CN114195096A - Method and system for improving thermal plasma of combustible gas containing high-alkane organic matter - Google Patents
Method and system for improving thermal plasma of combustible gas containing high-alkane organic matter Download PDFInfo
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- CN114195096A CN114195096A CN202111469517.1A CN202111469517A CN114195096A CN 114195096 A CN114195096 A CN 114195096A CN 202111469517 A CN202111469517 A CN 202111469517A CN 114195096 A CN114195096 A CN 114195096A
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- plasma torch
- air inlet
- combustible gas
- gas
- oxygen
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000005416 organic matter Substances 0.000 title description 3
- 239000007789 gas Substances 0.000 claims abstract description 91
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000001301 oxygen Substances 0.000 claims abstract description 41
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 41
- 150000001335 aliphatic alkanes Chemical class 0.000 claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 5
- 230000000153 supplemental effect Effects 0.000 claims 2
- 230000001502 supplementing effect Effects 0.000 abstract description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 9
- 229910002091 carbon monoxide Inorganic materials 0.000 description 9
- 239000001257 hydrogen Substances 0.000 description 9
- 229910052739 hydrogen Inorganic materials 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- 239000000571 coke Substances 0.000 description 5
- 239000002028 Biomass Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001273 butane Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/22—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds
- C01B3/24—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds of hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a combustible gas thermal plasma improvement system containing high alkane organic matters, which comprises a plasma torch, a plasma torch driving power supply, a combustible gas inlet and an oxygen supplementing air inlet, wherein the combustible gas inlet and the oxygen supplementing air inlet are respectively connected to different positions of the plasma torch, the gas inlet is connected with a gas storage tank through a gas inlet pipe, and a first flowmeter and a first gas inlet valve are connected to the gas inlet pipe in series; the oxygen supplementing air inlet is connected with a high-pressure air pump through an oxygen supplementing pipe, and a flow meter II and an air inlet valve II are connected to the oxygen supplementing pipe in series; the plasma torch comprises a plasma torch anode and a plasma torch cathode, and the distance between the cathode head and the oxygen supplementing air inlet is a preset distance; and the end part of the plasma torch is provided with an air outlet. The invention also provides an improved method. The invention has strong practicability and functionality and can be widely applied to the technical field of combustible gas.
Description
Technical Field
The invention relates to the field of combustible gas, in particular to a method and a system for improving thermal plasma of combustible gas containing high-alkane organic matters.
Background
A gas engine is a power plant using combustible gas as fuel, and the most commonly used combustible gas includes: natural gas, methane, liquefied petroleum gas, coke oven gas, biomass pyrolysis gas and the like, and the combustible gas is mainly composed of a certain component and has other combustible components. For combustible gases with more complex composition, for example: the biomass pyrolysis gas or coke oven gas and the like adopt unified use standards due to different air-fuel ratios and antiknock properties of all combustible components, so that gas engine knocking is easy to generate, or the combustion is incomplete, or the efficiency is not high.
There are studies showing that: with the same percentage by volume of CO in the fuel being combusted in the combustion chamber
Ratio of efficiency CH4High, the ratio of converting fuel gas into CO gas is converted into CH under the condition of the same C atoms of fuel4Is more favorable for the combustion chamber
The efficiency is improved. The greater the concentration of higher hydrocarbons in the gaseous fuel, the lower its methane number and the more likely it is to produce knocking, such as propane, butane, pentane, and the like. The working efficiency of the gas fuel engine depends on the flammability of the mixture to a great extent, the ignition temperature of hydrogen and carbon monoxide is lower than that of methane, the maximum combustion speed is high, the ignition and the starting of the combustible gas with hydrogen and carbon monoxide as main components are easier, and the efficiency of the combustion engine is high. The biomass pyrolysis gas contains light coke (high alkane) components with higher concentration, and is directly used for a gas engine to easily generate coking and carbon deposition. Therefore, in order to improve the performance of gas turbines, simplify the design of gas turbines, and improve the efficiency of gas turbines, it is highly desirable to improve the conversion of a fuel gas containing a plurality of higher hydrocarbons into lower hydrocarbons or into hydrogen and carbon monoxide.
At present, the combustible gas is basically directly used without deep improvement. For combustible gas generated by biomass, a technology for converting heavy coke components into light coke by adopting a catalytic improvement technology is researched, and the technology needs an external heating source, so that the power consumption is higher; the control requirement of the added oxygen is high, the danger of explosion exists, if the added oxygen is excessive, a large amount of water and carbon dioxide are generated, and the heat value of the combustible gas is reduced; the catalyst is easy to deactivate, and has a distance from practical application.
Disclosure of Invention
In view of the above problems, the present invention provides an improved method and an improved system for combustible containing high alkane organic matter.
The technical scheme provided by the invention is as follows:
the thermal plasma improvement system for the combustible gas containing the high-alkane organic matters is characterized by comprising a plasma torch, a plasma torch driving power supply, a combustible gas inlet and an oxygen supplementing air inlet, wherein the combustible gas inlet and the oxygen supplementing air inlet are respectively connected to different positions of the plasma torch, the gas inlet is connected with a gas storage tank through a gas inlet pipe, and a first flowmeter and a first gas inlet valve are connected to the gas inlet pipe in series; the oxygen supplementing air inlet is connected with a high-pressure air pump through an oxygen supplementing pipe, and a flow meter II and an air inlet valve II are connected to the oxygen supplementing pipe in series; the plasma torch comprises a plasma torch anode and a plasma torch cathode, and the distance between the cathode head and the oxygen supplementing air inlet is a preset distance; and the end part of the plasma torch is provided with an air outlet.
Further, the oxygen supplementing air inlet is positioned at the head end position of the plasma torch.
Further, the gas storage tank is used for storing combustible gas to be improved, and the high-pressure air pump is used for conveying oxygen.
Further, the plasma torch is internally provided with a channel for gas to flow through, and the preset distance is 1-5 times of the inner diameter of the channel.
Further, the first air inlet valve and the second air inlet valve both adopt manual control valves.
The invention also provides a technical scheme that:
the method for improving the thermal plasma of the combustible gas containing the high alkane organic matters is improved by adopting the improved system, and specifically comprises the following implementation steps of:
opening the first air inlet valve, adjusting the flow to a determined value according to the air inflow requirement of subsequent combustible gas using equipment, and reading the flow value by the first combustible gas flowmeter;
starting a plasma torch to ignite, igniting the plasma torch, and determining reasonable working current according to the combustible gas flow;
starting the high-pressure air pump, adjusting the air inlet valve II, and calculating and determining the specific flow value according to the formula (1):
q＝(0.1-0.5)×Q×W×W0×ρ/K0 (1)
wherein: q is the air supplement amount, and the unit is m3Q is the combustible gas flow in m3W is the mass percentage of organic components with more than 3 carbon in the combustible gas, and the unit is percent of W0The oxygen amount per unit mass of the organic components with more than 3 carbon is required for complete combustion, and the unit m is3Rho is the air density under working pressure, in kg/m3，KOIs the mass percentage of oxygen in the air and has the unit of%.
Compared with the prior art, the invention has the advantages that:
by providing a system with the combination of a plasma torch, a gas storage tank, a high-pressure gas pump, an oxygen supplementing pipe and the like, the system directly acts on combustible gas containing high-alkane organic matters, properly adds oxygen, decomposes the high-alkane organic matters contained in the combustible gas into low-alkane organic matters under the high-temperature action of thermal plasma, finally converts the low-alkane organic matters into hydrogen and carbon monoxide, generates the combustible gas taking the hydrogen and the carbon monoxide as main components, and has high treatment efficiency because the thermal plasma is adopted to directly act on the gas to be treated; and because the temperature in the thermal plasma reaches 3000 ℃, the water and carbon dioxide in the combustible gas can be decomposed, the requirement on the control precision of adding oxygen is not high, the combustible gas containing high-concentration hydrogen and carbon monoxide can be finally generated, and the problems of gas engine knocking and the like in the prior art are solved.
Drawings
FIG. 1 is a diagram of a connection structure according to an embodiment of the present invention;
fig. 2 is an intake side view in an embodiment of the present invention.
Detailed Description
The present invention is described in further detail below with reference to figures 1 and 2.
A combustible gas thermal plasma improvement system containing high alkane organic matters comprises a plasma torch, a plasma torch driving power supply 3, a combustible gas inlet 4 and an oxygen supplementing air inlet 5, wherein the combustible gas inlet 4 and the oxygen supplementing air inlet 5 are respectively connected to different positions of the plasma torch, the gas inlet 4 is connected with a gas storage tank 9 through a gas inlet pipe 13, and the gas inlet pipe 13 is connected with a flow meter I7 and a gas inlet valve I8 in series; the oxygen supplementing air inlet 5 is connected with a high-pressure air pump 10 through an oxygen supplementing pipe 14, and a flow meter II 11 and an air inlet valve II 10 are connected to the oxygen supplementing pipe 14 in series; the plasma torch comprises a plasma torch anode 2 and a plasma torch cathode 1, and the distance between the head of the cathode 1 and the oxygen supplementing air inlet 5 is a preset distance 15; the end of the plasma torch is provided with an air outlet 6.
The oxygen supplementing air inlet 5 is positioned at the head end of the plasma torch.
The gas storage tank 9 is used for storing combustible gas to be improved, and the high-pressure air pump 10 is used for delivering oxygen.
The plasma torch is provided with a passage 17 for gas to flow through, and the predetermined distance 15 is 1 to 5 times the inner diameter of the passage 17.
And the first air inlet valve 8 and the second air inlet valve 10 are both controlled by hand.
When the system is used for improving combustible materials containing high alkane organic matters, the method comprises the following implementation processes:
opening the first air inlet valve 8, adjusting the flow to a determined value according to the air inflow requirement of subsequent combustible gas using equipment, and reading the flow value by the first combustible gas flowmeter 7;
starting a plasma torch to ignite, igniting the plasma torch, and determining reasonable working current according to the combustible gas flow;
starting the high-pressure air pump 10, adjusting the second air inlet valve 10, and calculating and determining a specific flow value according to the formula (1):
q＝(0.1-0.5)×Q×W×W0×ρ/K0 (1)
wherein: q is the air supplement amount, and the unit is m3Q is the combustible gas flow in m3W is the mass percentage of organic components with more than 3 carbon in the combustible gas,unit is%, W0The oxygen amount per unit mass of the organic components with more than 3 carbon is required for complete combustion, and the unit m is3Rho is the air density under working pressure, in kg/m3，KOIs the mass percentage of oxygen in the air and has the unit of%.
In summary, the invention directly acts on the combustible gas containing high alkane organic matters, properly adds oxygen, decomposes the high alkane organic matters contained in the combustible gas into low alkane organic matters under the high-temperature action of thermal plasma, and finally changes the low alkane organic matters into hydrogen and carbon monoxide to generate combustible gas taking the hydrogen and the carbon monoxide as main components;
because the thermal plasma is adopted to directly act on the gas to be treated, the treatment efficiency is high; and because the temperature in the thermal plasma reaches 3000 ℃, the water and carbon dioxide in the combustible gas can be decomposed, so that the requirement on the control precision of adding oxygen is not high, and the combustible gas containing high-concentration hydrogen and carbon monoxide can be finally generated.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111469517.1A CN114195096B (en) | 2021-12-04 | 2021-12-04 | Method and system for improving combustible gas containing high-alkane organic matter by thermal plasma |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111469517.1A CN114195096B (en) | 2021-12-04 | 2021-12-04 | Method and system for improving combustible gas containing high-alkane organic matter by thermal plasma |
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| Publication Number | Publication Date |
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| CN114195096A true CN114195096A (en) | 2022-03-18 |
| CN114195096B CN114195096B (en) | 2025-03-07 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621743A (en) * | 2003-11-26 | 2005-06-01 | 中国科学院力学研究所 | Plasma multi-stage cracking technology and apparatus capable of processing multiple organic wastes simultaneously |
| JP3127046U (en) * | 2006-09-07 | 2006-11-16 | 周 耀南 | Plasma gas burner |
| CN102671527A (en) * | 2012-06-08 | 2012-09-19 | 无锡市伟奥斯环保科技有限公司 | Temperature-controllable plasma organic exhaust gas treatment device |
| CN103395743A (en) * | 2006-05-05 | 2013-11-20 | 普拉斯科能源Ip控股公司毕尔巴鄂-沙夫豪森分公司 | Gas reformulating system using plasma torch heat |
| WO2020043985A1 (en) * | 2018-08-28 | 2020-03-05 | Europlasma | Method for producing a synthesis gas by treating a gas stream containing co2 and one or more hydrocarbons |
| CN113371679A (en) * | 2021-05-27 | 2021-09-10 | 中国矿业大学 | Carbon dioxide-methane plasma high-temperature reforming device and high-temperature reforming method |
| CN216512854U (en) * | 2021-12-04 | 2022-05-13 | 武汉华科天元环保集团有限公司 | Combustible gas thermal plasma improvement system containing high alkane organic matter |
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2021
- 2021-12-04 CN CN202111469517.1A patent/CN114195096B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621743A (en) * | 2003-11-26 | 2005-06-01 | 中国科学院力学研究所 | Plasma multi-stage cracking technology and apparatus capable of processing multiple organic wastes simultaneously |
| CN103395743A (en) * | 2006-05-05 | 2013-11-20 | 普拉斯科能源Ip控股公司毕尔巴鄂-沙夫豪森分公司 | Gas reformulating system using plasma torch heat |
| JP3127046U (en) * | 2006-09-07 | 2006-11-16 | 周 耀南 | Plasma gas burner |
| CN102671527A (en) * | 2012-06-08 | 2012-09-19 | 无锡市伟奥斯环保科技有限公司 | Temperature-controllable plasma organic exhaust gas treatment device |
| WO2020043985A1 (en) * | 2018-08-28 | 2020-03-05 | Europlasma | Method for producing a synthesis gas by treating a gas stream containing co2 and one or more hydrocarbons |
| CN113371679A (en) * | 2021-05-27 | 2021-09-10 | 中国矿业大学 | Carbon dioxide-methane plasma high-temperature reforming device and high-temperature reforming method |
| CN216512854U (en) * | 2021-12-04 | 2022-05-13 | 武汉华科天元环保集团有限公司 | Combustible gas thermal plasma improvement system containing high alkane organic matter |
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| CN114195096B (en) | 2025-03-07 |
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