CN102154034B - Co-transformation catalytic gasification method for tobacco straw waste and coal - Google Patents
Co-transformation catalytic gasification method for tobacco straw waste and coal Download PDFInfo
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- CN102154034B CN102154034B CN 201110067029 CN201110067029A CN102154034B CN 102154034 B CN102154034 B CN 102154034B CN 201110067029 CN201110067029 CN 201110067029 CN 201110067029 A CN201110067029 A CN 201110067029A CN 102154034 B CN102154034 B CN 102154034B
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Abstract
The invention discloses a co-transformation catalytic gasification method for tobacco straw waste and coal. The method is characterized by comprising the following process steps: pre-treating straw; and converting the pretreated straw into solid biomass coke by pyrolysis, smashing, wet-mixing the smashed straw with the coal, drying, gasifying in a gasification furnace, and collecting gasified product which is used as a fuel gas or a synthesis gas. The invention has the advantages: 1, coal coke gasifying reaction is catalyzed by using potassium enriched in tobacco straw while carrying out co-transformation on the tobacco straw and the coal, so that tobacco biomass becomes a catalyst which is efficient in coal gasification, is cheap and dose not need to be recovered; 2, the potassium in thetobacco straw is mainly enriched in the solid biomass coke by using a relative mild pyrolysis process, wet mixing is further carried out on the potassium-enriched biomass coke and the coal, thereby being beneficial to the fact that dissolving out the potassium enriched in the solid is dissolved out and then transferred and dispersed to the coal and improving the catalytic effect in the gasification process; and 3, coke oil generated in the pyrolysis process of the tobacco straw can also be used as a raw material for extracting special chemicals to be subsequently utilized, thereby improving ause value.
Description
Technical field
The present invention relates to the utilization of tobacco waste, relate in particular to the method for a kind of tabacco straw waste and coal cotransformation catalytic gasification.
Background technology
Biomass energy as the CO2 zero release is one of Chinese most important renewable energy source, accounts for 67% (" Chinese renewable energy source industry development report (2006) ") of renewable energy source total amount.Because the composition of biomass is hydrocarbon polymers, form similar with the fossil oil that coal, oil etc. are conventional, its characteristic and utilize mode and mineral fuel that very big similarity is arranged, with biomass part alternative ore fuel, be to reduce the ideal style of CO2 discharging (Wu creates it, cloudy beautiful. the present Research of European biomass utilization and characteristics. the bioenergy technology, 1999(21)).The available tobacco biomass aboundresources of the annual output of China in the time of nearly 3,000,000 t of annual output tobacco leaf, can be followed the suitable tabacco straw resource of output and yield of tobacco.At present, the tabacco straw resource is mostly directly thrown aside in the field as solid waste, or burning, landfill, has caused the great wasting of resources, also contaminate environment easily.To discard the utilization of tobacco biomass energy resource, not only can produce remarkable economic efficiency, and also can reduce discharging the CO2 of China and make certain contribution.Yet the dispersed and low energy density of resource has limited the mass-producing utilization of biomass as single or main fuel to a certain extent.Utilizing the coal conversion that has now developed to utilize technology and equipment, with biomass and coal cotransformation, is the effective way that solves the utilization of abandoned biomass resource low-coat scale.
As happiness potassium crop, alkali (soil) metal content such as potassium is particularly abundant in the tobacco biomass, is typical rich potassium biomass.The content that K2O has reached 45%, CaO in the ash content in the flue-cured tobacco stalk is also nearly 17%, and the K2O in the ash content, CaO add up to the 7%-8% that accounts for the butt biomass, and content is very considerable.Alkali (soil) metal, especially potassium is the most effective catalyzer of coal gasification reaction (Mochida I, Sakanishi K. Catalysts for coal conversions of the next generation. Fuel, 2000,79 (3-4): 221-228).Catalytic gasification is owing to can significantly improve the composition of gasification rate, reduction gasification temperature, orientation adjustment product gas, it is the important development direction of clean coal utilization gordian technique-Coal Gasification Technology, but the factors such as secondary pollution that the interpolation cost of catalyzer, the recovery of noble metal catalyst and grey processing may bring are restricting coal catalytic gasification Industrial Application of Technology (Liao Hongqiang always, Deng Demin, Li Baoqing. catalytic coal gasifaction progress and coal-black liquor gasify altogether. coal conversion, 2000,23 (3): 1-5).Characteristics based on the rich potassium of tobacco biomass, with tabacco straw and coal cotransformation, not only can make biomass resource can partly substitute the use of fossil oil to reduce the CO2 discharging, simultaneously if utilize the potassium catalysis char gasification reaction of being rich in the tabacco straw in the process utilizing altogether, then make tobacco biomass become efficient, the cheap and catalyzer source that need not to reclaim of gasification.Tabacco straw and coal cotransformation are used to the method that the catalysis char gasification reacts, have not yet to see the open source literature report.
Summary of the invention
What purpose of the present invention provided a kind of tabacco straw waste and coal cotransformation just at the deficiencies in the prior art utilizes method and technology.This method is based on the characteristics of the rich potassium of tabacco straw waste and biomass high volatile, low charcoal, earlier the potassium that has high catalytic activity in the tabacco straw is enriched in the biomass char, and then with the solid phase of enrichment potassium with carry out common gasification after coal fully mixes, utilize potassium catalysis coal gasification reaction.
The objective of the invention is to be achieved through the following technical solutions:
The method of tabacco straw waste and coal cotransformation catalytic gasification comprises following processing step:
1) at first the tabacco straw of collecting is dried, pulverization process;
2) tabacco straw after will handling is quantitatively sent into a pyrolysis installation, and stalk particle is converted into pyrolysis gas, tar and solid phase biological matter Jiao through low temperature pyrogenation;
3) solid phase biological matter Jiao is pulverized;
4) biomass char and the coal after will pulverizing sent into mixing device, by adding quantitative water biomass char and coal carried out wet-mixed in this device;
5) material after the wet-mixed is sent into a drying installation, and material drying to water ratio is lower than 10%;
6) dried material is sent in the vapourizing furnace and is gasified, and gasification product can be used as fuel gas or synthetic gas uses.
Tabacco straw in the step 1) is through drying naturally, and tentatively is broken for the stalk particle less than 5cm.
Step 2) pyrolysis installation described in is moving bed pyrolysis device or fluidized bed pyrolysis device, and pyrolysis temperature is at 450-750
oC.
Pulverization process is that solid phase biological matter Jiao is sent into a shredding unit in the step 3), is crushed to granularity less than 40 orders.
Biomass char in the step 4), the weight ratio of coal are 1:5～1:10, and the water addition ratio example is the 30%-80% of solid phase.
Drying installation described in the step 5) is belt, van-type or roller drying device, and drying temperature is lower than 200
oC.
Vapourizing furnace described in the step 6) is fluidized-bed gasification device or gas-flow bed gasifying apparatus, is vaporized chemical with air (or oxygen), steam, gasification temperature 700-1200
oC.
The invention has the advantages that:
1, in the time of with tabacco straw and coal cotransformation, utilizes the potassium catalysis char gasification reaction of being rich in the tabacco straw, then make tobacco biomass become efficient, the cheap and catalyzer that need not to reclaim of gasification.
2, adopt gentle relatively pyrolytic process, potassium in the tabacco straw mainly is enriched among solid phase biological matter Jiao, further carry out wet-mixed with coal, the potassium stripping and the migration that are conducive to enrichment in the solid phase are dispersed in the coal, can improve the catalytic effect in the gasification.
3, the tar that produces of tabacco straw pyrolytic process also can be used as the raw material that extracts speciality chemical and carries out later use, improves use value.
Description of drawings
Fig. 1 is process route view of the present invention.
Embodiment
Below in conjunction with embodiment (accompanying drawing) the present invention is done and to describe in further detail.
Embodiment 1
1, at first the tabacco straw of collecting is dried naturally, and tentatively be broken for stalk particle less than 5cm;
2, pretreated tabacco straw is quantitatively sent into a moving bed pyrolysis device, stalk particle is converted into pyrolysis gas, tar and solid phase biological matter Jiao through low temperature pyrogenation;
3, solid phase biological matter Jiao is sent into a shredding unit, further be crushed to granularity less than 40 orders;
4, biomass char and the coal after will pulverizing sent into mixing device, by adding quantitative water biomass char and coal carried out wet-mixed in this device; The blending ratio of biomass char and coal is 1:5, and the water addition ratio example is 35% of solid phase.
5, the material after the wet-mixed is sent into the drum drying device, and drying temperature is lower than 200 ℃.Material is lower than 10% through suitably being dried to water ratio;
6, dried material is sent in the fluidized-bed gasification furnace and is gasified, and is vaporized chemical with air, steam, gasification temperature 800
oAbout C, the gasification product of collection can be used as fuel gas and uses.
After testing, this gasification product main component is 13%H
2, 24%CO, 8%CO2,52%N
2
Embodiment 2
1, at first the tabacco straw of collecting is dried naturally, and tentatively be broken for stalk particle less than 5cm;
2, pretreated tabacco straw is quantitatively sent into a fluidized-bed pyrolysis installation, stalk particle is converted into pyrolysis gas, tar and solid phase biological matter Jiao through low temperature pyrogenation;
3, solid phase biological matter Jiao is sent into a shredding unit, further be crushed to granularity less than 40 orders;
4, biomass char and the coal after will pulverizing sent into mixing device, by adding quantitative water biomass char and coal carried out wet-mixed in this device; The blending ratio of biomass char and coal is 1:9, and the water addition ratio example is 80% of solid phase.
5, the material after the wet-mixed is sent into the carriage-type drying device, and drying temperature is lower than 200 ℃.Material is lower than 10% through suitably being dried to water ratio;
6, dried material is sent in the airflow bed gasification furnace and is gasified, and is vaporized chemical with oxygen, steam, gasification temperature 1100
oAbout C, the gasification product of collection can be used as fuel gas or synthetic gas uses.
After testing, this gasification product main component is 35%H
2, 46%CO, 12%CO
2
Claims (2)
1. the method for a tabacco straw waste and coal cotransformation catalytic gasification is characterized in that: comprise following processing step:
1) at first the tabacco straw of collecting is dried, pulverization process;
2) tabacco straw after will handling is quantitatively sent into a pyrolysis installation, and stalk particle is converted into pyrolysis gas, tar and solid phase biological matter Jiao through low temperature pyrogenation, and described pyrolysis installation is moving bed pyrolysis device or fluidized bed pyrolysis device, and pyrolysis temperature is at 450-750 ℃;
3) solid phase biological matter Jiao is pulverized, Jiao sends into a shredding unit with solid phase biological matter, is crushed to granularity less than 40 orders;
4) biomass char and the coal after will pulverizing sent into mixing device, by adding quantitative water biomass char and coal carried out wet-mixed in this device, and the weight ratio of described biomass char, coal is 1:5～1:10, and the water addition ratio example is the 30%-80% of solid phase;
5) material after the wet-mixed is sent into a drying installation, and material drying to water ratio is lower than 10%, and described drying installation is belt, van-type or roller drying device, and drying temperature is lower than 200 ℃;
6) dried material is sent in the vapourizing furnace and is gasified, and described vapourizing furnace is fluidized-bed gasification device or gas-flow bed gasifying apparatus, is vaporized chemical with air, steam, gasification temperature 700-1200 ℃; Collect the gasification product gas that acts as a fuel.
2. the method for tabacco straw waste according to claim 1 and coal cotransformation catalytic gasification is characterized in that: tabacco straw is through drying naturally, and tentatively is broken for the stalk particle less than 5cm.
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| CN108977229A (en) * | 2017-08-01 | 2018-12-11 | 华东理工大学 | Air flow bed coal dust hydro-gasification process |
| CN110037333A (en) * | 2019-04-19 | 2019-07-23 | 浙江中烟工业有限责任公司 | The method and its application of aroma component are extracted in a kind of tobacco destructive distillation |
| CN110788110A (en) * | 2019-09-28 | 2020-02-14 | 中原环资科技有限公司 | Process method for comprehensively utilizing straws |
| CN110835552A (en) * | 2019-11-05 | 2020-02-25 | 新奥科技发展有限公司 | Coal hydro-gasification method |
| CN113698961A (en) * | 2020-05-22 | 2021-11-26 | 中国石油化工股份有限公司 | Method for catalytic gasification by using natural potassium and sodium elements in coal |
| CN113308277A (en) * | 2021-05-27 | 2021-08-27 | 内蒙古工业大学 | Application of sunflower straw ash in catalyzing steam gasification of medium-low-rank coal |
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| CN1557919A (en) * | 2004-01-18 | 2004-12-29 | 江苏大学 | Gasification method and device for biomass and coal mixed fluidized-bed |
| CN101962574A (en) * | 2010-09-30 | 2011-02-02 | 华东理工大学 | Clean synthesis gas and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1557919A (en) * | 2004-01-18 | 2004-12-29 | 江苏大学 | Gasification method and device for biomass and coal mixed fluidized-bed |
| CN101962574A (en) * | 2010-09-30 | 2011-02-02 | 华东理工大学 | Clean synthesis gas and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 宋新朝等.流化床生物质与煤共气化特性的初步研究.《燃料化学学报》.2006,第34卷(第3期), |
| 施勇.秸秆类生物质低温热解及混合气化的研究.《上海化工》.2010,第35卷(第8期),第6-11页. |
| 流化床生物质与煤共气化特性的初步研究;宋新朝等;《燃料化学学报》;20060630;第34卷(第3期);第303页至第308页 * |
| 秸秆类生物质低温热解及混合气化的研究;施勇;《上海化工》;20100831;第35卷(第8期);第6页至第11页 * |
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