on plasma reactor according to claim 4, it is characterized in that: described plasma reactor adopts the filling type structure of reactor, axial two ends of filled media (1-4) are provided with polytetrafluoro porous support plate (1-5), the radial outside of filled media (1-4) is provided with block media (1-2), filled media is quartz glass ball or activated alumina ball, and earthing pole (1-3) is arranged on the outside of block media (1-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220300284 CN202968507U (en) | 2012-06-21 | 2012-06-21 | Device for removing oxygen from marsh gas based on plasma reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220300284 CN202968507U (en) | 2012-06-21 | 2012-06-21 | Device for removing oxygen from marsh gas based on plasma reactor |
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| CN202968507U true CN202968507U (en) | 2013-06-05 |
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| CN 201220300284 Expired - Fee Related CN202968507U (en) | 2012-06-21 | 2012-06-21 | Device for removing oxygen from marsh gas based on plasma reactor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102772989A (en) * | 2012-06-21 | 2012-11-14 | 浙江工业大学 | Plasma reactor based device and method for removing oxygen from biogases |
| CN104941807A (en) * | 2015-07-09 | 2015-09-30 | 广州市美控电子科技有限公司 | High-frequency and high-voltage discharge electrode for waste incineration pollution-free treatment system |
| CN111020617A (en) * | 2019-12-26 | 2020-04-17 | 初强 | Technology and method for preparing hydrogen-oxygen combustible mixed gas by impacting water molecules with high-energy electrons |
-
2012
- 2012-06-21 CN CN 201220300284 patent/CN202968507U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102772989A (en) * | 2012-06-21 | 2012-11-14 | 浙江工业大学 | Plasma reactor based device and method for removing oxygen from biogases |
| CN104941807A (en) * | 2015-07-09 | 2015-09-30 | 广州市美控电子科技有限公司 | High-frequency and high-voltage discharge electrode for waste incineration pollution-free treatment system |
| CN111020617A (en) * | 2019-12-26 | 2020-04-17 | 初强 | Technology and method for preparing hydrogen-oxygen combustible mixed gas by impacting water molecules with high-energy electrons |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20200621 |