CN104449921A - Preparation method of biomass natural gas - Google Patents
Preparation method of biomass natural gas Download PDFInfo
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- CN104449921A CN104449921A CN201410657486.6A CN201410657486A CN104449921A CN 104449921 A CN104449921 A CN 104449921A CN 201410657486 A CN201410657486 A CN 201410657486A CN 104449921 A CN104449921 A CN 104449921A
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Abstract
The invention relates to biomass natural gas and a preparation method thereof and belongs to the field of synthesis of natural gas. The synthesis method of the biomass natural gas, which is disclosed by the invention, has the advantages of wide source of raw materials, low investment, good environmental friendliness, high energy conversion efficiency and the like; due to use of a nickel catalyst taking aluminum oxide and magnesium oxide as carriers, the methanation conversion rate is high. By adopting a three-stage adiabatic fixed bed reactor, the content of obtained methane which is a main component of the biomass natural gas is high. The synthesis method of the biomass natural gas is simple in process and is easy to operate.
Description
Technical field
The present invention relates to a kind of biomass Sweet natural gas preparation method, belong to Sweet natural gas preparing technical field.
Background technology
Along with the fast development of China's economy and the propelling of urbanization process, have high-quality Natural Gas Demand that is clean and environmental protection feature and sharply rise, its ratio in energy structure also increases sharply.Sweet natural gas is the clean fuel that a kind of high heating value is easily carried, and in the consumption of various countries' primary energy source, ratio is more and more higher, expects the year two thousand twenty China and may reach 1000 billion cubic meters to the demand gap of Sweet natural gas.Although China successively implements transfering natural gas from the west to the east, gas east in river send and by signing with Russia, Turkmenistan, Australia etc. the strategic measure that Sweet natural gas supplies agreement, Sweet natural gas is still faced with serious imbalance between supply and demand.
Synthetic natural gas technology is according to methanation reaction principle, utilizes the technology that carbon containing resource conversion is methane by corresponding equipment.Since the thirties in 20th century occurs, its development was once stagnated, but was again valued by the people after the oil crisis of the seventies, and present stage enters the high-speed developing period.The developed countries such as the U.S., Britain, Germany are all in the research carrying out synthetic natural gas technology, but they mainly it can be used as hormone deposit.China is from since the eighties in 20th century, mainly according to the practical situation of town gas development, synthetic natural gas technology is studied, develops many synthesis techniques and associated catalysts, the research and development in these early stages, for the preparation accelerating synthetic natural gas from now on is further laid a good foundation.
The Energy resources feature of China is few oil, lean gas, rich coal.Coal resources relative abundance, make full use of cheap coal resources and produce Sweet natural gas, its energy utilization rate is high, unit calorific value water loss is low, is the important channel solving China's natural gas imbalance between supply and demand.In addition utilize carbonic acid gas and biomass resource to produce Sweet natural gas, not only can widen the Land use systems of carbonic acid gas and biomass, also will greatly reduce the discharge of greenhouse gases simultaneously.In addition, a large amount of coke(oven)gas of the annual by-product of China's coal chemical enterprise, wherein very most of burned, utilization ratio is low, and therefore utilize methanation reaction, the technology producing synthetic natural gas from hydrocarbon tail gas such as pit kiln is also subject to extensive concern.Above synthetic natural gas technology not only can alleviate the market requirement of China's natural gas, reduce the potential risk that inlet natural gas market is brought to China, and to the adjustment of propelling Industry Structure and energy structure optimizing, guarantee national energy security, also there is important strategic importance.
But utilize coal preparing natural gas, coke(oven)gas preparing natural gas all exists the shortcomings such as cost of investment is high, larger, and be considered to a kind of green combustion gas by the Sweet natural gas that biomass-making is standby, can be mixed into transport in existing gas distributing system to use, its application prospect is very considerable.
Biomass are called as biomass synthetic natural gas through the Sweet natural gas that gasification technology prepares, and are also called substitute natural gas, are considered to " s-generation biofuel " technology.This technology is comparatively large for the biomass material scope of application, and in gasification, efficiency of carbon conversion is high, aerogenesis very fast, is applicable to extensive utilization.
It is a relatively new technology that biogas is combined to, and only has the country such as Austria, Holland to carry out the checking of laboratory and pilot scale device, among commercial scale device is being built at present.
Summary of the invention
The present invention, for solving the problem, the invention provides that a kind of technique is simple, easy handling, efficiency are high, utilizes the biological raw materials such as stalk, has carried out method prepared by Sweet natural gas.
It is as follows that the present invention realizes the technology that above-mentioned purpose adopts:
(1) biological raw materials such as stalk are added vapourizing furnace, be under the atmosphere of 53.5-98.6% at oxygen concn, be forced into 0.5-1.5Mpa, logical temperature is the steam of 200-280 DEG C, makes biological raw material gasify as the crude synthesis gas of hydrogen, carbon monoxide, carbonic acid gas, methane;
(2) crude synthesis gas is through centrifugal, filtration, the particulate matter in removing gas, then has the fixed bed of ZnO and CuO through load, by the H in crude synthesis gas
2the acid gas absorption removings such as S;
(3) crude synthesis gas after deacidification is preheated to 280-360 DEG C;
(4) crude synthesis gas after purification enters methanator, temperature rises to 360-400 DEG C, pressure is 3.0-5.0Mpa, adopts three sections of insulation fix bed reactors, reacts under the effect of nickel catalyst, the heat of intersegmental recovery is for the production of high pressure steam, pass into hydrogen, adjustment hydrogen/carbon monoxide ratio=2.5-3, temperature out is 320-350 DEG C, after reaction 4-6h, the main component obtained is the conversion gas mixture of methane, carbonic acid gas, water and impurity component;
(5) the conversion gas mixture obtained is cooled to 0-10 DEG C by condenser, and sprays into methyl alcohol to it, to avoid water vapor condensation to freeze blocking pipe, through gas-liquid separator removing moisture content;
(6) the conversion mixing tank of removing moisture content is passed into separation column, be separated and obtain the synthetic natural gas that methane concentration is 95-99%.
The nickel catalyzator that it is carrier that wherein said nickel catalyst refers to aluminum oxide and magnesium oxide is preferably the nickel catalyzator of carrier with aluminum oxide.
The beneficial effect that the present invention has is:
(1) synthetic method of biomass Sweet natural gas of the present invention, have raw material sources extensively, invest low, good environmental protection, efficient energy conversion advantages of higher;
(2) synthetic method of biomass Sweet natural gas of the present invention, use the nickel catalyzator that aluminum oxide and magnesium oxide are carrier, methanation transformation efficiency is high;
(3) synthetic method of biomass Sweet natural gas of the present invention, adopt three sections of insulation fix bed reactors, the main component methane content obtained is high;
(4) synthetic method of biomass Sweet natural gas of the present invention, simple process, easy handling.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described, and specific embodiment does not limit the present invention.
Embodiment 1: the invention provides a kind of biomass Sweet natural gas and preparation method thereof, realized by following technique:
(1) biological raw materials such as stalk are added vapourizing furnace, be under the atmosphere of 53.5% at oxygen concn, be forced into 0.5Mpa, logical temperature is the steam of 200 DEG C, makes biological raw material gasify as the crude synthesis gas of hydrogen, carbon monoxide, carbonic acid gas, methane;
(2) crude synthesis gas is through centrifugal, filtration, the particulate matter in removing gas, then has the fixed bed of ZnO and CuO through load, by the H in crude synthesis gas
2the acid gas absorption removings such as S;
(3) crude synthesis gas after deacidification is preheated to 280 DEG C;
(4) crude synthesis gas after purification enters methanator, temperature rises to 360 DEG C, pressure is 3.0Mpa, adopts three sections of insulation fix bed reactors, reacts under the effect of nickel catalyst, the heat of intersegmental recovery is for the production of high pressure steam, pass into hydrogen, adjustment hydrogen/carbon monoxide ratio=2.5, temperature out is 320 DEG C, after reaction 4h, the main component obtained is the conversion gas mixture of methane, carbonic acid gas, water and impurity component;
(5) the conversion gas mixture obtained is cooled to 0 DEG C by condenser, and sprays into methyl alcohol to it, to avoid water vapor condensation to freeze blocking pipe, through gas-liquid separator removing moisture content;
(6) the conversion mixing tank of removing moisture content is passed into separation column, be separated and obtain the synthetic natural gas that methane concentration is 95%.
The nickel catalyzator that it is carrier that wherein said nickel catalyst refers to aluminum oxide and magnesium oxide is preferably the nickel catalyzator of carrier with aluminum oxide.
Embodiment 2: the invention provides a kind of biomass Sweet natural gas and preparation method thereof, realized by following technique:
(1) biological raw materials such as stalk are added vapourizing furnace, be under the atmosphere of 55.8% at oxygen concn, be forced into 0.8Mpa, logical temperature is the steam of 240 DEG C, makes biological raw material gasify as the crude synthesis gas of hydrogen, carbon monoxide, carbonic acid gas, methane;
(2) crude synthesis gas is through centrifugal, filtration, the particulate matter in removing gas, then has the fixed bed of ZnO and CuO through load, by the H in crude synthesis gas
2the acid gas absorption removings such as S;
(3) crude synthesis gas after deacidification is preheated to 300 DEG C;
(4) crude synthesis gas after purification enters methanator, temperature rises to 370 DEG C, pressure is 3.0Mpa, adopts three sections of insulation fix bed reactors, reacts under the effect of nickel catalyst, the heat of intersegmental recovery is for the production of high pressure steam, pass into hydrogen, adjustment hydrogen/carbon monoxide ratio=2.6, temperature out is 330 DEG C, after reaction 4h, the main component obtained is the conversion gas mixture of methane, carbonic acid gas, water and impurity component;
(5) the conversion gas mixture obtained is cooled to 5 DEG C by condenser, and sprays into methyl alcohol to it, to avoid water vapor condensation to freeze blocking pipe, through gas-liquid separator removing moisture content;
(6) the conversion mixing tank of removing moisture content is passed into separation column, be separated and obtain the synthetic natural gas that methane concentration is 96%.
The nickel catalyzator that it is carrier that wherein said nickel catalyst refers to aluminum oxide and magnesium oxide;
Embodiment 3: the invention provides a kind of biomass Sweet natural gas and preparation method thereof, realized by following technique:
(1) biological raw materials such as stalk are added vapourizing furnace, be under the atmosphere of 77.2% at oxygen concn, be forced into 1.2Mpa, logical temperature is the steam of 270 DEG C, makes biological raw material gasify as the crude synthesis gas of hydrogen, carbon monoxide, carbonic acid gas, methane;
(2) crude synthesis gas is through centrifugal, filtration, the particulate matter in removing gas, then has the fixed bed of ZnO and CuO through load, by the H in crude synthesis gas
2the acid gas absorption removings such as S;
(3) crude synthesis gas after deacidification is preheated to 320 DEG C;
(4) crude synthesis gas after purification enters methanator, temperature rises to 390 DEG C, pressure is 4.6Mpa, adopts three sections of insulation fix bed reactors, reacts under the effect of nickel catalyst, the heat of intersegmental recovery is for the production of high pressure steam, pass into hydrogen, adjustment hydrogen/carbon monoxide ratio=2.9, temperature out is 340 DEG C, after reaction 5h, the main component obtained is the conversion gas mixture of methane, carbonic acid gas, water and impurity component;
(5) the conversion gas mixture obtained is cooled to 8 DEG C by condenser, and sprays into methyl alcohol to it, to avoid water vapor condensation to freeze blocking pipe, through gas-liquid separator removing moisture content;
(6) the conversion mixing tank of removing moisture content is passed into separation column, be separated and obtain the synthetic natural gas that methane concentration is 98%.
The nickel catalyzator that it is carrier that wherein said nickel catalyst refers to aluminum oxide and magnesium oxide is preferably the nickel catalyzator of carrier with aluminum oxide.
Embodiment 4: the invention provides a kind of biomass Sweet natural gas and preparation method thereof, realized by following technique:
(1) biological raw materials such as stalk are added vapourizing furnace, be under the atmosphere of 98.6% at oxygen concn, be forced into 1.5Mpa, logical temperature is the steam of 280 DEG C, makes biological raw material gasify as the crude synthesis gas of hydrogen, carbon monoxide, carbonic acid gas, methane;
(2) crude synthesis gas is through centrifugal, filtration, the particulate matter in removing gas, then has the fixed bed of ZnO and CuO through load, by the H in crude synthesis gas
2the acid gas absorption removings such as S;
(3) crude synthesis gas after deacidification is preheated to 360 DEG C;
(4) crude synthesis gas after purification enters methanator, temperature rises to 400 DEG C, pressure is 5.0Mpa, adopts three sections of insulation fix bed reactors, reacts under the effect of nickel catalyst, the heat of intersegmental recovery is for the production of high pressure steam, pass into hydrogen, adjustment hydrogen/carbon monoxide ratio=3, temperature out is 350 DEG C, after reaction 6h, the main component obtained is the conversion gas mixture of methane, carbonic acid gas, water and impurity component;
(5) the conversion gas mixture obtained is cooled to 10 DEG C by condenser, and sprays into methyl alcohol to it, to avoid water vapor condensation to freeze blocking pipe, through gas-liquid separator removing moisture content;
(6) the conversion mixing tank of removing moisture content is passed into separation column, be separated and obtain the synthetic natural gas that methane concentration is 99%.
The nickel catalyzator that it is carrier that wherein said nickel catalyst refers to aluminum oxide and magnesium oxide is preferably the nickel catalyzator of carrier with aluminum oxide.
Claims (8)
1. a biomass Sweet natural gas preparation method, is characterized in that:
1) biological raw materials such as stalk are added vapourizing furnace, pressurize under aerobic conditions, logical high-temperature steam, make biological raw material gasify as the crude synthesis gas of hydrogen, carbon monoxide, carbonic acid gas, methane;
2) crude synthesis gas is through centrifugal, filtration, the particulate matter in removing gas, then through fixed bed by the H in crude synthesis gas
2the acid gas absorption removings such as S;
3) crude synthesis gas after deacidification is preheated to 280-360 DEG C;
4) crude synthesis gas after purification enters methanator, adopt three sections of insulation fix bed reactors, react under the effect of catalyzer, the heat of intersegmental recovery is for the production of high pressure steam, pass into hydrogen, adjustment hydrogen/carbon monoxide ratio, after reaction 4-6h, the main component obtained is the conversion gas mixture of methane, carbonic acid gas, water and impurity component;
5) the conversion gas mixture obtained is cooled to 0-10 DEG C by condenser, and sprays into methyl alcohol to it, to avoid water vapor condensation to freeze blocking pipe, through gas-liquid separator removing moisture content;
6) the conversion mixing tank of removing moisture content is passed into separation column, be separated and obtain the synthetic natural gas that methane concentration is 95-99%.
2. a kind of biomass Sweet natural gas preparation method according to claim 1, is characterized in that: step 1) in pressurize under aerobic conditions, oxygen concn is 53.5-98.6%, is forced into 0.5-1.5Mpa.
3. a kind of biomass Sweet natural gas preparation method according to claim 1, is characterized in that: step 1) in the high-temperature steam temperature that passes into be 200-280 DEG C.
4. a kind of biomass Sweet natural gas preparation method according to claim 1, is characterized in that: step 2) described in fixed bed be the fixed bed that load has ZnO and CuO.
5. a kind of biomass Sweet natural gas preparation method according to claim 1, is characterized in that: step 4) in purification after crude synthesis gas enter methanator, temperature rises to 360-400 DEG C, and pressure is 3.0-5.0Mpa.
6. a kind of biomass Sweet natural gas preparation method according to claim 1, is characterized in that: step 4) middle adjustment hydrogen/carbon monoxide ratio=2.5-3.
7. a kind of biomass Sweet natural gas preparation method according to claim 1, is characterized in that: step 4) described in the catalyzer nickel catalyzator that to refer to aluminum oxide or magnesium oxide be carrier.
8. a kind of biomass Sweet natural gas preparation method according to claim 1, is characterized in that: step 4) in adjustment hydrogen/carbon monoxide ratio temperature out be 320-350 DEG C.
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| CN201410657486.6A CN104449921A (en) | 2014-11-17 | 2014-11-17 | Preparation method of biomass natural gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105713672A (en) * | 2016-04-29 | 2016-06-29 | 云南师范大学 | Preparation technique of new energy combustible gas |
| CN106010700A (en) * | 2016-07-19 | 2016-10-12 | 重庆化工设计研究院 | Low-carbon acid gas removal technique and system for high methane gas |
| CN111363570A (en) * | 2020-03-20 | 2020-07-03 | 同济大学 | Method for preparing methane-rich gas by using waste |
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| CN101851537A (en) * | 2010-06-21 | 2010-10-06 | 上海浦景化工技术有限公司 | Method and device for preparing synthetic natural gas |
| CN102660339A (en) * | 2012-04-27 | 2012-09-12 | 阳光凯迪新能源集团有限公司 | Gas-steam efficient cogeneration process and system based on biomass gasification and methanation |
| CN103242922A (en) * | 2013-05-31 | 2013-08-14 | 青岛新奥胶城燃气有限公司 | Method for preparing fuel gas by burning biomass |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101851537A (en) * | 2010-06-21 | 2010-10-06 | 上海浦景化工技术有限公司 | Method and device for preparing synthetic natural gas |
| CN102660339A (en) * | 2012-04-27 | 2012-09-12 | 阳光凯迪新能源集团有限公司 | Gas-steam efficient cogeneration process and system based on biomass gasification and methanation |
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Non-Patent Citations (1)
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| 武宏香 等: "生物质气化制备合成天然气技术的研究进展", 《化工进展》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105713672A (en) * | 2016-04-29 | 2016-06-29 | 云南师范大学 | Preparation technique of new energy combustible gas |
| CN106010700A (en) * | 2016-07-19 | 2016-10-12 | 重庆化工设计研究院 | Low-carbon acid gas removal technique and system for high methane gas |
| CN106010700B (en) * | 2016-07-19 | 2019-02-26 | 重庆化工设计研究院有限公司 | A kind of low-carbon acidity gas removal method and system of high methane gas |
| CN111363570A (en) * | 2020-03-20 | 2020-07-03 | 同济大学 | Method for preparing methane-rich gas by using waste |
| CN111363570B (en) * | 2020-03-20 | 2021-11-09 | 同济大学 | Method for preparing methane-rich gas by using waste |
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Application publication date: 20150325 |
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