CN112592748A - Device for removing sulfur in coal by microorganisms - Google Patents
Device for removing sulfur in coal by microorganisms Download PDFInfo
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- CN112592748A CN112592748A CN202011339318.4A CN202011339318A CN112592748A CN 112592748 A CN112592748 A CN 112592748A CN 202011339318 A CN202011339318 A CN 202011339318A CN 112592748 A CN112592748 A CN 112592748A
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- 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
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- 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
- C10L2290/44—Deacidification step, e.g. in coal enhancing
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- 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
- C10L2290/56—Specific details of the apparatus for preparation or upgrading of a fuel
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Abstract
The invention discloses a device for removing sulfur in coal by microorganisms, which comprises a hanging seat, a coal loading and unloading device hung below the hanging seat through a hanger, and a bacterial liquid and a coal reaction tank for soaking the coal loading and unloading device; a bacteria liquid storage box is arranged on one side of the bacteria liquid and coal reaction tank and used for providing bacteria liquid to the bacteria liquid and coal reaction tank so that the bacteria liquid reacts with coal in the coal loading and unloading device to complete desulfurization; and a water storage tank is further arranged on one side of the bacteria liquid and coal reaction tank and used for providing clean water for the bacteria liquid and coal reaction tank to clean coal in the coal loading and unloading device. The device for removing sulfur in coal by microorganisms can be used for practically removing sulfur by microorganisms, realizes large-scale coal desulfurization, is simple and convenient to operate, and effectively reduces the risk of spontaneous combustion of a coal storage pile.
Description
Technical Field
The invention belongs to the technical field of desulfurization devices, and particularly relates to a device for removing sulfur in coal by microorganisms.
Background
China is the first coal producing big country in the world and is also the first coal producing big country in the worldThe coal consumption is great. However, as mining progresses, resources of high-quality low-sulfur coal are gradually exhausted, and the quality of coal is continuously reduced. The combustion of high-sulfur coal can directly release SO2. The sulfur dioxide is released into the air and is further oxidized to form sulfuric acid type acid rain or acid mist along with precipitation. Leading to the continuous deterioration of the environment in China in recent years. Along with the increase of national demand for coal, the coal mining amount is also improved, but along with the continuous mining, the high-quality low-sulfur coal resource is gradually exhausted, and the quality of coal is continuously reduced. Only high-sulfur coal can be mined, but the high-sulfur coal has great harm to the environment in stacking, transportation and combustion; the sulfur content is a main internal factor causing spontaneous combustion of coal in the stacking and transportation processes, and the higher the sulfur content in the coal is, the more spontaneous combustion is easy to occur.
According to statistics, 50% of coal mines in China have natural fire risks, and the case that fire occurs in the storage and transportation processes of coal is rare. The main internal factors of the spontaneous combustion of the coal storage pile are the sulfur content in the coal and the external factors include oxygen, temperature and the like. When the sulfur content in the coal exceeds 20%, the spontaneous combustion possibility of the coal is extremely high; the coal storage pile is formed by stacking coal, the temperature in the coal pile can rise, and when the heat dissipation condition is poor, the self-heating phenomenon is easy to occur. The traditional fire prevention and extinguishing method mainly starts from two aspects of oxygen prevention and rapid heat dissipation, but an effective technical means is not available for the factor of sulfur content of ore, so that the fire prevention and extinguishing method is not ideal for the treatment effect of fire caused by coal with over-high sulfur content.
Coal desulfurization methods can be classified into physical methods, chemical methods, and microbial methods. The principle of the physical method is to separate coal and sulfur-containing substances by utilizing the difference of physical properties such as density, magnetism, hydrophilicity and hydrophobicity and the like, and the method comprises gravity separation, magnetic separation, flotation and the like. The physical method has the advantages that: the treatment method is simple and the treatment capacity is large; the disadvantages are that the operation of crushing, grinding, stirring and the like is needed in the process, so that the energy consumption is high, organic sulfur embedded in coal macromolecules cannot be removed, and the dispersed inorganic sulfur is difficult to treat. The principle of the chemical method is to change the sulfur in the coal into different forms by chemical reaction so as to be easy to separate, and the method comprises alkaline desulfurization, solvent extraction desulfurization, an electrochemical method and the like. The chemical method has the advantages of good desulfurization effect and capability of treating organic sulfur; the method has the disadvantages of strong acid, strong alkali, high temperature and high pressure in the process, further causing the loss of the heat value of the coal, high energy consumption and larger pollution risk.
In recent years, more and more students use a microbial method to desulfurize coal, and the principle of the microbial desulfurization method is to degrade sulfur-containing substances in coal into harmless sulfate or soluble sulfide by using microbes, and finally dissolve the sulfate or soluble sulfide in water to realize desulfurization, such as oxidation of sulfide minerals and breakage of sulfur-containing carbocycle. The technology takes the microbiological metallurgy technology as a process template, and the process is mature and has high feasibility. The technology for coal desulfurization by microorganisms has the advantages of cleanness, environmental protection, low process cost, simple flow, low energy consumption, mild reaction conditions and the like, and more importantly, has the potential of removing organic sulfur and dispersive pyrite sulfur in coal on the premise of not reducing the calorific value of the coal. Because the advantages of microbial desulfurization make it become the research focus and development trend in the field of coal desulfurization, but the prior art lacks better special equipment, so that the prior coal desulfurization process is relatively complex and difficult to implement.
In addition, the prior art is very few in devices for coal microbial desulfurization, and devices such as a desulfurizing tower and the like are commonly used in the industry at present. The desulfurization tower is SO2Absorption purification's main body equipment, main operation mode is that continuous acid mist waste gas is introduced the purifying column by the tuber pipe, and through the packing layer, waste gas carries out the gas-liquid two-phase abundant contact absorption neutralization reaction with sodium hydroxide absorption liquid, and acid mist waste gas is through purifying the back, is discharged into the atmosphere by the fan after defogging board dehydration defogging again. The absorption liquid is sprayed down at the tower top after being pressurized by a water pump at the tower bottom, and finally flows back to the tower bottom for recycling. The purified acid mist waste gas meets the emission requirement of local emission standard and is lower than the national emission standard. The desulfurizing tower mainly absorbs sulfur dioxide in the air, and no method is available for removing sulfur in the coal; the device mainly utilizes acid-base neutralization reaction, and the use of chemical products can cause dangers such as high energy consumption and environmental pollution.
Disclosure of Invention
Based on the defects in the prior art, the technical problem to be solved by the invention is to provide the device for removing sulfur in coal by microorganisms, which can be used for practically desulfurizing the microorganisms, realizing large-scale coal desulfurization, has the advantages of simple device and convenient operation, and effectively reduces the risk of spontaneous combustion of a coal storage pile.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides a device for removing sulfur in coal by microorganisms, which comprises a hanging seat, a coal loading and unloading device hung below the hanging seat through a hanger, and a bacterial liquid and a coal reaction tank for soaking the coal loading and unloading device; a bacteria liquid storage box is arranged on one side of the bacteria liquid and coal reaction tank and used for providing bacteria liquid to the bacteria liquid and coal reaction tank so that the bacteria liquid reacts with coal in the coal loading and unloading device to complete desulfurization; and a water storage tank is further arranged on one side of the bacteria liquid and coal reaction tank and used for providing clean water for the bacteria liquid and coal reaction tank to clean coal in the coal loading and unloading device.
Preferably, the other side of the bacterial liquid and coal reaction tank is provided with a pumped bacterial liquid storage tank for storing bacterial liquid and bacterial liquid after reaction in the coal reaction tank; and a pumped water storage tank is arranged on the other side of the bacterial liquid and coal reaction tank and is used for storing water after being soaked in the bacterial liquid and coal reaction tank for a period of time.
Optionally, a bacteria liquid injection pump is arranged in the bacteria liquid storage tank, an outlet of the bacteria liquid injection pump is communicated with the bacteria liquid and coal reaction tank through a bacteria liquid injection pipeline, and a bacteria liquid injection switch is mounted on the bacteria liquid injection pipeline; the water storage tank is internally provided with a water injection pump, the outlet of the water injection pump is communicated with the bacteria liquid and coal reaction tank through a water injection pipeline, and the water injection pipeline is provided with a water injection switch.
Further, a bacteria extracting liquid pump is arranged in the bacteria extracting liquid storage box, an inlet of the bacteria extracting liquid pump is communicated with the bacteria liquid and coal reaction tank through a bacteria extracting liquid pipeline, and a bacteria extracting liquid switch is mounted on the bacteria extracting liquid pipeline; be equipped with the suction pump in the pump-out water storage box, the entry of this suction pump through draw water the pipeline with fungus liquid and coal reaction tank intercommunication, install the switch that draws water on the pipeline that draws water.
Optionally, a heating insulation layer is arranged on the wall surface of the bacteria liquid and coal reaction tank and used for increasing the temperature of the bacteria liquid and the bacteria liquid in the coal reaction tank.
Optionally, the coal loading and unloading device is of a square structure, and a plurality of screen meshes are formed on the four peripheral surfaces of the coal loading and unloading device; and iron rings are arranged at four corners of the top of the coal loading and unloading device.
Furthermore, the lifting appliance consists of a fixed pulley, a rope and a hook, and the hook sleeves the iron ring through an iron chain or a thick rope and lifts the coal loading and unloading device.
Therefore, the device for removing sulfur in coal by microorganisms can be used for the practical microbial desulfurization method commonly used in laboratories, and can simply and effectively desulfurize coal to achieve the aim of preventing spontaneous combustion of coal storage piles. The device can provide the required condition of desulfurization bacterium, and is simple and convenient relatively, can retrieve waste water, waste liquid simultaneously, can not cause the pollution to the environment to have following beneficial effect:
1. the device has no requirement on the form of raw coal, and can be used in powder or block form; (ii) a
2. Solid-liquid separation is realized, and the coal can be quickly extracted from the bacterial liquid by using equipment;
3. the device can realize the circulation of bacteria liquid (water).
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following detailed description is given in conjunction with the preferred embodiments, together with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic structural diagram of an apparatus for microbial removal of sulfur from coal according to the present invention;
FIG. 2 is a schematic structural view of a coal handling apparatus according to the present invention.
Detailed Description
Other aspects, features and advantages of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which form a part of this specification, and which illustrate, by way of example, the principles of the invention. In the referenced drawings, the same or similar components in different drawings are denoted by the same reference numerals.
The invention adopts the microorganism desulfurization principle to put coal and bacterial liquid together, and the coal is soaked in the bacterial liquid, so that the bacteria and the coal are fully contacted and reacted, thereby achieving the desulfurization effect. As shown in fig. 1 to 2, the device for removing sulfur in coal by microorganisms provided by the invention comprises a hanging seat 1, a hanging tool 2 which is arranged below the hanging seat 1 and is formed by combining a fixed pulley, a rope and a hook, a coal loading and unloading device 3, a bacteria liquid injection pump 5, a bacteria liquid storage tank 6, a bacteria liquid injection switch 7, a water injection switch 8, a water injection pump 9, a water storage tank 10, an extracted water storage tank 11, a water suction pump 12, a water suction switch 13, a bacteria liquid extraction switch 14, an extracted bacteria liquid storage tank 15, a bacteria liquid extraction pump 16, a bacteria liquid and coal reaction tank 17. The bacteria liquid injection pump 5 is positioned in the bacteria liquid storage tank 6, and injects the bacteria liquid in the bacteria liquid storage tank 6 into the bacteria liquid and coal reaction tank 17 through a bacteria liquid injection pipeline, and the bacteria liquid injection switch 7 is installed on the bacteria liquid injection pipeline. The water injection pump 9 is positioned in the water storage tank 10, and injects the clean water in the water storage tank 10 into the bacteria liquid and coal reaction tank 17 through a water injection pipeline, and the water injection switch 8 is installed on the water injection pipeline. The bacteria liquid storage tank 6 and the water storage tank 10 can be positioned on the same side of the coal reaction tank 17.
The extracted water storage tank 11 and the extracted bacteria liquid storage tank 15 are located on the other side of the bacteria liquid and coal reaction tank 17, the bacteria liquid pump 16 is located in the extracted bacteria liquid storage tank 15, and the bacteria liquid after the reaction between the bacteria liquid and the coal reaction tank 17 is pumped into the extracted bacteria liquid storage tank 15 through a bacteria liquid pumping pipeline, and the bacteria liquid pumping switch 14 is installed on the bacteria liquid pumping pipeline. The water suction pump 12 is positioned in the extracted water storage tank 11, and pumps the water soaked in the bacteria liquid and coal reaction tank 17 for a period of time into the extracted water storage tank 11 through a water suction pipeline, and the water suction switch 13 is installed on the water suction pipeline.
The sulfur content of the coal transported out of the shaft is high, the coal is easy to generate oxidation reduction reaction after long-time stacking and poor heat dissipation conditions, and the sulfur content of the coal is reduced by adopting a microbial desulfurization method in order to prevent spontaneous combustion of the coal storage pile.
Firstly, coal is loaded into the coal loading and unloading device 3 (the size of the coal loading and unloading device 3 can be set according to the requirement), because the coal is heavier, the hanging seat 1 and the electric fixed pulley are adopted, the time and the labor can be saved, and the coal loading and unloading device 3 loaded with the coal can be conveniently and quickly placed into the bacteria liquid and coal reaction tank 17. The prepared bacteria liquid is placed in a bacteria liquid storage tank 6, a bacteria liquid injection switch 7 is opened, the bacteria liquid is injected into a bacteria liquid and coal reaction tank 17 under the pressure of a bacteria liquid injection pump 5, the temperature of the bacteria liquid and the bacteria liquid in the coal reaction tank 17 is improved through a heating insulation layer 4 on the wall surface of the bacteria liquid and coal reaction tank 17, after the temperature is increased to a required temperature, the insulation state is started, the optimal temperature for desulfurization of different bacteria liquid is different, coal reacts with the bacteria liquid, and desulfurization is completed in a certain period.
And then opening a bacteria liquid extracting switch 14, extracting the bacteria liquid after the reaction between the bacteria liquid and the coal reaction tank 17 to an extracted bacteria liquid storage tank 15 under the action of a bacteria liquid extracting pump 16, wherein the activity of bacteria in the bacteria liquid is low, the pH of the solution is about 2, the solution belongs to strong acid, the solution is recycled to prevent environmental pollution, and the extracted bacteria liquid can be used for separating and mutagenizing more appropriate strains. After the coal is soaked in the bacteria liquid for a long time, the pH value of the coal is reduced, the coal needs to be cleaned in order to not damage the properties and inherent attributes of the coal, at the moment, a water injection switch 8 is turned on to inject water in a water storage tank 10 into a bacteria liquid and coal reaction tank 17 under the action of a water injection pump 9, after the coal is soaked for a period of time, a water pumping switch 13 is turned on to pump the water in the bacteria liquid and coal reaction tank 17 into a pumping water storage tank 11 under the action of a water pumping pump 12, and the steps are repeated until the bacteria liquid and the solution in the coal reaction tank 17 are neutral. And finally, taking the coal out of the bacterial liquid and coal reaction tank 17 through a fixed pulley, a rope and a hook, naturally airing and drying the coal, and stacking the coal.
The device of the invention can realize solid-liquid separation by utilizing the coal loading and unloading device 3, so that the whole process is simple, convenient and numerous; meanwhile, coal samples with different particle sizes can be screened according to the coal loading and unloading device 3, the coal loading and unloading device 3 is a cubic sieve, and the coal samples are soaked in the bacterial liquid through the coal loading and unloading device 3. The device is applied to the reality, carries out the desulfurization to the high-sulfur coal of production, piling up, therefore carries on once as much as possible, and loading and unloading coal device 3 temporarily designs into the cube sieve of 1 mx 1m (can customize different sizes according to actual conditions), and the size is slightly littleer than fungus liquid and coal reaction tank 17, and this equipment is used for loading and unloading the coal, and the span of quality interval is great, for avoiding the quality problem, should use the material preparation that the bearing capacity is better such as steel. The diameters of the piled coal samples are different, some are in a massive shape, some are in a granular shape, and some are in a powdery shape, if the sizes of the meshes of the coal loading and unloading device 3 are unified, the desulfurization effect can be reduced, because the soaking time of the massive coal samples is as long as possible, and the powdery coal samples do not need to be long. The coal sample can be respectively separated according to the diameter in the process of loading and screening the coal sample so as to be used for different purposes.
The coal loading and unloading device 3 is specifically designed as shown in fig. 2, the size of the sieve mesh 31 formed on the four peripheral surfaces can be designed according to the coal particle diameter (10cm, 5cm, 3cm, 1cm, 0.5cm and the like), and the iron rings 32 positioned at the four corners of the top of the three-dimensional sieve (coal loading and unloading device 33) are mainly used for facilitating the iron chains (or thick ropes) 33 to be sleeved so as to lift and load and unload coal.
The invention is a simple and effective method by utilizing microbial desulfurization, and can effectively reduce the pollution of high-sulfur coal to the environment and the risk of spontaneous combustion of the coal. The method can greatly improve the treatment effect, reduce the cost, and has simple operation, safety and reliability.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (7)
1. A device for removing sulfur in coal by microorganisms comprises a hanging seat and a coal loading and unloading device hung below the hanging seat through a hanger, and is characterized by also comprising a bacterial liquid and a coal reaction tank for soaking the coal loading and unloading device;
a bacteria liquid storage box is arranged on one side of the bacteria liquid and coal reaction tank and used for providing bacteria liquid to the bacteria liquid and coal reaction tank so that the bacteria liquid reacts with coal in the coal loading and unloading device to complete desulfurization;
and a water storage tank is further arranged on one side of the bacteria liquid and coal reaction tank and used for providing clean water for the bacteria liquid and coal reaction tank to clean coal in the coal loading and unloading device.
2. The apparatus for microbial removal of sulfur in coal according to claim 1, wherein the other side of said bacteria liquid and coal reaction tank is provided with a pumped bacteria liquid storage tank for storing bacteria liquid after reaction in the coal reaction tank;
and a pumped water storage tank is arranged on the other side of the bacterial liquid and coal reaction tank and is used for storing water after being soaked in the bacterial liquid and coal reaction tank for a period of time.
3. The apparatus for microbial removal of sulfur in coal according to claim 1, wherein a bacteria liquid injection pump is arranged in the bacteria liquid storage tank, an outlet of the bacteria liquid injection pump is communicated with the bacteria liquid and coal reaction tank through a bacteria liquid injection pipeline, and a bacteria liquid injection switch is arranged on the bacteria liquid injection pipeline;
the water storage tank is internally provided with a water injection pump, the outlet of the water injection pump is communicated with the bacteria liquid and coal reaction tank through a water injection pipeline, and the water injection pipeline is provided with a water injection switch.
4. The apparatus for microbial removal of sulfur in coal according to claim 2, wherein a bacteria liquid pumping pump is arranged in the bacteria liquid pumping storage tank, an inlet of the bacteria liquid pumping pump is communicated with the bacteria liquid and coal reaction tank through a bacteria liquid pumping pipeline, and a bacteria liquid pumping switch is arranged on the bacteria liquid pumping pipeline;
be equipped with the suction pump in the pump-out water storage box, the entry of this suction pump through draw water the pipeline with fungus liquid and coal reaction tank intercommunication, install the switch that draws water on the pipeline that draws water.
5. The apparatus for removing sulfur in coal by microorganisms according to claim 1, wherein a heating and insulating layer is provided on the wall surface of the bacteria solution and coal reaction tank for increasing the temperature of the bacteria solution and the bacteria solution in the coal reaction tank.
6. The apparatus for the microbial removal of sulfur from coal as claimed in claim 1, wherein said coal loading and unloading apparatus is of a rectangular structure and has a plurality of screen holes formed on the peripheral surface thereof; and iron rings are arranged at four corners of the top of the coal loading and unloading device.
7. The apparatus for microbial removal of sulfur from coal as claimed in claim 6, wherein said hanger is composed of fixed pulley, rope and hook, said hook is used to cover said iron ring and lift the coal handling apparatus by iron chain or rope.
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| CN202011339318.4A CN112592748A (en) | 2020-11-25 | 2020-11-25 | Device for removing sulfur in coal by microorganisms |
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| CN202011339318.4A CN112592748A (en) | 2020-11-25 | 2020-11-25 | Device for removing sulfur in coal by microorganisms |
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Citations (5)
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2020
- 2020-11-25 CN CN202011339318.4A patent/CN112592748A/en active Pending
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| CN204540710U (en) * | 2015-04-20 | 2015-08-12 | 三峡大学 | Fermented soya bean wash mill |
| CN105505512A (en) * | 2015-11-25 | 2016-04-20 | 广西阔能霸能源科技开发有限责任公司 | Microbial desulfurization method for coal |
| CN106867610A (en) * | 2017-03-01 | 2017-06-20 | 济南大学 | A kind of biologic cleanliness moulded coal hybrid fuel and preparation method thereof |
| WO2019027516A1 (en) * | 2017-08-04 | 2019-02-07 | General Electric Company | Reducing mercury air and water emissions from a coal fired power plant within a fgd system using a biocide |
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