CN107987914A - The sulfur method of coal - Google Patents
The sulfur method of coal Download PDFInfo
- Publication number
- CN107987914A CN107987914A CN201711128193.9A CN201711128193A CN107987914A CN 107987914 A CN107987914 A CN 107987914A CN 201711128193 A CN201711128193 A CN 201711128193A CN 107987914 A CN107987914 A CN 107987914A
- Authority
- CN
- China
- Prior art keywords
- coal
- fermentation tank
- pyrite
- thiobacillus ferrooxidans
- culture medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C10L9/00—Treating solid fuels to improve their combustion
-
- 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
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/26—Composting, fermenting or anaerobic digestion fuel components or materials from which fuels are prepared
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
The present invention provides a kind of sulfur method of coal.The sulfur method includes：Step S1, Thiobacillus ferrooxidans strain is inoculated in the fermentation tank containing culture medium, also containing the coal to be desulfurization mixed with culture medium in fermentation tank；Step S2, culture breeding Thiobacillus ferrooxidans strain, obtains the pyrite that surface is wrapped up by Thiobacillus ferrooxidans flora in fermentation tank；And step S3, the pyrite wrapped up by Thiobacillus ferrooxidans flora on surface is separated from coal, obtains desulfurization coal.By making Thiobacillus ferrooxidans strain breed culture in the fermentation tank containing coal and culture medium, obtain the pyrite that surface is wrapped up by Thiobacillus ferrooxidans flora, utilize the pyrite of parcel and the performance difference of coal, the efficient removal of pyrite can be achieved, the desulfurization of coal is finally realized with higher efficiency.The method of the present invention is remarkably improved desulfurization degree compared to existing method.
Description
Technical field
The present invention relates to coal removal of impurities field, in particular to a kind of sulfur method of coal.
Background technology
Sulfur content in coal is about 0.5%~3% according to the difference of coal, and wherein most is deposited in the form of inorganic sulfur
In pyrite.Coal chemical industry produces and can produce a large amount of sulfur dioxide (SO during coal burning2)。SO2Itself has poison
Property, can cause the nauseous disease of human respiratory；A large amount of SO2A wide range of acid rain can also be caused.The SO present according to China2Row
Put standard (1500mg/m3), the sulfur content of coal should be less than 0.7%.Therefore, it is to solve sulphur that sulfur content is reduced before coal utilization
The important channel of emission problem.
Existing sulfur method includes physics coal separation method, chemical desulfurization method, physics and chemical bond doctor treatment, microorganism and takes off
Sulphur method, these sulfur methods all there are it is respective the defects of, such as desulfurization degree is not high, desulphurization cost is high, complex procedures, desulfuration efficiency
It is low.
Therefore, it is still necessary to provide a kind of sulfur method of coal, desulfurization degree in art methods is not high to ask to solve
Topic.
The content of the invention
It is not high to solve desulfurization degree in art methods the object of the present invention is to provide a kind of sulfur method of coal
Problem.
To achieve these goals, the present invention provides a kind of sulfur method of coal, the sulfur method to include：Step
S1, Thiobacillus ferrooxidans strain is inoculated in the fermentation tank containing culture medium, is also contained in fermentation tank and is mixed with culture medium
Coal to be desulfurization；Step S2, culture breeding Thiobacillus ferrooxidans strain, obtains surface by ferrous oxide in fermentation tank
The pyrite of Thiobacillus flora parcel；And step S3, separate what surface was wrapped up by Thiobacillus ferrooxidans flora from coal
Pyrite, obtains desulfurization coal.
Further, separation is that the Huang wrapped up by Thiobacillus ferrooxidans flora on surface is separated from coal using floatation
Iron ore, obtains desulfurization coal.
Further, culture medium include mass-volume concentration be the ammonium sulfate of 4-8g/L, 0.08-0.12g/L potassium chloride,
The potassium hydrogen phosphate of 0.4-0.6g/L, the magnesium sulfate of 0.4-0.6g/L, the calcium nitrate of 0.01-0.03g/L and 7.5-9.5g/L
Ferrous sulfate.
Further, culture medium includes：Ammonium sulfate 6g/L, potassium chloride 0.1g/L, potassium hydrogen phosphate 0.5g/L, magnesium sulfate
0.5g/L, calcium nitrate 0.02g/L, ferrous sulfate 8.5g/L.
Further, step S1 includes：Coal and culture medium are placed in fermentation tank；To having been charged into coal and culture medium
Fermentation tank sterilizes；And Thiobacillus ferrooxidans strain is inoculated in sterilized fermentation tank.
Further, the concentration of the Thiobacillus ferrooxidans strain after inoculation in fermentation tank is 3000~10000/mL,
Preferably 7000/mL.
Further, in step S2, culture breeding is the culture breeding ferrous oxide sulphur under conditions of medium pH is 2-4
Bacillus species.
Further, cultivate in reproductive process, be additionally included in the step of being stirred in fermentation tank, the rotating speed preferably stirred
For 400-600r/min, more preferably 500r/min.
Further, the time for cultivating breeding is 10-20 days, is preferably 15 days.
Further, coal is coal dust, and preferably the particle diameter of coal dust is less than 0.2mm.
The method of the present invention is bred by making Thiobacillus ferrooxidans strain in the fermentation tank containing coal and culture medium
Culture, obtains the pyrite that surface is wrapped up by Thiobacillus ferrooxidans flora, utilizes the pyrite of parcel and the performance of coal
Difference finally realizes the desulfurization of coal, it can be achieved that the efficient removal of pyrite with higher efficiency.The present invention method compared to
Existing method can significantly improve desulfurization degree.
Embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
In order to realize efficient coal desulfurization, the present invention provides a kind of coal desulfurization method, which includes：Step
Rapid S1, Thiobacillus ferrooxidans strain is inoculated in the fermentation tank containing culture medium, is also contained and the training in the fermentation tank
Support the coal to be desulfurization of base mixing；Step S2, culture breeding Thiobacillus ferrooxidans strain, obtains surface in the fermentation tank
The pyrite wrapped up by Thiobacillus ferrooxidans flora；And step S3, surface is separated from the coal by ferrous oxide sulphur bar
The pyrite of bacterium flora parcel, obtains desulfurization coal.
The method of the present invention is bred by making Thiobacillus ferrooxidans strain in the fermentation tank containing coal and culture medium
Culture, obtains the pyrite that surface is wrapped up by Thiobacillus ferrooxidans flora, it is possible thereby to pyrite and coal using parcel
The surface property difference of charcoal, realizes pyrite from the efficient removal in coal.The method of the present invention is except with separative efficiency height
The advantages of outside, also with separating effect it is stable, take short, simple operation and other advantages.
The existing method by bacterial desulfurization is full utilization microorganism mostly to pyrite (FeS2) absorption generation
Thank to realize.Specifically, existing biological desulfurization method is the Absorption And Metabolism using microorganism, by oxidation reaction by Huang
The sulphur of iron ore is oxidized to SO4 2-Or elementary sulfur, and then these SO are separated from coal4 2-Or elementary sulfur.Therefore, in existing method
In, desulfurization degree be often depending on microorganism to pyrite erosion aoxidize go deep into degree.
And the present invention is unlike the prior art, although the present invention also utilizes microorganism, present invention firstly provides
In the presence of coal and culture medium, breeding culture is carried out to Thiobacillus ferrooxidans.The main idea of the present invention is：Using oxidation
Ferrous Thiobacillus cultivation, due to the particularity of pyrite component in coal, it includes Thiobacillus ferrooxidans to be metabolized required thing
Matter, therefore the obtained flora of breeding can adhere to and be wrapped in pyrite surface, thus change the surface property of pyrite, and then make
Pyrite is separated with coal, finally realizes the purpose of desulfurization.
During metabolic process i.e. of the prior art does not include flora breeding growth, therefore pyrite cannot be wrapped up only
Pyrite can be metabolized, be decomposed, and the process one side process of metabolic breakdown is slower, is on the other hand subject to Microflora
Therefore limitation causes desulfuration efficiency to be difficult to effectively improve；And the culture reproductive process of the application is due to the presence of culture medium,
Its Microflora increases comparatively fast, therefore the efficiency for wrapping up pyrite surface is higher, can ensure desulfuration efficiency increase.With it is existing
Bacterial desulfurization method is compared, and the present invention is more efficient, is more suitable for large-scale production.
In the coal desulfurization method of the present invention, the surface ferrous oxide sulphur bar can be separated from coal using floatation
The pyrite of bacterium flora parcel, obtains desulfurization coal.Since the Thiobacillus ferrooxidans flora of culture breeding has adhered to and wraps up
Pyrite surface in coal so that the hydrophilicity increase of pyrite, and then the hydrophilic of pyrite and coal can be passed through
Performance difference achievees the purpose that desulfurization by floatation.Floatation it is easy to operate, can more thoroughly be removed from coal
The pyrite of flora parcel, so as to fulfill efficient desulfurization effect.
In the coal desulfurization method of the present invention, the culture medium for being suitable for culture breeding Thiobacillus ferrooxidans is selected.Should
It is the ammonium sulfate of 4-8g/L, the potassium chloride of 0.08-0.12g/L, 0.4-0.6g/L that culture medium, which can include mass-volume concentration,
Potassium hydrogen phosphate, the magnesium sulfate of 0.4-0.6g/L, the ferrous sulfate of the calcium nitrate of 0.01-0.03g/L and 7.5-9.5g/L.The training
Base is supported in addition to mentioned component, further includes distilled water.
Preferably, which includes：Ammonium sulfate 6g/L, potassium chloride 0.1g/L, potassium hydrogen phosphate 0.5g/L, magnesium sulfate
0.5g/L, calcium nitrate 0.02g/L, ferrous sulfate 8.5g/L.
In the coal desulfurization method of the present invention, step S1 can include following operation：Coal and culture medium are placed in hair
In fermentation tank；Sterilize to the fermentation tank for having been charged into coal and culture medium；And by Thiobacillus ferrooxidans strain be inoculated in through
In the fermentation tank of sterilizing.Before Thiobacillus ferrooxidans is bred in culture, it usually needs sterilize to culture environment, to keep away
Exempt from other microorganisms to pollute culture environment and then influence desulfurization effect.
The concentration of Thiobacillus ferrooxidans strain after inoculation in fermentation tank is 3000~10000/mL, is preferably 7000
A/mL.The concentration value is the mixture system based on the culture medium in fermentation tank, coal and strain and is calculated.
Under the suitable concentration, it can be ensured that bred by the culture of certain time, the attachment of Thiobacillus ferrooxidans flora is wrapped in Huang
On the surface of iron ore, the inclusion enclave of pyrite is formed.The formation of these inclusion enclaves, facilitates and is more thoroughly removed from coal
Pyrite, and then realize the purpose of high-efficiency desulfurization.
In the coal desulfurization method of the present invention, in above-mentioned steps S2, the culture of Thiobacillus ferrooxidans breeding be
PH value carries out under conditions of being 2-4.Thiobacillus ferrooxidans has acidophilus characteristic, suitable for being grown in sour environment.Therefore,
The pH value of cultivating system should be adjusted to acidic value, such as pH value is between 2-4, preferable ph 3.
In order to make Thiobacillus ferrooxidans be come into full contact with pyrite, in reproductive process is cultivated, fermentation tank is additionally included in
In the step of being stirred.If mixing speed is excessively slow, it possibly can not ensure filling for Thiobacillus ferrooxidans thalline and pyrite
Point, uniformly in contact with；But if mixing speed is too fast, the formation of pyrite inclusion enclave may be influenced whether again.It is of the invention preferred
It is 400-600r/min by the rotational speed regulation of stirring, is more preferably adjusted to 500r/min.
The time for cultivating breeding should be set as untill the inclusion enclave of pyrite is formed.But for example, the culture is numerous
The time grown is set as 10-20 days, is preferably 15 days.
In order to preferably remove pyrite from coal, the coal in the method for the present invention is preferably coal dust, and preferably should
The particle diameter of coal dust is less than 0.2mm.
Further illustrate the beneficial effect of the application below in conjunction with specific embodiments.
Embodiment 1：
The method according to the invention, biological desulphurization is carried out according to following steps to coal：
(1) coal dust that 2kg particle diameters are less than 0.2mm is loaded in 50L fermentation tanks；
(2) culture medium through high-temperature sterilization is poured into fermentation tank by sterile working, loads distilled water to fermentation tank 20L
Locate, the addition concentration of each nutrition composition is in culture medium：Ammonium sulfate 6g/L, potassium chloride 0.1g/L, potassium hydrogen phosphate 0.5g/L, sulfuric acid
Magnesium 0.5g/L, calcium nitrate 0.02g/L, ferrous sulfate 8.5g/L；
(3) high-temperature sterilization 30min is carried out to the fermentation tank for having been charged into coal dust and culture medium；
(4) the cultured Thiobacillus ferrooxidans strains of 500mL are accessed into fermentation tank, Thiobacillus ferrooxidans strain exists
Concentration in fermentation tank is 7000/mL.
(5) start fermentation tank, the rotating speed of blender in fermentation tank is adjusted to 500r/min, pH is adjusted to 3, starts to cultivate.
(6) since Thiobacillus ferrooxidans can absorb and be metabolized ferrous ion and element sulphur, after cultivating 15 days, oxidation is sub-
Iron Thiobacillus thalline has adhered to the pyrite surface being wrapped in coal dust, makes the hydrophilicity of pyrite increase.Utilize pyrite
It is different from the hydrophilicity of coal dust, flotation is carried out to coal dust, obtains the coal for being stripped of pyrite.
Embodiment 2
Biological desulphurization is carried out to coal according to following steps：
(1) coal dust that 2kg particle diameters are less than 0.2mm is loaded in 50L fermentation tanks；
(2) culture medium through high-temperature sterilization is poured into fermentation tank by sterile working, loads distilled water to fermentation tank 20L
Locate, the addition concentration of each nutrition composition is in culture medium：Ammonium sulfate 6g/L, potassium chloride 0.1g/L, potassium hydrogen phosphate 0.5g/L, sulfuric acid
Magnesium 0.5g/L, calcium nitrate 0.02g/L, ferrous sulfate 8.5g/L；
(3) high-temperature sterilization 30min is carried out to the fermentation tank for having been charged into coal dust and culture medium；
(4) the cultured Thiobacillus ferrooxidans strains of 500mL are accessed into fermentation tank, Thiobacillus ferrooxidans strain exists
Concentration in fermentation tank is 7500/mL.
(5) start fermentation tank, the rotating speed of blender in fermentation tank is adjusted to 400r/min, pH is adjusted to 3, starts to cultivate.
(6) since Thiobacillus ferrooxidans can absorb and be metabolized ferrous ion and element sulphur, after cultivating 15 days, oxidation is sub-
Iron Thiobacillus thalline has adhered to the pyrite surface being wrapped in coal dust, makes the hydrophilicity of pyrite increase.Utilize pyrite
It is different from the hydrophilicity of coal dust, flotation is carried out to coal dust, obtains the coal for being stripped of pyrite.
Embodiment 3
Biological desulphurization is carried out to coal according to following steps：
(1) coal dust that 2kg particle diameters are less than 0.2mm is loaded in 50L fermentation tanks；
(2) culture medium through high-temperature sterilization is poured into fermentation tank by sterile working, loads distilled water to fermentation tank 20L
Locate, the addition concentration of each nutrition composition is in culture medium：Ammonium sulfate 6g/L, potassium chloride 0.1g/L, potassium hydrogen phosphate 0.5g/L, sulfuric acid
Magnesium 0.5g/L, calcium nitrate 0.02g/L, ferrous sulfate 8.5g/L；
(3) high-temperature sterilization 30min is carried out to the fermentation tank for having been charged into coal dust and culture medium；
(4) the cultured Thiobacillus ferrooxidans strains of 500mL are accessed into fermentation tank, Thiobacillus ferrooxidans strain exists
Concentration in fermentation tank is 7500/mL.
(5) start fermentation tank, the rotating speed of blender in fermentation tank is adjusted to 600r/min, pH is adjusted to 3, starts to cultivate.
(6) since Thiobacillus ferrooxidans can absorb and be metabolized ferrous ion and element sulphur, after cultivating 15 days, oxidation is sub-
Iron Thiobacillus thalline has adhered to the pyrite surface being wrapped in coal dust, makes the hydrophilicity of pyrite increase.Utilize pyrite
It is different from the hydrophilicity of coal dust, flotation is carried out to coal dust, obtains the coal for being stripped of pyrite.
Embodiment 4
Biological desulphurization is carried out to coal according to following steps：
(1) coal dust that 2kg particle diameters are less than 0.2mm is loaded in 50L fermentation tanks；
(2) culture medium through high-temperature sterilization is poured into fermentation tank by sterile working, loads distilled water to fermentation tank 20L
Locate, the addition concentration of each nutrition composition is in culture medium：Ammonium sulfate 6g/L, potassium chloride 0.1g/L, potassium hydrogen phosphate 0.5g/L, sulfuric acid
Magnesium 0.5g/L, calcium nitrate 0.02g/L, ferrous sulfate 8.5g/L；
(3) high-temperature sterilization 30min is carried out to the fermentation tank for having been charged into coal dust and culture medium；
(4) the cultured Thiobacillus ferrooxidans strains of 500mL are accessed into fermentation tank, Thiobacillus ferrooxidans strain exists
Concentration in fermentation tank is 8000/mL.
(5) start fermentation tank, the rotating speed of blender in fermentation tank is adjusted to 500r/min, pH is adjusted to 2, starts to cultivate.
(6) since Thiobacillus ferrooxidans can absorb and be metabolized ferrous ion and element sulphur, after cultivating 15 days, oxidation is sub-
Iron Thiobacillus thalline has adhered to the pyrite surface being wrapped in coal dust, makes the hydrophilicity of pyrite increase.Utilize pyrite
It is different from the hydrophilicity of coal dust, flotation is carried out to coal dust, obtains the coal for being stripped of pyrite.
Embodiment 5
Biological desulphurization is carried out to coal according to following steps：
(1) coal dust that 2kg particle diameters are less than 0.2mm is loaded in 50L fermentation tanks；
(2) culture medium through high-temperature sterilization is poured into fermentation tank by sterile working, loads distilled water to fermentation tank 20L
Locate, the addition concentration of each nutrition composition is in culture medium：Ammonium sulfate 6g/L, potassium chloride 0.1g/L, potassium hydrogen phosphate 0.5g/L, sulfuric acid
Magnesium 0.5g/L, calcium nitrate 0.02g/L, ferrous sulfate 8.5g/L；
(3) high-temperature sterilization 30min is carried out to the fermentation tank for having been charged into coal dust and culture medium；
(4) the cultured Thiobacillus ferrooxidans strains of 500mL are accessed into fermentation tank, Thiobacillus ferrooxidans strain exists
Concentration in fermentation tank is 7000/mL.
(5) start fermentation tank, the rotating speed of blender in fermentation tank is adjusted to 500r/min, pH is adjusted to 4, starts to cultivate.
(6) since Thiobacillus ferrooxidans can absorb and be metabolized ferrous ion and element sulphur, after cultivating 15 days, oxidation is sub-
Iron Thiobacillus thalline has adhered to the pyrite surface being wrapped in coal dust, makes the hydrophilicity of pyrite increase.Utilize pyrite
It is different from the hydrophilicity of coal dust, flotation is carried out to coal dust, obtains the coal for being stripped of pyrite.
Embodiment 6
Biological desulphurization is carried out to coal according to following steps：
(1) coal dust that 2kg particle diameters are less than 0.2mm is loaded in 50L fermentation tanks；
(2) culture medium through high-temperature sterilization is poured into fermentation tank by sterile working, loads distilled water to fermentation tank 20L
Locate, the addition concentration of each nutrition composition is in culture medium：Ammonium sulfate 6g/L, potassium chloride 0.1g/L, potassium hydrogen phosphate 0.5g/L, sulfuric acid
Magnesium 0.5g/L, calcium nitrate 0.02g/L, ferrous sulfate 8.5g/L；
(3) high-temperature sterilization 30min is carried out to the fermentation tank for having been charged into coal dust and culture medium；
(4) the cultured Thiobacillus ferrooxidans strains of 500mL are accessed into fermentation tank, Thiobacillus ferrooxidans strain exists
Concentration in fermentation tank is 6000/mL.
(5) start fermentation tank, the rotating speed of blender in fermentation tank is adjusted to 500r/min, pH is adjusted to 3, starts to cultivate.
(6) since Thiobacillus ferrooxidans can absorb and be metabolized ferrous ion and element sulphur, after cultivating 10 days, oxidation is sub-
Iron Thiobacillus thalline has adhered to the pyrite surface being wrapped in coal dust, makes the hydrophilicity of pyrite increase.Utilize pyrite
It is different from the hydrophilicity of coal dust, flotation is carried out to coal dust, obtains the coal for being stripped of pyrite.
Embodiment 7
Biological desulphurization is carried out to coal according to following steps：
(1) coal dust that 2kg particle diameters are less than 0.2mm is loaded in 50L fermentation tanks；
(2) culture medium through high-temperature sterilization is poured into fermentation tank by sterile working, loads distilled water to fermentation tank 20L
Locate, the addition concentration of each nutrition composition is in culture medium：Ammonium sulfate 6g/L, potassium chloride 0.1g/L, potassium hydrogen phosphate 0.5g/L, sulfuric acid
Magnesium 0.5g/L, calcium nitrate 0.02g/L, ferrous sulfate 8.5g/L；
(3) high-temperature sterilization 30min is carried out to the fermentation tank for having been charged into coal dust and culture medium；
(4) the cultured Thiobacillus ferrooxidans strains of 500mL are accessed into fermentation tank, Thiobacillus ferrooxidans strain exists
Concentration in fermentation tank is 5000/mL.
(5) start fermentation tank, the rotating speed of blender in fermentation tank is adjusted to 500r/min, pH is adjusted to 3, starts to cultivate.
(6) since Thiobacillus ferrooxidans can absorb and be metabolized ferrous ion and element sulphur, after cultivating 20 days, oxidation is sub-
Iron Thiobacillus thalline has adhered to the pyrite surface being wrapped in coal dust, makes the hydrophilicity of pyrite increase.Utilize pyrite
It is different from the hydrophilicity of coal dust, flotation is carried out to coal dust, obtains the coal for being stripped of pyrite.
Embodiment 8
The method according to the invention, the biological desulphurization of coal is carried out the step of with similar to embodiment 1, is different only in that：
Concentration of the Thiobacillus ferrooxidans strain in fermentation tank is 3000/mL.
Embodiment 9
The method according to the invention, the biological desulphurization of coal is carried out the step of with similar to embodiment 1, is different only in that：
Concentration of the Thiobacillus ferrooxidans strain in fermentation tank is 10000/mL.
Embodiment 10
Biological desulphurization is carried out to coal according to following steps：
(1) coal dust that 2kg particle diameters are less than 0.2mm is loaded in 50L fermentation tanks；
(2) culture medium through high-temperature sterilization is poured into fermentation tank by sterile working, loads distilled water to fermentation tank 20L
Locate, the addition concentration of each nutrition composition is in culture medium：Ammonium sulfate 4g/L, potassium chloride 0.08g/L, potassium hydrogen phosphate 0.4g/L, sulphur
Sour magnesium 0.4g/L, calcium nitrate 0.01g/L, ferrous sulfate 7.5g/L.
(3) high-temperature sterilization 30min is carried out to the fermentation tank for having been charged into coal dust and culture medium；
(4) the cultured Thiobacillus ferrooxidans strains of 500mL are accessed into fermentation tank, Thiobacillus ferrooxidans strain exists
Concentration in fermentation tank is 7000/mL.
(5) start fermentation tank, the rotating speed of blender in fermentation tank is adjusted to 500r/min, pH is adjusted to 3, starts to cultivate.
(6) since Thiobacillus ferrooxidans can absorb and be metabolized ferrous ion and element sulphur, after cultivating 15 days, oxidation is sub-
Iron Thiobacillus thalline has adhered to the pyrite surface being wrapped in coal dust, makes the hydrophilicity of pyrite increase.Utilize pyrite
It is different from the hydrophilicity of coal dust, flotation is carried out to coal dust, obtains the coal for being stripped of pyrite.
Embodiment 11
Biological desulphurization is carried out to coal according to following steps：
(1) coal dust that 2kg particle diameters are less than 0.2mm is loaded in 50L fermentation tanks；
(2) culture medium through high-temperature sterilization is poured into fermentation tank by sterile working, loads distilled water to fermentation tank 20L
Locate, the addition concentration of each nutrition composition is in culture medium：Ammonium sulfate 8g/L, potassium chloride 0.12g/L, potassium hydrogen phosphate 0.6g/L, sulphur
Sour magnesium 0.6g/L, calcium nitrate 0.03g/L, ferrous sulfate 9.5g/L.
(3) high-temperature sterilization 30min is carried out to the fermentation tank for having been charged into coal dust and culture medium；
(4) the cultured Thiobacillus ferrooxidans strains of 500mL are accessed into fermentation tank, Thiobacillus ferrooxidans strain exists
Concentration in fermentation tank is 7000/mL.
(5) start fermentation tank, the rotating speed of blender in fermentation tank is adjusted to 500r/min, pH is adjusted to 3, starts to cultivate.
(6) since Thiobacillus ferrooxidans can absorb and be metabolized ferrous ion and element sulphur, after cultivating 15 days, oxidation is sub-
Iron Thiobacillus thalline has adhered to the pyrite surface being wrapped in coal dust, makes the hydrophilicity of pyrite increase.Utilize pyrite
It is different from the hydrophilicity of coal dust, flotation is carried out to coal dust, obtains the coal for being stripped of pyrite.
Comparative example 1
According to other methods of the prior art, biological desulphurization is carried out to coal according to following steps：
(1) coal dust that 2kg particle diameters are less than 0.2mm is loaded in 50L reaction kettles；
(2) load distilled water and locate to fermentation tank 20L, with concentration addition Thiobacillus ferrooxidans same as Example 1；
(3) coal dust and thalline are mixed, when reaction 10 is small at room temperature；
(4) at a temperature of 30-35 DEG C, when stirring reaction 2-5 is small.
(5) coal in reaction kettle is washed in stirring, is dried after filtering and obtain desulfurized coal.
Comparative example 2
The step of with similar to comparative example 1, carries out the biological desulphurization of coal, is different only in that, Thiobacillus ferrooxidans is anti-
It is 26000/mL to answer the concentration in kettle, far above concentration of the Thiobacillus ferrooxidans strain in fermentation tank in embodiment 1.
Coal sample in embodiment 1-11 and comparative example 1-2 Jing Guo desulfurization process is detected, wherein, coal desulfurization
The measuring method of rate is：According to national standard GB/T 214-2007《The assay method of full content of Sulphur in coal》The sulfur content of measure before and after the processing,
The percentage that the front and rear difference for detecting sulfur content twice accounts for before processing sulfur content is desulfurization degree.Measurement result is shown in table 1 below
Go out.
Table 1
As can be seen from the above embodiments, Thiobacillus ferrooxidans is directly placed in the reaction containing coal dust with the prior art
Oxidation reaction is carried out in kettle, using thalline to compare so as to fulfill the method for desulfurization, method of the invention substantially increases coal
Desulfurization degree.
Specifically, the method for comparative example 1-2 does not introduce culture medium in a kettle, just with ferrous oxide sulphur bar
The Absorption And Metabolism reaction of bacterium, element sulphur or SO are oxidized to by the sulphur in pyrite4 2-, by washing get rid of above-mentioned element sulphur or
SO4 2-, so as to fulfill the purpose of desulfurization.Method of this method compared to the present invention, it is impossible to thoroughly remove the sulphur contained in pyrite
Element.Even if according to the method for comparative example 2, in the case where Thiobacillus ferrooxidans strain concentration is far above embodiment 1-11,
Its removal efficiency still is below the removal efficiency of the present invention.
The method according to the invention, in the presence of culture medium, the culture breeding Thiobacillus ferrooxidans in coal.Its
In, since Thiobacillus ferrooxidans can absorb and be metabolized ferrous ion and element sulphur, thus the Thiobacillus ferrooxidans added
Strain can be attached to around pyrite, and with the extension of incubation time, the strain of attachment can breed Thiobacillus ferrooxidans
Flora, these floras are wrapped in the surface of pyrite, form the bacterium inclusion enclave of pyrite.Utilize the parent of the inclusion enclave of pyrite
Water-based energy, can be such that it is separated with coal dust.Since inorganic sulfur is largely present in pyrite, thus utilize the parent of inclusion enclave
It is water-based pyrite more thoroughly to be removed from coal, make the present invention with the sulphur member in higher efficiency removing coal
Element.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of sulfur method of coal, it is characterised in that the sulfur method includes：
Step S1, Thiobacillus ferrooxidans strain is inoculated in the fermentation tank containing culture medium, is also contained in the fermentation tank
The coal to be desulfurization mixed with the culture medium；
Step S2, the culture breeding Thiobacillus ferrooxidans strain, obtains surface by ferrous oxide sulphur in the fermentation tank
The pyrite of bacillus flora parcel；And
Step S3, the pyrite wrapped up by the Thiobacillus ferrooxidans flora on surface is separated from the coal, is obtained
Desulfurization coal.
2. sulfur method according to claim 1, it is characterised in that the separation is to utilize floatation from the coal
The pyrite that separation surface is wrapped up by the Thiobacillus ferrooxidans flora, obtains desulfurization coal.
3. sulfur method according to claim 1 or 2, it is characterised in that the culture medium is including mass-volume concentration
The ammonium sulfate of 4-8g/L, the potassium chloride of 0.08-0.12g/L, the potassium hydrogen phosphate of 0.4-0.6g/L, 0.4-0.6g/L magnesium sulfate,
The calcium nitrate of 0.01-0.03g/L and the ferrous sulfate of 7.5-9.5g/L.
4. sulfur method according to claim 3, it is characterised in that the culture medium includes：Ammonium sulfate 6g/L, potassium chloride
0.1g/L, potassium hydrogen phosphate 0.5g/L, magnesium sulfate 0.5g/L, calcium nitrate 0.02g/L, ferrous sulfate 8.5g/L.
5. sulfur method according to any one of claim 1 to 4, it is characterised in that the step S1 includes：
The coal and the culture medium are placed in the fermentation tank；
Sterilize to the fermentation tank for having been charged into the coal and the culture medium；And
The Thiobacillus ferrooxidans strain is inoculated in the sterilized culture medium.
6. sulfur method according to claim 5, it is characterised in that the ferrous oxide after inoculation in the fermentation tank
The concentration of Thiobacillus strain is 3000~10000/mL, is preferably 7000/mL.
7. method according to claim 1 or 2, it is characterised in that in the step S2, the culture breeding is to cultivate
The Thiobacillus ferrooxidans strain is bred in culture under conditions of base pH value is 2-4.
8. method according to claim 1 or 2, it is characterised in that in the culture reproductive process, be additionally included in the hair
The step of being stirred in fermentation tank, the rotating speed of preferably described stirring is 400-600r/min, more preferably 500r/min.
9. method according to claim 1 or 2, it is characterised in that the time of the culture breeding is 10-20 days, preferably
For 15 days.
10. method according to claim 1 or 2, it is characterised in that the coal is coal dust, the grain of preferably described coal dust
Footpath is less than 0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711128193.9A CN107987914A (en) | 2017-11-14 | 2017-11-14 | The sulfur method of coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711128193.9A CN107987914A (en) | 2017-11-14 | 2017-11-14 | The sulfur method of coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107987914A true CN107987914A (en) | 2018-05-04 |
Family
ID=62030951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711128193.9A Pending CN107987914A (en) | 2017-11-14 | 2017-11-14 | The sulfur method of coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107987914A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4775627A (en) * | 1986-04-22 | 1988-10-04 | The Ohio State University, A Branch Of The State Government | Coal desulfurization using bacteria adaptation and bacterial modification of pyrite surfaces |
| CN1924042A (en) * | 2006-10-13 | 2007-03-07 | 中国铝业股份有限公司 | Method of bacterial eliminating sulfur in high sulfur bauxite |
| CN101607226A (en) * | 2009-07-15 | 2009-12-23 | 北京科技大学 | A kind of technology of utilizing sulphur in Biological Pretreatment and the flotation removing coal slime |
| KR101369338B1 (en) * | 2013-09-10 | 2014-03-06 | 한국지질자원연구원 | Depyritization of coal using microorganism |
| CN105542898A (en) * | 2015-12-15 | 2016-05-04 | 辽宁工程技术大学 | Desulphurization method of coal dust via biological oxidation |
| CN107033983A (en) * | 2017-03-06 | 2017-08-11 | 西安科技大学 | Compound desulphurization system and method before a kind of coal combustion |
-
2017
- 2017-11-14 CN CN201711128193.9A patent/CN107987914A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4775627A (en) * | 1986-04-22 | 1988-10-04 | The Ohio State University, A Branch Of The State Government | Coal desulfurization using bacteria adaptation and bacterial modification of pyrite surfaces |
| CN1924042A (en) * | 2006-10-13 | 2007-03-07 | 中国铝业股份有限公司 | Method of bacterial eliminating sulfur in high sulfur bauxite |
| CN101607226A (en) * | 2009-07-15 | 2009-12-23 | 北京科技大学 | A kind of technology of utilizing sulphur in Biological Pretreatment and the flotation removing coal slime |
| KR101369338B1 (en) * | 2013-09-10 | 2014-03-06 | 한국지질자원연구원 | Depyritization of coal using microorganism |
| CN105542898A (en) * | 2015-12-15 | 2016-05-04 | 辽宁工程技术大学 | Desulphurization method of coal dust via biological oxidation |
| CN107033983A (en) * | 2017-03-06 | 2017-08-11 | 西安科技大学 | Compound desulphurization system and method before a kind of coal combustion |
Non-Patent Citations (2)
| Title |
|---|
| 张东晨: "《微生物脱除煤炭中的黄铁矿硫》", 31 July 2005, 合肥工业大学出版社 * |
| 王永莲等: "《地浸采铀工艺技术》", 31 March 2007, 国防科技大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105712490B (en) | A kind of method of mixotroph nutrition conversion processing high ammonia-nitrogen wastewater | |
| CN107555607B (en) | Biological composite oxygen increasing agent and preparation method thereof | |
| CN109321482A (en) | A kind of environmental protection complex micro organism fungicide solid particulate product and preparation method thereof | |
| CN109455828A (en) | A kind of application method of immobilized microorganism in livestock breeding wastewater processing | |
| CN105441345B (en) | One plant of Candida tropicalis and its application in biological desulphurization | |
| CN111088200B (en) | Heterotrophic nitrification aerobic denitrifying bacterium and application thereof in pig-raising wastewater treatment | |
| CN101050422B (en) | Method for biologic breeding anaerobic microbe without need of accessorial incubator | |
| CN115838656A (en) | Bacillus belgii strain and application thereof | |
| EP0082814B1 (en) | Microorganisms of the genus pseudomonas and method for the decomposition of compounds containing methyl groups in aqueous solutions | |
| CN115786163B (en) | Bacillus licheniformis SCAU1602 and application thereof | |
| CN110982717B (en) | Honey yeast and method for producing single-cell protein by treating high-ammonia-nitrogen biogas slurry with same | |
| CN106635210B (en) | Method for removing hydrogen sulfide in biogas by using Acidithiobacillus caldus | |
| CN112251357A (en) | Method for screening livestock and poultry manure fermentation microbial inoculum | |
| CN107987914A (en) | The sulfur method of coal | |
| CN103933855B (en) | SO in bioanalysis removing flue gas2and NOxdouble-column in series device and method | |
| CN114774296B (en) | Pichia pastoris strain HGC34 resistant to high Wen Jiye and application thereof in deodorization and degradation of livestock manure | |
| CN113980845B (en) | Coicoccocus roseus for biological deodorization and application thereof | |
| KR20170082021A (en) | Soil Microorganism Preparations and Fertilizer Comprizing the Preparations and Muck | |
| CN112626000B (en) | Bacterial strain capable of effectively removing ammonia gas and hydrogen sulfide and screening method thereof | |
| JPH0559079B2 (en) | ||
| CN110228855B (en) | Preparation method of graphene oxide composite material and sewage treatment method | |
| CN107937299B (en) | Thermophilic Pb mineralization bacteria and method for passivating Pb in sludge high-temperature compost by using same | |
| CN110980967A (en) | Microbial composite water purifying agent and preparation method thereof | |
| CN106085923B (en) | A kind of preparation method and application of bacillus amyloliquefaciens and its biological flocculant | |
| JP2008018413A (en) | Method for ammonia-deodorizing, novel chlorellavulgaris having ammonia-deodorizing capacity, biomass including this novel chlorellavulgaris having ammonia-deodorizing capacity, and feed additive including this biomass |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180504 |
|
| RJ01 | Rejection of invention patent application after publication |