CN101457165A - Coal water slurry made by combining lincomycin wet bacteria slag and coal - Google Patents
Coal water slurry made by combining lincomycin wet bacteria slag and coal Download PDFInfo
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- CN101457165A CN101457165A CNA2009100640721A CN200910064072A CN101457165A CN 101457165 A CN101457165 A CN 101457165A CN A2009100640721 A CNA2009100640721 A CN A2009100640721A CN 200910064072 A CN200910064072 A CN 200910064072A CN 101457165 A CN101457165 A CN 101457165A
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Abstract
The invention relates to a coal water slurry combined by a lincomycin wet bacteria slag and coal which effectively settles the application of the lincomycin wet bacteria slag and prevents the pollution problem to environment. The settled technical scheme comprises the following steps: the coal water slurry is prepared by the lincomycin wet bacteria slag, a coal dust, an additive agent and water, wherein the weight ratio of the lincomycin wet bacteria slag and the coal dust is:5-50% of lincomycin wet bacteria slag,50-95% of coal dust, then sum of the lincomycin wet bacteria slag and coal dust is 50-70%,the additive agent is 0. 1-5% and water balance by weight percentage,firstly the additive agent,water and lincomycin wet bacteria slag are mixed and stirred to a uniform mixture solution, then the coal dust is added in the mixture solution to mix uniformly and the coal water slurry with a mass concentration of 50-70% containing the lincomycin wet bacteria slag and the coal dust is obtained.The coal water slurry has simple component and low cost, and is easy to produce.The incomycin wet bacteria slag is fully used, not only the novel fuel source is solved and a great deal of coal is saved, but also the pollution to environment by incomycin wet bacteria slag is prevented. The coal water slurry of the invention has a huge economy and social benefit.
Description
One, technical field
The present invention relates to the fuel field, particularly a kind of lincomycin wet bacteria slag cooperates the coal water slurry of system with coal.
Two, background technology
Coal slurry fuel the mid-1970s in last century grows up under the pressure of the impact of oil crisis.Coal slurry fuel has less investment, processes easyly, and satisfactory stability and flowability are easy to load and unload, store, carry and the characteristics of direct spray burning.Can be widely used in replacing oil combustion on Industrial Boiler, station boiler, the Industrial Stoves, also can be used as gasified raw material and be used for chemical fields such as synthetic ammonia, synthesizing methanol, urea synthesis.The coal slurry fuel technology is the clean coal technology that is fit to China's national situation, and development and use coal slurry combustion technology is significant to guaranteeing China's energy and sustainable economic development.
At present, the coal slurry fuel developed of countries in the world mainly contains: coal oil mixture, coal water slurry, oil coal water mixture and methyl alcohol coal slurry.Coal oil mixture is the coal fuel that develops the earliest, and the application of coal-oil mixed fuel in 1897 patents first.Because coal oil mixture can only replace 50% oil, the cost height of coal slurry is second-rate, so not paid attention to by the people.Slow down basically or stopped research and application and development to coal oil mixture in various countries to the later stage eighties 20th century.
Coal water slurry is one of clean coal technology, it is actually the coal dust of certain particle size by a certain percentage (70%, wt) with water (29%, wt) and a certain amount of chemical additive (about 1%) mix, form have high density, suitable viscosity, the reasonable stabilized fluid of size distribution.It is in transportation, and aspect such as storage, burning and heavy oil are about the same, are better than the solid coal significantly, it is a kind of comparatively ideal replacement for heavy burnt fuel, in addition, because the cool water mixture burning temperature is generally hanged down 100-200 ℃ than fuel oil and coal dust, help control and reduce NO
xAnd SO
2Generation; With the high-concentration coal-water slurry of cleaned coal preparation, the ash content of itself, sulphur content are low, and blowdown flow rate is few relatively, and environment protecting is obvious.Through the research and development of the seventies to the eighties in 20th century, the application of coal water slurry has at present reached the degree of practicability.
Oil coal water mixture is a kind of novel coal-based generation flow of oil fuel that grows up after coal oil mixture and coal water slurry.Oil coal water mixture is made up of oil, coal, water and trace mineral supplement.According to the outer phase composite of coal slurry, can be divided into oil base and water base two kinds again.It contains the coal amount generally all at 35%-50%, and the content of water is not less than 15%.Have data to show, compare with coal oil mixture and coal water slurry, this ternary mixed fuel has easily to be lighted, the calorific value height, saves with advantages such as oil, viscosity are lower.People such as Su Hongwen have developed a kind of oil coal water mixture with emulsifying agent, the dispersion-ness surface activity agent of 0.1%-0.5% and the stablizer of 0.1%-0.5% of the coal dust 1%-2% of the water of the oil of 20%-30%, 7%-30%, 40%-70%.This fuel thermal efficiency height, discharge that harmful flue dust is few, environmental pollution is little, has distinct economic and social benefit.
In addition, Hu Qinhai tests by thermogravimetric, has analyzed the combustioncharacteristics of mixed pulp behind the municipal sludge of blending different mass ratio in the single ignition quality of mud, coal water slurry and the coal water slurry.Discover that the combustioncharacteristics aggregate performance is the acting in conjunction of mud and coal water slurry, be better than the single burning of mud or coal water slurry in some aspects.In a word, utilizing the wet direct blending coal water slurry of mud is feasible from combustioncharacteristics.
Particularly along with global energy shortage, developing the new energy is paid attention to by people, and carried out many-sided research, particularly how the waste that is produced in the industrial production is realized effective utilization, prevent pollution to environment, people's technical problem to be solved as how a large amount of slag that produces in the lincomycin production process is effectively utilized, prevents pollution on the environment especially.
At present, to producing a large amount of wet bacteria slags in the process of lincomycin production, major part is the additive that directly is used as animal-feed.But owing to contain a spot of pharmaceutical cpd in the lincomycin wet bacteria slag, bitter and some other side effect, so country forbids slag as fodder additives; National departments concerned is listed the bacterium slag in danger wastes as the industrial solid castoff with utilizing that is difficult to administer in addition.In view of above various reasons, utilize the combustibility of lincomycin wet bacteria slag, it is mixed and made into coal water slurry according to certain ratio and coal dust, the consumption of coal in the time of so not only can reducing the preparation coal water slurry, reduce production costs, open up the new energy, and can alleviate the pressure that environment is polluted, be the most effective to present lincomycin wet bacteria slag, optimal utilization.
Three, summary of the invention
At above-mentioned situation, for overcoming the prior art defective, the present invention's purpose just provides a kind of lincomycin wet bacteria slag cooperates system with coal coal water slurry, can effectively solve the utilization of lincomycin fungi residues, prevent the pollution on the environment problem, the technical scheme of its solution is, this coal water slurry is by the lincomycin wet bacteria slag, coal dust, additive and water are made, wherein, the weight percent of lincomycin wet bacteria slag and coal dust is: lincomycin wet bacteria slag 5-50%, coal dust 50-95%, and then by weight percentage: lincomycin wet bacteria slag and coal dust and be 50-70%, additive 0.1-5%, surplus is a water, earlier with additive, water, lincomycin wet bacteria slag mixing and stirring becomes mixed solution, again coal dust is added in the mixed solution, mixing is made and is contained the lincomycin wet bacteria slag and quality of pc concentration is the coal water slurry of 50-70%, said additive is the additive that is applicable to coal water slurry, as anionic slurries additive agent and non-ionic type slurries additive agent, its adding can change the slurry performance of coal water slurry to a certain extent, satisfy the requirement of vapourizing furnace or roasting kiln, said anionic slurries additive agent, comprise: all kinds of substituting group poly naphthalene sulfonate series, sulfonated lignin, humate and sulfonation humate series, polyolefin series, carboxylate salt and series of phosphate, any in the oleic series, the non-ionic type slurries additive agent, comprise: polyoxyethylene series, any in the polyoxy ethane series, said coal dust is (to remove peat by the coal dust that coal is made through pulverizing, beyond the brown coal), the add-on of water can be according to the size and the coal sample quality of coal water slurry mass concentration in the component of the present invention, how much moisture in the coal dust decides, and is provided by following formula:
In the formula X be water and additive quality and; Mad (air dried basis) is the moisture in the coal dust, ad (air dry) is an air dried basis, component of the present invention is simple, cost is low, easily produces, and can make full use of the lincomycin wet bacteria slag, both solved new fuel source, saved a large amount of coals, prevented lincomycin wet bacteria slag pollution on the environment again, huge economic and social benefit has been arranged.
Four, embodiment
Below in conjunction with embodiment the specific embodiment of the present invention is elaborated.
Embodiment 1: preparation lincomycin wet bacteria slag and quality of pc concentration are 63% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 63%, additive and water and be 37%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 90%, lincomycin wet bacteria slag 10%, additive be coal water slurry weight 1.5%, water is that 35.5% of coal water slurry weight is made, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir.
Embodiment 2: preparation lincomycin wet bacteria slag and quality of pc concentration are 64% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 64%, additive and water and be 36%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 90%, lincomycin wet bacteria slag 10%, additive be coal water slurry weight 1.5%, water is that 34.5% of coal water slurry weight is made, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir.
Embodiment 3: preparation lincomycin wet bacteria slag and quality of pc concentration are 65% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 65%, additive and water and be 35%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 95%, lincomycin wet bacteria slag 5%, additive be coal water slurry weight 1.5%, water is that 33.5% of coal water slurry weight is made, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir.
Embodiment 4: preparation lincomycin wet bacteria slag and quality of pc concentration are 70% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 70%, additive and water and be 30%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 95%, lincomycin wet bacteria slag 5%, additive be coal water slurry weight 2%, water is that 28% of coal water slurry weight is made, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir.
Embodiment 5: preparation lincomycin wet bacteria slag and quality of pc concentration are 60% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 60%, additive and water and be 40%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 85%, lincomycin wet bacteria slag 15%, additive be coal water slurry weight 4%, water is that 36% of coal water slurry weight is made, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir.
Embodiment 6: preparation lincomycin wet bacteria slag and quality of pc concentration are 55% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 55%, additive and water and be 45%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 80%, lincomycin wet bacteria slag 20%, additive be coal water slurry weight 5%, water is that 40% of coal water slurry weight is made, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir.
Embodiment 7: preparation lincomycin wet bacteria slag and quality of pc concentration are 50% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 50%, additive and water and be 50%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 75%, lincomycin wet bacteria slag 25%, additive be coal water slurry weight 1.5%, water is that 48.5% of coal water slurry weight is made, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir.
Embodiment 8: preparation lincomycin wet bacteria slag and quality of pc concentration are 50% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 50%, additive and water and be 50%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 70%, lincomycin wet bacteria slag 30%, additive be coal water slurry weight 5%, water is that 45% of coal water slurry weight is made, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir.
Embodiment 9: preparation lincomycin wet bacteria slag and quality of pc concentration are 50% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 50%, additive and water and be 50%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 65%, lincomycin wet bacteria slag 35%, additive be coal water slurry weight 5%, water is that 45% of coal water slurry weight is made, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir.
Embodiment 10: make 100 tons (100000kg) heavy coal water slurry, be to make for 35.5 tons by 56.7 tons in coal, 13.3 tons of lincomycin wet bacteria slags, 1.5 tons of additives, water, wherein, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir, the coal water slurry of 100 tons of weights.
Embodiment 11: make 10 tons (10000kg) heavy coal water slurry, be to make for 2.7 tons by 6.65 tons in coal, 0.35 ton of lincomycin wet bacteria slag, 0.3 ton of additive, water, wherein, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir, the coal water slurry of 10 tons of weights.
By the component ratio that the present invention provides, can prepare the coal water slurry of any amount, specifically enumerate no longer one by one.The present invention also can effectively be applied to antibiotic bacterium dregs such as gentamicin, Avrmectin, penicillin and all can utilize the inventive method to handle, as long as the lincomycin wet bacteria slag is replaced all can by antibiotic bacterium dregs such as gentamicin, Avrmectin, penicillin.
The present invention has obtained satisfied effect after tested, and concrete test case is as follows:
Table 1 HB037 coal list coal slurrying data sheet
Table 2 lincomycin wet bacteria slag and HB037 coal preparation slurry data sheet
By above-mentioned situation as can be seen, the lincomycin wet bacteria slag cooperates slurrying with coal, and slurrying concentration is higher, and the bleed rate is lower, and slurry stability is better, can free-fall insertion, satisfy the requirement of vapourizing furnace or roasting kiln.Therefore, the handling problem that lincomycin wet bacteria slag and coal dust mixed pulp have not only been solved useless bacterium slag, and reduced production cost, be a kind of novel fuel, be effective to vapourizing furnace or roasting kiln, through test, energy-saving effect is huge, only 1.2 ten thousand tons of lincomycin wet bacteria slags is made coal water slurry, can be sparing in the use of coal more than 1.2 ten thousand tons, it is the excellent effect that middle unanticipated on probation arrives, solved lincomycin wet bacteria slag pollution on the environment, long-time insurmountable technical barrier had both been realized the utilization of refuse, having opened the new energy again, is that one on the lincomycin wet bacteria slag is handled created greatly.
Claims (9)
1, a kind of lincomycin wet bacteria slag cooperates the coal water slurry of system with coal, it is characterized in that, by the lincomycin wet bacteria slag, coal dust, additive and water are made, wherein, the weight percent of lincomycin wet bacteria slag and coal dust is: lincomycin wet bacteria slag 5-50%, coal dust 50-95%, and then by weight percentage: lincomycin wet bacteria slag and coal dust and be 50-70%, additive 0.1-5%, surplus is a water, earlier with additive, water, lincomycin wet bacteria slag mixing and stirring becomes mixed solution, coal dust is added in the mixed solution, mixing is made and is contained the lincomycin wet bacteria slag and quality of pc concentration is the coal water slurry of 50-70% again.
2, lincomycin wet bacteria slag according to claim 1 cooperates the coal water slurry of system with coal, it is characterized in that, said additive is anionic slurries additive agent and non-ionic type slurries additive agent, the anionic slurries additive agent is any in all kinds of substituting group poly naphthalene sulfonate series, sulfonated lignin, humate and sulfonation humate series, polyolefin series, carboxylate salt and series of phosphate, the oleic series, and the non-ionic type slurries additive agent is any in polyoxyethylene series, the polyoxy ethane series.
3, lincomycin wet bacteria slag according to claim 1 cooperates the coal water slurry of system with coal, it is characterized in that, preparation lincomycin wet bacteria slag and quality of pc concentration are 63% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 63%, additive and water and be 37%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 90%, lincomycin wet bacteria slag 10%, additive is 1.5% of a coal water slurry weight, water is that 35.5% of coal water slurry weight is made, earlier with additive, water, lincomycin wet bacteria slag mixing and stirring becomes mixed solution, again coal dust is joined in the mixed solution, stir.
4, lincomycin wet bacteria slag according to claim 1 cooperates the coal water slurry of system with coal, it is characterized in that, preparation lincomycin wet bacteria slag and quality of pc concentration are 70% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 70%, additive and water and be 30%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 95%, lincomycin wet bacteria slag 5%, additive is 2% of a coal water slurry weight, water is that 28% of coal water slurry weight is made, earlier with additive, water, lincomycin wet bacteria slag mixing and stirring becomes mixed solution, again coal dust is joined in the mixed solution, stir.
5, lincomycin wet bacteria slag according to claim 1 cooperates the coal water slurry of system with coal, it is characterized in that, preparation lincomycin wet bacteria slag and quality of pc concentration are 60% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 60%, additive and water and be 40%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 85%, lincomycin wet bacteria slag 15%, additive is 4% of a coal water slurry weight, water is that 36% of coal water slurry weight is made, earlier with additive, water, lincomycin wet bacteria slag mixing and stirring becomes mixed solution, again coal dust is joined in the mixed solution, stir.
6, lincomycin wet bacteria slag according to claim 1 cooperates the coal water slurry of system with coal, it is characterized in that, preparation lincomycin wet bacteria slag and quality of pc concentration are 55% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 55%, additive and water and be 45%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 80%, lincomycin wet bacteria slag 20%, additive is 5% of a coal water slurry weight, water is that 40% of coal water slurry weight is made, earlier with additive, water, lincomycin wet bacteria slag mixing and stirring becomes mixed solution, again coal dust is joined in the mixed solution, stir.
7, lincomycin wet bacteria slag according to claim 1 cooperates the coal water slurry of system with coal, it is characterized in that, preparation lincomycin wet bacteria slag and quality of pc concentration are 50% coal water slurry, by weight percent: coal dust and lincomycin wet bacteria slag and be 50%, additive and water and be 50%, wherein the weight percent of coal dust and lincomycin wet bacteria slag is: coal dust 70%, lincomycin wet bacteria slag 30%, additive is 5% of a coal water slurry weight, water is that 45% of coal water slurry weight is made, earlier with additive, water, lincomycin wet bacteria slag mixing and stirring becomes mixed solution, again coal dust is joined in the mixed solution, stir.
8, lincomycin wet bacteria slag according to claim 1 cooperates the coal water slurry of system with coal, it is characterized in that, the coal water slurry of 100 tons of weights of system, be to make for 35.5 tons by 56.7 tons in coal, 13.3 tons of lincomycin wet bacteria slags, 1.5 tons of additives, water, wherein, earlier additive, water, lincomycin wet bacteria slag mixing and stirring are become mixed solution, again coal dust is joined in the mixed solution, stir, the coal water slurry of 100 tons of weights.
9, lincomycin wet bacteria slag according to claim 1 cooperates the coal water slurry of system with coal, also can be applicable to gentamicin, Avrmectin, penicillin antibiotic bacterium dregs are handled application.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831329A (en) * | 2010-03-30 | 2010-09-15 | 安徽淮化股份有限公司 | High-stability coal water slurry and preparation method thereof |
| CN102732345A (en) * | 2012-07-10 | 2012-10-17 | 煤炭科学研究总院 | Sludge coal-water slurry and preparation method thereof |
| CN102796576A (en) * | 2012-09-12 | 2012-11-28 | 安徽理工大学 | Method for preparing coal water slurry by utilizing acrylonitrile waste water |
| CN103232869A (en) * | 2013-05-09 | 2013-08-07 | 陕西省石油化工研究设计院 | Water-coal-slurry additive for preparing slurry through concentrated water |
| CN104212505A (en) * | 2014-09-22 | 2014-12-17 | 西安文理学院 | Biomass water coal slurry prepared by utilizing feather |
| CN105368495A (en) * | 2015-11-25 | 2016-03-02 | 陕西省煤化工工程技术研究中心 | Method for preparing synthesis gas from organic dissolvant and biomass residue |
| CN107974315A (en) * | 2018-01-02 | 2018-05-01 | 浙江丰登化工股份有限公司 | It is a kind of to utilize the method that the dregs of a decoction and organic wastewater prepare new fuel slurry of fermenting |
| CN111974519A (en) * | 2020-07-27 | 2020-11-24 | 宜都长江机械设备有限公司 | Erythromycin mushroom residue crusher, erythromycin mushroom residue treatment system and mushroom residue treatment method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4696677A (en) * | 1986-04-11 | 1987-09-29 | Merck & Co., Inc. | Quaternary ammonium salts of anionic gums |
| CN100378208C (en) * | 2006-03-03 | 2008-04-02 | 中国科学院长春应用化学研究所 | a coal water slurry |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831329A (en) * | 2010-03-30 | 2010-09-15 | 安徽淮化股份有限公司 | High-stability coal water slurry and preparation method thereof |
| CN102732345A (en) * | 2012-07-10 | 2012-10-17 | 煤炭科学研究总院 | Sludge coal-water slurry and preparation method thereof |
| CN102732345B (en) * | 2012-07-10 | 2014-09-10 | 煤炭科学研究总院 | Sludge coal-water slurry and preparation method thereof |
| CN102796576A (en) * | 2012-09-12 | 2012-11-28 | 安徽理工大学 | Method for preparing coal water slurry by utilizing acrylonitrile waste water |
| CN103232869A (en) * | 2013-05-09 | 2013-08-07 | 陕西省石油化工研究设计院 | Water-coal-slurry additive for preparing slurry through concentrated water |
| CN104212505A (en) * | 2014-09-22 | 2014-12-17 | 西安文理学院 | Biomass water coal slurry prepared by utilizing feather |
| CN104212505B (en) * | 2014-09-22 | 2015-11-18 | 西安文理学院 | Utilize biomass coal-water slurry prepared by feather |
| CN105368495A (en) * | 2015-11-25 | 2016-03-02 | 陕西省煤化工工程技术研究中心 | Method for preparing synthesis gas from organic dissolvant and biomass residue |
| CN107974315A (en) * | 2018-01-02 | 2018-05-01 | 浙江丰登化工股份有限公司 | It is a kind of to utilize the method that the dregs of a decoction and organic wastewater prepare new fuel slurry of fermenting |
| CN111974519A (en) * | 2020-07-27 | 2020-11-24 | 宜都长江机械设备有限公司 | Erythromycin mushroom residue crusher, erythromycin mushroom residue treatment system and mushroom residue treatment method |
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Inventor after: Li Hanxu Inventor after: Wei Yajuan Inventor after: Mei Jingliang Inventor after: Zhang Xuecai Inventor after: Liu Shubao Inventor after: Wei Jijun Inventor after: Feng Jianbo Inventor after: Zhao Qing Inventor after: Zhang Ye Inventor after: Liu Yanmao Inventor after: Feng Yun Inventor before: Li Hanxu Inventor before: Zhang Xuecai Inventor before: Feng Jianbo Inventor before: Zhang Ye Inventor before: Liu Yanmao Inventor before: Feng Yun Inventor before: Wei Yajuan Inventor before: Mei Jingliang Inventor before: Zhao Qing |
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